A multi-objective optimization design method for ultrasonic cutting tools
An ultrasonic cutting and cutting tool technology, which is applied in computer-aided design, calculation, instruments, etc., can solve problems such as low tool life, rising cutting temperature, and workpiece defects, so as to improve performance and effect, and improve cutting force.
Active Publication Date: 2021-11-23
DALIAN JIAOTONG UNIVERSITY
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Problems solved by technology
The disadvantages of the high-speed milling method are: the processed workpiece has defects, poor quality, and low tool life.
Its shortcoming is that only a single vibration frequency factor is considered. When the frequency tracking is difficult and the vibration amplitude of the tool decreases, the cutting force will increase and the cutting temperature will rise, which will affect the service life of the tool and the processing quality, and cause defects in the workpiece. At the same time, this method does not Considering the impact of tool geometry parameters on cutting performance, the design method is not perfect
Its shortcoming is that it does not consider the importance of the relative size of each sub-target value range, which will cause the problem of weight imbalance. Therefore, the design method is flawed
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[0067] The concrete steps of ultrasonic cutting tool design method of the present invention are as follows:
[0068] 1. Determine the tool geometry parameters to be optimized.
[0069] The tool to be optimized is a disc knife, and the geometric parameters include the rake angle of the disc knife 5, the back angle of the disc knife 4, the diameter of the disc knife 1 and the length of the disc knife.
[0070] 2. Determine the operating frequency of the system.
[0071] The tool to be optimized and the ultrasonic horn are composed of an integrated connector, and the modal analysis is carried out on the integrated connector to determine the vibration frequency and order of the integrated connector under different geometric parameters of the tool. According to the tracking ability of the ultrasonic power supply and the actual Cutting processing requirements, determine the geometric parameter interval of the tool when the vibration frequency of the integrated connector is at the s...
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A multi-objective optimization design method for an ultrasonic cutting tool, including tool modal analysis, cutting performance analysis, and data processing. The modal analysis includes modal analysis of an integrated connection composed of an ultrasonic cutting tool to be optimized and an ultrasonic horn. Data processing includes fitting mathematical expressions and importance with sample points, weight distribution processing of value range intervals, and iterative calculation of geometric parameters of ultrasonic cutting tools to be optimized by genetic algorithm to obtain the final optimized geometric parameters of the tool. The beneficial effect is that multiple factors affecting tool life are comprehensively considered, problems such as large cutting force, high cutting temperature, and large wear rate in tool design are well improved, and the performance and effect of ultrasonic cutting of the tool are improved.
Description
technical field [0001] The invention belongs to the technical field of ultrasonic cutting tools, in particular relates to the optimal design of ultrasonic cutting tools, in particular to a multi-objective optimal design method of geometric parameters of ultrasonic cutting tools. Background technique [0002] Honeycomb core composite materials are often used in the aerospace field, and high-speed milling is generally used at present. The disadvantages of the high-speed milling method are: the processed workpiece has defects, poor quality, and low tool life. In order to solve the deficiency of the high-speed milling processing method, there is an ultrasonic cutting processing method in the prior art. The ultrasonic cutting processing method can effectively avoid the defects of high-speed milling, reduce cutting force and cutting temperature, and greatly improve processing efficiency. [0003] In the prior art, CN104318007A patent discloses a method for designing ultrasonic cu...
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IPC IPC(8): G06F30/17G06F119/04G06F119/14
CPCG06F30/17G06F2119/04G06F2119/06
Inventor 马付建张文超张生芳庞皓文刘宇沙智华
Owner DALIAN JIAOTONG UNIVERSITY