What is the most popular area between the lead scr

2022-08-10
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What is the difference between the lead screw of modern CNC machine tools and that of traditional machine tools

lead screw is the most commonly used transmission element in machinery and, and plays a great role in machine tool processing. Recently, I received a message asking about the difference between the plasticity of the screw and the plastic metal of the screw of traditional machine tools, also known as plasticity, for the total amount of plastic deformation it can withstand before fracture. Thank you for your message. Next, I will discuss this issue in detail

lead screw (sulfite) of modern CNC machine tools: barium sulfate, calcium sulfate, ammonium sulfate, calcium sulfite vs traditional machine tool lead screw

the difference between lead screw of modern CNC machine tools and traditional machine tool lead screw can be distinguished from three aspects: structure, accuracy and accuracy guarantee mechanism

the lead screw of CNC machine tools is mainly used. Structurally, different from other lead screws, there are many balls rolling between the lead screw shaft and the lead screw of the ball screw pair. On the whole, the ball screw has complex structure, high precision, high movement efficiency, but poor seismic resistance and high maintenance cost. Most of the traditional machine tool lead screws are trapezoidal lead screws. The trapezoidal screw adopts sliding motion, and the pitch is often inaccurate. The rotation angle and the straight moving distance of the nut will be nonlinear within a certain accuracy range. Therefore, the trapezoidal lead screw has the advantages of simple structure, poor accuracy, low movement efficiency, but good seismic resistance, and lower maintenance cost than the ball screw

in terms of accuracy, the gap between ball screw and nut used in modern CNC machine tools is very small, and the pitch accuracy is very high. There is a linear relationship between the rotation of the lead screw and the moving distance of the nut, so the machining accuracy is better. The gap between the ordinary lead screw and the nut used in the traditional machine tool is large, the screw pitch of the lead screw is inaccurate, and the rotation angle and the straight-line moving distance of the nut are nonlinear within a certain accuracy range, so the overall machining accuracy is poor

from the perspective of accuracy guarantee mechanism, modern times often use servo motor + ball screw + grating to ensure accuracy. Traditional machine tools rely on control accuracy

advantages of ball screw

the reason why ball screw is more and more widely used is not only the popularity of CNC machine tools, but also because of its own advantages. Compared with ordinary screw, ball screw has the following advantages

1. Shorter driving torque

pet material test vessel was successfully produced

due to the rolling motion of many balls between the screw shaft and the screw nut of the ball screw pair, higher motion efficiency can be obtained

2, higher accuracy

the particularity of ball screw structure, motion mode and accuracy guarantee mechanism makes it more accurate than ordinary screw

3. Micro feed may be

the lectures held at PPG booth and the product promotion materials we provide on site. Because the ball screw pair uses ball motion, the starting torque is very small, and there will be no crawling phenomenon such as sliding motion, which can ensure the realization of accurate micro feed

4, no side clearance, high rigidity

the ball screw pair can be pressurized, because the preloading can make the axial clearance reach a negative value, and then get a higher rigidity (by adding pressure to the ball in the ball screw, when it is actually used in mechanical devices, the rigidity of the screw mother part can be enhanced due to the repulsion of the ball)

5, high-speed feeding may be

ball screw can realize high-speed feeding (movement) because of its high motion efficiency and low heating

although the ball screw has obvious advantages, due to its poor seismic resistance, corresponding shockproof and shock absorption measures should be taken during installation to prolong the service life of the screw and reduce the maintenance cost. Do you understand the problem of machine tool screw? Interested machine tool friends are welcome to leave messages and continue to communicate

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