What is the importance of chip thickness ratio?
The chip compression ratio can be used as one of the important machinability characteristics and it represents energy consumed in metal cutting on plastic deformation. The plastic deformation in machining stainless steel was found to be higher due to work hardening ability.
What is significance of chip reduction coefficient?
Abstract: Cutting force and chip reduction coefficient is the important index of machinability as it determines the power consumption and amount of energy invested in machining actions.
Why the value of the chip reduction coefficient is greater than one?
During cutting, the cutting edge of the tool is positioned a certain distance below the original work surface. This corresponds to the thickness of the chip prior to chip formation, to. As the chip is formed along the shear plane, its thickness increases to tc.
What is a cutting ratio?
[′kəd·iŋ ‚rā·shō] (engineering) As applied to metal cutting, the ratio of depth of cut to chip thickness for a given shear angle.
What is chip reduction coefficient briefly explain the effect of cutting variables on chip reduction coefficient?
The coefficient of chip contraction or chip reduction coefficient is a quantitative measurement of plastic deformation that occurred during the cutting process. or Chip reduction ratio. k=t2/t1 =l1/l2. The values of k may be high as 8, depending on the condition of the cutting. Contraction of chip increases when.
What are the important characteristics of materials used for cutting tools?
Cutting tool material
- hardness, hot hardness and pressure resistance.
- bending strength and toughness.
- inner bonding strength.
- wear resistance. oxidation resistance. small prosperity to diffusion and adhesion. abrasion resistance. edge strength.
Why is the shape of a cutting tool important?
Since a sharp edge is weak and fractures easily, an insert’s cutting edge is prepared with particular shapes to strengthen it.
What is chip reduction coefficient and cutting ratio?
The coefficient of chip contraction or chip reduction coefficient is a quantitative measurement of plastic deformation that occurred during the cutting process. or Chip reduction ratio. k=t2/t1 =l1/l2. The values of k may be high as 8, depending on the condition of the cutting.
What is the three most important characteristics of cutting tools?
Cutting tools should have high strength, hardness even at higher or lower temperatures. It should not change any of the material properties (ductility, hardness, strength) in the long rung. It should have high toughness and should have the ability to withstand shock and vibration. The tool should be cheap in price.
What is the function of chip breakers?
The function of a chip breaker is to improve chip control and to reduce cutting resistance. A better balance between the two will increase the machining performance.
What are the important physical and chemical properties of a cutting tool?
Cutting tool materials should have high strength and toughness to withstand cutting forces, shocks and vibrations, and prevent brittle fracture and chipping of the tool. (3) Heat resistance.
What is the purpose of cutting tools?
In the context of machining, a cutting tool or cutter is typically a hardened metal tool that is used to cut, shape, and remove material from a workpiece by means of machining tools as well as abrasive tools by way of shear deformation.
What is chip thickness ratio or cutting ratio?
The extent of this variance in dimension is denoted by the chip thickness ratio or cutting ratio. The chip thickness ratio or cutting ratio is defined as the ratio of chip thickness before cutting to the thickness after cutting. Other cutting variables such as feed rate, speed, depth.
What is longitudinal chip contraction and chip reduction?
The shortening of chip length is known as the longitudinal chip contraction. The inverse of chip thickness ratio is known as chip reduction coefficient. The coefficient of chip contraction or chip reduction coefficient is a quantitative measurement of plastic deformation occurred during the cutting process.
What are the factors affecting the thickness of a chip?
1) Type of material. 2) Type of cutting fluid. 3) Geometry of cutting tool. 4) Cutting variables such as feed rate, speed depth. Coefficient of chip contraction or Chip reduction Coefficient is invese of Chip Thickness ratio.
What is the coefficient of chip contraction coefficient?
The coefficient of chip contraction or chip reduction coefficient is a quantitative measurement of plastic deformation occurred during the cutting process. The value of k may be high as 8 depending on cutting condition.