Blanking die for sheet part with high-precision axle hole

Abstract

The invention discloses a blanking die for a sheet part with a high-precision axle hole. The blanking die comprises an upper male die body, a discharging plate and a lower female die, wherein the discharging plate is in elastic fit with the upper male die body; the blanking die is mainly characterized in that a compacting plate used for compacting a to-be-machined workpiece is arranged on a working surface of the discharging plate. Under the working conditions of being compacted in a surface-surface manner by the compacting plate and the lower female die and being positioned by a positioning core rod, the to-be-machined workpiece with the axle hole is punched and blanked to be formed. The blanking die has the characteristics that the technical scheme is reasonable, the structure is simple, the precision of the axle hole and the precision of the position of the axle hole are high, the punching and blanking forming precision is high, and the like; the blanking die is particularly applicable to punching forming production of laminated stators of motors.

Description

Technical field [0001] The invention relates to a blanking die for sheet metal parts with high-precision shaft holes (or through holes), in particular to a blanking and punching metal die for sheet metal parts, which belongs to sheet metal forming die technology. Background technique [0002] The shaft holes in the present invention are all through holes on the sheet material that are matched with other workpieces in a precision shaft hole. [0003] The prior art blanking and punching of sheet metal workpieces with shaft holes is usually carried out by a forming blanking die connected with an upper die. Under its working conditions, the processed sheet metal workpieces existing between the discharge plate and the working surface of the lower mold micro-clearance fit are generally in a non-compacted free state, and the processed sheet metal workpieces are formed in the At the moment of blanking die punching, the "stripe structure" of the sheet metal parts suffered during the rollin...

AI Technical Summary

Problems solved by technology

This defect cannot be overcome by the subsequent grinding process, so that there are inconsistencies in the fit gap between the lamination rotor of the motor and the local shaft hole of the lamination stator and the misalignment of the shaft hole, which directly affects the quality of the motor.

[0006] And similar negative effects caused by poor fitting accuracy of the shaft hole and misalignment of the shaft hole also exist in the production of other industrial products.

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