高精度設(shè)備一般是滾珠絲杠裝置，tbi滾珠絲桿具有靈敏度高、精度高等諸多優(yōu)點(diǎn)，已成為許多設(shè)備的。tbi滾珠絲桿在機(jī)器運(yùn)行時(shí)，通常配有預(yù)壓后間隙，但如果沒有在正確的時(shí)間安裝滾珠絲杠，則無法體現(xiàn)其高精度和長壽命。

High precision equipment is generally ball screw devices, and tbi ball screws have many advantages such as high sensitivity and precision, and have become the preferred choice for many devices. When the tbi ball screw is running on the machine, it is usually equipped with pre pressing to eliminate the clearance, but if the ball screw is not installed at the correct time, it cannot reflect its high precision and long service life.

滾珠絲桿存在斷裂三大難題

Three major problems of ball screw fracture

一、回流管凹陷或斷裂

1、 Recessed or broken return pipe

螺母的過動(dòng)或回油管的撞擊會(huì)導(dǎo)致回油管凹陷或斷裂，從而阻礙球的循環(huán)路徑，導(dǎo)致球的滑動(dòng)而不是正常滾動(dòng)，終導(dǎo)致回油管斷裂。

Excessive movement of the nut or impact of the return pipe can cause the return pipe to sink or break, hindering the circulation path of the ball and causing it to slide instead of rolling normally, ultimately leading to the return pipe breaking.

二、tbi滾珠絲桿肩部被折斷

2、 TBI ball screw shoulder broken

設(shè)計(jì)不當(dāng):螺桿肩部應(yīng)避免尖角設(shè)計(jì)，以降低局部應(yīng)力集中。

Improper design: The shoulder of the screw should avoid sharp angle design to reduce local stress concentration.

螺桿軸頸彎曲:鎖緊螺母的軸承面與v形齒軸垂直度差，或鎖緊螺母面在兩個(gè)對(duì)應(yīng)方向平行度差，會(huì)導(dǎo)致螺桿肩彎曲或開裂;因此，鎖緊螺母前后，螺桿肩的偏差不應(yīng)超過0.01mm。

Bending of screw shaft neck: The difference in perpendicularity between the bearing surface of the locking nut and the V-shaped gear shaft, or the difference in parallelism between the locking nut surface in two corresponding directions, can cause the screw shoulder to bend or crack; Therefore, the deviation of the screw shoulder before and after locking the nut should not exceed 0.01mm.

徑向力或重復(fù)應(yīng)力(脈動(dòng)應(yīng)力):安裝時(shí)由于偏心螺桿產(chǎn)生異常交變剪應(yīng)力和滾珠絲杠早期損壞。

Radial force or repetitive stress (pulsating stress): Abnormal alternating shear stress and early damage to the ball screw caused by eccentric screw during installation.

三、鋼球破碎

3、 Steel ball crushing

鋼球是常用的材料是鉻鉬鋼，tbi滾珠絲桿在有或沒有潤滑作用時(shí)溫升差異明顯，這種溫升可能會(huì)導(dǎo)致鋼球斷裂或損壞，從而造成螺母或螺珠槽的損壞。因此，在設(shè)計(jì)過程中必須考慮潤滑油的補(bǔ)充。如果不能使用自動(dòng)潤滑系統(tǒng)，則必須在維修手冊(cè)中包括潤滑油的補(bǔ)充計(jì)劃。

The most commonly used material for steel balls is chromium molybdenum steel. The temperature rise of tbi ball screws varies significantly with or without lubrication, and this temperature rise may cause the steel balls to break or be damaged, resulting in damage to nuts or ball grooves. Therefore, the supplementation of lubricating oil must be considered in the design process. If the automatic lubrication system cannot be used, a lubrication oil replenishment plan must be included in the maintenance manual.

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