[China Aluminum] through consulting related books, consulting relevant technical experts in the aluminum processing industry, summarizing the factors that affect the flatness problem, and based on this, developed a solution to the flatness problem.
1, the use of effective repair mold to improve the flatness of the product is to repair the mold at home and abroad for the flatness of the extrusion material is more commonly used solutions, the advantages of this method is a wide range of applications, basically all of the extrusion material can be used The disadvantage of this treatment method is that it needs to terminate production. After the mold is handled well, it is time-consuming and labor-intensive to retry the mold. It is also not conducive to saving energy and reducing consumption. The poor plane clearance of the plate is mainly related to the uneven flow velocity of the mold. By changing the size or angle of the guide pit, or changing the length of the working belt, the metal flow rate can be effectively adjusted so that the flow velocity is uniform and the plane gap is eliminated. Defects. This type of board generally adopts this method in the early stage of production, and some molds can solve the flatness problem once the mold is repaired. Some molds need three or more times to completely solve the flatness problem. This is not only related to the mold itself, but also The skill level of the moulding workers also has a great relationship.
2. Use off-line finishing to correct the flatness of the product Firstly, according to the characteristics of the specific flatness of the plate, the roller of the offline finisher is reasonably configured, and then the product is subjected to constant adjustment by using a product with an ultra-flatness of the flatness to adjust continuously. The height and position of the roller plate, after the flatness of the product is qualified, the height and position of the roller plate are fixed, and then the batch of products are off-line finished. Off-line finishing is generally time-consuming and laborious, and it also easily affects the appearance of the product. Figure 3 shows an example of off-line finishing of the sheet. The flatness of the plate is convex and concave, and the flatness is very poor. Using the roller as shown in the figure, during the process of passing the roller, the middle part and the edge part of the product will be subject to a certain pressure of the roller. This product serves to correct the plane gap.
3, the use of online finishing to modify the product flatness taking into account the large number of orders, if you use off-line finishing, will greatly reduce the production efficiency and waste a lot of manpower, through a discussion of a certain period of time to explore and combine offline finishing The principle of on-line finishing was put forward and it was decided to make a small online-finishing equipment. If it succeeds, it will not affect the production efficiency and save a lot of manpower. Figure 4 is a schematic diagram of the on-line finishing equipment designed for the plate, which is based on the principle of off-line finishing, in the original extruder outlet guide device based on the installation of the bearing seat and roller, by adjusting the height of the roller and Position to change the pressure on the product to make a certain amount of deformation of the product, so that the flatness of the product within a reasonable range, so as to achieve the purpose of online finishing.
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A flange can also be a plate or ring to form
a rim at the end of a pipe when fastened to the pipe. A blind flange is a plate
for covering or closing the end of a pipe. A flange joint is a connection of
pipes, where the connecting pieces have flanges by which the parts are bolted
together.
Although the word flange generally refers to
the actual raised rim or lip of a fitting, many flanged plumbing fittings are
themselves known as 'flanges':
There are many
different flange standards to be found worldwide. To allow easy functionality
and interchangeability, these are designed to have standardised dimensions.
Common world standards include ASA/ASME (USA), PN/DIN (European), BS10
(British/Australian), and JIS/KS (Japanese/Korean). In the USA, ANSI stopped
publishing B16.5 in 1996, and the standard is ASME B16.5
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