metal stainless aluminum brass stamping manufacturer

Shenzhen pride Industrial Co., Ltd.

Block D, Dianlian Science Park, Matian St., Guangming District, Shenzhen 518106, China

crush@pride-cnc.com

+8615629044483

Contact：Chloe

+86-917-3387002

Trapezoidal thread is generally used for transmission to transmit accurate movement and power. It has the characteristics of center diameter matching and accurate centering. Trapezoidal threaded workpieces are widely used in various machine tools. Compared with triangular threads, trapezoidal threads have larger pitch and tooth profile, and higher accuracy. The surface roughness values on both sides of the thread profile are smaller, which leads to the cutting depth, faster cutting, large cutting allowance, and cutting of trapezoidal threads. The resistance is large, so the turning of the trapezoidal thread is more difficult. 1 Trapezoidal thread turning method When turning trapezoidal threads, high-speed steel material tools are usually used for low-speed turning. There are generally four feed methods for low-speed turning trapezoidal threads: straight forward method, left and right cutting method, straight groove method and stepped groove method. Usually the straight forward method is only suitable for turning trapezoidal threads with a small pitch (P<4 mm), while the trapezoidal threads with a larger pitch (P>4 mm) are often cut by left and right cutting methods, straight grooves and stepped grooves. law. 1.1 When the thread is turned by the straight forward method, only the middle carriage is used for lateral (perpendicular to the guide rail direction) feed, and thread turning is completed in several strokes. This method can obtain a relatively correct tooth profile, and the motion trajectory is also very simple. However, because the three cutting edges of the tool participate in the cutting at the same time, the vibration is relatively large, the flank is easy to pull out burrs, it is not easy to obtain a better surface quality, and it is easy to produce The phenomenon of piercing, therefore, it is only suitable for turning trapezoidal threads with a small pitch. 1.2 Left-Right Cutting Method When turning the trapezoidal thread by the left-right cutting method, in addition to using the scale of the middle carriage to control the lateral feed of the turning tool, at the same time, the scale of the small carriage is used to control the left and right micro-feed of the turning tool until the tooth profile is completely cut . When threading with the left-right cutting method, since one of the two main cutting edges of the turning tool is performing single-sided cutting, the three-edge cutting at the same time is avoided, so the phenomenon of tool sticking is not easy to occur. In addition, when finishing turning, try to choose a low speed (v=4~7 m/min), and pour cutting fluid, generally you can get a good surface quality.

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