Forming process of car seat connecting plate

Abstract

The invention discloses a forming process of a car seat connecting plate. The process is characterized by including the following process steps of firstly, punching locating holes, wherein a long-bar-shaped sheet of which the thickness ranges from 3mm to 10mm is placed on a continuous die, and the locating holes are formed in the two sides of the sheet respectively; secondly, punching assembly holes in the two sides, wherein the gap of single edges between the inner wall surfaces of two female dies and the outer wall surfaces of corresponding punches is set into the range from 0.25mm to 0.5mm, and the first assembly holes and the second assembly holes are punched; thirdly, punching middle assembly holes, wherein the gap of single edges between the inner wall surfaces of the two female dies and the outer wall surfaces of the corresponding punches is set into the range from 0.25mm to 0.5mm, and the third assembly holes are punched; fourthly, conducting semi-shearing, the outer contour of the car seat connecting plate is punched on the sheet, and the outer contour line of the car seat connecting plate is made to sink downwards by 1mm to 2mm; fifthly, conducting blanking, wherein a material is completely cut off along the outer contour line formed in the fourth step, and then a finished product is formed. When the gap of the single edges between the inner wall surfaces of the two female dies and the outer wall surfaces of the corresponding punches is set to be 5% to 10% of the thickness of the sheet through experimental control, the one-time punching process can be achieved, and the defects that the traditional technology secondary punching process is high in the requirement for accuracy of equipment, the production difficulty is large, production cost is high, the yield is low, materials are wasted, and the punches are not uniform in stress, severe in abrasion and short in service life are overcome.

Description

technical field [0001] The invention relates to a stamping process, in particular to a forming process of a connecting plate of an automobile seat. Background technique [0002] Stamping is a method of forming and processing workpieces of required shape and size by applying external force to plates, strips, pipes and profiles through punches and dies to cause plastic deformation or separation. Stamping parts are formed by applying external force to plates, strips, pipes and profiles by presses and molds to cause plastic deformation or separation to obtain workpieces (stamping parts) of required shape and size. [0003] Among the steel products in the world, 60-70% are plates, most of which are stamped into finished products. The body, chassis, fuel tank, radiator fins of the car, the steam drum of the boiler, the shell of the container, the iron core silicon steel sheet of the motor, and the electrical appliance are all stamped. There are also a large number of stamping pa...

AI Technical Summary

Problems solved by technology

The defects in the above-mentioned punching process are: a. Two times of punching are used. Since the second punching is carried out on the basis of the first punching, it is necessary to ensure the concentricity of the second punching punch and the small hole , so the accuracy requirements for the equipment are very high, resulting in difficult production and high production costs; b. In actual production, the above-mentioned two-time punching is generally performed through a continuous die, and the secondary punching punch and the small hole are often used during continuous feeding. The occurrence of non-concentricity causes deviation between the final formed hole and the actual required hole, resulting in low yield and waste of materials; c. Due to the above-mentioned non-concentricity, when the second fine punching is performed, punch The head is biased to the side of the small hole for punching, the force on the punch is uneven, the wear is particularly serious, and its life is only about 1000 times

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