Piezoelectric vibration feeding device is a new type of vibration feeding device which applies the pressure point technology to the vibration transmission. It uses the counter piezoelectric effect of the piezoelectric sheet to produce the vibration, and drives the material as the driving source to realize the transportation of the material.
1, the status quo at home and abroad:
For this new type of vibration feeding device, its structure and working principle are different from the traditional electromagnetic or mechanical drive vibration feeding device, so it has many traditional vibration feeding device does not have the characteristics:
(1) simple structure, installation and maintenance more convenient;
(2) the use of piezoelectric film as a driving source, no motor, electromagnetic exciter and other drive devices, and no shaft, rod, belt and other mechanical transmission components, simple structure, easy processing;
(3) to change the drive signal amplitude, pulse width and frequency of any one, can adjust the transport rate, control parameters, controllability is good;
(4) no rotation inertia, almost no acceleration and deceleration process, start, stop quickly, fast response performance;
(5) does not produce interference electromagnetic field, nor is it affected by electromagnetic interference signal;
(6) work in low frequency or ultrasonic section, the noise is small;
(7) in the resonant or non-resonant state of work, so less energy consumption;
(8) the driving force is slightly insufficient, can not send too heavy material parts, so most of these devices used in the material trace or precision transport. Piezoelectric vibration feeding device is a major breakthrough in the field of vibration feeding, domestic and foreign scientific and technological personnel have carried out a different degree of research, and achieved some results, according to the way forward materials can be divided into straight and spiral Type two.
2, the status of foreign research in industrial developed countries or regions, Japan, the United States the most representative, especially in Japan, the piezoelectric vibration feeding device theory, design and calculation of more in-depth and complete, also introduced a variety of New type and vibration mechanism of special - shaped mechanism.
For the straight-type piezoelectric drive vibration feeding device, Japan has now developed three devices.
The first structure for the piezoelectric film using double piezoelectric crystal chip. In the piezoelectric chip to add AC, double piezoelectric crystal film to produce periodic bending transmission, driven trough oblique transmission, and thus to achieve the transport of materials.
The second structure for the piezoelectric film also uses a double piezoelectric crystal chip.
The third structure, it is not the application of double piezoelectric crystal chip, but in a pair of piezoelectric film on the AC phase of the opposite.
In addition to the common characteristics of the piezoelectric vibration feed device described above, they also have their unique features: (1) the design of the piezoelectric vibrating feeding device in the United States has made great progress.
(1) the piezoelectric film to use its degree of direction of the stretch vibration mode;
(2) the use of specially manufactured double piezoelectric crystal chip, or in a pair of piezoelectric film on the opposite phase of the voltage, not only increased production costs, and greatly improve the power requirements;
(3) straight into the piezoelectric vibration feeding device are used vibration components and trough support components separate way, which makes the vibration element of the force system is simple;
(4) the majority of the need to increase the vibration to expand the vibration amplitude, so that the device structure is complicated;
(5) The second type of structure and the helical piezoelectric vibration feed device are separate from the support element of the fuel tank (material boat) and the vibration element, but the vibration element still receives the weight of the tank and the material, Component force is complex, will affect the stability of the device;
(6) The direct structure of the second type of structure and the vibrating element of the helical piezoelectric vibration feeding device are fixedly mounted, and the transmission of the trough is very constrained, and overcoming this constraint will consume more energy;
3, the domestic research status China’s piezoelectric vibration feed device research overall level is still lagging behind the developed countries and regions, molding products rarely, domestic manufacturers of automated production lines or equipment, piezoelectric vibration feeding device mostly from Japan, the United States Manufacturing relatively developed countries and regions. |
Record: ICP.17021542
