Research method for coupling characteristics of non-linear vibration system of cutter-workpiece of turning
A technology of nonlinear vibration and turning tools, which is applied in the field of turning processing and nonlinear dynamic characteristics research, and can solve the problem of less interaction between tools and workpieces
Active Publication Date: 2019-02-19
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology
Due to the nonlinearity and complexity of the coupled vibration, there are few theoretical and experimental results on the interaction between the tool and the workpiece.
Method used
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Embodiment 1
[0074] A method for researching coupling characteristics of a turning tool-workpiece nonlinear vibration system, comprising the following steps:
[0075] The first step is to build a tool-workpiece coupling vibration test system
[0076] (11) The system includes a three-way acceleration sensor vibration measurement system and a non-contact displacement sensor vibration measurement system.
[0077]The three-way acceleration sensor vibration measurement system includes a three-way piezoelectric acceleration sensor, a charge input signal acquisition and analysis system. In order to avoid the sensor connection line from being collided during turning, the three-way piezoelectric acceleration sensor is placed on the lower surface of the tool handle near the tool tip, and is used to pick up and measure the x, y, and z parameters on the lower surface of the tool handle near the tool tip. Acceleration vibration signal. Among them, the x, y, and z-direction vibrations are respectively...
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The invention relates to a research method for coupling characteristics of a non-linear vibration system of a cutter-workpiece of a turning. The research method comprises the following steps: S1, establishing a coupling vibration test system of the cutter-workpiece; S2, performing a turning test on the workpiece; synchronously testing of three-way vibration at the tool tip during machining and radial vibration of the workpiece parallel to the tool holder, by using a vibration measurement system of a three-way acceleration sensor and a vibration measurement system of a non-contact displacementsensor; S3, drawing a phase trajectory graph and calculating the cross-correlation coefficient of the vibration between each two-directional vibration and the tool-workpiece of the cutter, based on the obtained tool and workpiece vibration signal time sequence; therefore, the influence between which of the two directions of the cutter three to the nonlinear vibration is most obvious and the correlation between the vibration of the tool and the workpiece is determined; and S4, establishing a fitting model between the radial vibration of the workpiece and the radial vibration and the turning parameter of the tool by a least square method principle, based on the turning test data.
Description
technical field [0001] The invention relates to a method for researching the nonlinear dynamic characteristics of a tool and a workpiece vibration system during turning processing and a method for establishing a coupling model, in particular to a method for researching the coupling characteristics of a turning tool-workpiece nonlinear vibration system, which belongs to the field of turning processing and nonlinear dynamics research. Background technique [0002] It is understood that the level of machining determines the industrial level of a country. Turning is an important means of machining, and it has always been a research hotspot. In turning processing, the size and shape of the workpiece can be changed by using the rotation of the workpiece and the relative movement of the tool to obtain parts that meet the requirements. During the turning process, the coupling system composed of the workpiece and the tool often vibrates. This kind of vibration causes the turning p...
Claims
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Login to View More IPC IPC(8): G01M7/02
CPCG01M7/02G01M7/025
Inventor 李顺才霍逸轩吴春力喻秋刘洁袁志敏
Owner XUZHOU NORMAL UNIVERSITY