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Coal and rock cutting pick

A cutting tooth, said technology, applied in the field of cutting teeth, can solve problems such as failure, hindering rotation, etc.

Inactive Publication Date: 2003-09-24
AGE MINING SERVICES PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that the teeth do malfunction after they are locked into their holders due to the microscopic dust produced, preventing rotation

Method used

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  • Coal and rock cutting pick
  • Coal and rock cutting pick
  • Coal and rock cutting pick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] Referring to the drawings, there is disclosed a cutting tooth 1 having a cutting head 2, shank 3 and fixed (inner) end 4 for securing the cutting tooth 1 to a cutting tooth holder 11 . exist Figure 1 to Figure 10 In the present invention, the cutting tooth holder 11 is welded to the helical deflector 9 which is in turn welded to a drum 10 . In these figures, the fixed end 4 is T-shaped and adapted to be slidably and rotatably fitted and fixed in the groove of the cutting tooth holder 11 on the helical deflector 9 of the drum 10 . Drums can be used with cutters or continuous miners.

[0065] Preferably, the entirety of the cutting tooth 1 is made of a homogeneous non-connected alloy steel strip consisting of low alloy steel 4340, gas hardened and tempered to about 60HR'C' Rockwell surface hardness. Preferably, in Figure 11A, B, 12A, B, 15A, B and 16A, the cutting teeth shown in B are used to cut coal, while Figure 13A , B and 14A, the cutting teeth shown in B ar...

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PUM

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Abstract

The cutting tooth (1) comprises a radially inner end (4) and a shank (3) fixed to said drum (10) so as to substantially prevent relative movement between them. This cutting tooth (1) also comprises a cutting head (2), and this cutting head (2) has a front surface (5) and a trailing surface (6), and said front surface (5) and said trailing surface The surfaces (6) intersect to form a cutting edge (8) extending substantially parallel to the axis. In use, said front surface (5) is inclined with respect to a radius of said axis at an acute front angle R, said trailing surface (6) with respect to a radius passing through said edge (8) and perpendicular to said Say the plane of the radius is inclined by an acute rear clearance angle B. Said leading surface (5) and trailing surface (6) are inclined into an acute angle, and, when said shank is fixed on said drum (10), said shank is relative to said The radius extends at an acute angle.

Description

technical field [0001] This invention relates to coal mining, and more particularly to cutting teeth for mining coal and rock. Background technique [0002] Typically, on a miner or cutter with a rotating cutting drum, rows of teeth are spaced apart and used to mine coal and rock. The teeth cut the coal wall surface as they come into contact with the coal wall surface during rotation of the drum. [0003] Currently available teeth are in the shape of a tapered tool and have a pointed tool tip. The conical teeth do not actually cut, but rather break up the coal wall surface, resulting in low levels of coarse product being mined, and also high levels of airborne dust particles. In fact, these operations generate dust and small pieces (particles), which require continuous water spraying in order to comply with "occupational safety and health" conditions. These tiny dust particles pose a health risk to underground miners. Because some particle sizes fall into the carcinogeni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C25/10E21C35/18E21C35/19
CPCE21C35/18E21C35/19E21C35/188E21C35/1837
Inventor 艾伯特·丹尼尔·达乌德
Owner AGE MINING SERVICES PTY LTD