Cold rolling forming method for automotive hub bearing ring part with L-shaped cross section

Abstract

The invention relates to a cold rolling forming method for an automotive hub bearing ring part with an L-shaped cross section. The cold rolling forming method for the automotive hub bearing ring part with the L-shaped cross section is characterized by comprising the following steps of (1) designing and producing a ring blank, namely confirming the ring blank shape and size according to a ring part size and a rolling rate, performing blanking, heating, upsetting, punching and punching the wed through bar materials and forming into a cold rolling ring blank; (2) designing hole types, namely confirming sizes of a driving roller and a spindle-shaped chamber according to the shape and the size of the ring part and designing working surface radial sizes of the driving roller and a spindle according to the ring blank size, cold rolling deformation conditions and device parameters; (3) performing cold rolling forming, namely arranging a machined driving roller and a machined spindle into a cold rolling ring machine, putting a machined ring blank into the cold rolling ring machine, reasonably distributing the spindle feed speed and the feed amount according to three stages such as high-speed rolling, medium speed rolling and low speed rolling to perform control and enabling the cold rolling process to be ended when the external diameter of the measured ring part achieves a preset value. The cold rolling forming method for the automotive hub bearing ring part with the L-shaped cross section has the advantages of being capable of enabling reasonable design and effective control of cold rolling forming technologies of the hub bearing ring part with the L-shaped cross section to be achieved, guaranteeing stable cold rolling forming, reducing rejection rates during cold rolling and being high in production efficiency, low in production cost and good in production quality.

Description

technical field [0001] The invention relates to a cold rolling forming method for an L-shaped cross-section automobile hub bearing ring. Background technique [0002] Automobile hub bearing rings usually have complex cross-sectional shapes, and the L-shaped cross-section is one of the typical cross-sectional shapes. Ring cold rolling is an advanced plastic processing method to obtain high-precision and high-performance bearing rings through continuous local plastic deformation at room temperature. Due to the cross-sectional shape characteristics, the L-shaped cross-section automotive hub bearing rings have complex metal flow filling and geometric motion changes during the cold rolling process, and defects such as insufficient cross-section contours and butterfly shapes often occur. Therefore, at present, L-shaped cross-section automobile wheel hub bearing rings are all obtained by cold rolling with a rectangular cross-section, and then cut to obtain a cross-sectional profil...

AI Technical Summary

Problems solved by technology

Due to the cross-sectional shape, the L-shaped cross-section automotive hub bearing rings have complex metal flow filling and geometric motion changes in the cold rolling process, and defects such as insufficient cross-section contours and butterfly shapes often occur.

Therefore, at present, L-shaped cross-section automobile wheel hub bearing rings are all obtained by cold rolling with a rectangular cross-section, and then cut to obtain a cross-sectional profile shape. Cutting wastes a lot of materials and processing man-hours, and destroys the distribution of metal streamlines on the surface of the ring. Weaken the mechanical properties of the ring, resulting in low material utilization, low efficiency, high cost, and poor product quality in the production of L-shaped cross-section automotive hub bearing rings

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