Manufacturing Engineering And Technology
7th Edition
ISBN: 9789810694067
Author: Stephen R. Schmid (author) Serope Kalpakjian (author)
Publisher: Pearson Education Orphans
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Textbook Question
Chapter 15, Problem 29QLP
Can spur gears be made by (a) drawing and (b) extrusion? Can helical gears? Explain.
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Chapter 15 Solutions
Manufacturing Engineering And Technology
Ch. 15 - How does extrusion differ from rolling and...Ch. 15 - Explain the difference between extrusion and...Ch. 15 - What is a spider die? What is it used for?Ch. 15 - Why are wires sometimes drawn in bundles?Ch. 15 - What is a dead-metal zone?Ch. 15 - Define the terms (a) cladding, (b) dummy block,...Ch. 15 - Why is glass a good lubricant in hot extrusion?Ch. 15 - What types of defects may occur in (a) extrusion...Ch. 15 - Describe the difference between direct and reverse...Ch. 15 - What is land? What is its function in a die?
Ch. 15 - How are tubes extruded? Can they also be drawn?...Ch. 15 - Prob. 12RQCh. 15 - What is the difference between piping and...Ch. 15 - What is impact extrusion?Ch. 15 - What is the pipe defect in extrusion?Ch. 15 - List the similarities and differences between...Ch. 15 - Explain why extrusion is a batch, or...Ch. 15 - The extrusion ratio, die geometry, extrusion...Ch. 15 - Explain why cold extrusion is an important...Ch. 15 - What is the function of a stripper plate in impact...Ch. 15 - Explain the different ways by which changing the...Ch. 15 - Glass is a good lubricant in hot extrusion. Would...Ch. 15 - How would you go about avoiding center-cracking...Ch. 15 - Table 15.1 gives temperature ranges for extruding...Ch. 15 - Will the force in direct extrusion vary as the...Ch. 15 - Comment on the significance of metal flow patterns...Ch. 15 - In which applications could you use the type of...Ch. 15 - What is the purpose of the land in a drawing die?...Ch. 15 - Can spur gears be made by (a) drawing and (b)...Ch. 15 - How would you prepare the end of a wire in order...Ch. 15 - What is the purpose of a dummy block in extrusion?...Ch. 15 - Describe your observations concerning Fig. 15.9.Ch. 15 - Occasionally, steel wire drawing will take place...Ch. 15 - Explain the advantages of bundle drawing.Ch. 15 - Under what circumstances would backward extrusion...Ch. 15 - Why is lubrication detrimental in extrusion with a...Ch. 15 - In hydrostatic extrusion, complex seals are used...Ch. 15 - Describe the purpose of a container liner in...Ch. 15 - Estimate the force required in extruding 7030...Ch. 15 - Assuming an ideal drawing process, what is the...Ch. 15 - Prob. 41QTPCh. 15 - Calculate the extrusion force for a round billet...Ch. 15 - Prob. 43QTPCh. 15 - A round wire made of a perfectly plastic material...Ch. 15 - Assume that the summary to this chapter is...Ch. 15 - Prob. 47SDPCh. 15 - Figure 15.2 shows examples of discrete parts that...Ch. 15 - The parts shown in Fig. 15.2 are economically...Ch. 15 - Survey the technical literature, and explain how...Ch. 15 - Prob. 51SDPCh. 15 - List the processes that are suitable for producing...
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- In a sheet metal forming press, the shape to be formed is hemispherical cup of radius 15 cm in 2mm thick mild steel sheet. The force required to deform sheet is 8 kN. The forming hammer should approach job from a distance of 30 cm. The production rate required is 240 components/hr. Calculate and suggest the following specifications of the various hydraulic components used: a. Hydraulic cylinder (bore & length); b. Pump pressure and flow rate; c. Electric motor HP considering 75% pump efficiency; d. Reservoir size; and e. Size of pump inlet and discharge tubing.arrow_forwardIf the shafts on the two gears shown in this figure had the same diameter, but were made of different materials, which shaft should be made of the stronger material to avoid breakage? (Hint: The torque exerted on each shaft must be the same as the torque on the gear to which it is attached.)arrow_forwardWhat is the Mannesmann milling process? Why is the Mannesmann piercing process not capable of producing extremely long lengths of seamless tubing?arrow_forward
- A product is to be reproduced, Provided that the weight of the solid steel shaft with a length of 1m and a diameter of 100 mm does not change. It is produced from the same material with an outer diameter of 150mm. For both shafts; Compare the torques applied when it rotates as Ø= 0.716 radians in case of torsion.arrow_forwardHeat treatments optimize the performance and extend the life of gears in service by altering their chemical, metallurgical, and physical properties. To what extent do you agree or disagree with this statement? Support your opinion with FOUR (4) relevant examples of suitable process to prevent such a gear failurearrow_forwardExplain what you know about crystallographic anisotropy, which has an important place in sheet metal forming operations, with the help of shapes and formulations.arrow_forward
- Explain the properties and applications of High Speed Steelarrow_forwardWhat is the manufacturing process of lathe bed? Which material will be suitable for the product? Justify your answer.arrow_forwardFor symmetric and large circular section which pattern is preferred? Explain with figuresarrow_forward
- Explain the principle used in Residual Stress Measurment with advantages, disadvantages and aplicationarrow_forwardThere are two common manufacturing processes that create long metal parts witha constant cross-section. With the aid of diagrams, explain these two processesand identify the similarities and differences between them.arrow_forwardExplain how?arrow_forward
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