05 - Material Removal Processes-2

05 - Material Removal Processes-2 - CHAPTER 8...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 8 Material- Removal Processes: Cutting art Part-2 Manufacturing Processes Prof. Tugrul Ozel
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lathe Operations FIGURE 8.40 Various cutting operations that can be performed on a lathe. Manufacturing Processes Prof. Tugrul Ozel
Background image of page 2
Designations for a Right-Handed Cutting Tool FIGURE 8.41 (a) Designations and symbols for a right-hand cutting tool; olid high peed teel tools have a solid high-speed-steel tools have a similar designation. The designation “right hand” means that the tool travels from right to left, as shown in Fig. 8.19 ) Square insert in a right and (b) Square insert in a right-hand toolholder for a turning operation. A wide variety of toolholder is available for holding inserts at various angles. Thus, e angles shown in (a) can be achieved the angles shown in (a) can be achieved easily by selecting an appropriate insert and toolholder. Source : Kennametal, Inc. Manufacturing Processes Prof. Tugrul Ozel
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Turning Operation FIGURE 8.42 (a) Schematic illustration of a turning operation showing depth of cut, d , and feed, f . cutting speed is the surface speed of the workpiece at the tool tip. (b) Forces acting on a cutting tool in turning. F c is the cutting force; F is the thrust or feed force (in the direction of feed); and t F r is the radial force that tends to push the tool away from the workpiece being machined. Compare this figure with Fig. 8.11 for a two-dimensional cutting operation. Manufacturing Processes Prof. Tugrul Ozel
Background image of page 4
STRAIGHT TURNING - ACHINE PARAMETERS MACHINE PARAMETERS Spindle Speed (N) V N 12 = Cutting speed (V in ft/min) avg D π Workpiece diameter (D avg in inches) Nf v f = Feed Rate (v f ) Spindle speed (N) Selection of Cutting Speed (V) and Feed per Revolution (f) Feed per revolution (f) Vendor specific Workpiece material and hardness range utting tool material Manufacturing Processes Prof. Tugrul Ozel Cutting tool material
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Range of Cutting Speeds FIGURE 8.43 The range of applicable cutting speeds and fees for a variety of tool materials. Source : Valenite, Inc. Manufacturing Processes Prof. Tugrul Ozel
Background image of page 6
Cutting Speeds in Turning CUTTING SPEED WORKPIECE MATERIAL m/min ft/min Aluminum alloys n y 200-1000 0 00 650-3300 0 0 Cast iron, gray Copper alloys High-temperature alloys Steels Stainless steels e p nd r 60-900 50-700 20-400 50-500 50-300 0 40 200-3000 160-2300 65-1300 160-1600 160-1000 0 0 Thermoplastics and thermosets Titanium alloys Tungsten alloys 90-240 10-100 60-150 300-800 30-330 200-500 Note: (a) These speeds are for carbides and ceramic cutting tools. Speeds for high-speed steel tool are lower than indicated. The higher ranges are for coated carbides and cermets. Speeds for diamond tools are significantly higher than those indicated. (b) Depths of cut, d , are generally in the range of 0.5-12 mm (0.02-0.5 in.) (c) Feeds, f , are generally in the range of 0.15-1 mm/rev (0.006-0.040 in./rev). TABLE 8.8 Approximate range of recommended cutting speeds for turning operations.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/20/2011 for the course ENG 303 taught by Professor Any during the Fall '08 term at Rutgers.

Page1 / 54

05 - Material Removal Processes-2 - CHAPTER 8...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online