RU2799649C1 - Device for equal-channel angular pressing of a metal blank to obtain a grover washer - Google Patents

Abstract

FIELD: metal forming.

SUBSTANCE: invention can be used in the manufacture of metal blanks in the form of a Grover washer. The device contains an upper half-matrix with a vertical channel and a lower half-matrix. Said semi-matrices have an arc-shaped composite channel in the form of a broken circle passing through both semi-matrices along a helical line with an inclination. The beginning and end of the arcuate channel are located in different planes. The cross section of the channels is equal to the cross section of the metal workpiece.

EFFECT: hardened metal blanks are obtained.

1 cl, 2 dwg, 1 ex

Description

The invention relates to the field of creating devices designed for severe plastic deformation of materials by equal-channel angular pressing.

A device for equal-channel angular pressing of a workpiece is known, in which vertical and horizontal channels intersecting at an arbitrary angle are drilled in a solid blank and the deformed sample is pushed out of it by subsequent samples [Segal V.M., Reznikov V.I., Kopylov V.I. and other Processes of plastic structure formation. Minsk: Science and technology. - 1994. - 232 p.].

The use of this device is limited to obtaining a hardened material at the output in the form of a straight bulk billet.

The device for equal-channel angular pressing of a metal workpiece contains two semi-matrices - lower and upper, made with a vertical channel [RU 2188091 C2, 27.08.2002, V21C 25/00, 5 p.].

A disadvantage of the known device is the impossibility of obtaining a hardened metal material in a form other than a straight rod.

A device for equal-channel angular pressing of a metal workpiece, taken as a prototype, contains two semi-matrices - lower and upper, made with vertical and arcuate channels with a cross section equal to the cross section of the workpiece [RU 2424073 C1, 08.02.2010, V21C 25/00, 3 s .].

The disadvantage of the prototype is the limited use of the device to obtain hardened metal material only in the form of an arc.

The objective of the present invention is to develop a device for equal-channel angular pressing of a metal workpiece, which ensures the production of a hardened workpiece in the form of a Grover washer.

The task is achieved in that the device for equal-channel angular pressing of a metal workpiece to obtain a Grover washer contains an upper half-matrix with a vertical channel and a lower half-matrix, while the said upper and lower half-matrices are made with an arcuate composite channel in the form of a broken circle passing through both dies along a helical lines with an inclination, the beginning and end of the arcuate channel are located in different planes, and the cross section of the vertical and arcuate channels is equal to the cross section of the metal workpiece.

The proposed design of a device for equal-channel angular pressing of a metal workpiece, containing an upper half-die with a vertical channel and a lower half-die, in which the said upper and lower half-dies are made with an arcuate composite channel in the form of a broken circle passing through both half-dies along a helical line with an inclination, the beginning and the end of the arcuate channel are located in different planes, and the cross section of the vertical and arcuate channels is equal to the cross section of the metal workpiece, which contributes to the production of a hardened metal workpiece in the form of Grover's washer.

Comparative analysis with the prototype shows that the inventive device for equal-channel angular pressing of a metal workpiece provides a hardened Grover washer.

The scheme of the proposed device for equal-channel angular pressing of a metal workpiece is shown in Fig. 1.

A device for equal-channel angular pressing of a metal workpiece contains an upper 1 and a lower 2 semi-matrices, a punch 5, a vertical channel 3 located along an annular arc and made along a helical line in both semi-matrices, a channel 6 at an angle α to the plane of contact of the semi-matrices 1 and 2. the upper open part of the channel 6 closes its lower open part and thus a composite closed channel is formed. The half-matrices are connected using three screws 7.

A device for equal-channel angular pressing of a metal workpiece operates as follows.

In the vertical channel 3 of the upper semi-matrix 1, a workpiece 4 made of metal material is installed, which, under the influence of the punch 5 on it, is pressed into the arcuate helical channel 6. The workpiece 4, moving from the vertical channel 3 to the arcuate helical channel 6 with an inclination angle α, is deformed at the intersection channels as in equal channel angular pressing. To obtain Grover's washer, a metal workpiece is pressed through an arcuate helical channel at an angle α.

Example

A device was manufactured and tested (Fig. 2), in which the angle α was 3°55'.

Claims (1)

A device for equal-channel angular pressing of a metal workpiece to obtain a Grover washer, characterized in that it contains an upper half-die with a vertical channel and a lower half-die, while the said upper and lower half-dies are made with an arcuate composite channel in the form of a broken circle passing through both half-dies along a helical lines with an inclination, the beginning and end of the arcuate channel are located in different planes, and the cross section of the vertical and arcuate channels is equal to the cross section of the metal workpiece.

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