SU1294409A1 - Method of producing articles having curvilinear axis - Google Patents

Abstract

The invention relates to the processing of metals by pressure and provides extrusion of a product with a curvilinear axis, for example, S-shaped or helix-type. The method is carried out by direct extrusion of a press product through a matrix (M), initially set offset from the axis of the workpiece. In the process of deformation, the lower boundary of the deformation zone is displaced perpendicularly to the axis of the workpiece due to the displacement M. At a linear displacement M, products with varying curvature are obtained, and at a circular displacement, a helix. The speed of movement of M Vl is recommended to choose within the limits of W.l

Description

The invention relates to the processing of metals by pressure and can be used for the manufacture of products with a curvilinear axis.

The purpose of the invention is the expansion of technological capabilities by ensuring the production of products, for example, an S-shaped form or type of helix.

FIG. 1-3 schematically show the sequence of the method.

The method of manufacturing products with a curvilinear axis is carried out by direct extrusion of the press product 1 with the creation of a deformation zone with an initial lower limit eccentric relative to the axis of the workpiece 2. In the process of deforming, the lower boundary 3 of the deformation zone is shifted in a plane perpendicular to the axis of the workpiece 2, with a speed of DL. For this workpiece 2 is placed in a container 4 with a movable matrix 5, the working point of which is set offset from .

In the process of deforming, the matrix 5 is moved at a speed of UL. The movement of the matrix 5 (lower limit 3 of the deformation zone) can be carried out either along a linear trajectory to obtain an S-shaped product, or along a curvilinear, for example around the circumference, to obtain a helix-type product, diameter ko- | The axis is determined by the eccentricity of the location of the axis of the die hole at a constant flow rate of material from the deformation zone.

It is advisable to move the lower boundary of the deformation zone at a speed of 0.05–0.15 of the speed of movement of the upper end of the workpiece (Y), since at a speed of 0.05 the curvature practically does not change, and at 0.15V there is a decrease

0

Q

g

five

quality of products due to cracks and scratches.

Example. An S-shaped product 0 5 mm and a product of the spring type 0 35 mm are made of blanks 0 60 mm, height 85 mm, made of steel St 3 in an experimental tube mounted on a hydraulic press with a force of 100 tf. The speed of movement of the punch (upper end of the workpiece) mm / s, the speed of movement of the die mm / s (0.13). Received quality products with a diameter of 05 ± 0.8 mm.

The proposed method provides for obtaining products of arbitrary curvature using a simple snap.

Claims (4)

1. A method of manufacturing products with a curvilinear axis by direct extrusion of a press product from a billet with the creation of a deformation zone with a lower limit eccentric relative to the axis of the workpiece, characterized in that, in order to expand technological capabilities, the lower limit of the deformation center is displaced in perpendicular to the axis of the workpiece during the deformation process. 2. A method according to claim 1, characterized in that the lower boundary of the deformation zone is moved along a linear trajectory. 3. A method according to claim 1, characterized in that the lower boundary of the deformation zone is moved along a curvilinear trajectory. 4. Method according to paragraphs. 1-3, characterized in that the linear velocity of movement of the lower boundary of the deformation zone is chosen from the dependence of Ul (0.05 ... 0.15) Y, where Ul is the linear velocity of displacement of the lower boundary of the deformation zone; Y is the speed of movement of the upper end of the preform. V //////////. Fyg.1 Fig.2 V //////. V / 77X Fig.Z