Car Seat Torsion Tube Cold Extrusion Die

Abstract

The invention discloses a cold extrusion die for a torque tube of a passenger car seat. The cold extrusion die comprises an upper die assembly, a lower die assembly and a convex hull formation assembly, wherein the upper die assembly and the lower die assembly are matched with each other and used for tightly clamping a hollow tube piece, the convex hull formation assembly is used for forming a convex hull in the hollow tube piece, and the convex hull formation assembly is connected with the upper die assembly and the lower die assembly. By means of the cold extrusion die for the torque tube of the passenger car seat, cold extrusion formation of the torque tube of the passenger car seat can be achieved, form and location tolerance precision of the convex hull at the end of the torque tube is guaranteed, and in addition, the position tolerance requirement within a certain range of each of the two ends of the whole tube piece is guaranteed; the die has sufficient strength and rigidity and can work normally under cold and hot alternating stress.

Description

technical field [0001] The invention belongs to the technical field of moulds, in particular, the invention relates to a cold extrusion die of a car seat torsion tube. Background technique [0002] The development of a cold extrusion die for torsion tubes of car seats, due to the high deformation resistance of the pipe fittings, which method to use as the actuator is a problem that needs to be solved; the cold heading extrusion of hollow parts in cold extrusion technology, At present, there are not many data available for reference; the cold extrusion process also puts forward higher requirements for the overall structure of the equipment and the mold. The equipment must not only be able to withstand greater strength, but also need to have a certain rigidity; Mold life, and meet the assembly size and strength requirements. The torsion tube of a car seat is a hollow tube with a length greater than 40mm. One or both ends of the hollow tube need to be extruded into a convex hu...

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Problems solved by technology

[0002] The development of a cold extrusion die for torsion tubes of car seats, due to the high deformation resistance of the pipe fittings, which method to use as the actuator is a problem that needs to be solved; the cold heading extrusion of hollow parts in cold extrusion technology, At present, there are not many data available for reference; the cold extrusion process also puts forward higher requirements for the overall structure of the equipment and the mold. The equipment must not only be able to withstand greater strength, but also need to have a certain rigidity; Mold life, and meet assembly size and strength requirements

The torsion tube of a car seat is a hollow tube with a length greater than 40mm. One or both ends of the hollow tube need to be extruded into a convex hull with strict shape and position tolerances, and the two ends of the tube need to meet strict position requirements in a certain area for installation. Tolerance requirements, such cold extrusion die technology is difficult to implement

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