What is the difference between ASA and ORS system?

What is the difference between ASA and ORS system?

ASA system—It utilizes three mutually perpendicular planes namely Machine longitudinal plane, Machine transverse plane and Reference plane. ORS system—It also utilizes three mutually perpendicular planes namely Reference plane, Cutting plane, and Orthogonal plane.

What is inclination angle in ORS?

Various features of the single point turning tool (SPTT) that are specified in ORS system are enlisted below. Inclination Angle (λ)—It is the angle of inclination of tool’s principal cutting edge from the reference plane (πR) and measured on cutting plane (πC).

What is the difference between rake angle and relief angle?

Rake angle is the angle between the rake surface and the reference plane as measured on another plane. Clearance angle is the angle between the flank surface and the cutting velocity as measured on another plane. Rake angle influences the extent of shear deformation of chip and also determines chip flow direction.

What is the purpose of back rake angle?

The back rake angle affects the chip thickness and the force of the cutting. To avoid the rubbing of the cutting tool on the workpiece the relief angle avoids rubbing of the tool on the workpiece. Similar relief and rake angles are also given to the auxiliary cutting edge.

What is the difference between orthogonal and oblique cutting?

The major difference between orthogonal and oblique cutting is that in orthogonal cutting, the cutting edge of the tool is perpendicular to the direction of motion. In oblique cutting the cutting edge makes an angle with the direction of motion.

What is ASA system?

The ASA physical status classification system is a system for assessing the fitness of patients before surgery. In 1963 the American Society of Anesthesiologists (ASA) adopted the five-category physical status classification system; a sixth category was later added.

How do you measure back rake angle?

Back Rake Angle It is the angle which measures the slope of the face of the tool from the nose toward the rear. If the slope is downward toward the nose, it is negative back rake angle. And if the slope is downward from the nose, it is positive back rake angle. If there is not any slope, back rake angle is zero.

What does the rake angle measure?

A rake angle is a measurement used to describe the slope and position of a cutting tool in relation to the object being cut. If the cutting edge of the tool is in front of the line, moving towards the line as it cuts, it is said to have a positive rake.

What are the different planes in ASA system and define them?

American Standards Association (ASA) system utilizes three mutually perpendicular planes for reference purpose namely Machine longitudinal plane, Machine transverse plane and Reference plane.

Why is rake angle important?

The rake angle (γ) is the angle between the rake surface and the reference plane (πR) or perpendicular surface of the workpiece. Rake angle is the most important factor while designing a cutting tool. It is provided so that chips from the workpiece can flow easily and also it provides a smoother machining operation.

What is rake angle in cutting tool?

Definition of ‘rake angle’ The rake angle is the angle of the surface of a cutting tool tip over which the removed chips flow. The rake angle is the angle between the front or cutting face of the tool and a line perpendicular to the workpiece.

What is the importance of rake angle in tool geometry?

Rake angle is cutting edge angle that has a large effect on cutting resistance, chip disposal, cutting temperature and tool life.

What is the difference between inclination angle and rake angle?

Inclination Angle (λ) —It is the angle of inclination of tool’s principal cutting edge from the reference plane (π R) and measured on cutting plane (π C ). Orthogonal Rake Angle (γO) —It is the angle of orientation of tool’s rake surface from the reference plane (π R) and measured on orthogonal plane (π O ).

What is the difference between orthogonal rake angle and clearance angle?

Orthogonal Rake Angle (γ O)—It is the angle of orientation of tool’s rake surface from the reference plane (π R) and measured on orthogonal plane (π O). Orthogonal Clearance Angle (α O)—It is the angle of orientation of tool’s principal flank surface from the cutting plane (π C) and measured on orthogonal plane (π O).

What is orthogonal rake system?

Orthogonal Rake System (ORS) utilizes three mutually perpendicular planes as reference for measuring various tool angles. These three planes are enlisted below.

What is the back rake of a tool?

Back Rake: The back rake is the inclination of the face toward or away from the end or the end cutting edge of the tool. When the inclination is away from the end cutting edge, as shown in figure below. The back rake is positive. If the inclination is downward toward the end cutting edge the back rake is negative.