A kind of manufacturing method of self-propagating diamond engraving grinding head

Abstract

The invention discloses a self-propagating diamond carving grinding head which comprises the two parts of a working layer and a base body. The working layer comprises a bonding agent and a grinding material, the bonding agent is prepared from, by weight, 10-45 parts of Ti powder, 10-25 parts of Al powder, 5-10 parts of Ni powder, 15-60 parts of Cu powder, 2-5 parts of Sn powder and 0-10 parts of Co powder, and the grinding material is diamond, wherein the concentration of the grinding material ranges from 60% to 130%, and the particle size of the grinding material ranges from 25 / 30 to 230 / 270 mesh. The invention further discloses a manufacturing method of the self-propagating diamond carving grinding head. By means of the method, chemical bonding is formed between diamond and the metal bonding agent; meanwhile, densification of a carving grinding head blank is completed by means of a self-propagating reaction, and holding strength of the metal bonding agent to the diamond grinding material is improved.

Description

Technical field [0001] The invention belongs to the field of diamond grinding heads, and specifically refers to a self-propagating diamond carving grinding head and a manufacturing method thereof. Background technique [0002] At present, there are three main manufacturing methods for diamond carving grinding heads: electroplating, sintering and high-temperature brazing. [0003] When the diamond engraving grinding head is made by electroplating method, because the diamond abrasive is only mechanically embedded in the coating metal, the coating metal has a low holding strength against the diamond abrasive, and the diamond exposure height is low, and its surface has no more than three layers. Abrasives limit the processing efficiency and service life. In addition, the electroplating waste generated in the manufacturing process can cause serious pollution to the environment. [0004] When using the sintering method to make a diamond engraving grinding head, because it is difficult to...

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Problems solved by technology

[0003] When electroplating method is used to make diamond engraving grinding head, since the diamond abrasive is only mechanically embedded in the coating metal, the coating metal has low holding strength on the diamond abrasive, the diamond exposure height is low, and its surface has no more than three layers. Abrasives, which limit processing efficiency and service life

In addition, the electroplating waste liquid generated during the manufacturing process will cause serious pollution to the environment

[0004] When using the sintering method to make the diamond engraving grinding head, because the diamond abrasive is difficult to form a chemical bond with the matrix metal, the diamond abrasive is only mechanically embedded in the matrix metal, and the matrix metal has low holding strength to the diamond, and the diamond is not easy to be exposed , which limits its sharpness and prevents its service life from being improved

In addition, the graphite mold used in the hot pressing sintering process is easily damaged and the cost is high

[0005] When the brazing method is used to make the diamond engraving grinding head, the single-layer brazing diamond engraving grinding head uses the high-temperature brazing method to achieve a firm grip on the abrasive through the chemical metallurgical reaction between the abrasive, the brazing material and the matrix, making it It has significant advantages such as high abrasive holding strength, large chip space, and high processing efficiency. However, due to the limitation of the brazing process itself, there is no subsequent abrasive supplement after the single-layer abrasive is consumed, so that its service life cannot be further improved.

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