连杆应力槽双向同步电火花线切割机床设计

Two-way synchronous wire EDM machine for stress groove of connecting rod

针对连杆应力槽的加工效率、设备制造成本、两侧应力槽一致性、恒切深等问题,在单杆切槽机床的基础上,提出了一种双向同步电火花线切割加工应力槽设备。设计了支撑平台、切槽平台、对中平台、适配平台等机械结构,研制了基于STM32F103单片机的专用脉冲电源,开发了基于三菱PLC的控制系统;采用了双向同步切割的加工模式,研究了各因素对切槽宽度的影响;采用了优选参数,研究了样机与单杆切槽机床的加工效率。研究结果表明:电流因素对切槽宽度影响最大,样机能实现对连杆应力槽更高效率的双向同步切割,保证了良好的切槽质量与较低的设备制造成本。

Aiming at the processing efficiency of connecting rod stress groove,equipment manufacturing cost,consistency of stress groove on both sides,constant depth of stress groove,based on the single-rod grooving machine,a two-way synchronous wire electrical discharge machining equipment for stress groove was proposed.The mechanical structure of support platform,grooving platform,alignment platform and adapter platform were designed.A special pulse power supply based on STM32 F103 single-chip microcomputer and a control system based on Mitsubishi PLC were developed.The processing mode of two-way synchronous grooving was adopted to study the influence of various factors on the width of the groove.Furthermore,the optimized parameters were used to compare the machining efficiency between the prototype and the single-rod grooving machine.The results indicate that the current factor has the greatest influence on the groove width.The prototype can achieve higher efficiency by two-way synchronous grooving stress groove,and ensure good grooving quality and low equipment manufacturing cost.