Tài liệu Cutting Tools P14 docx

... to support the cutting teeth. Only the cutting teeth extend beyond the hole diameter to cut the keyway. Bushings or horns are not required. Burnishers: Burnishers are broach- ing tools designed ... normal cutting speeds of 100 FPM. These machines, a major factor in the auto- motive industry for many years, turn out a great variety of cast iron parts. They use standard carbide cutting...

Ngày tải lên: 25/12/2013, 23:17

... fluted cutting tool to smooth, enlarge, or accurately size an existing hole. Reaming is performed using the same types of machines as drilling. A reamer is a rotary cutting tool with one or more cutting ... must never be turned backward or the cutting edges will be dulled. * Any burrs or nicks on the cutting edges must be removed with an oil- stone to prevent cutting oversize hole...

Ngày tải lên: 25/12/2013, 23:17

... spiral-fluted bottoming tap. (Courtesy: Morse Cutting Tools) FIGURE 11.13: Straight and spiral- fluted pipe taps and a T-handle tap wrench. (Courtesy: Morse Cutting Tools) Taps are used for threading a ... at the front end of each land of a chaser, tap, or die by cutting away and relieving the crest of the first few teeth to distribute the cutting ac- tion over several teeth. Cres...

Ngày tải lên: 25/12/2013, 23:17

... metals. Some diamond cutting tools are made of a diamond crystal compaction (many small crystals pressed together) bonded to a carbide base (Fig. 1.16). These dia- mond cutting tools should only ... Hardness and strength of the cutting tool must be maintained at elevated temperatures also called Hot Hardness Toughness: Toughness of cutting tools is needed so that tools don’t c...

Ngày tải lên: 17/12/2013, 11:15

... of the cutting tool, are dependent on the multi- tude of cutting conditions and especial- ly on the cutting speeds and cutting flu- ids. Aside from the sudden premature breakage of the cutting ... Single Point Cutting Tools The metal cutting tool separates chips from the workpiece in order to cut the part to the desired shape and size. There is a great variety of metal cuttin...

Ngày tải lên: 17/12/2013, 11:15

... careful selection of cutting geometry and speed. Positive rake tools are often preferred on these materials to minimize part deflection and to reduce cutting temperatures in the cutting zone. The ... when cutting cast iron. Tool life may be defined as the peri- od of time that the cutting tool performs efficiently. Many variables such as material to be machined, cutting tool mat...

Ngày tải lên: 17/12/2013, 11:15

... deciding on the machine tool and cutting tool, the following main cutting conditions have to be considered: • Cutting speed • Depth of cut • Feed rate The choice of these cutting condi- tions will affect ... that a cutting fluid offers is not worth the extra expense incurred, and in a growing number of applications, cutting fluids are simply unnecessary or downright detrimental. M...

Ngày tải lên: 17/12/2013, 11:15

... relatively unskilled person for mass producing machined parts. The cutting tools were preset, or “set up” by a skilled machinist, and usually several cutting tools were in operation at the same time, reducing ... cuts. • Combined cuts can be made; tools on the cross slide can be used at the same time that tools on the turret are cutting. • Rigidity in holding work and tools is...

Ngày tải lên: 17/12/2013, 11:15

... tipped cutting tools sim- ilar to those used on shapers. However, since planers make heavy cuts, their tools are much larger. Rake relief angles are similar to those used on lath- es for cutting ... fin- ishing. Cutting angles for tools depend on the tool used and the workpiece materi- al. They are similar to angles used on other single-point tools, but the end clearance does not...

Ngày tải lên: 17/12/2013, 11:15

Ngày tải lên: 23/12/2013, 01:15