Chipping is a common form of early damage when a carbide single-edge milling cutter cuts steel and cast iron continuously or intermittently. It is a small gap on the cutting edge, a few small gaps on the cutting edge or a small piece of chipping. Generally, the notch size is equal to or slightly larger than the feed rate. The tool with micro chipping can continue cutting within the allowable wear limit. What are the reasons for chipping of cemented carbide single-edge milling cutters?
1. The performance factors of the cemented carbide single-edge milling cutter itself, the larger pcbn particles and the suitable bonding agent will have a high tensile strength and lightness in the overall sintering. This is also the common solid cemented carbide single-edge milling cutter in rough machining. Where the advantage lies. In addition to high-purity raw materials during the production process, CNC tool manufacturers also need CBN powder to undergo many procedures such as deoxidation, and to detect its bulk density. This is also the most uneven quality of cemented carbide single-edge milling cutters on the market. reason. The other is the synthesis process, which directly determines the shape and size of the polycrystalline grains of the cemented carbide single-edge milling cutter during synthesis. Good quality solid carbide single-edged milling cutters are fully capable of heavy-duty rough machining with interruptions.
2. The selection factors of cemented carbide single-edge milling cutters. Welded composite cemented carbide single-edge milling cutters generally have a cutting depth within 0.3mm or even less to ensure the safety of use. If there is strong interrupted cutting, any Welded composite cemented carbide single-edged milling cutters cannot guarantee that the tool will not collapse. At this time, only solid cemented carbide single-edged milling cutters can be selected.
3. Model selection factors for cemented carbide single-edge milling cutters. For cemented carbide single-edge milling cutters of the same performance grade, the impact resistance is in turn for round inserts, commonly used 25 degrees, 45 degrees, 75 degrees, 83 degrees, and 90 degrees. (The entering angle of the tool after the card is installed); In addition to the entering angle, the negative chamfer width, angle and cutting edge treatment of the carbide single-edge milling cutter itself affect the strength of the blade.
4. The influence of cutting parameters: In terms of cutting force, reducing the amount of cutting is a feasible way; if it is intermittent turning or machining of slender shafts, it is necessary to reduce the speed.
Post time: Jul-31-2021