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Production process of ball pin

A production process and ball stud technology, which is applied in the field of mechanical processing, can solve problems such as ball stud breakage and ball stud cracks, and achieve the goals of reducing hot brittleness, improving surface hardness, high wear resistance and tensile strength Effect

Active Publication Date: 2019-03-19
ZHEJIANG TONGSHI AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the ball stud is the main component of the connection force in the suspension system, its strength must be strong enough, otherwise it is easy to crack during use, and the ball stud manufactured by the above cold heading process, after cold heading Once the force is not well controlled during the upsetting process, it is easy to cause cracks on the ball stud, then the stress applied to the ball stud by foreign objects during the use of the ball stud is easy to concentrate at the crack, so it is easy to cause the ball stud to be damaged. pin break

Method used

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  • Production process of ball pin
  • Production process of ball pin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: The ball stud is cooled and quenched in two stages of initial cooling and final cooling. In the initial cooling stage, the ball stud is sprayed at a spraying speed of 5 L / min m², and the ball stud is cooled to 600- After 700 degrees Celsius, switch to a final cooling spray speed of 8 L / min•m² to spray the ball stud until the ball stud cools to room temperature.

Embodiment 2

[0059] Example 2: The ball stud is cooled and quenched in three stages: initial cooling, intermediate cooling and final cooling. In the initial cooling stage, the ball stud is sprayed at a spraying speed of 3 L / min•m², and the ball stud is cooled. After reaching 600-700 degrees Celsius, switch to an intercooling spray speed of 6 L / min•m² for spraying, and then switch to a final cooling spraying speed of 8 L / min•m² after the ball stud cools to 300-400 degrees Celsius Spray until the ball stud cools to room temperature.

Embodiment 3

[0060] Example 3: The ball stud is cooled and quenched in three stages: initial cooling, intermediate cooling and final cooling. In the initial cooling stage, the ball stud is sprayed at a spraying speed of 4 L / min•m², and the ball stud is cooled. After reaching 600-700 degrees Celsius, switch to an intercooling spray speed of 7 L / min•m² for spraying, and then switch to a final cooling spray speed of 9 L / min•m² after the ball stud cools to 300-400 degrees Celsius Spray until the ball stud cools to room temperature.

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Abstract

The invention discloses a production process of a ball pin, and relates to machining technologies. The production process of the ball pin is used for solving the problem that a common ball pin is prone to breakage. The production process comprises the following steps that (1) material selection and blanking are carried out; (2) forging and strengthening are carried out, and specifically a metal raw material in the step (1) is heated to 700-750 DEG C and then undergoes hot forging; (3) rough blank shaping is carried out, and specifically the forged metal is heated to 850-890 DEG C again, and then undergoes rolling shaping by using a die; (4) rough blank grinding is carried out; (5) heat treatment is carried out; and (6) post-processing is carried out. The production process of the ball pinhas the following advantages and effects that the ball pin formed through hot forging and rolling is not prone to crack due to the technological problem in the manufacturing process, then the ball pinis not prone to breakage due to stress concentration at the cracking position in the using process, moreover, the ball pin has relatively high surface hardness while the toughness of the core part isreserved by adopting the forming mode, then the fatigue damage is not prone to occurrence in the using process of the ball pin, and then the breakage is further not prone to occurrence.

Description

technical field [0001] The invention relates to mechanical processing technology, in particular to a production process of a ball stud. Background technique [0002] The ball stud is a widely used component in the independent suspension system of automobiles. The end of the control arm or thrust rod in the suspension system is usually equipped with a ball stud for connecting with other components, so that in the process of control The up and down beating and steering movement of the wheels are realized in the middle. [0003] At present, the Chinese invention patent with the authorized notification number CN103600013B discloses a cold heading forming process for metal parts. The process includes: a) metal bar blanking positioning; b) pier thickness; c) ball head forming; Upsetting hole; f) Spherical cold heading perforation. [0004] Since the ball stud is the main component of the connection force in the suspension system, its strength must be strong enough, otherwise it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C21D1/18C21D1/28C21D9/00F16C11/06
CPCB23P15/00C21D1/18C21D1/28C21D9/0068F16C11/06
Inventor 童服仁林童
Owner ZHEJIANG TONGSHI AUTO PARTS
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