The more important part of the machine tool is the ball screw, which directly affects the function of the machine tool. So how can we further improve the function of the ball screw?
Now it is an era that pays attention to a rate, and there are higher requirements for machine tools. If you want the machine to function better, you need a better function of the ball screw. Let's briefly introduce the method today:
1. Properly increase the screw speed, lead and number of threads
Now commonly used large-lead ball screws to match the nominal diameter and lead are: 4020, 5025, etc., and the feed speed can reach more than 60m/min. In order to improve the rigidity and load capacity of the ball screw, a double-threaded thread is generally used for the large-lead ball screw to increase the useful load-carrying number of the ball.
2. Improve the structure and improve the fluency of ball movement
Improve the ball circulation reverse equipment, optimize the curve parameters of the ball return groove, select the three-dimensional shape of the ball tube and the ball return device, and truly introduce the ball into the nut body along the lead angle of the internal thread, so that the direction of the ball movement is the same the raceways are tangent instead of intersecting. This can reduce the impact loss and noise.
Three, the selection of ball screw support bearings
The selection of ball screw bearings is very important, as it directly affects the lifespan and functions of engraving machines and other machine tools or spindles.
4. Use the "Hollow Core and Strong Cold" skill
The high-speed ball screw generates high temperature due to conflict during operation, resulting in the thermal deformation of the screw, which directly affects the machining accuracy of the high-speed machine tool. Using the "hollow strong cooling" technique is to pass the constant temperature cutting fluid into the hole of the hollow screw to force the ball screw to keep the temperature of the ball pair stable. This method is a useful way to improve the high-speed function and working accuracy of large ball screws.