Safe use of ball screw pair
Lubrication, in order to make the ball screw pair fully function, it must be lubricated in its working state. There are two main ways of lubricating the threaded rod:
The amount of grease supplied is generally 1/3 of the internal space volume of the nut. The arc threaded rod and the ball screw pair have been filled with grease inside the nut when they leave the factory.
b. Lubricating oil
Lubricating oil with a kinematic viscosity of 28.5-74cst (400T). The amount of oil supplied varies depending on the conditions of use (addition suppression amount), etc.
Dustproof, the ball screw is the same as the rolling bearing. If dirt and foreign matter enter, it will quickly wear out and become the cause of damage. Therefore, when considering the entry of dirt and foreign matter (cutting chips), dust-proof devices (wrinkle protection cover, screw sheath, etc.) must be used to completely protect the screw shaft.
In addition, if there is no foreign matter, the arc threaded rod, but if there is floating and sinking, can add dust rings at both ends of the ball nut.
Use, the ball screw pair should pay attention to the following matters when using:
a. The ball nut should move within the effective stroke, and if necessary, configure a limit at both ends of the stroke to prevent the nut from detaching from the screw shaft and causing the ball to fall off.
b. The ball screw pair cannot be self-locking due to its high transmission efficiency. When it is used for vertical transmission, if the weight of the components is not balanced, it is necessary to prevent the reverse transmission due to the weight of the components after the transmission stops or the motor loses power.
c. The normal working environment temperature range of the ball screw pair is ±60℃.
1. First, there is a press, a flat shovel with a round opening, a dial indicator and a watch frame, a round mold on one side, and a flat shovel with a round opening must be in contact with the bottom of the trapezoidal screw. The outer circles of the diameters match each other, and are mainly used for manual straightening, while the tire with a circular shape on one side needs to match the outer circle of the trapezoidal screw, so it is mainly used for straightening by a press. .
2. If the lead screw is somewhat straightened, it is a manual straightening method, which is to place the lead screw on the U-shaped iron block, and place the open and rounded flat shovel on the lead screw. Orientation, use a sledgehammer to strike, and the same dial indicator to align, repeat several times.
3. In fact, it is not necessary to use any machine tool work surface to assist all planes of support. Because it is difficult to achieve the desired effect by using a lathe for straightening, the arc threaded rod is mainly due to the straightening of the lathe. If you need to use flame or hit, it will have a bad influence on the trapezoidal lead screw, and there will be centrifugal force in the process of rotation.