Electric spark-mechanical compound shaping method of metal bindnig agent extra hard abradant sand wheel

A metal bond and super-hard abrasive technology, which is applied in the field of EDM-mechanical composite shaping, can solve the problem of exceeding the gap between the anode and cathode, and achieve the effect of meeting the requirements of use.

Inactive Publication Date: 2006-06-14
HUNAN UNIV
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  • Application Information

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Problems solved by technology

However, the EDM shaping in previous reports is mainly aimed at fine-grained grinding wheels, but not coarse-grained grinding wheels. This is because the gap between the positive and negative poles must be kept within a certain range during EDM shaping. , which may cause the gap between the Yin and Yang poles to exceed this range

Method used

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  • Electric spark-mechanical compound shaping method of metal bindnig agent extra hard abradant sand wheel
  • Electric spark-mechanical compound shaping method of metal bindnig agent extra hard abradant sand wheel
  • Electric spark-mechanical compound shaping method of metal bindnig agent extra hard abradant sand wheel

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Experimental program
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Embodiment Construction

[0031] Bronze bond superabrasive grinding wheel with grain size of 100 / 120# is adopted, the diameter of the grinding wheel is 200mm, and the width is 10mm.

[0032] Compound shaping is carried out on a high-speed surface grinder with a maximum grinding wheel speed of 100m / s.

[0033] EDM-mechanical compound shaping conditions:

[0034] (1) EDM shaping device:

[0035] ① Tool electrode: a flat electrode made of brass;

[0036] ②Working fluid: high-speed water-based grinding fluid;

[0037] ③Power supply: high-frequency DC pulse power supply, the voltage is 60V, 90V, 120V three levels, the maximum peak current is 20A, the duration of high level: 1μs-100μs, the duration of low level: 1μs-100μs, the voltage limiting resistance is 18Ω;

[0038] ④ Carbon rod brush system;

[0039] (2) Mechanical shaping device: GIN-DTM100 braking silicon carbide roller dresser made in Taiwan;

[0040] In the stage of electric spark shaping, the reciprocating plate type electric spark shaping meth...

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Abstract

An electrospark-mechanical method for shaping the abrasive disc made of metallic binder and superhard abrasive material includes such steps as electrospark shaping until the electrospark can not be generated, mechanical shaping by brake-type silicon carbide roller for removing all projected abrasive particles, alternatively repeating said steps for 2 hr, lowering the electric parameters, and sequentially repeating said steps until its shaping accuracy reaches 6 microns.

Description

technical field [0001] The invention relates to a shaping method of a metal-bonded superabrasive grinding wheel, and further refers to an electric spark-mechanical compound shaping method thereof. Background technique [0002] With the increasingly wide application of hard and brittle materials such as cemented carbide, engineering ceramics, optical glass, hardened steel and semiconductors, its high-efficiency and precision machining technology has become one of the current research hotspots, and grinding is the most effective tool for such materials. Processing methods are also becoming more and more important in the entire field of mechanical processing. [0003] However, due to the characteristics of high strength, high hardness and high brittleness of such materials, the grinding force is large, the grinding temperature is high, and the grinding efficiency is low during the grinding process, and it is easy to cause the passivation of the grinding wheel. The machining pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H5/04B23H5/10
Inventor 盛晓敏尚振涛宓海青王树启吴耀谢桂芝易了
Owner HUNAN UNIV
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