Apparatus and method for two-roll skew rolling forming of round bar

Abstract

The invention relates to the technical field of metal plastic forming processes and equipment, and provides a two-roller skew rolling forming device and method for round bar. The device comprises twoinclined rollers, a guide plate, a feeding end guide cylinder and a discharge end guide cylinder; the two inclined rollers are arranged in a staggered and inclined manner, the axes of the two inclinedrollers are in the same included angle with the axis of the round bar; the guide plate is fixedly arranged between the two inclined rollers, the round bar rotates between the two inclined rollers; the feeding end guide cylinder is arranged on the feeding side and is used for limiting swinging of to-be-rolled round bar, the discharging end guide cylinder is arranged on the discharging side and isused for limiting swinging of the rolled round bar. The two inclined rollers do same-direction constant-speed rotation motion, the round bar do rotation around an axis and axial feed movement in the space formed by the two inclined rollers and the guide plate under the action of the friction force of the rollers / round bar, and the large-diameter round bar is skew rolled into a small-diameter roundbar. The device and method has the advantages of being simple in forming equipment, high in forming precision, short in technological process and low in production cost, and is suitable for rolling process of medium and small batch round bars.

Description

technical field [0001] The invention relates to the technical field of metal plastic forming technology and equipment, in particular to a round bar two-roll cross rolling forming device and method. Background technique [0002] Round bar has a large number of applications in the national economy and is an important basic raw material in the field of metal plastic forming technology and equipment technology. The forging forming process is widely used because the material is in a state of multi-directional compressive stress and strain, which can improve the plastic deformation inside the metal. However, it has limitations such as large equipment investment, low forming accuracy, and low production efficiency. It is generally suitable for large-diameter round bars. Ingot blanking; rolling forming uses the idea of ​​"rolling instead of forging", and uses multiple rolls to precisely form round bars. Due to the high yield and precision that can meet the requirements, it has been ...

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Problems solved by technology

The forging forming process is widely used because the material is in a state of multi-directional compressive stress and strain, which can improve the plastic deformation inside the metal. However, it has limitations such as large equipment investment, low forming accuracy, and low production efficiency. It is generally suitable for large-diameter round bars. Ingot blanking; rolling forming uses the idea of ​​"rolling instead of forging", and uses multiple rolls to precisely form round bars. Due to the high yield and precision that can meet the requirements, it has been well promoted and applied. It is the main preparation process of bars at present, mainly including multi-stand two-roll row type, two-roll continuous rolling type and three-roll continuous rolling type, planetary rolling, spiral rolling, etc., but the equipment is more complicated, resulting in higher input costs , generally put into production in the mass production of round bars with small and medium diameters in steel plants

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