Patent Description:
The architectural field is one of the important application fields of tempered glass. In order to pursue visual beauty and safety requirements, many buildings are designed with spherical or arc-shaped glass structures on exterior walls. These spherical or arc-shaped glass structures need to be decomposed into pieces of corresponding hyperboloid or multi-curved-surface arc-shaped tempered glass with smooth transitions for production processing and installation. This hyperboloid or multi-curved-surface arc-shaped tempered glass is prone to warping deformation during processing. The hyperboloid arc-shaped tempered glass with the warping deformation cannot be smoothly transitioned and connected during installation and connection, so it is impossible to install and constitute a satisfactory spherical or arc-shaped glass structure; and during practical production, it is difficult to produce and process this hyperboloid or multi-curved-surface arc-shaped tempered glass.

In order to ensure that the multi-curved-surface arc-shaped tempered glass does not deform as much as possible in the forming process, it is usually necessary to design a special multi-curved-surface glass tempering molding mold. Since there are many multi-curved-surface arc-shaped tempered glass specifications to constitute the spherical or arc-shaped glass structure, a special mold needs to be manufactured for multi-curved-surface arc-shaped tempered glass of each specification during production processing, leading to a large quantity of special molds of production apparatus, high manufacturing cost, and low universality of the special molds. Moreover, the special molds need to be frequently replaced, installed, and debugged during production processing, so that the production supporting time is long, and the production efficiency is low. Therefore, an apparatus that can produce multi-curved-surface tempered glass without a special mold needs to be designed, so as to improve the production efficiency and reduce the apparatus cost. There is also an apparatus that uses a flexible shaft to form glass at present. However, a transmission system of the apparatus is arranged at the end part of the flexible shaft, and includes a driving shaft and a driven shaft; and the upper part of the lower flexible shaft is also provided with a flexible shaft or roller that supports the forming. The structure is complicated, and the forming accuracy is low.

<CIT> discloses a forming apparatus for curved tempered glass, wherein the apparatus comprises a frame, an air grid system, and a forming system. The air grid system comprises an upper air grid group and a lower air grid group, mounted on the upper and lower halves of the frame, respectively, to guide the glass pane into the forming system. The forming system comprises two groups of longitudinal forming and arching mechanisms and a plurality of transverse forming and arching mechanisms arranged along the glass pane conveying direction. <FIG> illustrates a situation where the glass reaches a certain degree of bending, with the central parts of the rollers lowered by a motor unit. Roller is divided into sections, connected by an adjustable joint whose height is altered via the motor unit or a hand-operated adjusting screw, enabling permanent or variable lowering during the bending process to achieve different bending degrees.

<CIT> discloses glass sheets forming apparatus comprising an actuating mechanism that provides relative vertical movement of a lower deformable roll bed and an upper deformable roll former toward each other, after receiving each heated flat glass sheet between them, and that actuates the lower deformable roll bed and the upper deformable roll former to provide deformation, to cyclically form the heated glass sheets.

The present invention is directed to provide a forming apparatus for curved tempered glass. Special forming molds do not need to be manufactured one by one during forming of hyperboloid curved tempered glass, multi-curved-surface curved tempered glass or specially-shaped curved tempered glass, so that forming adjustment is fast, convenient, stable and reliable, glass is hard to deform, and the production efficiency is high.

In order to achieve the above objective, the present invention adopts the following technical solution:
A forming apparatus for curved tempered glass is provided, which includes a frame, an air grid system, and a forming system. The air grid system includes an upper air grid group consisting of a plurality of upper air grids, and a lower air grid group consisting of a plurality of lower air grids. The upper air grid group is mounted at an upper half of the frame by means of a lifting mechanism, and the lower air grid group is mounted in the forming system at a lower half of the frame (referring to <FIG> for understanding). A gradual transition section is arranged at an inlet side of the forming system; and the gradual transition section includes a plurality of transitional transverse arching mechanisms arranged on the frame and arranged in a glass pane conveying direction to enable a glass pane to be gradually arched in a transverse direction, and the gradually arched glass pane is conveyed into the forming system.

The forming system includes two groups of longitudinal forming and arching mechanisms and a plurality of transverse forming and arching mechanisms arranged in the glass pane conveying direction; the longitudinal forming and arching mechanisms are controlled by a lower arching mechanism to perform longitudinal curve forming on the glass pane in the forming system; the transverse forming and arching mechanisms are connected to the longitudinal forming and arching mechanisms through a lower support cross beam to perform transverse curve forming on the glass pane in the forming system. The transverse forming and arching mechanism includes an elastic piece, a plurality of height adjustment mechanisms and a glass conveying mechanism mounted on the elastic piece; a center position of the elastic piece in a lengthwise direction is fixed on the lower support cross beam; and two sides of the center position or a middle section are connected to the lower support cross beam through the plurality of height adjustment mechanisms; and the elastic piece is arched through the plurality of height adjustment mechanisms.

The transitional transverse arching mechanism includes an elastic piece, a plurality of height adjustment mechanisms, and a glass conveying mechanism mounted on the elastic piece; a center position or a middle section of the elastic piece in a lengthwise direction is fixed on a support beam, and two sides of a fixed point are connected to the support beam through the plurality of height adjustment mechanisms; the elastic piece is arched through the plurality of height adjustment mechanisms; and the support beam is fixed on the frame.

The glass conveying mechanism includes a flexible shaft provided with a conveying wheel, supports, and a drive system; the flexible shaft is fixed on the elastic piece through the supports distributed at intervals, and is parallel to the elastic piece; and a center position of the flexible shaft in a lengthwise direction is connected to the drive system.

The lower air grid is composed of a plurality of lower air blowing boxes; the plurality of lower air blowing boxes are arranged between adjacent transverse forming and arching mechanisms in the lengthwise direction of the elastic piece; the lower air blowing boxes are mounted on the elastic piece, so that the lower air blowing boxes act with arching actions of the transverse forming and arching mechanisms and the longitudinal forming and arching mechanisms.

The lower air blowing boxes are respectively provided with independent air ducts.

The elastic piece is any one of a spring steel wire, a steel spring plate or a carbon fiber elastic piece.

The upper air grid includes an upper air grid longitudinal arching mechanism and an upper air grid transverse arching mechanism; the upper air grid longitudinal arching mechanism is connected to an upper arching mechanism mounted on the frame; and the upper air grid transverse arching mechanism is connected to the upper air grid longitudinal arching mechanism through an upper support cross beam.

The upper air grid transverse arching mechanism includes an elastic piece and a height adjustment mechanism; a center position of the elastic piece in the lengthwise direction is fixed on the upper support cross beam, and two sides of a fixed point is connected to the upper support cross beam through the height adjustment mechanism; the upper air grid further includes a plurality of upper air blowing boxes; the plurality of upper air blowing boxes are arranged between adjacent upper air grid transverse arching mechanisms in the lengthwise direction of the elastic piece; and the upper air blowing boxes are mounted on the elastic piece, so that angles and positions of the upper air blowing boxes vary with arching actions of the upper air grid transverse arching mechanisms and the upper air grid longitudinal arching mechanisms.

Air blowing passages are arranged in the upper air blowing boxes, and the air blowing passages in the upper air blowing boxes are not mutually communicated.

The upper air grid longitudinal arching mechanism is formed by hinging a plurality of connecting plates end to end in sequence; the connecting plate includes a protruding end away from a hinge point; the protruding ends of two adjacent connecting plates are connected through a bolt, and two ends of the bolt are hinged with the protruding ends of the two adjacent connecting plates; the bolt is connected with a nut for adjusting a distance between the protruding ends of two adjacent connecting plates through threads; and end parts of the upper support cross beam are fixedly connected to the connecting plates.

The connecting plate is a T-shaped plate, a tee-heeded plate, a trapezoid plate or a triangular plate.

The longitudinal forming and arching mechanism in the forming system is formed by rotatably connecting a plurality of chain plate assemblies end to end in sequence, and the chain plate assembly includes a protruding part away from a rotatable connection point; adjacent chain plate assemblies are connected through a connecting rod, and one end of the connecting rod is provided with a sliding block capable of sliding in a lengthwise direction of the protruding part; and the protruding part is provided with an adjustment device for adjusting a sliding travel of the sliding block.

A chain plate in the chain plate assembly is a T-shaped chain plate, a tee-heeded chain plate, a trapezoid chain plate or a triangular chain plate.

The upper arching mechanism and the lower arching mechanism each includes a power mechanism and a pulling mechanism; the power mechanism is a motor; and the pulling mechanism is a chain or a steel wire rope.

A forming method for multi-curved-surface tempered glass is provided. A forming apparatus used by the forming method includes a gradual transition section, a forming system, and an air grid system. The gradual transition section includes a plurality of transitional transverse arching mechanisms; the forming system includes a plurality of transverse forming and arching mechanisms and a plurality of longitudinal forming and arching mechanisms; and the air grid system includes an upper air grid group consisting of a plurality of upper air grids and a lower air grid group consisting of a plurality of lower air grids. The forming method includes the following steps:.

In addition, the forming method for the multi-curved-surface tempered glass can further adjust the steps on the basis of the above steps to derive steps of the following two forming methods.

The advantageous effects of the present invention are as follows.

The forming apparatus of the present invention is provided with the longitudinal forming and arching mechanisms for forming the glass pane in a lengthwise direction and the transverse forming and arching mechanisms for forming the glass pane in a width direction, and the longitudinal forming and arching mechanisms and the transverse forming and arching mechanisms can be adjusted into single-curvature, hyperboloid or multi-curvature structures according to production needs, so as to satisfy production of hyperboloid curved tempered glass, multi-curved-surface curved tempered glass or specially-shaped curved tempered glass; the apparatus is extremely high in universality; moreover, there is no need to make lots of special forming molds during forming; forming and adjustment are fast, convenient, stable, and reliable; glass is hard to deform; and the production efficiency is high.

According to the forming apparatus of the present invention, since the longitudinal forming and arching mechanism and the transverse forming and arching mechanism can be separately adjusted, and one set of apparatus can produce flat tempered glass, transversely curved tempered glass arched in the lengthwise direction, and longitudinally curved tempered glass arched in the width direction, and curved tempered glass of various shapes, such as hyperboloid curved tempered glass, multi-curved-surface curved tempered glass or specially-shaped curved tempered glass arched in both the lengthwise and width directions.

By the use of the elastic pieces in the present invention, the transverse forming and arching mechanisms taking the flexible shafts as main bodies and the upper air grids are more uniform and smoother in arching, which is conductive to improving the accuracy of a curved surface of curved tempered glass; moreover, supports for the flexible shafts can be reduced due to the rigidity of the elastic pieces, so that the structures of the transverse forming and arching mechanisms are simplified, the cost of production of the apparatus is reduced, and the frequency of mechanical failures is reduced.

The gradual transition section is arranged in front of the forming system in the present invention, the glass pane can be preformed before it enters the forming system to lower the difficulty of curve forming of the glass pane; and moreover, the gradual transition section is to curve the glass pane in the transverse direction, which can also reduce the transverse size of the glass and facilitate the glass pane to successfully enter the forming system that has been transversely arched.

Marks in the drawings: <NUM>: frame; <NUM>: upper air grid; <NUM>: forming system; <NUM>: upper air grid longitudinal arching mechanism; <NUM>: upper arching mechanism; <NUM>: lifting mechanism; <NUM>: longitudinal forming and arching mechanism; <NUM>: lower arching mechanism; <NUM>: upper air grid transverse arching mechanism; <NUM>: upper support cross beam; <NUM>: height adjustment mechanism; <NUM>: screw rod and nut mechanism; <NUM>: motor; <NUM>: transverse forming and arching mechanism; <NUM>: lower support cross beam; <NUM>: glass conveying mechanism; <NUM>: flexible shaft; <NUM>: conveying wheel; <NUM>: support; <NUM>: upper air blowing box; <NUM>: elastic piece; <NUM>: pressing piece; <NUM>: lower air blowing box; <NUM>: extending part; <NUM>: gradual transition section; <NUM>: transitional transverse arching mechanism; <NUM>: connecting plate; <NUM>: hinge point; <NUM>: protruding end; <NUM>: rotating shaft; <NUM>: bolt; <NUM>: bolt head; <NUM>: nut; <NUM>: chain plate assembly; <NUM>: chain plate; <NUM>: duplex chain wheel; <NUM>: adjustment chain wheel; <NUM>: rotating shaft; <NUM>: top plate; <NUM>: screw rod; <NUM>: sliding block; <NUM>: splined hub; <NUM>: connecting block; <NUM>: bottom plate; <NUM>: hexagonal shaft; <NUM>: bevel gear pair; <NUM>: protruding part; <NUM>: connecting rod; <NUM>: rotating shaft; <NUM>: driving chain wheel; <NUM>: driving gear; <NUM>: driven gear; and <NUM>: air inlet.

The technical solutions of the present invention are further described below through specific implementations in combination with accompanying drawings. The "longitudinal direction" in this specification refers to a direction parallel to a moving direction of a glass pane, and the "transverse direction" refers to a direction perpendicular to the moving direction of the glass pane.

As shown in the figures, a forming apparatus for curved tempered glass includes a frame <NUM>, an air grid system, and a forming system <NUM>. The air grid system includes a plurality of upper air grids and a plurality of lower air grids. The upper air grids are mounted at an upper half of the frame <NUM> by means of a lifting mechanism <NUM>, and the lower air grids are mounted in the forming system <NUM> at a lower half of the frame <NUM>; and the upper half of the frame <NUM> and the lower half of the frame <NUM> are as shown in <FIG>.

An inlet side of the forming system <NUM> is provided with a gradual transition section <NUM>; the gradual transition section <NUM> includes a plurality of transitional transverse arching mechanisms <NUM> arranged on the frame <NUM> and arranged in a glass pane conveying direction, and a glass conveying mechanism <NUM> mounted on the transitional transverse arching mechanisms <NUM>, so that a glass pane is gradually arched in a transverse direction, and the gradually arched glass pane is conveyed into the forming system <NUM>; and the transitional transverse arching mechanism <NUM> can be arranged on either the frame <NUM> or an independent frame.

The forming system <NUM> includes two groups of longitudinal forming and arching mechanisms <NUM> and a plurality of transverse forming and arching mechanisms <NUM> arranged in the glass pane conveying direction; two ends of the longitudinal forming and arching mechanisms <NUM> in the glass pane conveying direction are connected to a lower arching mechanism <NUM> mounted on the frame <NUM>, and are lifted by the lower arching mechanism <NUM> to realize longitudinal arching of the longitudinal forming and arching mechanisms <NUM> to perform longitudinal curve forming on the glass pane in the forming system <NUM>; the transverse forming and arching mechanisms <NUM> are connected to the longitudinal forming and arching mechanisms <NUM> through a lower support cross beam <NUM>; the transverse forming and arching mechanism <NUM> includes an elastic piece <NUM>, a plurality of height adjustment mechanisms <NUM>, and a glass conveying mechanism <NUM>; a center position of the elastic piece <NUM> in a lengthwise direction is fixed on the lower support cross beam <NUM>, and two sides of a fixed point are connected to the lower support cross beam <NUM> through the height adjustment mechanisms <NUM>; and when the plurality of height adjustment mechanisms <NUM> are adjusted to different heights, the shape of the elastic piece <NUM> can be changed, so that the transverse forming and arching mechanism <NUM> arches to perform transverse curve forming on the glass pane in the forming system <NUM>.

In the gradual transition section <NUM>, the transitional transverse arching mechanism <NUM> is of the same structure as the transverse forming and arching mechanism <NUM>, i.e., it includes an elastic piece <NUM>, a plurality of height adjustment mechanisms <NUM>, and a glass conveying mechanism <NUM> mounted on the elastic piece <NUM>; a center position of the elastic piece <NUM> in a lengthwise direction is fixed on a support beam below, and two sides of a fixed point are provided with the plurality of height adjustment mechanisms <NUM>; one end of the height adjustment mechanism <NUM> is fixed on the support beam, and the other end is connected to the elastic piece <NUM>; when the plurality of height adjustment mechanisms <NUM> are adjusted to different heights, the shape of the elastic piece <NUM> can be changed, so that the transitional transverse arching mechanism <NUM> arches to preform the glass pane entering the gradual transition section <NUM> in the transverse direction; and the support beam is fixed on the frame <NUM>. What is different from the forming system is that no lower air grids are mounted in the gradual transition section <NUM>.

The glass conveying mechanism <NUM> includes a flexible shaft <NUM> provided with a conveying wheel <NUM>, supports <NUM>, and a drive system. The flexible shaft <NUM> is parallel to the elastic piece <NUM>, and is fixed on the elastic piece <NUM> through the supports <NUM> distributed at intervals; a center position of the flexible shaft <NUM> in the lengthwise direction is connected to the drive system to provide power to realize rotation; and the softened glass pane can be formed by means of the own weight when being conveyed by the conveying wheel <NUM>.

The drive system includes a transmission system and a drive motor; the transmission system is arranged below the middle part of the flexible shaft <NUM>; and the drive motor transmits power to the flexible shaft <NUM> from the middle part of the flexible shaft <NUM> through the transmission system. As such, the phenomenon that a driving side and a driven side rotate asynchronously during transmission of the flexible shaft <NUM> can be avoided. Moreover, axial movement of the flexible shaft <NUM> on the support <NUM> can be reduced, deviation of glass during motion can be avoided, and the glass shape accuracy can be improved. Furthermore, the flexible shaft needs to participate in arching, and therefore the height of the end part of the flexible shaft <NUM> is not fixed. When power is provided from the end part of the flexible shaft <NUM>, this has an extremely high requirement for the structure of the transmission system, and it is so hard to realize in case of guaranteeing the arching accuracy. There are two cases for the "middle part". In the first case, when the flexible shaft <NUM> is a long shaft, the "middle part" refers to the center position of the flexible shaft <NUM> in the lengthwise direction; and in the second case, when the flexible shaft <NUM> is formed by connecting two half shafts, the "middle part" refers to a joint of the two half shafts.

Further, the transmission system includes a rotating shaft <NUM> arranged below the middle part of the flexible shaft <NUM>, and a driving chain wheel <NUM> and a driving gear <NUM> which are fixed on the rotating shaft <NUM>; and a driven gear <NUM> meshing with the driving gear <NUM> is fixed on the flexible shaft <NUM>.

The lower air grid is composed of a plurality of lower air blowing boxes <NUM> arranged between adjacent transverse forming and arching mechanisms <NUM> in an axial direction of the flexible shaft <NUM>; the lower air blowing box <NUM> is internally provided with an air blowing passage, and the air blowing passages of the lower air blowing boxes <NUM> are not mutually communicated; the lower air blowing boxes <NUM> are mounted on the elastic piece <NUM>, so that angles and positions of the lower air blowing boxes <NUM> vary with the arching actions of the transverse forming and arching mechanisms <NUM> and the longitudinal forming and arching mechanisms <NUM>.

The upper air grid includes an upper air grid longitudinal arching mechanism <NUM> and an upper air grid transverse arching mechanism <NUM>; the upper air grid longitudinal arching mechanism <NUM> is connected to an upper arching mechanism <NUM> mounted on the frame <NUM>; and the upper air grid transverse arching mechanism <NUM> is connected to the upper air grid longitudinal arching mechanism <NUM> through an upper support cross beam <NUM>.

The upper arching mechanism <NUM> includes a power mechanism and a pulling mechanism. The pulling mechanism can adopt a chain and chain wheel mechanism or
a steel wire rope, etc. The structure of the lower arching mechanism <NUM> is the same as the structure of the upper arching mechanism <NUM>.

The upper air grid transverse arching mechanism <NUM> uses the same elastic piece <NUM> and height adjustment mechanisms <NUM> as the transverse forming and arching mechanism <NUM>. The center position of the elastic piece <NUM> in the lengthwise direction is fixed on the upper support cross beam <NUM>, and two sides of a fixed point are connected to the upper support cross beam <NUM> through the height adjustment mechanisms <NUM>; when the plurality of height adjustment mechanisms <NUM> are adjusted to different heights, the shape of the elastic piece <NUM> can be changed, so that the upper air grid transverse arching mechanism <NUM> arches. The upper air grid further includes a plurality of upper air blowing boxes <NUM> arranged between adjacent upper air grid transverse arching mechanisms <NUM> in the axial direction of the elastic piece <NUM>; air blowing passages are formed in the upper air blowing boxes <NUM>, and the air blowing passages of the upper air blowing boxes <NUM> are not mutually communicated; the upper air blowing boxes <NUM> are mounted on the elastic piece <NUM>, so that angles and positions of the upper air blowing boxes <NUM> vary with the arching actions of the upper air grid transverse arching mechanisms <NUM> and the upper air grid longitudinal arching mechanisms <NUM>.

The upper air blowing box <NUM> and the lower air blowing box <NUM> are each provided with an independent air inlet <NUM> to connect an air inlet hose; sides of the upper air blowing box <NUM> and the lower air blowing box <NUM> close to the glass pane are arc-shaped surfaces; and a plurality of air blowing ports are uniformly distributed on the arc-shaped surfaces.

Further, the elastic piece <NUM> can select one of a spring steel wire, a steel spring plate or a carbon fiber elastic piece. As shown in <FIG>, the elastic piece <NUM> uses three spring steel wires; a plurality of pressing pieces <NUM> for clamping and fixing the spring steel wires are arranged in the lengthwise direction of the elastic piece <NUM>; each pressing piece <NUM> is formed by fixedly connecting an upper sheet with a lower sheet; the middle parts of the lower sheets are provided with grooves for accommodating the spring steel wires (the grooves are not shown in <FIG>), and the spring steel wires are clamped by the upper sheets pressing the lower sheets; the end parts of the lower sheets or the upper sheets are provided with grooves; the grooves are cooperatively assembled with extending parts <NUM> on the upper and lower air blowing boxes <NUM>, <NUM>; and one side of each of the upper and lower air blowing boxes <NUM>, <NUM> is provided with two extending parts <NUM>, and the other side is provided with one extending part <NUM>, or only one side of each of the upper and lower air blowing boxes <NUM>, <NUM> is provided with two extending parts <NUM>.

The upper air blowing box <NUM> and the lower air blowing box <NUM> can also be mounted between two adjacent elastic pieces <NUM> in other ways, and are only connected to one of the elastic pieces <NUM>. For example, connection to the elastic piece <NUM> can be realized by means of a connecting plate; the connecting plate can be used as one part of the structures of the upper air blowing box <NUM> and the lower air blowing box <NUM>, or can be used as a component on the elastic piece <NUM> to suspend the upper air blowing box <NUM> and the lower air blowing box <NUM> on one side of the elastic piece <NUM>.

The height adjustment mechanism <NUM> can adopt a screw rod and nut mechanism <NUM> driven by a motor <NUM>, or a gear and rack mechanism driven by a motor, and can also use other mechanisms that can realize linear motion, such as an electric push rod.

Preferably, in this example, the height adjustment mechanism <NUM> includes the screw rod and nut mechanism <NUM> and the motor <NUM>; the screw rod and nut mechanism <NUM> includes a screw rod and a nut which cooperate with each other; one end part of the screw rod is connected to the elastic piece <NUM> through the connecting plate, and the screw rod and the connecting plate are rotatablly connected; the motor <NUM> is fixed on a motor base; the motor base is rotatably connected to the upper support cross beam <NUM> or the lower support cross beam <NUM>; and the nut is driven to rotate by the motor <NUM> by means of a bevel gear pair to realize the linear motion of the screw rod.

The upper air grid longitudinal arching mechanism <NUM> is formed by hinging a plurality of connecting plates <NUM> end to end in sequence; the connecting plate <NUM> includes a protruding end <NUM> away from a hinge point <NUM>; the lengthwise direction of the protruding end <NUM> is perpendicular to a connecting line of the hinge points at two ends of the connecting plate <NUM>; and preferably, the protruding end <NUM> is arranged along a perpendicular bisector of the connecting line of two hinge points; the protruding ends <NUM> of two adjacent connecting plates <NUM> are connected through a bolt <NUM>; two ends of the bolt <NUM> are respectively hinged to the protruding ends <NUM> of the two adjacent connecting plates <NUM>; the bolt <NUM> is connected with the nut <NUM> for adjusting a distance between the protruding ends <NUM> of two adjacent connecting plates <NUM> through threads; and the end part of the upper support cross beam <NUM> is fixedly connected to the connecting plates <NUM>.

The protruding end <NUM> of the connecting plate <NUM> is provided with two rotating shafts <NUM> that are perpendicular to the board surface of the protruding end <NUM> and capable of freely rotating; the two rotating shafts <NUM> are arranged up and down; each rotating shaft <NUM> is provided with a shaft hole perpendicular to the axial direction of the rotating shaft <NUM> so as to arrange the bolt <NUM> in a penetrating manner, and two ends of the bolt <NUM> are respectively disposed in the shaft holes of the two rotating shafts <NUM> on adjacent connecting plates <NUM> at the same height in a penetrating manner; an aperture of the shaft hole is greater than a diameter of the bolt <NUM>, so as to provide a space for the movement between the connecting plates <NUM> in the arching process.

In the two rotating shafts <NUM> on the connecting plate <NUM>, two sides of one rotating shaft <NUM> are respectively a bolt head <NUM> and a nut <NUM>, and two sides of the other rotating shaft <NUM> are respectively two nuts <NUM>.

The distances between the protruding ends <NUM> of the connecting plates <NUM> determine a radian of an arc formed by the upper air grid longitudinal arching mechanism <NUM>. Therefore, before the apparatus is used, the distances between the protruding ends <NUM> of adjacent connecting plates <NUM> need to be adjusted by means of adjusting the positions of the nuts <NUM> on the bolts <NUM>, so as to meet a need for glass forming.

The connecting plate <NUM> can be a T-shaped connecting plate, a tee-heeded connecting plate, a trapezoid connecting plate, or can be a triangular connecting plate, or is of other shapes satisfying the shape characteristic of the connecting plate.

As shown in <FIG> and <FIG>, the longitudinal forming and arching mechanism <NUM> in the forming system <NUM> is formed by rotatably connecting a plurality of chain plate assemblies <NUM> end to end in sequence through rotating shafts <NUM>; adjacent chain plate assemblies <NUM> are connected through a single connecting rod <NUM>; the chain plate assembly <NUM> includes two chain plates <NUM> that are fixedly connected; the chain plate <NUM> has two shaft holes used for mounting the rotating shafts <NUM> and a protruding part <NUM>; the lengthwise direction of the protruding part <NUM> is perpendicular to a connecting line of the two shaft holes; a sliding block adjustment mechanism is mounted between the two chain plates <NUM>; the sliding block adjustment mechanism includes a screw rod <NUM>, a splined hub <NUM>, and a sliding block <NUM>; two ends of the screw rod <NUM> are rotatably connected to a top plate <NUM> and a bottom plate <NUM> of the chain plate assembly <NUM>, and one end of the screw rod <NUM> is a hexagonal shaft <NUM>; the splined hub <NUM> is in threaded connection with the screw rod <NUM>, and the splined hub <NUM> is slidably connected with the sliding block <NUM> through external splines ; a spline slot of the external spline is parallel to the axial direction of the screw rod <NUM>; one end of the connecting rod <NUM> is rotatably connected to the sliding block <NUM>, and the other end of the connecting rod <NUM> is rotatably connected to the adjacent screw rod <NUM>; an adjustment chain wheel <NUM> capable of being connected to power to drive the screw rod <NUM> to rotate is arranged on the protruding part <NUM>; the end part of the rotating shaft <NUM> is provided with a duplex chain wheel <NUM>; the adjustment chain wheels <NUM> and the duplex chain wheels <NUM> on the plurality of chain plate assemblies <NUM> are connected through chains and rotate synchronously; and the chains are tensioned by tensioning mechanisms arranged on the chain plates <NUM>.

The adjustment chain wheel <NUM> drives the screw rod <NUM> to rotate through the bevel gear pair <NUM>; and the bevel gear pair <NUM> is formed by meshing a bevel gear arranged on the screw rod <NUM> and a bevel gear arranged on an axle of the adjustment chain wheel <NUM>.

The duplex chain wheel <NUM> and the adjustment chain wheel <NUM> on the chain plate <NUM> are in an equilateral triangle layout, and are connected with the chains; and two chains in adjacent chain plate assemblies <NUM> are respectively mounted on the duplex chain wheel <NUM> shared by the two chain plate assemblies <NUM>, thereby realizing synchronous rotation of all the adjustment chain wheels <NUM>.

The tensioning mechanism includes a tensioning wheel and an L-shaped mounting seat which are mounted on the chain plates <NUM>; one end of the mounting seat is provided with an elongated slot; the mounting seat is fixed on the board surface of the chain plate <NUM> by means of cooperation of a screw and the elongated slot; the other end of the mounting seat is provided with an adjustment screw; the adjustment screw is connected to the end part of the chain plate <NUM>; and by adjusting the screw-in amount of the adjustment screw, the mounting seat can move up and down along the elongated slot to tension the chain.

The bottom end of the splined hub <NUM> is provided with a sliding block stop ring; in the arching process of the arching mechanism, the sliding block <NUM> slides down along the spline slot; after the sliding block <NUM> presses the sliding block stop ring, an angle between adjacent chain plate assemblies <NUM> is maximum, and the radius of a formed arc is minimum.

The sliding blocks <NUM> on all the chain plate assemblies <NUM> can be driven to be adjusted to the same position when the adjustment chain wheels <NUM> are connected to external power, so as to complete equal-arc adjustment. At this time, equal-arc curved tempered glass can be produced. After connection between the adjustment chain wheels <NUM> is cut off, the hexagonal shafts <NUM> at the end parts of the screw rods <NUM> are adjusted to separately adjust the sliding blocks <NUM> on the screw rods <NUM>, so that unequal arcs are obtained after arching. This is unequal-arc adjustment at this time, and can be used for producing unequal-arc curved tempered glass.

The chain plate <NUM> is a T-shaped chain plate, a tee-heeded chain plate or a trapezoid chain plate, or is of other shapes that satisfy the characteristic of the chain plate.

A forming method for multi-curved-surface tempered glass is provided. The forming method is executed by using the above forming apparatus, and includes the following steps:.

In addition, the forming method for multi-curved-surface tempered glass can further adjust the steps on the basis of the above steps to derive two forming methods with different operations. The derivative methods are described below.

In Derivative method <NUM>, before the glass pane enters the forming system <NUM>, the upper air grid longitudinal arching mechanisms <NUM> are not adjusted, but are synchronously adjusted with the longitudinal forming and arching mechanisms <NUM>.

Specific steps of Derivative method <NUM> are as follows:.

In Derivative method <NUM>, ends of the longitudinal forming and arching mechanisms <NUM> close to an outlet side of the forming system <NUM> need to be pulled to desired positions before glass enters the forming system <NUM>. This is because the temperature of the front end that enters the forming system <NUM> first is lower due to a larger longitudinal size after a large-size glass pane enters the forming system <NUM>. At this time, if the longitudinal forming and arching mechanisms <NUM> are pulled for arching after the whole glass pane enters the forming system <NUM>, it is very hard to form an arc at the front end of the glass pane due to the lower temperature. Therefore, in this method, before the glass pane enters the forming system <NUM>, the ends of the longitudinal forming and arching mechanisms <NUM> close to the outlet side of the forming system <NUM> are pulled to the desired positions to avoid the problem that the front end of the glass pane is hard to form, thus improving the quality of curve forming of the large-size glass pane.

The above apparatus can be used to produce various specially-shaped curved-surface glass such as transverse single-curved-surface unequal-arc glass, longitudinal positive and negative curved single-curved-surface glass, unidirectional hyperboloid glass, and positive and negative curved bidirectional multi-curved-surface glass. Different production processes can be selected according to a specific radius and arch rise of glass.

The transitional transverse arching mechanisms <NUM>, the transverse forming and arching mechanisms <NUM>, and the upper air grid transverse arching mechanisms <NUM> are all adjusted to be horizontal; the longitudinal forming and arching mechanisms <NUM> are kept flat; the upper air grid longitudinal arching mechanisms <NUM> are adjusted to a desired radius; after glass is conveyed out of the furnace and moves through the gradual transition section <NUM> to a specified position of the forming system <NUM>, the lower arching mechanism <NUM> lifts and pulls the longitudinal forming and arching mechanisms <NUM> to realize arching; the glass pane is arched under the gravity and swings in a reciprocating manner in the forming system <NUM>; and air is blown for cooling to complete tempering.

The transitional transverse arching mechanisms <NUM>, the transverse forming and arching mechanisms <NUM>, and the upper air grid transverse arching mechanisms <NUM> are all adjusted to desired radii; the longitudinal forming and arching mechanisms <NUM> and the upper air grid longitudinal arching mechanisms <NUM> are kept flat; glass is conveyed out of the furnace, is gradually formed through the gradual transition section, and enters the lower air grid position of the forming system <NUM>; the glass pane is arched under the gravity and swings in a reciprocating manner in the forming system <NUM>; and air is blown for cooling to complete tempering.

Firstly, the transverse forming and arching mechanisms <NUM> in the forming system <NUM> are all adjusted to a desired radius position, and the longitudinal forming and arching mechanisms <NUM> are kept flat; the upper air grids are adjusted to positions matching with the shapes of the transverse forming and arching mechanisms <NUM>; secondly, a glass pane heated to a softened state leaves the heating furnace, enters the gradual transition section <NUM>, and is curved and gradually formed by the gradual transition section <NUM> in the transverse direction of the glass pane; after the whole gradually formed glass pane enters the forming system <NUM>, two ends of the longitudinal forming and arching mechanisms <NUM> are pulled by the lower arching mechanism <NUM> to desired positions for arching; at the same time, the upper air grids are adjusted in the longitudinal direction to positions matching with the shapes of the longitudinal forming and arching mechanisms <NUM>; the glass pane is formed under the gravity and swings in a reciprocating manner in the forming system <NUM>; and air is blown for cooling to complete tempering.

Claim 1:
A forming apparatus for curved tempered glass, wherein the apparatus comprises a frame, a gradual transition section (<NUM>), an air grid system, and a forming system (<NUM>); the air grid system comprises an upper air grid group consisting of a plurality of upper air grids (<NUM>), and a lower air grid group consisting of a plurality of lower air grids; the upper air grid group is mounted at an upper half of the frame, and the lower air grid group is mounted at a lower half of the frame; the gradual transition section (<NUM>) is arranged at an inlet side of the forming system (<NUM>); the gradual transition section (<NUM>) comprises a plurality of transitional transverse arching mechanisms (<NUM>) arranged in a glass pane conveying direction to enable a glass pane to be gradually arched in a transverse direction, and the gradually arched glass pane is conveyed into the forming system (<NUM>); the forming system (<NUM>) comprises two groups of longitudinal forming and arching mechanisms (<NUM>) and a plurality of transverse forming and arching mechanisms (<NUM>) arranged in the glass pane conveying direction, wherein the transitional transverse arching mechanism (<NUM>) comprises an elastic piece (<NUM>), a plurality of height adjustment mechanisms (<NUM>), and a glass conveying mechanism (<NUM>) mounted on the elastic piece (<NUM>); a center position or a middle section of the elastic piece (<NUM>) in a lengthwise direction is fixed on a support beam, and two sides of a fixed point are connected to the support beam through the plurality of height adjustment mechanisms (<NUM>); the elastic piece (<NUM>) is arched by adjusting the plurality of height adjustment mechanisms (<NUM>); and the support beam is fixed on the frame.