Precision polishing technique for stainless steel printed circuit board

A printed circuit board and precision polishing technology, applied in the field of electrolytic deburring treatment and precision polishing process, can solve the problems of high current density, long polishing time, affecting surface quality, etc., and achieve the effect of reasonable formula and simple and easy water treatment.

Inactive Publication Date: 2007-02-07
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high current density causes energy waste, and at the same time, it is easy to cause severe hydrogen evolution at the cathode, and the electrolysis speed of the anode is too fast. The surface is prone to streak shadows and affects the surface quality.
[0005] Lanzhou Xingye Material Protection Co., Ltd. adopts a dynamic continuous polishing method for large-area engineering electrochemical polishing of stainless steel container equipment. The solution contains chromic anhydride, and a large amount of heat is released during electrolysis. Cooling equipment must be added, which consumes energy and increases cost, and the polishing time is long, the amount of corrosion is large, and the overlapping of the polishing surface causes the overall polishing surface to be uneven
And the current density also reaches 6...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Use the stainless steel workpiece as the cathode, put NaOH and Na 2 CO 3 Perform electrolysis in the mixed solution to remove surface oil stains, and then wash with water. Then the stainless steel workpiece is used as the anode, and the lead plate is used as the cathode, and the stainless steel workpiece is put into the electrolytic solution for pretreatment electrolysis. At this time, the formula of the electrolytic solution is: (by weight), sulfuric acid 1.63%, phosphoric acid 0.58%, water 97.79% , the temperature is normal temperature, the current density is 5~10A / dm 2 , the time is 5-10 minutes, so that the large burrs remaining on the hole wall after laser cutting are removed, and the corrosion amount is within 0.001-0.002mm. After the pretreatment is completed, the stainless steel workpiece is used as the anode, and the lead plate is used as the cathode, and is electrolyzed for 1 minute in a precision electrolytic polishing solution. The formula of the electroly...

Embodiment 2

[0025] The difference between this embodiment 2 and embodiment 1 is that when the stainless steel workpiece is put into the electrolyte solution for pretreatment electrolysis in the present embodiment 2, the formula of the electrolyte solution used is: (by weight), sulfuric acid 1.64%, phosphoric acid 0.60%, water 97.76%, the temperature is normal temperature, the current density is 5~10A / dm 2 , time 5-10 minutes. After the pretreatment is completed, the stainless steel workpiece is also used as the anode, and the lead plate is used as the cathode, and is electrolyzed for 1 minute in the precision electrolytic polishing solution. The formula of the electrolyte used at this time is: (by weight), 27% sulfuric acid, 50% phosphoric acid , ammonium sulfate 0.04%, ammonium phosphate 0.01%, cellulose 0.03%, saccharin 0.006%, water 22.914%. Other processes and conditions are all the same.

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Abstract

the invention discloses a precise polishing technology of stainless steel printing circuit, which comprises the following steps: electrolyzing to remove oil; cleaning working piece; removing burr through electrolyzing; polishing; inactivating; cleaning; drying. the electrolyte at electrolyzing disposal contains 1.62-1.65% sulfuric acid, 0.56-0.60% phosphoric acid and 97.76-97.80% water. the electrolyte at electrolyzing precise polishing contains 24-28% sulfuric acid, 47-51% phosphoric acid, 0.02-0.04% ammonia sulfate, 0.01-0.03% ammonium phosphate, 0.03-0.04% cellulose, 0.005-0.007% saccharin and 21.1-28.9% water.

Description

Technical field: [0001] The invention relates to a polishing process of a stainless steel printed circuit board after laser cutting, in particular to an electrolysis deburring treatment and precision polishing process of a stainless steel printed circuit board. technical background: [0002] Electrochemical polishing technology has been widely used in the polishing treatment of stainless steel moulds, catering utensils, large stainless steel pieces, plates and pipes in recent years. Looking at the application of electropolishing technology at home and abroad, especially the steel plate with large area and thin thickness (below 0.1mm ) There is no precedent for electropolishing treatment of precision parts. The reason is that on the one hand, the current density of electropolishing treatment requiring high brightness is too high, resulting in large dimensional changes, which is not suitable for stainless steel precision products that require strict dimensional changes. On the ...

Claims

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Application Information

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IPC IPC(8): C25F3/24
Inventor 李灿权孙雅茹于锦姚思童徐炳辉刘桂珍
Owner SHENYANG POLYTECHNIC UNIV
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