Deep hole automatic boring head

Abstract

The invention discloses a deep hole automatic boring head and belongs to the field of machining. The deep hole automatic boring head is a machining tool of a deep hole and the inner surface of a steel pipe. According to the boring head, a main shaft is used as a foundation, the front end is a boring part, and the back end is a rolling part. A front end knife base and an advance-retreat knife cone block are connected integrally in a hooking mode to be embedded into the main shaft. The advance-retreat knife cone block has concentric reducer taper, so that an advance-retreat knife device which can achieve retreating knife stretching and advancing knife storing is formed. An advance-retreat knife pulling rod penetrates through the middle portion. Through alternating effects of compressed air and a backspring, a retreating knife cone block is driven to slide front and back, and automatic knife stretching and storing are achieved. The position of the retreating knife cone block is defined by the position of a knife adjusting nut, and the rotating machining diameter of a knife is determined. Accordingly, the knife adjusting nut, a locking nut, the advance-retreat knife pulling rod and the advance-retreat knife cone knife block form a precision knife adjusting device. The back end main shaft is connected with a rolling knife formed by a rolling adjusting nut, a supporting sleeve, a pressure bearing, a roller way retaining device, a pin roller and the like in a sleeved mode. The deep hole automatic boring head for front boring and back rolling is formed.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and relates to a tool for processing deep holes and inner surfaces of steel pipes by boring and rolling. Background technique [0002] Boring and rolling is a commonly used processing method for processing deep holes and the inner surface of steel pipes. [0003] 1 Remove the machining allowance on the inner surface by rotating the boring tool to scrape and boring, and correct the hole. [0004] 2. The inner surface is extruded through the rolling knife hole to produce a small plastic deformation, thereby reducing the surface roughness and improving the surface hardness, and completing the deep hole processing. [0005] The existing boring head does not have a precision tool adjustment system, and it is difficult to match workpieces with different materials and different precision requirements. Only one tool can be matched with one kind of workpiece, resulting in high production costs. [0...

AI Technical Summary

Problems solved by technology

[0005] The existing boring head does not have a precision tool adjustment system, and it is difficult to match workpieces with different materials and different precision requirements. Only one kind of workpiece can be matched with one kind of tool, resulting in high production costs

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