A kind of manufacturing process of master cylinder piston
A technology of master cylinder piston and manufacturing process, which is applied in the field of master cylinder piston manufacturing technology, which can solve the problems of low pass rate, insufficient surface strength and short service life of the piston, so as to improve precision, quality and pass rate, and improve quality control The effect, the production process is meticulous and clear
Active Publication Date: 2019-10-01
大昌汽车部件股份有限公司
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Problems solved by technology
The small piston is related to the quality of the car and the safety of the passengers. The piston moves in a harsh environment for a long time, and it will vibrate or even jump, which is easy to cause damage. If the precision is not high and the surface strength is not enough, the damage of the piston will be accelerated. , affecting driving safety
The existing production technology does not have a set of scientific and perfect production process for the production of the main cylinder piston, the qualified rate of the produced piston is low, and the service life is short
Method used
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[0022] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment, see figure 1 —2: A manufacturing process of a master cylinder piston, comprising the following steps: (1) incoming inspection; (2) fine turning; (3) rough grinding; (4) fine grinding; (5) polishing; (6) surface treatment ; (7) Finished product inspection; (8) Packing and storage.
[0023] (1) Incoming goods inspection: the chemical composition is tested first, and the percentage of each component content is used as the reference standard for testing according to the following range:
[0024] Cu: 0.15-0.4;
[0025] Si: 0.4-0.8;
[0026] Mg: 0.8-1.2;
[0027] Cr: 0.04-0.35;
[0028] Ti: ≤0.15;
[0029] Mn: ≤0.15;
[0030] Fe: ≤0.7;
[0031] Zn: ≤0.25;
[0032] Impurities: ≤0.15;
[0033] Al: margin.
[0034] Compare the results of the raw material testing with the above reference standards, and then conduct the second inspection after passing...
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Abstract
The invention particularly relates to a manufacturing process of a master cylinder piston. The manufacturing process of the master cylinder piston includes the steps of receiving inspection, specifically, the chemical components of a bar material are tested, and the mechanical performance is tested; finish turning, specifically, the bar material is subjected to finish turning according to size requirements; rough grinding, specifically, the outer circle is subjected to rough grinding, and the roughness is Rz 4; finish grinding, specifically, the outer diameter is subjected to finish grinding,and the roughness is Rz 2; polishing, specifically, the outer circle is polished, and the roughness is Rz 1.5; surface treatment, specifically, the master cylinder piston is subjected to hard anodizing, and it is required that the film thickness is 20+ / -5 micrometers, and the hardness is HV0.015>=420; and finished product detection, specifically, the cylindricity is 0.02 mm, the roughness is Rz 2.4, the film thickness is 10-20 micrometers, the film hardness is HV0.025>=400, and the 168h salt spray test is higher than or equal to the level 9.The production process is detailed and clear, the production efficiency and quality control effect are improved, and therefore the precision, quality and pass rate of products are improved. Due to the hard anodizing, the performance of products is greatly improved, the service life of products is prolonged, and traveling safety is improved.
Description
technical field [0001] The invention relates to a production method of a piston, in particular to a production process of a master cylinder piston. Background technique [0002] The automobile brake master cylinder is an important part of the automobile brake system. Its function is to push the oil into the brake cylinder through the piston of the brake master cylinder to realize the braking of the automobile while driving. The small piston is related to the quality of the car and the life safety of the passengers. The piston will vibrate or even jump when it moves in a harsh environment for a long time, which is easy to cause damage. If the precision is not high and the surface strength is not enough, the damage of the piston will be accelerated. , affecting driving safety. The existing production technology does not have a set of scientific and perfect production process for producing the master cylinder piston, the qualified rate of the produced piston is low and the ser...
Claims
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IPC IPC(8): C22C21/08B23P15/10C25D11/08
Inventor 潘菁潘松辉
Owner 大昌汽车部件股份有限公司