The ball screw is generally used for the special support bearing of the screw. The contact angle is 60°. This bearing has large bearing capacity, low speed and high precision. The domestic manufacturers usually have: BS series (such as: BS3062TN1/P4), 7602 series. (such as: 760205TN1/P4), 7603 series (such as 760305TN1/P4), etc., the most common screw bearing of NSK in Japan is TAC series, corresponding to domestic BS series, (such as 30TAC62B corresponding to domestic BS3062), the bearings need to be matched during general installation. Use, the specific matching method should be determined according to the use of the machine tool
The ball screw pair is ideal for converting rotary motion into linear motion or converting linear motion into rotary motion. The ball screw pair consists of a screw, a nut, a reversing device and a ball. The function of the ball screw pair is to convert the rotary motion into a linear motion or to convert the torque into an axial repetitive force, which is both high-precision and reversible. And high efficiency features.
Introduction
The ball screw pair is ideal for converting rotary motion into linear motion or converting linear motion into rotary motion. The ball screw pair consists of a screw, a nut, a reversing device and a ball. The function of the ball screw pair is to convert the rotary motion into a linear motion or to convert the torque into an axial repetitive force, which is both high-precision and reversible. And high efficiency features.
Characteristics
The ball screw pair has the characteristics of high precision, reversibility and high efficiency. This is the further extension and development of the lead screw. The important significance of this development is to turn the trapezoidal screw sliding motion into a rolling motion. Due to its low frictional resistance, ball screw bearings are widely used in a variety of industrial equipment and precision instruments.
use
The ball screw pair offers a wide range of standardized products for a variety of applications. The circulation of the balls is a loop type, a circulator type, and an end cover type. The preloading method includes positioning preloading (double nut mode, position preloading mode) and constant pressure preloading. The appropriate type can be selected according to the purpose. The precision precision ball screw with high precision grinding (the accuracy is divided into 7 grades from CO-C10) and the cold-rolled ball screw bearing formed by high-precision cold rolling (accuracy is divided into 3 from C-C10) Levels, only a few can do it). In addition, in order to cope with the urgent need for delivery by the user, there are also finished products that have been machined to the shaft end, and semi-finished products and cold-rolled ball screw bearings that can be freely machined to the end of the shaft. As a peripheral component of this bearing, the screw support unit, the nut holder, the lock nut, and the like which are necessary for use have also been standardized, and are available for the user to select.
Based on the product technology accumulated over the years, the ball screw pair is managed with a strict quality assurance system from materials, heat treatment, manufacturing, inspection and shipment, so it has high reliability.
(1) Double push and one free mode? The fixed end of the screw is free. The fixed end bearing is subjected to both axial and radial forces. This type of support is used for short lead screws with small strokes.
(2) Double push and one support mode? One end of the lead screw is fixed at the other end. The fixed end bearing is subjected to both axial and radial forces. The bearing at the end is only subjected to radial forces and can be used for a small amount of axial floating to avoid or reduce the bending of the lead due to its own weight. At the same time, the hot deformation of the lead screw can be freely extended to one end.