Precision Machining Technology
3rd Edition
ISBN: 9781337795302
Author: Peter, Hoffman.
Publisher: Cengage Learning,
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Textbook Question
Chapter 6.3, Problem 14RQ
When roughing a pocket, should you machine in a clockwise or counterclockwise direction, and why?
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A batch of 10 cutting tools could produce 500
components while working at 50 rpm with a tool
feed of 0.25 mm/rev and depth of cut of 1 mm.
A similar batch of 10 tools of the same
specification could produce 122 components while
working at 80 rpm with a feed of 0.25 mm/rev and
1 mm depth of cut. How many components can
be produced with one cutting tool at 60 rpm?
Read the sentences given below and Identify the wrong statement.
Sentence 1. The advantage of an independent chuck is that the work can be centered to
high precision.
Sentence 2. The advantage of an independent chuck is that it is easy to work with.
Sentence 2 is False
None of the sentences are False
Sentence 1 is False
Sentence 1 and 2 are False
Answer the following questions by circling True or False.
5. Tool layouts can be converted into a cam profile that is used for the control of the tool.
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6. Higher the rake angle, less the cutting forces.
7. A very large clearance angle increases the strength of the tool tip.
8. The continuous chip causes poor surface finish and low tool life.
9. Ceramics are the hardest tool materials in the world.
10. The smaller the cutting ratio, the larger the cutting deformation.
11. A shaper can be used for maching flat surfaces in horizontal and angular directions.
12. During the return stroke of the shaper, the cutting tool will simply be sliding...
13. The cutting speed of the hydraulic shaper changes throughout most of the cutting stroke.
14. Arbour-mounted cutters are used in vertical axis machines to generate flat surfaces...
15. Dividing head is an important attachment that is used to divide the periphery of the workpiece into a
number of divisions to machine surfaces..
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Chapter 6 Solutions
Precision Machining Technology
Ch. 6.1 - What part of the vertical milling machine allows...Ch. 6.1 - Briefly describe the direction of movement...Ch. 6.1 - When a table handle is turned clockwise the table...Ch. 6.1 - What distance does the saddle or table usually...Ch. 6.1 - Prob. 5RQCh. 6.1 - Briefly describe the function of the turret and...Ch. 6.1 - What is the name of the taper found in most modem...Ch. 6.1 - What part of the vertical mill can be raised and...Ch. 6.1 - How can power quill feed be automatically stopped...Ch. 6.1 - What is a benefit of using a DRO instead of...
Ch. 6.2 - Many of the cutters used in machining are made of...Ch. 6.2 - What is the major advantage of using...Ch. 6.2 - Prob. 3RQCh. 6.2 - What type of cutting tool would most likely be...Ch. 6.2 - Which type of cutter would most likely be used to...Ch. 6.2 - What workpiece factors might cause a four-flute...Ch. 6.2 - List three types of milling cutters that are used...Ch. 6.2 - Most manual vertical milling machine spindles are...Ch. 6.2 - A __________ is used to retain the toolholder in...Ch. 6.2 - What type of toolholder might he selected for...Ch. 6.2 - Sketch a corner-rounding endmill.Ch. 6.2 - What toolholding device uses two drive keys and a...Ch. 6.2 - Prob. 13RQCh. 6.2 - List the four basic pieces of a step clamp set: a....Ch. 6.2 - Prob. 15RQCh. 6.2 - Irregularly shaped work may be held in a custom...Ch. 6.3 - List five safety guidelines to observe when...Ch. 6.3 - Briefly describe the process of aligning a milling...Ch. 6.3 - What is chip load?Ch. 6.3 - Define IPM.Ch. 6.3 - Calculate spindle speed and feed for the two...Ch. 6.3 - Briefly describe the process of locating the...Ch. 6.3 - What are two benefits of boring over other...Ch. 6.3 - What are face milling and peripheral milling?Ch. 6.3 - When squaring a block on the vertical mill, what...Ch. 6.3 - What are the three basic methods used to mill...Ch. 6.3 - What must first be done before milling with either...Ch. 6.3 - Prob. 12RQCh. 6.3 - What diameter cutter should be used to create...Ch. 6.3 - When roughing a pocket, should you machine in a...Ch. 6.4 - What is a rotary axis?Ch. 6.4 - Define the term indexing.Ch. 6.4 - Describe the primary differences between the...Ch. 6.4 - Name three types of workpiece features that are...Ch. 6.4 - Briefly describe the two alignment steps that need...Ch. 6.4 - If the outside of a 6"-diameter disk is to be...Ch. 6.4 - What is the gear ratio found in the gear train of...Ch. 6.4 - When using the indexing head, a __________ can be...Ch. 6.4 - A workpiece requires 9 divisions. Calculate the...Ch. 6.4 - In the formula 40D=T,what do T and D represent?
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- TRUE OR FALSE. IF FALSE WHAT WORD MAKES THE STATEMENT INCORRECT AND WHAT IS THE CORRESPONDING CORRECT ANSWER. In Machining the chip dissipates most of the energy. Thus, it has the lowest temperature relative to the workpiece and tool.arrow_forwardWhat is tapping?arrow_forwardIf 50 parts measuring 1" I" 3" each needed a hole drilled in a side, which workholding device would be best?arrow_forward
- Explain any five safety precautions to be followed while working on lathe machine.arrow_forwardMain advantage of the Forming taps is: Evacuates the chips along the shank (for blind holes Creates the thread without cutting Pushes the chips forward through the hole (for through holes)arrow_forwardWhich of the below is true for conventional milling: Chips are removed behind the cutter which reduces the chance of re-cutting Chip width starts from zero and increases which causes more heat to diffuse into the workpiece and produces work hardening O Creates cleaner shear plane which causes the tool to rub less and increases tool lifearrow_forward
- Multiple grooving is most suited for: 4 1 2 3 O Rough grooving when the depth is bigger than the width O Minimizing vibrations and radial forces Machining steel and stainless steel and when the width of the groove is larger than the deptharrow_forward11. With aid of neat sketches, explain the drilling parameters. 12. With aid of neat sketch, explain the main parts of the twist drill cutting tool. 13. With aid of neat sketch, explain the point angle of the twist drill. 14. With aid of neat sketch, explain what is the difference between the counter boring and counter sinking. 15. Define “NC" and "CNC" Terms.arrow_forwardWhat are two reasons boring may be selected to produce a hole instead of drilling and reaming?arrow_forward
- How must the feed rate for tapping using a floating holder be programmed differently than that for rigid tapping?arrow_forwardUp milling operation, the work is feed in the same direction the rotation of the cutter. Select one: True Falsearrow_forward7. What are the main differences between the twist drill and the end mill cutting tools? 8. What are the different methods to fix the wp on the milling machine? 9. With the aid of net sketches, state the different milling operations on the vertical milling machine. 10. With aid of neat sketch, explain the milling parameters. 11. With aid of neat sketches, explain the drilling parameters.arrow_forward
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