Precision Machining Technology
3rd Edition
ISBN: 9781337795302
Author: Peter, Hoffman.
Publisher: Cengage Learning,
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Textbook Question
Chapter 7.2, Problem 3RQ
What abrasive is used to grind nonferrous metals, cast iron, and stainless steel?
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Red hardness, and important property of many tool steals, is the ability of a tool steel to retain its mechanical and other desired properties at elevated temperatures. That is, a material which has a red hardness has a resistance to heat softening. True or false
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Main characteristic when cutting Cast Iron ISO K is:
K
Machining at higher speeds creates abrasive wear
Difficult chip control (segmented chips)
Extreme cutting forces and power required
Chapter 7 Solutions
Precision Machining Technology
Ch. 7.1 - What are three benefits of precision grinding?Ch. 7.1 - What is the major use of the surface grinder?Ch. 7.1 - What are the two spindle types used for surface...Ch. 7.1 - What are the two types of table movements used for...Ch. 7.1 - Label the parts of the surface grinder.Ch. 7.1 - What are three types of cylindrical grinders?Ch. 7.1 - Tool and cutter grinders can be used to _______...Ch. 7.2 - What wheel shapes are commonly used for surface...Ch. 7.2 - What abrasive is commonly used to grind steels?Ch. 7.2 - What abrasive is used to grind nonferrous metals,...
Ch. 7.2 - What does CBN stand for?Ch. 7.2 - What superabrasive is a good choice for grinding...Ch. 7.2 - The grade of a wheel describes its __________ on a...Ch. 7.2 - Prob. 7RQCh. 7.2 - Prob. 8RQCh. 7.2 - Generally, harder wheels should be used to grind...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V What is the...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V Which wheel...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V Which wheel...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V Which wheel...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V What type of...Ch. 7.3 - List five surface grinder safety guidelines.Ch. 7.3 - What should be done to every grinding wheel before...Ch. 7.3 - When using a magnetic workholding device, the work...Ch. 7.3 - When using a magnetic chuck to hold a workpiece...Ch. 7.3 - Describe the difference between wheel truing and...Ch. 7.3 - What tool is used to true and dress an aluminum...Ch. 7.3 - How is a CBN wheel trued and dressed?Ch. 7.3 - Depth-of-cut range for surface grinding is: a....Ch. 7.3 - What should be done to a magnetic chuck when it...Ch. 7.3 - What workholding device can extend the magnetic...Ch. 7.3 - What workholding device can be used when grinding...Ch. 7.3 - Briefly describe the method for grinding two...Ch. 7.3 - List three types of workpiece features that can be...Ch. 7.3 - List three possible solutions to eliminate bum...Ch. 7.3 - What can cause scratches on the surface of a...
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- QIB/ Complete ( any four) of the following: 1. .. has an advantage of improveing machinability 2. When the carbon atom diameter more than intersitial space.. ..occurs 3. Grey cast iron of 3% C, 3% Si , and 3% p has carbon equivelent of 4. Mg has low ductility because 5. ... element reduce the brittleness of steel ....... .........arrow_forwardQ1- Compare between the ferrous and non-ferrous metals in terms of the strength, hardness, weight, machinability and the cost? Q2- What are the different between the cast iron and the steel? Q3- explain the following points: 1-When the carbide increase, the strength of the material increase too. 2-Plain carbon steels are cheaper than the alloy steels. 3-The manufacturers prefer the Al more than Cu to produce the rips and doors. 4-Mg are almost used as an alloyarrow_forwardDefine trueing and creep feed grinding.arrow_forward
- Why should you avoid recutting or grinding parts whenever possible?arrow_forwardWhich type of feature doesn't belong to form tolerances? Circularity The profile of a surface Flatness Cilindricity Which option about chief elements in metal cutting is wrong? Feed s is the tool distance moved along the axis per revolution of the workarrow_forwardMain characteristic when cutting Steel ISO P is: O Machining at higher speeds creates abrasive wear O Low carbon steel is sticky and needs sharp cutting edges O Machining creates high cutting forces, built-up edge, heat and deformation hardeningarrow_forward
- What is the typical C content of the following mild steel tools? Saw blades and razors/Lemme en saagblaaie = ______________ % to __________________ % C.arrow_forwardAbrasive machining makes use of ______ to remove material.arrow_forwarda. If rough milling of mild steel is performed using High Speed Steel (HSS) side and face milling cutter of 100 mm diameter, what rpm should be used. b. If finish turning of a shaft is done to reduce its diameter from 24 mm to 20 mm using carbide tool, what rpm should be used. Metric Surface Speeds in m/min (Cutting Speed) Tool Material Aluminum Drilling Carbide 90 - 115 Milling - Rough Carbide Milling - Finish Carbide 120 - 240 Turning Carbide Rough Carbide Finish HSS HSS HSS 55 - 60 120 - 240 150 - 270 75 - 105 60 - 90 60 - 90 135 - 180 Brass 40 - 45 75 - 100 45 - 60 60 - 75 90 - 210 105 - 210 135 - 260 35 - 45 55 - 75 60 - 90 75 - 105 60 - 100 Cast Iron 12 - 18 15 - 25 25 - 30 60 - 90 75 - 135 Mild Steel 10 - 15 75 - 105 75 - 120 18 - 27 18 -3- 45 - 60 23 - 40 100 - 145 Stainless Steel 8 - 18 25 - 37 10 - 15 55 - 67 12 - 25 85 - 150arrow_forward
- 9-a- (iv) Which material is used make grinding wheel? Give reason?arrow_forwardWhat can happen if a grinding stone with a lower-rated RPM than the grinder is used?arrow_forward1. List the operations and the tools needed to make the following shape.2. Find the speed of rotation (RPM N) of each tool during roughing andfinishing.The material of the piece is Stainless Steel (C45) with CARBIDE TOOL.arrow_forward
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