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Surface treatment method of caliper piston

A surface treatment and caliper technology, which is applied in the surface treatment field of caliper pistons, can solve the problems of low production efficiency, long production cycle, and short production cycle, and achieve high production efficiency, short production cycle, and fast surface heating.

Inactive Publication Date: 2020-09-15
浙江安统汽车部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the problems of certain environmental pollution, long production cycle, and low production efficiency in the above-mentioned prior art, and provides a method for surface treatment of caliper pistons, which has the advantages of environmental protection, short production cycle, high production efficiency, and low cost. specialty

Method used

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  • Surface treatment method of caliper piston
  • Surface treatment method of caliper piston

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] like figure 1 , figure 2 In shown embodiment 1, a kind of surface treatment method of caliper piston comprises the following steps:

[0039] Step 1: Dust removal and cleaning, cleaning the caliper piston 7, and cleaning the dust and magazines in the vacuum nitriding furnace;

[0040] Step 2: Furnace and preheat the workpiece, put the caliper piston into the vacuum nitriding furnace, seal the furnace cover, and seal the vacuum nitriding furnace, connect the cathode and anode wires, and heat up the ammonia thermal decomposition furnace;

[0041] Step 3: Vacuumize the vacuum nitriding furnace by starting the vacuum pump to make the vacuum degree reach the set value. During the vacuumize process, fill a certain amount of nitrogen and hydrogen generated by the thermal decomposition of ammonia;

[0042] Step 4: Close the high-voltage switch, slowly increase the voltage, make the caliper piston light up, and heat up the surface at the same time;

[0043] Step 5: Nitriding ...

Embodiment 2

[0050]The technical solution of embodiment 2 is basically the same as the technical solution of embodiment 1, and the difference is that in step 4, the high voltage switch is closed, and the voltage is slowly increased to make the surface of the caliper piston glow, firstly with low pressure and small current Cleaning, break up the arc and turn to the heating stage after cleaning, gradually increase the flow rate of thermally decomposed ammonia gas, increase the current and voltage to accelerate the temperature rise.

Embodiment 3

[0052] The technical solution of embodiment 3 is basically the same as the technical solution of embodiment 1, the difference is: in step 4 and step 5, when the shell temperature of the vacuum nitriding furnace is higher, that is, the temperature is raised to 35°C More than above, through cooling water cooling. Cooling water is used to cool down the shell of the vacuum nitriding furnace without affecting the vacuum nitriding treatment of the caliper piston.

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Abstract

The invention discloses a surface treatment method of a caliper piston. The surface treatment method comprises the following steps of 1, dedusting and cleaning; 2, charging and preheating a workpiece;3, vacuumizing a vacuum nitriding furnace; 4, increasing the voltage to enable the caliper piston to be brightened and enable the surface of the caliper piston to be heated; 5, introducing ammonia gas into the vacuum nitriding furnace for nitriding treatment; and 6, cooling and taking out the caliper piston. The surface treatment method of the caliper piston has the advantages of being environmentally friendly, short in production period, high in production efficiency and low in cost.

Description

technical field [0001] The invention relates to the technical field of surface treatment of auto parts, in particular to a method for surface treatment of a caliper piston. Background technique [0002] The braking of the car is basically controlled by hydraulic pressure, and the brake is achieved by hydraulically driving the brake pads on the brake caliper to hold the brake disc. The brake caliper is one of the core components of the braking system. The brake caliper includes a caliper piston and a The brake pad slides in the support under the action of the pressurized fluid, and then pushes the brake pad and the brake disc to generate braking force by friction. The caliper piston and the corresponding oil cylinder are closely matched, and can slide back and forth but cannot cause brake fluid leakage when moving; during the braking process, the caliper piston and the cylinder body will slide relative to each other. During the sliding process, the outer wall of the caliper p...

Claims

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Application Information

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IPC IPC(8): C23C8/38C23C8/80
CPCC23C8/38C23C8/80
Inventor 李仪平沃春耀
Owner 浙江安统汽车部件有限公司