Ultrasonic assisted maching technology is an emerging processing technology in the past 20 years and an important branch of power ultrasound. This processing technology can not only be used to process ordinary metals and other materials, but also to complete the processing of materials with special properties such as high hardness, thinness, brittleness and softness.
Ultrasonic cutting technology is an important part of ultrasonic machining. Compared with traditional cutting processing, it has obvious speciality. During the ultrasonic cutting process, periodically changing ultrasonic frequency vibration is applied to the cutting tool to assist the cutting of the tool. Therefore, the contact between the tool and the workpiece is intermittent, completely changing the traditional cutting mode. Due to this characteristic of ultrasonic cutting, long-term contact between the tool and the workpiece can be avoided during the cutting process, which not only reduces the heat generated when the tool is in contact with the workpiece, but also reduces the processing temperature, Moreover, it is also possible to avoid the tool being squeezed with the workpiece for a long time during the cutting process, which increases the service life of the tool and increases the machining accuracy. Therefore, some experts believe that ultrasonic cutting technology can solve some of the inherent problems in traditional cutting, so as to get good cutting results.
The concept of ultrasonic vibration to remove materials has always been valued by foreign scholars. The crack propagation process during ultrasonic cutting is controllable and related to the vibration mode of the blade, so that the blade cutting vibration mode can be changed to improve the efficiency of ultrasonic cutting and reduce power consumption.
Ultrasonic cutting of plastic material has obvious advantages. First of all, the ultrasonic cutting speed is faster when cutting plastic, because the ultrasonic vibration can open the molecular structure inside the material, making the cutting material easier. Secondly, there is no problem of breaking the material during the ultrasonic cutting process, so the ultrasonic cutting does not generate dust, and it is no need to add dustproof and dust removing equipment to the machine tool; Again, ultrasonic cutting greatly reduces the lateral feed force, so there is no deformation during the machining of the workpiece, and the difficulty of clamping and fixing the workpiece is greatly reduced.