Manufacturing technology of automobile asymmetrical universal joint fork based on cold extruding technology and special mould thereof

A universal joint fork and manufacturing process technology, applied in metal extrusion dies and other directions, can solve the problems of low workpiece dimensional accuracy, low material utilization rate, harsh production environment, etc., and achieve good surface quality, high material utilization rate, and machine tool. The effect of less machining allowance

Inactive Publication Date: 2009-12-23
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the deficiencies of low material utilization rate, low production efficiency, harsh production environment, low dimensional accuracy and poor surface quality of the existing universal joint yoke manufacturing process, the present invention provides a method of improving material utilization rate, high production efficiency, Manufacturing process and special mold for automotive asymmetric universal joint yoke based on cold extrusion process with improved production environment, high dimensional accuracy and good surface quality

Method used

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  • Manufacturing technology of automobile asymmetrical universal joint fork based on cold extruding technology and special mould thereof
  • Manufacturing technology of automobile asymmetrical universal joint fork based on cold extruding technology and special mould thereof
  • Manufacturing technology of automobile asymmetrical universal joint fork based on cold extruding technology and special mould thereof

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Embodiment 1

[0027] refer to Figure 1 to Figure 6 , a kind of manufacturing process of the automobile asymmetric universal joint fork based on cold extrusion process, described manufacturing process comprises the following steps:

[0028] (1), using cylindrical bar cutting blanking;

[0029] (2) Carry out spheroidizing annealing to the blank to reduce its hardness, then pickling to remove scale, phosphating and saponification lubrication treatment, to obtain a cylindrical blank;

[0030] (3) Forward extrusion and closed shape correction, extruding the cylindrical blank to obtain the required asymmetric shape of the lower half of the universal joint yoke.

[0031] (4) Spheroidizing and annealing the extruded parts obtained by direct extrusion, then pickling to remove scale, phosphating and saponification lubrication treatment;

[0032] (5) Back-extrusion forming: back-extrusion produces a fork shape, and the fork shape of the universal joint fork freely extends upward; the redundant part...

Embodiment 2

[0036] refer to Figure 1 to Figure 6 , a special mold for the manufacturing process of the asymmetrical universal joint fork of automobiles based on the cold extrusion process, including a forward extrusion mold and a reverse extrusion mold, the forward extrusion mold includes a first upper mold base and a first lower mold base Formwork, the first upper formwork includes a first template 5, a first punch pad 4, a first fixed sleeve 3, a first bushing 2 and a first punch 1, and the first punch 1 passes through The first bushing 2 is fixedly connected with the first fixed sleeve 3, and the first fixed sleeve 3 is fixedly connected with the first template 5, and the first template 5 and the first fixed sleeve 3 are connected with a first A notch, the first punch pad 4 is located in the first notch; the first lower mold frame includes the first pressing plate 17, the first upper die 14, the first lower die 12, the first Backing plate 8, the first support 9, the first mold base 7...

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Abstract

The invention discloses a manufacturing technology of automobile asymmetrical universal joint fork based on cold extruding technology, comprising the following steps: (1) a cylindrical bar stock is adopted for shearing and blanking; (2) spheroidizing annealing is carried out on a blank so as to reduce blank rigidity, then oxide scale is removed by acid washing, and phosphating, saponification and lubrication treatment is carried out to obtain cylindrical blank; (3) direct-extrusion sealing shaping calibration is carried out to extrude and shape the cylindrical blank so as to obtain the needed asymmetrical shape of the bottom half of the universal joint fork; (4) extruded pieces obtained after direction extrusion are performed with spheroidizing annealing, then oxide scale is removed by acid washing and phosphating, saponification and lubrication treatment is carried out; and (5) backward-extrusion shaping is carried out: furcation is formed by backward extrusion, and the furcation of the universal joint fork freely extends upwards; the redundant parts of the furcation end surface are processed and cut off by a successor. The invention also provides a special mould for realizing the manufacturing technology. The invention improves material utilization factor, has high production efficiency, improves production environment, and has high precision of workpiece size and favourable surface quality.

Description

technical field [0001] The invention relates to a manufacturing process of an automobile asymmetric universal joint yoke and a special mold thereof. Background technique [0002] The traditional universal joint yoke is generally made of high-temperature forging blanks through subsequent mechanical processing. The forging process is complex, and the technical requirements for forging and heat treatment are extremely strict. A large amount of materials become forging flashes, and the machining workload is large. The utilization rate is low and the production efficiency is low. The blank needs to be heated and forged many times, which requires additional heating equipment. The production environment is harsh, the energy consumption is high, the manufacturing cost is increased, the dimensional accuracy of the parts is low, and the surface quality is poor. Contents of the invention [0003] In order to overcome the deficiencies of low material utilization rate, low production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/03B21C25/02
Inventor 杨庆华孟彬鲍官军吴海伟
Owner ZHEJIANG UNIV OF TECH
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