Metal fabrication is the creation of metal structures by cutting, bending and assembling processes. It is a value-added process involving the creation of machines, parts, and structures from various raw materials.
Sheet Metal fabrication is the creation of metal structures by cutting, bending and assembling processes. It is a value-added process involving the creation of machines, parts, and structures from various raw materials.
Typically, a fabrication shop bids on a job, usually based on engineering drawings, and if awarded the contract, builds the product. Large fab shops employ a multitude of value-added processes, including welding, cutting, forming and machining.
As with other manufacturing processes, both human labor and automation are commonly used. A fabricated product may be called a fabrication, and shops specializing in this type of work are called fab shops. The end products of other common types of metalworking, such as machining, metal stamping, forging, and casting, may be similar in shape and function, but those processes are not classified as fabrication.
Sheet metal processing is a comprehensive cold-worked post-forming process for thin metal sheets (usually below 6mm), including shearing, punching/cutting/compounding, folding, welding, riveting, splicing, forming (such as automobile bodies), etc. Its remarkable feature is that the thickness of the same part is the same. The products processed by the sheet metal process are called sheet metal parts. The sheet metal parts referred to by different industries are generally different, and are mostly used for assembly. Sheet metal processing is called sheet metal processing. Specifically, for example, the use of plates to make chimneys, iron drums, fuel tanks and oil cans, ventilation pipes, elbows and heads, round places, funnels, etc. The main processes include shearing, bending, bending, forming, welding, riveting, etc.
The materials commonly used in sheet metal processing are cold-rolled sheet (SPCC), hot-rolled sheet (SHCC), galvanized sheet (SECC, SGCC), copper (CU) brass, red copper, beryllium copper, aluminum sheet (6061, 5052, 1010, 1060, 6063, duralumin, etc.), stainless steel (mirror surface, brushed surface, matte surface), according to the different functions of the product, different materials are selected, generally need to consider the use and cost of the product.
1. Cold-rolled sheet SPCC, mainly used for electroplating and baking paint, low cost, easy to form, material thickness ≤ 3.2mm.
2. Hot-rolled sheet SHCC, material T≥3.0mm, also uses electroplating and paint parts, low cost, but difficult to form, mainly flat parts.
3. Galvanized sheet SECC, SGCC. The SECC electrolytic plate is divided into N material and P material. The N material is mainly used for surface treatment, and the cost is high. The P material is used for sprayed parts.
4. Copper; mainly used for conductive materials, and its surface treatment is nickel-plated, chrome-plated, or no treatment, and the cost is high.
5. Aluminum plate; generally use surface chromate (J11-A), oxidation (conductive oxidation, chemical oxidation), high cost, silver plating, nickel plating.
6. Aluminum profiles; materials with complex cross-sectional structures, which are widely used in various sub-boxes. The surface treatment is the same as the aluminum plate.
7. Stainless steel; SUS304 is one of the most widely used stainless steels. Because it contains Ni (nickel), it is richer in corrosion resistance and heat resistance than steel containing Cr (chromium). It has very good mechanical properties, no heat treatment hardening phenomenon, no elasticity . The content of SUS301Cr (chromium) is lower than that of SUS304, and the corrosion resistance is poor. However, after cold working, it can obtain good tensile force and hardness in the stamping process, and has good elasticity. It is mostly used for shrapnel springs and anti-EMI.
Sheet metal has the characteristics of light weight, high strength, electrical conductivity (can be used for electromagnetic shielding), low cost, and good mass production performance. It has been widely used in electronic appliances, communications, automotive industry, medical equipment and other fields. In computer cases, mobile phones, and MP3s, sheet metal is an essential part. As the application of sheet metal becomes more and more extensive, the design of sheet metal parts has become an important part of the product development process. Mechanical engineers must be proficient in the design skills of sheet metal parts, so that the designed sheet metal can meet the requirements of the product. Function and appearance requirements, but also make the stamping die manufacturing simple and low cost
Commonly used equipment for sheet metal processing basically includes Shear Machine, CNC Punching Machine/Laser, Plasma, Water Jet Cutting Machine, Bending Machine, Drilling Machine and various auxiliary Equipment such as: uncoiler, leveling machine, deburring machine, spot welding machine, etc.
Usually, the four most important steps of sheet metal process are shearing, punching/cutting/folding/rolling, welding, surface treatment, etc. The surface treatment of sheet metal parts is also a very important part of the sheet metal processing process, because it can prevent parts from rusting and beautify the appearance of products. The role of the surface pretreatment of sheet metal parts is mainly to remove oil, oxide scale, rust, etc. It prepares for the surface post-treatment, and the post-treatment is mainly spraying (baking) paint, plastic spraying, and anti-rust coating.
1.Cutting 2. Bending 3. Stretching 4. Welding 5. Plastic spraying 6. Inspection 7. Storage.
Definition: It refers to the technology of processing plates of uniform thickness, which does not need to be formed by molds, and the production speed is slow, including blanking, bending, stretching, welding, spraying, assembly, etc., mainly shearing, punching, folding, welding, bonding, etc. step.
mainly punching and laser cutting. The number of punching means is processed by CNC punching machine, and the thickness of the plate is ≤3mm for cold-rolled sheet and hot-rolled sheet, ≤4mm for aluminum sheet, and ≤2mm for stainless steel. There are minimum size requirements for punching, which is related to the shape of the hole, the properties and thickness of the material. Laser cutting is a laser flying cutting process. The thickness of the plate is ≤20mm for cold-rolled and hot-rolled plates, and ≤10mm for stainless steel. The advantage is that the thickness of the processing plate is large, the cutting speed of the workpiece shape is fast, and the processing is flexible.
The bending part has a minimum bending radius. When the material is bent, the outer layer is stretched and the inner layer is compressed in the fillet area. When the thickness of the material is constant, the smaller the inner bending radius, the more serious the tension and compression of the material; when the tensile force of the outer layer exceeds the limit of the material, fracture and fracture will occur.
The radius of the fillet between the bottom of the drawing piece and the straight wall should be greater than the thickness of the plate. The thickness of the material after stretching will change to a certain extent. The center of the bottom generally maintains the original thickness, and the material at the bottom fillet becomes thinner. , the material at the top near the flange becomes thicker, and the material at the rounded corners of the rectangular stretcher becomes thicker.
mainly arc welding and gas welding.
①Arc welding has the advantages of flexibility, maneuverability, wide applicability, and all-position welding; the equipment used is simple, durable, and low maintenance costs. However, the labor intensity is high and the quality is not stable enough, depending on the level of the operator. It is suitable for welding carbon steel, low alloy steel and non-ferrous alloys such as copper and aluminum over 3mm.
②The flame temperature and properties of gas welding can be adjusted. Compared with arc welding, the heat source is wider than the heat affected zone, the heat is not as concentrated as the arc, and the productivity is low. Alloy, cemented carbide, etc.
The surface of the hardware is automatically sprayed with oil and powder through the oven and other machines to make the product look beautiful and meet the needs of packaging and shipping.
The production process of the product is controlled by the quality inspection department in real time to reduce the production loss and defective rate and ensure the production quality.
The products that have gone through the above processes have reached the requirements for warehousing and ready to be shipped, and can be packaged and warehousing.
Computer mainframe chassis, server cabinets, electric control cabinets, TV backplanes, car shells, air conditioner shells, charging pile shells, electrical control cabinets, control boxes, electric boxes, non-standard customized precision CNC sheet metal processing; charging pile boxes, Manufacturing of sheet metal parts for commercial air conditioners and air energy heat pumps; sheet metal processing and spraying for home decoration and display racks; sheet metal processing and spraying for electrical control cabinets, control boxes, and electrical boxes; sheet metal for various electrical and mechanical equipment Processing and spraying of gold shells; design and manufacture of various non-standard sheet metal shells.
In this new era of great changes, many things around us are constantly improving and perfecting. Only technological products that are constantly innovating and changing are more popular. That is to say, our product technology rapid prototyping has a very high speed and efficiency, product production effect is very good. Ming, do not stick together, so how does this rapid prototyping technology compare to traditional technology? Today we’ll take a look.
The rapid prototyping technology adopted by the rapid prototyping device can adapt to the difficulty of manufacturing and processing of various materials in our life, and can obtain excellent materials and structural properties of parts.
As mentioned above, the rapid prototyping technology of materials involves materials, forming methods and structural forms of parts. The essence of rapid prototyping mainly includes the chemical composition of the forming material, the physical properties of the forming material (such as powder, wire or foil) (melting point, thermal expansion coefficient, thermal conductivity, viscosity and fluidity). Only by recognizing the characteristics of these materials can we choose the right material compared with the traditional rapid prototyping technology. What are the characteristics of rapid prototyping technology?
3d printing material rapid prototyping technology mainly includes material density and porosity. In the production process, can meet the performance requirements of molding material microstructure, molding material precision, parts precision and surface roughness, molding material shrinkage (internal stress, deformation and cracking) can meet the specific requirements of various rapid prototyping methods. The precision of the product will directly affect the structure of the product, the roughness of the surface of the product will affect whether there are some defects on the surface of the product, and the shrinkage of the material will affect the precision requirements of the product in the production process.
Rapid prototyping technology for the products produced. It also ensures that there is no big gap between what is produced and what is put on the market. Material rapid prototyping technology mainly includes material density and porosity. In the production process, can meet the performance requirements of molding material microstructure, molding material precision, parts precision and surface roughness, molding material shrinkage (internal stress, deformation and cracking) can meet the specific requirements of various rapid prototyping methods. The precision of the product will directly affect the structure of the product, the roughness of the surface of the product will affect whether there are some defects on the surface of the product, and the shrinkage of the material will affect the precision requirements of the product in the production process.
Mold manufacturing rapid prototyping technology also plays an important role in the increasingly competitive market economy, mold manufacturing rapid prototyping technology also plays an important role, is an important part of the advanced manufacturing technology group. It focuses on computer aided design and manufacturing technology, laser technology and material science and technology, in the absence of traditional mold and fixture, quickly create arbitrary complex shape and have a certain function of the 3D entity model or parts, about the cost of new product development and mold manufacturing, repair. Section is used in aviation, aerospace, automotive, communications, medical, electronics, household appliances, toys, military equipment, industrial modeling (sculpture), architectural models, machinery industry and other fields. In the mold manufacturing industry, the rapid prototyping made by rapid prototyping technology is combined with silica gel mold, metal cold spraying, precision casting, electrocasting, centrifugal casting and other methods to produce molds.
So what are its characteristics? First, it adopts the method of increasing materials (such as coagulation, welding, cementation, sintering, aggregation, etc.) to form the required parts appearance, because of the RP technology in the process of manufacturing products won’t produce waste cause the pollution of environment, so in today’s modern pays attention to the ecological environment, this also is a green manufacture technology. Secondly, it has solved many problems in traditional processing and manufacturing for laser technology, numerical control technology, chemical industry, material engineering and other technologies. The wide application of rapid prototyping technology in China has played a supporting role in the development of manufacturing enterprises in China, enhanced the rapid response ability of enterprises to the market, improved the competitiveness of enterprises, and also made a significant contribution to the national economic growth.
Advantages of 3D printing prototypes
1. With good complex manufacturing capability, it can complete manufacturing difficult to be completed by traditional methods. The product is complex, and only through multiple rounds of design – prototype machine production – test – modification design – prototype machine reproduction – re-test process, through the prototype machine repeated test can timely find problems and correction. However, the output of the prototype is very small, and it takes a long time and high cost to adopt the traditional manufacturing method, resulting in a long development cycle and high cost.
2. Low cost and fast speed of small batch manufacturing can significantly reduce the development risk and shorten the development time. 3D printing ingot casting with planks do not need to traditional manufacturing mode, system, mold and die forging process, can rapid prototype production, low cost, and digital, the entire production process can be modified at any time, at any time, in a short time, a large number of verification test, thus significantly reduce the risk of developing, shorten the development time, reduce the development cost.
3. High material utilization, can effectively reduce the production cost. The traditional manufacturing is “material reduction manufacturing”, through the raw material billet cutting, extrusion and other operations, remove the excess raw materials, processing the required parts shape, the processing process of the removal of raw materials difficult to recycle, the waste of raw materials. 3D printing only adds raw materials where it is needed, and the material utilization rate is very high, which can make full use of expensive raw materials and significantly reduce the cost.
Customized service of products design and manufacturing is our key core capability. Different product customizations have different customization standards, such as partial product customization, overall product customization, partial customization of product hardware, partial customization of product software, and customization of product electrical control. The custom manufacturing and fabrication service is based on a comprehensive understanding of the customer’s product function, material strength, material processing technology, surface treatment, finished product assembly, performance testing, mass production, cost control and other factors before comprehensive evaluation and program design. We provide a complete supply chain solution. Probably your product does not use all the services at the current stage, but we will help you consider the scenario that may be needed in the future in advance, which is what differentiates us from other prototype suppliers.