Edge cutting device and edge cutting method for thin-wall deep-drawn cylindrical part

Abstract

The invention relates to the field of die manufacturing of cylindrical parts, in particular to an edge cutting device and an edge cutting method for a thin-wall deep-drawn cylindrical part. The edge cutting device for the thin-wall deep-drawn cylindrical part comprises an upper die holder and a lower die holder. A cylindrical part edge cutting mechanism is arranged between the upper die holder andthe lower die holder. The cylindrical part edge cutting mechanism comprises a female die, a fixed core male die, a buffer spring, a blanking connecting sleeve and a cylindrical cutter. A beveling supporting face is formed at the upper end of an inner hole of the female die, and the blanking connecting sleeve is arranged on the outer side of the fixed core male die. The upper end of the blanking connecting sleeve is connected with the upper die base through the buffer spring, the lower end of the blanking connecting sleeve is connected with the cylindrical cutter, and the distance between theblade of the cylindrical cutter and the axis of the blanking connecting sleeve is not smaller than the half of the width of the inner hole of the female die. According to the edge cutting method for the thin-wall deep-drawn cylindrical part, the cylindrical part is placed in the female die, the fixed-core male die and the blanking connecting sleeve move downwards, and the cylindrical cutter cuts off peripheral excess materials. The cost is low, the cylindrical part is free of burrs after edge cutting, the efficiency is high, and the device and the method can be combined with a preceding stamping procedure for progressive die in-series connection.

Description

technical field [0001] The invention relates to the field of mold making for cylindrical parts, in particular to an edge trimming device and method for thin-wall deep drawing cylindrical parts. Background technique [0002] The deep drawing process is a common processing method that uses a mold to press a flat blank into a variety of open hollow workpieces. It is widely used in industries such as automobiles, electronics, and electrical appliances. The amount, that is, the circumferential residual material, is cut off after the drawing is completed. The commonly used trimming process is mainly mechanical processing or rotary cutting method, but this method is used to remove thin-walled deep-drawing cylindrical parts. When trimming the margin, it is easy to cause processing deformation and high cost. In addition, the oblique slider mechanism is generally used in the stamping die to convert the vertical motion of the die into a horizontal and linear motion, thereby realizing t...

AI Technical Summary

Problems solved by technology

[0002] The deep drawing process is a common processing method that uses a mold to press a flat blank into a variety of open hollow workpieces. It is widely used in industries such as automobiles, electronics, and electrical appliances. The amount, that is, the circumferential residual material, is cut off after the drawing is completed. The commonly used trimming process is mainly mechanical processing or rotary cutting method, but this method is used to remove thin-walled deep-drawing cylindrical parts. When trimming the margin, it is easy to cause processing deformation and high cost. In addition, the oblique slider mechanism is generally used in the stamping die to convert the vertical motion of the die into a horizontal and linear motion, thereby realizing the circular movement of the cylindrical part. The removal of surplus material, but, this method not only device structure is complicated, and trimming quality is relatively poor, and Chinese patent CN103949527B discloses trimming device and method that cylindrical workpiece is used, and the trimming device that cylindrical workpiece is used comprises die, Punch, cam, cam driving mechanism, die eccentric reset mechanism and follow-up mechanism, the die is set above the punch, the axial section of the die is H-shaped, the upper space of the die is equipped with a cam, the The inner wall is provided with a cam stop groove, the cam is connected with the cam driving mechanism, and the lower space of the die is provided with a binder plate; the outer wall of the die is provided with an eccentric reset mechanism of the die; the follow-up mechanism includes a follow-up support sleeve , the movable positioning pin and the positioning screw of the support sleeve, the follow-up support sleeve is connected with the punch through the movable positioning pin, the bottom of the movable positioning pin is also equipped with a floating spring, the middle part of the follow-up support sleeve is provided with the positioning screw of the support sleeve, and the top of the follow-up support sleeve The top of the concave die is provided with a rubber spring for buffering, the bottom of the punch is connected to the lower formwork through the punch fixing plate and the backing plate, and the punch fixing plate, the backing plate and the lower formwork are connected by locking bolts Connect in sequence; the outer periphery of the punch is provided with a limit mechanism, the limit mechanism includes an elastic discharge plate, an upper limit block and a lower limit block, and the upper and lower sides of the elastic discharge plate are respectively provided with an upper limit block and a lower limit block, and the elastic discharge plate Set on the outer periphery of the punch, the upper limit block is fixed on the bottom of the die, and the lower limit block is fixed on the punch fixing plate. The essential shortcomings of the above patents are: first, the above patent drives the die to perform annular horizontal eccentric movement through the cam drive mechanism, Furthermore, it drives the supporting sleeve and the cylindrical workpiece to perform annular horizontal eccentric movement, so that the punch performs circular edge trimming on the cylindrical workpiece. This operation process is relatively complicated, and the edge trimming process still belongs to the category of local rotary cutting. Compared with stamping forming, it is lower; second, the structure of the above-mentioned patent is complicated, there are many parts, and the cost of use is high; third, the above-mentioned patent cannot be connected with the progressive die in the previous stamping process, which leads to the need to change the site and mold for cutting after deep drawing Circumferential residual material operation, low efficiency, limited space

Images