What is the difference between trapezoidal screw and ball screw?

What is the difference between trapezoidal screw and ball screw?

Ball lead screw

Ball screw is the ideal product for converting rotary motion into linear motion, or converting linear motion into rotary motion.

Ball screw is composed of screw, nut and ball. Its function is to convert rotating motion into linear motion, which is the further extension and development of ball screws. The important significance of this development is to change the bearing from rolling action to sliding action. Because of its low friction resistance, ball screws are widely used in various industrial equipment and precision instruments.

Ball screw is the most commonly used transmission component of tool machine and precision machinery. Its main function is to convert rotary motion into linear motion, or to convert torque into axial repeated force. At the same time, it has the characteristics of high precision, reversibility and high efficiency.

Characteristics of ball screw:

1. Compared with the sliding screw pair, the driving torque is 1/3

Because there are many balls rolling between the screw shaft and the screw nut of the ball screw pair, high motion efficiency can be obtained. Compared with the past sliding lead screw pair, the driving torque is less than 1/3, that is, the power required to achieve the same motion result is 1/3 of the power required by using the rolling lead screw pair. It's very helpful in terms of saving electricity.

2, high precision guarantee

Ball screw pair is continuously produced with the world's highest level of mechanical equipment made in Japan. Especially in the grinding, assembly and inspection of the factory environment of each process, the temperature and humidity are strictly controlled. Due to the perfect quality management system, the accuracy is fully guaranteed.

3. Micro-feed is possible，Because ball screw pair uses ball movement, the starting torque is very small, there will be no crawling phenomenon like sliding movement, and accurate micro-feed can be ensured.

4, no side gap, high rigidity

The ball screw pair can be pressed, because the pressure can make the axial clearance reach negative value, and then get higher rigidity (by adding pressure to the ball in the ball screw, in the actual application of mechanical devices, due to the repulsive force of the ball can make the rigidity of the screw).

5. High speed feed is possible

Ball screw can realize high-speed feed (movement) because of its high movement efficiency and low heat.

Trapezoidal lead screw.

The working principle of trapezoidal screw:

1, according to the national standard GB/T17587.3-1998 and application examples, ball screw (currently has basically replaced the trapezoidal lead screw, has been commonly known as the lead screw) is used to rotate the motion

Convert to linear motion; Or the linear motion into the rotating motion of the actuator, and has the characteristics of high transmission efficiency, accurate positioning, etc.

2. When the lead screw is used as the active body, the nut will be transformed into a straight line movement along with the rotation Angle of the lead screw according to the corresponding specification. The passive workpiece can be connected through the nut holder and nut to realize the corresponding straight line movement.