A milling cutter is a rotating tool with one or more teeth for milling operations. The teeth intermittently cut away the workpiece in sequence during operation. Milling cutters are mainly used on milling machines for machining flat surfaces, steps, grooves, and shaped surfaces and cutting off workpieces. When choosing the milling cutter, the milling cutter body and the cutter holder should pay attention to whether the milling cutter is used on the CNC machining center or the general milling machine. The material and hardness of the milling cutter processing. The specifications of the milling cutter include edge length, full length, edge diameter, shank diameter, etc.
What milling cutter is generally used for milling ABS plastic
When milling ABS plastic, it is generally recommended to use carbide end mills with sharp cutting edges and large helix angles. This type of milling cutter is ideal for ABS plastics because it provides a smooth surface, reduces chatter, and improves chip evacuation.
Specifically, a two- or three-flute carbide end mill with a 30° to 45° helix angle and sharp radius is a good choice for milling ABS plastics. Using a sharp tool with an appropriate leading angle is important to avoid melting or burring the plastic material.
In addition, proper cutting speed, feed rate, and depth of cut must be used to prevent overheating and deformation of the plastic material during milling.
What tools are used to machine pu abs pp pe plastics?
Pu abs pp pe such plastic with what tool processing, with aluminum with a knife will be relatively good, pu abs pp pe such is a modified plastic: polyethylene. The use of general alloy milling cutters can be. Because the angle of the alloy milling cutter tool and the general angle of the tool is different, the plastic will stick to the knife, if you use the knife with aluminum can avoid this situation. In addition, the edge of the tool with aluminum is sharper. You can also use a single spiral, large front angle sharp tungsten steel uncoated milling cutter. It is better to use a left helix to facilitate chip removal. However, the softer the material, the easier it is to heat when processing, resulting in deformation. It must do a good job of cooling and can not be processed back and forth in the same place. Plastic parts are generally produced by the direct molding method, but some plastic parts are difficult to be directly formed or have high requirements for their accuracy. Cutting processing must be carried out. The cutting process of plastic parts generally uses equipment for processing metal. Because the performance of plastic and metal difference is large, and a wide variety of plastic, its different types of performance also have a large difference. Hence, the plastic parts of the cutting process have their characteristics. Another is to pay attention to the cutting speed when processing. Increasing the cutting speed can shorten the cutting time, improve productivity, and the cutting force will not increase. The cutting speed does not affect the surface roughness of plastic parts.
However, the increase in cutting speed will make the cutting temperature rise significantly, the plastic parts will produce thermal expansion, thermal deformation, and even discoloration, affecting the processing quality, and tool wear will intensify, durability reduced (cutting speed increased by 10%, tool durability will be shortened to 40% to 60% of the original), so that the tool change, grinding, tool adjustment and other auxiliary time increased. Still, the productivity has decreased, so to control the cutting speed. So in selecting a milling cutter, consider the matching of milling speed.
Milling ABS and other plastic products tools with tungsten steel or high-speed steel?
Usually, you will choose HSS, which has a sharper edge and helps to prevent burrs in plastic cutting. If you need high life, you can choose PCD. Although expensive, but expensive for what it is. Another thing to consider is that material tools can be sharply sharpened on that kind. Because here, you do not have to consider the tool’s heat resistance. Only sharpness is possible not to stick to the knife, to maintain the finish. The high speed of the milling cutter and the low speed of the feed can have the finish and reduce the tool change.
General CNC milling process of milling tool type selection
CNC milling machine used in the tool to be processed according to the material of the part, geometry, surface quality requirements, heat treatment state, cutting performance and machining allowance, etc., select the tool with good rigidity and high durability. The tools used in CNC milling are mainly flat-bottomed end mills, face mills, ball cutters, ring cutters, drum cutters, and tapered cutters.
The geometry of the part to be machined is the main basis for selecting the type of tool
1.When machining curved parts, to ensure that the tool’s cutting edge is tangential to the machining contour at the cutting point and to avoid interference between the cutting edge and the contour of the workpiece, the ball-head cutter is generally used. The two-flute cutter is used for roughing, and the four-flute cutter is used for semi-finishing and finishing, and the number of cutting edges is also related to the diameter of the cutter.
2.Milling larger planes to improve productivity and the processing surface roughness, the general use of insert inlay disc-shaped face milling cutter.
3.Milling small planes or step surfaces generally use a general-purpose milling cutter.
4.Milling keyway, to ensure the dimensional accuracy of the slot, the general use of a two-edged keyway milling cutter.
5.hole processing tools such as drills and boring tools can be used.
Conclusion
Whether in a CNC milling machine or a general milling machine, we have to consider the material and hardness of the milling tool and the specifications of the milling tool, such as the edge length, tool length, edge diameter, shank diameter, etc. High-speed steel milling cutters are usually suitable for general milling machines, while carbide tools are preferred for CNC machines. If you need a CNC milling machining service, contact ANPLLO for you.