EBK MANUFACTURING PROCESSES FOR ENGINEE
6th Edition
ISBN: 9780134425115
Author: Schmid
Publisher: YUZU
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Chapter 5, Problem 5.72P
To determine
The sketch of the wooden pattern.
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When designing patterns for casting, patternmakers use special rulers that automatically incorporate solid shrinkage allowances into their designs. For example, a 12-in. patternmaker’s ruler is longer than 1 foot. How long should a patternmaker’s ruler be for making patterns for (a) aluminum castings and (b) high-manganese steel?
For a sand casting a steel rectangular plate with dimensions 80mm x 120mm x 20mm. Calculate shrinkage and draft allowance. And draw the designed pattern. Assume shrinkage of material as 0.1% for 12 inch, pattern material is wood and assume suitable draft angles
Which one is better for the casting structure (a) and (b) in the following figures? Why?
Chapter 5 Solutions
EBK MANUFACTURING PROCESSES FOR ENGINEE
Ch. 5 - Prob. 5.1QCh. 5 - Prob. 5.2QCh. 5 - Prob. 5.3QCh. 5 - Prob. 5.4QCh. 5 - Prob. 5.5QCh. 5 - Prob. 5.6QCh. 5 - Prob. 5.7QCh. 5 - Prob. 5.8QCh. 5 - Prob. 5.9QCh. 5 - Prob. 5.10Q
Ch. 5 - Prob. 5.11QCh. 5 - Prob. 5.12QCh. 5 - Prob. 5.13QCh. 5 - Prob. 5.14QCh. 5 - Prob. 5.15QCh. 5 - Prob. 5.16QCh. 5 - Prob. 5.17QCh. 5 - Prob. 5.18QCh. 5 - Prob. 5.19QCh. 5 - Prob. 5.20QCh. 5 - Prob. 5.21QCh. 5 - Prob. 5.22QCh. 5 - Prob. 5.23QCh. 5 - Prob. 5.24QCh. 5 - Prob. 5.25QCh. 5 - Prob. 5.26QCh. 5 - Prob. 5.27QCh. 5 - Prob. 5.28QCh. 5 - Prob. 5.29QCh. 5 - Prob. 5.30QCh. 5 - Prob. 5.31QCh. 5 - Prob. 5.32QCh. 5 - Prob. 5.33QCh. 5 - Prob. 5.34QCh. 5 - Prob. 5.35QCh. 5 - Prob. 5.36QCh. 5 - Prob. 5.37QCh. 5 - Prob. 5.38QCh. 5 - Prob. 5.39QCh. 5 - Prob. 5.40QCh. 5 - Prob. 5.41QCh. 5 - Prob. 5.42QCh. 5 - Prob. 5.43QCh. 5 - Prob. 5.44QCh. 5 - Prob. 5.45QCh. 5 - Prob. 5.46QCh. 5 - Prob. 5.47QCh. 5 - Prob. 5.48QCh. 5 - Prob. 5.49QCh. 5 - Prob. 5.50QCh. 5 - Prob. 5.51QCh. 5 - Prob. 5.52QCh. 5 - Prob. 5.53QCh. 5 - Prob. 5.54QCh. 5 - Prob. 5.55QCh. 5 - Prob. 5.56QCh. 5 - Prob. 5.57QCh. 5 - Prob. 5.58QCh. 5 - Prob. 5.59QCh. 5 - Prob. 5.60QCh. 5 - Prob. 5.61PCh. 5 - Prob. 5.62PCh. 5 - Prob. 5.63PCh. 5 - Prob. 5.64PCh. 5 - Prob. 5.65PCh. 5 - Prob. 5.66PCh. 5 - Prob. 5.67PCh. 5 - Prob. 5.68PCh. 5 - Prob. 5.69PCh. 5 - Prob. 5.70PCh. 5 - Prob. 5.71PCh. 5 - Prob. 5.72PCh. 5 - Prob. 5.73PCh. 5 - Prob. 5.74PCh. 5 - Prob. 5.75PCh. 5 - Prob. 5.76PCh. 5 - Prob. 5.77PCh. 5 - Prob. 5.78PCh. 5 - Prob. 5.79PCh. 5 - Prob. 5.80PCh. 5 - Prob. 5.81PCh. 5 - Prob. 5.82PCh. 5 - Prob. 5.83PCh. 5 - Prob. 5.84PCh. 5 - Prob. 5.85PCh. 5 - Prob. 5.86PCh. 5 - Prob. 5.87PCh. 5 - Prob. 5.88PCh. 5 - Prob. 5.89PCh. 5 - Prob. 5.90PCh. 5 - Prob. 5.91PCh. 5 - Prob. 5.92PCh. 5 - Prob. 5.93DCh. 5 - Prob. 5.94DCh. 5 - Prob. 5.95DCh. 5 - Prob. 5.96DCh. 5 - Prob. 5.97DCh. 5 - Prob. 5.98DCh. 5 - Prob. 5.99DCh. 5 - Prob. 5.100DCh. 5 - Prob. 5.101DCh. 5 - Prob. 5.102DCh. 5 - Prob. 5.103DCh. 5 - Prob. 5.104DCh. 5 - Prob. 5.105DCh. 5 - Prob. 5.106DCh. 5 - Prob. 5.107DCh. 5 - Prob. 5.108DCh. 5 - Prob. 5.109DCh. 5 - Prob. 5.110DCh. 5 - Prob. 5.111DCh. 5 - Prob. 5.112DCh. 5 - Prob. 5.113DCh. 5 - Prob. 5.114DCh. 5 - Prob. 5.115D
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- Determine the time required to fill the mold cavity along with the riser as shown in the following figure. A slab of 1500 mm x 750 mm x 500 mm is required to be cast using a sand casting process. It was observed previously that the total solidification time (T) for this casting = 1.6 min. Find out the cylindrical riser dimensions (diameter to height ratio = 1) for a solidification time T = 5 min.arrow_forwardConsider the yellow metal mounting clip shown in Figure 3. Your job shop has been contracted to make 1,000 pieces this year, with possibility of making 2,000 more each year in the future. Consider the process options below, which option is the best? a) using investment casting, cast each clip paint each clip b) using a shearing press, pierce the hole, the slots and the 'gap/break' of each clip from a piece of flat sheet metal using a shearing press, blank each clip from the pierced piece of flat sheet metal deburr each clip as necessary using a press brake, make two bends in each clip acid-pickle wash each clip paint each clip c) Using a sand mold, casting each clip clean each clip paint each clip d) using injection molding, mold each clip paint each cliparrow_forwardYou were required to make 1000 simple small parts in aluminum. Would using a permanent mold be less expensive per part then preparing 1000 sand molds explain?arrow_forward
- A aluminium alloy casting has a cylindrical geometry with 100mm in diameter and weighs 3200 gram. This casting takes 7.5 min to completely solidify. Another smaller and lighter cylindrical-shaped casting with the same diameterto-length ratio weighs 1800 gram. This casting is made of the same aluminium alloy and the same conditions of mold and pouring were used. Determinea) The mold constant in Chvorinov’s Rule,b) The dimensions of the lighter castingc) The total soldification time of the lighter casting. The density of aluminium alloy= 2.7 gram/cm3and n=2arrow_forwardWhen casting a 4x10x20 in. Part, which has a top overflow with a H / D = 1.5 ratio, you want to determine the height and diameter of the overflow to prevent shrinkage in the part to be cast. Note: Remember that to achieve this, the overflow has to solidify some time after the piece has solidified, since in this case the overflow acts as a riser.arrow_forwardg) .................. is used in the production of very indented-protruding parts by forging in closed molds.h) It is .................. which ensures higher strength of bolts produced by rolling.arrow_forward
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- How did you get that first equationarrow_forward2) The part shown in Figure is to be pressed from fine copper powders using a compaction pressure of 1000 MPa. Dimensions are milimetres. Determinea) the required press tonnage to perform this operationb) the final weight of the part if the porosity is 15%. Assume shrinkage during sintering can be neglected. (the desity of copper =8,97g/cm3 )arrow_forwardA cubical casting of 100 mm side is to be made from steel using an Al pattern (master pattern). For preparing the master pattern, a wooden pattern is used. Determine the dimensions of master pattern and wooden pattern. Use shrinkage allowance (mm/mm) for steel and Al as 0.021 and 0.013 respectivelyarrow_forward
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