The machine preferred for producing 100 pieces
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- 2.) On a lathe, a cylindrical work piece of 100mm diameter is being turned. The RPM is 100. The lenght of the work piece is 200mm. The feed is 0.2 mm/rev. Ignoring approach and overtravel, the machining time for one pass will be nearest to (min).A control block costs $.75 per part to mill without a fixture and $.43 per part when a fixture is used. Assuming the cost of the fixture is $175.00, how much will the fixture save over a production run of 2200 parts?A workpiece of 2000 mm length and 300 mm width was machined by a planning operation with the feed set at 0.3 mm/stroke. If the machine tool executes 10 double strokes/min, What is the planning time for a single pass?
- to perform a rough cut single point facing operation in a lathe of 5 mm diameter cylinder workpiece made of bronce . Feed rate is 0.5 mm/rev , depth of cut of 4.5mm, and Specific Energy of 3 W-s/mm^3. What is the Material Removal Rate in mm^3/s?For the operation of straight turning in a lathe machine, the diameter of the workpiece is 80 mm, the length is 0.12 m, the cutting speed is 80 m / min, the feed is 0.5 mm / rev and the depth of cut is 0.002 m . Find the material removing rate and the time of machining.ME 408 - Machine Shop Theory and Practice How do you center a workpiece in a lathe machine with a four-jaw independent chuck?
- quick and right answer will get an upvote A total of 6000 product must be produced in next 3 days on a CNC machine. The cycle time is40 sec and the setup time for the job is 2 hrs. Calculate the starting number of units if thescrape rate is 5%. Also find the number of machines required to produce this quantity if theplant operate 7 hours a day and 5 days a week.?In a turning operation, the operator has established that a single pass on the cylindrical workpiece must be completed in 5.0 min. The piece is 400 mm long and 150 mm in diameter. Using a feed of 0.30 mm / rev and a depth of cut of 4.0 mm, what speed of cut should be used to meet this machining time?8 A job has to be machined in shaping and the process parameters are given below: a. Length of the job=120 mm b. Speed of the motor=640 rpm c. Cutting speed=264 m/min d. Tool allowance before cutting =30 mm e. Tool allowance after cutting=15mm Determine the cutting to return stroke ratio for the above operation and draw the arrangement of machining with tool head and allowances.
- For a particular process, suppose the bottle neck cycle time is 40, and the raw processing time is 100. What is the minimum number of customers that must be in the system in order for the lead-time (LT) to exceed the raw processing time? Round to one decimal place.(USCS units) A turning operation is performed using a rake angle of 15°. Cutting speed = 200 ft/min, feed= 0.012 in/rev, and depth of cut = 0.100 in. The chip thickness ratio measured after the cut = 0.48. Determine (a) chip thickness after the cut, (b) shear angle, (c) friction angle, (d) coefficient of friction, and (e) shear strain (USCS units) The turning operation in the previous problem involves a work material whose shear strength = 52,000 lb/in2. Based on your answers to the previous problem, compute (a) shear force, (b) cutting force, (c) thrust force, and (d) friction force.Your manager has asked you to submit a report based on lead screws and screw jacks on plant premises. You need to include following calculations for the report. 1. The lead screw of a lathe has Acme threads of 50 mm outside diameter and 8 mm pitch. The screw must exert an axial pressure of 2500 N in order to drive the tool carriage. The thrust is carried on a collar 110 mm outside diameter and 55 mm inside diameter and the lead screw rotates at 30 r.p.m. Determine (a) the power required to drive the screw; and (b) the efficiency of the lead screw. Assume a coefficient of friction of 0.15 for the screw and 0.12 for the collar. 2. The lead screw of a lathe has Acme threads of 60 mm outside diameter and 8 mm pitch. It supplies drive to a tool carriage which needs an axial force of 2150 N. A collar bearing with inner and outer radius as 30 mm and 60 mm respectively is provided. The coefficient of friction for the screw threads is 0.12 and for the collar it is 0.10. Find the torque…