SU856620A1 - Die for drawing box-shaped part angles - Google Patents

Description

I

The invention relates to the processing of meta-HVA with a pressure, in particular to universal dies for modified stamping.

A stamp is known for drawing a large-set of 41 thin-walled elliptical bottoms containing a punch, a conical clamp and a die with a conical clamping surface 1.

The disadvantage of such a device is that the closed form of the die and the punch allows only products of a given size to be pulled.

The closest in technical essence and the achieved result to the invention is a punch for drawing out the corners of box-like parts containing a matrix installed on the upper movable plate, a clamp, a punch located on the lower plate, and a fixing unit of the workpiece on the punch 2.

However, when using this stamp, the quality of the parts produced is not high enough due to the absence of a clamp-holder and there is an inconvenience in operation associated with the installation of the workpiece between the fixing unit and the punch and the need to manually feed and retract the workpiece.

The purpose of the invention is to improve the quality of manufactured parts and serviceability.

Claims (2)

This goal is achieved by the fact that the die for drawing the corners of the box-like parts, containing the matrix, the clamp, the punch located on the bottom plate, and the workpiece fixing unit on the punch, installed on the upper movable plate, is provided with an additional clamp with a conical working section installed under the matrix and spring-loaded to the | last plate, the fixing unit of the workpiece on the punch is made in the form of vertical tshanok mounted on the top plate, arranged parallel to the side of the punch surface, the clamp is installed between these sections. on the top plate by means of elastic elements, the punch is connected with the bottom plate with the possibility of axial movement under the action of the pressure, and the matrix is attached to the pressure cone section. In addition, the gap between the vertical strips and the side surface of the punch composition 38. Tflet 0,9-0,95 tolidine billet, while the side surface of the punch is made with notch. FIG. 1 shows the proposed stamp, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. 2. The stamp contains a bottom plate 1 on which a punch 2 is mounted, having guides 3 for moving in a vertical direction and spring-loaded springs 4, as well as a conical clamp 5 connected to a buffer device 6 through pushers 7 On plate 1 there are also installed a porous plate 8 to limit the stroke of the punch 2 and the anti-crimp 9 --11. In the upper 12 stamps, the matrix and and the vertical clamping strips 14 are fixed. Between them, the clamp 15, held by the screws 16 and the spring-loaded spring w 17, which are much stronger than the springs 4, is mounted with vertical movement. On the side surface of the punch 2 there is an elliptical section 18 and at lateral vertical sections 19 with notched parallel to the slats 14 which grip towards it. The gap between the flat sections 19 of the punch-2 and the vertical clamping slats 14 is 0.9-0.95 of the thickness of the workpiece, which prevents the transmission of the deformation of the material that occurs when the angle is stretched on the side of the wall KOBi .ie; The working surface of the matrix 13 consists of a pressure cone section 20, which passes into a cylindrical draw section 21. The stamp works as follows. A blank 22 is installed on the punch 2 dpom up. When the press slide (not shown) is lowered with the upper plate 12 of the punch fixed 15, the clamp 15 and the clamping plates 14 press the billet 22 to the punch 2. Then, as a result of the pressing 1 on the punch 2. Springs 4 are compressed, and the conical section 20 of the matrix 13 and the conical clamp 5 are straight (flatten out) the corner section 331 of the sweep 22. With the further lowering of the 1PH, the punch 2 upravs into the support plate 8 and stop 1P} a1c, the buffer adaptation 6 and the springs 17 are compressed, and the angular the plot of the workpiece 22, skolz Between the die 13 and the conical clamp 5, wraps around the cylindrical section 18 of the punch 2. With the lifting of the top plate, all the parts of the punch return to their original position, and the workpiece is removed. The stamp can be used for manufacturing box-shaped products of any dimensions, not only quadrangular, but also polygonal, high quality and good appearance. The formula of the invention 1. A die for drawing out the corners of box-shaped parts containing a die mounted on the upper movable plate, a clamp, a punch located on the lower plate, and a fixing unit of the workpiece on the punch, characterized in that, in order to improve the quality, service, it is equipped with an additional clamp with a conical working area installed under the matrix and spring-loaded to the bottom plate, the fixing unit of the workpiece on the punch is made in the form of vertical strips attached to the top plate, located parallel to the side noBepxfiocTH punch, the clamp is installed between these strips on the top plate by means of elastic elastics, the punch is connected to the bottom plate with the possibility of axial movement under the action of the press1, and the matrix is made with a pressure cone section. 2. A stamp according to claim 1, wherein the gap between the vertical plates and the side surface of the punch is 0.9-0.95 of the thickness of the workpiece, and the side surface of the punch is notched . Sources of information taken into consideration (later in the examination 1. Author's Certificate TCP N 460093, class B 21 D 22/02, 25.04.72. 2. USSR author's certificate for application number 2754518, cl. B 21 D 2.:.02, 13.04.79 (prototype). TPTT. Iqj FIG. I // Ф «/ г7 BudA. S I // J5