Do you know how to make the best selection of CNC solid carbide woodworking tools?

Why use solid carbide spiral tools? Because of the unique properties of solid carbide woodworking tools. The cutting edge quality of solid carbide spiral cutters is the best among all available design tools. In addition, solid carbide shaving cutters can produce excellent edge cutting effects at the highest feed rates of various shaving machines.

  • Straight knife:

It is designed with a straight blade and no spiral blade. Due to the large contact surface between the blade and the workpiece during cutting, there will be greater frictional resistance and the blade is easy to wear. Its service life is shorter than that of spiral cutters, and it is suitable for cutting softer materials.

  • Spiral knife:

The design of the spiral blade can reduce the resistance caused by contact with the workpiece during cutting. In addition to high-speed cutting, it can also improve processing efficiency. Compared with straight cutters, its service life is longer than straight cutters, and it is suitable for cutting harder materials.

  • Top spinner:

The so-called “up-turning knife” refers to the “right” turning cutting combined with the “right” spiral groove. The upper rotary cutter will discharge the wood chips spirally upwards during cutting, which is particularly useful in the situation of milling grooves or difficult chip removal. Under certain conditions, the upper rotary cutter may pull the workpiece up during cutting. Additional fixtures may be required or the depth of cut must be completed in stages.

When the upper rotary knife is used for penetrating cutting, the cutting effect at the bottom of the workpiece will be fine and smooth. When cutting certain materials, rough burrs are likely to appear on the top of the processed objects.

The upper rotary knife can be used for direct vertical downward feed or drilling, but the vertical feed is prone to chipping, so it is not recommended to use it. We suggest to take the slanted trajectory to feed. The slanted trajectory feed method is to gradually increase the axial depth of cut to the set axial depth of cut. The milling force is gradually increased, so the impact on the tool and the spindle is more than The vertical lower knife is small, which can obviously reduce the phenomenon of lower knife chipping.

  • Down-rotating knife:

The “down-rotating knife” refers to the “right” rotating cutting combined with the “left” spiral groove, which discharges the wood chips from the bottom of the workpiece. The down-spin cutting method can help fix the workpiece while cutting. The cutting result is opposite to that of the upper rotary knife, the top is fine and smooth, and the bottom has rough hairy edges.

Downward chip removal can sometimes cause blocking problems, especially in the case of concealed milling.

In use, the lower rotary knife tends to finish the cutting of the workpiece in advance, which can greatly improve the stability of the lower rotary knife during trimming processing. The downward rotary knife is not suitable for the method of vertical downward feed, which is easy to cause the problem of tool breakage or chip resistance.

  • Compound spiral knife:

The compound spiral knife is a combination of the upper rotary blade and the lower rotary blade on the same tool. The upper and lower blades cut the compressible workpiece at the same time to avoid the generation of chips or burrs on the top or bottom of the workpiece.

Compound spiral cutters are widely used for cutting double-sided laminated laminates (laminate), but they can also be used on natural wood with burrs.

  • End milling:

The cutting edge is a smooth design, and the cutting result is fine and smooth, which is suitable for all kinds of processing requiring surface fineness.

  • Rough milling:

The cutting edge is wave-shaped design, and there will be fine lines during machining, and the cutting result is rougher than that of end mills. It is mostly used for machining operations that do not emphasize fineness. Generally, there will be two machining operations. Rough milling cutters are not suitable for low feed rates.

  • Coarse and fine milling:

The blade is designed with a serrated shape, which is intended to cut the sawdust generated during cutting into smaller pieces. This can reduce energy consumption and tool swing during cutting, and is more conducive to the discharge of sawdust. Rough milling and fine processing can be completed at one time when the tool is not offset and oscillated. It is generally recommended to use this tool when cutting hardwood or high-density materials at high feed rates. It is a good compromise tool between end mills and rough mills.

Fineness: end milling>coarse and fine milling>rough milling

Chip breaking effect: coarse and fine milling>rough milling>end milling

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