18 Questions
What happens when the bending radius is smaller than the minimum bending radius?
The sheet fractures
What is the typical Reduction of area (R) for Low carbon steels?
22-34 %
What is the condition for safe bending operations?
Rmin > 0
What happens when the bending radius is larger than the maximum bending radius?
The sheet undergoes elastic deformation
What is the assumption made about the neutral axis in the bending process?
The neutral axis remains at the center
What is the formula to calculate the deformation at the extrados?
Y = εt / 2R
What is a characteristic of progressive dies?
They can couple blanking and bending operations.
What is the primary advantage of high-speed steels over carbon and chromium steels?
They have better abrasion resistance.
Which material is known for its high wear resistance and is often used for punching and blanking?
Tungsten carbide
What is the typical application of carbon steels in stamping?
Stamping of aluminum alloys and mild steels.
What is the significant benefit of using metal carbides in punching and blanking?
They have longer lifetimes than high-speed steels.
What is the typical range of pieces that can be produced before resharpening is required for high-speed steels?
2,000 to 300,000 pieces.
What is the formula for estimating the maximum cutting force in horizontal shear edge?
Fmax = τ t w
What is the purpose of clearance in punching and blanking operations?
To design the proper punch and die sizes
What is the difference between punching and blanking operations?
The purpose of the operation
What is the relationship between the die opening and the punch size in punching and blanking operations?
The die opening is always larger than the punch size
What is the approximated value of shear strength in terms of tensile strength?
τ ≈ 4/5 UTS
What is the area under the force-penetration curve in a punching operation?
The cutting work
Test your knowledge on manufacturing and assembly technologies, specifically on progressive dies, punching, blanking, and bending processes. This quiz covers various aspects of metalworking and fabrication. Evaluate your understanding of carbon steels and other materials used in these processes.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
