Research On Improvement Of Motorcycle Brake Jitter Based On Six Sigma Method

With the innovation and improvement of technology,the domestic motorcycle market tends to be mature,and users’ requirements for the safety and comfort of motorcycle driving are higher and higher.Users are not only concerned about fuel consumption,engine power and appearance,but also the problems of noise,jitter and harshness of brake system.brake jitter is the vibration of brake handle and frame body caused by braking at a certain speed,which directly affects the driver’s comfort and accelerates the fatigue and aging of parts,which may cause driving safety.Therefore,in order to improve the comfort and safety of driving and improve customers’ satisfaction,the motorcycle manufacturers actively respond to the brake jitter problems.In the paper,we combined with Six Sigma Management Method,statistical tools and engineering capacity analysis chart,from the definition,measurement,analysis,improvement and control of five stages to promote.The economic and reasonable improvement scheme was put forward and implemented,which improves the process guarantee ability and solves the practical engineering problems of the enterprise.This paper studies the vibration problem of the brake process which fed back by the company’s K series motorcycle in the market,analyzes and confirms the runout,roughness,roundness and related component dimensions of the wheel hub and hub brake.Based on the fault reproduction test,it is confirmed that the cause of the vibration is the roundness of the wheel hub brake ring.In the measurement stage,the vibration model is analyzed and the main cause of vibration is found.The Cause and Effect Diagram Analysis Method was used to analyze he possible terminal factors in analysis phase.Based on the idea of process capability analysis,through the use of mathematical statistics,with the help of engineering capacity calculation table tool,it is found that the engineering capacity of roundness is not enough to cause dimensional fluctuation.In improvement stage,aiming at the problem of roundness out of tolerance of front wheel hub’ s brake ring,the improvement scheme of encircling clamping and one-time clamping processing is proposed to avoid the plastic deformation and clamping error of parts,improve the engineering guarantee ability of parts,and make the roundness of wheel hub meet the drawing requirements,and the process is controlled.In addition,through the change of fixture mode,the uneven force is solved,and the stability and efficiency of clamping are improved.Combined with the lack of process control items of the manufacturer,the quality control was improved in control phase,and the relevant inspection links were added after the wheel drum processing to prevent the outflow of defective products.Finally,after improving the roundness,the result of the road test and batch tracking are qualified.After the improved drum mass production was put into the market for half a year,there was no feedback on the market,which verified the effectiveness of the scheme.Through the research of drum brake jitter,the experience of using Six Sigma Management Method to improve the process is accumulated,and the tool design method of one-time clamping processing of concentric holes on both sides is summarized,which provides an effective corresponding scheme for similar structures.In addition,the Six Sigma Management Method has strong applicability,and the quality problem improvement control can be referred to and used flexibly.