Coring device for large shaft

Abstract

The invention relates to a coring device for a large shaft. An outer circle of a tubular cutter bar (1) is provided with a longitudinal slot (10) and a transverse slot (11), a lever (5) is arranged in the transverse slot (11) on the outer circle of the tubular cutter bar (1) through a pin shaft (6), a cam (4) is arranged in the left end of the larger-size corresponding position in the longitudinal slot (10), a spring (3) is arranged between a pull rod (2) and the cam (4), one end of the lever (5) is provided with a cutter (7), the other end of the lever (5) is arranged in a chute of the cam (4), and the ends of the tubular cutter bar (1) are provided with three supports (8) along the outer circle. The coring device for the large shaft, disclosed by the invention, has a simple structure, and can cut off the large shaft at the middle part to core the large shaft without drilling through the large shaft in a large shaft coring process; thus, the machining depth of a trepanning tool is reduced, the machining difficulty is reduced, the machining time is saved, the damage to a cored shaft is reduced, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to mechanical processing devices, in particular to a large shaft coring device. Background technique [0002] When some large-scale shaft parts are manufactured, in order to ensure the material, some materials need to be taken from the center of the shaft for testing. The method adopted in the market is to drill a through hole at the center of the shaft with a casing drill, take out the core left by the casing, and take materials in sections from one end to the middle of the core length for testing. Because the length of large-scale shaft parts is often 5-6 meters, or even more than 10 meters, in order to test the material from the center and reduce the processing difficulty of the trepanning drill, the hole diameter of the material has to be increased, which weakens the stiffness of the shaft to a certain extent. And the processing difficulty of deep hole is big, and time is long, and work efficiency is low. Contents of the in...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the above disadvantages and provide a large-scale shaft coring device, which solves the problem that large-scale shaft parts can take out the core from the middle part without drilling through, and reduces the size of the hole. Processing difficulty, shorten processing time, improve work efficiency

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