Separable pick-shaped cutter

Abstract

A separable pick-shaped cutter comprises a cutting pick body and a cutting pick head, wherein the cutting pick body and the cutting pick head are detachable, the cutting pick head is inserted into the top of the cutting pick body and is in shaft and steel ball fit with the cutting pick body, and steel balls under the action of bolts and compression springs are evenly arranged around the top of the cutting pick body; anti-abrasion layers are arranged on the surface of the cutting pick body and the surface of the cutting pick head, and the anti-abrasion layers are made of metal carbides compounded from chrome, vanadium and niobium metal powder and nonmetal boron and carbon compounds. According to the separable pick-shaped cutter, the cutter can rotate in the stress direction of a conical spiral surface, the cutting pick head can rotate alone under the condition that generated cutting resistance is small, and eccentric wear of a carbide bit is effectively prevented; furthermore, due to the fact that the cutting pick body and the cutting pick head are two separated parts, the cutting pick head can be replaced, the reusing rate of the cutting pick body can be increased, and resources can be saved; due to the fact that the anti-abrasion layers are arranged on the surface of the cutting pick body and the surface of the cutting pick head to effectively protect the cutting pick body and the cutting pick head, the anti-abrasion performance of the cutting pick body and the cutting pick head is improved.

Description

technical field [0001] The invention relates to the field of drilling tools for coal mining, in particular to a detachable pick-shaped pick. Background technique [0002] With the development of the economy, the performance of the pick as an important part of the shearer and the roadheader directly affects the working efficiency of the shearer and the roadheader. During the cutting process of the cutting mechanism, the cutting depth of broken coal is about 3-4cm, and the top of the pick head is a conical surface. During work, the resistance caused by bending and fire plugs between teeth sleeves is often greater than that of cutting. The frictional force on the circumferential direction of the tooth causes the entire pick to not rotate normally, resulting in extremely uneven wear of the carbide cutter head, and the eccentric wear of the carbide cutter head causes the top of the pick head to rapidly reduce in diameter, hard The high-quality alloy cutter head loses protection ...

AI Technical Summary

Problems solved by technology

During the cutting process of the cutting mechanism, the cutting depth of broken coal is about 3-4cm, and the top of the pick head is a conical surface. During work, the resistance caused by bending and fire plugs between teeth sleeves is often greater than that of cutting. The frictional force on the circumferential direction of the tooth causes the entire pick to not rotate normally, resulting in extremely uneven wear of the carbide cutter head, and the eccentric wear of the carbide cutter head causes the top of the pick head to rapidly reduce in diameter, hard The high-quality alloy cutter head loses protection and support and falls off and is scrapped. In this way, not only the service life of the pick is low, but the overall pick is scrapped, causing unnecessary waste

[0003] At present, among the disclosed rotary picks, various convex ribs are mostly distributed on the top of the pick head to generate cutting resistance to make the entire pick rotate, and relative resistance is generated between two adjacent convex ribs, so that the generated resistance is smaller. The rotation angle of the entire pick is small, or even unable to rotate, and the phenomenon of eccentric wear of the carbide cutter head has not been solved well

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