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Process method of tripod ball inner sliding sleeve capable of axially moving and back extrusion concave die

A technology of axial movement and three-ball pins, which is applied in the direction of metal extrusion dies, etc., can solve the problems of insufficient metal of the inner sliding sleeve of three-ball pins, affecting product quality, metal flow, and unreasonable volume distribution, etc., to improve product quality. Quality, increase the effect of metal fullness

Active Publication Date: 2010-07-14
江苏威鹰机械有限公司
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Problems solved by technology

[0004] The present invention mainly solves the unreasonable flow and volume distribution of metal existing in the existing forging technology in the production of the axially movable three-ball pin inner sliding sleeve, which easily causes the metal between the walls of the three-ball inner sliding sleeve to be unsatisfactory. Technical issues affecting product quality

Method used

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  • Process method of tripod ball inner sliding sleeve capable of axially moving and back extrusion concave die
  • Process method of tripod ball inner sliding sleeve capable of axially moving and back extrusion concave die
  • Process method of tripod ball inner sliding sleeve capable of axially moving and back extrusion concave die

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Embodiment Construction

[0018] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

[0019] The processing method of the inner sliding sleeve of the three-ball pin that can move axially:

[0020] ①Blanking, intercepting bar;

[0021] ② Upsetting, heating the bar to a temperature of 900°, upsetting in the upsetting die to form two cylinders of different sizes and diameters and the transition section between them;

[0022] ③Reverse extrusion in a hot state. In the reverse extrusion die, the punch is used to back-extrude the large cylinder so that the inner hole of the large cylinder forms a three-ball pin lane;

[0023] ④ After annealing, cool to normal temperature, perform shot blasting, phosphating, and saponification treatment, and obtain the semi-finished product of the three-ball pin inner sliding sleeve;

[0024] ⑤Using the finishing mold to finish and extrude the inner hole fair...

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Abstract

The invention discloses a method for processing a tripod inner sliding sleeve capable of moving axially and a backward extrusion concave die, wherein the method comprises the following steps: (1) blanking; (2) upsetting; (3) backward extruding in the thermal state; (4) cooling to the normal temperature after annealing and carrying out treatments of shot-blasting, phosphatization and saponification; and (5) carrying out the sizing extrusion forming of the inner and the outer walls of a inner hole ball track by adopting a sizing die. The backward extrusion concave die comprises an upper die, a concave die and filler blocks, wherein the concave die is composed of an ejector arranged at the bottom of a die cavity and the filler blocks arranged at the periphery of the die cavity, the die cavity consists of two cylinders with different sizes and diameters and a hollow cavity formed by transition sections between the two cylinders, and three concaves are disposed on a die wall of the die cavity, and are corresponding to the tripod ball track thick wall positions. The method reasonably carries out metal volume distribution, increases the metal plumpness between the ball track and the outer wall and improves the product quality.

Description

technical field [0001] The invention relates to a processing method of an axially movable three-ball pin inner sliding sleeve and a back-extrusion die, in particular to a method of forming a pre-formed blank by upsetting according to the metal flow forming rule, and then in the back-extrusion concave The processing method of the axially movable three-ball pin inner sliding sleeve formed in the finishing die by reverse extrusion in the die cavity, and finally formed in the finishing die, and the special mold for the reverse extrusion die. Background technique [0002] The axially movable tripod pin inner sliding sleeve has a complex structure and is difficult to process and inspect, but it has many excellent properties such as compact structure, light weight, low noise, high reliability, and maintenance-free. At present, most of the transmission systems of cars in the world use this product as a key transmission component. The inner cavity of this product is evenly distribut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/20B21C23/01B21C25/02B23P15/00
Inventor 张华文陈进华万永福
Owner 江苏威鹰机械有限公司
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