What is a milling cutter?
A milling cutter is a rotary tool with one or more teeth for milling. During the work, each tooth cuts the remaining amount of the workpiece intermittently. Milling cutters are mainly used to machine planes, steps, grooves, forming surfaces and cutting workpieces on milling machines.
So how do you choose a milling cutter?
First, determine the primary skill parameters of the milling cutter:
The main parameters of the carpenter milling cutter: tool outer diameter, machining thickness, intermediate aperture
Other skill parameters: number of teeth, reverse bias, reverse speed, feed rate, clamping method, tooth data.
Second, choose the construction mode of the milling cutter According to the nature and requirements of the cutting object, from the two aspects of skills and economy, consider all the milling cutters, welding all milling cutters, assembling milling cutters and combined milling cutters.
Third, the choice of milling cutter reverse bias
The reverse deflection of the milling cutter is determined according to the reverse deflection of the machining machine spindle and the relative position of the cutter shaft and the feed workpiece. Regardless of the overall milling cutter, the milling cutter is still assembled, and the inclination of the cutting edge relative to the cutter radius is determined. Reverse bias.
Fourth, the choice of cutting tool cutting
The cutting amount of the milling cutter includes the cutting speed of the milling cutter, the feed rate of the workpiece and the milling depth. The cutting speed of the milling cutter depends on the milling cutter speed and the radius of the milling cutter. The feed rate of the workpiece depends on the quality of the surface to be machined. The roughness of the workpiece to be cut is very large depending on the amount of feed per tooth of the milling cutter during the cutting process. The feed per tooth is too large, the machining appearance is too rough, the feed per tooth is too small, and the machining appearance will be too small. The burnt scene is presented, so the feed per tooth of the milling cutter must be appropriate.
Fifth, the invariance of milling cutter operation
The invariance of the operation of the milling cutter is the basis for the machining accuracy of the tube and the quality of the processed surface. This includes two aspects: First, the milling cutter vibrates in the cutting process due to external force; Second, the milling cutter deforms under the effect of external force.
Sixth, the safety of milling cutter processing
The safety of milling cutters includes the reverse speed limit of the milling cutter, the thickness limit of the chip, the height limit of the profiled cutter and the thickness and extension limit of the assembly cutter blade.
Wood cutting is characterized by high-speed cutting. The cutting speed of the milling cutter is more than 3000 rpm. The high-speed cutting brings high productivity and bright appearance quality to wood cutting. Also, it brings a series of safety problems. Therefore, when the spindle speed of the milling machine reaches 9000 rpm, in addition to the shank milling cutter with a tool size less than 16 mm, the assembly milling cutter should be stopped, and the weld seam of the welding whole milling cutter should also be Conduct a rigorous inspection and reflection.
The thickness limit of the chip is a necessary method for the excessive feed of the tube milling cutter and causing severe overload of the milling cutter.
Regarding the forming cutter, the height value of the profile contour is intimately related to the clamping method of the milling cutter, the thickness of the cutting workpiece, and the diameter of the milling cutter. In the future, the thickness of the workpiece, the diameter of the milling cutter and the intermediate diameter are determined. The height of the milling cutter reflects the strength and rigidity of the milling cutter itself and the ability to accept the cutting resistance. Therefore, the height of the profile must be limited to ensure the safety of the milling cutter.
When designing a milling cutter body, it is necessary to think about the clamping problem of the blade. Whether it is a cylindrical body or a disk-shaped body, the blade clamping method must have a sufficient clamping force to counter the reversal. Centrifugal force.
