Carbide endmill manufacturers teach you how to reduce wear .The damage of many knives is related to other factors. Mismatched fixtures and toolholders can also reduce cutting tool life. When the rigidity of the clamped workpiece is insufficient, it will move during cutting, which may cause the fracture of the cemented carbide substrate. Sometimes, small cracks appear along the cutting edge, and sometimes a piece falls off the carbide insert, making it impossible to continue cutting. Of course, this kind of blade fracture may also be caused by the hardness of the cemented carbide is too hard or the cutting load is too large. At this time, high-speed steel cutting tools can be considered for processing to reduce the occurrence of blade fracture.
However, high-speed steel knives cannot withstand the higher heat that carbide can. The choice of material must be determined on a case-by-case basis. During the use of alloy milling cutters, problems such as damage or wear will occur more or less, but sometimes it is unavoidable. However, we can do our best to minimize the loss. What are the ways to reduce wear? There is no doubt that heat is an important factor affecting tool life when milling nickel-based alloys. Even carbide tools can be damaged by excessive cutting heat. The resulting cutting heat is not only a problem when milling nickel alloys. Therefore, heat must be controlled when milling these alloys. In addition, it is important to know the calorific value generated when machining with various forms of tools (high-speed steel tools, carbide tools or ceramic tools). By using toolholders that improve tool loading eccentricity, such as hydraulic and thermal chucks, the cutting action can be more balanced and stable, reducing tool wear and improving surface quality. When choosing a knife holder, one principle to follow is that the shorter the knife holder, the better. These requirements for clamping tools and workpieces apply to milling any material, and when milling nickel-based alloys, it is also necessary to use advanced machining experience as much as possible.
The end mill dressing method is as follows:
1. Dressing end mill edge: Clamp the milling tool holder with the original tool holder R8 collet, and roll the end mill horizontally by 90 degrees with the attached tool. Lift the limit screw, adjust the knife holder 360 degrees, and reverse the knife holder to the position where the end edge can be sharpened. Then, according to the angle degree of the end edge, the inclination angle of the end edge relief angle is ground. Pay attention to feeding methods when grooming. After grinding, use the tool holder indexing device to rotate the tool 45 degrees (4 blades) or 90 degrees (2 blades) to grind the other blade.
2. Trim the side edge of the end mill: Replace the original tool holder table with a table for trimming the side edge of the end mill. Insert the R8 elastic sleeve into the taper hole of the milling cutter accessory table, insert the end mill with a suitable diameter into the R8 sleeve and fix it so that the helical end mill no longer rolls. Adjust the cutter of the end mill so that it is higher than the grinding wheel seat. According to the size of the back angle of the side edge of the milling cutter, roll the tool holder table 0-40 degrees to adjust the accessory table of the end mill to a suitable dressing angle. Use the guide adjustable support groove pin on the helical end mill trimming accessory to tighten the helical groove of the side edge of the end mill for guidance. Then freely rotate the push handle back and forth to trim the helical edge of the rear corner of the milling cutter. After the main back angle is finished, install the auxiliary back angle. Insert the guide adjustable support groove pin into the second slope helical groove, and install the same slope as the first slope.