A two-roll flexible skew rolling forming device and method for shaft parts

Abstract

The invention relates to the technical field of metal plastic forming technology and equipment, and provides a two-roller flexible skew rolling forming device and method for shaft parts. The device includes 2 skew rolls, guide plates, 2 guide cylinders and axial pushing device; the skew rolls have co-rotation, radial feed and tilt angle adjustment movement; the guide plate is arranged between the 2 skew rolls, limiting The radial movement of the billet; two guide cylinders are arranged on both sides of the two skew rolls to limit the swing of the billet; the axial pushing device is arranged at one end of the billet to apply axial thrust to the billet, and the billet is moved between the skew rolls and the billet. The space formed by the guide plate is rolled into shaft parts. The method of the invention includes radial compression, roll tilting, skew rolling reduction, and roll leveling forming processes. The invention has the advantages of simple forming equipment, small tonnage, flexible production, slowing down or even avoiding core loose defects and the like.

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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