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Asked: 2020-04-02T04:05:38+05:30 In:

GATE MT 2015 Q27. Which of the following metal working operations can be categorised as an indirect compression process?

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12.33%(A) Forging ( 9 voters )
42.47%(B) Wire drawing ( 31 voters )
39.73%(C) Extrusion ( 29 voters )
5.48%(D) Stretch forming ( 4 voters )
Based On 73 Votes

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GATE MT 2015 Q27. Which of the following metal working operations can be categorised as an indirect compression process?
GATE MT 2015 Question paper with solutionGATE MT Manufacturing technologyGATE MT Previous Year Questions With Solutionindirect compression process
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      Correct answer is option C. Extrusion is a process used to create objects of a fixed cross-sectional  profile. A material is pushed through a die of the desired cross-section. The process encounters indirect compressive and shear forces. The process begins by heating the stock material (for hot or wRead more

      Correct answer is option C.

      Extrusion is a process used to create objects of a fixed cross-sectional  profile. A material is pushed through a die of the desired cross-section. The process encounters indirect compressive and shear forces.

      The process begins by heating the stock material (for hot or warm extrusion). It is then loaded into the container in the press. A dummy block is placed behind it where the ram then presses on the material to push it out of the die. Afterwards the extrusion is stretched in order to straighten it. If better properties are required then it may be heat treated or cold worked

      The extrusion ratio is defined as the starting cross-sectional area divided by the cross-sectional area of the final extrusion. One of the main advantages of the extrusion process is that this ratio can be very large while still producing quality parts.

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