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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:31203
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。
The depth of cut used was about 28 thousandths per side in the interrupted cut pocket operation and the speed was 120 SFM.
As any random trial in this standard operation involved a possibility of a scrap which could lead to a big loss in production time and part cost, so an old scrap part was taken for a trial study, and 4 trials were planned.
When too many cutting parameters could be changed there is a possibility for the process to go out of control, and so only a set of known cutting parameters were changed to observe the effect on the operation time.
As the process involves a lot of time the following were documented during the turning operation. The number of pass, the time taken for each pass, the number of rerun in each pass to complete the step, the number of inserts used for each pass and then the insert condition after each pass.
In the first trial the material worked was inconel, this material had a lot of trouble in creating work standardization as it was one of the toughest materials to work with. From the initial discussion in this chapter it could be understood that the insert could have been given too much of stress during the operation which is the reason for the failure of 53 inserts during the operation.
So the first step in this process optimization was to reduce the depth of cut and to run the other conventional cutting parameters as the same. The depth of cut was reduced from 28 thousandths to 15 thousandths per side, and the speed was run at 120 SFM with the same tool inset A.
As said the following parameters were observed and documented as follows:
Should have Touched the side drill Holes. Repass has reduced when compared to earlier runs, but still Opportunity for improvement
Noticed the Formation of hump. The Front part was good, the back Portion was rough. Should be the starting stage of a taper
Hump is built up at the back, so more number of finish pass to remove the taper.
4.3.1 Trial 1 Result
At the end of this trial a lot of background information supporting the process was observed, and it paved way for further interesting trials. This trial could be considered partially successful as the trial helped to save 3 hours of running time with the help of the reduced depth of cut. The main intention in this trial was to reduce the stress given to the tool inserts. From the table above it could be noted that there was consistency in the beginning of the trials and later as it reached the interrupted cut the real problem started and where the change didn't help much. After some analysis, the reasons for the inserts performance in the beginning and some poor performance later was understood, as this was due to some block of material for the tool insert to work before it could touch the side drilled holes where the actual interrupted cut process starts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。