RU1784004C - Tool unit of cold heading automatic machine for manufacture of rod parts with heads - Google Patents

Abstract

Usage: in the manufacture of parts such as a rod with a head on machines with split matrixes. SUMMARY OF THE INVENTION: The tool assembly of a cold-filling machine comprises punches of preliminary and final disembarkation, a jjaateMVibie matrix, a cutting matrix, the axis of which is offset from the axis of the punches. At least one recess is formed on the working end surface of the cutting die to form the chamfer of the rod during planting. The axis of the forming recess is offset relative to the axis of the matrix by an amount equal to the distance of the displacement of the axis of the matrix relative to the axis of the punches. 4 ill.

Description

The invention relates to the processing of metals by pressure, in particular to cold heading, and can be used in the manufacture of parts such as a rod with a head on automatic machines with split matrixes.

A tool assembly of a cold head bolt press machine is known, comprising a pre and final upset punch, demountable dies, a cutting die whose axis is offset relative to the axis of the punches.

A disadvantage of the known construction of the tool assembly is that its use in stamping does not allow the production of bevels with a chamfer at the end of the rod.

The purpose of the invention is the expansion of technological capabilities by chamfering at the end of the product rod.

 This goal is achieved by the fact that in the known tool site of a cold-upsetting machine for manufacturing core parts with heads containing punches of preliminary and final upsetting, detachable matrixes, a cutting matrix, the axis of which is offset from the axis of the punches, on the working end surface of the cutting matrix is made at least one shaping recess. Recess axis Displaced relative to the axis of the die by an amount equal to the distance of the offset of the axis of the die relative to the axis of the punch.

The presence on the end working surface of the cutting matrix of the forming recess and the displacement of the axis of the recess relative to the axis of the matrix by an amount equal to the distance of the displacement of the axis of the matrix relative to the axis of the punch allows the formation of a chamfer at the end of the rod of the part when it is planted.

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Figures 1-4 show the tool assembly and the e-use method, where: position I is the metal feed, position II is the preliminary heading and chamfer, position III is the final heading, position IV is the ejection of the finished part.

The tool assembly includes punches of preliminary 1 and final 2 upset, installed with the possibility of movement in the direction of the end surface of the split matrixes 3 and 4 from the head of the planted article 5. Detachable matrixes 3 and 4 are mounted with the possibility of movement between the axis 6 of the cutting matrix 7 and the axis 8 of the punches 1 and 2. The detachable matrix has at least one recess on the working end surface 9. The relief of the recess is identical to the relief of the chamfer of the rod of article 5, and its axis 10 is offset relative to axis 6 of the matrix 7 by an amount equal to the distance of the axis 6 of the matrix 7 relative to the axis 8 of the punches 1 and 2. The detachable matrix 7 is pressed into the spacer 11 and is installed with the working end surface to the end surface of the split matrices 3 and 4 from the side of the chamfer of the rod of the planted article 5.

The operation of the tool assembly is as follows.

The bar 12 (position I) through the cutting matrix 7 and the open upset detachable matrix 3 and 4 is fed to the stop 13. Then, the detachable matrix 3 and 4 are moved to the axis 8 of the landing part 5 of the cut edge 13

blank for disembarking part 5. The cut blank is transferred by detachable dies 3 and 4 to axis 8 of upset, where dies 3 and 4 are compressed. In position II

preliminary disembarkation of the head by the punch 1 and disembarkation of the chamfer at the end of the rod in the recess 9 of the cutting die 7. At position III, the punch 2 makes the final disembarkation of the head. After the final

upset, the split matrixes 3 and 4 together with the upset part 5 are returned to their original position, while at the initial moment, the split matrixes 3 and 4 are compressed and pushed out

parts 5 from the recess 9 of the cutting die 7. At position IV, the upset part 5 is completely ejected from the split dies 3 and 4 by the bar 12. Next, the operation cycle is repeated.

Claims (1)

Claims Tool assembly of a cold dispenser, dough machine for the manufacture of rod-shaped parts with heads, containing punches of preliminary and final upsetting, detachable dies, a cutting matrix, the axis of which is offset relative to the axis of the punches, so that, in order to expand technological opportunities by chamfering on at the end of the rod, at least one shaping recess is made on the working end surface of the cutting matrix, the axis of which is offset by a distance equal to the axis of the matrix the displacement of the axis of the matrix relative to the axis of the punch. Fig.Z P Fie.b