Explanation Drawing can be defined as the method in which metal or material is dragged through the die that leads to a decrease in thickness. This process is very much similar to the process of extrusion, but the major difference is the use of exerted force. Extrusion is the process in which material is forces to pass through die, so that the change in the shape of the material can take place. This process is used to create a product that has a fixed cross-sectional profile. The comparison between the conventional extrusion, wire drawing, and continuous extrusion is shown below using tabular form. Process Possible materials Reduction in area Typical temperature Process parameters Speeds Conventional extrusion Aluminum, Magnesium, Lead alloys. 10 % to 40 % At most annealed temperatures 300 m / min

DeGarmo's Materials and Processes in Manufacturing

12th Edition

ISBN: 9781118987674

Author: J. T. Black, Ronald A. Kohser

Publisher: WILEY

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Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the s…

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You have been asked to work on some design problems and technically support the team working on extrusion and forging operations: 1) The team are extruding a billet that is 80 mm long with diameter of 40 mm is directly to a diameter of 20 mm. The extrusion die has a die angle of 75°, see Figure 1. For the work metal, K = 600 MPa and n = 0.25. In the Johnson extrusion strain equation, a = 0.8 and b = 1.4. Remaining billet length 75 Ram pressure, p D. Dr Figure 1: Extrusion process. Determine the following design parameters: (a) Extrusion ratio. (b) True strain (homogeneous deformation). (c) Extrusion strain. (d) Ram pressure at L= 80, 40, and 10 mm. (e) Draw the relationship between the ram pressure and billet length and discuss the results. What are your recommendations to dccrcase the required ram pressure?

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DeGarmo's Materials and Processes in Manufacturing

Ch. 18 - Briefly describe the evolution of forming...Ch. 18 - What are some of the possible means of classifying...Ch. 18 - How are bulk deformation processes different from...Ch. 18 - Prob. 4RQ Ch. 18 - Prob. 5RQ Ch. 18 - Prob. 6RQ Ch. 18 - Prob. 7RQ Ch. 18 - Why is it undesirable to minimize friction between...Ch. 18 - Prob. 9RQ Ch. 18 - Prob. 10RQ

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Solution Summary: The author explains the differences between drawing and extrusion, and compares them using tabular form.

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