RU2609607C2 - Die for cold stamping of sheet parts - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: this invention refers to pressure processing of metals, namely to cold stamping method for parts with thin-wall variable profile for aviation gas turbine motors. Cold stamping die for sheet parts includes a punch and matrix with drives. Workpiece is placed between the punch and matrix. The punch is made in the form of a device consisting of case with a guide bushing inside, the bushing pusher linked to thin-wall punch. Guide bushing consists of two parts, and has full punch profile in the joint at the contact point with workpiece and punch edge profile in other areas.

EFFECT: improved hardness of punch, expanded process capabilities.

8 dwg

Description

The present invention relates to the field of engineering, namely to the manufacture by cold stamping of parts of a thin-walled profile from sheet material, for example, small blades of variable profile of gas turbine aircraft engines. The invention can be used in aviation and other industries.

A device for cold stamping small parts that have a direction in the sleeve for the punch in the punching zone, namely small holes on the side surface of the sphere (See, for example, V.G. Mescherin "Sheet stamping", Atlas of diagrams. Moscow, Engineering, 1975, Fig. 118).

A disadvantage of the known device is the lack of direction of the thin punch from the point of attachment to the guide sleeve.

Closest to the invention in terms of technical essence and the achieved result is a stamp for cold stamping of sheet parts containing a punch and a die with drives, and a workpiece placed between them (See, for example, M.M. Durandin, N.P. Rymzin, N. A. Shikhov “Stamps for cold stamping of small parts”, Album of structures and schemes. Moscow, Engineering, 1978, p. 35, Fig. 2.22).

A disadvantage of the known device is the lack of direction of the thin punch from the point of attachment to the guide sleeve.

The technical result of this invention is to increase the rigidity of thin-walled punches, which allows to expand the scope of cold stamping to obtain finer details.

The technical result of the invention is achieved by the fact that in the stamp for cold forming of parts containing a punch and a die with drives and a workpiece placed between them, the punch is made in the form of a mechanism consisting of a housing, inside of which there is a guide sleeve with a pusher connected to a thin-walled punch, in this case, the guide sleeve consists of two parts and in the connector in the place of contact with the workpiece has a full profile of the punch, and in the rest it has an internal profile of the punch along its edges.

The essence of the invention is illustrated by drawings, where

FIG. 1 - shows a schematic block diagram of the device, the punch and the matrix in the allotted state;

FIG. 2 - shows a schematic block diagram of a device in a punching state;

FIG. 3 - sectional view of the punch mechanism;

FIG. 4 is a section AA in FIG. 3;

FIG. 5 is a section BB in FIG. 3;

FIG. 6 - a pusher;

FIG. 7 - shows the guide sleeve;

FIG. 8 - shows the punch.

The stamp for cold stamping parts and small blades of aircraft parts contains a punch drive 1, a punch mechanism 2, a workpiece 3, a die 4, and a die feed drive 5. The punch mechanism 2 comprises a housing 6, a guide sleeve 7, a pusher 8, a punch 9, and a spring 10.

The device operates as follows.

In the initial position, the matrix 4 and the mechanism of the punch 2 are in a diluted state. Drives 1 and 5 are allotted (Fig. 1). Next, the drive of the matrix 5 is turned on, which brings the matrix 4 to the workpiece 3 until it stops. After that, the drive of the punch 1 moves the mechanism of the punch 2 in the direction of the workpiece 3 to the size "E" until the stop 11 abuts against the stop 12, while the end face K of the guide sleeve 7 is aligned with the end face "And" of the housing 6. Moving the housing 6 the pusher 8 will force the punch 9 to pierce the workpiece by size E.

The guide sleeve 7 consists of two parts P and P and in the connector has a full profile of the punch 9 in section P, and in section P has an internal profile of the punch 9 along its edges 13 and 14. The guide sleeve 7 in section P is axially cut under the cylindrical part pusher 8. The protruding part of the guide sleeve 7 in the section “E” is minimal and is determined by the thickness of the workpiece being punched 3. The punching force from the body 6 to the pusher 8 is transmitted by two nuts 15, which regulate the reach of the punch 9 outside the guide sleeve 7 with a new setting nson 9 and in case of its regrinding. The punch 9 has in cross section an alternating thin-walled profile with a radius R at the inlet and outlet of up to 0.15 mm, constant over the entire length. At the end of the profile of the punch 9 there is a hole 16 through which the pusher 8 pulls the punch back.

After the removal of the drive 1 of the punch 9 and the drive 5 of the matrix 4, the process of punching the workpiece 3 is repeated.

Using this invention will increase the rigidity of a thin-walled punch, which will expand the scope of cold stamping for punching thinner parts.

Information sources

1. V.G. Meshcherin "Sheet stamping", Atlas of schemes. Moscow, Mechanical Engineering, 1975, Fig. 118 - analogue.

2. M.M. Durandin, N.P. Rymzin, N.A. Shikhov “Stamps for cold stamping of small parts”, Album of designs and schemes. Moscow, Engineering, 1978, p. 35, Fig. 2.22 is a prototype.

Claims (1)

A stamp for cold stamping of blades of a thin-walled variable profile containing a punch mechanism, a die and their drives, characterized in that the punch mechanism is made in the form of a housing, a guide sleeve with a pusher located inside it and a thin-walled punch connected to it, which has a variable profile with radius at the edges, while the guide sleeve is made detachable, consisting of two parts, one of which in the connector, in contact with the workpiece, has a full punch profile, and the other has a profile uansona on its edges.

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