1. A cylindrical cup, 100 mm diameter and 85 mm deep is to be drawn from...

 

  

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1. A cylindrical cup, 100 mm diameter and 85 mm deep is to be drawn from a steel sheet of deep drawing quality, 1 mm thick. Determine the blank diameter and the other drawing variables for the dies of all draws. Also, estimate the drawing load if the tensile strength is 415 MPa. 2. Calculate the developed lengths for the components shown below. Calculate the bending load in each case after deciding on the type of die to be used. All dimensions are in mm. Material is 1020 CRS. -50 10 Ø6 20 10 20 -12.5 1.5 -R3 12.5 Ø6 -45- -30 10 -75 25 R6 3. A 60 deg bend is required on a sheet metal component. Should the die angle be equal to, more, or less than 60 deg? Give reasons in support of your answer. 4. How does the side wall thickness of a drawn component vary? Explain the causes with a sketch. 5. Explain what happens when the clearance between the punch and the draw die in the case of the deep drawing operation, is equal to the thickness of the blank. 6. Where are the following used? Explain the reasons for the same. a) Rigid blank holder b) Spring loaded blank holder 1. A cylindrical cup, 100 mm diameter and 85 mm deep is to be drawn from a steel sheet of deep drawing quality, 1 mm thick. Determine the blank diameter and the other drawing variables for the dies of all draws. Also, estimate the drawing load if the tensile strength is 415 MPa. 2. Calculate the developed lengths for the components shown below. Calculate the bending load in each case after deciding on the type of die to be used. All dimensions are in mm. Material is 1020 CRS. -50 10 Ø6 20 10 20 -12.5 1.5 -R3 12.5 Ø6 -45- -30 10 -75 25 R6 3. A 60 deg bend is required on a sheet metal component. Should the die angle be equal to, more, or less than 60 deg? Give reasons in support of your answer. 4. How does the side wall thickness of a drawn component vary? Explain the causes with a sketch. 5. Explain what happens when the clearance between the punch and the draw die in the case of the deep drawing operation, is equal to the thickness of the blank. 6. Where are the following used? Explain the reasons for the same. a) Rigid blank holder b) Spring loaded blank holder