Configuration of spindle bearings for CNC machining machine tools

Configuration of spindle bearings for CNC machining machine tools


News Mar 30 2020

Most of the spindle components of CNC machine tools use rolling bearings as the spindle support. At present, there are three main configurations:
1. Front support adopts double-row short cylindrical roller
Child bearing and 60. In numerical control machining, the control system sends instructions to make the tool perform various kinds of movements in accordance with the requirements, and the numbers and letters indicate the shape and size of the workpiece, such as technical requirements and processing requirements. It refers to the process of part processing on CNC machine tools. In order to improve the degree of production automation, shorten the programming time and reduce the cost of CNC processing, a series of advanced CNC processing technologies have also been developed and used in the aerospace industry. Angular contact double row radial thrust ball bearing combination, the rear support adopts radial thrust ball bearings. This deployment method greatly improves the comprehensive rigidity of the spindle, which can meet the requirements of strong cutting. It is generally used in the spindles of various CNC machine tools (attribute: automated machine tools). This configuration of the rear bearing can also use cylindrical roller bearings, to further improve the radial rigidity of the rear bearing.
CNC machining machine











2. Front support adopts high precision (accuracy) double column
Heart thrust ball bearings. In numerical control machining, the control system sends instructions to make the tool perform various kinds of movements in accordance with the requirements, and the numbers and letters indicate the shape and size of the workpiece, such as technical requirements and processing requirements. It refers to the process of part processing on CNC machine tools. In order to improve the degree of production automation, shorten the programming time and reduce the cost of CNC processing, a series of advanced CNC processing technologies have also been developed and used in the aerospace industry. ? CNC machine tools (attributes: automatic machine tools) spindle bearing configuration? Centripetal thrust ball bearings have good high-speed performance, the maximum spindle speed can reach 4000r / min, but its bearing capacity is small, only suitable for high speed, light load and precision precise) CNC machine tool spindle. In order to increase the rigidity of the main shaft in this configuration, the front support can be combined with four or more bearings, and the rear support can be combined with two bearings.
CNC machining machine











3. The front and rear bearings use double-row and single-row tapered roller bearings. This kind of bearing can withstand large radial and axial forces, so that the spindle can withstand heavy loads, especially strong dynamic loads. It has good rigidity and good installation and commissioning performance. . CNC machining generally CNC machining usually refers to computer-controlled precision machining, CNC machining lathes, CNC machining milling machines, CNC machining boring and milling machines, etc. The feed route for finishing is basically performed along the contour of its parts. Therefore, the focus of determining the feed route is to determine the feed route for rough machining and empty stroke. However, this configuration (deploy) limits the maximum speed and accuracy (precision) of the spindle, and is only applicable to spindles of CNC machine tools (attributes: automated machine tools) with medium precision, low speed and heavy load.

       
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