ch23 turning
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Engineering Process 2 Mechanical Engineering University of GaziantepTRANSCRIPT
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Chapter 23Machining Processes Used to Produce
Round Shapes: Turning and Hole Making
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Lathe CuttingOperations
Figure 23.1 Miscellaneous cuttingoperations that can be performedon a lathe. Note that all parts arecircular – a property known asaxisymmetry. The tools used, theirshape, and the processingparameters are describedthroughout this chapter.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Characteristics of Machining Processes and TypicalDimensional Tolerances
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Lathe
Figure 23.2 General view of a typical lathe, showing various components.Source: Courtesy of Heidenreich & Harbeck.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Turning Operation
Figure 23.3 Schematic illustration of the basic turning operation, showing depth-of-cut, d; feed, f; and spindle rotational speed, N in rev/min. Cutting speed is the surfacespeed of the workpiece at the tool tip.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Designations for a Right-Hand Cutting Tool
Figure 23.4 Designations for a right-hand cutting tool. Right-hand means the tooltravels form right to left, as shown in Fig. 23.3.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
General Recommendations for Tool Angles inTurning
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Summary ofTurning
Parametersand Formulas
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Forces Acting on a Cutting Tool in Turning
Figure 23.5 Forces acting on a cuttin tool in turning, Fc is the cutting force,Ft is the thrust of feed force (in the direction of feed), and Fr is the radialforce that tends to push the tool away from the workpiece being machined.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Range of Applicable Cutting Speeds and Feeds for ToolMaterials
Figure 23.6 The range ofapplicable cutting speeds andfeeds for a variety of toolmaterials.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
General Recommendations for Turning Operations
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
General Recommendations for Turning Operations, con’t.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
General Recommendations for Turning Operations, con’t
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
General Recommendations for Cutting Fluids for Machining
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Typical Capacities and Maximum Workpiece Dimensionsfor Machine Tools
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Collets
Figure 23.7 (a) and (b) Schematic illustrations of a draw-in type collet. Theworkpiece is placed in the collet hole, and the conical surfaces of the collet areforced inwards by pulling it with a draw bar into the sleeve. (c) A push-out typecollet. (d) Workholding of a workpiece on a face plate.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Mandrels to Hold Workpieces for Turning
Figure 23.8 Various types of mandrels to hold workpieces for turning. These mandrelsusually are mounted between centers on a lathe. Note that in (a), both the cylindricaland the end faces of the workpiece can be machined, whereas in (b) and (c), only thecylindrical surfaces can be machined.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Turret Lathe
Figure 23.9 Schematic illustration of the components of a turret lathe.Note the two turrets: square and hexagonal (main).
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Numerical Control Lathe and Turret
Figure 23.10 (a) A computer numerical-control lathe. Note the two turrets onthis machine. These machines have higher power and spindle speed than otherlathes in order to take advantage of new cutting tools with enhanced properties.(b) A typical turret equipped with ten tools, some of which are powered.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Parts Made on CNC Lathes
Figure 23.11 Typical parts made on CNC lathes.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Example 23.3: Machining of Complex Shapes
Figure 23.12 Examples of more complexshapes that can be produced on a CNC lathe.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
TypicalProductionRates forVarious
MachiningOperations
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Range of SurfaceRoughnesses in
MachiningProcesses
Figure 23.13 The range ofsurface roughnesses obtainedin various machiningprocesses. Note the widerange within each group,especially in turning and boring.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Range ofDimensionalTolerances in
Machining as aFunction of
Workpiece Size
Figure 23.14 Range ofdimensional tolerances obtainedin various machining processesas a function of workpiece size.Note that there is an order osmagnitude difference betweensmall and large workpieces.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Troubleshooting Guide for Turning
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
CuttingScrew
Threads
Figure 23.15 (a) Cutting screw threads on a lathe with a single-point cutting tool. (b) Cutting screwthreads with a single-point tool in several passes, normally utilized for large threads. The small arrows inthe figures show the direction of the feed, and the broken lines show the position of the cutting tool as timeprogresses. Note that in radial cutting, the tool is fed directly into the workpiece. In flank cutting, the tool isfed inot the piece along the right face of the thread. In incremental cutting, the tool is first fed directly intothe piece at the center of the thread, then at its sides, and finally into the root. (c) A typical coated-carbideinsert in the process of cutting screw threads on a round shaft. (d) Cutting internal screw threads with acarbide insert. Source: (c): Courtesy of Iscar Metals Inc.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Chasers and Die for Thread Cutting
Figure 23.16 (a) Straight chasers for cutting threads on alathe. (b) Circular chasers. (c) A solid threading die.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Boring and Boring MillFigure 23.17 (a) Schematicillustration of a steel boring barwith a carbide insert. Note thepassageway in the bar for cuttingfluid application. (b) Schematicillustration of a boring bar withtungsten-alloy “inertia disks”sealed in the bar to counteractvibration and chatter duringboring. This system is effectivefor boring bar length-to-diameterratios of up to 6.
Figure 23.18 Schematic illustration of a verticalboring mill. Such a machine can accommodateworkpiece sizes as large as 2.5m (98 in.) indiameter.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Chisel-PointDrill and
CrankshaftDrill
Figure 23.19 Two common types of drills: (a) Chisel-point drill. The function of the pair of margins isto provide a bearing surface for the drill against walls of the hole as it penetrates into the workpiece.Drills with four margins (double-margin) are available for improved drill guidance and accuracy. Drillswith chip-breaker features also are available. (b) Crankshaft drills. These drills have good centeringability, and because chips tend to break up easily, these drills are suitable for producing deep holes.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
General Capabilities of Drilling
Figure 23.20 Various types of drillsand drilling and reaming operations.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Types of Drills
Figure 23.21 Various types of drills.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Gun Drill
Figure 23.22 (a) A gun drill showing various features.(b) Schematic illustration of the gun-drilling operation.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Trepanning
Figure 23.23 (a) Trepanning tool. (b) Trepanning with a drill-mounted single cutter.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
General Recommendations for Speeds and Feedsin Drilling
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Troubleshooting Guide for Drilling
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Vertical Drill Press and Radial Drilling Machine
Figure 23.24 (a) Schematic illustration of the components of a vertical drill press.(b) A radial drilling machine. Source: (b) Courtesy of Willis Machinery and Tools.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Three-Axis Computer Numerical-Control DrillingMachine
Figure 23.25 A three-axis computernumerical-control drilling machine. Theturret holds as many as eight differenttools, such as drills, taps, and reamers.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Helical Reamer and Inserted-Blade Adjustable Reamer
Figure 23.26 (a) Terminology for a helical reamer.(b) Inserted-blade adjustable reamer.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Tapping
Figure 23.27 (a) Terminology for a tap. (b) Tapping of steel nuts in production.
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Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.
Cervical Spine Implant
Figure 23.28 A cervical spine implant.