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Mining hard alloy coal cutting teeth

A technology of hard alloy and coal cutting teeth, which is applied in cutting machinery and other directions, can solve problems such as rock dust discharge, achieve the effects of prolonging service life, protecting health, and improving continuous work efficiency

Inactive Publication Date: 2007-12-12
姚勋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coal cutter can also solve the problem of rock powder discharge during construction, reduce wear and increase service life

Method used

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  • Mining hard alloy coal cutting teeth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: As shown in Figures 1 and 2, the cemented carbide coal cutting tooth for mining is composed of a tooth body 1 and a conical head, and several convex threads 2 with the same direction of rotation are arranged on the conical head. 2 to form a concave thread 3 with the same direction of rotation.

Embodiment 2

[0013] Embodiment 2: The present invention also includes the structure shown in FIG. 3 , its head is a hemispherical crown, and the concave and convex threads on it are the same as those in Embodiment 1.

[0014] The usage of the present invention is shown in Fig. 4, and the tooth body of hard alloy coal cutting tooth A for mining is brazed in the hole at the front end of steel tooth body B, and is assembled into engineering roadheader coal cutting tooth.

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Abstract

The invention discloses a horniness metal cutting coal teeth for mine, including the taper head, the taper head is equipped with some convex thread of the same rotary direction, there is concave thread with the same rotary direction between the convex thread. After the cutting coal teeth is installed on the roller of the development machine, when constructing, the convex thread on the cutting coal teeth comes in for the continuing impact and compression resistance of the terrane, it will bring the whole cutting teeth, along screw thread the opposite rotary direction axial rotation in roller upper seat, to avoid a part of head face of cutting coal teeth has always contact with the rock and abraded, resulting in cutting coal teeth fracture. The concave thread can be used as the access for heat, rock powder and gas, to absorb the dust water that the tooth seat insufflation, to protect the teeth sharp at low temperature of the rock cutting efficiency and the overall endure milling capability of the teeth.

Description

technical field [0001] The invention belongs to hard alloy mining tools, in particular to a hard alloy coal cutting tooth for mining. Background technique [0002] At present, the heads of cemented carbide coal cutting teeth for mining are all composed of conical or hemispherical crowns with smooth conical working surfaces. Machine picks. The pick is installed in the socket of the tooth holder on the roadheader drum, and the tooth seat is welded on the roadheader drum by electric welding. When the roadheader drum rotates, the picks equipped with coal cutting teeth cut the rock formation accordingly. Since the rock wall of the rock formation resists extrusion on the smooth working surface of the coal cutting teeth cone, the picks cannot rotate in the tooth socket. As a result, a certain part of the smooth working surface of the coal cutter cone is always repeatedly worn into a plane by the rock wall, resulting in the exposure of the alloy coal cutter. At this time, the bend...

Claims

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Application Information

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IPC IPC(8): E21C35/18
Inventor 姚勋
Owner 姚勋
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