In the steel structure of z profile steel equipment, since the section of the profile is relatively developed, the width-to-thickness ratio of each component plate is often large, and the section is easily convex. Z-shaped steel design allows local instability of the plate, and the strength after the buckling of the plate is one of the important means to bring out the economic benefits of such components. In order to use the material economy, a large allowable stress is usually used under conditions that can be guaranteed and deformed. For light loads, use thin plates, only a part of which acts as an effective section of the strut or beam, allowing it to undergo large deformations when it is in line with our expectations. Thus, a concept of “effective width” characterized by the post-buckling strength of the panel is proposed.
In the concept of effective width, it is considered that when the local buckling stress of the plate has been exceeded, only a part of the width of the plate is effective in bearing the load. This effective area of the plate is near the corners and corners of the stiffeners. In such an area, the stress of the plate will approach or indeed reach the yield strength before the component is broken. If the full-section effective is used to calculate the longitudinal bending moment to cause deflection of the hull, the actual deflection value is larger than the calculated value. If only the plate connected to the stiffener is considered to be effective in the calculation, the portion whose width is equal to 40 to 50 times the thickness of the plate is considered to be effective, and the rib is considered to bear the longitudinal bending moment.
Main use of Z-shaped steel: Cold-formed Z-shaped steel with adjustable size and compressive strength, etc. Advantages of Z-shaped steel. Widely used in automobiles, railway vehicles, building doors and windows, transportation, shelves, electrical cabinets, highway guardrails, construction steel structures, Containers, steel formwork and scaffolding, solar support shipbuilding, bridges, transmission towers, steel sheet piles, cable trays, agricultural machinery, furniture, storage, guide rails, keel steel, vegetable greenhouses, pipeline supports, municipal construction and other fields.
Z-shaped steel is a C-shaped steel with longer service life and constant material resistance and stronger corrosion resistance than ordinary c-shaped steel, and the zinc coating can be significantly improved after being passivated, dyed or coated with a light-protecting agent. Sex and decorative, what are the advantages of Z-shaped steel? 1. It is convenient for mechanical processing, structural connection and device, and easy to remove and reuse. 2. Compared with welded c peofile steel, it can obviously save labor and materials, reduce the cost of raw materials, power and labor, low residual stress, appearance and surface.; 3, C- peofile steel planning personality is sensitive and rich. In the case of the same beam height, the opening of the steel structure can be 50% larger than the opening of the concrete structure, and then the construction is more sensitive;4. The structure is light and heavy. Compared with the concrete structure, the self-weight is lighter, the self-weight of the structure is reduced, the internal force of the structural plan is reduced, the construction root treatment can be low, the construction is simple, and the cost is reduced. 5. The useful construction area is added. Compared with the concrete structure, the steel structural column has a small cross-sectional area, and then the useful area can be added. Depending on the construction method, the useful area can be added 4-6%.
One of the development directions of Z-shaped steel is to continuously meet the needs of various applications and achieve multiple functions on the product. The electric control cabinet column profiles, shelf profiles, etc. are pre-punched before forming. Due to the high hole spacing and hole geometry requirements, the simulation study and control measures of the pre-punching hole shape distortion of the cold bending machine are very important. A new method for controlling the distortion of the hole shape during the cold bending forming process of the cold bending machine was obtained by field experiments. The mechanism of the hole shape distortion was analyzed and the experimental results were summarized.z profile steel supplier
At the same time, the computer simulation software was used to simulate the machining process, and the field experiment results were compared with the computer simulation results. The working principle of Z-shaped steel is mainly to place the steel on the cold bending machine, and after contacting the roller driven by the reducer, the pressing handle is fed tightly to start the motor oil pump set, and the high-pressure oil output by the electric oil pump overflows. Valve, in this process can adjust the required pressure, into the block into the electro-hydraulic valve, with the electro-hydraulic valve and the jog switch control cylinder work, the I-beam and the three support rollers are pressed without bending deformation At the beginning of calculation, the length of the cylinder re-propulsion process is 10mm-15mm each time, and the main motor is turned forward or reversed, and the main motor drives the I-beam to work.