Compound mill

Abstract

The invention discloses a compound mill. A roller (1) is positioned on a base (8) through bearings (5), a cylindrical space is arranged inside the roller (1), one end of the roller (1) is closed by a stopper (2), the other end of the roller (1) is firstly provided with a tubular blank (4) and extends into a roll shaft (3) with an annular groove, a die comprises the roller (1), the stopper (2) and the roll shaft (3), the roller (1) drives the blank (4) to rotate at an angular speed 1 under the drive of external force, friction force is generated between the roll shaft (3) and the blank (4) by means of pressure P, and the roll shaft (3) rotates at an angular speed 2 and further has the functions of axial reciprocation and radial reciprocation. When the axis O2-O2 of the roll shaft (3) is misaligned with the axis O1-O1 of the roller, the blank (4) is embedded by the aid of offset, and the inner wall of the blank (4) is broached and shrunk in compound milling and extrusion, so that the blank (4) becomes a qualified workpiece with an external cylindrical surface and an internal annular groove. Afterwards, the roll shaft (3) radially returns, stops rotating and axially returns, the stopper advances (pushes the workpiece out of the roller) and returns, all technical processes for machining one workpiece are continued to be completed rapidly and automatically by means of mechanical, electrical and hydraulic integration, production efficiency is improved, labor intensity is reduced, chipless machining is realized, and metal materials are saved.

Description

technical field [0001] The invention relates to a method and equipment for processing the inner wall of a tubular metal part; more specifically, the blank in the roller is rolled through a roller-shaft mold with an annular groove, Realize the shrinkage cavity at the same time of the expansion hole, so that the inner wall forms the annular groove required by the design; so the present invention is called a compound roller rolling machine. technical background [0002] The hole-enlarging method of tubular parts in metal materials has been used in the forging industry; published by Machinery Industry Press in 1991, "Forging and Compression Forming Theory and Technology" edited by Lu Yan, etc. P150-157; published by Machinery Industry Press in 1993, "Forging Handbook / Volume 3 / Forging Workshop Equipment" P516-523 edited by Yu Xinlu, the Forging Society of the Chinese Mechanical Engineering Society; have successively announced the principles, structures, technical parameters and r...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the processing method of the annular groove of the inner diameter of the pipe generally adopts the cutting process of lathe and boring machine, which not only has low work efficiency, but also produces iron filings and wastes materials.

[0004] To sum up, there is still a lack of a kind of rolling motion through the cylindrical outer mold and the inner mold of the roller shaft, which can achieve hole expansion and shrinkage at the same time, so that the inner wall of the workpiece can meet the design requirements. Various annular grooves, A compound roller rolling machine that implements chip-free processing, which not only saves costs, but also improves work efficiency

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