Electroplating process for high-hardness bolt

An electroplating process and high hardness technology, applied in jewelry and other directions, can solve the problems of poor electroplating quality, uneven distribution of electroplating layer, complex electroplating process, etc., and achieve the effect of long service life, uniform distribution of electroplating layer, and high electroplating quality.

Inactive Publication Date: 2018-01-19
苏州华丰不锈钢紧固件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, bolts, cylindrical threaded fasteners with nuts, are a type of fasteners composed of two parts: head and screw (cylindrical body with external threads), which need to be matched with nuts for tightening Solidly connect two parts with through holes. With the continuous improvement of science and technology, the application market of bolts is becoming wider and wider. Almost all manufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] An electroplating process for high-hardness bolts, specifically comprising the steps of:

[0015] (1) Put the bolts into the pickling tank for pickling treatment to remove the surface oxide layer. The pickling temperature is 30°C and the pickling time is 20 minutes. After completion, put the bolts into the cleaning tank to clean them;

[0016] (2) Connect the bolt to a circuit with a current of 30mA for electric shock treatment, and the electric shock time is 10 minutes;

[0017] (3) Put the bolt on the cathode of the electroplating pool, and put the high-hardness alloy on the anode of the electroplating pool, and the current density in the electroplating pool is 2mA / cm 2 , the electroplating temperature is 60°C, and the electroplating time is 6min.

Embodiment 2

[0019] An electroplating process for high-hardness bolts, specifically comprising the steps of:

[0020] (1) Put the bolts into the pickling tank for pickling treatment to remove the surface oxide layer. The pickling temperature is 50°C and the pickling time is 10 minutes. After the completion, put the bolts into the cleaning tank to clean them;

[0021] (2) Connect the bolt to a circuit with a current of 50mA for electric shock treatment, and the electric shock time is 5 minutes;

[0022] (3) Put the bolt on the cathode of the electroplating pool, and put the high-hardness alloy on the anode of the electroplating pool, and the current density in the electroplating pool is 10mA / cm 2 , the electroplating temperature is 20°C, and the electroplating time is 14min.

Embodiment 3

[0024] An electroplating process for high-hardness bolts, specifically comprising the steps of:

[0025] (1) Put the bolts into the pickling tank for pickling treatment to remove the surface oxide layer. The pickling temperature is 40°C and the pickling time is 15 minutes. After completion, put the bolts into the cleaning tank to clean them;

[0026] (2) Connect the bolt to a circuit with a current of 40mA for electric shock treatment, and the electric shock time is 7.5min;

[0027] (3) Put the bolt on the cathode of the electroplating pool, and put the high-hardness alloy on the anode of the electroplating pool, and the current density in the electroplating pool is 6mA / cm 2 , the electroplating temperature is 40°C, and the electroplating time is 10min.

[0028] Wherein, the cleaning tank in the step (1) is cleaned by ultrasonic waves.

[0029] The high-hardness alloy in the step (2) is a copper-zinc alloy.

[0030] After the electric shock treatment in the step (2), use in...

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PUM

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Abstract

The invention discloses an electroplating process for a high-hardness bolt. The electroplating process specifically comprises the following steps of: putting the bolt into a pickling tank to perform pickling treatment to remove a surface oxide layer, and then, putting the bolt into a cleaning tank to clean, wherein a pickling temperature is 30-50 DEG C and picking time is 10-20 minutes; accessingthe bolt into a circuit with current of 30-50 mA to perform electric shock treatment for 5-10 minutes; putting the bolt to a cathode of an electroplating tank, and putting high-hardness alloy to a cathode of the electroplating tank, wherein current density in the electroplating tank is 2-10 mA/cm<2>, an electroplating temperature is 20-60 DEG C, and electroplating time is 6-14 minutes. In this way, the electroplating process can improve hardness performance of the bolt surface, and is long in service life; and moreover, an electroplating layer on the surface of the bolt can be uniformly distributed, so that electroplating quality is high.

Description

technical field [0001] The invention relates to a processing method, in particular to an electroplating process for high-hardness bolts. Background technique [0002] As we all know, bolts, cylindrical threaded fasteners with nuts, are a type of fasteners composed of two parts: head and screw (cylindrical body with external threads), which need to be matched with nuts for tightening Solidly connect two parts with through holes. With the continuous improvement of science and technology, the application market of bolts is becoming wider and wider. Almost all manufacturing industries need to use bolts, so the performance requirements for bolts are getting higher and higher. In order to improve product performance, it is often necessary to electroplate a functional layer on the surface of the bolt, but the current electroplating process is too complicated, and the electroplating quality is poor, and the electroplating layer is often unevenly distributed. Contents of the invent...

Claims

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Application Information

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IPC IPC(8): C25D7/00C25D5/34
Inventor 徐建华
Owner 苏州华丰不锈钢紧固件有限公司
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