What is the function of rake angle?

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

What is the value of rake angle?

Therefore, for the assessment of machining operation and to perform efficient machining, rake angle is one of the crucial parameters to take care of. Value of rake angle usually varies in between –15º and +15º; however, it may reach up to ±30º in some cases.

What is the function of the side and back rakes?

What is the function of the slide and back rakes? The side rake directs the chip flow away from the cut and also provides for a keen cutting edge. The back rake promotes smooth chip flow and good finishes.

What do you understand by a rake angle explain the importance of rack angle in a single point cutting tool?

This angle gives the slope of the face of the tool from the cutting edge. The side rack angle is negative if the slope is toward the cutting edge. And the side rack angle is positive if the slope is away from the cutting edge.

What is rake angle of cutting tool?

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 rake angle how it affects the formation of chips?

With the increased in positive rake angle, the cutting forces are decreased which means that less force/power is required. The results also suggest that the rake angles and the material property influence the flow of chip.

What is rake angle and clearance 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. A cutter may have positive, negative or zero rake angle. Typically its value ranges from -15° to +15°.

What is the optimum value of positive rake angle in degrees for maximum tool life?

15 degree
What is the optimum value of positive rake angle in degrees for maximum tool life? Explanation: At 15 degree chip removal rate and strength of tool are optimum and hence tool life will be maximum.

How rake angle affects the machinability?

Effect of Rake Angle on Machined Surface Finish The fact that a negative rake angle can reduce the surface roughness conforms to the long-held notion that the compressive stresses induced by a negative rake angle can weaken the breaking of the material, resulting in improved surface qualities.

How does rake angle effect shear angle?

Value: The Merchant equation defines the general relationship between rake angle, tool-chip friction, and shear plane angle. Conclusions: (1) rake angle increases, shear angle increases; friction decreases, shear angle increases.

How does the rake angle on a tool affect the power used?

Positive rake angles generally: Make the tool more sharp and pointed. This reduces the strength of the tool, as the small included angle in the tip may cause it to chip away. Reduce cutting forces and power requirements.

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