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Deep drawing (in Hindi)
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Deep drawing: Blank diameter calculation, Deep drawing force and illustrations for numerical problems.

Ravi Singh Choudhary
Director Sampurn Krishi Utthaan Foundation

U
Unacademy user
Sir...agar kisi ka BE mechanical me 60 percent se Kam h aur wo gate qualified karta h to gate through psu aur maharatna jo bhi companies h use job pa Sakta h ....matlb agar 60 percent se Kam h to gate qualified karke wo psu ke through job pa Sakta h ya ni..
sir ....jaise gate ka form fill up karne ke liye koi percentage criteria ni h kya Aisa hi gate qualified karne ke bad job ke liye bhi h ya job ke liye percentage criteria h ..... please reply sir
  1. Sheet metal Forming BY RAVI SINGH CHOUDHARY


  2. GATE syllabus Load estimation for Sheet metal forming process Shearing: Blanking & Punching Deep drawing Bending


  3. Deep drawing Blank holder is loaded by a blank holder force, which is necessary to prevent wrinkling and control the material flow into die cavity. Punch Blankholder Die D, Db


  4. Deep drawing dh 4 4


  5. Deep drawing d 220r


  6. Deep drawing Hemispherical en 4


  7. Limiting Drawing ratio Thumb rule: 1st reduction = 50% 2nd reduction = 30% 3rd reduction = 25% 4th reduction = 16% %Reduction = (1-2) * 100


  8. A symmetrical cup of circular cross section with 40m diameter and 60m height, with corner radius of 2mm is to be obtained in C20 steel of 0.6mm thickness. Trim allowance = 3mm. Necessary design calculations as follows Solution: d=40,r=2; d 20 D-Vd? + 4dh V402 + 4 * 40 * 60 105.8 D(final) = 105.8 + 6-112mm 40


  9. A symmetrical cup of circular cross section with 40m diameter and 60m height, with corner radius of 2mm is to be obtained in C20 steel of 0.6mm thickness. Trim allowance = 3mm. Necessary design calculations as follows: Solution: D(final) 105.86 112mm 40 But first reduction can be only 50% and second reduction is 30%.


  10. A symmetrical cup of circular cross section with 40m diameter and 60m height, with corner radius of 2mm is to be obtained in C20 steel of 0.6mm thickness. Trim allowance = 3mm. Necessary design calculations as follows: Solution: D(final) 105.86 112mm Empirical formula for drawing force calculation: P = dt0(d -C) ; C-2.5t or 0.7