Design of Product and Machine Tools — Summer 2021

What are the requirements of machine tool design?

Name the Devices used for intermittent motion. Explain Ratchet- gear Mechanism in detail.

Explain various Elementary transmission for transmitting Rotary motion. 1.Gear transmission, 2. Belt transmission, 3. Chain Transmission.

Discuss various properties of Materials used for sliding contact bearing.

Explain designating ball and roller bearing in S.A.E., SKF, and BIS with example.

With neat sketch explain following gear box: (1) Feed box with sliding gear (2) Feed box with Meander's mechanism.

Design hydrodynamic journal bearing for a shaft of blower for following data: Bearing Load due to belt force: 3000N, Bearing Load due to weight of rotor: 600N, Speed of Blower: 600 rpm, diameter of shaft: 50 mm, Expected temperature of oil:70°, ambient temperature: 30°, c/d ratio - 0.0015, Minimum film thickness: 0.019 mm Calculate: actual attitude, type of oil used, power loss, heat generated, actual minimum film thickness.

Give the classification of bearing based on type of friction and load.

Discuss various types of Bed structure and wall arrangements and their applications with neat sketch.

Explain the design procedure of Slideways for wear resistance.

Why it is important to adjust the clearance in slide ways?

Write a note on Antifriction Guideways.

Give requirement of Protecting devices for slide ways and explain various types of protecting devices with neat sketch.

Classify wire ropes with sketches.

How does the design of sheave and pulley differ?

Find the diameter of rope required for an overhead travelling crane with lifting magnet. Take, Lifting capacity: 5000 kg, Weight lifting magnet = 2000 kg, weight lifting tackle = 120 kg, Lifting height = 8 meters, No of Rope parts = 4Take Dmin/d = 23, d =0.045, E=8*104 N/mm2, σ = 1500 N/mm2 w r u OR1

Give the application of a cast hook and a forged hook with appropriate reason.

Draw diagram of material handling system with rope bending diagram for multiple crane pulley having 3 and 6 bends.

Design the crane hook for the lifting capacity of 5 tonnes, having triangular section. Take permissible tensile stress 80 N/mm2 for forged steel.

Discuss the role of Quality in Product design.

Discuss product design in a viewpoint of: (1) Aproduction manager, (2) Quality control

Discuss the importance of selection of proper tolerance for part dimensions.

Discuss following in brief: 1. Product diversification 2. Modular design

Discuss the importance of various Design software in developing the products.

Discuss the observations that you made from the design of today’s car body considering aspects of Product Design