Analysis of the causes of deformation of aluminum alloy truss stage in the process of use
1. Due to the high temperature during welding, the welding method will be different.
Excessive temperature during the welding process will cause the welded truss to have a liquefaction response at one end. After the liquefaction response, it will quickly cool down. In this section of high temperature welding, more or less irregular degeneration is found. Many people see these welds from the naked eye. It feels like a metal lump, giving people a stronger illusion. In fact, the metal lump we see is uneven in density, and some are thick and some are really "swollen". Therefore, when choosing a truss, you must carefully observe whether their welding points are symmetrical or not.
2. The position of the welding seam of the aluminum truss stage after welding.
The aluminum truss stage itself is a large stressed metal structure. Before the aluminum truss stage is formed, it has undergone countless casting and welding. After each welding, there will be welds. These welds are not just scattered on the slats. At the joints of the aluminum truss stage, some welds are in other areas of the aluminum truss stage, such as the middle part of the bottom welding. The triangular or polygonal truss is more uneven, or the non-joint points are welded. These welds are themselves With the influence of residual stress in the welding seam, the rigid and strong truss shows a change in the truss line in order to achieve uniform force.
3. When the aluminum alloy light frame or stage frame is established, it is necessary to select a truss with good quality and correct specifications, which must have satisfactory hardness, and ensure that the truss is of good quality, so that the aluminum alloy light frame stage frame built is not easy to deform.
Which connection method of aluminum truss stage is more stable
First, the truss structure usually cannot apply the load to the linear member. When the load is applied to the member, assuming that the node is hinged, the truss only has the load member to bear the bending moment by the method of simply supported beam. Do not participate in the charge. In this way, this bending member must be strengthened. Assuming that the nodes are rigidly connected, each member will be bent as a whole by the method of forming a rigid frame. Not only the member itself, but also its nodes will also be subjected to a large bending moment, which needs to be strengthened.
A real truss structure must act on the node when it bears the applied load, in order to ensure that the load is borne by the overall member in a purely compressive or purely tensile manner, and the node only transmits the linear force of the member and bears the shear. Force, no bending moment is transmitted. In this case, the linear rods can be hinged or rigidly connected. In the case of no separation in force, the truss does not need to be strengthened at the truss node.
The characteristics of different overlapping methods of aluminum truss stage
First，Polyline-shaped aluminum truss stage: The upper chord node is located on the second parabola. If the upper chord is arched, it can reduce the bending moment generated by the inter-node load, but the manufacturing is more complicated. Under the action of uniform load, the shape of the aluminum truss stage is similar to the bending moment pattern of the simply supported beam, so the upper and lower chord forces are evenly distributed, the web members are less axial force, and the materials used are less. Stage truss form.
Second, the triangular aluminum truss stage: under the node load evenly distributed along the span, the axial force of the upper and lower chords is large at the end points and gradually decreases toward the middle of the span; the axial force of the web members is the opposite. Triangular aluminum truss stage are mostly used in roof trusses of tile roof due to the large difference in internal force of chords and unreasonable material consumption.
Third, the hollow aluminum truss stage: basically adopt the shape of the polygonal aluminum truss stage, the upper chord nodes are straight lines, there is no oblique web members, and only the vertical web members are connected with the upper and lower chords. The axial force distribution of the rod is similar to that of the polygonal aluminum truss stage, but the bending moment at the rod end changes greatly under the action of asymmetrical load. The advantage is that there are fewer rods intersecting at the nodes, and the construction and manufacturing are convenient.
What is the difference between aluminum truss stage and steel truss?
1. Use differently. aluminum truss stage are used for large light frames to suspend lights and sounds, and steel trusses are usually used for small advertising background shelves. The aluminum truss stage has screw aluminum truss stage and inserted aluminum truss stage. There are many types of steel trusses, and there are not so many varieties of steel trusses.
2. Different materials. One is that aluminum alloy is the main material, steel, and the natural use time will be very different.
3. The surface treatment is different. Steel is usually painted or galvanized to prevent rust, and aluminum alloys are usually metallic silver.
4. Varieties and specifications. Various aluminum truss stage, conventional 200*200mm, 300*300mm, 400*400mm, larger, steel usually only 200*200mm square tube model.
Aluminum truss stage should be treated with corrosion resistance
First of all, aluminum truss stage are used for a period of time either because the surface is clean, or because of adhesion, it will cause rust spots. At this time, pay attention to the anti-corrosion treatment of the truss. When the fire extinguishing part is removed, wax or coating is required to prevent rust. Paint care. In addition, some small connected parts such as pins and rivets are regularly inspected to prevent corrosion and rust treatment.
Secondly, of course, for special customized trusses, such as aluminum truss stage surface coating, it can be wiped with clear water and ventilated after drying. aluminum truss stage are widely used and can only be used for surface cleaning and anti-corrosion treatment, which can last longer.
Finally, the aluminum truss stage will have dirt, rain, etc. Do not use a rag to make the surface of the aluminum truss stage generally galvanized. Wiping the rag will make the metal lose its luster and look like it is old. If you need to wipe the surface, you can use fine fabrics, which can reduce scratches on the aluminum truss stage.
How to judge the quality of aluminum truss stage?
Truss surface gloss
The surface of the aluminum truss stage has a good reputation and generally has the luster, because the truss can be processed, can keep bright, beautiful and beautiful. Therefore, consumers can choose truly qualified products by observing the surface gloss during product purchase.
To purchase products, you must choose a guaranteed brand of aluminum truss stage, which can guarantee the stability of use. By improving the traditional steel frame structure, the high-quality aluminum truss stage is improved to greatly increase the force strength at both ends, effectively avoiding deformation and collapse.
Anti-rust treatment of aluminum truss stage
For aluminum truss stage, a certain degree of damage will be caused to the trusses during construction, disassembly, transportation and use. Long-term use will shorten the service life. In order to be reused, maintenance of the aluminum truss stage should be carried out.
During use, there will be dust and rain on the surface of the aluminum truss stage. At this time, do not wipe with a cloth. In this way, the aluminum truss
The surface of the rack is usually galvanized, and the wiping cloth will reduce the gloss of the metal surface and look old.
If you need to wipe the surface, you can choose a thin and soft cloth for the aluminum alloy stage, which can reduce the scratches of the aluminum truss stage.
After a period of use, due to improper surface cleaning or foreign matter adhesion, rust spots will appear on the aluminum truss stage. At this time, the aluminum alloy stage should pay attention to the anti-corrosion treatment of the truss. After removing the rusty parts, you must spray wax or paint anti-rust paint for maintenance. In addition, some small connecting parts, such as pins and rivets, should be checked regularly, and anti-corrosion and anti-rust measures should be taken.
Of course, for special customized trusses (such as aluminum truss stage surface coating), you can wipe the dirt attached to the surface with clean water, ventilate and dry it, and then store it in a dry warehouse. aluminum truss stage have a wide range of uses. Only by carrying out surface cleaning and anti-corrosion treatment, and accumulating more maintenance knowledge, can it be used for a longer time.
Structural classification of aluminum truss stage
aluminum truss stage is distinguished from its structure, which can be divided into aluminum alloy screw type truss and aluminum alloy quick-insertion type truss. At present, domestic leasing companies generally purchase aluminum alloy screw trusses. With the continuous development of the stage market, the requirements for the speed of steel stage equipment construction are getting higher and higher. Yaona people believe that aluminum alloy quick-insertion truss will gradually Replace aluminum alloy screw truss.
1. aluminum truss stage are widely used in specifications and sizes, including 300*300MM, 400*400MM, 400*500MM, 400*600MM, 520*760MM, 600*760MM.
1. The specific method of using square pipes to fix the truss to build the background wall is as follows:
2. First prepare all the aluminum truss stage and place them on the ground, and then connect the background frames on the ground with screws.
3. Stretch the Polaroid around the background frame;
Generally, the size of 300*300MM is used for small and medium-sized performances, and the two sizes of 400*400MM are more. Large-scale performance activities adopt 520*760MM, 600*760MM, if the span exceeds the super-large span requirement of 30 meters or more.
Welding requirements for aluminum truss stage
For the welding requirements of aluminum truss stage and joints, special welding equipment has been designed and manufactured. According to the welding sequence requirements, a programmable controller is used to control the logical sequence of the welding equipment, and the MIG automatic welding process for inert gas shielded welding of aluminum truss stage aluminum alloy pipes and joints is developed. aluminum truss stage materials are divided into 6061-T6 and 6082-T6. As we all know, aluminum is a relatively soft metal, so the shelf is softer, which means it easily collapses, so hardness is very important. 6082-T6 has better hardness than 6061-T6, and the aluminum truss stage has self-healing ability. The higher the quality, the higher the repair ability. Of course, with the improvement of quality, the price of aluminum truss stage will also increase. What I want to explain here is. Even if the same 6082-T6 or 6061-T6, different aluminum factories will have differences, so the supply of goods is very important to ensure the quality and stability of the hardness of each aluminum frame. Secondly, check the diameter of the main pipe, the thickness of the pipe wall and the thickness of the auxiliary pipe. The main diameter of the aluminum truss stage is 50MM, the tube wall thickness is 3MM, and the auxiliary tube is 50MM. This is the most conventional specification. However, in order to sell at a low price to expand their turnover, some companies have lowered the specifications of the aluminum truss stage tube wall or sub-tube for low-price sales.