SU848124A1 - Die for undercutting and bending undercut portions of sheet materials - Google Patents

Description

one

The invention relates to the processing of pressure metals and can be used to manufacture heat exchangers, in particular, radiators for cooling semiconductor devices.

A known stamp for cutting and bending the notched sections of sheet material, containing two multi-blade tools, the blades of which are installed in a step with the possibility of pairwise interaction with each other, are limited to flat and profiled surfaces and are equipped with cutting edges lying at the intersection of these surfaces tij.

A disadvantage of the known piece of equipment is that it is impossible for it to twist the incised sections of material.

The purpose of the invention is to twist the incised sections, in particular, to obtain semiconductor cooling radiators.

The goal is achieved by the fact that the stamp for cutting and bending the notched sections of sheet material, containing two multi-blade tools, the blades of which

installed at a predetermined pitch with the possibility of pairwise interaction with each other, the pitch between adjacent pairs of blades is equal to the sum of the thicknesses of the blades constituting the pair, and the thickness of the material being cut, and one of the cutting faces of each blade is made with a sloping section located in a plane, perpendicular to the plane Edge of the blade.

In addition, the cutting edges of each pair of blades are inclined and inclined relative to each other in opposite directions.

15

FIG. 1 isobrigiken proposed stamp, general view; in fig. 2 - the same, with the top plate removed, top view; in fig. 3 - workpiece and tool at the beginning of the cutting process; on

20 of FIG. 4 - the same at the end of the cutting process; in fig. 5 is the same at the end of the twisting process; in fig. 6 - view of the twisted areas at their base; in fig. 7 - multi-blade insulants, axonometrics; in fig. 8, view A in FIG. 7; in fig. 9 is a view B in FIG. eight; in fig. 10 — view B on, FIG. eight; in fig. 11 - notched and unbent sections of the material, axon 30 metri.

 contains upper 1 and lower 2 plates, a wedge 3, holders 4 with blades 5 and bevels 6, direction 7 and latch 8 parts. The knives made the angle of sharpening fli, the angle of the shutter and the angle ot. . The cozed blade is bounded by petals and the forming profiled and flat surfaces forming the cutting edge. The cutting edges of each pair of blades are located obliquely, pasted one relative to the other in opposite directions.

The stamp works as follows. The workpiece is installed in the retainer 8. When the upper plate 1 moves down the wedge 3, acting on the bevels of the clips 4, the blades 5 are moved. The blades are returned to the initial position by springs (not shown). With the approach of the blades 5, the material is cut (Fig. 3) and the sections are simultaneously rotated (Fig. 4). Upon further movement of the blades, the incised area is rotated (FIG. 5). The ct angles, made at the ends of the blades facing the base of the bent elements, allow the notched section to unfold smoothly along a helical surface of a relatively flat workpiece. The length of the helix section may vary depending on the angle, cL.

Claims (2)

1. A cutter for notching and bending the notched sections of sheet material containing two multi-blade tools, the blades of which are installed with a predetermined pitch with the possibility of pairwise interaction with each other, are limited to flat and profile surfaces and are equipped with. cutting edges lying at the intersection of these surfaces, characterized in that, in order to twist the incised sections, in particular to obtain semiconductor cooling radiators, the pitch between the pairs of blades is equal to the sum of the thicknesses of the blades constituting the pair and the thickness of the material being processed, and one made from cutting edges of each blade with an inclined section located in a plane perpendicular to the flat edge of the blade. 2. A stamp according to claim 1, characterized in that the cutting edges of each pair of blades are obliquely and inclined relative to each other in opposite directions. Sources of information taken into account in the examination 1. Meshcherin V.T. Sheet stamping. Scheme Atlas, M., Mechanical Engineering 1975, p. 144, FIG. 454, Rmg.Z Phew L / MA -uppy FIG. W