The editor will explain the selection of ball screws for you: When we choose guide rails for our machines, we must choose the type that is suitable for mechanical operation! Otherwise, it is easy to cause abnormal mechanical operation, thereby reducing production. The ball screw is an ideal product that converts rotary motion into linear motion, or converts linear motion into rotary motion. Ball screw is a commonly used transmission component in tool machinery and precision machinery. Its main function is to convert rotational motion into linear motion or torque into axial repetitive force, while also possessing the characteristics of high precision, reversibility, and A-rate. Next, we will learn how to choose the type of guide rail.
We can learn from the following nine points:
Determine the diameter through the load. The output torque is included in the motor performance parameters. If the reducer is also included (considering efficiency), calculate how much thrust is required under actual working conditions. The ball screw sample (according to the manufacturer's requirements) has load parameters (i.e. thrust parameters, usually marked as dynamic load and static load, the former can be selected).
Select the installation mode (end). This installation can be self-designed or easily purchased, with a standard mounting base available as an option. When designing, attention should be paid to the stress state of the bearing itself. Bearing A should choose the 7000 or 3000 series, because the operation of the screw is mainly avoided by axial and radial forces.
Consider guiding components and installation capabilities. It is recommended to use a guide element that combines ball linear guides with ball screws. Of course, the matching of linear axis and linear bearing is a relatively economical choice.
Draw a ball screw diagram based on the above conditions (mainly the end installation dimensions, which should be detailed to provide shape, position dimensions, and tolerances).
5. Determine the linear velocity and rotational velocity of the ball screw. Determine the output speed of the motor, consider the linear speed of A that you need, and multiply the motor speed (if the reducer is divided by the reduction ratio) by the value of the screw to obtain the linear speed, which is greater than the required value.
6. Determine the length of the ball screw according to actual needs (total length=working stroke+nut length+safety margin+installation length+connection length+margin). If protection is added, such as a sheath, the expansion rate of the sheath needs to be considered (usually
1: 8. The elongation of sheath A is divided by 8. TBI ball screw is an ideal product that converts rotary motion into linear motion, or converts linear motion into rotary motion.
7. Determine the shape of the ball screw nut based on the installation conditions and size structure (nuts have many structures, and the size of different nuts may vary slightly depending on the situation. It is recommended not to choose too special to avoid repairing or replacing doors with defects A). TBI ball screw is an ideal product that converts rotary motion into linear motion, or converts linear motion into rotary motion.
Inquire about the price, payment terms, and delivery time of the selected product manufacturer. Designers do not consider procurement to be a problem. In fact, many manufacturers (importing domestic samples) do not produce or accept small orders for the models on the product samples. Printing may indicate that I am a large factory that can do anything. Don't wait until you have chosen the blueprint, other parts have already been made to fit this model. When you go shopping, people tell you that the delivery date for this model is 3 or 4 months.
9. Determine the accuracy of the ball screw according to actual needs. The selection of general machinery can be less than C7, and the selection of CNC machine tools can be more than C5 (corresponding domestic standards are generally P5-P4 and P4-P3, please refer to the sample for details).
