The issue of rejection is paramount in any organization, especially in manufacturing. Therefore we intend to aid in quality improvement by reducing rejections in processes where there is less yield.
Likewise we had a problem of high rejections in plunger vane grinding process. Grinding is done on flat surface of plunger vane where it was getting rejected for thickness variations. Our objective is to improve the quality by solving this issue.
We used twelve step methodology for solving this problem. Our team analyzed the problem to find all the possible causes which were developed and mapped in Ishikawa diagram and these are validated for significant and non-significant. We found three significant causes which were improper dressing, manual correction after dressing and muck formation on wheel surface. We used why-why analysis to find root causes which were dresser unit Offset for improper dressing, dressing compensation not available for manual correction after dressing and wheel cleaning jet not available for muck formation on wheel surface.
We have developed solution through brain storming and accordingly we have taken actions such as centralizing the dressing point, optimizing the dressing program and introducing cleaning jet for grinding wheel. The team also identified foreseeing probable resistance and solved them. The trial implementation and validation process done methodically. Regular implementation and validation is carried out for all the actions.
After completion of our project, plunger vane thickness rejection is reduced significantly. The team got intangible benefits like self-confidence, recognition, team spirit, sharing knowledge, analytical skill, creativity, motivation and success.
We concluded that nothing is so perfect in this world which cannot be improved further. With this spirit we are working on our next project.
Team Introduction: Our team Sir. M Visvesvaraya is representing the organization Bosch Ltd. Bangalore, India plant.
Bosch is a multinational company headquartered in Germany. It is World’s largest supplier of automotive components.