PVP ball screw consists of screw, nut and ball. Its function is to transform rotary motion into linear motion, which is the further extension and development of ball screw. The significance of this development is to change the bearing from rolling motion to sliding motion. Due to its small friction resistance, ball screw is widely used in various industrial equipment and precision instruments.

滾珠絲桿是工具機(jī)和精 密機(jī)械上常使用的傳動(dòng)元件，其主要功能是將旋轉(zhuǎn)運(yùn)動(dòng)轉(zhuǎn)換成線性運(yùn)動(dòng)，或?qū)⑴ぞ剞D(zhuǎn)換成軸向反覆作用力，同時(shí)兼具高精度、可逆性和高 效率的特點(diǎn)。

Ball screw is often used in tool machines and precision machinery. Its main function is to convert rotary motion into linear motion or torque into axial repetitive force. At the same time, it has the characteristics of high precision, reversibility and high efficiency.

一、pvp滾珠絲桿的金屬返向器對(duì)比塑料返向器有以下幾點(diǎn)優(yōu)勢(shì)：

1、 Compared with plastic ball screw, metal ball screw has the following advantages

1、耐磨損，保證了滾珠絲桿的使用壽命和穩(wěn)定性。

1. Wear resistance ensures the service life and stability of the ball screw.

2、耐高溫，在高溫的工況環(huán)境下不變形。

2. High temperature resistance, no deformation in high temperature environment.

3、金屬返向器更為順暢的滾珠彎道設(shè)計(jì)使?jié)L珠絲桿的傳動(dòng)工作更加順滑自然。

3. The smoother design of the ball curve of the metal reverser makes the transmission of the ball screw more smooth and natural.

4、一般的螺母分兩次磨，我們的螺母一次成型，同心度更高，精 密度更高。

4. The general nut is grinded twice, our nut is molded once, with higher concentricity and precision.

二、滾珠絲桿的選定要領(lǐng)

2、 Selection of ball screw

選擇滾珠絲桿時(shí)，要調(diào)查清楚運(yùn)轉(zhuǎn)條件再?zèng)Q定設(shè)計(jì)。選擇的要素有負(fù)荷重量、衝程、力矩、定位精度、重覆定位精度、剛性、導(dǎo)程、螺帽孔徑等，各個(gè)要素之間都有關(guān)聯(lián)，其中一項(xiàng)要素改變就會(huì)引起其他要素的改變，必須注意各要素之間的均衡。

When selecting the ball screw, we should first investigate the operating conditions and then decide the design. The selected elements include load weight, stroke, torque, positioning accuracy, repeat positioning accuracy, rigidity, lead, nut hole diameter, etc. all the elements are related. The change of one element will cause the change of other elements, so we must pay attention to the balance among the elements.

1、潤(rùn)滑

1. Lubrication

使用滾珠絲桿時(shí)，必須要具有足夠的潤(rùn)滑，如果潤(rùn)滑不夠會(huì)發(fā)生與金屬接觸，導(dǎo)致摩擦與摩耗的增加，造成故障或是壽命縮短等。

When using the ball screw, it must have enough lubrication. If the lubrication is not enough, it will contact with the metal, resulting in the increase of friction and friction, resulting in failure or shortened service life.

2、偏荷重

2. Partial load

當(dāng)偏荷重現(xiàn)象發(fā)生時(shí)，將直接影響絲桿的壽命及噪音，且多隨著運(yùn)轉(zhuǎn)不順的手感，若絲桿空載時(shí)與組裝后順暢度不同，除了注意絲桿本身的精度外，大多是組合精度不良產(chǎn)生偏荷重現(xiàn)象。

When the phenomenon of partial load occurs, it will directly affect the life and noise of the screw rod, and with the operation of the handle is not smooth, if the smoothness of the screw rod is different from that after assembly, in addition to paying attention to the accuracy of the screw rod itself, most of them are poor combination accuracy, resulting in the phenomenon of partial load.