Subsection composite pick-shaped mining pick

Abstract

The invention relates to a sectional composite pickax-shaped excavation cutting pick. A metallic hard alloy supporting seat 2 which is of high hardness and high wear resistance is arranged on the upper part of the cutting pick, wherein, the upper part of the hard alloy supporting seat 2 is a cylinder or a cone frustum body, and the cone angle ranges from 0 degree to 20 degree; and the lower part of the hard alloy supporting seat 2 is a cylinder smaller than the diameter at butt end of the upper cylinder or the cone frustum body, the connecting part thereof and the end face of the cylinder are processed by the operation of round angle transition, and the middle of the lower cylinder is provided with an annular groove 3. An umbrella type hard alloy cutter head 4 or a common hard alloy cutter head 5 is connected with the hard alloy supporting seat 2 through the method of coat casting or braze welding, and a tooth body 1 and the hard alloy supporting seat 2 are connected through the method of coat casting or welding or coat casting and welding. The cutting pick has the beneficial effects that the cutting pick consists of the following three different materials, i.e. the hard alloy cutter head, the supporting seat for the hard alloy cuter head and the tooth body, different requirements of the various parts of the cutting pick on performance are fully met, and the service life of the cutting pick is prolonged.

Description

Technical field [0001] The invention relates to a mining pick-shaped excavation pick, which is specially used for excavation machines such as coal mining, mining, and tunneling. Background technique [0002] The pick-shaped mining pick is a common consumable accessory for coal mining, mining, tunneling and other tunneling machinery. The pick is composed of a tooth body and a hard alloy cutter head and is connected by brazing. The tooth body first requires high strength and impact toughness, and at the same time, the tooth body head must have high hardness and wear resistance. In actual work, both the cemented carbide cutter head and the tooth body supporting the cemented carbide cutter head will be worn. It is known from metal materials science that for the same metal material, the hardness and impact toughness are negatively correlated. When the body has high strength and toughness, the hardness of the tooth body is generally about HRC45, while the hardness of the cemented...

AI Technical Summary

Problems solved by technology

In actual work, both the cemented carbide cutter head and the tooth body supporting the cemented carbide cutter head will be worn. It is known from metal materials science that for the same metal material, the hardness and impact toughness are negatively correlated. When the body has high strength and toughness, the hardness of the tooth body is generally about HRC45, while the hardness of the cemented carbide cutter head is generally above HRC70. Due to the huge difference in hardness and wear resistance between the two, the cemented carbide in actual use The cutter head only has less wear, but the tooth part supporting the carbide cutter head has a lot of wear, which makes the supporting strength drop sharply, causing the carbide cutter head to fall off

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