Straightening device for large-diameter material of cold header and straightening method

Abstract

The invention discloses a straightening device for the large-diameter material of a cold header and a straightening method. The straightening device comprises a wire rod component, a pressing frame and a support wheel, wherein the wire rod component is matched with the pressing frame; a rolling shaft straightening frame A, a rolling shaft straightening frame B and a roller straightening frame are sequentially arranged between the wire rod component and the support wheel; and the rolling shaft straightening frame A, the rolling shaft straightening frame B, the roller straightening frame and the support wheel are in a coaxial structure. In the invention, an optimal combination method of rolling shaft straightening and roller straightening is adopted to achieve the aim of straightening the multi-directional multi-radian curved form of the material before cold heading, thus, the large-diameter material can be quickly straightened in a short path and the elastic rebound of the heading product can be effectively reduced, and the yield or the yield of secondary processing is improved; in the straightening method, the headed material is placed on the wire rod component in a wire rod form and then pulled to sequentially enter the multi-dimensional rolling shaft straightening frame A and rolling shaft straightening frame B and the roller straightening frame under the restriction and guidance of the pressing frame so as to finish the material straightening; and finally, the material enters the body of the cold header.

Description

technical field [0001] The invention relates to a cold heading machine assembly, in particular to a straightening device and a straightening method for large-diameter materials of the cold heading machine. Background technique [0002] The metal cold heading process is a non-cutting process, and the multi-station automatic cold heading machine processing is a continuous processing mode, so the processed object generally enters the process in the form of a disc. [0003] The specifications of the processed object of the multi-station automatic cold heading machine cover a diameter of 5 to 33 mm, or even close to 40 mm. [0004] The upsetting metal material undergoes hot rolling, rounding, cooling and logistics processes, and the material inevitably produces multi-dimensional stress, which also forms the physical effect of multi-directional and multi-arc bending of the material, and finally forms the initial bending condition as a space bending model. The projection plane is ...

AI Technical Summary

Problems solved by technology

[0006] Cold heading is a process of strong constraint cold forging and extrusion. If the alignment of materials before heading is not sufficient, it will have a negative impact on the quality of high-demand heading parts. The most intuitive thing is that elastic rebound will occur after heading, which will affect the second part of the product. Secondary processing can easily lead to defective products

Secondly, the bending of the material will seriously affect the dragging of the feeding wheel to the processed material and the length measurement accuracy, and it is easy to cause the instability of the feeding displacement size

cause poor product size

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