PPCE - Jig and Fixture

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

• Decoration

• Increase material usage

• Improve accuracy and productivity

• Reduce tool life

Which of the following is a key difference between a jig and a fixture?

• Jigs are used only for welding

• Fixtures guide the tool

• Jigs guide the tool, fixtures only hold the workpiece

• Both are exactly the same

Which component of a jig/fixture ensures that the workpiece stays in position during machining?

• Bush

• Clamp

• Base plate

• Guide

What is the role of a drill bush in a jig?

• To hold the tool

• To cool the tool

• To guide the cutting tool

• To support the jig

What is the first and most important factor in designing a jig or fixture?

• Appearance

• Machining operation to be performed

• Tool color

• Price of machine

What should be avoided while designing clamps in a jig/fixture?

• High pressure on the tool

• Minimum surface contact

• Unnecessary vibrations

• Easy handling

What is the effect of over-clamping in fixture design?

• Improves rigidity

• Increases accuracy

• May distort the workpiece

• Improves productivity

Which factor affects the rigidity of a fixture most?

• Color of the fixture

• Base thickness and material

• Operator skill

• Drill speed

Why should chip removal be considered in jig design?

• To make the jig look neat

• To prevent tool damage and maintain accuracy

• To increase the weight of the jig

• To reduce the number of clamps used

Which of the following is commonly integrated with automatic jigs and fixtures?

• Wooden clamps

• Manual indexing plates

• Hand-operated hammers

• Pneumatic or hydraulic actuators