Method and device for controlling sliding table of friction welding machine
A friction welding machine and control method technology, applied in welding equipment, manufacturing tools, non-electric welding equipment and other directions, can solve the problems of high working environment requirements, very strict requirements on cleanliness of fluid medium, malfunction of electro-hydraulic servo valve, etc. Good adaptability to oil source, good system stability and convenient parameter adjustment
Inactive Publication Date: 2003-08-13
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
In China, the electro-hydraulic servo system has also been modified on the friction welding machine, but in the actual production process, it is found that although the electro-hydraulic servo system has fast dynamic response and good controllability, it has high requirements for the working environment, especially for fluid media. The cleanliness requirements are very strict, making the manufacturing cost and maintenance cost high, and there are still some deficiencies in the material, surface treatment quality, and system cleanliness, which leads to the frequent failure of the electro-hydraulic servo valve, a key component in the electro-hydraulic servo system. , so that the electro-hydraulic servo system of the friction welding machine cannot work normally, which directly hinders the application of computer control in friction welding production
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[0019] refer to figure 1 , in the preparatory stage of friction welding, give the electro-hydraulic proportional overflow valve 3 a full-scale high current to make it in the cut-off state. In the cut-off state, the electromagnet of the two-position two-way reversing valve 6 is not energized, so that the whole device is in an unloaded state, and the oil pump 4 is started, and the preparatory work is completed.
[0020] Power up the electromagnet of the two-position two-way reversing valve 6, so that the whole device is in a loaded state. Adjust the overflow valve 7 so that the pre-valve pressure of the electro-hydraulic proportional overflow valve 3 remains unchanged during the welding process of the friction welding machine.
[0021] During the welding process, when the fixture system is clamped, the proportional electromagnet on the side of the electro-hydraulic proportional reversing speed regulating valve 2B is energized, and the pressure oil enters the rodless chamber on...
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A method for controlling the slide table for friction welding machine is characterized by that the electro-hydraulic proportional direction and speed regulating valve and the proportional overflow valve are regulated to control the moving direction, speed and axial pressure of slide table. Its apparatus is composed of computer system, pressure sensor, A / D converter, D / A converter, V / I converter, and said two valves. Its advantages are real-time effective regulation, and high reliability and stability.
Description
technical field [0001] The invention relates to a control method and device for a slide table of a friction welding machine. Background technique [0002] refer to Figure 4 , the friction welding machine is a kind of mechanical-electrical-hydraulic integrated equipment. At present, most of the domestic use hydraulic force application system composed of electro-hydraulic reversing valve, speed control valve, electromagnetic overflow valve and other switch control valves to control the sliding of the friction welding machine. Table motion direction, speed and axial pressure. Mainly use 2 pressure control valves, 2 flow control valves, and 3 directional control valves to complete the control. During the friction welding process, these seven valves frequently alternately operate, and the probability of failure is high. In addition, this hydraulic force application system can only change the axial pressure parameters in a stepwise manner, and cannot perform closed-loop control...
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IPC IPC(8): B23K20/12
Inventor 杜随更鄢君辉傅莉王忠平
Owner NORTHWESTERN POLYTECHNICAL UNIV