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Universal joint crossing shaft blank cold extrusion processing technology

A processing technology, a cross-axis technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of folding and sharp edges, scarring, blank surface cracks, etc., to avoid sharp edges and improve the utilization rate of steel.

Active Publication Date: 2018-07-17
HANGZHOU NEW CENTURY UNIVERSAL JOINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cold extrusion process for the blank of the universal joint cross shaft, which solves the defects of visible cracks, scabs, folds and sharp edges on the surface of the blank due to the existing blank processing technology of the universal joint cross shaft

Method used

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  • Universal joint crossing shaft blank cold extrusion processing technology
  • Universal joint crossing shaft blank cold extrusion processing technology

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Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1: a kind of universal joint cross shaft blank cold extrusion process, comprises the following steps:

[0042] 1) Cut the raw materials into material sections, grind the surface through centerless grinding, and inspect the cracks; spray the qualified material sections with water-based graphite lubricant, and dry the water-based graphite lubricant;

[0043] 2) The first annealing heat treatment: heat the material section to 845°C, keep it warm for 10 hours, cool to 330°C, take it out of the oven, and cool to room temperature;

[0044] 3) The material section is subjected to shot blasting treatment, followed by phosphating and saponification treatment;

[0045] 4) Place the material section on the hydraulic press for cold extrusion, and get a cross round rod blank in the mold;

[0046] 5) Use a low-carbon steel rod with a round rod head to hammer and grind the arc-shaped burr of the cross round rod-shaped blank, so that it is bent and turned to one side to for...

Embodiment 2

[0050] Embodiment 2: a kind of universal joint cross shaft blank cold extrusion processing technology, comprises the following steps:

[0051] 1) Cut the raw materials into material sections, grind the surface through centerless grinding, and inspect the cracks; spray the qualified material sections with water-based graphite lubricant, and dry the water-based graphite lubricant;

[0052] 2) The first annealing heat treatment: heat the material section to 855°C, keep it warm for 10 hours, cool to 350°C, then take it out of the furnace, and cool it to room temperature;

[0053] 3) The material section is subjected to shot blasting treatment, followed by phosphating and saponification treatment;

[0054] 4) Place the material section on the hydraulic press for cold extrusion, and get a cross round rod blank in the mold;

[0055] 5) Use a low-carbon steel rod with a round rod head to hammer and grind the arc-shaped burr of the cross round rod-shaped blank, so that it is bent and ...

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Abstract

The invention provides a universal joint crossing shaft blank cold extrusion processing technology. The universal joint crossing shaft blank cold extrusion processing technology comprises the following steps that (1) raw materials are cut into material sections, the surfaces are ground by a center-less grinder, the qualified material sections are subjected to spraying and drying of a lubricant; (2) first time annealing heat treatment is performed, specifically, the material sections are heated to 850+ / -5 DEG C and held for 10 hours, cooled to 340+10 DEG C, and cooled to the room temperature; (3) the material sections are subjected to shot blasting and then phosphating and saponifying; (4) the material sections are placed on a hydraulic machine for cold extrusion, and a cross-shaped round bar blank is obtained in a mold; (5) circular arc-shaped burrs of the cross-shaped round bar blank is subjected to hammer grinding by using a low-carbon steel bar to form an outer convex bulge; and (6)the outer convex bulge on the surface of the cross-shaped round bar blank is ground away by using a sandpaper. According to the universal joint crossing shaft blank cold extrusion processing technology, sharp edges caused by the cutter cutting are avoided, the exposure of interior materials on the surface without the chemical treatment is avoided, and the defects of cracks, crusting, folding andthe sharp edges visible to naked eyes of an existing blank after the surface treatment are effectively solved.

Description

technical field [0001] The invention relates to the field of auto parts processing technology, in particular to a cold extrusion processing technology for a universal joint cross shaft blank. Background technique [0002] The cross shaft is also called the ten-byte, that is, the universal joint. It is a component that realizes variable-angle power transmission. It is used to change the direction of the transmission axis. It is the "joint" part of the universal transmission of the automobile drive system. The cross-shaft rigid universal joint is a variable speed universal joint widely used in automobiles, and the maximum intersection angle between two adjacent axes is allowed to be 15゜~20゜. The cross shaft is one of the key parts of the cross shaft rigid universal joint. The cross shaft is mainly used for multi-directional transmission connections of various machines, and is often used in conjunction with couplings, such as: cross shaft universal joints, etc. Since it mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14B21C23/00B21C23/32C10M173/02C10N30/06C10N30/10C10N40/24
CPCB21C23/00B21C23/32B23P15/14C10M173/02C10M2201/041C10M2201/062C10M2201/066C10M2207/08C10M2215/082C10M2219/044C10M2223/04C10M2223/049C10N2030/06C10N2030/10C10N2040/24C10N2020/06
Inventor 金关海肖汉刚张满树
Owner HANGZHOU NEW CENTURY UNIVERSAL JOINT
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