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Matters needing attention when milling with high hardness end mills
Most of the high-hardness end mills used in the machining center use a spring clip set-clamp method, which is in a cantilever state when used.
Release time:
2022-06-15
Most of the high-hardness end mills used in the machining center use a spring clip set-clamp method, which is in a cantilever state when used. During the milling process, sometimes the flat-bottom end mill may gradually protrude from the tool holder, or even fall completely, causing the workpiece to be scrapped. The reason is generally because the inner hole of the tool holder and the outer diameter of the end mill holder are different There is an oil film between, resulting in insufficient clamping force.
High-hardness end mills are usually coated with anti-rust oil when they leave the factory. If water-insoluble cutting oil is used for cutting, a misty oil film will also adhere to the inner hole of the tool holder. When there is an oil film on the tool holder and the tool holder, The tool holder is difficult to firmly clamp the tool holder, and the end mill is easy to loose and fall off during processing. Therefore, before the end mill is clamped, the shank of the end mill and the inner hole of the tool holder should be cleaned with cleaning fluid, and then dried before clamping. When the diameter of the end mill is large, even if the tool holder and the tool holder are clean, the tool drop accident may still occur. At this time, the tool holder with a flat notch and the corresponding side locking method should be selected.
Another problem that may occur after the high hardness end mill is clamped is that the end mill is broken at the tool holder port during processing. The reason is generally because the tool holder has been used for too long and the tool holder port has been worn into a cone. At this point, the tool holder should be replaced with a new one. End mills are divided into coarse teeth and fine teeth. Generally, straight shank end mills with three cutting edges are called coarse tooth milling cutters. Coarse tooth straight shank end mills are suitable for rough milling of general end face grooves and steps. processing.
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