CNC machining has stricter requirements for the rigidity, accuracy, durability, and dynamic balance performance of the cutting tool. The selection of cutting tools should focus on the analysis of the structure and processability of the workpiece, taking into account factors such as the processing ability of CNC machines, workpiece materials, and process content. The structural forms of tool holders for CNC machine tools are divided into integral and modular types.
The working part of the integrated tool holder for clamping the tool is integrated with the handle used for mounting and positioning on the machine tool. This kind of tool handle has poor adaptability to the transformation of machine tools and parts. In order to adapt to the transformation of parts and machine tools, users must reserve various specifications of tool holders, so the utilization rate of tool holders is low. Modular tool system is a relatively advanced tool system in which each tool handle can be assembled through various series of modules. By adopting different assembly schemes for different machining parts and machine tools, a variety of tool shank series can be obtained, thereby improving the adaptability and utilization rate of the tool shank.
The selection of tool handle structure should take into account advanced technology and economic rationality:
1、 For some simple tools that are used repeatedly for a long time and do not require assembly, it is advisable to equip them with integral tool handles, making the tools rigid and inexpensive (such as end mill tool handles, spring chuck tool handles, and drill chuck tool handles for processing the outer contour of parts);
2、 When machining multiple varieties and small batches of parts with frequently varying apertures and hole depths, modular tool handles should be selected to replace a large number of integral boring tool handles and reduce processing costs;
3、 For many CNC machine tools, especially when the spindle end and tool changing manipulator are different, modular tool handles should be selected. As the intermediate module (extension rod) and working module (tool loading module) used by various machine tools are universal, it can greatly reduce equipment investment and improve tool utilization. In order to improve processing efficiency, it is necessary to select high-efficiency cutting tools and tool holders as much as possible.