Improvement of the fixed-length mechanism of fiber laser cutting machine
The forming machine in the welded pipe workshop has a fiber laser cutting machine, which is equipped with electric control and air control interlocking equipment. Since the operation of the fiber laser cutting machine, the length of the fiber laser cutting machine has not been handled very well. The cut pipes are messy and uneven, and the tension affects the quality of the electric welded steel pipe. To solve this problem, we began to observe and study the machine. A thorough analysis of the air and electronic control system of the machine was carried out. The original method of the machine is: baffle size + trolley advancement → clamping → tool feed delay → tool retraction delay 'buffer operation → loose clamp → trolley return → interlock recovery When the steel pipe is rolled out of the forming machine and pressed on the baffle, the trolley advances and self-controls one-sided action, and the trolley advances. At this time, the steel pipe also advances at a different rate from the trolley because of the influence of the inconsistency of the linear velocity of the forming machine and the shrinkage of the atmosphere. Due to the high performance and poor positioning accuracy of pneumatic components, the fiber laser cutting machine cannot be reliably fixed to length.
After discovering the key to the question, we tried the line speed of the fiber laser cutting machine (limax can reach som min, lichuan has 30m min, and vmin is around), I tried various parameters such as the working distance, air pressure, and time of action of the various cylinders. After a general explanation, an daring hypothesis occurred at the end, that is, to change the original working method and adjust the working time, distance, air pressure and other parameters of the various components of the unit. Make it comply with the molding machine's request for the length of the fiber laser cutting machine, so that the operation of all units can be coordinated to achieve the goal of improving the accuracy of the length. For this reason, we have reorganized the operating method of the unit, and the improved operating method has also clearly improved the electronic control response. After the improvement, when the electric welded steel pipe is rolled out of the forming machine, there is only a press-fit switch and the pipe is clamped within the preset cutting length. At this time, the trolley increases the cylinder to supply a thrust to reduce the static inertia of the trolley and start the trolley. progress. We adjust the pressure of the clamping cylinder to 0.5MPa or so, and the pressure of the trolley booster cylinder and the buffering cylinder to 0.4MPa, use the feature of large contractility of the atmosphere to avoid damage to the machine parts by the impact force, so that the trolley is improved. The initial speed and operating speed of the machine are always synchronized with the line speed of the pipe in the molding machine. After the trolley starts, it must be close to the thrust of the tube in the forming machine to push its progress. The pulling force of the running cylinder helps to stabilize the speed. Follow the action of the trolley to start the fiber laser cutting machine.
The entire electrical and pneumatic control process is: the fiber laser cutting machine reaches the fixed-length length pressing switch SQ1 after the tube is sizing from the forming machine. The relay KA1 is energized and closed, so that the solenoid valve YV._ YVi. YV3 is operated to control pneumatic simultaneous operations such as clamping, trolley progress, and buffer operation. Following KA1, the central relay KA2 is energized, followed by the photo-cathode relay KT, the central relay KA3 is energized, the solenoid valve YV4 works, and the pneumatic element moves into the blade surface, and the flying saw begins to progress in the trolley.