1. For key cutting of sharp tools with slender tool shanks, or cylindrical turning of slender shafts, the vertical machining center uses tools with a leading angle of 90° to help reduce vibration. Whether it is turning a slender shaft with an cylindrical turning tool or a key tool block hole of a slender tool holder, the radial cutting force generated by the tool with a 90° leading angle is always small. At the same time, the shaft generated by the blade edge of the vertical machining center Strong force.
2. For milling cutters with slender rods, vertical machining center round blade milling cutters are beneficial to vibration elimination. Milling cutters are the opposite of mixing cutters. The closer the main deflection angle is to 90°, the greater the radial cutting force, which means the greater the vibration of the tool holder. Therefore, Fast Silk Wire Cutting And Cnc Milling Steel Parts machines usually use 45° leading angle milling cutters for face milling of deep hole mold cavities. If the cutting depth is less than 1mm, round blade milling cutters or ball cutters are often used.
3. When a vertical machining center uses a slender rod end mill to mill a deep cavity, plunge milling is often used to reduce the cutting vibration of the CNC milling machine. Plunge milling means that the tool feeds axially like a drill. When milling a deep cavity, the overhang of the long rod is usually greater than 3 times the tool shank diameter. It is recommended to use the plunge milling method of axial feed. However, the edge of the end mill blade has a radial cutting edge of a certain width, and the tool supplier has technical data to prove the maximum cutting width of the tool during plunge milling.
4. In the milling of thin-walled workpieces, the main cause of vibration in the vertical machining center comes from the workpiece, which is called a box-type or bowl-type part. Since the vibration comes from the workpiece itself, when milling such parts, the main focus is to improve the clamping of the workpiece.
5. When boring inner holes, the smaller the blade edge angle, the better. In this way, the secondary main deflection angle is very large. The vibration contact area between the secondary cutting edge of the vertical machining center and the machined surface is small, and the vibration is difficult to turn into vibration. The chance of chip crushing on the secondary cutting edge is also small.
6. If the face milling cutter uses a sparse-tooth unequal spacing milling cutter, the milling vibration of the vertical machining center can be reduced. Here “teeth” refers to the blade. For face milling cutters with the same diameter (such as 100mm), if their three cutting factors are equal, then a cutterhead with 5 blades will definitely produce 50% less milling force than a cutterhead with 10 blades.
7. Use sharp blades to reduce the cutting force of the CNC milling machine. Vertical machining center machine inserts are divided into coated and uncoated blades. Uncoated blades are usually sharper than coated blades, because if the blade is to be coated, the edge must be passivated (ER treatment) , because the sharp edge will affect the bonding strength of the coating at the edge.
8. When the depth of cut is constant, using a small tool tip arc radius can undoubtedly reduce the cutting force, especially the radial cutting force, and the radial cutting force is the main cause of vibration of slender rod tools or Customized CNC Turning And Milling High-precision Mirror Body Shell Aluminum Parts. Vertical machining center whether it is impact cutting or milling. At the same cutting depth, the larger the tool tip arc radius, the greater the tendency of the slender tool holder to vibrate.
9. When the depth of cut is selectable, avoid making the depth of cut equal to the radius of the tool tip arc.
10. Use inserts with positive rake angle and large relief angle, and equipped with light chip breakers. Such inserts have a small cutting wedge angle during filing or milling, and the vertical machining center can certainly cut quickly.
11. Adjust the cutting parameters of the vertical machining center. Adjusting cutting parameters may only be effective when cutting vibration is not severe. The general adjustment methods are as follows: reduce the rotation speed of the tool or workpiece, reduce the depth of cut and increase the feed rate per revolution of the tool or per tooth of the milling cutter. If vibration occurs during the turning of internal threads in a vertical machining center, the number of steps required to complete thread turning can be reduced by 1 to 2 cuts.
12. Reasonable arrangement of the process path of the vertical machining center is very important for milling processing. Milling can be divided into down milling and up-cut milling. Traditional milling theory describes that using up-cut milling is beneficial to reducing milling vibration. In fact, it means that it is beneficial to suppress the vibration generated by the gap of the Precision Swiss Machining Tooth Drive Screw Rod. Most of today’s vertical machining centers are equipped with ball or roller screws, so up milling vibration reduction is of little significance. Whether it is down milling or up milling, as long as the direction of the milling force is consistent with the clamping direction of the workpiece, it will help eliminate the vibration of bent plate parts.