SU1021512A1 - Tool for making parts such as rod with beaded portion - Google Patents

Abstract

TOOL FOR MANUFACTURING A DAEAL TEMPERATURE ROD TYPE TYPE, containing a spring-loaded hollow punch with a sliding core placed inside it and a matrix having a cavity for direct extrusion of the part rod and extended to the end of the transitional zone for the transient surface from the rod from the trestle frame and the junction frame for the transitional surface from the rod to the trestle and the jig for the transitional surface from the rod to the trestle section and extended to the end of the rod for the transition surface from the rod to the trestle section and the vane for the transitional surface from the rod to the jets the fact that / in order to increase the tool life and the quality of the parts produced, part of the punch cavity on the matrix side is made conical, expanding towards the matrix, and Diameter of the cavity of the punch at its end is filar diameter portion of the matrix at its end. . sl with 10 ate to

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of high-strength dowel nails and dowel screws.

Known> a tool for the manufacture of parts such as a core with a thickening, containing a punch for removing the thickening (collar) of the part and a matrix for direct issuing; · The core of the part [1].

The disadvantages of the known tool are its low durability and low quality of manufactured parts.

Also known is a tool for manufacturing parts such as a core with a thickening, containing a spring-loaded hollow punch with a sliding core placed inside it. and a matrix with a lead-in section extended to its end for direct extrusion of the part rod [2].

The disadvantages of the known tool are its low durability and low quality of manufactured parts due to the difficulty of designing a thickened part of the part during final stamping, as well as due to the high extrusion forces of the rod.

The purpose of the invention is to increase the durability of the tool and the quality of the manufactured parts.

This goal is achieved by the fact that in the tool for the manufacture of parts such as a core with a thickening, containing a spring-loaded hollow punch with a sliding core placed inside it and a matrix with an extension section extended to its end for direct extrusion of the part core, part of the punch cavity is on the matrix side made conical, expanding to the matrix, and the diameter of the cavity of the punch at its end is equal to the diameter of the entry portion of the matrix at its end.

The drawing shows a tool for producing the dowel-screw, wherein: a) setting the preform in a hollow spring-loaded punch in front B, because the ^'3 insipidus matrix; b) the formation of a cone on the workpiece in front of the matrix. the initial moment of the first strike; c) the intermediate stage of the process of extruding the rod of the part and the movement of the "cone." On the workpiece; g) the end of the process of direct extrusion of the rod. nya and reduction of the shank of the manufactured part at the final moment of the first impact; d) stamping of the thickened Part of the part with a shoulder from the cone of the workpiece.

The tool, usually mounted on a double-hit machine, contains a hollow spring-loaded punch 1 with a sliding core 2 located inside it and a die 3 for direct extrusion with a conical section. In the cavity of the punch 1 on the matrix side there is a conical section, the diameter of which at the end of the punch is equal to the diameter of the e-section of the matrix 3 at its 15 end.

For the final stamping of the part, a punch 4 with a pusher 5 and a reducing matrix 6 with a pusher 7 are used.

2Q The tool works as follows.

The cylindrical workpiece 8 is installed in the cavity of the spring-loaded punch 1 and the sliding of the 25 core 2 first produces a closed draft of the workpiece in the conical section of the cavity of the punch 1 and enter the * "* section of the matrix 3. With the further movement of the core 2, the core of the part is directly extruded into the matrix 3 and moved cone on the workpiece. At the final moment of extrusion, the end of the workpiece is reduced in matrix 6. Upon final stamping by the punch 4, a thickening (shoulder) of the manufactured Part is formed from the remaining conical part of the workpiece.

The formation of a cone on the front of the workpiece in front of the entrance to the cavity of the matrix at the initial moment of the first impact allows you to facilitate the centering of the workpiece after moving it from the position of the segment. Preliminary sedimentation of the cone at the end of the workpiece before extrusion of the rod and continuous movement of the cone over the workpiece can increase the ductility of the metal due to the use of the Bausinger effect and thereby increase the resistance of the extrusion matrix. The friction force at the contact point between the workpiece and the punch is reduced, since the part of the workpiece that is not in contact with the matrix walls has a conical shape. The process of final stamping of the thickening of a part from a preformed cone is facilitated.

VNIIIPI Order 3960/9

Circulation 686 Subscription

Branch of PPP Patent, Uzhgorod, Project 4,

Claims (1)

TOOL FOR MAKING DETAILS OF TYPE OF BAR WITH THICKNESS, containing a spring-loaded hollow punch with a sliding core placed inside it and a matrix having a cavity for direct extrusion of the part rod and an extension section extended to the end to form a transition surface from the rod to the thickened part of the part, characterized in that , in order to increase tool life and quality of manufactured parts, part of the punch cavity on the die side is conical, expanding towards the die, and the diameter the cavity of the punch at its end face equals the diameter filar lan · ka matrix at its end.