
Precision Machining Technology
3rd Edition
ISBN: 9781337795302
Author: Peter, Hoffman.
Publisher: Cengage Learning,
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 8.3, Problem 1RQ
Write the X- and Z-axis coordinates for the part show n. Use the diametral method in the X-axis.
Expert Solution & Answer

Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A very thin metallic sheet is placed between two wood plates of different thicknesses. Theplates are firmly pressed together and electricity is passed through the sheet. The exposed surfaces ofthe two plates lose heat to the ambient fluid by convection. Assume uniform heating at the interface.Neglect end effects and assume steady state.[a] Will the heat transfer through the two plates be the same? Explain.[b] Will the exposed surfaces be at the same temperature? Explain
Design consideration requires that the surface of a small electronic package be maintained at atemperature not to exceed 82 o C. Noise constraints rule out the use of fans. The power dissipated inthe package is 35 watts and the surface area is 520 cm2 . The ambient temperature and surroundingwalls are assumed to be at 24 o C. The heat transfer coefficient is estimated to be 9.2 W/m2- oC andsurface emissivity is 0.7. Will the package dissipate the required power without violating designconstraints?
Consider radiation from a small surface at 100 oC which is enclosed by a much larger surface at24 o C. Determine the percent increase in the radiation heat transfer if the temperature of the smallsurface is doubled.
Chapter 8 Solutions
Precision Machining Technology
Ch. 8.1 - What is an ATC?Ch. 8.1 - What is an MCU and what is its function?Ch. 8.1 - Briefly describe a ball screw and a linear guide.Ch. 8.1 - Explain the benefits of using the absolute...Ch. 8.1 - Explain the benefits of using the incremental...Ch. 8.1 - Which coordinate system uses an angle and a...Ch. 8.1 - What is the name for the type of motor used to...Ch. 8.1 - Supposing a programmer, using absolute mode,...Ch. 8.1 - What is a modal code?Ch. 8.1 - What is another name for the Cartesian coordinate...
Ch. 8.1 - List four G-codes and describe their functions. a....Ch. 8.1 - List four M-codes and describe their functions. a....Ch. 8.1 - What is the name of the character that ends each...Ch. 8.1 - Explain the purpose of the safe-start portion of a...Ch. 8.2 - Name the two primary machine axes on most CNC...Ch. 8.2 - Explain the difference between a turning center...Ch. 8.2 - List the three common types of live toolholders....Ch. 8.2 - Name three major collet styles used in...Ch. 8.2 - Name three types of workholding devices for...Ch. 8.2 - Name three major styles of turning machines....Ch. 8.2 - Explain why some workholding devices can be run at...Ch. 8.2 - Explain the difference between an OD grooving tool...Ch. 8.2 - When machining workpieces made from bar stock,...Ch. 8.2 - Describe how a sub-spindle can be used to increase...Ch. 8.2 - How does a Swiss turning center differ from a...Ch. 8.3 - Write the X- and Z-axis coordinates for the part...Ch. 8.3 - To perform a facing cut using a tool with a nose...Ch. 8.3 - Explain the difference between rigid tapping and...Ch. 8.3 - How must the feed rate for tapping using a...Ch. 8.3 - Describe what happens to a concave radius (fillet)...Ch. 8.3 - Describe what happens to an outside chamfer when...Ch. 8.3 - If a G1 code command is programmed partway through...Ch. 8.3 - List and briefly describe the two methods for...Ch. 8.3 - Explain in your own words the difference between...Ch. 8.3 - In your own words, describe a canned cycle.Ch. 8.3 - List two types of canned cycles besides roughing...Ch. 8.4 - What machine mode is generally used to manually...Ch. 8.4 - MDI stands for _________ ___________ ________.Ch. 8.4 - Which must be set first, the tool geometry offset...Ch. 8.4 - What is the process called where a program is sent...Ch. 8.4 - Explain the purpose of homing.Ch. 8.4 - What is the process called when a new program is...Ch. 8.4 - When setting up a machine to run a program that...Ch. 8.4 - What does MCS stand for?Ch. 8.4 - What is used to adjust the clamping pressure of...Ch. 8.4 - What does MCS stand for?Ch. 8.4 - What does WCS stand for?Ch. 8.4 - A workpiece offset is the distance from __________...Ch. 8.5 - Explain the difference between a machining center...Ch. 8.5 - Name the two major types of ATCs and briefly...Ch. 8.5 - What are the two basic types of tapping...Ch. 8.5 - What are the three most common styles of collets...Ch. 8.5 - What are the two basic types of tapping...Ch. 8.5 - Prob. 6RQCh. 8.5 - A programmable indexing fixture creates a fourth...Ch. 8.5 - A _______ ________ uses interchangeable tooling...Ch. 8.5 - Briefly describe a tombstone used for CNC...Ch. 8.5 - A custom ______ can be designed and built to hold...Ch. 8.5 - The combination of the machining operations...Ch. 8.6 - What are the three major axes used during CNC mill...Ch. 8.6 - What command would be given to turn on the spindle...Ch. 8.6 - What G-code designates IPM feed rate mode? IPR...Ch. 8.6 - What is the purpose of a clearance plane in CNC...Ch. 8.6 - What is the purpose of work coordinate systems?Ch. 8.6 - Briefly define linear interpolation.Ch. 8.6 - If during the last operation on a part, a G1 code...Ch. 8.6 - Briefly describe the use of I and J for the arc...Ch. 8.6 - Write two blocks of code that could be used to...Ch. 8.6 - Briefly explain the difference between rigid and...Ch. 8.6 - Define the initial plane for a canned drilling or...Ch. 8.6 - A G98 in a canned cycle sets the return point to...Ch. 8.6 - A _____ code is used to cancel a canned cycle.Ch. 8.6 - What two codes are used to activate automatic...Ch. 8.6 - What two codes are used to activate automatic...Ch. 8.6 - What code is used to cancel automatic cutter...Ch. 8.7 - Which must be set first, a work offset or a tool...Ch. 8.7 - What mode is used to manually enter programs into...Ch. 8.7 - What is the process called when a program is sent...Ch. 8.7 - Explain what may occur that makes it necessary to...Ch. 8.7 - Explain the purpose of homing.Ch. 8.7 - What is the process called when a new program is...Ch. 8.7 - What are two actions that can be taken during the...Ch. 8.7 - When automatic cutter radius compensation is used...Ch. 8.7 - Which machine mode allows short, temporary program...Ch. 8.7 - Which machine mode is used to run the machine...Ch. 8.7 - What are the two controls on the machine's control...Ch. 8.7 - What control panel feature can be used to slow a...Ch. 8.8 - Prob. 1RQCh. 8.8 - Prob. 2RQCh. 8.8 - What are the three primary steps in creating a CNC...Ch. 8.8 - Prob. 4RQCh. 8.8 - What is the definition of entity?Ch. 8.8 - Why should a toolpath be verified on the screen of...Ch. 8.8 - What is a post-processor used for?Ch. 8.8 - What is it called when mutiple touching entities...Ch. 8.8 - What type of cutting tool is usually used for...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- A small electronic package with a surface area of 820 cm2 is placed in a room where the airtemperature is 28 o C. The heat transfer coefficient is 7.3 W/m2 - o C. You are asked to determine if it isjustified to neglect heat loss from the package by radiation. Assume a uniform surface temperature of78 o C and surface emissivity of 0.65 Assume further that room’s walls and ceiling are at a uniformtemperature of 16 o C.arrow_forwardA hollow metal sphere of outer radius or = 2 cm is heated internally with a variable output electricheater. The sphere loses heat from its surface by convection and radiation. The heat transfercoefficient is 22 W/ m2 - o C and surface emissivity is 0.92. The ambient fluid temperature is 20 o C andthe surroundings temperature is 14 oC. Construct a graph of the surface temperature corresponding toheating rates ranging from zero to 100 watts. Assume steady state. Use a simplified model forradiation exchange based on a small gray surface enclosed by a much larger surface at 14 o C.arrow_forward2. A program to make the part depicted in Figure 26.A has been created, presented in figure 26.B, but some information still needs to be filled in. Compute the tool locations, depths, and other missing information to present a completed program. (Hint: You may have to look up geometry for the center drill and standard 0.5000 in twist drill to know the required depth to drill). Dashed line indicates - corner of original stock Intended toolpath-tangent - arc entry and exit sized to programmer's judgment 026022 (Slot and Drill Part) (Setup Instructions. (UNITS: Inches (WORKPIECE MAT'L: SAE 1020 STEEL (Workpiece: 3.25 x 2.00 x0.75 in. Plate (PRZ Location G54: ( XY 0.0 Upper Left of Fixture ( TOP OF PART 2-0 (Tool List: ) ( T04 T02 0.500 IN 4 FLUTE FLAT END MILL) #4 CENTER DRILL ' T02 0.500 TWIST DRILL N010 GOO G90 G17 G20 G49 G40 G80 G54 N020 M06 T02 (0.5 IN 4-FLUTE END MILL) R0.750 N030 S760 M03 G00 x N040 043 H02 2 Y (P1) (RAPID DOWN -TLO) P4 NO50 MOB (COOLANT ON) N060 G01 X R1.000 N070…arrow_forward
- 6–95. The reaction of the ballast on the railway tie can be assumed uniformly distributed over its length as shown. If the wood has an allowable bending stress of σallow=1.5 ksi, determine the required minimum thickness t of the rectangular cross section of the tie to the nearest 18 in. Please include all steps. Also if you can, please explain how you found Mmax using an equation rather than using just the moment diagram. Thank you!arrow_forward6–53. If the moment acting on the cross section is M=600 N⋅m, determine the resultant force the bending stress produces on the top board. Please explain each step. Please explain how you got the numbers and where you plugged them in to solve the problem. Thank you!arrow_forwardSolving coplanar forcesarrow_forward
- Complete the following problems. Show your work/calculations, save as.pdf and upload to the assignment in Blackboard. 1. What are the x and y dimensions for the center position of holes 1,2, and 3 in the part shown in Figure 26.2 (below)? 6.0000 7118 Zero reference point 1.0005 1.0000 1.252 Bore C' bore 1.250 6.0000 .7118 0.2180 deep (3 holes) 2.6563 1.9445 3.000 diam. slot 0.3000 deep. 0.3000 wide 2.6563 1.9445arrow_forwardComplete the following problems. Show your work/calculations, save as.pdf and upload to the assignment in Blackboard. missing information to present a completed program. (Hint: You may have to look up geometry for the center drill and standard 0.5000 in twist drill to know the required depth to drill). 1. What are the x and y dimensions for the center position of holes 1,2, and 3 in the part shown in Figure 26.2 (below)? 6.0000 Zero reference point 7118 1.0005 1.0000 1.252 Bore 6.0000 .7118 Cbore 0.2180 deep (3 holes) 2.6563 1.9445 Figure 26.2 026022 (8lot and Drill Part) (Setup Instructions--- (UNITS: Inches (WORKPIECE NAT'L SAE 1020 STEEL (Workpiece: 3.25 x 2.00 x0.75 in. Plate (PRZ Location 054: ' XY 0.0 - Upper Left of Fixture TOP OF PART 2-0 (Tool List ( T02 0.500 IN 4 FLUTE FLAT END MILL #4 CENTER DRILL Dashed line indicates- corner of original stock ( T04 T02 3.000 diam. slot 0.3000 deep. 0.3000 wide Intended toolpath-tangent- arc entry and exit sized to programmer's judgment…arrow_forwardA program to make the part depicted in Figure 26.A has been created, presented in figure 26.B, but some information still needs to be filled in. Compute the tool locations, depths, and other missing information to present a completed program. (Hint: You may have to look up geometry for the center drill and standard 0.5000 in twist drill to know the required depth to drill).arrow_forward
- We consider a laminar flow induced by an impulsively started infinite flat plate. The y-axis is normal to the plate. The x- and z-axes form a plane parallel to the plate. The plate is defined by y = 0. For time t <0, the plate and the flow are at rest. For t≥0, the velocity of the plate is parallel to the 2-coordinate; its value is constant and equal to uw. At infinity, the flow is at rest. The flow induced by the motion of the plate is independent of z. (a) From the continuity equation, show that v=0 everywhere in the flow and the resulting momentum equation is მu Ət Note that this equation has the form of a diffusion equation (the same form as the heat equation). (b) We introduce the new variables T, Y and U such that T=kt, Y=k/2y, U = u where k is an arbitrary constant. In the new system of variables, the solution is U(Y,T). The solution U(Y,T) is expressed by a function of Y and T and the solution u(y, t) is expressed by a function of y and t. Show that the functions are identical.…arrow_forwardPart A: Suppose you wanted to drill a 1.5 in diameter hole through a piece of 1020 cold-rolled steel that is 2 in thick, using an HSS twist drill. What values if feed and cutting speed will you specify, along with an appropriate allowance? Part B: How much time will be required to drill the hole in the previous problem using the HSS drill?arrow_forward1.1 m 1.3 m B 60-mm diameter Brass 40-mm diameter Aluminum PROBLEM 2.52 - A rod consisting of two cylindrical portions AB and BC is restrained at both ends. Portion AB is made of brass (E₁ = 105 GPa, α = 20.9×10°/°C) and portion BC is made of aluminum (Ę₁ =72 GPa, α = 23.9×10/°C). Knowing that the rod is initially unstressed, determine (a) the normal stresses induced in portions AB and BC by a temperature rise of 42°C, (b) the corresponding deflection of point B.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Precision Machining Technology (MindTap Course Li...Mechanical EngineeringISBN:9781285444543Author:Peter J. Hoffman, Eric S. Hopewell, Brian JanesPublisher:Cengage LearningInternational Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L

Precision Machining Technology (MindTap Course Li...
Mechanical Engineering
ISBN:9781285444543
Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher:Cengage Learning

International Edition---engineering Mechanics: St...
Mechanical Engineering
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:CENGAGE L
Introduction To Engineering Drawing; Author: EzEd Channel;https://www.youtube.com/watch?v=z4xZmBpXIzQ;License: Standard youtube license