Plunger hole rounding process for automobile engine

Abstract

The invention relates to a plunger hole rounding process for an automobile engine, and belongs to the field of machining. The plunger hole rounding process includes the following steps that S1, punching is carried out, a punching die is provided and comprises a female punching die body and a male punching die body, a plunger blank to be machined is placed on the female punching die body, stamping equipment is started to punch the blank so as to form a to-be-rounded hole identical with the male punching die body in cross-sectional shape, and then the male punching die body is quickly reset along with an upper workbench; S2, the hole opening is rounded, a hole opening rounding male die is provided, and the edge of the hole opening of the to-be-rounded hole is forcedly extruded to form an R-angle through the smooth-transition arc-shaped outer wall of the hole opening rounding male die; and S3, thermal treatment is carried out. The process has the characteristics that efficiency is high, the quality of machined products is stable, and the cost is low.

Description

technical field [0001] The invention relates to a processing technology for automobile plunger parts, in particular to a technology for rounding corners of plunger holes for automobile engines, which belongs to the field of mechanical processing. Background technique [0002] The automobile plunger is an airtight part in the "hydraulic pump" of automobile engine parts. The difficulty in processing this product lies in the arc surface of R shown in the figure. The roundness of the arc surface must reach 0.001 mm. [0003] The existing processing process is generally: drilling - boring - heat treatment - CNC lathe turning R surface. The equipment involved in the process of the above-mentioned existing processing scheme includes drilling machine, boring machine, CNC lathe, milling machine, etc. Different processes need to be transferred to different equipment for processing, materials need to be transferred, and the processing cycle is longer, which directly increases the proce...

AI Technical Summary

Problems solved by technology

The equipment involved in the process of the above-mentioned existing processing scheme includes drilling machine, boring machine, CNC lathe, milling machine, etc. Different processes need to be transferred to different equipment for processing, materials need to be transferred, and the processing cycle is longer, which directly increases the processing cost of the product

Moreover, during the transfer process of materials, it is easy to cause processing problems such as mixing materials and missing sequences, causing quality risks and hidden costs for later products

[0004] The time required for turning the R surface of the CNC lathe is too long, and the accuracy is unstable. In the later stage, unqualified products need to be manually sorted out, which increases the processing cycle again and thus increases the cost.

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