CN102071309A - Six-degree-of-freedom vibratory stress relief device - Google Patents

Abstract

The invention relates to a six-degree-of-freedom vibration aging device, which includes six excitation branch chains, a moving platform and a frame. The upper ends of the six excitation branch chains are respectively connected to the moving platform through the second spherical pair, the fourth spherical pair, the sixth spherical pair, the eighth spherical pair, the tenth spherical pair and the twelfth spherical pair, and the lower ends are respectively passed through the first spherical pair. , the third spherical pair, the fifth spherical pair, the seventh spherical pair, the ninth spherical pair and the eleventh spherical pair are connected to the frame. The moving platform is used for installing various workpieces for vibration aging treatment. Through the joint excitation of six exciters, the moving platform can generate six-degree-of-freedom vibration in space, so that the workpiece can be excited to generate resonances of various frequencies and vibration modes, including combined resonance, subharmonic resonance, multiple resonance, etc. Non-linear vibration to ensure that sufficient stress and strain can be generated inside the workpiece, so that the residual stress of the workpiece can be effectively eliminated, and the effect of vibration aging can be significantly improved.

Description

Six degrees of freedom vibration aging device

technical field

The invention relates to the field of mechanical processing, in particular to a six-degree-of-freedom vibration aging device.

Background technique

Vibration aging treatment is a method commonly used in engineering materials to eliminate their internal residual internal stress. Its mechanism is to apply a dynamic stress to the workpiece through vibration. When the dynamic stress is superimposed with the residual stress of the workpiece itself, it reaches or exceeds the At the microscopic yield limit, the workpiece will undergo microscopic or macroscopic local and overall elastic-plastic deformation, and at the same time reduce and homogenize the residual stress inside the workpiece, and finally achieve the purpose of preventing deformation and cracking of the workpiece and stabilizing the size and geometric accuracy of the workpiece. The existing vibration aging device is single-degree-of-freedom, which utilizes an exciter to vibrate to cause a certain resonance of the workpiece to achieve the purpose of vibration aging. This type of vibration aging device can only vibrate in a certain direction, and it is difficult to generate resonance of many vibration modes of the workpiece, let alone excite the resonance of each vibration mode of the workpiece in all directions in space, so it is difficult to generate sufficient dynamic stress on the workpiece. The vibration effect is limited, especially for large or complex structural components, it is difficult to eliminate the residual stress, which is an important reason why the vibration aging process has not been widely used.

Contents of the invention

The object of the present invention is to provide a six-degree-of-freedom vibration aging device, through the joint excitation of six exciters, the moving platform can generate vibrations with six degrees of freedom in various spaces, so that it can be excited and fixed on the moving platform by a clamp. The workpiece produces resonances of various frequencies and modes, including nonlinear vibrations such as combined resonance, subharmonic resonance, and multiple resonances, so as to ensure sufficient stress and strain in various places inside the workpiece, effectively eliminate residual stress, and significantly improve vibration aging. Effect.

The present invention achieves the above object through the following technical solutions: a six-degree-of-freedom vibration aging device, which includes six vibration-exciting branch chains, a moving platform and a frame. Its structure and connection method are:

Wherein, the first excitation branch chain is provided with a first electromagnetic exciter, connected with the frame through the first spherical pair, and connected with the moving platform through the second spherical pair.

The second excitation branch chain is provided with a second electromagnetic exciter, connected with the frame through the third spherical pair, and connected with the moving platform through the fourth spherical pair.

The third excitation branch chain is provided with a third electromagnetic exciter, connected with the frame through the fifth spherical pair, and connected with the moving platform through the sixth spherical pair.

The fourth excitation branch chain is provided with a fourth electromagnetic exciter, connected with the frame through the seventh spherical pair, and connected with the moving platform through the eighth spherical pair.

The fifth excitation branch chain is provided with a fifth electromagnetic exciter, which is connected with the frame through the ninth spherical pair, and connected with the moving platform through the tenth spherical pair.

The sixth excitation branch chain is provided with a sixth electromagnetic exciter, which is connected to the frame through the eleventh spherical pair and connected to the moving platform through the twelfth spherical pair.

The outstanding advantages of the present invention are:

Through the joint excitation of six exciters, the moving platform can generate vibrations with six degrees of freedom in various spaces, thereby exciting the workpiece to generate resonances of various frequencies and vibration modes, including combined resonance, subharmonic resonance, and multiple resonance. Non-linear vibration to ensure sufficient stress and strain in various places inside the workpiece, effectively eliminate the residual stress of the workpiece, and significantly improve the effect of vibration aging. The invention can play a better role in the vibration aging treatment of various types of workpieces such as high rigidity and high natural frequency.

Description of drawings

Fig. 1 is a front view of the six-degree-of-freedom vibration aging device of the present invention.

Fig. 2 is a structural schematic diagram of the six-degree-of-freedom vibration aging device of the present invention.

Fig. 3 is a top view of the six-degree-of-freedom vibration aging device of the present invention.

Fig. 4 is a schematic diagram of the work of the six-degree-of-freedom vibration aging device installed on the workpiece for vibration aging treatment according to the present invention.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to Figures 1, 2 and 3, a six-degree-of-freedom vibration aging device includes six vibration-exciting branch chains, a moving platform 2 and a frame 1.

1, 2 and 3, the first excitation branch chain has a first electromagnetic exciter 3, which is connected to the frame 1 through the first spherical pair 9, and connected to the moving platform 2 through the second spherical pair 10. There is a second electromagnetic exciter 4 on the second excitation branch chain, which is connected with the frame 1 through the third spherical pair 11 and connected with the moving platform 2 through the fourth spherical pair 12 . There is a third electromagnetic exciter 5 on the third excitation branch chain, connected with the frame 1 through the fifth spherical pair 13 , and connected with the moving platform 2 through the sixth spherical pair 14 . There is a fourth electromagnetic exciter 6 on the fourth excitation branch chain, connected with the frame 1 through the seventh spherical pair 15 , and connected with the moving platform 2 through the eighth spherical pair 16 . There is a fifth electromagnetic exciter 7 on the fifth excitation branch chain, connected with the frame 1 through the ninth spherical pair 17 , and connected with the moving platform 2 through the tenth spherical pair 18 . The sixth excitation branch chain has a sixth electromagnetic exciter 8 connected to the frame 1 through the eleventh spherical pair 19 and connected to the moving platform 2 through the twelfth spherical pair 20 .

Referring to Fig. 4, when the moving platform is mounted on the workpiece for vibration aging treatment, the combined vibration of six exciters can make the moving platform 2 generate vibrations with six degrees of freedom in various spaces, thereby exciting the The workpiece on the moving platform produces resonances of various frequencies and modes, including nonlinear vibrations such as combined resonance, subharmonic resonance, and multiple resonances, so as to ensure sufficient stress and strain in various places inside the workpiece and effectively eliminate the residual stress of the workpiece , significantly improving the effect of vibration aging.

Claims (1)

1. A six-degree-of-freedom vibration aging device is characterized in that the device comprises six branch chains for exciting vibration, a moving platform and a frame, and its structure and connection mode are: Among them, the first excitation branch chain is provided with a first electromagnetic exciter, which is connected with the frame through the first spherical pair, and connected with the moving platform through the second spherical pair, The second excitation branch chain is provided with a second electromagnetic exciter, which is connected to the frame through the third spherical pair and connected to the moving platform through the fourth spherical pair. The third excitation branch chain is equipped with a third electromagnetic exciter, which is connected to the frame through the fifth spherical pair and connected to the moving platform through the sixth spherical pair. The fourth excitation branch chain is equipped with a fourth electromagnetic exciter, which is connected to the frame through the seventh spherical pair, and connected to the moving platform through the eighth spherical pair. The fifth excitation branch chain is provided with a fifth electromagnetic exciter, which is connected to the frame through the ninth spherical pair and connected to the moving platform through the tenth spherical pair. The sixth excitation branch chain is provided with a sixth electromagnetic exciter, which is connected to the frame through the eleventh spherical pair and connected to the moving platform through the twelfth spherical pair.

Images