The advantage of end mill cutter

A series of high-performance cutting tools, mainly for steel, especially within the range of HRC40 ~ 55 hardened steel and pre-hardened steel, and cast iron, stainless steel and other materials, efficient processing. Compared with GM Series Universal end mill cutter, end mill cutter series mainly from the tool to improve the structure and strength of materials, tools, improving tool abnormal wear (brittle breakage) status, increase tool life, especially at high metal removal rate and cutting high hardness under the conditions of the material much better than utter.
Two quite different tool geometries, end mill cutter week blade width by grinding chip flutes formed, will have an edge on the edge strength; and OPEN the peripheral blade width Groove flank to control the chip flutes after grinding is relatively small, mainly through the peripheral cutting edge after grinding. From a performance point, CLOSE diamond core drill bit end mill cutter diameter can be controlled to adjust the direction of the tool chip flow.

How to extend the life of end mill cutter

When the tool life for priority consideration may be appropriate to reduce the cutting speed and feed rate; when the chips from the edge of a bad situation, may be appropriate to increase the cutting speed.

Climb helps prevent the use of end mill cutter damage, can improve tool life. But there are two points to note: ① as ordinary machining, should seek to eliminate the gap feed mechanism; ② When the workpiece surface residual casting, forging process to form an oxide film or other hardened layer, should adopt the milling.

The use of high-speed steel end mills require a more broad scope and use, even if slightly inappropriate choice of cutting conditions, not to be too much problem. The carbide end mills, while having good wear resistance at high cutting, but it's not as extensive use of high-speed steel end mills drill bit and cutting conditions must be in strict conformity with the requirements of the tool.

The use life of end mill cutter

In other parts of the mold cavity CNC milling, when the point of the concave portion is cut or deep cavities, end mills need to lengthen the amount of protrusion. If you use long-edge-type mills, due to the large deflection of the tool, the tool is easy to produce vibration and cause breakage. Therefore, in the process, if only near the ends of the tool cutting edge to abrasive cutting disc participate, it is best to choose a longer total length Duanren tool shank type end mill cutter. When using large-diameter end mill horizontal CNC machining the workpiece on the machine, the deformation due to the weight of the tool produced by larger, more attention should be very easy to end cutting edge problems. In case you must use the long blade-type milling end mill cutter, you need to significantly reduce the cutting speed and feed rate.

The choice depends primarily on the cutting speed is material workpiece; feed rate depends on the choice of material and milling end mill cutter is the diameter of the workpiece. Some foreign manufacturers end mill cutter drill bits cutting tool parameters with sample selection table for reference. But at the same time cutting parameters chosen by the machine tool systems affected the shape of the workpiece clamping methods and other factors should be adjusted cutting speed and feed rate according to the actual situation.

The problem of end mill bit when working

Since there is a slight clearance between the end mill bit and the holder, so in the process tool vibration phenomena may occur. End mill vibration causes uneven circumference edge of cut, and cut expansion than the original value increases, the impact of precision and tool life. However, cutting wheel when the machined groove width is too small, the tool may be purposefully vibration, to achieve the desired groove width by increasing the amount of cut expansion, but the maximum amplitude of the end mill should be limited to this case 0.02mm or less otherwise, can not be stable cutting. In the normal processing of neutral end mill cutter vibration as small as possible.

When the tool vibration, you should consider lowering the cutting speed and feed rate, as both are still large vibration is reduced by 40%, you should consider reducing the amount of cut.

Such as the processing system in the resonance, the reason may be too large cutting speed and feed rate cutting blade is small, due to less rigid tool system, workpiece clamping force is not enough and the shape of the workpiece or workpiece clamping methods and other factors, and you should be taken to adjust the cutting dosage, increase tool system stiffness, increase the feed rate and other measures.

The use of end mill bits

At the milling machining center for milling complex parts, CNC milling end mill cutters for use should pay attention to the following issues:

End mill machining centers are mostly used spring clips suit sandwiched way, when used in a cantilever state. In the milling process, sometimes may appear gradually extended from the end mill tool holder, or even fall, resulting in the phenomenon of the workpiece scrapped, the wood cutting tct saw blade reason is usually because the knife is sandwiched between the inner hole and the outer diameter of the shank end mills the existence of the film, resulting in insufficient clamping force due. End mills drill bit are usually coated with anti-rust oil factory, if you use a non-water-soluble cutting oil when cutting, will be attached to the tool holder bore mist layer film, when the toolholder shank and there are film, toolholder difficult to firmly grip the handle in neutral milling process is easy loose fall. So before the end mill setup, you should first milling toolholder shank and the hole cleaned with cleaning fluid, dry and end mill cutter then carry out clamping.

When the larger diameter end mills, even toolholder shank and very clean, or accidents that may occur off the knife, then should be used with Weldon shank notch and the corresponding side locking mode.

Full-function end mill cutter compensation system:

1. CNC lathe CNC lathe tool end mill cutters compensation tool position compensation, including compensation and tool radius compensation in two ways. T function is specified by the processing program, T *** X XX for the tool in the first two numbers, the latter two XX for the tool compensation number, such as T0202. If the tool compensation number is 00, then cutting wheel cancel the end mill cutters compensation. (1) The tool offset tool wear or reinstall the tool change tool position due to the establishment, after the implementation of the tool position compensation, the processing does not require re-establishment. Approach is to measure the position of each tool and enter into the specified memory, the program instruction execution tool compensation, the cutting disc actual position of the tool to replace the original position. If no tool compensation, tool move from 0:00 to 1:00, the corresponding block is N60G00C45X93T0200, if the tool compensation is X = 3, Z = 4, and stored in the corresponding offset memory after execution tool compensation, tool from 0:00 move to 2:00 instead of 1:00, the corresponding block is N60G00X45Z93T0202. (2) when the tool radius compensation preparation CNC lathe machining program is seen as a turning point tip (imaginary tool P point), but in fact, in order to improve tool life and reduce the surface roughness, tool nose radius is ground into small arcs (arc tip AB), which will have a shape error of the workpiece. On the other hand, the location of the tip arc shape of the workpiece machining tools will also have an impact, and these can be used to solve the tool radius compensation. The end mill cutter and location parameters tools called tip position, expressed by parameters 0-9, P point for theoretical tip point. (3) Each tool compensation parameters corresponding tool compensation number of tool offsets (X and Z values) and tool radius compensation (R and T) Common four parameters, prior to processing the input to the corresponding memory is displayed on the CRT . In the automatic execution, CNC system according to the memory of the X, Z, R, T values, the tool automatically corrects the position error and automatically nose radius compensation.

End mill cutter work principle

End mill machining the workpiece on the CNC machine tools, it is clear that the movement of the tool center rail gauge with the workpiece contour do not coincide, it is because the contour end mill cutter motion envelope is formed. End mill cutter center point of the tool is called (4,5 axis NC machine tool known as a bit vector), knife sites meter track movement, which represents the trajectory of the tool. NC machining, is prepared in accordance with the size of the workpiece contour program, or by the trajectory of the size of the knife programming sites, which should be handled according to specific circumstances. In the full-function CNC machine tools, CNC wood milling cutters compensation system, according to the dimensions of the workpiece contour programming, established after the execution tool compensation, the CNC system automatically calculates, knife sites automatically adjust to the tool trajectory. Workpiece dimensions directly machining programs, tool wear, replace the machining program unchanged, and therefore the use of simple and convenient. Economical CNC simple structure, low price, there is a certain amount of production enterprises have. In the economical CNC system, if no tool compensation function, can only knife sites trajectory size machining programs, which requires first calculate the trajectory of sites based on the size of the knife the size and contour tool diameter. Therefore computationally intensive, complex, and tool wear, replace the need to re-calculate the trajectory of the size of cutting blade sites, re-establishment of the machining program.