Extrusion forming equipment and process for square tube for rear fork

Abstract

The invention discloses extrusion forming equipment and process for a square tube for a rear fork. A workbench, an extrusion hydraulic cylinder and a linear state pipe fitting guide seat are included,the linear state pipe fitting guide seat is installed at the left end of the workbench, the extrusion hydraulic cylinder is installed at the right end of the workbench, am adjustment station is arranged on the left side of the linear state pipe fitting guide seat, an eccentric wheel pressing mechanism is arranged on the right side of the linear state pipe fitting guide seat, and the eccentric wheel pressing mechanism is fixedly mounted on the workbench. The eccentric wheel pressing mechanism can press the square tube to be subjected to extrusion forming, the square tube and bakelite are better matched, the conditions of wrinkling, shriveling, pocking marks and the like generated after the square tube is extruded are effectively avoided, and the square tube forming effect is improved. Meanwhile, the overall rear fork extrusion process can be used for sequential and cycled batch production, the production efficiency of the square tube of the rear fork is improved, and the extrusion accuracy of the square tube of the rear fork is improved.

Description

technical field [0001] The invention relates to the technical field of material forming, in particular to a square tube extrusion forming equipment and process for a rear chainstay. Background technique [0002] The rear chainstay is one of the important parts of a motorcycle or an electric vehicle, and it basically consists of two symmetrically arranged frame bars and a connecting rod arranged between the frame bars. It forms an H-shaped structure through the frame rod and the connecting rod, and is connected to the frame and the rear axle to play the role of support and connection. [0003] However, when the existing rear flat fork square tube is produced and extruded, due to the diversion of the extrusion force, the profile will form an extrusion weld, resulting in the failure of the material properties to be fully utilized, and the overall mechanical properties are reduced, such as bending resistance and fatigue properties. The level is not high, and then there will be ...

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Problems solved by technology

[0003] However, when the existing rear flat fork square tube is produced and extruded, due to the diversion of the extrusion force, the profile will form an extrusion weld, resulting in the failure of the material properties to be fully utilized, and the overall mechanical properties are reduced, such as bending resistance and fatigue properties. The level is not high, and then there will be wrinkles, pits and pits on the surface of the rear flat fork square tube after forming, and every time the profile is extruded, the extrusion equipment is not convenient for the adjustment or adjustment of the other tube or the extruded product. Positioning, resulting in low extrusion accuracy in the later stage, and the quality of the rear flat fork square tube profile is not high

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