Linear motor instead of ball screw to become the mainstream, the linear motor is characterized by direct linear motion, and indirectly produce linear motion "rotary motor, rolling screw" compared to its many advantages, and before we share the advantages of linear motor.
Today we look at why the linear motor to replace the ball screw into the mainstream, from the surface, the linear motor can gradually replace the ball screw to become the mainstream of driving linear motion. But the fact is that after the widespread use of linear motor drives, some problems that did not concern the past began to emerge:
1. Linear motor power consumption, especially in the high load, high acceleration of the movement, the machine instantaneous current on the plant's power supply system to bring a heavy load;
2. High vibration, linear motor dynamic stiffness is extremely low, can not play the role of buffer damping, high-speed movement is likely to cause other parts of the machine resonance;
3 heat, fixed in the table at the bottom of the linear motor mover is a high fever component, the installation location is not conducive to natural cooling, the machine temperature control caused great challenges;
4 can not be self-locking, in order to ensure safe operation, linear motor-driven axis of motion, especially the vertical axis of motion, additional locking mechanism must be added to increase the complexity of the machine.
In the application of linear motor, in addition to discovering the above defects, people also saw the one-sidedness of its advantages. The main advantages of linear motors are high speed and high acceleration, but in the machining process, the acceleration time exceeds 10m / s2 auxiliary time savings for the entire processing time is not much work, only in a very short working time Processing, high acceleration only makes sense, that is, for the mold, blades and other complex single-piece machining, the advantages of linear motor is not obvious.
For these reasons, the choice of the development of linear motor machine tool companies are to avoid weaknesses approach, first, the linear motor used in mass production, positioning movement and direction of frequent changes in the occasion, such as auto parts processing machine tools, rapid prototyping machine and Semiconductor production machines, etc .; two is used for low load, the process of large occasions, such as electrical processing machine tools, water cutting machine, plasma cutting machine.
This article originates from Kunshan Tongmao Electronics Co., Ltd. (
www.tmmotion.com) original company, please indicate the source.
Linear motor