Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 24, Problem 12RQ
Explain why the axis of a hob is tilted with respect to the axis of the gear blank.
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The radial distance between the addendum circle of a gear and the dedendum circle of a gear is known as ______________________.
clearance
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circular pitch
total depth
How many revolutions per minute is a spur gear turning, if it has 30 teeth, a circular pitch of 0.785-in. and a pitch line velocity of 15 ft/sec?
In a single-stage gear wheel system with an evolvent profile, the rotating (driveThe number of teeth of the gear is Z1=10, the number of teeth of the rotated gear is Z2=20 and the modulus is m=5 mm; The rotating gear rotates clockwise.a) By calculating gear sizes; Draw in 1:1 scale.
Chapter 24 Solutions
Manufacturing Engineering & Technology
Ch. 24 - Explain why milling is such a versatile machining...Ch. 24 - Describe a milling machine. How is it different...Ch. 24 - Describe the different types of cutters used in...Ch. 24 - Define the following: face milling, peripheral...Ch. 24 - Can threads be machined on a mill? Explain.Ch. 24 - What is the difference between feed and feed per...Ch. 24 - Explain the relative characteristics of climb...Ch. 24 - Describe the geometric features of a broach and...Ch. 24 - What is a pull broach? A push broach?Ch. 24 - Why is sawing a commonly used process? Why do some...
Ch. 24 - What advantages do bed-type milling machines have...Ch. 24 - Explain why the axis of a hob is tilted with...Ch. 24 - What is a shell mill? Why is it used?Ch. 24 - Why is it difficult to saw thin sheet metals?Ch. 24 - Of the processes depicted in Fig. 24.2, which is...Ch. 24 - Describe the tool motion during gear shaping.Ch. 24 - When is filing necessary?Ch. 24 - Would you consider the machining processes...Ch. 24 - Why is end milling such an important versatile...Ch. 24 - List and explain factors that contribute to poor...Ch. 24 - Explain why broaching crankshaft bearings is an...Ch. 24 - Several guidelines are presented in this chapter...Ch. 24 - What are the advantages of helical teeth over...Ch. 24 - Explain why hacksaws are not as productive as band...Ch. 24 - What similarities and differences are there in...Ch. 24 - Why do machined gears have to be subjected to...Ch. 24 - How would you reduce the surface roughness shown...Ch. 24 - Why are machines such as the one shown in Fig....Ch. 24 - Comment on your observations concerning the...Ch. 24 - Explain how contour cutting could be started in a...Ch. 24 - Prob. 32QLPCh. 24 - Describe the parts and conditions under which...Ch. 24 - Explain the reason that it is difficult to use...Ch. 24 - Would you recommend broaching a keyway on a gear...Ch. 24 - Prob. 37QTPCh. 24 - A slab-milling operation is being performed at a...Ch. 24 - Show that the distance lc in slab milling is...Ch. 24 - Prob. 40QTPCh. 24 - Calculate the chip depth of cut, tc, and the...Ch. 24 - Estimate the time required to face mill a...Ch. 24 - A 12-in.-long, 1-in.-thick plate is being cut on a...Ch. 24 - A single-thread hob is used to cut 40 teeth on a...Ch. 24 - Assume that m the face-milling operation shown in...Ch. 24 - A slab-milling operation will take place on a part...Ch. 24 - Prob. 47QTPCh. 24 - In describing the broaching operations and the...Ch. 24 - The parts shown in Fig. 24.1 are to be machined...Ch. 24 - Would you prefer to machine the part in Fig. 24....Ch. 24 - Prob. 51SDPCh. 24 - Suggest methods whereby milling cutters of various...Ch. 24 - Prepare a comprehensive table of the process...Ch. 24 - Prob. 55SDPCh. 24 - Make a list of all the processes that can be used...
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- What is the pressure angle for gear teeth? Why would some gears have different pressure angles?arrow_forwardExplain various types of Gear. With the help of a neat sketch, explain the law of gearing? Explain the need of clearance in a gear. What are the harmful effect of backlash error?arrow_forward» Question 1 A reverted gear train with a speed ratio of 12 consists of four gear wheels. Gear A has a module pitch of 3 mm and is meshed with gear B. Whereas gear C that is meshed with gear D has a module pitch of 2.5 mm. Gear B and C form a compound gear system. The distance between axis of rotation of driving gear A and driven gear B is equal to 200 mm. If gear A has 24 teeth, determine the suitable number of teeth for all gears. Question 2 A Porter governor has a minimum speed of 134 rpm and a range of speed of 21 rpm. All four arms of the governor are equal in length, and each is equal to 250 m. The ball mass and the central mass loaded on the sleeve are 5 kg and 15 kg, respectively. Calculate the angle between the two upper arms of the governor when the governor starts to lift and when the governor is at maximum. Question 3 A crank shaft of an engine shown in Figure 1 is connected to a flywheel and have a mean speed of 200 rpm. The angle 0 represents the movement of the crack…arrow_forward
- A pinion and gear are running in mesh. The gear pair has a diametral pitch of 6. has 24 teeth, what is the corresponding pitch diameter of the pinion? 2 in (A) (B) (C) 3 in 4 in (D) 5 in (E) 6 inarrow_forwardWhat is benefits of cycloidal gear?arrow_forwardType the name of the part in the blank provided below. We have flywheel present in manual gear cars but We have present in automatic gear cars.arrow_forward
- Explain the difference between concentric turning and eccentric turning.arrow_forwardHey there! Calculate the IMA of the interlocking gears shown if the larger wheel (30 teeth) is turning the smaller wheel (24 teeth). Thanks! :)arrow_forwardThe radial distance between the top of one gear tooth and the bottom of another gear tooth when two gears are in mesh is known as ______________________. working depth circular pitch total depth clearancearrow_forward
- A twin-spindle drill simultaneously drills one ½-in hole and one ¾" through a 1" wide work piece. Both holes are twist drill with 118° point angles. cutting speed for material is 230 ft/min. The rotation speed of each spindle can be configured individually. The feed rate of both holes must be set to the same value, since both spindles go down at the same speed. The forward speed is set in such a way that the speed total metal removal does not exceed 1.50 in3 /min. Determine: a) the velocity maximum feedrate (in/min) that can be used, b) the individual feedrates (in/rev) that result in each hole and c) the time required to drill the holes.arrow_forwardAn epicyclic gear train has 3 shafts A,B and CA is an input shaft running at 100 rpm clockwise. B is an output shaft running at 250 rpm clockwise. Torque on A is 50 kNm (clockwise). C is a fixed shaft. The torque to fix Carrow_forwardIn a pair of gear, if the number of teeth of the driving gear is 100 and that of the driven gear is 50, then the transformation ratio is equal to:arrow_forward
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