High-impact-resistance and high-wear-resistance polycrystalline diamond composite cutting pick and manufacturing method thereof

Abstract

The invention discloses a high-impact-resistance and high-wear-resistance polycrystalline diamond composite cutting pick. The high-impact-resistance and high-wear-resistance polycrystalline diamond composite cutting pick comprises a steel body, a diamond pick head, a plug ring and a hard alloy lantern ring, wherein a pick hole is formed in the top of the steel body, the bottom of the diamond pick head is contained in the pick hole, and the middle of the diamond pick head is of a circular truncated cone structure with the upper bottom face area smaller than the lower bottom face area; the piston ring sleeves outside the circular truncated cone structure in the middle of the diamond pick head, the piston ring is pressed into an annular gap between the diamond pick head and the pick hole, the hard alloy lantern ring sleeves on the conical surface of the conical section at the front part of the steel body and wraps the piston ring, the head part of the diamond pick head protrudes out of the hard alloy lantern ring, and the diamond pick head, the plug ring, the steel body and the hard alloy lantern ring are connected through welding. According to the high-impact-resistance and high-wear-resistance polycrystalline diamond composite cutting pick, the high impact resistance of the pick head in the drilling, excavating and milling processes can be ensured, and meanwhile, the wear resistance of the diamond cutting pick is improved.

Description

technical field [0001] The invention relates to the technical field of cutting or cutting tools, in particular to a polycrystalline diamond composite pick with high impact resistance and high wear resistance and a manufacturing method thereof. Background technique [0002] Roadheaders, shearers, rotary drilling rigs and milling machines are widely used in various coal mines, tunnel excavation, road milling and other engineering constructions. The picks are installed on the tooth holders of the above-mentioned engineering equipment as the main accessories and consumable parts for drilling, cutting and crushing minerals, rocks and pavement materials. The cemented carbide pick (hereinafter referred to as "alloy pick") widely used at present is connected by the pick base (steel body, tooth body) and the carbide tooth head by brazing. The steel body is made of 30CrMnTi, 30CrMnSi, 40CrNiMo, 42CrMo, etc. In the use of cemented carbide picks, there are problems such as low wear re...

AI Technical Summary

Problems solved by technology

At present, there are many improvement measures such as: cold press interference fit, hot press interference fit, flame brazing, induction brazing, vacuum diffusion welding, etc. to try to solve this problem, but the effects are uneven and the improvement is not sufficient

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