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Method for relieving stress before plating whole chain

A technology for assembling stress and chain, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problem of no effective method to eliminate the overall electroplating assembly stress of the chain, and achieve the effect of beautiful and uniform appearance.

Inactive Publication Date: 2005-04-13
许长荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that there is no effective way to eliminate the assembly stress of the chain before the overall electroplating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) The chain parts (outer chain plate, inner chain plate, pin shaft, sleeve, roller) after conventional heat treatment are not subjected to surface treatment, including electroplating and color treatment, and are directly assembled into the assembly machine ( root or bar) body chain.

[0013] (2) Coil the whole chain one by one and place them neatly in the wire basket.

[0014] (3) Put 2 / 3 capacity of N68 mechanical oil into the tempering oil tank, and raise the temperature to 150°C; put it into a wire basket, keep it at 150°C for 2 hours, take out the wire basket, and drain the oil.

[0015] (4) Put the wire basket drained of oil into weak alkali boiling water and boil for 5 minutes, take out the wire basket, and drain the weak alkali water. The aforementioned weak alkaline water is prepared by adding 20 grams, 5 grams, and 0.5 grams of sodium nitrite, sodium carbonate, and washing powder per liter of water, respectively.

[0016] (5) Put the wire basket into the sa...

Embodiment 2

[0019] The steps of embodiment 2 are exactly the same as embodiment 1, the difference has the following points:

[0020] What the tempering medium adopted in the step (3) is No. N32 mechanical oil, and the heat preservation temperature is 125 DEG C;

[0021] The time of boiling in weak alkaline water in step (4) is 8 minutes;

[0022] The saponification time in step (5) is 8 minutes, adopts hot air drying.

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Abstract

The stress eliminating process for assembled chain before electroplating includes the following steps: setting assembled chain inside metal basket; tempering the metal basket with chain at 125-150 deg.c for 2 hr; and draining tempering medium. The said stress eliminating process can avoid crack the chain produces during and after electroplating, while making the chain maintaining its tensile strength and being beautiful, durable and superior to chain assembled after electoplating.

Description

technical field [0001] The invention relates to a method for assembling stress relief, specifically a heat treatment method before the overall electroplating of the chain, so as to eliminate the assembly stress of the chain plate, so that the chain plate does not crack when the entire chain is electroplated or after electroplating. Affects the tensile strength of the chain. Background technique [0002] The chain is a commonly used flexible part for transmitting power. Most of the use occasions are in the exposed visual state. Therefore, the chain is required to have a beautiful appearance and withstand a certain amount of tension, such as bicycle chains, motorcycle transmission chains, etc. . In order to meet the dual requirements of the chain, the common method at present is to first heat-treat the parts that make up the chain to improve the mechanical properties and wear resistance of the chain parts, so that the chain can meet the mechanical requirements; then part of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/30C21D9/00C25D5/34
Inventor 许长荣
Owner 许长荣
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