SU1279761A1 - Die for cutting bar stock - Google Patents

Abstract

The invention relates to the processing of metals by pressure, namely to dies for cutting bar material, mainly aluminum, into short blanks with a clean cut. The invention makes it possible to improve the quality of the blanks due to the fact that a shift is formed only in the area of the cutting edge of the knife. A stamp for cutting short billets from an aluminum bar contains a cutting sleeve 1, an emphasis 2, a movable knife 3 with a pusher angle p equal to 25-45, having a front surface 4. The stop 2 is made adjustable and movable, the supporting surface 5 of which is parallel to the front surface 4 of the rolling 3. The stroke of the stop 2 is adjusted by the screw 8. The cut and calibrated workpiece is kept from locking with clamps. 1 3.p. f-ly, 3 ill. (L to co od

Description

The invention relates to the processing of metals by pressure and can be used in the blank production of machine-building enterprises for cutting bar material.

The aim of the invention is to improve the quality of the obtained blanks when cutting aluminum rods.

FIG. 1 schematically shows a stamp for cutting bar material in cutting, general view, initial position; in FIG. 2 - the same, in the calibration position of the cut piece; in fig. 3 is a section A-A in FIG.

A stamp for cutting bar material contains a cutting sleeve 1, an emphasis 2, a movable knife 3 with a cusp angle y9 equal to 25-45 °, having a front surface 4. An emphasis 2 with a supporting surface 5 is elastically connected through a buffer 6 with screws 7 to the movable knife 3 The stroke of the stop 2 is adjusted by the screw 8. The locking pins 9 and 10 of the workpiece are fixed on the stop 2. The stop 2 and the knife 3 are elements of the calibration mechanism of the cut blank, which is calibrated by their surfaces 5 and 4.

The stamp works as follows.

The bar to be cut 11 is fed in the axial direction up to the stop 2. When the knife 3, which has a taper angle | 3 of 25-45 °, moves, the workpiece 12 is bent down by the front surface 4 of the knife 3 until it stops at the bearing surface 5 of the stop 2, which prevents Scroll the workpiece: 12 into the tube. The stop 2 together with the movable knife 3 moves down and rests against the adjustable movable screw 8. At the same time, the buffer 6 is compressed and the cut billet is finally calibrated between the front surface 4 of the foot 3 and the support surface 5 of the stop 2. During the course

th knife 3 up stop 2 is in its original position. The calibrated preform 12 is kept from falling out by the clips 9 and 10 and is removed from the die working zone by the next cut preform during the next course.

Claims (2)

The invention relates to the processing of metals by pressure and can be used in the blanking production of machine-building enterprises for cutting bar stock. The aim of the invention is to improve the quality of the obtained blanks when cutting aluminum rods. FIG. 1 schematically shows a stamp for cutting bar material in cutting, general view, initial position; in FIG. 2 - the same in the calibration position of the cut piece; in fig. 3 is a section A-A in FIG. 1; A punch for cutting a bar material contains a cutting sleeve 1, an emphasis 2, a movable knife 3 with a point angle u9 equal to 25-45 °, having a front surface 4. An emphasis 2 with a supporting surface 5 is elastic connected via buffer 6 by screws 7 with movable knife 3. The stroke of stop 2 is adjusted by screw 8. Clamps 9 and 10 of the workpiece are fixed on stop 2. Stop 2 and knife 3 are elements of the calibration mechanism of the cut-up blank, which is calibrated by their surfaces 5 and 4. The stamp works as follows. The cut bar 11 is fed into the core. in the direction of the stop 2. When the knife 3, which has an angle of 25–45 °, is cut, the workpiece 12 is bent down with the front surface 4 of the knife 3 until it stops the support surface 5 of the stop 2, which prevents the workpiece from curling: 12 pipe. The stop 2 together with the movable knife 3 moves down and rests against the adjustable movable screw 8. At the same time, the buffer 6 is compressed and the final calibration of the cut billet takes place between the front surface 4 of the leg 3 and the reference surface 5 of the stop 2. During the course of the movable knife 3 up stop 2 is in its original position. The calibrated preform 12 is prevented from falling out by the clips 9 and 10 and is removed from the working area of the punch with the next cut procurement during the next turn. The formula was invented and a Stamp for cutting bar material, mainly aluminum, containing a bottom plate with a fixed stub knife, a back plate with a movable knife, an emphasis and a calibration mechanism for cutting the cut piece in the form of a movable and fixed element with flat parallel to one another working surfaces, distinguished by that, in order to improve the quality of the workpieces, the bottom plate is provided with a stop element, a movable knife in cross section passing through the axis of the stationary sleeve knife and the direction of Inserting a cutting force, is made in the form of a one-sided wedge with a wedge apex of 25-45 °, the movable element of the calibration mechanism of the cut billet is made in the form of a U-shaped bracket fixed on the top plate by means of buffers that can interact with the stop element of the bottom plate, and the surface of the moving element of the calibration mechanism of the cut-off workpiece is located in the middle part of the U-shaped bracket parallel to the wedge surface of the movable knife, while the fixed element of the calibration mechanism is about Reza workpiece aligned with the wedge surface of the movable blade and the fence la vsholnen U-shaped bracket. 2. A stamp pop, 1, characterized in that the calibration mechanism of the cut-off workpiece is provided with clamps of the position of the workpiece fixed on the i-shaped bracket.