Novel general blind hole boring cutter bar

Abstract

The invention discloses a novel general blind hole boring cutter bar. The novel general blind hole boring cutter bar comprises a cutter bar main body and a boring cutter head. The surface of the cutter bar main body is provided with elastic pressing plates and screw countersinking grooves, and each elastic pressing plate and the corresponding screw countersinking groove are of an integrated type structure. The surface of the boring cutter head is provided with a long groove. The long groove is connected with an end socket arranged at one end of each elastic pressing plate in a matched manner.According to the technical scheme, the positioning mode of the super 'six-point positioning principle' is adopted in structural design for clamping the boring cutter head, and reliability of positioning constraining is improved; 'three-point positioning' constraining is adopted between lower planes of the boring cutter head, and 'four-point positioning' constraining is adopted between 90-degree V-shaped long grooves; two repetition points or over-positioning points among seven positioning points, and stability, firmness and reliability are achieved among structures in the machining process through positioning constraining; and by means of front angles and inclined top faces of the tongue-shaped elastic pressing plates and countersinking portions of compression screws, the chipping storagespace is effectively enlarged, and the effect that chippings can be discharged conveniently is achieved.

Description

technical field [0001] The invention belongs to the technical field of blind hole processing, in particular to a novel universal blind hole boring bar. Background technique [0002] There are existing technical solutions for blind hole processing, one is to press the side of the oblique hole to press the blind hole boring tool bar, and the other is to clamp and weld the boring tool head with the universal boring tool holder; [0003] The side of the oblique hole presses the boring bar for blind holes. Due to structural limitations, only one screw presses the boring head from the side of the bar. The direction of the pressing force is perpendicular to the force direction of the boring head. From the mechanical principle , There is a factor that the boring head is not pressed tightly, which makes the positioning and clamping of the boring head unstable and unreliable. In practice, the phenomenon of "knife sticking" often occurs in the cutting process, so the "knife sticking" ...

AI Technical Summary

Problems solved by technology

[0003] The side of the oblique hole presses the boring bar for blind holes. Due to structural limitations, only one screw presses the boring head from the side of the bar. The direction of the pressing force is perpendicular to the force direction of the boring head. From the mechanical principle , there is a factor that the boring head is not pressed tightly, which causes the positioning and clamping of the boring head to be unstable and unreliable

In practice, the phenomenon of "knife sticking" often occurs in the cutting process, so the "knife sticking" of the boring head is unavoidable, and because the compression screw protrudes outside the tool holder, the phenomenon of winding and hanging chips cannot be avoided, resulting in Eliminate the situation that the chip space becomes smaller and the chip removal is unfavorable;

[0004] The method of clamping and welding the boring head of the universal boring tool holder has a structural problem of the radial offset of the overall center of mass of the boring tool holder, which cannot run at high speed, which affects the processing efficiency and surface quality of the part. The welding boring head is due to the assembly conditions of the boring tool holder Limitation, the diameter of the head of the boring head is generally small, so the rigidity is insufficient, the depth of the knife is shallow during rough machining, and the machining efficiency is low

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