Tunneling machine, cutting portion thereof and cutting method

Abstract

The invention discloses a cutting portion of a tunneling machine. The cutting portion is characterized in that front-surface hobbing cutters are mounted on the front surface of a cutter head, a cutter arm support is mounted on the back surface of the cutter head, a first retractable cutter arm, a second retractable cutter arm, a third retractable cutter arm and a fourth retractable cutter arm are mounted on the cutter arm support, and chamfering hobbing cutters are mounted on the first retractable cutter arm, the second retractable cutter arm, the third retractable cutter arm and the fourth retractable cutter arm; the first retractable cutter arm and the second retractable cutter arm are respectively parallelly retractably arranged along the positive and negative directions of an X axis, the third retractable cutter arm and the fourth retractable cutter arm are respectively parallelly retractably arranged along the positive and negative directions of a Y axis, and the rotation axis of the cutter head is perpendicular to a plane formed by the X axis and the Y axis. The invention further discloses the tunneling machine and a cutting method. The cutting portion, the tunneling machine and the cutting method have the advantages that the diameter of the cutting portion of the tunnel machine can be varied, so that the diameters of the sections of tunnels can be varied, chamfering operation can be implemented, and the cutting portion and the tunneling machine are high in variable amplitude; the chamfering diameters are large, so that personnel can assuredly pass the tunnels, and maintenance and gear replacement can be implemented.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a cutting part of a roadheader, a roadheader and a cutting method. Background technique [0002] The cutting part of the roadheader is one of the most important components of the roadheader, and it is a rock-breaking tool for cutting rock walls. In order to reduce the vibration of the cutter head and reduce the noise, the CN201310285359 patent discloses "a design method for a segmented cutting cutter head of a retractable multi-blade expanding hob". [0003] like figure 1 As shown, the cutter head still retains the original positive hob 4 and center hob 7, removes all the side hobs at the edge of the original cutter head, and installs the first, second, and third retractable multi-blade expansion hobs respectively. Components 2, 5, 10. The first, second and third telescopic multi-blade expanding hob assemblies 2, 5 and 10 all include a telescopic multi-blade expanding hob ...

AI Technical Summary

Problems solved by technology

In order to solve the problems of small change in the diameter of the cut tunnel section and the small diameter of the formed tunnel, the inconvenience of personnel entering the front of the construction, the difficulty of maintenance and gear replacement, and the low cutting efficiency

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