What are the principles of CNC precision machining of threads

  • In the CNC precision machining of threads, the machining method is a method of plastically deforming metal through pressure machining to form various cylindrical or conical threads. Since the fibers of the workpiece material will not be cut after rolling, the mechanical and physical properties of the finished product are better than cutting. The rolling processing productivity is high, metal materials can be saved, and the tool durability is high, so it is suitable for mass production. There are two methods: thread rolling and thread rolling.


During thread rolling, the workpiece is placed between the fixed thread rolling plate (fixed plate) and the movable thread rolling plate (moving plate). There are inclined grooves on the plane of the two threaded plates, and the cross-sectional shape of the two threaded plates is consistent with the tooth profile to be threaded. When the movable screw plate moves, the maximum diameter of the screw thread extruded on the surface of the workpiece is 25mm, the accuracy can reach level 5, and the surface roughness R value is 1.6~0.8μm.

When CNC lathes are precisely processed on the outer circumference of the threaded roller, the thread is exactly the same as the thread of the workpiece, but the direction of rotation is opposite. When rolling, the workpiece is placed between two rolling rollers. When the two rollers rotate in the same direction and at the same speed, the workpiece rotates. At the same time, one needle roller feeds radially to the other needle, thereby gradually extruding the linear shape.

The diameter range of the threaded workpiece precision processed by the CNC lathe is 0.3~120mm, and the surface roughness R value is 0.8~0.2μm. The productivity of thread rolling is lower than that of thread rolling, and it can be used for rolling screws, taps, etc. Using three or two rollers and moving the workpiece axially, the screw can be rolled.

Dongguan PTJ Precision Machinery Parts Co., Ltd. focuses on: CNC finishing supporting services for automation, aviation, basic scientific research, optical fiber, communications, semiconductors, electronics, medical equipment, auto parts suspension and other equipment accessories.
Processed materials: aluminum alloy, stainless steel, magnesium alloy, titanium alloy, nickel-based alloy (invar alloy/Invar alloy, kovar alloy/Kova alloy), high temperature alloy, tungsten copper alloy, engineering plastics And other special difficult-to-process materials.
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