Problems in the construction of steel structure manufacturers
In the process of producing steel structure manufacturers, the quality problems are more likely to occur, and it is very difficult to deal with them. The quality of the general process of the proportion of small. In the above construction process, the special process of welding, painting, the important process of cutting, assembly.
1 welding procedure. The process of hidden works, is one of the most vulnerable process quality problems, the quality of the products from the display statistics in 2004 of a company, the quality problems occurred during the process of welding repair: because the weld quality caused by high rate of more than 80%, followed by the weld quality problems accounted for 10% due to technical problems on the road. Order and improper operation of the operator, this problem belongs to the main problems of engineering quality direct impact, so this type of problem must be detected by the company's professional detection using professional tools can be detected and evaluated, according to the general types of defects in the weld seam is divided into slags, dissolve and gas.
2 painting process. The process is also a hidden process, the impact of the structure is less than the impact on the building function. It is also easy to produce quality problems. The quality problem of process is mainly manifested in the large area film on the surface of component loss and partial loss, produce sagging off, component surface coating, coating thickness is not enough, the film thickness distribution is uneven, the color of color film.
3 setting out the blanking process. This process belongs to the components processing before leading, its quality has a direct impact on the next step, and even lead to blanking parts are discarded, this situation is very common, so before next material to strengthen the quality control process is very important and necessary. The quality problem of the process is mainly manifested in: for long and thin plate type parts deformation in cutting more powerful; because of cutting gas or plate internal slag and the component distribution caused by uneven cutting surface pattern, horse tooth knot, cutting mark depth standard; cutting or sawing parts without considering the subsequent contraction caused by deformation of the parts size exceed the standard; due process documentation errors of batch parts scrapped; cutting the size of seriously exceeded the standard requirements.
4 assembly process. This process plays an important role in the quality of component processing, and its quality is influenced greatly by the upper process. The quality problems in the process of the assembly parts is mainly manifested in the wrong place, such as 3450mm as 4350mm; parts of the use of error should be 2# assembly parts and components, assembly is 3# other parts; parts in the correct position on the assembly errors, such as holes on the 45mm plate was out, and the actual at 45mm installed; parts assembly clearance assembly over standard and technical documents, clearance 7mm 3mm; some parts without correction of the assembly, after the completion of the assembly has no way to eliminate the distortion caused by cutting deformation; the operator parts hole position size exceed the standard plan without authorization; no welding area surface treatment; the assembly drawing size error caused by the error.
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