Research And Optimization Of Stamping Process Of Oil Separator Tube

The oil separator tube is a functional component installed between the outlet of the air conditioning compressor and the inlet of the condenser tube in new energy vehicles,used to separate lubricating oil mixed in high-pressure steam.In order to ensure the separation efficiency of the oil separator tube,its shape is designed as a cylinder,with structures such as large arms,small arms,cones,and arcs.The shape is complex and requires high precision,which brings difficulties to the processing and manufacturing of parts.Due to the relatively short development time of new energy vehicles in China,the manufacturing process experience of oil separator tubes is insufficient,and the failure rate is high,making it impossible to carry out mass production with stable quality and heavily relying on imports.Improving the forming quality and efficiency of oil separator tubes,breaking foreign monopolies,and improving the development quality and sales volume of new energy vehicles in China have become urgent issues that need to be addressed.This article takes the oil separator tube used in the air conditioning compressor of a new energy vehicle as the research object,designs a stamping forming process,and studies the influence of process parameters through simulation and experiment.It provides technical guidance for shortening the product development cycle,reducing development costs,and improving quality.The specific research content is as follows:(1)To address the issues of unstable workpiece positioning and poor sheet metal fluidity during the stamping process,an inclined edge structure was added to the concave die,and simulation software was used to study the material fluidity at different angles of the inclined edge of the concave die.Taking the thinning rate of the sheet metal after stamping as the evaluation standard,it is concluded that the material flowability is the best when the angle between the inclined edge of the die and the vertical direction is 15°～20°.(2)Through orthogonal experiments and die stamping experiments,the influence of process parameters such as blank holding force,concave die fillet radius,stretching coefficient,and friction force on the deep drawing quality of oil separator tubes is studied.And based on the minimum wall thickness of the workpiece after stamping and whether the workpiece is cracked as the evaluation criteria,the optimal process parameter combination was selected.(3)By means of mold compensation and modification of friction coefficient,and based on the technical requirements of the oil separator tube as the evaluation standard,the rebound of the shaping process is controlled to reduce the impact of rebound on the forming quality of the oil separator tube.(4)In response to the phenomenon of workpiece deformation,a retractable punch structure is designed with the slider and spring as the core,to counteract the impact of material return force on the workpiece.(5)Based on theoretical analysis,the mold was manufactured,debugged,and qualified products were produced,verifying the effectiveness of the process parameters of the oil separator tube;Batch production can be achieved through a small amount of debugging,demonstrating the feasibility of reducing the development cycle of molds through finite element simulation technology.