...EXECUTIVE SUMMARY: I propose that our firm should buy 1 CNC grinding machine in order to improve performance of the existing line because face grinding is our bottle neck Which is increasing the MLT of the process. By buying CNC, we can reduce the number of products going to rework and failing the inspection process as seen by the analysis given below. We should employ this strategy immediately because we have only 6 months and the machine needs at least 6 months to work at full capacity. We should not accept orders below 70 as it increases MLT and disturbs our process. We should increase or batch size to 140 to increase output. KEY ISSUES: Problems the plant is facing is that lot of time is spent on customer complaints and managing the growing amount of rework for products that failed the design specifications hence further increasing the MLT of the process. There is lot of rework and process is slow because customers generally prefer to receive complete orders. The plant is getting orders ranging from 1 to 140 units. Small order are increasing the MLT because of high setup time. For the small orders less than 70, the bottle neck is Milling in the chamber machining operations but for orders greater than 70 the bottle neck is face grinding as shown in exhibit 1. Chamber machining and grinding problems could not be detected until the sensor is built and tested. So we have to go through the whole process. The grinding process is our bottle neck which is reducing...
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...Milling: I used the milling machine to mill shards of metal off so I could create the smooth and sleek finish I wanted on my work; It was also very easy for me to shape my work in the desired style. It also allowed me to mill down top a specific height that I wanted. Pillar drill: I used the pillar drill to drill holes into my work, these holes were made so I could put a tap into them are create a threaded hole for my bar which I will then use in my tool makers clamp Tapping: as I mentioned before I drilled a hole with a pillar drill and made it possible to tap. I held my work in a bench vice to do this process, this now has allowed me to be able to insert threaded bar into my clamp. 3 jaw chuck: I used a 3 jaw chick when using a lathe, this allowed me to grip my work efficiently and allowed me to be safe using that machine at over 540rpm due too it’s very efficient holding style Angle plate: I used an angle plate to ensure correct measurements on my clamp, an angle plate is level and the best surface to scribe on. Bench vice: I used a bench vice thought the whole process of creating my tool makers clamp, this made it very easy for me to undertake lots of procedures that would often be hard to carry out without the use of a bench...
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...Boring is an operation used for increasing a hole which has been already made by other processes such as drilling or casting. Thus, it serves the purpose of increasing the internal diameter of cylindrical objects. It is done by means of a single-point cutting tool called boring bar. The boring operation can be done by either rotating the boring bar with the workpiece held stationary or otherwise keeping the boring bar positioned on the tool post of turning machine and moving it towards rotating workpiece which is held by a chuck. Boring is used to achieve different aspects for a workpiece .Firstly, it helps to give appropriate size and finish for the workpiece. Boring can be used to straighten a hole which was originally drilled,...
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...Northboro Machine Tools Corporation - Outline Wiley Belknap, Eric Huntermark, Zachary Jumba, Alexander Spoont, David Okwaisie 1) Background a) Founded in 1923 by two mechanical engineers (James North and David Peterboro), made take and armored vehicle parts during WW2 b) How do they make Money? i) By 1975, they “had developed a reputation as an innovative producer of industrial machinery and machine tools” which were sold mostly to local/regional firms ii) Incorporated CAD/CAM into production process which allowed machine presses to manufacture metal parts by responding to computer demands iii) By 1991, CAD/CAM accounted for 45% of sales, presses and molds = 40%, 2) Competition and Outside Pressure iv) CAD/CAM Industry (1) Faced a number of large competitors (GE, HP, Digital Equipment) (2) Aggressive Entry of Foreign Firms/Dollar rising 3) Northboro’s Response To declining revenues c) Devote a larger portion of R&D budget to CAD/CAM d) Corporate Restructuring #1 v) 1989 – sold two unprofitable lines of business, two plants, five leased facilities, and reduced personnel vi) Costs = 44 million e) Corporate Restructuring # 2 vii) Altered manufacturing Strategy, refocused sales and marketing, new procedures to further reduce staff and facilities viii) Cost = 60 million f) Total Restructuring in 1989/91 = 135...
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