CN2345299Y

CN2345299Y - Reinforced die cover for wire drawing die

Info

Publication number: CN2345299Y
Application number: CN 98213005
Authority: CN
Inventors: 熊光仪
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-02-21
Filing date: 1998-02-21
Publication date: 1999-10-27
Anticipated expiration: 2008-02-21

Abstract

The utility model provides a reinforced die sleeve for a wire drawing die. A plastic deformation die sleeve in which the inner hole wall of an inlet end 1 on the die sleeve of a wire drawing die is reduced inward and compressed downwardly. The die sleeve of the new structure overcomes the defects of the traditional die sleeves in different degrees, can effectively prevent a die core from entirely or partially shedding out of the die sleeve, and can guarantee that the die sleeve plays a prestressing action on the die core. The utility model can be widely used for manufacturing wire drawing dies in cable industry and metal product industry.

Description

Wire drawing die is strengthened die sleeve

The utility model provides a kind of wire drawing die sleeve new construction.

Wire, metal bar are in drawing process, and core rod makes it to produce plastic deformation to the compression stress of metal material, promptly in the length direction Zhongchang with radially dwindling the reaction force that core rod then can be equated.The frictional force of wire, metal bar and from shaking force of wire drawing machine etc. produces a large amount of heat simultaneously.The effect of die sleeve is to apply prestressing force to core rod, reduces or offsets the various stress that core rod is born when the drawing to reach.Die sleeve generally adopts the middle preferably carbon copper machining of plasticity to form.Traditional edge cover method has three kinds: cold-press method, hot pressing are gone and hot jacket.Though core rod and die sleeve are interference fit, because of how irregular the outer garden of core rod shape is, core rod is also inhomogeneous with contacting of die sleeve, has weakened the prestressing force action effect of die sleeve to core rod, and mould is heated in drawing process and shakes and is prone to still that core rod is press-offed and fracture phenomena.

The purpose of this utility model is to provide a kind of die sleeve new construction that core rod is had interlock action and strengthening action for overcoming press-off phenomenon and overcome the core rod fracture phenomena to a certain extent of above-mentioned core rod fully.

Technical solution of the present utility model is as follows:

The utility model is after wire-drawing mold core is bumped into die sleeve by aforementioned conventional edge cover method, on the die sleeve arrival end, apply suitable power, the die sleeve inner hole wall is produced to the center to be dwindled and to the plastic deformation of lower compression, be six the uniform deformed areas along die sleeve arrival end (1) generation shown in the accompanying drawing.

Advantage of the present utility model mainly is:

One, this die sleeve new construction, the interior hole dimension after the die sleeve distortion is littler than core rod diameter, can effectively stop the core rod integral body or the back of breaking partly to be press-offed, and core rod is had interlock action;

Two, to the process of die sleeve pressurization, make the die sleeve inner hole wall produce plastic deformation to lower compression, the loose contact phenomenon that core rod and die sleeve edge is joined is improved to some extent, has strengthened the prestressing force effect of die sleeve to core rod.

Below in conjunction with drawings and Examples the utility model is done some explanations, among the figure: 1, die sleeve arrival end, 2, core rod.

As shown in drawings, make die sleeve arrival end endoporus edge part produce more than one hole to die sleeve pressurization, among the figure be six uniform.Most metal of pressurized pushes to the center, makes the local hole wall size of die sleeve after the distortion be significantly less than the core rod outside dimension, and core rod just can not deviate from from die sleeve, and the die sleeve of this structure has played good interlock action to core rod.Partly the metal of pressurized is pressed downward and contracts, and has filled up the defective of core rod and die sleeve loose contact to a certain extent, has played the prestressed effect of reinforcement.

The utility model also can form a heavy stand in the distortion of die sleeve arrival end (1) endoporus edge part entire pressurisation, and shown in front view in the accompanying drawing, the prestressed effect of reinforcement also can be played in this endoporus edge part distressed structure of indentation simultaneously.

Claims

1, wire drawing die is strengthened die sleeve, it is characterized in that the inner hole wall of die sleeve arrival end (1) and edge part have to the center to dwindle and to the plastic deformation of lower compression.

2, wire drawing die according to claim 1 is strengthened die sleeve, it is characterized in that the distortion of die sleeve arrival end (1) endoporus edge part can produce a hole, also can be several holes; Can be concave pit, can also be die sleeve arrival end (1) the endoporus edge part distressed structure of indentation simultaneously.