Abstract:
The present invention relates to a novel cutting equipment, which automatically cuts hard plastic pipes produced from an extruder, having a table, an input V shape leading wheel, an input fixing clamp apparatus mechanism, a cutting mechanism, a bearing transmission mechanism, an output fixing clamp apparatus mechanism, a V shape leading plate, a leading wheel, a cuttings collector, and an electric control system, which are assembled to a novel means of a hard pipe cutting machine.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a cutting machine, in particular, which is capable of automatically cutting hard plastic pipes produced from an extruder. 
     2. Description of the Related Prior Arts 
     The conventional hard pipe cutting equipment is generally manual, or semi-automatic, or automatic, wherein one of the automatic equipment is to cut, for small diameter pipes only, with a disc cutting apparatus (shown as FIG. 1) by way of rolling (shown as FIG. 2) which is not able to cut big diameter pipes. In addition, said equipment does not have chamfer means so that it can only cut without chamfering which makes it disable to cut medium and big diameter hard pipes. As for the semi-automatic equipment, which executes cutting by the coordination of a simple mechanism and a large cutting apparatus, the product of which needs to be further processed. The procedure is trivial and without efficiency. Besides, the operation environment is apt to be polluted by cuttings since the cutting operation is exposed to the atmosphere, which is consequently hazardous to operators. 
     SUMMARY OF THE INVENTION 
     The present invention discloses, aiming to resolve problems of prior arts, a novel cutting equipment with a high cutting efficiency and quality, which is suitable for various diameter and thickness of hard pipe to meet the requirement of automatic production. The present invention owns advantages of automation, high efficiency, manpower saving, cost reduction, and quality assurance. The characteristics of the present invention are as follows: 
     1. The cutting and input is adjusted and controlled by air-oil transfer circulation depending on cutting rate, which completes hard pipe cutting operation within a preset time period disregard of the thickness and productivity of hard pipes. 
     2. The hard pipe is automatically cut and chamfered by turning or is automatically rolled without cuttings under the coordination of replaceable cutting blade, chamfering blade or disk blade of cutting mechanism. 
     3. While the hard pipe is cut by turning, a centrifugal cuttings collector is used to collect cuttings so as to prevent the operation environment being polluted, which makes the present invention novel in terms of high efficiency, high quality, cleanness, multiple applications. 
     The characteristic of the present invention is to combine and improve the conventional semi-automatic and automatic hard pipe cutting equipments. The hard pipe cutting equipment is a novel means comprising a table  52 , an input V shape leading wheel  22 , an input linking-up clamp apparatus fixing mechanism, a cutting mechanism, a bearing linking-up mechanism, an output linking-up clamp apparatus fixing mechanism, a V shape leading plate, a leading wheel, a cuttings collector, and an electric control system. The cutting procedure of the novel means of the present invention is briefly described as follows: 
     The hard pipe, led from the leading equipment of preceding stage, is cut automatically in a preset cutting rate depending on the diameter of the pipe. Then, adjust and control the cutting blade and chamfering blade in accordance with the cutting rate by the design of air-oil transfer circulation to set an appropriate input so that the turning of hard pipe will not be affected by the production rate of the hard pipe. The cuttings are collected by a centrifugal collector. The cutting blade and chamfering blade, which are replaceable, are manufactured either in one body or separately depending on the requirement of production. The cutting and chamfering of the pipe can be accomplished at the same time and the cut surface can refrain from double cut trace. This equipment is not only suitable for various diameters of pipe but also suitable for various thickness of pipe. This equipment also owns advantages of high efficiency, cleanliness, and multiple purposed applications. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a conventional disc cutting apparatus. 
     FIG. 2 is a conventional rolling apparatus. 
     FIG. 3 is a front view assembly drawing of the present invention. 
     FIG. 4 is a top view assembly drawing of the present invention. 
     FIG. 5 is a side view assembly drawing of the present invention. 
     FIG. 6 is an input clamp apparatus fixing mechanism assembly drawing of the present invention. 
     FIG. 7 is a transmission mechanism assembly drawing of the present invention. 
     FIG. 8 is a cutting blade and chamfering blade assembly drawing of the cutting mechanism of the present invention. 
     FIG. 9 is a main table assembly drawing of the present invention. 
     FIG. 10 is a table and cuttings collector assembly drawing of the present invention. 
     FIG. 11 is an output clamp apparatus fixing mechanism assembly drawing of the present invention. 
     FIG. 12 is an input V shape roll wheel assembly drawing of the present invention. 
     FIG. 13 is a schematic drawing showing the automatic operation procedure of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to the attached drawings, the cutting skill contents of the novel means of the hard pipe cutting equipment are disclosed as follows: 
     Adjust variable frequency driving motor  51  of the present invention according to the diameter, thickness, and wanted chamfering depth of the produced hard pipe  21  which is led by the preceding leading device; and control the cutting slide seat fixing rotating disc  31  at an appropriate rotation rate. Then, adjust the position of the cutting blade sliding seat  33  and the chamfering blade sliding seat  34  to coordinate with the successive multiple-unloading frame  69  so as to do spacing cut and multiple-unloading outlet. 
     FIG. 3, which is a front view assembly drawing of the present invention, shows the hard pipe  21  is led by the front end input V shape leading wheel  22  into cutting operation. The hard pipe is held steadily by the input clamp apparatus fixing mechanism (FIG. 6) and the output clamp apparatus fixing mechanism (FIG. 10) so as to prevent any bias from happening. Meanwhile, the hard pipe consecutively enters into cutting mechanism (FIG.  7 ), transmission mechanism (FIG.  8 ), main table (FIG.  9 ), output clamp apparatus mechanism, output V shape leading plate, leading wheel; until the hard pipe reaches the multiple-unloading frame  69  of the rear end and touches the limit switch  70  to release a start signal of spacing cut and to initiate the circuit control system  68  to coordinate with the production rate of production line. Said mechanisms form an automatic equipment which is able to fix, to cut, to chamfer, which sufficiently improve the efficiency. In addition, the overall cutting operation is executed in a close space (safety shield  53 ); cuttings produced from turning are collected by the cuttings collector  55  through the cuttings collecting wind shield  54 ; whereby said hard pipe cutting equipment meets the requirement of environmental protection of being clean and noiseless. 
     FIG.  4  and FIG. 5 are top view assembly drawing and side view assembly drawing of the present invention. The assembly structure of the present invention is that both sides of the table  67  are fitted with the main table supporting roll wheel  66  and the base plate  71  which is used to connect and fix each mechanism. The function of the base plate is to combine the input clamp apparatus mechanism (FIG.  6 ), the transmission mechanism (FIG.  7 ), cutting mechanism (FIG.  8 ), the main table (FIG.  9 ), the table and the cuttings collector (FIG.  10 ), the output clamp apparatus fixing mechanism (FIG.  11 ); the purpose of-which is to have the main table supporting roll wheel  66  go forward and return in accordance with the production rate of the production line. 
     FIG. 6 is an assembly drawing of the input clamp apparatus fixing mechanism of the present invention, wherein the input clamp apparatus fixing seat  24  combines the odd-numbered input clamp apparatus sliding track  25 , the input clamp apparatus sliding seat  26 , the input clamp apparatus  27  and the input clamp apparatus drive rotating disc  29 , and the input clamp apparatus driving cylinder  28 . The input clamp apparatus driving cylinder  28  drives the input clamp apparatus drive rotating disc  29  to drive several input clamp apparatus drive rolling wheels  30  to further drive the input clamp apparatus sliding seat  26  and the input clamp apparatus  27  to hold the hard pipe  21 , the function of which is that both the hard pipe  21  and the cutting sliding seat fixing rotating disk  31  are concentric while cutting and no problems such as bias and displacement will happen, i.e., the function of which is positioning. A plurality of clamp apparatus  27  simultaneously hold the hard pipe  21  so as to increase the holding capability and to maintain concentric situation in order to refrain the hard pipe  21  from deforming and displacement; consequently, this increases the cutting quality, which constitutes the characteristics of the present invention. 
     FIG. 7 is the transmission mechanism assembly drawing of the present invention. The transmission mechanism mainly combines the variable frequency driving motor  51  which operates to drive the bottom gear sprocket  50 , the chain  49 , and the top gear sprocket  48 , wherein the top gear sprocket  48  combines and rotates harmoniously with the rotation axle center  52  which is hid in the main table (FIG.  8 ). Meanwhile, the blade-feeding cylinder  43  at both sides starts, in accordance with the operation of the variable frequency driving motor  51  and with the movement of the bottom plate  71 , to drive the blade-feeding roll wheel  42  to push the blade-feeding pushing rotating disc  41  to move forward; at the same time, the twin-slope blade-feeding guide block  40  fitted thereon moves forward accordingly; and the twin-slope blade-feeding guide block  40  which is inserted in the cutting slide seat fix rotating disc  31  rotates accordingly. 
     FIG. 8 is an assembly drawing of the cutting blade, and the chamfering blade of the present invention. While the transmission mechanism (FIG. 7) operates, the blade-feeding pushing rotating disc  41  rotates accordingly; this further drive two sets of twin-slope blade-feed guide block  40  to penetrate through the cutting slide seat fix rotating disc  31  which has two stripe shape grooves. Moreover, the cutting slide seat fix rotating disc  31  is fitted with the cutting blade and the chamfering blade, wherein the cutting blade is assembled with a sliding track  32 , a cutting blade sliding seat  33 , a cutting blade seat  37 , and a replaceable cutting blade  35 . The chamfering blade is assembled with a sliding track  32 , a chamfering blade sliding seat  34 , a chamfering blade seat  38 , and a replaceable chamfering blade  36 . The grooves in both the cutting blade sliding seat  33  and the chamfering blade sliding seat  34  are fitted with a driving roll wheel  39  which is also fitted in the groove, which has different slope, of the twin-slope blade-feeding guide block  40 . While the blade-feeding cylinder  43  pushes forward, the blade-feeding roll wheel  42  pushes the blade-feeding pushing rotating disc  41  to move forward; and the twin-slope blade-feeding guide block  40  fitted thereon drives the driving roll wheel  39  to move forward to the center of the main table (FIG.  9 ), which also drives the cutting blade sliding seat  33  and the chamfering blade sliding seat  34  to move to the center of the main table (FIG.  9 ); the cutting and chamfering operations are accomplished during the movement, which constitutes the characteristics of the present invention. 
     FIG. 9 is an assembly drawing of the main table of the present invention. While the transmission mechanism (FIG. 7) operates, the bottom gear sprocket  50  is driven to rotate; the chain  49 , and the top gear sprocket  48  are connected to the rotation axle center  52  which is hid in the main table (FIG.  9 ); and the cutting sliding seat fix rotating disc  31  and the blade-feeding pushing rotating disc  41  are all fixed to and linking-up with the rotation axle center  52 , which assemble to the main table. 
     FIG. 10 is an assembly drawing of the table and the cuttings collector of the present invention. The cuttings produced from turning are collected by the cuttings collector  55  which is connected to the cuttings collecting wind shield  54  installed below the bottom plate  71 . The cuttings do not fall down to the floor since the overall cutting operation takes place in a closed space (safety shield  53 ); besides, all the cuttings are collected by the cuttings collector  55 . In addition, the turning operation of the cutting blade and the chamfering blade will not produce dust, which is an extra advantage for pollution control. 
     FIG. 11 is an assembly drawing of the output clamp apparatus fixing mechanism of the present invention, which comprises an output clamp apparatus fixing seat  56 , a plurality of output clamp apparatus sliding track  57 , an output clamp apparatus sliding seat  58 , an output clamp apparatus  59 , an output clamp apparatus drive rotating disc  61 , and an output clamp apparatus driving cylinder  60 . The output clamp apparatus driving cylinder  60  drives the output clamp apparatus drive rotating disc  61  to further drive a plurality of output clamp apparatus driving roll wheels  62  to further drive the output clamp apparatus sliding seat  58  and the output clamp apparatus  59  to hold the hard pipe  21 , the function of which is that both the hard pipe  21  and the main table (FIG. 9) are concentric while cutting and no problems such as bias and displacement will happen, i.e., the function of which is positioning. A plurality of longer output clamp apparatus  59  simultaneously hold the hard pipe  21  at several different points to shorten the distance between holding points and turning positions so as to improve the holding capability and the cutting quality, which constitutes the characteristics of the present invention. 
     FIG. 12 is an assembly drawing of the input V shape rolling wheel of the present invention, which comprises an input V shape leading wheel and an input V shape leading wheel fixing seat. The function is to-prevent the hard pipe  21 , while being input of being cut, from colliding with the input clamp apparatus fixing mechanism (FIG. 5) and with the replaceable cutting blade and the chamfering blade fitted to the cutting sliding seat fix rotating disc  31 ; the blade may be damaged otherwise. 
     EXAMPLE 1 
     While it is intended to produce a two inches hard pipe, the two inches hard pipe is led first by a leading machine at the previous stage; then, the hard pipe goes through the front-end input V shape leading wheel, the input clamp apparatus fixing mechanism, the transmission mechanism, the cutting mechanism, the main table, the output clamp apparatus fixing mechanism, the output V shape leading plate, the leading wheel, finally reaches the multiple-unloading frame at the rear stage and touches the limit switch for spacing and cutting so as to initiate the electric control system for cutting, meanwhile the input clamp apparatus fixing mechanism and the output clamp apparatus fixing mechanism operate to hold the hard pipe, and to initiate the variable frequency driving motor to operate; the blade-feeding cylinder drives the blade-feeding roll wheel according to the preset input so as to push the blade-feeding pushing rotating disc move forward to further drive the twin-slope blade-feeding guiding block. Thereafter, the cutting blade acts cutting and chamfering on the hard pipe according to the preset input. Meanwhile, the cutting table moves on the table in accordance with the production rate of the hard pipe, and the cuttings collector collects the cuttings by using cuttings collecting wind shield, which conclude the overall cutting operation of the hard pipe. 
     EXAMPLE 2 
     While it is intended to produce an eight inches hard pipe, the eight inches hard pipe is led first by a leading machine at the previous stage; then, the hard pipe goes through the front-end input V shape leading wheel, the input clamp apparatus fixing mechanism, the transmission mechanism, the cutting mechanism, the main table, the output clamp apparatus fixing mechanism, the output V shape leading plate, the leading wheel, finally reaches the multiple-unloading frame at the rear stage and touches the limit switch for spacing and cutting so as to initiate the electric control system for cutting, meanwhile the input clamp apparatus fixing mechanism and the output clamp apparatus fixing mechanism operate to hold the hard pipe, and to initiate the variable frequency driving motor to operate; the blade-feeding cylinder drives the blade-feeding roll wheel according to the preset input so as to push the blade-feeding pushing rotating disc move forward to further drive the twin-slope blade-feeding guiding block. Thereafter, the cutting blade acts cutting and chamfering on the hard pipe according to the preset input. Meanwhile, the cutting table moves on the table in accordance with the production rate of the hard pipe, and the cuttings collector collects the cuttings by using cuttings collecting wind shield, which conclude the overall cutting operation of the hard pipe. 
     To summarize what is said above, the skills utilized by the present invention is totally different from those of the conventional ones. The automatic design of the present invention tremendously increases the efficiency of hard pipe cutting. The cutting and chamfering operation can be done simultaneously. The operating environment is as clean as not to jeopardize the operators. The present invention is patentable due to its novelty.