4 Unit 44 Cutting processes

Which cutting process provides excellent accuracy and flexibility for both small and large batches but involves high equipment and programming costs?

• Shearing

• Sawing

• Laser cutting and CNC punch pressing

• Presswork

Which of the following profiles is nibbling especially suited for?

• Straight profiles

• Irregular or non-linear profiles

• Circular profiles only

• Rectangular profiles only

Nibbling is often used for prototyping or small production runs because it avoids the need for expensive, custom-made dies.

• True

• False

What is shearing in the context of sheet metal work?

• Shearing is one of the most common processes for cutting sheet metal, and it works by applying a shearing force across the sheet using a pair of blades.

• Shearing is a process of heating sheet metal until it melts and then reshaping it.

• Shearing is a method of joining two metal sheets using rivets.

• Shearing is a process of coating sheet metal with a protective layer.

Shearing is common in which of the following applications?

• Roofing

• HVAC ducting

• General workshop cutting

• All of the above

Bench shearing is limited to straight cuts.

• True

• False

In blanking, the cut-out portion of the sheet is the product, whereas in piercing, the hole left in the sheet is the intended product.

• True

• False

What are some components produced using blanking and piercing in the automotive, appliance, and electronics industries?

• A) Washers, gaskets, brackets, and panels

• B) Bolts and nuts

• C) Springs and wires

• D) Tubes and pipes

The major limitation of presswork is the cost of tooling.

• True

• False

What is the main purpose of using jigs and fixtures in drilling operations?

• To increase the speed of drilling

• To ensure accuracy

• To reduce the size of holes

• To change the color of the metal