SU1512696A1 - Universal die for cutting slots - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to devices for punching grooves, preferably in the corners and flat parts of sheet material. The purpose of the invention is the expansion of technological capabilities, increased productivity and reliability of the stamp. The punch is made of pivotal sectors, which are pairwise associated with the corresponding sectors of the matrix. This provides simultaneous installation of a given cut-out angle. The cutting edges of the punches are placed on the protrusions that are made on the working end of the punch. 1 hp ff, 4 ill.

Description

The invention relates to the processing of metals by pressure, in particular to devices for punching grooves, mainly in the corners and flat parts of sheet material.

The purpose of the invention is the expansion of technological capabilities, increased productivity and reliability of the stamp.

FIG. 1 shows the proposed stamp, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 is a view B in FIG. one; in fig. 4 shows a section B-B in FIG. 2

The stamp contains a ring-shaped holder 1 of annular form, rigidly fixed to the bottom plate with 2 screws, matrix sector 3, connected in pairs with the help of sleeves 4 and guided 5 with semi-pans 6, made in the form of sectors and mounted in an annular punch holder 7 fixed to the upper plate 8 with screws.

On the support surface of the bottom plate 2 there is an adjustable stop 9, and on the half pans 6 - clamps 10. The cutting edges of the half pans are made on the projections 11.

The stamp works as follows.

The corner or sheet blank is placed on the supporting surface of the matrix sectors 3 and is brought to contact with the stops 9 (side stop). When the press is turned on, the clamps 10, moving down, are in contact with the workpiece, they are pressed against the matrix sectors 3, and with further movement of the press ram, the half-pans 6 cut the groove. In order to reduce the cutting force and increase the reliability, the cutting edge of the punch is made obliquely with rising to the top of the corner cut by the groove.

The angle of the groove being cut is adjusted by synchronous movement.

sd y

ABOUT)

with

05

(reversal) of matrix sectors and associated half-punches with their subsequent fixation in the established position.

The use of the proposed stamp allows to expand the technological capabilities and versatility of the stamp, as well as the readjustment time due to the adjustment of the cut grooves by the pairwise displacement of interconnected semi-matrixes and half-punches, increases productivity.

Claims (2)

1. A universal die for cutting grooves in the corner shelves of sheet blanks, containing upper and lower plates, ring die holders and punch holder, a matrix consisting of sector sections installed with the possibility of relative rotation with the formation of a working point, characterized in that In order to expand technological capabilities and increase productivity, the punch is made of sector sections according to the number of sections of the die, each section of the punch is associated with its corresponding section of the die guides, This section of the punch and die are made in terms of equidistant form the working end of the punch is formed stepwise. 2. A stamp in accordance with claim 1, characterized by t & s that, in order to increase reliability, the cutting edges of the punch are made inclined. 1 Busa Cutting KpOfiKu srig.2 VIZ B Cutting Edge L fig.Z Zershina Resch / (pOM / fUg, g eleven FIG.