Engineering Machinery Bolt Locking Of The Optimization Research

In the China equipment manufacturing industry, engineering machinery industry has a history of several decades, in the whole development of products has formed covering multiple clusters, with considerable industry leading technology, advanced design concept and rich experience. In recent years, the development momentum of global economic integration is very rapid, due to our country potential huge market appeal, and have a lot of human resources, leading global manufacturing giants have some advanced technology, a large number of industries operating funds as well as some cutting-edge technology products into the China, accelerate its to share the speed of Chinese market, construction machinery enterprises, we have a lot of domestic and foreign shocks of the same industry, competition is becoming more and more serious.The selection of mechanical equipment, bulldozers bulldozers and other engineering Shantui company production as the research object, the engineering machinery and equipment for the functional design, widely used in the port for coal, sand and other goods scattered smooth, clean, pushing under conditions that can push the cargo in the material, but also on the cabin around the cargo rake cleaning work operating environment; open or closed workshop, cabin space, working environment of high temperature (40 DEG to 60 DEG), high humidity, high dust, high corrosion resistance. Operation because of the need to frequently shift and adjust the direction of the machine, so the load in the changing times, and due to the impact of working space, body and cabin frequent collision, so long bolt engineering machinery and equipment loose quality problems continued has not improved, it has great impact on the company's product quality and brand image.The main research contents of this paper include the following three aspects:(1) from the analysis of the force of the screw connection, through the analysis of the force of the nut, the reason of the bolt loose and falling off is studied. Mainly because of the use of the process, by the external shock, threaded connectors have elastic torsional displacement with time and load accumulation reaches a critical value, the displacement torque generated by the critical value is greater than the thread self-locking torque and self-locking performance of threaded connection is broken, causing the connecting piece loose failure.(2) the effect of screw hole self processing precision equipment, cutting parameters, drills, taps, cutting fluid and other factors, the contrast experiment by single variable method, the gauge measuring method to detect the processing thread hole, by comparing the qualified rate of thread hole, confirm the cause of the poor quality of its own processing thread hole is the quality of the equipment and tool rigidity.(3) the research on the bolt and the bolt of the construction machinery and equipment. On the front hood, wing, hanger, crawler board is optimized to improve product structure, enhance the damping performance of the whole structure, increase the impact of the product structure. Enhance the thread processing technology, selection of CNC machining center equipment, and more, and can give full play to the thread machining center technology advantage in the processing of U drilling, screw thread milling cutter and other advanced processing, improve their own quality assurance screw thread hole, anti loosening effect from many aspects.