GATE ME 2024 Set 1 — Question 62
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Manufacturing Processes → Forming → Sheet Metal Operations
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Question
A blanking operation is performed on C20 steel sheet to obtain a circular disc having a diameter of mm and a thickness of mm. An allowance of is provided. The punch size used for the operation is ___________ mm (rounded off to decimal places).
Correct answer
19.84 to 19.84
Solution
In a blanking operation, the size of the die is made equal to the size of the blank (the circular disc), and the clearance is provided on the punch. Given:
- Blank diameter () = mm
- Sheet thickness () = mm
- Allowance () =
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