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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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.
The localization of major equipment of major projects has been re-opened.
On April 8, Sichuan Zigong High-Pressure Valve Co., Ltd. celebrated a historic moment as the company’s gates were adorned with banners and firecrackers echoed through the air. Three trucks carrying 19 sets of China's first large-diameter all-welded forged steel pipe ball valves slowly moved out, heading eastward toward the Huaiyang-Wuhan pipeline construction site. This marked a significant milestone—the first time that domestically produced equipment was used in the West-East Gas Pipeline Project. It demonstrated that China has now achieved international standards in the manufacturing of such critical valve technology.
The Huaiyang-Wuhan Pipeline is a key branch of the larger West-East Gas Pipeline, stretching about 460 kilometers. According to Wang Yijian, Deputy Manager of the project department, an all-welded pipeline ball valve is installed every 30 to 50 kilometers along the main pipeline. Due to the high-pressure environment, these valves require extremely advanced materials and manufacturing techniques. Before this development, similar valves had to be imported from abroad.
Zigong High Pressure Valve Co., Ltd., part of the Sichuan Haojia Group, has over 40 years of experience in valve production. The company is a leader in domestic valve technology, known for its strong R&D capabilities. In 2001, it took on a national key project to develop large-diameter all-welded forged steel ball valves. The company invested heavily in acquiring advanced manufacturing technologies from U.S. firm GE New Billund and Italian welding equipment. This enabled them to design and produce specialized valves for pipelines and industrial applications.
In March 2002, Zigong successfully developed Asia’s first 40â€-600 LB fully welded forged steel ball valve, which passed rigorous inspections by AQSIQ and the China Machinery Industry Federation. By June 2002, the company made headlines when it became the only domestic manufacturer capable of producing large-diameter all-welded ball valves for the West-East Gas Pipeline. Competing against six foreign companies, including Cameron and Grove, Zigong managed to reduce costs and save valuable foreign exchange. The company was later honored with the "Outstanding Contribution to the West-East Gas Transmission" award.
The all-welded forged steel ball valve represents the pinnacle of modern valve technology and reflects the future direction of the industry. With a service life exceeding 30 years, these valves are widely applicable in petrochemical plants, urban gas networks, and oil and gas pipelines. This breakthrough not only enhances China’s technological independence but also strengthens its position in global energy infrastructure.