Unlock instant, AI-driven research and patent intelligence for your innovation.

Automobile wheel hub pressing-in type shaft head processing method

A technology of automobile wheels and processing methods, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as fracture, bad working environment of parts, major failures, etc., achieve the effect of simple process route and avoid overheating

Inactive Publication Date: 2015-07-29
CHENGDU LINGCHUAN SPECIAL IND
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the drive axles of medium-sized trucks manufactured in China are mostly composed of the middle section of the cast axle housing and the press-fit shaft heads at both ends. Since this piece is subjected to heavy bending and torsional impact loads during use, the components The working environment is harsh, and when a serious heavy load impact occurs there, it is easy to break in the weak link and cause a major failure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for processing a press-in axle head of an automobile wheel, which is used for processing and manufacturing a press-in axle head of an automobile wheel made of 40Gr alloy steel. The processing method includes the following steps in sequence: blanking, heating, extrusion forming, Rough machining, heat treatment and finish machining, characterized in that the heating step is medium frequency induction heating, and the medium frequency induction heating is to heat the blank obtained by blanking to temperature T within a time t, and the time t is between 35s-50s The temperature T is between 1135°C and 1150°C.

[0019] In the present invention, the limitation of each parameter in the heating step is aimed at avoiding too long residence time of the blank in the heating furnace during the medium frequency induction heating process, resulting in excessively large austenite grains in the blank, while avoiding overheating, overburning and Severe surface decarburization oc...

Embodiment 2

[0021] This example is further limited on the basis of Example 1: as a heat treatment implementation that can refine grains, eliminate structural defects, and improve mechanical properties, the heat treatment includes normalizing, quenching, and tempering in sequence, The normalizing heating temperature is between 850°C-870°C, the normalizing time is not less than 60min, the quenching temperature is between 860°C-875°C, the quenching time is between 90min-110min, and the tempering temperature is between Between 610°C and 620°C, the tempering time should not be less than 130min.

[0022] As a way to achieve a low quenching crack rate, the quenching is brine cooling.

[0023] Preferably, the concentration of cooling brine in quenching is between 5% and 7%.

[0024] In order to shorten the average processing cycle of a single qualified product and ensure product quality, a flaw detection step is also included between the heat treatment step and the finishing step.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an automobile wheel hub pressing-in type shaft head processing method, which is used for processing and manufacturing an automobile wheel hub pressing-in type shaft heads made of 40Gr alloy steel materials. The processing method sequentially comprises the following steps of blanking, heating, extrusion forming, coarse processing, heat processing and fine processing, and is characterized in that the medium frequency induction heating is adopted in the heating step, according to the medium-frequency induction heating, blanks obtained in blanking is heated to the temperature T in the time t, the time t is between 35s and 50s, and the temperature T is between 1135 DEG C and 1150 DEG C. The process route is favorable for improving the product quality of the pressing-in type shaft head.

Description

technical field [0001] The invention relates to the field of processing technology of automobile wheel hub connectors, in particular to a method for processing an automobile wheel hub press-in type shaft head. Background technique [0002] At present, the drive axles of medium-sized trucks manufactured in China are mostly composed of the middle section of the cast axle housing and the press-fit shaft heads at both ends. Since this piece is subjected to heavy bending and torsional impact loads during use, the components The working environment is harsh, and when a serious heavy load impact occurs there, it is easy to break in the weak link and cause a major failure. [0003] In the prior art, the material of the above press-in shaft heads is mostly 40Gr, and the parameters such as the tensile strength, yield strength, and elongation of the finished product are important indicators for the quality of the press-in shaft heads, which are directly related to the use of the press-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23P15/00C21D1/18
CPCC21D9/0068C21D1/42
Inventor 杨军张军叶维敏汪庭文何晓鸣
Owner CHENGDU LINGCHUAN SPECIAL IND