Progressive Die and Cup Drawing Process Quiz

Play an AI-generated podcast conversation about this lesson

What is one advantage of a mechanical press over a hydraulic press?

Can adjust stroke length with precision

Develops greater than rated tonnage due to inertia of the flywheel (correct)

Provides smoother operation for thin metal sheets

Prevents overloading by limiting force

What is the function of the blanking punch in a progressive die?

Forming the cup

Cutting a hole in the stock

Blanking out a portion of the metal (correct)

Producing a finished washer

In the context of a progressive die, what happens after the first stroke?

A cup will be drawn

A metal portion will be blanked out

A washer will be produced

A hole will be punched (correct)

Why are most mechanical presses provided with extra strong frames?

To handle occasional overloading Signup and view all the answers

What is the role of the piercing punch in a progressive die?

Cutting holes in the stock Signup and view all the answers

What happens if a mechanical press brake is overloaded?

Serious damage can occur from improper setup Signup and view all the answers

What is the significance of the negligible corner radius of the cup in drawing from a steel sheet?

Decreases the drawing force required Signup and view all the answers

In what aspect is hydraulic press brake stroke control superior to mechanical press stroke control?

Adjustability of length and location of stroke Signup and view all the answers

Why are hydraulic press brakes often preferred for segmental forming?

Offer greater degree of stroke control Signup and view all the answers

How does the yield strength of steel affect the drawing process from a steel sheet?

Reduces the drawing force required Signup and view all the answers

What feature allows hydraulic press brakes to have a dwell period that is not possible in mechanical presses?

Adjustable point of rapid advance and return of the ram Signup and view all the answers

What is the composition of water hardening steel?

0.6-1.4C Signup and view all the answers

Which type of steel has a hardness range of 57-62 HRC?

Oil hardening steel Signup and view all the answers

What is the primary alloying element in high carbon high chromium (HCHC) non shrinking tool steel?

Chromium Signup and view all the answers

Which material is more suitable for delicate and slender punches due to less distortion during heat treatment?

High Carbon High Chromium (HCHC) Steel Signup and view all the answers

Which material is commonly used for elements like screws subjected to high tensile stresses?

Carbon Steel Signup and view all the answers

What is the hardness range of Mo H.S.S. steel?

60-65 HRC Signup and view all the answers

In blanking operation, why is shear provided on the die?

To facilitate the cutting process Signup and view all the answers

What is the purpose of specifying the tonnage at a crank angle for a press?

To ensure safe force limits for press components Signup and view all the answers

What is the main purpose of the flywheel in a press according to the text?

To store and release energy during operations Signup and view all the answers

Which component of a press is designed to exert a defined amount of force at a given crank angle?

Main crankshaft Signup and view all the answers

Why must the energy supplied by the flywheel be more than the energy needed for operations in a press?

To ensure energy satisfying criteria Signup and view all the answers

What determines the size of the blank in a blanking operation?

The size of the die opening Signup and view all the answers

What is the purpose of providing shear on the die in blanking operation?

To decrease cutting force Signup and view all the answers

Why is correct orientation of grain direction necessary in arranging the strip layout?

To ensure parts are dimensionally accurate Signup and view all the answers

Why is a shaving operation needed after blanking?

To remove roughness and unevenness from the edges Signup and view all the answers

What does the required blank size in blanking operation equal to?

Die opening size Signup and view all the answers

Why are cutting and non-cutting operations not combined in one station of progressive die?

Because they require different types of tooling Signup and view all the answers

What is the main reason for providing clearance on the punch in blanking operation?

To obtain the required punch size Signup and view all the answers