Download GTU BE/B.Tech 2019 Summer 7th Sem New 21720022172010 Automated Manufacturing I Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION — SUMMER 2019

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Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q1

1. (a) Give the types of AS/RS. [03]
2. (b) Explain basic component of automated storage/retrieval system. [04]

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3. (c) Write a part program using G75 for grooving in X axis as shown in fig. 1. [07]

OR

Q2

1. (a) Explain Parametric Subroutine. [03]

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2. (b) Give advantages of CNC over NC. [04]
3. (c) Write a part program for producing four tapped holes as per the drawing shown in fig-2: [07]

OR

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Write a part program for producing a central groove as shown in fig.3

Q.3

1. (a) Explain floating zero. [03]
2. (b) Define: Accuracy, Precision, and Resolution. [04]

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3. (c) Explain following: [07]
   1. (i) Automatic tool changer (ATC) in CNC machine,
   2. (ii) Automatic pallet changer (APC) in CNC machine.

OR

Q.3

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1. (a) Define automation. [03]
2. (b) Explain in briefly Drilling G81 in milling machine. [04]
3. (c) What is the difference between hard products variety and soft product variety? [07]

Q4

1. (a) What is AGV? [03]

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2. (b) Explain in briefly Boring Cycles G90 in milling machine. [04]
3. (c) With neat sketch explain the four basic steps of rapid prototype techniques. Describe the Stereo lithography (SLA) technology. [07]

OR

Q.4

1. (a) What is process planning? [03]

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2. (b) Explain the functions of the following G codes. G21, G76 and G92. [04]
3. (c) Explain the principle of CMM. Describe the methods of operating and controlling a CMM. [07]

Q.5

1. (a) Explain Machine Origin in context of Turning Centre. [03]
2. (b) Compare the roller screws over ball screws. [04]

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3. (c) What is an automation migration strategy? Explain three phase of a typical automation migration strategy. [07]

OR

Q.5

1. (a) Explain Program Origin in context of Turning Centre. [03]
2. (b) Explain the difference between the following cycles with respect to the spindle rotation and tool movements. (i) G74 and G84. [04]

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3. (c) Using neat sketches, explain the working principle of incremental and absolute optical encoders. [07]

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