The traditional thread processing method mainly uses a thread turning tool to turn the thread or use taps, die manual tapping and buckle. With the development of CNC machining technology, especially the emergence of three-axis CNC machining system, the more advanced thread machining method – CNC milling of the thread can be realized. Compared with traditional thread processing, thread milling has great advantages in machining accuracy and machining efficiency, and is not limited by the thread structure and thread rotation during machining. For example, a thread milling cutter can process a variety of different directions. Internal and external threads. For the thread that does not allow the transition buckle or the undercut structure, the traditional turning method or taps and die are difficult to machine, but it is very easy to implement by CNC milling. In addition, the durability of the thread milling cutter is ten or even ten times that of the tap, and in the process of numerically milling the thread, the adjustment of the thread diameter size is extremely convenient, which is difficult to achieve by taps and die. Due to the many advantages of thread milling, the milling process has been widely used in large-scale thread production in developed countries.
Principles and advantages
Folding principle
Thread milling is done in a three-axis machine tool (machining center). When the X and Y axes go G03/G02 one turn, the Z axis synchronously moves the amount of one pitch P.
Folding advantages
★The cost is lower. Although the single thread milling cutter is more expensive than the wire tapping, the cost of a single threaded hole is higher than that of the wire tapping.
★High precision, thread milling cutter achieves precision with knife compensation, and customers can choose the thread precision they need.
★The finish is good, the teeth milled by the thread milling cutter are more beautiful than the silk.
★ Long life, the life of thread milling cutter is more than ten times or even dozens of times of silk attack, reducing the time for tool change and adjustment.
★Do not be afraid of breaking. After the wire breaks and breaks, the workpiece may be scrapped. The thread milling cutter is easy to take out even if it is broken manually, and the workpiece will not be scrapped.
★ The efficiency of thread milling cutters is much higher than that of wire tapping.
★Blind hole thread milling cutter can be milled to the bottom, and wire tapping is not possible.
★For some materials, thread milling cutters can be drilled. Milling teeth. Chamfering once formed, wire tapping is not possible.
★ A thread milling cutter can process internal and external threads with different directions of rotation, and the wire can’t be used.
★ Threaded holes of the same pitch and different sizes, the wire tapping needs to be replaced several times, and the thread milling cutter can be used universally.
★ Detecting the threaded hole for the first time, the thread milling cutter can be corrected by the tool compensation, the wire tapping is not possible, and the workpiece is only scrapped.
★ When machining large threaded holes, the wire tapping efficiency is low, and the thread milling cutter can be realized instantaneously.
★The thread milling cutter cuts into powdery short chips, and there is no possibility of wrapping the knife. The wire tapping is processed into spiral iron filings, which is easy to wrap the knife.
★ Thread milling cutters are not full-tooth contact cutting, and the machine load and cutting force are smaller than the wire tapping.
★Simple clamping, tapping requires flexible tapping shank, thread milling cutter can be used ER.HSK. Hydraulic. Hot rise and other shank.
★ A sleek thread milling cutter can be replaced with a metric system. American-made, English-made blades, etc., economical.
★When machining high-hardness threads, the wire tapping is severely worn and even impossible to machine. The thread milling cutter can be easily realized.
classification
Folding monolith
Suitable for medium and small diameter thread milling of steel, cast iron and non-ferrous materials, with smooth cutting and high durability. Threaded knives with different coatings for different materials.
Foldable replaceable blade
It consists of a milling cutter bar and a blade, which is characterized by easy manufacture of the blade and low price. Some threaded inserts can be cut on both sides, but the impact resistance is slightly worse than the overall thread milling cutter. Therefore, this tool is often recommended for processing aluminum alloy materials.
Folded welding
DIY thread milling cutter for machining deep holes or special workpieces and welding thread milling cutter heads to another tool. The knife has poor strength and flexibility, and its safety factor depends on the material of the workpiece and the technology of the thread cutter maker.
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