Metal products processing technology
Metal processing is divided into many different manuals. Now let us analyze in detail the different types of processing. And their required cost and process effect.
casting: refers to the metal being heated to melt, and then poured into the model. Suitable for processing complicated parts.
Sand mold casting: low cost, small batch, can process complex shapes, but may require a lot of post-processing procedures.
Investment casting/lost wax casting: This processing method has high continuity and accuracy, and can also be used to process complex shapes. Under the premise of relatively low processing cost, it can achieve a very perfect surface effect and is suitable for mass production.
Injection casting method: used to process complex shapes with high errors. Due to the characteristics of the process itself, no post-processing is required after the product is formed. However, the advantage of low cost can only be shown in the case of mass production.
Die casting method: The processing cost is high, and the cost is reasonable only in the case of mass production. But the cost of the final product is relatively low and the error is relatively high. It can be used to produce parts with thinner walls.
Spin casting method: It is an ideal method for processing small parts, usually used in jewelry manufacturing. You can use a rubber model to reduce the cost of processing.
Directional solidification: A very strong super heat-resistant alloy with excellent fatigue resistance can be produced, poured into the model, and then subjected to a strictly controlled heating and cooling process to eliminate any small defects
Plastic forming part
Plastic forming processing: refers to the high temperature heating of the formed metal to reshape it, which is labor-intensive production.
Plastic forming processing classification:
Forging: It is one of the simplest and oldest metal molding processes to shape metal by beating and extruding under the conditions of cold working or high temperature operation.
Rolling: The high-temperature metal billet passes through a number of continuous cylindrical rollers, and the rollers pierce the metal into the mold to obtain a preset shape.
Drawing steel wire: A process of drawing metal strips into filaments using a series of drawing dies that gradually become smaller in size.
Extrusion: A low-cost solid or hollow metal molding process with the same cross-sectional shape for continuous processing, which can be used for high-temperature operation and cold processing.
Impact extrusion: A process used to process small to medium-sized parts that do not require chimney taper. Fast production and can process parts with various wall thicknesses. The processing cost is low.
Powder metallurgy: A process that can process ferrous metal components as well as non-ferrous metal components. Including the two basic processes of mixing the alloy powder and pressing the mixture into the mold. The metal particles are formed by high-temperature heating and sintering. This process does not require machining, and the raw material utilization rate can reach 97%. Different metal powders can be used to fill different parts of the mold.
Solid molding processing part
Solid molding processing: refers to the raw materials used are metal strips, sheets and other solid forms that can be molded at room temperature. It belongs to labor-intensive production. Processing cost input can be relatively low.
Solid molding processing classification
Spinning: A very common processing method used to produce circular symmetrical parts, such as plates, cups and cones. During processing, the high-speed rotating metal plate is pushed close to the model on the fixed lathe that also rotates to obtain a pre-set shape. The process is suitable for production in various batches.
Bending: An economical production process for processing any form of sheet, rod and tube materials.
Continuous rolling and forming: the metal sheet is fed between the pressure rollers to obtain a metal shape with continuous length and uniform cross-section. Similar to the extrusion process, but the wall thickness of the processed component is limited, and only a single wall thickness can be obtained. Only under the premise of mass production, the processing cost is the most reasonable.
Stamping and forming: The metal sheet is placed between the male mold and the female mold and then press-formed. It is used to process the hollow shape, and the depth can be deep or shallow.
Punching: The process of punching and cutting a certain shape on a metal sheet with special tools, which can be applied to large and small batch production.
Punching: Basically similar to the punching process, the difference is that the former uses the punched part, while the latter uses the remaining part of the metal sheet after punching.
Cutting: Cutting metal sheets by cutting is the same as cutting the paper from the best position with a pair of scissors.
Chip forming: When cutting metal, the cutting method with chip production is collectively called chip forming, including milling, drilling, lathe processing, grinding, sawing and other processes.
No chip molding: Use existing metal strips or metal sheets for molding. No chips are generated. Such processes include chemical processing, corrosion, electrical discharge processing, sandblasting, laser cutting, water jet cutting, and thermal cutting.