Give three points each on advantages and disadvantages of CAM.
[3 marks]Describe in short the types of manufacturing system used in industries.
[4 marks]Explain open-loop control system used in a CNC system with a schematic diagram (include the drawback and application). Draw a block diagram of velocity control loop for a closed-loop control system.
[7 marks]Draw a block diagram for retrieval type CAPP system.
[3 marks]Figure 1 shows a 4-axes horizontal machining center. Designate its axes.
[4 marks]Explain the principle of recirculating ball screw. Make a table of comparison between a conventional screw and a ball screw regarding load carrying capacity, travel speed, positioning, stiffness, friction, efficiency and maintenance.
[7 marks]First write a cut planning and then write a part program to drill a pattern of holes on a 15-mm thick plate as shown in Figure 2. Use subprogrm method. Cutting parameters are: tool number T02, speed 30 m/min, feed 50 mm/min. (Do not draw the given figure)
[7 marks]When could you state that a manufacturing system is ‘flexible’? If there are any tests for checking this, name them.
[3 marks]Brief about functions of computers in FMS. (Any four)
[4 marks]What are the two major functions of tool monitoring systems? Explain various methods adopted for it.
[7 marks]Define PLC. Brief about the relay device components used in it.
[3 marks]State points on role of manufacturing engineers in the CIM environment.
[4 marks]Apply the rank order clustering technique to the PFA chart given in Figure 3.
[7 marks]Define load capacity, degree of freedom, work volume for a robot system.
[3 marks]Write a brief note on position sensors used in robots.
[4 marks]Provide a comprehensive list of robot specifications with regard to (a) manipulator and (b) controller.
[7 marks]Explain the PLC architecture using a diagram.
[3 marks]Enlist benefits of an FMS. State the associated limitations.
[4 marks]What are the different work-space configurations of a robot? Explain any two with neat figures.
[7 marks]What do you understand by bill-of-materials and master production schedule as required in an MRP system?
[3 marks]What is MRP-II? Explain in brief.
[4 marks]Elaborate on JIT production systems. How are these usefully associated with FMS?1
[7 marks]In block number 60 of a part program a linear interpolation is required to a target point (25.40, 12.50, --10.00) with feed rate 200 mm/min and coolant on. Write this block in fixed sequential format, tab sequential format and word address format. (Coordinates are in millimeters)
[3 marks]A 200-step stepper motor is directly connected to a 5-mm pitch ballscrew. Calculate the resolution of the axis. Also calculate number of pulses required to move the axis by a distance of 70.275 mm. What shall be the pulse frequency to the stepper motor in order to achieve a linear velocity of 210 mm/min?
[4 marks]Enumerate types of problems commonly encountered in planning and control of production when traditional PPC is employed. Figure 1 Figure Figure Ma c h1 in e s A1 B1 C1 D1 Pa r E1 t s F1 G1 H1 I1
[2 marks]