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Numerical control lathe cutting tool should be how to properly installed?

by:SNK     2020-08-22
Numerical control lathe cutting tool should be how to properly installed? Release date: 2017 09 - 19 clicks: 3610 times when using cemented carbide cutting operation, correct installation tool is very important. If a cutting edge and workpiece contact position is not correct, the cutting tool may collapse or damage to the blade artifacts, sometimes even damage the CNC lathe. Two of the most common problem is to cut off the tool is perpendicular to the workpiece or cutting edge relative to the workpiece installation too high or too low, the central axis of the knives' service life, chip control, and whether it can keep vertical and smooth cut off will produce great influence, will also result in finish machining of parts in surface with convex and concave surface. If these problems are very serious, cutting tool will fail. In order to ensure the tool is perpendicular to the workpiece, the operator shall comply with a simple installation process. Carefully clean first lock area and will cut off tools installed on the hexagonal turret. Then measured with an indicator on their trip length is 100 mm cutter deviation, the deviation shall not be more than 1 mm. Usually test for a vertical cutting tools are a method to examine the chip. If artifacts produced by chip with long filamentous flow to one side, it could be a tool installation is not correct. Another phenomenon is to cut off blade rounded corners in early wear and tear, this suggests that the side blade under more pressure than the other side. If the cutting tool performance in processing or production parts of quality change, please follow the installation steps of the previously mentioned. Sometimes tool a slight collision can also cause deviation. Therefore, as soon as possible after the installation check cutting tool cutting condition is a good way to do this can help identify and prevent serious tool failure. In the cutting tool installation, another major question to consider is the location of the cutting edge relative to the workpiece axis. Blade installation is incorrect will cause a series of problems, one of the most common is the difference in tool wear and sudden failure in advance, the side of the chip form, difference of roughness and vibration. Because sometimes it very difficult to find out the actual location of the cutting edge, so these problems will worsen. On the old manual and automatic machine, these phenomena is often occur. Manufacturers design for most of the carbide insert, when using, should be installed to slightly higher than the workpiece center axis. This position is beneficial to use welding chip breaker implement and ensure the blade clamping reliably on the tool holder. When the blade installation was slightly higher than the center, tangential force can effect on the larger blade area. This increases the strength of the cutting tool and the position of the blade firmly in the groove. In addition, when the Angle between the cutting edge and workpiece is determined, cemented carbide cutting blades are designed to maximize the strength and robustness. If the blade is higher than the center line too much, after the blade Angle will decrease. After the knife on the friction between the part and workpiece, so in the cutting zone will produce a lot of heat. In turn, this will cause the blade wear and cold work hardening of the workpiece in advance. This is the most common sign is, in the short term after cutting blade have excessive after surface wear. Below the center line of the blade will create more problems. When the blade below the centerline Angle will increase. This makes the small blade section will bear all the cutting force, so as to shorten the knives' service life and increase the likelihood of tool failure suddenly. Below the center line of the blade of another problem is that the blade is irregular deviation. As most of the cutting force is used for the tip, it tends to vibration and rebound, the irregular movement will affect the knives' service life, usually in the form of the front of a cutting edge chip breaker. It in parts of the tank bottom and sides of vibration marks and poor surface roughness. Use below the centerline of the blade is one of the most serious consequence is the blade pulled out. When the blade contact whole bar, the rotation of the parts will actually pull blade groove; Parts center of residual burrs pile up on the cutting edge, when parts continue to rotate, will pull blade groove. If the situation is not timely judge, cutter holder will be in the next parts machining damage, and damage may result in machine tools and machining parts. This means a waste of time. Even if the blade is not pull out of the cutter holder, through cutting edge at the top of the rotating burrs could also lead to damage of the cutting tool. For these reasons, the need to prevent cutting depth than the workpiece center part of the cutting tool. After in the center, the actual rotating in opposite directions, the cutting force is likely to pull blade cutter holder. At the same time, the rotation will be blade after friction surface, cause the blade wear ahead of time. Blade geometry size and clamp type for all affect the center high. Usually width is greater than zero. 5 mm blade, the following formula is very useful for the determination of its largest center high: high center = 0. 8毫米× Width + 0. 025mm。 When cutting processing, should remember that cutting blade is installed on the center high high or slightly higher than the center. Those using high speed steel cutting knife or similar tool operators and installation personnel often think these tools below center high work better. But for modern carbide blade, high work below the center will make it more difficult to cut off operation.
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