Brush plating technology for restoring rolling-mill gear shaft by using pulse electric brush plating

A technology of gear shaft and pulse electricity, which is applied in the field of brush plating to achieve the effects of cost reduction, good wear resistance and high bonding strength

Inactive Publication Date: 2014-12-24
无锡市森信精密机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is little research on the repair of the strain of the herringbone gear shaft at present, and there is no simple and effective repair method at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A pulse electric brush plating technique for repairing rolling mill gear shafts includes:

[0032] (1) Wash the gear shaft

[0033] Bake the surface with a small fire with a welding torch, so that all the micropores on the surface and the oil storage at the junction appear and burn off. The brush-plated area is cleaned with acetone to remove the oil stains and then flatten the strained workpiece with a file or oil stone. The edges, burrs, and parts that do not need to be repaired are covered with plastic.

[0034] (2) Electric cleaning

[0035] Use clean liquid, the power supply is positively connected, the voltage is 15V, the time is 20s, and the beads are rinsed with tap water.

[0036] (3) Activation

[0037] Activate with the activation solution once, the power supply is connected, the voltage is 12V for 15s, remove the oxide film on the surface of the workpiece, and rinse it with tap water.

[0038] Use activation solution twice to activate, reverse the power supply, voltage ...

Embodiment 2

[0045] The pulse electric brush plating repairing rolling mill gear shaft brush plating process of the present invention includes:

[0046] (1) Wash the gear shaft

[0047] Bake the surface with a small fire with a welding torch, so that all the micropores on the surface and the oil storage at the junction appear and burn off. The brush-plated area is cleaned with acetone to remove the oil and then use a file and oil stone to flatten the strained workpiece. The edges, burrs, and parts that do not need to be repaired are covered with plastic.

[0048] (2) Electric cleaning

[0049] Use clean fluid, the power supply is positively connected, the voltage is 12V, the time is 30s, rinse with tap water to clean the beads.

[0050] (3) Activation

[0051] Activate with the activation solution once, the power supply is connected, the voltage is 15V for 20s, remove the oxide film on the surface of the workpiece, and rinse it with tap water.

[0052] Use activation solution twice to activate, rever...

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PUM

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Abstract

A related brush plating technology for restoring a rolling-mill gear shaft by using pulse electric brush plating comprises (1) cleaning the gear shaft; (2) performing electric purifying; (3) activating; (4) performing brush plating on a bottom layer; and (5) performing brush plating on a working layer. A plating repaired by the technology is uniform in surface, free of cracks, free of burrs, and free of cracking and stripping phenomena. The pulse electric brush plating technology is capable of effectively reducing the tensile stress of the plating and even obtaining pressure stress, thereby substantially improving the thickly plating capacity of brush plating, the single-side plating thickness reaches 1 mm or more, and the combination strength is high. The restored gear shaft well runs, the cost is reduced and the economic benefit is improved.

Description

Technical field [0001] The invention relates to the technical field of brush plating, in particular to a brush plating process for repairing rolling mill gear shafts by pulse electric brush plating. Background technique [0002] φ400 rolling mill is a kind of rolling mill commonly used in rolling mills. The rolling mill often uses 40Cr as its herringbone gear journal material. This kind of herringbone gear journal will cause large area strains due to oil pollution during work. There are both shallow strains ranging from 0.01mm to 0.03mm and deep strains up to 2.5mm deep. As a result, the herringbone gear journal cannot work normally and the rolling mill cannot be produced. In particular, some parts with severe damage such as gear shafts of large rolling mills are expensive (few or no spare parts), and the processing cycle is long. For units that are in production, it is impossible to replace new parts in terms of economy or time. Accepted. [0003] The strain on the herringbone ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/06C25D5/02C25D5/34C25D5/18
Inventor 华兆红
Owner 无锡市森信精密机械厂
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