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Questions and Answers
What happens when the bending radius is smaller than the minimum bending radius?
What happens when the bending radius is smaller than the minimum bending radius?
- The sheet undergoes a change in thickness
- The sheet undergoes elastic deformation
- The sheet fractures (correct)
- The sheet only bends under plastic deformation
What is the typical Reduction of area (R) for Low carbon steels?
What is the typical Reduction of area (R) for Low carbon steels?
- 13-28 %
- 60-70 %
- 40-50 %
- 22-34 % (correct)
What is the condition for safe bending operations?
What is the condition for safe bending operations?
- Rmin ≈ 0
- Rmin < 0
- Rmin > 0 (correct)
- Rmin = 1
What happens when the bending radius is larger than the maximum bending radius?
What happens when the bending radius is larger than the maximum bending radius?
What is the assumption made about the neutral axis in the bending process?
What is the assumption made about the neutral axis in the bending process?
What is the formula to calculate the deformation at the extrados?
What is the formula to calculate the deformation at the extrados?
What is a characteristic of progressive dies?
What is a characteristic of progressive dies?
What is the primary advantage of high-speed steels over carbon and chromium steels?
What is the primary advantage of high-speed steels over carbon and chromium steels?
Which material is known for its high wear resistance and is often used for punching and blanking?
Which material is known for its high wear resistance and is often used for punching and blanking?
What is the typical application of carbon steels in stamping?
What is the typical application of carbon steels in stamping?
What is the significant benefit of using metal carbides in punching and blanking?
What is the significant benefit of using metal carbides in punching and blanking?
What is the typical range of pieces that can be produced before resharpening is required for high-speed steels?
What is the typical range of pieces that can be produced before resharpening is required for high-speed steels?
What is the formula for estimating the maximum cutting force in horizontal shear edge?
What is the formula for estimating the maximum cutting force in horizontal shear edge?
What is the purpose of clearance in punching and blanking operations?
What is the purpose of clearance in punching and blanking operations?
What is the difference between punching and blanking operations?
What is the difference between punching and blanking operations?
What is the relationship between the die opening and the punch size in punching and blanking operations?
What is the relationship between the die opening and the punch size in punching and blanking operations?
What is the approximated value of shear strength in terms of tensile strength?
What is the approximated value of shear strength in terms of tensile strength?
What is the area under the force-penetration curve in a punching operation?
What is the area under the force-penetration curve in a punching operation?
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