Functional analysis of pneumatic system in ship-shaped weld welding Fengzheng Wuxi Welding Machine Factory. When Jiangsu Wuxi 2140 is positioned in the weld ship-shaped weld, the flatness of the long surface of the weld is poor.
At the same time, there is a certain deviation between the positioning of the weld bead and the parallelism of the travel guide rail of the nose.
When welding. How to realize the micro-swing of the nose in the longitudinal and lateral directions, how to realize the longitudinal and lateral movement of the nose and the pre-positioning of the nose in the longitudinal direction is an urgent need to solve the movement. Its pneumatic principle
The lateral movement of the head of the 1 oscillating head is made up of 1 pressure regulating valve, 1 position solenoid valve, 1 double rod cylinder, 2 needle valve check valve and throttle valve group. When the toggle switch on the control panel is in the hold position, it does not pick up. The air intake at both ends of the double-cylinder cylinder utilizes the compressibility of the air to achieve a small amount of lateral swing of the nose in the machine head, thereby achieving a state of balanced balance. The longitudinal movement of the longitudinal movement head of the 2 handpieces is regulated by 2 1 position. 1 people along the 1! And a solenoid valve is often 13.
V4, V5. Two single-rod cylinders and a combination valve of the needle check valve and the throttle valve. When, look for the twisted Yin, hit the position where the + gasification source directly supply gas. The longitudinal cylinder pushes the handpiece upwards; when the toggle switch on the control panel hits, the position. Dynamic. 4.5 are all + skillful. The nose of the machine is out of gas according to the self-weight of the 4th. Thereby, the downward movement of the machine head is realized; when the button F switch on the control panel is in the locked position, v2, v4, v5 are actuated. V3 does not work. The brake cylinder is supplied with air, and the longitudinal cylinder does not lose gas, thereby ensuring that the head is locked in a certain position; when the button on the control panel is in the holding position. , both + action. The longitudinal cylinder is supplied with air through the pressure regulating valve 2, so that the head has a fixed floating force. However, this air pressure is not enough to lift the entire head, thereby reducing the pressure on the workpiece. Reduce welding distortion. And it can realize a small amount of vertical swing in a small range.
In the head of the 刖282.1000 gantry welding equipment manufactured for Shandong Qijian, the whole set of pneumatic systems are all imported components, the actual application effect is ideal, the weld seam is beautifully formed, the defects are greatly reduced, and the user's approval is obtained. This set of pneumatic systems is non-polluting.
The installation is simple and convenient, and in recent years, the manufacturing technology is getting better and better, and the service life is getting longer.
The application of automation in the industrial field is also becoming more and more extensive. The date of the heat is also very uneven, and the result is very hot outside and the inner wall is still cold.
At the end of the game, welding 1 is afraid of hot on the asbestos cloth on the fort, which is annoying. The preheating temperature is not guaranteed, and it is easy to cause a large temperature difference stress to cause the root crack.
3 multi-layer welding affects the large diameter thick-walled tube after argon arc welding. It is common to weld more than ten layers to weld the weld. If the temperature between the channels is not well controlled, it will cause layer-by-layer accumulation of hydrogen. In addition, the weld shrinkage causes a large shrinkage stress.
The root of the weld is created. Stress concentration. It also causes the generation of root cracks.
In short, large-diameter thick-walled tubes are welded. The causes of root cracks are manifold. A little negligence is very easy to produce. On-site processing is very troublesome. And seriously affect the quality of welding.
3 Process measures to prevent root cracks Through the above analysis, in addition to the selection of suitable welding materials, the wire surface is strictly derusted and the electrode is strictly baked. Strict welding process measures should also be taken from the following aspects to prevent recurrence of root weld cracks.
1 pipe and fittings. Use 1.2 groove. Avoid double and padded bevels.
2 The pipe and the pipe and the pipe fittings must be placed in a stable position, and there must be no vibration or blow around.
3 pays the mouth to the standard, after the request. Use the steel head to fix the spot. The diameter of the pipe is 273,1, and the pipe point is fixed.
Pipes with a wall thickness greater than 40,1 and pipe fittings, argon arc welding must be uniformly preheated by induction heater or far-infrared heater before the bottom welding. Do not use oxyacetylene flame heating 1 preheating to 200250, can be used for bottom welding Should be selected 4 welding 艺 1 art number.
After the bottom welding. Slowly cool to room temperature without removing the insulation.
Perform magnetic particle or stain detection. Observe the defects such as cracks with a low magnification magnifying glass, and then preheat it to the specified temperature, and then carry out the arc welding cover. During the welding process, it is always welded to 253, 1 thickness, and the product is slowly cooled to room temperature without removing the heat insulator. The middle 7-line flaw detection of the weld is correct. Then preheating and welding the welds continuously and wrapping them with asbestos cloth, then strictly cleaning the weld surface, self-checking, and stamping the steel code.
Post-weld heat treatment is performed by induction heating or far infrared heating.
The heat treatment temperature was 720750, and the hardness was measured after the heat treatment. 250. Finally, the area around the weld bead 300 was polished to perform ultrasonic flaw detection.
4 Conclusions 2.250 wide series of low-alloy heat-resistant steel large-diameter thick-walled tubes when welding root cracks. As long as you understand the mechanism of its production, it is completely preventable to take reasonable measures in the process.
The present invention provides a multifunctional pull faucet, comprising: a faucet body, a drawing part is provided at the water outlet port thereof, and the drawing part is connected to a main channel, wherein at least three are provided in the faucet body A branch channel, and the three branch channels are all connected to the main channel. A multifunctional pull faucet provided by the present invention, wherein the hot water channel, the cold water channel and the water purification channel (pure water channel) are all connected to the main channel , And the main channel is connected with the drawing part on the main body of the faucet, so that the drawing part can obtain the water quality (hot water, cold water, purified water or pure water) required by different users, thereby improving the user experience, and , By integrating the hot water channel, cold water channel and pure water channel (pure water channel) into the main channel, the internal structure of the faucet is simplified, and the production cost of the faucet is reduced.
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