This download link is referred from the post: JNTUA M.Tech 2nd Sem last 10 year 2010-2020 Previous Question Papers (JNTU Anantapur)
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Code: 9D04204
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M.Tech II Semester Supplementary Examinations August/September 2018
CNC TECHNOLOGY & PROGRAMMING
(CAD/CAM)
(For students admitted in 2013, 2014, 2015 & 2016 only)
Time: 3 hours
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Max. Marks: 60
Answer any FIVE questions
All questions carry equal marks
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- (a) Discuss the importance of CNC machine tools over conventional machine tools and present the results in a tabulated form.
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(b) With schematic diagrams, explain the working principle of CNC machine tools and indicate various elements in CNC machine tools. - (a) Discuss the constructional features of spindle drives with an illustration.
(b) Explain any six functions / characteristics of CNC machine tool slide ways. - (a) Describe the role of Automatic Tool Changers (ATC) in machining centers with schematic diagrams.
(b) Sketch the schematic view of a CNC machine tool with its accessories. - (a) With schematic diagram, explain the construction and working principle of rotary encoder.
(b) Explain the concept of Moire fringe method in displacement measurement of CNC machine table. - (a) Differentiate between sensors and transducers. Highlight any four types of sensors / transducers.
(b) Discuss the working principle and characteristics of electro-magnetic positional transducers. - (a) Explain the APT programming language structure with one example.
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(b) Discuss APT motion commands with examples. - (a) With a block diagram, explain the open-loop and closed-loop control systems.
(b) Discuss standard features of CNC control systems. - (a) Explain the factors influencing while selecting CNC machine tools.
(b) Describe the method of calculating the machine-hour-rate with one example.
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This download link is referred from the post: JNTUA M.Tech 2nd Sem last 10 year 2010-2020 Previous Question Papers (JNTU Anantapur)