PRESS WITH A BOX FRAME

Abstract: A press with a box frame and an arbitrary hydraulic-, me­ chanical- or other drive, said frame consisting of two parts and preferably symmetrical and forming after connection a closed box provided with holes enabling an access to the pressing plate of the press. The parting plane of both parts of the frame is parallel to a direction (6) of the working motion of a press slide (7). The slide (7) in a form of a box is slidably mounted in guides (10) fixed to the inner surfaces of parts of the press frame. Guides (10) and possibly an upper plate (13) are at the same time elements connecting both parts of the press frame. In the parting plane of parts and of the press frame there are grooves (8) with slats (9) protecting against mutual displace­ ment of parts of the frame in the parting plane.

Description: press with a box frame The subject of the present invention is a press with a box frame having hydraulic-, mechanicalor other drive, which can be applied for various technological purposes, especially for plastic working. Those skilled in the art know presses with a fra- me supporting structure, being a further progress in the design of previously applied C-frame presses. As compared with the latter, presses with a frame supporting structure enable a considerable increase of rigidity of the frame and rigid guidance of the press slide, which in C-frame presses was supported from two sides, whereas in presses with a frame supporting structure - from four sides. A substantial disadvantage of the known frame structures, however, was the necessity of applying correspondingly big assembling windows enabling introduction of the slide and the driving mechanism to the inside of the press frame, as well as difficulties associated with the treatment of surfaces fdr guides of the inner part of the press frame. For this reason presses with s frame design are most often equipped with guides of the press slide situated in its corners due to which the contact surface of slide guides is considerably limited.. In order to eliminate perial- ly these inconveni.ences, in. presses having a frame design roll - lateral guides have been applied, which, however, for the reason. of the quantity of transferred pressures, have not given positiv.e re- sults because of a too small contact surface of guiding elements. A particular inconvenience has been shown by presses with a frame supporting structure at the spplication of hydraulic drives. Namely, for the reason of assembling difficulties the hydreulic drive is mounted outside the press frame, most often.on its top, and is attached to the said frame by means of screws, the said screws transferring forces coming from the main pressure of the press. In order to eliminate partially these disadvanta- ges presses of a box - column design have been. introduced, known, for example, from the Polish pe- tent no. 70013. The frame of such a frame consists of e box open at one side and a flat closing plate connected thereto, whereby the driving mechanism can. be situated both in the box and in the closing plate. Presses of this type are characte- rized by increased rigidity and an essy access to the working space of the press, however, in resuit. of the fact that the parting planes of elements of the supporting unit of the press are perpendicular to the working direction of the press slide the connecting elements, usually screws, transfer forces resulting from the working pressure of the press. Transfer of pressure forces occurs in all parting planes of both the frame and the drive of the frame. The task of the present. invention i:s to eliminate the mentioned disadvantages of hitherto known presses of the frame- or.box-columL design of the supporting unit and to create such a design of ths press, which on one hand will enables high rigidity of the supporting unit, and on the other hand will enable an improvement of conditions of guiding the slide inside the frame by increasing the contact surface of guides. This tesk has been rea- lised according to the invention by an application of a frame consisting of two preferably symmetrical parts which after assembling form a closad box provided with windows enabling an acces to the working spece of the press, the parting plane of the. said box being parallel to the direction of movement of the press slide. Due to this elements connecting both parts of the frame do not transfer forces originating from the main pressure of the press Besides, the design of this type enables an. access to the interior of the fre mei in s dismounted state in order to perform a treatment of surfaces and to fix guides of the press slide. Due to the division of the frame in the plane parallel to the direction of the working motion of the slide there is a possibility of mounting the slide and possibly the driving me chanism on the side before connecting both parts of the press which after connection form a clo sed box. In result of this the length of the slide is not like in the hitherto known designs of presses reatricted by assembly reasons or the si- ze of assembling windows. Thus, in:the press ac cording to the invention the necessity has been avoided of increasing the height and the transverse dimensions of the press frame for the reasons of assembling the slide, due to which it has been possible to attain not only a reduction of dimensions and weights of the press frame but also a considerable increase of its rigidity in com- parison with the hitherto known designs. The invention is explained by way of example in the attached drawing in which fizzy presents the press with a split frame in a perspective projec tion, fig.2 presents the same press in o schema tic-vertical section with a plane CC, fig*) - one of tha two parts of these frames of the presses in the view from the centre, fig*4 - the same part of the press frame in a section along the linb DD-(fig.3), and fig.5 - the press in a schematic cross-section along the line At: (fig.27 and fig.6 - the press in a schematic cross-section BB (fig.2). The frame of the press according to the invention consists of two parts 1 and 2 preferably symme trical and forming after connection a closed box (fig,l) provided with holes 4, 5 enabling an access to the working space of the press, the parting plahe 3 ofboth parts l and 2 being parallel to the directLon 6 of thS working motion of the press slide 7. In the parting plane! 3 both parts 1 and 2 are provided with grooves 8 in which slats 9 protecting against. mutual displacement of both parts I and 2 in the parting plane 3 are situated. Inside both parts I and 2 of the frame flat guides 10 are fixed which. serve for guiding the slide 7 of the press, whereby as opposed to the hitherto known designs the slide is guided along side surfaces and not on corners. At the top the slide 7 is connected with a plate 11. serving for fixing tools and provided with a discharging hole 12 serving for discharge of rely details and wastes from the inside of the press. At the. opposite! side to the plate 11 a plate 13 is fixed to parts 1 and 2, serving for fixing the upper part.of s tool. A guide 10a of the slide 7 covering the parting plane 3 of both parts 1 and 2 of the frame and the upper tool plate 13 are at the same time elements connec.ting both parts 1 and 2 of the press fra me, whereby the said elements do not transfer forces coming from the main pressure. The slide 7 is preferably provided in corners with bevels 14 enabling a corresponding thickening of corners 15 of parts 1 and 2 of the press frame, and due to this, correspondingly, an increase of rigidity of the said frame and advantageous transfer of loads scting om the said frame. The press according to the invention is mounted so that to part 1 of the frame guides 10 and of the slide 7 are fixed, and then the tool plate 15 and in part 1 the slide 7 is mounted together with the press drive which is not shown, and then the frame. together with. the mounted slide and the drive is closed by the other part 2 of the frame fixed by means of pins and screws situated in guides 10 and the plate 13. The press according to the invention can be applied both as e press with hydraulic drive, mechanical drive and other.

Claims: What is claimed is: 1. A press with a box frame, characterized in that its frame consists of two similar parts 1 and 2 preferably symmetrical to 8 parting plane 3 pa roller to a direction; 6 of the working motion of a press slide 7, forming after connection a clo sed box provided with holes 4 and 5. enabling an access to the working space of the press. 2. A press according to claim 1, characterized in that to inner surfaces of its parts 1 and 2 of the frame guides 10, 10e of the slide 7 and a tool plate 13 are fixed, guides 10 and the plate 13 being at the seme time elements connecting both parts 1 and 2 of the frame. 3. A press according to claims 1 and 2, cherecteri- zed in that the slide 7 in a form of a box open at one side is provided in corners with bevels 14, and corners of parts 1 and 2 of the frame are provided with corresponding thickenings 15. 4. A press according to claim 1, characterized in. that parts 1 and 2 of the frame are provided in the parting plane 13 with grooves 8 enclosing slats 9.

Inventors: NOWAK, EDMUND
Applicants: OSRODEK BADAWCZO-ROZWOJOWY PODSTAW TECHNOLOGII I KONSTRUKCJI MASZYN
Application year: 1983
Main classification: B30B9
IPC codes: B30B15