Basic Knowledge of Light Cutting Spiral Cutter Head
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Basic Knowledge of Light Cutting Spiral Cutter Head
Today, we will talk about the basic knowledge of a light-cutting spiral cutter head. Hope it could help to know more about it.
1. Light-cut spiral woodworking tool structure composition
As shown in the figure, it is a structural composition diagram of a light-cut spiral cutter head, including a spiral cutter body, spiral grooves, reversible knives, and countersunk screws.
Among them, the spiral cutter body is the base of the light cutting spiral cutter head, which ensures that the cutter still has good mechanical strength under high-speed rotation. In the case of continuous cutting by the tool, a large amount of sawdust will be formed, which can be discharged in time through the chip pocket to improve the heat dissipation performance and processing quality of the tool.
Compared with traditional welded cemented carbide blades, the cutting edges of woodworking throw-away spiral cutters are all machine-clamped. It avoids the change of internal structure caused by welding and reduces the cutting performance, and the tool adopts a number of discarded blades arranged in a spiral shape. When a cutting edge is chipped or blunt during processing and cannot continue to work, the operator can change the blade angle by himself and use another cutting edge of the blade to continue processing until all the cutting edges on the blade are scrapped. The adjustment is convenient, the service life is improved, and the investment cost is reduced to a greater extent.
The countersunk head screws are used to fasten the woodworking reversible blades to ensure that the blades will not deflect or fall off during processing.
- Main technical parameters of light-cut spiral woodworking tools
- Light cutting spiral woodworking tool cutting angle δ
As the cutting angle δ increases, the surface quality of the workpiece can be improved, and the cutting angle is proportional to the feed force, so the feed force increases when δ increases. Generally, δ is between 45 degree and 70 degree in manual mode, and between 80 degree and 90 degree when maneuvering.
- Light cut spiral woodworking tool clearance angle α
Generally, the clearance angle α of the tool tip is between 10 degree and 20 degree. When the cutting angle δ is constant, it is advantageous to increase the clearance angle within a certain range, but if it is increased too large, the rigidity of the blade will deteriorate and the cutting edge may be easily chipped and vibration.
- Light cutting spiral woodworking tool rake angle γ and wedge angle β
After the cutting angle δ and the relief angle α are determined, the rake angle γ and the wedge angle β are also determined: γ=90-δ; β=δ-α.
When processing different types of wood, different angle parameters should be selected.
- Machining of light-cut spiral woodworking tool body
- Assembly technical requirements for light-cut spiral woodworking tools
After assembling, the light cutting spiral cutter head has a radial run-out tolerance of 0.025mm, an axial straightness tolerance of 0.025mm, a division tolerance of two adjacent teeth of 0.05mm, and a positioning surface end face tolerance of 0.02mm.
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