Metal Machining

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Pinjin factory is a precision 5 axis cnc machine shop capable of Cnc machining metal parts to customer specification (conventional and 5 axis machining).
We can machine to print and accept the most common file formats including: .dwg .SLDPRT,dxf .iges .step .sat as well as .pdf files. If you don’t see your file format here let us know.Please send us files to: [email protected] can accept both small and large run working of custom machined parts.We can provide 17 kinds of metal processing technology:

The Planing Machining Of Metal Parts

It is a cutting method that uses a planer to make a horizontal relative linear reciprocating motion on the workpiece, which is mainly used for the shape processing of parts. The precision of planing processing is IT9~IT7, and the surface roughness Ra is 6.3~1.6um.

The Grinding Of Metal Parts

Grinding refers to the processing method of removing excess material on the workpiece with abrasives and abrasive tools. Grinding is one of the most widely used cutting methods.

cnc milling

Milling is suitable for many different features, including threading, chamfering, slotting, etc. This allows for producing complex designs on a single CNC milling centre with enviable accuracy.

Selective laser melting

In a tank filled with metal powder, a computer-controlled high-power carbon dioxide laser selectively sweeps the surface of the metal powder. Wherever the laser goes, the metal powder on the surface is completely melted and bonded together, and the powdery state remains where it is not illuminated. The whole process needs to be carried out in a sealed chamber filled with inert gas.

Selective Laser Sintering

The SLS method uses an infrared laser as an energy source, and the modeling materials used are mostly powder materials. During processing, the powder is first preheated to a temperature slightly lower than its melting point, and then the powder is flattened under the action of a leveling stick; the laser beam is selectively sintered according to the layered section information under computer control, and one layer is completed. Then the next layer of sintering is carried out, and after all the sintering is completed, the excess powder is removed, and a sintered part can be obtained. 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.

Metal deposition

Similar to “squeeze cream” style fused deposition, but instead sprays metal powder. While spraying metal powder materials, the nozzle also provides high-power laser and inert gas protection. This will not be limited by the size of the metal powder box, and can directly manufacture larger volume parts, and it is also very suitable for repairing partially damaged precision parts.

Roll forming

The roll forming method uses a series of continuous stands to roll stainless steel into complex shapes. The sequence of rolls is designed so that the roll profile of each stand continuously deforms the metal until the desired final shape is obtained. If the shape of the part is complex, up to thirty-six racks can be used, but for parts with a simple shape, three or four racks are sufficient.

Die forging

It refers to a forging method that uses a die to form a blank on a special die forging equipment to obtain a forging. The forgings produced by this method are accurate in size, small in machining allowance, complex in structure and high in productivity.

Die cutting

That is, the blanking process, the film formed in the previous process is positioned on the male die of the punching die, the excess material is removed by clamping the die, and the 3D shape of the product is retained to match the mold cavity.

Die-cutting process-knife die

In the die cutting process, the film panel or circuit is positioned on the bottom plate, the die die is fixed on the template on the machine, and the force provided by the machine’s downward pressure is used to control the blade to cut the material. It is different from the punching die in that the incision is smoother; at the same time, by adjusting the cutting pressure and depth, the effects of indentation and half-break can be punched out. At the same time, the low-cost operation of the mold is more convenient, safe and fast.

Centrifugal casting

It is a technology and method for injecting liquid metal into a high-speed 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, according to the shape, size and production batch of the casting, can choose non-metallic mold (such as sand mold, shell mold or investment shell mold), metal mold or coating layer or resin sand layer in the metal mold. of casting.

Lost foam casting

It is to bond and combine paraffin or foam models similar in size and shape to castings into model clusters. After brushing with refractory paint and drying, they are buried in dry quartz sand for vibration modeling, and poured under negative pressure to vaporize the model and liquid metal. A new casting method that occupies the position of the model and forms a casting after solidification and cooling. Lost Foam Casting is a new process with nearly no margin and precise forming. This process does not require mold taking, no parting surface, no sand core, so the casting has no flash, burr and draft angle, and reduces the number of mold cores due to core loss. Dimensional error caused by combination.

Squeeze casting

Also known as liquid die forging, molten metal or semi-solid alloy is injected directly into an open mold, and then the mold is closed to generate a filling flow to reach the outer shape of the part, and then high pressure is applied to make the solidified metal (shell). ) produces plastic deformation, the unsolidified metal is subjected to isostatic pressing, and high-pressure solidification occurs at the same time, and finally the method of obtaining a part or blank is direct squeeze casting; and indirect squeeze casting refers to passing molten metal or semi-solid alloy through The punch is injected into the closed mold cavity, and high pressure is applied to make it crystallize and solidify under pressure, and finally the method of obtaining the product or blank.

Continuous casting

It is a casting method in which liquid metal is continuously poured into one end by a through mold, and the molding material is continuously pulled out from the other end.


It is a plastic processing method that uses external force to act on the front end of the drawn metal to pull the metal blank from the die hole smaller than the blank section to obtain products of the corresponding shape and size. Because drawing is mostly carried out in a cold state, it is also called cold drawing or cold drawing.


It is a forming and processing method in which a workpiece (stamping part) of the required shape and size is obtained by applying external force to the sheet, strip, pipe and profile by means of a press and a die to cause plastic deformation or separation.

Metal injection

Molding (Metal Injection Molding, MIM for short) is a new type of powder metallurgy near-net forming technology derived from the plastic injection molding industry. As we all know, plastic injection molding technology produces various complex shapes at low prices. In order to improve its performance, metal or ceramic powder can be added to the plastic to obtain products with high strength and good wear resistance. In recent years, this idea has evolved to maximize the solids content and completely remove the binder and densify the green body during the subsequent sintering process. This new powder metallurgy forming method is called metal injection molding.

CNC Turning

It means that lathe processing is part of mechanical processing. Lathe machining mainly uses turning tools to turn the rotating workpiece. Lathes are mainly used to process shafts, discs, sleeves and other workpieces with revolving surfaces, and are the most widely used type of machine tool in machinery manufacturing and repair factories. Turning is a method of cutting a workpiece on a lathe using the rotation of the workpiece relative to the tool. The cutting energy of turning is mainly provided by the workpiece rather than the tool.

Turning is the most basic and common cutting method and plays a very important role in production. Turning is suitable for machining rotary surfaces. Most workpieces with rotary surfaces can be processed by turning methods, such as inner and outer cylindrical surfaces, inner and outer conical surfaces, end faces, grooves, threads, and rotary forming surfaces. The tools used are mainly turning tools.

Are you already thinking of availing metal machining service? We can be a good services. We are a team of skilled professionals, who have a huge experience in providing quality metal CNC machining services. To know more about our services, please get in touch with our experts today. You can reach out to us both, via phone, as well as email. Give us a call on +86 15118255600, or simply mail us your requirements at [email protected].

Don’t forget the original intention, and always have to go. I have been engaged in the fabrication industry for 40 years. I have been engaged in the research of mechanical engineering. I have deep feelings for the mechanical fabrication industry. I hope to export China’s excellent supply capabilities through the BE-CU platform, so that the world can enjoy it. Parts manufacturing service with good quality, accurate delivery time and excellent price. At the same time, we are also working hard to explore how to promote the progress of the industry, and assume our mission-to make manufacturing smarter with technology and innovation!

Leonard Chou And Pinjin Founder