Production Technology — Winter 2019

Define Non-conventional machining? Why do we need these processes? Give classification of the Non conventional processes?

Draw neat sketch of single point cutting tool indicating its complete geometry.

Draw Merchant’s force diagram. Derive the equations for frictional force, normal reaction, shear force and normal force.

In orthogonal cutting, the feed of tool is 1.25 mm/rev and chip thickness after cutting is 2 mm. The tool bit has a rake angle of 10º. If shear strength = 600 N/mm2, Width of cut = 10 mm, Cutting speed = 30 m/min, Co-efficient of friction = 0.9, Determine the (1) Chip thickness ratio (2) Shear angle (3) Shear force (4) Friction angle (5) Cutting force and (6) Horse power at cutting tool.

The following equation for tool life is given for a turning operation, V T0.13 f0.77 d0.37 = C A 60 min tool life was obtained while cutting at V = 30 m/min, f = 0.3 mm/rev and d = 2.5mm. Determine the changes in tool-life if the cutting speed, feed and depth of cut are increased by 20% individually and also taken together.

Enlist various thread manufacturing processes? Explain with neat sketch.

Compare gear Hobbing and gear Shaping processes with neat diagrams.

Differentiate between Jigs and Fixture. Enlist different types of clamping devices. Explain any two with neat sketches.

List various principles of location and explain 3-2-1 Principal of Location with neat sketches.

Enlist methods to measure cutting temperature and explain any two.

Explain various machine tool structures, based on rigidity.

Explain significance of center of pressure in design of press tools. How is it calculated?

Describe the common bending operations performed on presses.

What are guide-ways? What are the principal requirements of them? Enlist various types of guide ways used in machine tools. Explain any two in detail.

What is difference between a Capstan & Turret lathe? Describe in brief with the help of suitable sketch.

Explain working principle of EDM. What are main process parameters? State advantages, disadvantages and applications of EDM.

Explain principle of Ultrasonic machining with help of neat diagram. State its advantages and application.