What is grating Visit: 879
1. Grating definition - Types and uses
Grating is a grid that can be produced from various materials and designs, depending on the type of application. The primary materials used in gratings can be of metal type, such as steel, aluminum and others. ... and non-metallic materials such as composite, fiberglass ... This product is used in various fields such as flooring, protective panel, access paths, staircases, industrial or urban canals, false ceilings, lighters Construction, bridges, passages and ... can be used.
Major applications of gratings are in places where high strength, along with visibility of the space behind the components are considered, such as oil platforms or other oil and gas projects, petrochemicals, refineries, water, electricity, refiners, textile factories, food and chemical industries , Automotive, hydro, wind and atomic power plants, damming, fish farming, marine industries, shipbuilding and ...
Grating consists of two main parts:
1. Bearing bar
Bearing belts are the determining factor in the strength and gravity of a grid (grating), and the holders have the only fixed role to keep these straps and maintain the arrangement of the structure within its framework. Therefore, the shape and density, or The arrangement of cross bars will not play a role in the bearing tolerance of the structure, and it only affects the weight and appearance of the structure.
The most important factor in bearing tolerance is the width of the bearing belt network, so that the higher the load on the grating is, the more should be used with wider belts.
The preservatives can be considered from different types such as straps, half belt, round corners and four spokes, which are used in the production of grating using a four-side sprocket or rebar electrophoresis.
2. Production of grating - Review of production methods (traditional - modern)
The gratings of the crossbar bearings bar can be of different types, such as straps, half belt, rebar, or four spokes. The difference between the two traditional and modern methods is the same with regard to all the raw materials, in the method of attaching the retainers to the bearing belts.
In the traditional method, the manufacturing process is such that, in order to attach the retainers to the bearing belt, first, to create the required space for holding on the belt rods, they create a slot or several holes, and after placing the holders in the insertion points The joints are fixed to keep them firm with the help of welding. This method is completely non-standard and only one of the most obvious failures is the operator's error. In this case, attention is given to two points: one is to reduce the load bearing capacity of the main belt (bearings) by creating multiple grooves along it and The other is uneven and uneven connections which, due to the very high error rate of the operator during operation, will have a very high effect on reducing the coefficient of structural strength. In addition to these disadvantages, the great disadvantage that appears in applications with high humidity conditions is the lack of complete coverage The structure is completely covered with various coatings such as galvanized. This is due to the fact The presence of cracks and pores resulted from the creation of a groove in nonlinear straps and welds preventing the penetration of the coating materials completely in all structural parts. Such rusting events of steel parts and consequently extinction and premature deterioration The structure will follow.
In contrast to metal gratings (gratings) in a new and standardized electroforming method, it overwhelms these problems and in most cases it can be said to have completely eliminated. Among these, there can be no lowering of load bearing capacity of belts due to lack of Multiple grooves or holes along the strap (for mounting the retainers) and the uniformity of all joints on the surface of the structure. Also, full coverage of the parts by different coatings due to lack of porosity and cracking caused by the groove or Manual welding is another of these. Another advantage of the electrically conductive gratings compared to its handheld ones is the lighter weight versus the load bearing capacity and the higher strength of these structures.
In the production of gritting by electroforming, one of the primary requirements for production is the use of high quality raw materials that are homogeneous and homogeneous. All strips used in the electroforming of gratings should be considered in terms of thickness, dimensions and Other quantitative and qualitative parameters are completely uniform in all points, otherwise the flow of electric current is not uniform at all points, which prevents the uniform melting of the points of connection across the grid and in practice disrupts the grating production. Slowly
This is important while grating in the traditional way is not required to comply with these requirements, and it may be possible to use waste materials, each of which has different dimensions and quality parameters, to be used together.
Another advantage of electroforming grating is the production of high-dimensional panels. Panels of 6 * 1 m or more. If the grating production in a traditional way can not produce such dimensions, because keeping the whole Bearing belts of more than a certain value are in fact inoperative and straps are subject to curvature and bending. This ability is generated by the feeding of a perfectly uniform and fixed load bearing to the electroforming machine when it is produced. This ability Can be used in grating design and application in various projects