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MTM0070 Materials engineering
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What elements of bending punch have the highest impact on the bending force?
In which case the springback is bigger?
What are the main sheet forming separation processes?
The disadvantage of sheet forming is
Which sheet forming operations were used in the manufacturing process of the product shown in the figure?
What are the advantages of cold forming?
What are the required properties for cold-processed metals?
Calculate clearance between the steel punch and the die z (mm). The material thickness is 1.7 mm, tensile strength 281 MPa, and the type of punch-dependent factor k is 0.01.
where k – punch material-dependent factor s – material thickness, mm; Rm - tensile strength, MPa; tau 1 (τ1) – material shear strength (τ1= Rm x 0.8), MPa.Provide the answer in millimeters with accuracy of three decimal places. Use "." as decimal separator.
Calculate the punch force F (N) required to complete blanking. Circle with diameter of 18.5 mm must be cut out of the material with 5.1 mm in thickness and 104 MPa tensile strenght.
where L - the total length sheared, mm; s - thickness of material, mm; τ1 (tau1) - shear strength of material, MPa; Rm - tensile strength of material, MPa.
Relative error +/- 1% allowed. Circle circumference is L=pi()*d.