Method for manufacturing cold-drawing formed sealing pad

Abstract

The invention discloses a method for manufacturing a cold-drawing formed sealing pad. The method comprises the following steps that firstly, a strip is manufactured, wherein one end of a steel belt (1) is coiled, and a braided rope (2) is cut off according to the length of the steel belt (1) and placed in the coiled steel belt to be wrapped tightly; secondly, a drawing die is fixed to a lathe; thirdly, drawing die formation is carried out, wherein the strip partially makes contact with the drawing die, the included angle of 7-15 degrees is formed between the strip and the center line of the drawing die, and then a part is drawn and manufactured in the drawing die of the lathe; fourthly, the part is straightened. In the step of drawing die formation, the lathe is in a self-acting feed mode, the strip can pass through the drawing die at a constant speed, the cross section of the strip is firstly drawn to be circular, and then the strip is drawn to be the part in a needed shape. Parts machined according to the method are good in size consistency, the oversize phenomenon barely occurs, and the qualified rate of the parts is high.

Description

Technical field [0001] The invention is a manufacturing technology field, which is specifically involved in a cold -drawn forming method. Background technique [0002] The sealing pad is a small part on the engine. The sealing pad has very important uses on the engine and requires a very good sealing properties at high temperature.In existing technologies, the sealing pad manufacturing process is processed by stamping. The mold is designed according to the length and shape of the parts to fix the mold on the punching bed. The startup device will instantly put a lot of pressure on the parts, and the parts are formed in the mold.From the perspective of mechanical analysis, when the parts are stamped, the supporting effects of mold flushing and woven rope support effects.Due to the softening treatment of heat treatment, the plasticity of the parts is improved, and plastic deformation and permanent deformation under the action of pressure. At the same time, the tension of preventing ...

AI Technical Summary

Problems solved by technology

Due to the heat treatment and softening treatment, the plasticity of the parts is improved, and plastic deformation and permanent deformation occur under pressure. scrap parts

After modifying the mold, the size of the interface will be partially oversized after several trial productions

In addition, if the length of the part is very long, when the traditional stamping method is used for processing, the designed mold length is very long and must match the part, which will increase a lot of difficulties in the mold manufacturing process and increase the cost

Therefore, using this process to process sealing gaskets has poor dimensional stability and low consistency, resulting in too many waste products, reduced work efficiency, and increased costs.

Images