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Electrolytic polishing liquid, polishing device and polishing method

The technology of electrolytic polishing and polishing device is applied in the field of electrolytic polishing technology, which can solve the problems of operator safety threat, difficult treatment of waste water, eutrophication of water body, etc., and achieves the effect of good polishing effect and improved reaction and electrolysis speed.

Pending Publication Date: 2019-05-21
CHANGZHOU WASTON MEDICAL APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are two deficiencies in the following two aspects: 1. The electrolyte used contains phosphoric acid of traditional formula, which is not environmentally friendly, and the waste water produced is difficult to treat. Direct discharge will easily cause eutrophication of the water body and affect the water body environment
2. The cyclic operation of highly corrosive hot sulfuric acid solution requires very high corrosion resistance of the equipment, and may pose a safety threat to operators

Method used

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  • Electrolytic polishing liquid, polishing device and polishing method
  • Electrolytic polishing liquid, polishing device and polishing method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The electrolytic polishing solution of this embodiment, the electrolytic polishing solution is calculated by weight, including 18-28wt% of sulfuric acid, 20-32wt% of citric acid, 5-15wt% of tartaric acid, 1-5wt% of surfactant, and the balance is deionized water. The concentration of sulfuric acid is 98%. Surfactants are anionic surfactants. The concentrations of citric acid, tartaric acid and surfactants were all analytically pure. The surfactant is one or more of sodium stearate, sodium dodecylbenzenesulfonate and sodium lauryl sulfate.

[0038] See figure 1 and figure 2 , a polishing device of this embodiment, including a reaction vessel 1, an ultrasonic generator, an electrolyte storage tank 2 and a power supply.

[0039] The electrolytic polishing solution mentioned above is filled in the electrolyte storage tank 2 . The reaction vessel 1 is provided with a conductive plate 3 . Mounting grooves 1-6 are evenly distributed along the front and rear directions o...

Embodiment 2

[0051] The workpiece processed in this embodiment is a quenched hollow drill with a complex inner surface structure, and the material grade is 420. The composition of the electrolyte in this embodiment: 28wt% of sulfuric acid, 30wt% of citric acid, 8wt% of tartaric acid, 3wt% of sodium dodecylbenzenesulfonate, 1wt% of sodium dodecylsulfate, and 30wt% of water. The electrolyte temperature is 55°C, the voltage is 7 volts, the current density is 50A / dm2, and the electrolysis time is 30S. The ultrasonic power is 1.2KW and the frequency is 25KHZ.

[0052] Electrolysis effect: small holes, the oxide skin on the inner surface of the cutting edge is removed, and the roughness of the inner surface is significantly reduced.

Embodiment 3

[0054] The workpiece processed in this embodiment is a quenched guide frame with threaded holes, and the material grade is 17-4. Electrolyte composition: sulfuric acid 25wt%, citric acid 30wt%, tartaric acid 10wt%, sodium stearate 3wt%, sodium lauryl sulfate 2wt%, water 30wt%. The electrolyte temperature is 50°C, the voltage is 8 volts, the current density is 30A / dm2, and the electrolysis time is 100S. Ultrasonic power is 1.2KW, frequency is 28KHZ.

[0055] Electrolysis effect: the burr in the threaded hole is removed, and the oxide skin is removed.

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Abstract

The invention discloses an electrolytic polishing liquid, a polishing device and a polishing method. The electrolytic polishing liquid comprises, by weight, 18%-28% of sulfuric acid, 20%-32% of citricacid, 5%-15% of tartaric acid, 1%-5% of a surface active agent and the balance deionized water; the concentration of the sulfuric acid is 98%; and the surface active agent is an anionic surfactant. The method for adopting electrolytic polishing to remove oxide skin inside a heat treatment part small hole and burrs in a threaded hole is adopted, and the technical problem that the inner surface ofthe martensitic stainless steel small hole is difficult to polish is solved.

Description

technical field [0001] The invention relates to an electrolytic polishing process, in particular to an electrolytic polishing liquid, a polishing device and a polishing method. Background technique [0002] As we all know, after heat treatment, the surface hardness, strength and wear resistance of martensitic stainless steel are significantly enhanced, and the price is relatively cheap, so it is often used as one of the main raw materials for medical devices. On the other hand, in order to meet the convenience of clinicians, medical devices are always designed as parts with hole structure, some are blind holes, some are elongated holes, some are threaded holes and so on. As a basic requirement for medical devices, the inner surface of parts must be smooth, free from impurities such as burrs, sharp edges, and scale produced by heat treatment. Therefore, the inner surface of the small hole of this medical device must be polished to meet the quality requirements. For the inne...

Claims

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Application Information

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IPC IPC(8): C25F3/24C25F7/00
Inventor 胡晓文刘忙仔杨俊峰赵洪军刘美红
Owner CHANGZHOU WASTON MEDICAL APPLIANCE CO LTD
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