Tài liệu Cutting Tools P11a docx

... space created by the relief behind the cutting edge or margin of a reamer. Cutting Edge: The cutting edge is the leading edge of the land in the direction of rotation for cutting. Flutes: The flutes are ... 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 too...

Ngày tải lên: 25/12/2013, 23:17

... chipbreakers is followed by a cutting edge. The finishing teeth complete the job. Chipbreakers are vital on round broaching tools. Without the chipbreakers, the tools would machine ring-shaped ... 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 de...

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 ... break. They are 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 multih...

Ngày tải lên: 25/12/2013, 23:17

... also called Hot Hardness Toughness: Toughness of cutting tools is needed so that tools don’t chip or fracture, especially during interrupt- ed cutting operations. Wear Resistance: Wear resistance means ... Wear resistance means the attainment of acceptable tool life before tools need to be replaced. The materials from which cutting tools are made are all characteristically hard...

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

... insert, behind the nose. 4.5 Cutting Conditions After deciding on the machine tool and cutting tool, the following main cutting conditions have to be considered: • Cutting speed • Depth of cut • ... metal cutting. Except at the beginning and end of the cut, the forces on the cutting tool and the tool tip temperature are essentially constant. For the special case of facing, the vary...

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

... diagram Velocity 40° Cutting stroke 220° 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 ... single point tools and cut only in straight lines. They both make the same types of cuts. The shaper handles relatively small work. The planer handles w...

Ngày tải lên: 17/12/2013, 11:15

Ngày tải lên: 23/12/2013, 01:15