SU742021A1 - Method of producing asymmetrical articles having elongated axis - Google Patents

Description

Union of Soviet

Socialist

Republics

DESCRIPTION OF THE INVENTION

State Committee

USSR for inventions and discoveries

TO AUTHOR'S CERTIFICATE (61) Additional to author. certificate-wu _ (22) 3 announced on 03/28/78 (21) 2595158 / 25-27 with the addition of application No. - (23) Priori get -

Published on June 25th, 1980. Bulletin No. 23

Date of publication of the description 27.06.80 (51) M. CL ^{1 2}

B 21 J 5/00

B 21 K 1/10 (53) UDC 621.

.73 (088.8)

(72) The inventors K. G. Kononov, L. I. Podrabinnik, Yu. S. Radyuchenko, and I. T. Senkin (71) Applicant Experimental Research Institute of Forging and Press Engineering

(54) METHOD FOR PRODUCING ASYMMETRIC PRODUCTS WITH EXTENDED AXLE

The proposed method relates to the processing of metals by pressure and can find application in various branches of engineering, in particular in the manufacture of eccentric shafts.

A known method of manufacturing asim- ^! metric products with an elongated axis by compressing the workpiece in sections by two strikers with their introduction into the workpiece, the specific deforming forces of one of which exceed the specific deforming forces of the other [1].

The disadvantages of this method are the low quality of products and low productivity of the process in the manufacture of products with an eccentricity of more than 5-10% of the diameter of the workpiece.

The aim of the proposed invention is to eliminate these drawbacks, namely, finding a method for manufacturing asymmetric products with an elongated axis such as eccentric shafts with large eccentricities, which allows to improve the quality of the work and to increase the productivity of the process.

This goal is achieved by the fact that during the application of the deforming force, the workpiece rotational-rotational motion with a variable angle of rotation is reported in it, while the amount of introduction of the striker into the workpiece with high specific forces is reduced with an increase in the angle of rotation of the workpiece and increased with its decrease.

The invention is illustrated by drawings. In FIG. 1 shows a diagram of the first transition of a process.

In FIG. 2 shows the sequence of movements of the tool and the workpiece for one period of the swinging movement of the workpiece.

In FIG. 3 shows the calibration transition of the axisymmetric compression operation of the obtained eccentric neck.

At the first transition of the process - the operation of asymmetric crimping by the striker with high specific forces - deforming 1 and the supporting striker 2 compress the workpiece 3 installed in the clamping device 4 coaxially with its axis of rotation. The strikers 5, identical in shape and transmitted specific forces, for subsequent compression are withdrawn from the working area and do not participate in asymmetric compression transitions. The working surfaces of the deforming and supporting strikers are made in such a way that F. (F ^ / ^^ 5) · This ratio of the areas is provided both by the dimensions of the working surface along the length (δ ₂ >) and the radii of these surfaces (R ^ i Rj. Radius R ₂ reference striker is made equal to or slightly larger than the radius of the workpiece (1,03 ... 1,05 ^{R of the} workpiece), and the radius of the deforming striker R ^ is several times the radius of the workpiece (Rn / R _3ctr ^ 1,5 ... 2) . At the same time, the angle of coverage of the workpiece by the support striker is as high as possible (0 ° at least 120 °).

To prevent bending of the workpiece during deformation, the front plane of the support striker 2 is shifted relative to the front plane of the deforming striker 1 by 1 ... 2 R _3ar

The workpiece 3 rotates in both directions from the initial position by a certain angle + ¾. In such movement, the workpiece contact with its reference striker is retained by turning to any angle M * H * 4 _of that same sposobustvuet decrease bending. In the initial position, the workpiece is compressed to the maximum value for this transition (Fig. 2, item 1). After that, the workpiece is rotated, and the amount of compression is reduced (pos. P, 111). Having reached the extreme position (C »-Ψό λ, the direction of rotation of the workpiece is changed, and the hammer moves to the center of the workpiece, rolling around the surface of the deformed part (pos. 1U, Y). After passing the initial position, the hammer 1 deforms the workpiece again. The amount of compression decreases with increasing angle ( Pos. U1, UP). When rotating in the initial position, the striker rolls over the surface for 742021 4 preparations (pos. USh.) Then turn on the feed, moving the workpiece and the described cycle is repeated until the technological transition is completed. ment (pos. IX) to be crimped workpiece Dodge few transitions constituting the asymmetric reduction step.

If necessary, draw up an additional calibration transition of the axisymmetric compression operation obtained. eccentric cheek strikers 5 (Fig. 3). Boyki 1 and 2 during this operation do not participate in the work.

The method can be implemented on a radial crimping machine, with independent adjustment of the tool stroke, equipped with programmed control, on an automatic forging complex (Ti20 Pa ΑΚΙΊ 500/2) as part of a hydraulic manipulator-programmed control device or on a pulsating press (PPN) with software management.

Claims (1)

The proposed method relates to the processing of metals by pressure and can be used in various components of machine building, in particular in the manufacture of eccentric shafts. A known method of manufacturing asymmetric products with an elongated axis by compressing the billet into sections with two strikers with their introduction into the billet, the specific deforming forces of one of which exceed the specific deforming forces of the other jQ. The disadvantages of this method are the low quality of products and low productivity of the process in the manufacture of products with an eccentricity of more than 5-10% of the diameter of the workpiece. The purpose of the proposed invention is to eliminate these drawbacks, namely: finding a method for manufacturing asymmetric products with an elongated axis like eccentric shafts with large values of eccentricities, allowing to improve the quality of goods and increase the productivity of the process. This goal is achieved by the fact that the workpiece in the process of application of deforming efforts in it, jointly rocking movements with a variable angle of rotation, while the amount of penetration into the workpiece of the striker with high specific forces decreases with increasing angle of rotation of the workpiece and increases with its decrease. The invention is illustrated in the drawings. FIG. 1 is a diagram of the First Transition Process. FIG. 2 shows the sequence of movements of the tool and the workpiece in one period of the swinging movement of the workpiece. FIG. 3 shows the calibration transition of the axisymmetric reduction operation of the resulting eccentric neck. At the first transition of the process — an asymmetric crimping operation with a high specific force — deforming 1 and a supporting striker 2 — crimp the workpiece 3 installed in the clamping device 4 coaxially with its axis of rotation. Equal in form and transmitted specific forces, the strikers S for subsequent crimping are removed from the working zone and do not participate in the work of asymmetric crimping transitions. The working surfaces of the deforming and supporting dies are made in such a way that Rj F. (F, / F, 5). Such a ratio of areas is provided both by the dimensions of the working surface along the length (b &) and the radii of these surfaces (R4 R,). The radius R of the supporting striker is made equal to or slightly larger than the radius of the billet (1.03 ... 1.05 billet), and the radius of the deforming striker R is several times larger than the radius of the billet (Rn / Rg ir l, S. 2). the angle of coverage of the workpiece by the support head is made as large as possible (0 ° not less than 120 °). To prevent the workpiece from bending during deforming, the front plane of the support head 2 is offset relative to the front plane by deforming the head 1 by the value of E 1, .. 2 Workpiece 3 performs turn in both directions from the starting position to some second angle 1%. During such movement of the workpiece, its contact with the support head is maintained when rotated to any angle, which also contributes to the reduction of bending. In the initial position, the billet is compressed to the maximum value for this transition (Fig. 2, pos. After that, the workpiece is turned, and the reduction value is reduced (pos, P, W). Having reached the extreme position (C - Cho, the direction of rotation of the workpiece is changed, and the striker moves to the workpiece pentru, rolling the surface of the deformed part (pos. 1U, y). After passing the initial position, the striker 1 again deforms the workpiece. The reduction in the angle increases (pos, U1, UE). When rotated, the striker rolls around to the initial position for 7 4 This includes turning on, moving the workpiece and the written cycle repeating until the technological transition is completed. With large total reduction ratios (pos, IX), the preparation should be reduced in several transitions constituting a symmetric reduction operation. , they register the additional calibration transition of the axisymmetric reduction operation of the obtained xcentric cheek by the strikers 5 (Fig. 3). The strikers 1 and 2 do not participate in this operation. The method can be implemented on a radial-crimping machine, with independent adjustment of the tool stroke, equipped with software control, on an automatic forging complex (such as AKP 500/2) as part of a hydraulic press-torch-control software device or on a pulsating-load press with software management. The invention method of manufacturing asymmetric products with an elongated axis by compressing the workpiece in sections with two strikers with their introduction into the workpiece, the specific deforming force of one of which exceeds the specific deforming force of the other, characterized in that, in order to improve the quality of the products and increase productivity, the workpiece in the process of applying a deforming force to it, a rocking-rotational motion, a motion with a variable angle of rotation, is reported, with the amount of penetration into the work piece with high specific force E reduces with an increase in the angle of rotation and the workpiece increases when decreasing. .Sources of information taken into account in the examination 1. USSR author's certificate kl. B 21 T 5/00, 1976, for registration number 2409373 / 25-27. DL 5 5 g