Shaft part two-roller flexible oblique rolling forming device and method

Abstract

The invention relates to the technical field of metal plastic forming processes and equipment, and provides a shaft part two-roller flexible oblique rolling forming device and method. The device comprises two oblique rollers, a guide plate, two guiding cylinders and an axial pushing device; the oblique rollers can do motions including same direction rotation, radial feeding and oblique angle adjustment; the guide plate is arranged between the two oblique rollers and is used for limiting radial movement of a blank; the two guiding cylinders are arranged on the two sides of the two oblique rollers to limit swing of the blank; and the axial pushing device is arranged at one end of the blank and applies axial thrust to the blank, the blank is rolled into a shaft part in a space formed by the oblique rollers and the guide plate. The method includes radial compression, roller tilting, oblique rolling diameter reduction and roller leveling forming processes. The shaft part two-roller flexibleoblique rolling forming device and method have the advantages that forming equipment is simple, the tonnage is small, flexible production can be achieved, and core loose defects can be reduced even avoided.

Description

technical field [0001] The invention relates to the technical field of metal plastic forming technology and equipment, in particular to a two-roller flexible skew rolling forming device and method for shaft parts. Background technique [0002] As one of the most basic parts for transmitting motion and power, shaft parts have been widely used in many industrial fields such as automobiles, rail transit, ships, and construction machinery. Because plastic forming has the advantages of improving structure performance, increasing material utilization rate, and high production efficiency, shaft parts are mostly produced by plastic forming process. For small and medium-sized shaft parts with large batches, more and more cross-wedge rolling processes are used for production. However, for shaft parts with many varieties and small batches, especially larger shaft parts, there are mainly plastic forming methods such as free forging, rapid forging, and precision forging. [0003] There...

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Problems solved by technology

[0005] There are existing three-roll skew rolling forming methods for railway vehicle axles (CN201810034928), Numerical analysis of the skew rolling process for main shafts (DOI: 10.1515 / amm-2015-0068), and other forming methods. The forming method is three-roll skew rolling Roll forming does not have the ability of flexible rolling, the equipment structure is complicated, the cost is high and the degree of automation is low

Existing forming methods for hollow shaft parts (201310661153.6), Method forrotary compression of hollow parts by cross rolling (EP2422896B1), Method forplastic forming of toothed shafts (EP2422898B1), A method of rolling extrusion with regulated pp etmmical axis of stemmical axis-spacing Parts (EP2842649B1) forming method, because the roll has no tilt angle, the forming method is mainly cross rolling or extrusion cross rolling, resulting in excessive axial thrust and large tonnage required for equipment

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