SU1337177A1 - Method of cross=screw rolling of sectors for pointing dowels - Google Patents

Abstract

The invention relates to the technology of making dowels by cross-wedge rolling and allows improving the quality of dowels with respect to the shape of their end points and the continuity of the metal. For this, rolling the piece blanks is performed with the formation of terminal waste during the introduction of working blades (l) of deforming wedges at the optimum distance from the ends of the blanks. In this case, the rolling is performed with a limited, speed by the profiled edges of the tool. Workers L of the tool in the intake areas are inclined toward the flat edges at a given angle. This ensures the support of the metal of the billet in the direction of the sharpened dowel, and the formation of an axial yoke and breakage of the point of the dowel sharpened during rolling is excluded. 3 il. c (L O9

Description

I-133

The invention relates to the technology of rolling production, in particular, to the method for the production by cross wedge rolling of sharp sections of dowels.

The purpose of the invention is to improve the quality of products by eliminating the central axial tightening and eliminating the breakage at the point of the spike.

FIG. 1 shows a schematic of a method for cross-wedge rolling of sharpened dowel points; in fig. 2 shows a front wedge wedge tool for carrying out the method; in fig. 3 is the same, top view

The end part of the workpiece 1 is rolled between two wedges 2 and 3, having an intake 4 and calibrating 5 areas with adjoining working blades 6 formed by deforming faces 7 and 8, moreover, the deforming face 8 from the side of the workpiece is flat and inclined to the plane the bases 9 are wedges at an angle of .0 40-50, and the working blades of the 6 fence sections are inclined toward the flat deforming faces 8 at an angle of 2-4 °.

The workpiece 1 is fed to the deformation zone for days and rolled in the end section of the dowel point between two wedges Nm 2 and 3 with a rolling speed of 0.4-0.6 m / s when the working blades of the deforming wedges are inserted into the workpiece at a distance of at least 0 from its end. , 4 billet diameters.

According to this method, rolling in a cold state of the dowel from a billet of 5.4.4 mm steel 70 with mechanical properties: 480.9 MPa

65,358.7 MPa; 0 / 4- 69.7% Shaping areas sharpen-

ten

17

;

72

Cross-wedge rolling between movable and stationary wedges was realized with the angle of inclination of the flat deforming face 40-50 to the plane of the base of the wedges with a rolling speed of 0.4-0.6 m / s and the angle of inclination of the working blades of the intaking sections towards the flat deforming faces on angle of 2-4 °.

five

0

0

five

The method ensures the elimination of the central axial tightening and the elimination of a break in the point of the point, and, consequently, an increase in the quality of the products.

Claims (1)

Invention Formula The method of transverse wedge rolling of the dowel points in which the end part of the billet is rolled between two wedges having intake and calibrating sections with adjoining working blades formed by deforming edges, characterized in that, in order to improve the quality of the products axial weighting and avoiding a break in the point of the spike, the workpieces are rolled individually at a rolling speed of 0.4-0.6 m / s when the working blades are inserted deforming wedges into the workpiece at a distance from The butt end is not less than 0.4 of the workpiece diameter with wedges, the deforming faces of which from the end of the workpiece are flat and inclined to the plane of the base of the wedges at an angle of 40-50 °, and the working blades of the intake areas are inclined towards the flat deforming faces by an angle 2-4. five Plot Editor M. Nedoluzhenko Compiled by Y. Markov Tehred L. Oliynyk KoppeJtTop N. King 4077/1) Circulation 582 Subscription VNIKPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Manufacturing and printing company, Uzhgorod, st. Project, 4 FIG. 2 . Plotting area