Technique method for electroplating inner surfaces of gear wheel holes and dedicated equipments

A process method and electroplating process technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of shielding layer environmental pollution, complex operation procedures, and affecting the performance of coatings, so as to save equipment investment costs, simplify process steps, and improve production efficiency. high efficiency effect

Inactive Publication Date: 2003-10-08
SHANGHAI UNIV
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Problems solved by technology

The traditional method of partial electroplating or partial electrodeposition of some parts is the partial shielding method, that is, some parts that do not need to be electroplated are sealed with epoxy resin or paraffin wax, and then electroplated. After the end, the shielding layer needs to be removed by chemical or mechanical methods. This method causes complicated operation procedures, low production efficiency, and will cause environmental pollution and may affect the performance of the coating when removing the shielding layer.

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  • Technique method for electroplating inner surfaces of gear wheel holes and dedicated equipments
  • Technique method for electroplating inner surfaces of gear wheel holes and dedicated equipments
  • Technique method for electroplating inner surfaces of gear wheel holes and dedicated equipments

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Embodiment 1

[0021] Embodiment 1: The technological process of gear inner hole surface electroplating of the present invention, its technological process comprises the following each procedure: gear is installed on the special fixture-metal cleaning agent degreasing-water washing-electrolytic degreasing-water washing-30% hydrochloric acid solution immersion Corrosion—water washing—electroplating—water washing—deionized water cleaning—drying—high temperature dehydrogenation, which is characterized in that the electroplating process adopts a bipolar electroplating method; the fixture for installing gears is not only a fixture for clamping gears, but more importantly, It is a special device for electroplating electroless plating deposition. In the electroplating process, the composition of the bipolar electroplating tin bronze bath is: cuprous cyanide 11-13 g / L, sodium stannate 21-24 g / L, sodium cyanide 45-50 g / L, sodium hydroxide 22-26 g / L.

[0022] see figure 1 Schematic diagram of the ele...

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Abstract

A technology and special apparatus for electroplating the inner surface of gear hole is disclosed. The said technology features use of bipolar electroplating method. Its electroplating liquid contains cuprous cyanide, sodium stannate, sodium cyanide and sodium hydroxide. A central anode rod of said special apparatus passes through several gears to hange them in the electroplating liquid for electroplating them after DC is applied across anode and cathode. Its advantages are uniform plated layer and high productivity.

Description

technical field [0001] The invention relates to a process method and a special device for gear inner hole surface electroplating, and belongs to the technical field of electroplating chemistry. Background technique [0002] In some industrial sectors, in some special occasions, some parts need to be treated with different requirements, and some surfaces that do not need to be treated need to be partially protected. For example, in order to improve the lubricity and wear resistance of the inner hole surface of the gear In order to ensure the stability, a special layer of coating needs to be plated in the inner hole. At the same time, the surface of the gear itself is not required to be electroplated during the inner hole electroplating process, that is to say, only partial electroplating occurs in the inner hole of the gear. The traditional method of partial electroplating or partial electrodeposition of some parts is to use the local shielding method, that is, to seal some p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/04C25D17/08C25D17/12
Inventor 成旦红徐伟一
Owner SHANGHAI UNIV
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