SU1368069A1 - Die for trimming the edges of hollow parts - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used for trimming edges at the end of hollow parts obtained by drawing from sheet metal. The aim of the invention is to improve the quality of the parts produced by increasing the quality of the cut. Cutting part 13 is placed in working window of matrix (M) 8. When M 8 is lowered, the inclined surface D of the wedge drive 7 contacts the inclined surface B of the composite punch 2. Thus, the cutting edges B are moved and the edge of the cut part 13, M 8 is cut the knob 11 is rotated about the axis of the stamp. Then the cycle of operation is repeated. The simplicity of the wedge drive simplifies the construction of the stamp as a whole. 2 Il. with

Description

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The invention relates to mechanical engineering and can be used for trimming edges at the end of hollow parts obtained by drawing from sheet metal, for example, of round, square shape, etc.

The aim of the invention is to improve the quality of the parts produced by improving the quality of the cut.

FIG. 1 shows a stamp for trimming the edges of hollow parts, a slit; in fig. 2 is a section A-A in FIG. one.

The stamp contains a plate 1 movable from a press slide (not shown) with springs 3 placed on it with the possibility of radial movement of the composite punch 2 (two or more), spring-loaded to the stamp axis 3. Through the punch 2, a template 4 is connected to plate 1 spring-loaded ejector 5 o

The bottom plate 6 is fastened to the table with a wedge-drive 7 fixed on it and having an inclined surface D. In the cavity of the drive-wedge 7 made cylindrical, the matrix 8 is placed with the possibility of rotation around its axis, spring-loaded through the gasket 9 and spring material 10. bottom plate 6. Through the side window of the wedge 7 with the matrix 8, to ensure rotation of the matrix 8 around the axis, a handle 11 is connected at a certain angle. Cutting piece 13 is mounted to the working window of the matrix 8 on the spring material 12 (plane B ) on the contour the working window to a width -prevppayuschuyu displacement of a trim edge 13 when trimming is configured obnizhe- the amount of Z along the plane V, is decoupling cutting.

Composite punch 2 consists of. two or more knives, each of which has an inclined surface D for contact with the inclined surface D of the wedge drive 7, an E stop-plane for contacting and moving the matrix 8 (plane B) through the mirror and the cutting plane B moving under the cutting plane B of the matrix 8 with Zo clearance

The stamp works as follows.

The workpiece 13 is set in the working window of the matrix 8. The upper part of the stamp is lowered, the spring material 12 presses the trimmed part 13 against the template 14, the thrust plane E of the composite punch 2 presses against the plane B of the matrix 8

and with the force of the spring material 10, the matrix 8 is lowered down. Upon further lowering of the matrix 8, the inclined surface D of the wedge drive 7 is in contact with the inclined surface G

composite, punch 2, moves its cutting planes B, notching - 1 the edges of the trimmed part 13, in two or more places, in total overlapping half of the contour

 cut part 13. The upper part of the stamp returns to its original position, while the ejector 5 retains the cut part 13 in the working window of the matrix 8.,

The matrix 8, together with the cut-off part 13, is rotated relative to the die in the drive-wedge 7 cavity by a certain angle, for example for a square box-like part 90.

The cycle of the stamp is repeated, the remaining part of the edge is cut off, and when the upper part of the stamp returns to its original position, the cut edges are removed, and the cut-off part 13 is removed from the window of the matrix 8.

When trimming round hollow parts, the composite core 2, consisting of

the three knives, the rim is obtained in the form of a ring and is removed from the cavity of the matrix 8 simultaneously with the finished part 13. For trimming the hollow box-shaped square-shaped parts, the punch 2 consists of deuh blades.

F o rm ula invention

A stamp for trimming the edges of hollow parts, containing working tools mounted on the movable and fixed parts — a matrix and a punch, made in the form of knives, mounted to move in a direction perpendicular to the pressure axis of the stamp, and drive knives, mounted to movement in the direction perpendicular to the pressure axis of the punch, and the drive of the knives, characterized in that, in order to improve the quality of the parts obtained by increasing the quality of the cut, it is equipped with a device for rotating one and s working inst

In relation to the punch axis, the knives are made in the form of at least two sectors installed with the possibility of moving in the radial direction along the plane of contact between the punch and the die.

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2

Claims (1)

Claim A stamp for trimming the edges of hollow parts, containing working tools mounted on the movable and stationary parts — a matrix and a punch made in the form of knives mounted for movement in a direction perpendicular to the axis of the stamp pressure, and a drive for knives mounted for moving in the direction perpendicular to the axis of the pressure of the stamp, and the drive of the knives, characterized in that, in order to improve the quality of the parts obtained by improving the quality of the cut, it is equipped with a device for turning one of the slave tool with respect to the axis of the stamp, the knives are made in the form of at least two sectors, installed with the ability to move in the radial direction along the plane of contact of the punch and the matrix. A ~ A FIG. 2