Tài liệu Cutting Tools P10 pptx

... between the cutting depth and the size of the nose radius. If the cutting depth is smaller than the nose radius, the radial cutting forces will increase with increased cutting depth. If the cutting ... the machine at a cutting depth that is greater than the desired cutting depth compen- sates for the radial deflection. When cutting begins, the radial cutting force reduces th...

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

... 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

... 16 Grinding Wheels and Operations Metal Removal Cutting- Tool Materials Metal Removal Methods Machinability of Metals Single Point Machining Turning Tools and Operations Turning Methods and Machines Grooving ... are now used for grinding tough and very hard steels, cemented carbide, and alumi- num oxide cutting tools. The synthetic diamond crystals shown in Figure 16.3a can be manufac-...

Ngày tải lên: 25/12/2013, 23:17

... 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

... 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

... shown in Figure 9.12. Drill Chucks: Cutting tools with straight shanks are generally held in a drill chuck. The most common drill chuck uses a key to lock the cutting tool. Drill chucks, both with ... with key and keyless, are shown in Figures 9.13. Sleeves: Cutting tools with tapered shanks are available in many different sizes. When a cutting tool that has a smaller taper than t...

Ngày tải lên: 25/12/2013, 23:17