Let me chat with you about the definition of up-and-down milling:
Climb milling: It means that the cutting speed direction of the tool is the same as the moving direction of the workpiece.
Up milling: It means that the direction of the cutting speed of the tool is opposite to the direction of movement of the workpiece.
At the beginning of down milling, the chip thickness is the maximum value, the cutting thickness is small, the chip deformation is small, and the cutting force is pressed against the workpiece.
In order to obtain good surface quality, we usually use climb milling. Because it has the advantages of small flank wear and smooth operation of the machine tool, it is suitable for processing high alloy steel under better cutting conditions.
Instructions for use:
It is not suitable to process workpieces with hard surfaces (such as casting surfaces), because at this time the cutting edge must pass through the hardened surface of the workpiece from the outside, resulting in strong wear. When there is a gap between the screw and the nut of the machine table, it will cause the machine table to move.
The chip thickness is 0 at the beginning of up-cut milling, and increases to the maximum value at the end of cutting. Polishing is involved in the milling process. Cutting force is away from the workpiece (tends to lift the workpiece).
In view of the side effects of this method, such as accelerated flank wear and reduced blade durability, case hardening of high-alloy steels during machining, and unsatisfactory surface quality, this method is rarely used.
Instructions for use: Ÿ The workpiece must be clamped completely, otherwise there is a danger of lifting the workbench.
