Screw rod and screw rod are very similar, and even in some cases, they can be mixed, but screw rod and screw rod are exactly different. Screw rod is a kind of screw rod. Screw rod generally refers to the screw with relatively small pitch, and generally speaking, the lead or pitch of screw rod is relatively large.
There are great differences in the design and application of the two
1. The screw rod is used for transmission to convert rotary motion into linear motion
1) According to the national standard gb/t17587.3-1998 and its application examples, the ball screw (which has basically replaced the trapezoidal screw, commonly known as the screw) is used to convert rotary motion into linear motion; Or the actuator that converts linear motion into rotary motion, and has high transmission efficiency, accurate positioning, etc
2) When the ball screw is used as the driving body, the nut will be converted into linear motion according to the lead of the corresponding specification with the rotation angle of the screw. The passive workpiece can be connected with the nut through the nut seat, so as to realize the corresponding linear motion.
2. Screw
The screw works under high temperature, certain corrosion, strong wear and high torque. The outer surface of the screw is a cylinder with spiral groove or a cone with conical spiral groove. The screw pitch is generally large, which is mostly used in plastic molding equipment, such as plastic profile extruder, injection molding machine, etc.
