A boring tool for fine boring the axial through hole of the turntable

Abstract

A boring tool for precisely boring rotary table axial through holes comprises a tool handle and a tool head, the tool head comprises 2-4 tool teeth, a scrap discharging groove extending in the axial direction is formed between every two adjacent tool teeth, each tool tooth comprises a progressive cutting tooth and a main cutting tooth located under the progressive cutting tooth, the cutting face of each progressive cutting tooth is a trapezoid spiral face, the two waist edges of the cutting face of each progressive cutting tooth are a nominal cutting edge and a progressive cutting edge respectively, and each progressive cutting edge is arranged under the corresponding nominal cutting edge in the spiral direction of the cutting face of the corresponding progressive cutting tooth. The cutting face of each main cutting tooth is a spiral curved face, the edge extending towards the tail end in a spiral mode on each cutting face is a main cutting edge, the main cutting edge inclines towards the axis of the tool head, and the spiral directions of the main cutting tooth and the progressive cutting tooth are consistent. The boring tool is divided into the progressive cutting part and the main cutting part, so that three disc faces of a rotary table can be integrally machined, tool changing or combination of three parts of the rotary table are not needed, machining timeliness is improved, and the high machining efficiency of numerical control machining is fully utilized.

Description

technical field [0001] The invention relates to a machine tool tool for fine boring, in particular to a boring tool for the axial through hole of a fine boring turntable, which belongs to the field of machining metal cutting. Background technique [0002] As one of the key components of the rotary tablet press, the turntable is divided into three layers: the upper punch plate, the middle die plate, and the lower punch plate. Take one size as an example: there are dozens of φ22+0.010mm vertical through holes on the upper end surfaces of the upper punching plate and the lower punching plate, which are used to install the upper and lower punches. The same number of coaxial holes of φ26+0.030mm and 22+0.010mm as the upper and lower punching plates are distributed on the end surface of the middle die plate, which are used to install the middle die. It is required that the corresponding coaxiality tolerance of the through hole on the upper punch plate, the φ26 hole on the middle ...

AI Technical Summary

Problems solved by technology

[0004] Due to the short service life of existing tools, although advanced CNC machining centers can be used to improve machining accuracy

However, compared with the original processing method, the assembly process after separate processing is added, and it takes a long time to ensure the coaxiality of the corresponding apertures on the three disk surfaces during assembly, so it cannot highlight CNC machining. The advantage of high efficiency

[0005] The problem to be solved by the present invention is to provide a long-life special cutting tool to process the turntable as a whole, avoiding the state of separate processing of the turntable due to the short life of the existing cutting tool

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