ME 381 HW 8

Please typing answer only  IENG 302 - Manufacturing Processes: We are reducing the diameter of a 95.8 mm cylinder to 30.04 mm using 7 roughing passes and 3 finishing passes. The finishing operations use a depth of cut of 1.51 mm. The roughing operations are performed with a feed rate of 9.61 mm/s and the finishing operation is performed with a feed rate of 11.31 mm/s. a) What is the depth of cut for a roughing pass? b) What is the rate of material removal (mm^3/s) for the third roughing pass? c) What is the rate of material removal (mm^3/s) for the final finishing pass? d) What is the average rate of material removal (mm^3/s) for the roughing operations?

4) Tool Life: A HSS tool has been used for a metal cutting operation shows a Taylor relationship of VT0.125-44.5. Originally 15 minutes were required to remove a dull tool. A new tool holder has made it possible to reduce the time to 5 minutes. What increase in cutting speed does this permit to obtain the maximum rate of production from the operation?

A product has a market estimate of 98,000 components and requires three processing steps (turning, milling, and drilling), having defective estimates of d₁ = 0.05, d₂ = 0.01, and da 0.03. The market estimate is the output required from step 3. What is the 1 number of units that need to be produced at processing step 1 (turning) in order to produce 98,000 units? 107.423 105,219 106,327 106,304 D

Sub: Advanced Manufacturing Process

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operation, the shear IS cIose to, In turning operation, spindle speed is set to provide a cutting speed of 2.2 m/: The feed and depth of cut are 0.32 mm and 2.1 mm, respectively. The tool rake angle is 15°. After the cut, the deformed chip thickness is measured to be 0.43 mm. Using the Orthogonal model as an approximation of turning operation, the shear strain is close to, In turning operation, spindle speed is set to provide a cutting speed of 2.4 m/

Standard time & work sampling   The following data resulted from a time study made on a horizontal milling machine: Mean manual effort time per cycle: 4.62 min Mean cutting time (power feed): 3.74 min Mean performance rating: 115 percent Machine allowance (power feed): 10 percent Fatigue allowance: 15 percent   questions: 1.) What is the Basic Time for the manual effort?  2.) What is the Standard Time for the manual effort?  3.) What is the Standard Time for the machine?

The following data were obtained in a study taken on a horizontal milling machine:Parts produced per cycle: 8.Average measured cycle time: 8.36 minutes. Average measured stress time per cycle: 4.62 minutes. Average fast traverse time: 0.08 minutes. Average cutting time with electrical power: 3.66 minutes. Performance rating: 115%. Clearance (machine time): 10%. Slack (effort time): 15%. The operator works on the task 8 hours a day and produces 380 parts. How many standard hours does the operator work? What is the operator's efficiency for the 8-hour day?

Expert Q&A Done The top surface of a rectangular workpart is machined using a peripheral milling operation. The workpart is 735 mm long by 50 mm wide by 95 mm thick. The milling cutter, which is 60 mm in diameter and has five teeth, overhangs the width of the part equally on both sides. Cutting speed = 80 m/min, chip load = 0.30 mm/tooth, and depth of cut = 7.5 mm. (a) Determine the time required to make one pass across the surface, given that the setup and machine settings provide an approach distance of 5 mm before actual cutting begins and an overtravel distance of 25 mm after 1.2 9. 20 65 73 actual cutting has finished v in seconds. (b) What is the maximum material 3.9 239 removal rate during the cut v in mm3/sec? 0.127 5

Milling is the process of machining using rotary cutters to remove material by advancing a cutter into a workpiece. This may be done by varying direction on one or several axes, cutter head speed, and pressure. Milling covers a wide variety of different operations and machines, on scales from small individual parts to large, heavy-duty gang milling operations. It is one of the most commonly used processes for machining custom parts to precise tolerances. A torque of 500 N-m is developed in the cutter under steady-state cutting conditions. One of the 16 teeth on the cutter breaks during the cutting operation. Determine the cross-section of the arbor to limit the amplitude of angular displacement of the cutter to 1°. Assume that the arbor can be modeled as a hollow steel shaft fixed at both ends. Data: Length of arbor = 0.5 m, mass moment of inertia of the cutter = 0.1 N-m², speed of cutter = 1000 rpm.

Solve the question below- except that availability = 95%. In a sequential batch machining operation, setup time is 1.5 hours, and the batch size is 120 units. The cycle time consists of part handling time of 30 sec and processing time of 2.85 min. One part is produced each cycle. Tool changes must be performed every 10 parts, and this takes 2.0 min. Determine the average production rate. O O

Only ítem B)  a) select the diameter of the cylinder to be used from L=150mm, if it is required to apply a force of 350 kg for a pneumatic die-cutting press. use the SMC analytical mathematical calculation method, clearly indicating the considerations and criteria used in the calculation. P=80psi   b) The press will be activated 6 times per minute, neglecting the consumption of the hoses, determine the air consumption per minute required by the system.   c)Make the pneumatic diagram for the operation of said press, the application will be with pneumatics pure and as it has no guard it is required that the press be activated using 2 hands safely Explain how it works and describe its components.