Cutting Tools Episode 2 Part 7 docx

... hard, sharp, and cool cutting abrasive. It is one of the newest manufactured abra- sives and 2 1 /2 times harder than alu- minum oxide. It can withstand tem- peratures up to 25 00 degrees Fahren- heit. ... 1000 (very fine). Grain sizes are broadly defined as coarse (6 to 24 ), me- dium (30 to 60), fine (70 to 180), and very fine (22 0 to 1000). Figure 16.4 shows a comparison of three...

Ngày tải lên: 21/07/2014, 15:20

... internal broaches. Keyway Broach: Almost all key- ways in machine tools and parts are cut by a keyway broach - a narrow, flat bar with cutting teeth spaced along one surface. Both external and internal keyways ... number of parts, all of the same diameter and keyway size, are to be machined, an internal keyway broach can be designed to fit into the hole to support the cutting teeth. Onl...

Ngày tải lên: 21/07/2014, 15:20

... .26 2 × 4 RPM = = = 3 82 IPM 30.5 RPM 3 82 apr = = = .080 in. apr .080 N 8 apt = = = .010 in. SFPM 380 .26 2 × d .26 2 × 6 RPM = = = 24 2 IPM=apt×N×RPM = .006×10 24 2=14.5 Chap. 12: Milling Cutters ... . 024 π apr = apt = .006π apt = .006π FIGURE 12. 17: Drawing of a milling cutter showing the difference between advance per revolution (apr) and advance per tooth (apt). SFPM 400 .26...

Ngày tải lên: 21/07/2014, 15:20

... Figure 18.11. 18.5 .2 Vertical Spindle Machines Vertical-spindle honing machines are used especially for larger, heavier work. These all have power stroking at speeds from 20 to 120 FPM. The length ... possible. It can re- move as little as 0.0001 inch of stock or as much as 0. 125 inch of stock. However, usually only 0.0 02 to 0. 020 inch stock is left on the diameter for honing. As show...

Ngày tải lên: 21/07/2014, 15:20

... cases. www.toolingandproduction.com Chapter 17/ Tooling & Production 5 Chap. 17: Grinding Methods and Machines tion is shown in Figure 17. 12 and centerless grinder is shown in Figure 17. 13. 17 .2. 4 Internal Grinding Internal ... is shown in Fig. 17. 17a and grinding of a milling cutter is shown in Fig. 17. 17b. Figure 17. 18 shows sharpening of a carbide milling cutter with a dia-...

Ngày tải lên: 21/07/2014, 15:20

... teeth cutting at one time varies from 2 to 10 or more. Saws may be of the continuous cutting (band or rotary) or reciprocating type. A typical sawing operation is shown in Figure 15.1. The cutting ... 2 Tooling & Production/April 20 02 www.toolingandproduction.com George Schneider, Jr. CMfgE Professor Emeritus Engineering ... called a saw blade. Sawing is normally used to sep...

Ngày tải lên: 21/07/2014, 15:20

... unbalanced parts which can- not be rotated at high speeds; complex surface shapes, eccentric parts and components with additional elements that protrude; log, unstable shafts or thin-walled parts. Chap. ... satisfactory means of producing complex contours as shown in Figure 13 . 27 . Slotting and Slitting Operations: Milling cutters of either the plain or side -cutting type are used for slot...

Ngày tải lên: 21/07/2014, 15:20

... con- FIGURE 11. 17: Combination drill and tap tools are used for one-pass drilling and tapping (Courtesy: Morse Cutting Tools) FIGURE 11.16: An automated multihold tapping operation on a round part. (Cour- tesy: ... tap wrench. (Courtesy: Morse Cutting Tools) Taps are used for threading a wide range of materials both ferrous and non-ferrous. All pipe taps are supplied with 2- 1 /2...

Ngày tải lên: 21/07/2014, 15:20

... the machine size. Cutting Tools: Cutting tools are the same as those used on the table- type machine. Work holding is also the same, and angle plates are fre- quently used. 10 .7 .2 Vertical Boring ... The ‘stan- dard’ 72 - inch runway can be made almost any length required for spe- cial jobs. Lengths of 20 feet are in use today. The height of the column, which is usually 60 to 72...

Ngày tải lên: 21/07/2014, 15:20

... diagram Velocity 40° Cutting stroke 22 0° 140° Return stroke 1.0 1.6 R e t u r n Velocity diagram Forward cutting speed Return speed (b) Velocity Return stroke (faster) Shaper ram Cutting stroke 4-way valve Pump Tank Motor Base Ram ... vertical height available is about 12 to 15 inches. 7 .2. 1 Drive Mechanisms Shapers are available with either mechanical or hydraulic drive mecha- n...

Ngày tải lên: 21/07/2014, 15:20