The structure principle of the end mill sharpener

April 20,2021

End mills have many uses, surface milling of marine moteur propeller, some machines, such as pipeline metal detector for sauce, climatic chamber, and matt tiles slotting also requires a milling cutter, the smart chips of android tablet, power bank and bank card chips , etc. are also need end mills that actually play a big role in our lives. I think it is very necessary to have a simple preliminary understanding of the milling cutter grinder before understanding the end mill grinder.


milling cutter sharpener


The principle of milling cutter sharpener

Our usual milling cutter is a little bit more four-edged, showing a twisted state. During use, in addition to the wear of the end face of the cutting edge, the side of the milling cutter is also abraded, plus its material, It is usually made of materials such as alloys. Although the wear is relatively slow, there will always be wear.


A milling cutter generally takes three to five days to process, and this is basically calculated under this work system of eight hours and ten hours.


The sharpener usually repairs the milling cutter from three places, which is commonly referred to as sharpening. The first grinding wheel is firstly ground from the end face. There is also a limit for the short path. Basically, there are no more than five strengths, and these five are controlled by time. According to our experience value, it should be more than seven seconds. Zhong, after this grinding, take out the milling cutter and put it into the second grinding wheel. This grinding wheel is mainly used to grind two or four blades (referring to the opposite two of the four blades, because this grinding wheel is special , Just avoid the middle position, form a certain angle with the end face, and will not grind the one or three blades in the middle. This knife has a limit, and it can’t be moved again when it is ground to a certain depth. Well, the last process is the third grinding wheel. The three people directly grind one and three cutting edges. This is also a restricted position. You can no longer cut the knife when you reach a certain depth. At this time, take the knife off and observe At a glance, it's basically polished.



In fact, the types of sharpeners are far more than these, and there are many types, but there is only a difference in appearance. Essentially, the above three grinding wheels cannot be escaped. And many factories do not have their own sharpeners, but regularly Send this worn tool to a professional sharpening shop, commonly known as outsourcing sharpening.


The structure principle of the end mill sharpener

First, fill the end mill grinder with no less than 0.6 MPa compressed gas. At this time, the resistance of the main shaft is very small to ensure the accuracy of the main shaft and the smooth movement of the main shaft. Install a suitable 5C chuck to clamp the end mill to be ground, adjust the position so that the top is in the spiral groove at the end of the end mill, and then fix it, because it is equal to the center of the tool, so the end edge at this time In a horizontal state.


Gently push the spindle along the axial direction, and pay attention to always contact with the end mill. At this time, it will play a guiding role in the spiral groove of the end mill, and the spindle and the end mill will move in a spiral motion. This is exactly the grinding of the spiral edge. The desired movement trajectory. Adjust the inclination of the grinding wheel according to the back angle of the end mill, and start grinding, so that a spiral blade with a back angle can be ground. After sharpening a spiral blade, do not move the grinding head, put another blade on it, and grind all spiral blades in sequence. When the end edge of the keyway milling cutter is additionally ground, the spindle seat can be adjusted so that the end edge of the end mill faces the grinding wheel, which is completed by the linear movement of the worktable.


The 5C chuck has been widely used in many fields, and the upper standards are unified and interchangeable.


Large round hole in clamping range

The 5C chuck can hold up to 28mm, and the Morse taper hole 5C chuck can hold MS1~MS4 taper shank tools, which is very suitable for the clamping of end mills.


High precision

The general accuracy of 5C chuck is about 0.01mm, while the precision of precision 5C chuck can reach 0.005mm.


Easy to operate

The 5C chuck is a back-pull chuck. When in use, after inserting the tool, the tool can be clamped by tightening the pull rod. The operation is time-saving and labor-saving, and it is very simple.


Grinding head part

Any tool needs a relief angle. Generally, when processing harder materials, you can choose a smaller tool relief angle; when processing softer materials, you can choose a larger tool relief angle. The size of the back angle must be sharpened by a knife sharpener. Like a traditional tool grinder, the grinding head is not adjustable, and the position of the grinding wheel is fixed). Adjust the back angle to 3.188mm to grind the 12° tool back angle. It is very troublesome to operate. It is different from general tool grinders.


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