| For the sake of identifying rapidly and accurately the produced parts, people usually mark the obvious sign or mark on the important parts. The mehods for the traditional industrials marking are not only inefficient and unaesthetic, but also short of long-term stability and high for the rate of waster. Relatively, because of simple construction, low price, well-controlled performance, rapid speed, the mode of gas-powered combining electric-powered is especially suitable. A brand-new technique for pneumatic marking is put forward in this paper, and the research for the key technique of pneumatic marker-made is thoroughly carried out.The main contents in this dissertation are summarized as follows: (1) The overall structure and configure of pneumatic marker-made are developed. The key components are designed and matched by three-dimensional design method. (2) The technique of cooperative control of three axes is developed. With the method of frequency control, the cooperative control between the vibration frequency of marking head and the speed of electric actuator is realized, and the marking quality is wonderful. (3) The communication and real time control technique beteen computer and PLC and servo unit is developed. The communication between computer and PLC is realized by the programming port, and the communication between computer and servo unit is realized by databus, and the cooperative control between PLC and servo unit is realized by an audion. (4) The technique of design and conversion for figures and characters is developed. The figures and characters are edited in AutoCAD. By second-development of AutoCAD, useful information of geometric figure is extracted and automatically transformed into programme of marker-made machine tool.The pneumatic marker-made machine tool runs well with reliable hardware, which is provided with some characteristics, such as no air pollution, rapid speed, high precision. So the prospective design aim can be realized. |
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