Sheet Metal Fabrication Service Processing steps For Sheet Metal Parts - Custom Sheet Metal Fabrication Service Company
10. Assembly. The so-called assembly is to group multiple parts or components together in a certain way to make them into a complete material. One thing that needs to be paid attention to is the protection of the materials, and no scratches. Assembly is the last step in the completion of a material. If the material cannot be used due to scratches, it needs to be reworked and reworked, which will waste a lot of processing man-hours and increase The cost of the item. So pay special attention to the protection of the item.
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After many new owners buy a new car, they will seal the car under the recommendation of the 4S store. In this regard, there are car maintenance professionals said that to seal the car, can make the car paint high temperature resistant acid and alkali, it is more convenient to maintain.
Do new cars need to be sealed?
Nancheng’s Xiaoxin recently bought a new car. His friend suggested to make the chassis rust-proof and install engine protection plates to seal the whole car. "Does this help the car?" Xiaoxin asked questions.
“When I just bought a car, the 4S shop suggested that the car should be glazed, because my car is a white body, and the white color will gradually turn yellow in the future. After the body is sealed, it can prevent the body from discoloring. A big sum of money, so it has never been done.Now almost two years ago, the original white body has become a bit yellowish, and many of the body's dirt can not be cleaned, need to be polished and waxed to be removed. Now to re-consider Do not seal the glaze once," said the owner, Mr. Li. However, there are owners who think that as long as the engine and other important parts can be maintained, the paint does not need to be so particular about.
Glaze can prevent paint scratches
In this regard, car maintenance professionals Wei master said that the current owners more and more cherish their own car, like sealing glaze treatment, the advantage is that the car paint can be high temperature resistant acid and alkali, will not be ultraviolet radiation and air oxidation It is more convenient to maintain. For some owners who just bought a new car, sealing the car is better than not doing it.
Master Wei also said that to seal the new car, but also look at the car's paint situation, some brand models paint is relatively hard, the first year is not sealed glaze, the problem is not. However, it is still necessary to have a glazed protective paint for vehicles with relatively soft paint. However, Master Wei reminded the majority of car owners that if they had done the sealing for the first time, the second time they had to do it, they must clear away the previous surface before they could do it again.
Glossary: ​​Sealing glaze
Glaze is actually an antioxidant extracted from petroleum by-products. Features are anti-acid, anti-corrosion, high temperature, wear-resistant, washable, high gloss and so on. Sealing glaze is the use of soft wool or sponge through the high-speed vibration and friction shock polisher, the glaze molecules penetrated into the cracks in the paint on the car surface, so as to play a beautiful and protective effect on the paint.
1. Design and draw the part drawing of its sheet metal parts, also known as three views. Its function is to express the structure of its sheet metal parts by means of drawings.
2. Draw an unfolded drawing. That is, unfold a part with a complicated structure into a flat piece.
3. Unloading. There are many ways to unload, mainly the following methods:
a. Shearing machine cuts the material. It uses the shearing machine to cut out the length and width dimensions of the expanded drawing. If there are punching and corner cutting, then the punching machine is combined with the die to punch and corner to form.
b. Punch blanking. It is the use of a punch to punch the structure of the flat part after the parts are unfolded on the plate in one or more steps. Its advantages are short labor hours, high efficiency, and can reduce processing costs. It is often used in mass production.
c. NC CNC blanking. When NC blanking, you must first write a Cnc Machining program. That is, use the programming software to write the drawn expanded diagram into a program that can be recognized by the NC CNC machining machine. Let it follow these programs step by step on a piece of iron plate On the top,punch out the structural shape of its flat parts.
d. Laser cutting is the use of laser cutting to cut the structure and shape of the flat piece on an iron plate.
4. Flanging and tapping. Flanging is also called hole extraction, which is to draw a slightly larger hole on a smaller base hole, and then tap the hole. This can increase its strength and avoid slippage. Generally used for sheet metal processing with relatively thin plate thickness. When the plate thickness is large, such as the plate thickness of 2.0, 2.5, etc., we can tap directly without flanging.
5. Punch processing. Generally, punch processing includes punching and cutting corners, punching blanking, punching convex hull, punching and tearing, punching and other processing methods to achieve processing purposes. Its processing requires corresponding molds to complete the operation. There are convex molds for punching convex hulls, and tearing forming molds for punching and tearing.
6. Pressure riveting. As far as our factory is concerned, pressure riveting studs, pressure riveting nuts, pressure riveting screws, etc. are often used. The pressure riveting method is generally completed by a punch or hydraulic pressure riveting machine. Riveted to the sheet metal part.
7. Bending. Bending is to fold 2D flat parts into 3D parts. Its processing requires a folding bed and corresponding bending molds to complete the operation. It also has a certain bending sequence, and the principle is to make the next cut The first fold that does not cause interference will produce the interference back fold.
8. Welding. Welding is the group welding of multiple parts together to achieve the purpose of processing or the edge welding of a single part to increase its strength. The processing parties generally include the following: CO2 gas shielded welding, argon arc welding, Spot welding, robot welding, etc. The selection of these welding methods is based on actual requirements and materials. Generally speaking, CO2 gas shielded welding is used for iron plate welding; argon arc welding is used for aluminum plate welding; robot welding is mainly in-material It is used when the parts are large and the welding seam is long. Such as cabinet welding, robot welding can be used, which can save a lot of tasks and improve work efficiency and welding quality.
9. Surface treatment. Surface treatment generally includes phosphating film, electroplating colorful zinc, chromate, baking varnish, oxidation, etc. Phosphating film is generally used for cold-rolled plates and electrolytic plates, and its function is mainly to plate on the surface of the material. A protective film is applied to prevent oxidation; the second is to enhance the adhesion of its baking paint. Electroplated multicolored zinc is generally treated with cold-rolled plate surface treatment; chromate and oxidation are generally used for surface treatment of aluminum plates and aluminum profiles; its specific surface The choice of treatment method is based on the customer's requirements.
