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Everyone has a deep understanding of the benefits of using CNC machining centers to process workpieces. There is still a mysterious veil for the manipulation and programming of CNC machining centers. CNC machining includes: rib milling, tap machining, and button machining. Three methods:
Rib milling method of cnc machining center
Rib milling is the use of rib milling tools for the processing of large-hole ribs, and the processing of rib holes that are more difficult to machine. It has the following characteristics:
Rib milling is the use of rib milling tools for the processing of large-hole ribs, and the processing of rib holes that are more difficult to machine. It has the following characteristics:
1.cnc machining center. The tools are usually made of carbide materials, with high speed, high precision of milling ribs, and high machining efficiency;
2. The same pitch of cnc machining center, whether it is left-handed rib or right-handed rib, can use a tool, reducing the cost of the tool;
3. The rib milling method is especially suitable for the rib processing of stainless steel, copper and other difficult-to-process materials. It is easy to remove chips and cool, and can guarantee the quality and safety of the processing;
4. Without the front-end leader of the cnc machining center tool, it is more convenient to process blind holes with shorter ribbed holes or holes without undercuts.
Rib milling tools are divided into two types: machine-clamped cemented carbide blade milling cutters and integral cemented carbide milling cutters. The machine-clamped tool can process holes with a rib depth less than the length of the blade, and can also process holes with a rib depth greater than the length of the blade. Hole; and the integral carbide milling cutter is used to process holes with rib depth less than the length of the tool;
Note for rib milling CNC programming: avoid tool damage or machining errors.
1. After the rib bottom hole is processed first, use a drill to machine a small diameter hole, and use boring to process a larger hole to ensure the accuracy of the rib bottom hole;
2. The tool usually adopts a 1/2 circle arc path to stop cutting in and cutting out to ensure the rib shape, and the tool radius compensation value should be brought in at this time.
2. The tool usually adopts a 1/2 circle arc path to stop cutting in and cutting out to ensure the rib shape, and the tool radius compensation value should be brought in at this time.
Tap processing method of CNC machining center
It is suitable for rib holes with small diameters or low hole position accuracy requirements. As in ordinary environments, the diameter of the ribbed hole drill is close to the lower limit of the diameter of the ribbed hole, which can reduce the machining allowance of the tap and reduce the load of the tap. At the same time, the application life of the tap is improved.
It is suitable for rib holes with small diameters or low hole position accuracy requirements. As in ordinary environments, the diameter of the ribbed hole drill is close to the lower limit of the diameter of the ribbed hole, which can reduce the machining allowance of the tap and reduce the load of the tap. At the same time, the application life of the tap is improved.
Everyone should choose the suitable tap according to the processed data. The tap is compared with the milling cutter and the boring cutter;
Very sensitive to the processed data; taps are divided into through-hole taps and blind-hole taps. The front end of the through-hole tap is long and is the front chip. When the blind hole is processed, the processing depth of the rib cannot be guaranteed, and the front end of the blind hole is the leader Shorter, for rear chip removal, so pay attention to the difference between the two; when using flexible tapping chucks, pay attention to the diameter of the tap shank and the width of the square should be the same as that of the tapping chuck; for rigid tapping, the diameter of the shank of the tap should be the same. Should be the same as the diameter of the spring jacket.
The programming of the tap processing method is relatively simple, and they are all in a solid form. It is enough to increase the parameter value. It should be noted that the numerical control system is different, and the subroutine pattern is also different, and the representative meaning of the parameter value is different.
Three, cnc machining center pick and button processing method
Cnc machining center pick and button processing method is suitable for the processing of large rib holes on the box type machine, or adopt this method in the environment without taps and rib milling cutters. A rib turning tool is installed on the boring bar to stop boring ribs. . There are several precautions for implementing the pick-and-button processing method:
1. There must be a delay in starting the spindle to ensure that the spindle reaches the rated speed;
2. The sharpening of hand-grinding rib knives cannot be symmetrical, and the reverse retreat cannot be adopted. The spindle should be used to move the cutter radially, and then retreat the retreat knife;
3. The tool holder must be accurate and consistent with the position of the tool slot, otherwise the multi-tool holder cannot be used for machining, which will form a sign of chaotic buckling;
4. When picking the buckle, be careful not to pick it with a single knife, even if it is a very thin buckle, otherwise it will cause tooth loss, and the roughness of the outside will be poor. You should stop picking with multiple knives;
5. The pick-and-button processing method is only suitable for single-piece, small batch, extra-pitch ribs and environments where there is no response to the tool, and the processing efficiency is low.
