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论文作者:www.51lunwen.org论文属性:本科毕业论文 Thesis登出时间:2015-06-03编辑:felicia点击率:30430
论文字数:15571论文编号:org201505262313039095语种:英语 English地区:英国价格:免费论文
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摘要:对于一个企业而言,工作中掌握良好的工作方法可以有效提高工作效率和工作质量,推动企业的发展。这篇文章就围绕工作方法进行具体阐述。
4.7.1 Results
At the end of this final trial it is fully convinced that the process is made under control and some of the important learning's were the increased speed helped to shape the process to avoid rerun, this study was helpful for the operators to reduce time in their operation as they are used to reduce the speed in case of any humps. The conventional way of doing it is the speed is being reduced by 20% to remove the taper. The increased number of insert checks in the process helped to make the process more stabilize. The work once completed was perfect with the new insert check action and there was no reason for turning the part at the same depth of cut. With the comparison of the old and new process we can understand that the old process took 55 reruns to shape the part i.e. 55 times it is run on the same depth of cut, but in the new process it took 10 reruns to complete the pocket. The 10 reruns were made on the finishing stage to remove the humps formed due to the back squaring. The total time taken by the old process is about 45 hours just to complete the pocket. The new process took 20 hours to complete it.
4.8 Lessons Learned
In the case of humps and taper increasing the speed would help rather than slowing down. This is because if the speed is reduced we are just pushing the material or rubbing the material, we are not cutting it. A lot of re pass would lead to work hardening, and eventually it becomes much tougher to cut.
Insert wear should be carefully taken into account. If the inserts wear faster it would lead to taper formation, this would lead to a large number of reruns in the final stage. So the wear of the insert should be studied in each pass to have an idea about the stress pattern in the insert. This one improvement in turning operation helped to save almost 2 full working days in non value added time.
4.9 Sustaining Improvement
As in the past a number of improvements were made which were typically successful in the beginning and later lost its control in the long run. As the new process gained attention among the workers a standardized CNC program for different part sizes and materials types were made. The old programs were removed phase by phase new programs with the proven changes were implemented. Earlier each operator had their own customized programs and methods which led to increased run time. Now a more common program is being used by all the operators.
4.9.1 Routing Updates
As said, the entire 3rd operation in this machine is divided into 13 sub operations and the clockin本论文由英语论文网提供整理,提供论文代写,英语论文代写,代写论文,代写英语论文,代写留学生论文,代写英文论文,留学生论文代写相关核心关键词搜索。