17 Common Metal Forming Processes, How Much Do You Know About Machining?


1. Planing is a cutting method in which a planer is used for horizontal relative linear reciprocation on a workpiece, and it is mainly used to shape parts. The planing process accuracy is IT9~IT7, and the surface roughness Ra is 6.3~1.6μm.

17 Common Metal Forming Processes, How Much Do You Know About Machining?

2. Grinding - Grinding refers to a machining method using abrasives and abrasive tools to remove excess material from a workpiece. Sanding is one of the most common cutting methods.

17 Common Metal Forming Processes, How Much Do You Know About Machining?

3. Selective laser melting. In a tank covered with metal powder, a computer controls a high-power carbon dioxide laser beam that selectively passes over the surface of the metal powder. Where the laser light falls, the metal powder on the surface completely melts and combines, and the place where the laser does not shine remains in a powder state. The whole process must be carried out in a sealed cabin filled with an inert gas.

17 Common Metal Forming Processes, How Much Do You Know About Machining?

4. Selective Laser Sintering - The SLS method uses infrared lasers as energy sources and most of the modeling materials used are powder materials. In the processing process, the powder is first pre-heated to a temperature just below its melting point, and then by the action of the scraper stick, the powder is deposited, the laser beam selectively sinters according to the information of the layered area under computer control, and one layer is ready. Then proceed to the next layer of sintering, remove excess powder after all sintering and then you can get a sintered part. At present, the mature process materials are wax powder and plastic powder, and the process of sintering with metal powder or ceramic powder is still under study.

17 Common Metal Forming Processes, How Much Do You Know About Machining?

5. Metal spraying - somewhat similar to "creamy" welding, but the metal powder is sprayed. When spraying metal powder materials, the nozzle also provides protection against powerful laser and inert gas. Therefore, it will not be limited by the size of the metal powder box, and can directly produce larger volume parts, and is also very suitable for repairing partially damaged precision parts.

17 Common Metal Forming Processes, How Much Do You Know About Machining?

6. Profiling. The profiling method uses a set of continuous stands to roll stainless steel into complex shapes. The sequence of rolls is designed in such a way that the roll profile of each stand sequentially deforms the metal to the desired final shape. If the shape of the part is complex, up to thirty-six posts can be used, but for simple parts, three or four posts are sufficient.

17 Common Metal Forming Processes, How Much Do You Know About Machining?

7. Stamping - refers to the forging method, in which forgings are obtained by forming blanks with dies on special stamping equipment. Forgings produced by this method have precise dimensions, small machining allowances, complex structure and high productivity.

8. Die-cutting, i.e., the cutting process. The film formed in the previous process is placed on the punch die, excess material is removed by closing the mold, and the three-dimensional shape of the product is maintained to fit the mold cavity.

9. Die Cutting Process - Knife Mold - The process of cutting the knife mold, placing the film panel or circuit on the bottom plate, fixing the knife mold on the top template of the machine, and using the force provided by the machine to press down to control the blade to cut the material. It differs from a punching die in that the incision is smoother, while at the same time, by adjusting the pressure and depth of cut, dents, half-cuts and other effects can be punched. At the same time, the mold cost is low, and the operation is more convenient, safer and faster.

10. Centrifugal casting is a technology and method of injecting liquid metal into a rapidly rotating mold so that the molten metal fills the mold and forms a casting under the action of centrifugal force. The mold used in centrifugal casting can be non-metal (such as sand mold, shell mold, or investment shell), metal mold, or coated with paint or resin sand in a metal mold, depending on the shape, size, and production batch. castings.

11. Lost wax casting is the bonding and joining together of paraffin or foam patterns similar in size and shape to the castings to form a pattern cluster. After being treated with refractory paint and dried, they are buried in dry quartz sand for vibration molding. Negative pressure pouring is a new casting method in which the model is vaporized, liquid metal takes the position of the model, solidifies and cools to form a casting. Investment casting is a new technology, almost no stock and precise molding. This process does not require mold taking, separation surface and sand core. Size errors caused by the combination.

12. Die casting, also known as liquid die forging, involves injecting molten metal or a semi-hard alloy directly into an open mold and then closing the mold to create a filling flow to reach the outer shape of the workpiece, and then applying high pressure which causes plastic deformation solidified metal (sheath) and the non-hardened metal is subjected to isostatic pressure, thereby solidifying under high pressure, and finally, a method for obtaining a workpiece or workpiece, The above-mentioned direct extrusion casting, as well as casting withindirect extrusion A method of injecting molten metal or semi-hard alloy into a closed mold cavity through a punch and applying high pressure to crystallize and solidify it under pressure, and finally obtain a product or blank.

13. Continuous casting – A casting method in which molten metal is continuously poured into one end of a through-mould and molding material is continuously drawn from the other end.

14. Drawing is a method of processing plastics, in which an external force acts on the front end of the drawn metal to draw a metal workpiece from a die hole smaller than the cross section of the workpiece, to obtain products of the appropriate shape and size. . Since drawing is mainly carried out in a cold state, it is also called cold drawing or cold drawing.

15. Stamping is the use of presses and molds for applying an external force to plates, strips, pipes and profiles for the purpose of plastic deformation or separation in order to obtain blanks (stamped parts) of the required shape and size. .

16. Metal injection molding (metal injection molding, referred to as MIM) is a new type of near-pure molding powder metallurgy technology derived from the plastic injection molding industry. Molded products, but the strength of plastic products is not high. To improve its performance, metal or ceramic powder can be added to plastics to obtain products with higher strength and good wear resistance. In recent years, this idea has evolved to maximize solids content and completely remove the binder and densify the molded body during subsequent sintering. This new powder metallurgy molding method is called injection molding.

17. Turning refers to turning that is part of machining. Turning mainly uses turning tools to turn rotating workpieces. Lathes are mainly used for machining shafts, discs, bushings and other workpieces with rotating surfaces and are the most widely used type of machining in machine building and repair enterprises. Turning is a method of machining a workpiece on a lathe using the rotation of the workpiece relative to the tool. The cutting energy in turning operations is mainly provided by the workpiece, not by the tool.

Turning is the simplest and most common cutting method and plays a very important role in manufacturing. Turning is suitable for rotating surfaces. Turning can process most workpieces with rotating surfaces, such as inner and outer cylindrical surfaces, inner and outer conical surfaces, ends, grooves, threads, and rotating forming surfaces.tools are mainly turning tools.