The Influence of Cutting Insert Design on Chip Control in Turning

Cutting insert design has a significant role in chip control during turning. The chip control is the ability to control the formation and discharge of chips during the metal cutting process. The chip formation is the essential concept of how material is removed from the workpiece.

The chips can create problems in turning operations, such as machine downtime and tool damage. Excessive heat, forces, and wear on the cutting tool can be caused by the improper design of cutting inserts. Proper chip control can also lead to improved surface finish and longer tool life.

The cutting insert design has three primary parameters that determine chip control: geometry, material, and coating. Geometry has a vital role in chip VNMG Insert formation and chip control. The shape of the insert tool affects chip breaking, which is the process of breaking the continuous chip into small pieces.

The helix angle of the insert tool has a direct impact on chip control. The angle can be adjusted to improve chip breaking. If the helix angle is too low, the chip will not break, resulting in an unmanageable long chip. If the angle is too high, the chip will break too soon, which may cause chip disposal concerns and possible clogging of the coolant system.

The material of the cutting insert also affects chip control. The strength, toughness, and thermal conductivity of the insert material are critical factors. The insert material should be strong and tough enough to resist the forces involved in metal cutting. Thermal conductivity is important because heat produced Shoulder Milling Inserts during cutting is carried away from the cutting zone through the insert.

Finally, coatings on cutting inserts significantly impact the chip control. The coatings provide a protective layer on the tool, which resists wear and tear resulting from the cutting process. Coatings also improve the chip control by reducing friction between the workpiece and the tool. The coatings reduce the temperature of the tool as well, and in turn, the temperature of the chips.

In conclusion, cutting insert design is critical for chip control during turning. A properly designed cutting insert can significantly improve surface finish, prolong tool life, and reduce machine downtime. Geometry, material, and coatings are the primary parameters that determine the effectiveness of the cutting insert in chip control.

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