Identification method of dynamic cutting force change characteristics of high-efficiency milling cutter

Abstract

The invention discloses a method for identifying dynamic cutting force variation characteristics of a high-energy-efficiency milling cutter, belonging to the technical field of milling cutters. It includes the following steps: formulating the experimental method of high-efficiency milling vibration and dynamic cutting force, calculating the instantaneous cutting volume of the milling cutter and its teeth, determining the characterization method of the variation characteristics of milling vibration and dynamic cutting force in different cutting periods, establishing Detection method for the influence characteristics of cutter tooth error distribution and milling vibration on dynamic cutting force. The invention obtains the variation characteristics of milling vibration and cutting force under the conditions of different rotational speeds and cutter tooth error distribution through high-energy-efficiency end milling cutter cutting titanium alloy experiments, constructs a milling cutter instantaneous cutting volume calculation model, and proposes a milling cutter instantaneous cutting behavior sequence construction method. The improved grey relational analysis method was used to reveal the response characteristics of dynamic cutting force to the error distribution of cutter teeth and milling vibration.

Description

Technical field: [0001] The invention belongs to the technical field of milling cutters, and particularly relates to a method for identifying dynamic cutting force variation characteristics of a high-energy-efficiency milling cutter. Background technique: [0002] During the cutting process of the high-efficiency milling cutter, the cutting force fluctuates frequently due to the intermittent cutting impact of the cutter teeth, resulting in unstable cutting and deterioration of the machining quality, resulting in the inability to obtain the cutting energy efficiency and reliability of the cutting process. Effective guarantee and revealing the dynamic cutting force variation characteristics of high-efficiency milling cutters are the premise to solve the above problems. At present, there are two types of methods to solve the changing characteristics of dynamic cutting force: one is the empirical method based on experiments, which uses the transient cutting force obtained from t...

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Problems solved by technology

[0003] In order to overcome the defects that the existing method for solving the dynamic cutting force change characteristics is quite different from the actual change and does not have universality, the present invention provides an identification method for the dynamic cutting force change characteristics of high-energy-efficiency milling cutters. By revealing the cutter tooth error According to the relationship between the distribution and the dynamic cutting force of milling cutter, a calculation method for the instantaneous volume of milling cutter is proposed. This method uses the distribution of axial error, radial error and angle error between teeth to change the instantaneous cutting volume, and then the milling cutter Dynamic cutting forces play a role

[0006] Step B. The method of calculating the instantaneous cutting volume of the milling cutter and its teeth: by solving the instantaneous cutting volume of the milling cutter and its teeth, the problem that there is no direct mapping relationship between the cutter tooth error and the dynamic cutting force is solved. And use the peak and valley values ​​of the instantaneous cutting volume of the milling cutter to reveal the real-time correspondence between the tooth error distribution and the dynamic cutting force, and reveal the influence of the tooth error distribution on the cutting process of each tooth;

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