Wnmg / Dnmg Lathe Tool Inserts , Wear Resistant Tungsten Carbide Inserts

CNC Turning Inserts Machining Turnig Insert TNMG/CNMG/WNMG/DNMG

Describtion:

1. Insert shape

Turning inserts are manufactured in a variety of shapes, sizes and thicknesses. The shape can be round to maximize edge strength, diamond-shaped to allow a sharp point to cut fine features, square, or even octagonal to increase the number of separate edges that can be applied as one edge after another wears out.

C and W type turning inserts are often used for rough machining due to their larger point angle, which makes them more rigid. Inserts with a smaller point angle, such as D and V, are often used for finish machining. Although they have less strength, the smaller angle can reach more part details.

2. clearance

Most inserts have drafted faces on the walls. Clearance prevents the walls of the insert from rubbing against the part, which will give poor machining. However, a turning insert with a 0° clearance angle is mostly used for rough machining.

3. chipbreaker

A chip breaker is a feature in the face of the insert that disrupts the flow of chips such that they break into short segments, rather than forming a long, stringy chip.

Application:

For Roughing, use a tough coated insert grade with a large nose radius, heavy honed cutting edge and large chipbreaker. Cut at a low SFM with a large Depth of Cut (ap) and high Feed Rate per Rev. (fn)

For Universal, use a hard, tough & wear resistant coated insert grade with a medium nose radius, honed cutting edge and medium chipbreaker. Cut at a medium SFM with a medium Depth of Cut (ap) and medium Feed Rate per Rev. (fn)

For Finishing, use a hard & wear resistant coated insert grade with a small nose radius, sharp to light honed cutting edge and small chipbreaker. Cut at a high SFM with a medium Depth of Cut (ap) and medium Feed Rate per Rev. (fn)

Optimum: Insert Wear, decrease Spindle Speed (n) and/or increase Feed (fn) or change to a harder insert grade. Insert Chipping, increase Spindle Speed (n), decrease Feed (fn), and/or change to a heavier honed edge or change to a tougher insert grade.

Coolant: Use Coolant, if the insert grade allows, and always use high pressure coolant to remove the hot chips and heat from the insert to reduce thermal shock

1. Substrate - The alloy carbide's properties, grain size, and cobalt content.

2. Geometry - The physical characteristics of an insert that differentiates one shape from the next.

3. Tolerances - The allowed deviation of all insert dimensions.

4. Relief Angle - The angle measured from the vertical line perpendicular to the cutting edge of the insert and the cutting face of the insert.

5. Rake Angle - The angle formed on the insert from the top surface area and the bottom of the insert chip flow area when parallel to the floor. 6. Chipbreaker - The formed groove or recess along the cutting edge of the insert that breaks chips into small manageable lengths.

7. Edge Preperation - The process used to prepare the insert's edge cutting condition for specific application and material. Achieved by honing, chamfering, "T" land or any combination there of.

8. Coating - Thin layer of titanium nitrade on the surface of the insert that allows for greater cutting speeds, wear resistance and longer insert life.

9. Grade - A combination of substrate and coating that determines the hardness and toughness of the insert.

cnc turning tools inserts

hard turning inserts

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