Ball Bearing,Single Row Ball Bearing,Ceramic Ball Bearing,Double Row Ball Bearing Shanghai Yi Kai Cheng bearing Co., LTD , https://www.ykchbearing.com
Mitsubishi Materials Corporation's APX end mills are new products developed to meet these requirements. The APX end mill is a new generation of indexable multi-function end mills that have been redesigned with a cutting simulation technology.
Features of APX end mills (1) High rigidity and low cutting force In order to reduce the cutting force, various measures have been taken in the design of the APX end mill. Firstly, in order to improve the chip peeling performance, the rake face is designed to be convex, and the rake angle is very large. For example, when the tool diameter is φ25 mm, the radial rake angle is taken as the maximum value of +25°, and the axial rake angle is taken as the maximum 18°; Secondly, in order to improve the chip removal performance, the blade is designed as a secondary rake face, and the convex tooth reduces the contact area with the chip, thereby reducing the cutting force. This tool design uses cutting simulation technology to pre-calculate the cutting force and chip temperature during actual cutting. In addition, the flank face is pressed into a thread shape to improve its resistance to breakage. The advantage of this design is that it is less prone to chattering during cutting. Even when milling on low-rigidity machines such as the BT30, the APX end mill can fully perform its excellent performance.
Comparison of the power consumption of APX end mills and other company's latest tool varieties (SCM440, cutting speed 160m/min, cutting depth 6mm, cutting width 6mm, feed 0.1-0.2mm/tooth, dry-type milling) The results show that the APX end mill consumes the least power and has the highest cutting edge sharpness. The comparison of the anti-breaking performance shows that Mitsubishi's products have a special tooth-shaped design and are treated with a miracle coating, which still has good resistance to breakage in the case of low cutting force.
(2) Having the best three-dimensional curved cutting edge shape The main cutting edge of the insert has a convex three-dimensional curved shape, which can machine high-precision side wall surface and improve the processing quality of the part. This three-dimensional shape is designed by simulating and analyzing the direction of chip formation, etc., which allows the chips to be peeled off at the optimum time, so that the machined parts obtain an extremely good machined surface.
The measurement results of the deviation when cutting the sidewall surface show that when the cutting depth is 6mm, the deviation value of the side wall of the APX end mill is 21μm, and the machining deviation value of the same specification tool of other companies is larger than that of the APX end mill. If the APX end mill is used for finishing, the cutting load is smaller and the deviation value is even close to negligible level.
(3) Multi-function The APX end mill has the most outstanding features compared with Mitsubishi's previous products. The APX end mill can perform a variety of machining operations and complete a variety of 3D machining with a single tool. Especially when used in the field of blade machining of aircraft parts, it can also exert its unique cutting effect. In addition, in the design of the shank, the diameter of the shank is slightly smaller than the diameter of the shank, which is an offset structure, which is convenient for deep cavity machining.
(4) Excellent wear resistance of the blade material The APX end mill is equipped with two miracle coated blades, namely “VP15TF†and “VP20RTâ€. The former blade is available for sale, and the latter blade is intended to be launched in May 2005. market. "VP15TF" is a general-purpose blade with a wide adaptability; "VP20RT" is a special-purpose blade that is limited to stainless steel processing. When cutting high hardness material SKD11 (50HRC) (cutting conditions: cutting speed 80m/min, cutting depth 5mm, cutting width 1mm, feed rate 0.05mm/tooth), comparison of tool wear shows that VP15TF coated blade has very long The service life. After the cutting length of the APX end mill reaches 10m, the wear behind the tool is only 0.14mm, while the cutters of other companies under the same cutting conditions, the cutting length is below 5m, that is, the sharp wear occurs.
Example 1 of APX end mill cutting on BT30 and BT40 machining centers is processed on the BT30 vertical machining center. When the user uses the original tool, it generates a lot of noise due to vibration and the working environment is poor. APX is adopted. After the end mill is processed, the noise is greatly reduced and the tool life is extended by more than 2 times.
Example 2 shows that after the original tool is processed, large burrs appear, and it is extremely time-consuming to remove these burrs, and the processing cost is correspondingly improved. After using the APX end mill, the sharpness of the cutting edge is high and the burrs are less. The time of the burr is greatly shortened.
Example 3 is an example of dry machining. When the original tool is used, the cutting heat is very high, and the workpiece is often scrapped due to thermal deformation. After the APX end mill, the cutting heat is greatly reduced, and the deformation of the workpiece is effectively suppressed. Stable dry machining.
Example 4 is an example of high-efficiency groove machining on a high-rigidity machining center. The machine tool power is 5.5/3.7kW, the maximum speed is 8000r/min, the material to be processed is S55C, the cutting speed is 160m/min, and the feed rate is 0.25mm/tooth. The cutting depth is 6mm and the cutting width is 20mm. The APX end mill consumes less power, but the cutting efficiency is 143cc/min, and the quality of the machined surface is also very good.
In recent years, the composition of the production line has gradually been converted from a special machine tool to a small, flexible machining center, especially a new production line for auto parts, which has been upgraded. Small machined spindles have high spindle speeds and are relatively stiff compared to large machining centers. Therefore, the tools required are still capable of high-efficiency machining performance on low-rigidity machines. Users are eager to require tool manufacturers to develop cutting tools with low cutting force, versatility, high precision and high efficiency.