CNC Precision Mchining Services | All You Need to Know

What is CNC Precision Machining?

CNC precision machining usually refers to computer digital control precision machining, CNC machining lathes, CNC machining milling machines, CNC machining boring and milling machines, etc. Our skilled staff controls CNC precision machined tools with the help of sophisticated digital systems. CNC or Computer Numerical Control allows extremely specific control over the positioning, speed, coordination, feed rate, and other precision aspects of the manufacturing process for a specific part or object. CNC machines for automatic pallet shuttles reduce cycle time to manufacture parts, thereby increasing throughput for our customers. CNC precision machining can produce many types of complex parts with high precision, machines, and tools that can be controlled by CNC machining, including lathes, grinders, and milling machines.

CNC Precision Machining manufactured by YIJIN Hardware

CNC precision machining is the process of cutting various materials to specifications. This process often involves removing excess from metal parts and reshaping them to high tolerance levels. More simply, precision machining reshapes a large block of material into smaller, more delicate parts. Precision CNC machining produces items of all sizes that we use every day. In fact, all the tools and everyday household products you use require some level of invaluable mechanic skills. Of course, tools or machines that have worn out often require machine calibration, grooving, or welding by a precision mechanic. Precision machining is part of every industry and technology, from the production of automobiles and medical equipment to hair tools and kitchen appliances.

Yijin Hardware Co., Ltd

YIJIN Hardware is a senior manufacturer specializing in CNC precision machining. It has many years of experience in the machining industry. The company has advanced CNC machining centers, five-axis linkage machining centers, four-axis linkage machining centers, and three-axis linkage machining centers. The machining accuracy can reach ±0.005mm. The company also has more than ten sets of high-precision CNC turning centers and professional testing equipment (five-axis three-coordinates, which can realize the precision turning of shaft and disc parts, and the testing is one of the powerful precision processing factories in Shenzhen. Supports processing of various titanium, titanium alloy, aluminum, stainless steel, and copper materials. The company has a complete pre-sales and after-sales service system, providing customers with one-stop processing services, ensuring the quality and quantity customers pursue products! Welcome customers to customize with drawings and samples!

custom cnc precision spare manufactured by YIJIN Hardware

What Is CNC Precision Turning and Milling?

CNC turning and milling services are an excellent solution for creating parts with complex shapes and high dimensional tolerances while providing a cost-effective solution for short-run production. CNC precision milling can produce virtually any 2D or 3D shape where the material is easily reached by a rotating cutting tool.

CNC Precision Machining Advantages

  • The number of tooling is greatly reduced, and complex tooling is not required to process parts with complex shapes. If you want to change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.
  • The processing quality is stable, the processing precision is high, and the repeatability is high, which is suitable for the processing requirements of aircraft.
  • The production efficiency is high in the case of multi-variety and small batch production, which can reduce the time for production preparation, machine tool adjustment, and process inspection, and reduces the cutting time due to the use of the optimal cutting amount.
  • It can process complex profiles that are difficult to process by conventional methods and even process some unobservable processing parts.
  • The arrangement of the working steps is more detailed because the problems that do not need to be considered in the processing technology of ordinary machine tools, such as the arrangement of working steps in the process, the tool setting point, the tool changing point, and the determination of the processing route, etc. It cannot be ignored when processing.
  • CNC machining has high efficiency, high machining accuracy, low labor intensity, and strong adaptability to different workpieces.

custom cnc precision brass parts manufactured by YIJIN Hardware

What Kind of Parts Is Suitable for CNC Precision Machining?

First of all, CNC machining is suitable for most precision parts machining in aviation, marine, automotive, medical, industrial, and other fields. CNC machining has high precision, fast efficiency, and stable quality.

The CNC machining center is controlled by numerical control programming, and the machining program is programmed in advance and put into the CNC operating system. It is processed by the operator according to the process. Machine tools are further divided into ordinary CNC machining centers, 3-axis, 4-axis, 5-axis, and compound machining centers.

The CNC machining center can perform multi-axis linkage processing of precision parts with complex structures, and can also make metal prototypes or plastic prototypes for R&D companies for new products in the R&D stage for reference.

The CNC machining center can process aluminum profiles, stainless steel, zinc alloy, acrylic, ABS, and various plastic raw materials. High compatibility. The process can be divided into fine turning, fine boring, fine milling, fine grinding, grinding, and post-processing.

custom cnc precision spare parts manufactured by YIJIN Hardware

Process Classification

Fine tuning and fine boring: Many precision light alloy parts are processed by this method (aluminum alloy or magnesium alloy), and the coordinate accuracy can reach ±2 microns.

Fine milling: It is used to process aluminum or beryllium alloy structural parts with complex shapes. It relies on the precision of the guide rail and spindle of the machine tool to obtain a high mutual position accuracy. Using a carefully ground diamond cutter head for high-speed milling can obtain precise mirror surfaces.

Fine grinding: used for machining shaft or hole parts. Most of these parts are made of hardened steel with high hardness.

Grinding: Use the principle of mutual grinding of mating parts to selectively process the irregular convex parts on the machined surface, and the accuracy can be as high as ±0.01mm.

Precision Parts Processing Requirements for Material Applications

For precision part machining, not all materials can be precision machined. Certain materials that are too hard to exceed the hardness of the machined part may damage the part. Therefore, unless these materials are machine parts made of special materials or laser cut, they are not suitable for precision machining.

custom cnc precision machining part manufactured by YIJIN Hardware

The materials for precision parts processing are divided into two categories, metal materials, and non-metal materials.

Generally speaking, for metal materials, stainless steel has the highest hardness, followed by cast iron, followed by copper, and finally aluminum. The processing of ceramics, plastics, etc. belongs to the processing of non-metallic materials.

  1. The first is the requirement for the hardness of the material. On some occasions, the higher the hardness of the material, the better. It is only limited to the hardness requirements of the machined parts. The material to be processed cannot be too hard. If it is harder than the machined parts, it will be impossible to process.
  2. Secondly, the material is moderately soft and hard, at least one grade lower than the hardness of the machine. At the same time, it also depends on the function of the processing device is, and the reasonable selection of materials for the parts.
  3. In short, precision machining still has some requirements for materials, and not all materials are suitable for processing. For example, for materials that are too soft or too hard, the former is not necessary to be processed, while the latter cannot be processed.

Therefore, the most basic one is to pay attention to the density of the material before processing. If the density is too high, it is equivalent to a high hardness, and if the hardness exceeds the hardness of the machine (lathe turning tool), it cannot be processed.

Not only will it damage the parts, but it will also cause danger, such as the turning tool flying out and hurting people. Therefore, in general, for mechanical processing, the material quality should be lower than the hardness of the machine tool, so that it can be processed.

custom cnc precision part manufactured by YIJIN Hardware

There are many kinds of machining methods, and each machining method needs to have process requirements. According to the basic processing methods of mechanical parts, such as feeding, bending, stretching, forming, and welding, we need to use each machining method. Pay attention to their crafting requirements.

According to different processing methods, blanking can be divided into general punching, digital punching, shearing machine cutting, laser cutting, and air cutting.

Due to different processing methods, the processing technology of blanking is also different. The mechanical cutting methods are mainly digital punching and laser cutting. The advantages of laser cutting are that the thickness of the processed sheet is large, the cutting speed of the workpiece shape is fast, and the processing is flexible.

The disadvantage is that it cannot be processed at one time, the mesh parts should not be processed in this way, and the processing cost is high.

The welding methods of machining plants mainly include arc welding, plasma arc welding, gas welding, pressure welding, fusion welding, electroslag welding, and brazing. The welding of mechanical products is mainly arc welding and gas welding.

Arc welding has the advantages of flexibility, mobility, wide applicability, all-position welding, simple equipment, good durability, and low maintenance costs, but it is labor-intensive and the quality is not stable enough, which depends on the level of the operator. The flame temperature and properties of gas welding can be adjusted, and the heat source of arc welding is wider than the heat-affected zone, the heat is not as concentrated as the arc, and the productivity is low.

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