Boom-type roadheader cutting head suitable for hard rock

Abstract

The invention relates to a boom-type roadheader cutting head suitable for hard rock. The boom-type roadheader cutting head is characterized in that material guide plates are welded to a cutting head main body, and the material guide plates and pick holders are arranged from the front end to the tail end along the cutting head main body in a spiral line form correspondingly; cutting picks at the front part of the cutting head main body are front-section cutting picks, the taper of the front-section cutting picks is 70-75 degrees, and the angle of conical heads at the front ends of the front-section cutting picks is 108-112 degrees; and cutting picks at the rear part of the cutting head main body (1) are rear-section cutting picks, the taper of the rear-section cutting picks is 78-82 degrees, and the angle of conical heads at the front ends of the rear-section cutting picks is 108-112 degrees. According to the boom-type roadheader cutting head suitable for the hard rock, the cutting picks are more reasonable in stress, so that the failure rate of the cutting head is reduced, and the working efficiency of a boom-type roadheader is improved.

Description

technical field [0001] The invention belongs to the technical field of metal mine development and recovery engineering equipment, and in particular relates to a cutting head for a cantilever roadheader. Background technique [0002] In the field of metal mine development and recovery engineering, the broken rock formations are mostly stable and hard rock formations with indistinct joint development. Cantilever roadheaders are the main equipment for mechanical excavation of metal mine roadways. The cutting head of the cantilever roadheader is often damaged and malfunctioned during excavation. And mechanical failure will affect the production and construction progress. [0003] The cutting head is the direct contact part between the cantilever roadheader and the hard rock. During the excavation operation, the cutting head is rotated by the engine to drive the pick installed on the tooth seat of the cutting head to penetrate into the rock. When the roadheader cuts the broken ...

AI Technical Summary

Problems solved by technology

When the roadheader cuts the broken hard rock opening, the existing cutting head requires that the mechanical power should not be too large, and at this time the pick cone angle is relatively large (the pick cone angle is generally about 80°, and the cone head angle is generally 120° left and right), low power combined with large cone angle leads to poor mechanical cutting and rock breaking ability

After normal excavation, the large cone angle of the pick has low penetration into hard rock, low rock-breaking cutting ability, and poor overall work efficiency

[0004] On the other hand, the existing cutting head rubs against the hard rock for a long time without interruption, and the picks are affected by the large cone angle, and the distance between them is relatively large. When the cutting head is working and drilling, the picks cannot be continuously and evenly stressed

Lead to excessive wear of the pick (mainly manifested as eccentric wear), and the failure rate of the cutting head is significantly increased

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