On the machine tool, there is a component made of thin and long metal rods. It is a surface with high finish, and some have threads. Generally, the thread on the machine tool is called the lead screw.
1. According to the national standard GB/T17587.3-1998 and its application examples, the ball screw (which has basically replaced the trapezoidal lead screw and has been commonly known as the lead screw) is used to convert the rotary motion into linear motion; Or convert the linear motion into the rotary motion of the actuator, and have the characteristics of high transmission efficiency and accurate positioning;
2. When the lead screw is used as the driving body, the nut will be converted into linear motion according to the lead of the corresponding specification with the rotation angle of the lead screw. The passive workpiece can be connected with the nut through the nut seat to achieve the corresponding linear motion.
3. Because there is no clearance between the ball screw and the screw nut, the precision of linear movement is high, especially in frequent commutation without clearance compensation. The friction between ball screw and screw nut is very small, and it is very easy to rotate.
4. When the ball screw is connected with the motor, a coupling must be installed in the middle to achieve flexible connection. The synchronous belt can be directly connected with the motor output shaft by the synchronous wheel.
5. According to the national standard GB/T17587.3-1998, the ball screw pair is divided into positioning ball screw pair (P) and driving ball screw pair (T). The accuracy level is divided into seven levels, namely, level 1, 2, 3, 4, 5, 7 and 10, with the highest accuracy. Lower in turn. Select high-quality lead screw, identify Tihao Machinery, professional quality assurance, because professional, so excellent!
6. The distance of the nut movement of the ball screw after one revolution is a pitch distance. If it is the distance of four (or five) spirals of the nut movement per revolution of the lead screw, it means that the lead screw is a four-wire (or five-wire) lead screw, commonly known as a four-head (or five-head) lead screw.
Generally, the small lead ball screw adopts single wire, and the medium, large or large lead adopts two or more wires. High-efficiency machining method of lead screw – whirlwind milling of lead screw High-efficiency machining of lead screw whirlwind milling is a high-speed thread milling device installed on the lathe and matched with the lathe. The whirlwind milling is installed on the middle carriage of the lathe. The lathe clamps the lead screw to complete the low-speed feed movement, and the whirlwind milling drives the carbide tool of the external rotary cutter head to rotate at high speed to complete the cutting movement. Thread processing method of milling thread from lead screw. Because of its high milling speed (up to 400m/min) and high processing efficiency, and the use of compressed air for chip removal and cooling, the chip splashes like a whirlwind in the process of processing, so it is named – lead screw whirlwind milling.
Post time: Mar-13-2023