High Precision CNC Machining in China

What is CNC?

CNC precision machining involves shaping raw materials into finished products by cutting excess parts specified by computer-aided design (CAD) or computer-aided manufacturing (CAM) blueprints. What's more, machinists use this process on different manufacturing processes and on different materials.

Before any product can be manufactured by precision CNC machining, it is necessary to make a blueprint of the product using a CAD or CAM program. That said, these programs make highly detailed 3D outlines and precise machining processes must be followed to successfully reproduce the product.

From toys to medical devices, automobiles or space shuttles, any product with parts requires precision machining. The process uses computer numerical control (CNC) equipment to utilize actions such as cutting, milling, turning and electrical discharge machining to obtain the final product.

While the process requires the supervision of a skilled machinist, machines do most of the work automatically. Computer-aided design (CAD) software creates the design, and computer-aided manufacturing (CAM) software turns it into manufacturing instructions for the machine. The final post-processor software encodes the instructions into information that the machine can understand. Machinists then load the instructions into the CNC equipment to begin the manufacturing process.

CNC Parts Machining

Precision Machining Tolerances

Although precision CNC machining tools are very precise, these machines cannot reproduce the dimensions of a product as accurately as in a CAD blueprint. Therefore, machinists use tolerances.

Tolerances are the acceptable deviations in part dimensions from general standards. Its synonym is dimensional accuracy. All precision CNC machining processes do not have standard tolerances. How tight the tolerances are depends on the manufacturing process. The number of decimal places in the tolerance value indicates how strict the measurement is.

CNC Milling: 

CNC milling is suitable for machining the irregular parts. The parts are highly adaptable and flexible, and can machining parts with particularly complex contour shapes or difficult to control dimensions.

CNC Milling

CNC Turning: 

CNC turning can machining round or cylindrical parts. Not only can these parts be manufactured quickly and accurately, but they also have excellent repeatability. It can also be used for a variety of cutting, including drilling, boring, threading and knurling.

CNC Turning

CNC Drilling :

Drilling is a precision machining process that uses a rotating multi-point drill to create a cylindrical hole in a raw material/workpiece. Additionally, the design of the drill allows chips on the workpiece to fall off, keeping the drilled hole clean.

CNC  Drilling

CNC Precision Machining Application

Precision machining is gradually gaining more support in manufacturing due to its versatility, cost and time efficient process. Precision machining processes are used in the following industries:

Automotive Industry

As automotive companies come up with new innovations to add to their latest iteration of vehicles, they need to develop prototypes of these parts before adding them to the production line. CNC precision machining is responsible for developing these prototypes to exact specifications. The technology also makes parts for other transportation vehicles such as ships, transport trucks and more.

Aerospace Industry

From transport planes to space shuttles, aerospace vehicles require very precise devices, as a single error can lead to serious damage to different aircraft. CNC precision machining processes are responsible for manufacturing many parts for this industry, such as landing gear ports, bushings, manifolds, airfoils, etc.

Medical Industry

Medicine is rapidly evolving as the need for new devices emerges. In addition to producing new equipment, they need a lot of existing equipment. Precision CNC machining is responsible for manufacturing this equipment. Examples of such devices include orthopedic devices, safety enclosures, implants, MRI machines, research equipment, etc.

Military and Defense Industry

CNC has never been more important, as different countries have different designs for new munitions and defense systems. Precise machining processes are responsible for bringing all these designs to life using a variety of materials and processes. Examples of equipment manufactured for this industry include aircraft components, transportation components, communication components, munitions, and more.

Advantages of High Precision CNC Machining

Using these high-precision machines in your manufacturing process will certainly bring many advantages. Some are:

Reduce Manufacturing Cost

For the price, CNC machining is the way to go, especially if you want to make a few to a hundred parts. The process requires less upfront costs than injection molding costs (due to the expense of creating the mold).

Accelerate

CNC machines offer higher speeds compared to injection molding. Unlike injection molding, which can take months to create a mold and ensure a part is within tolerance, CNC machining can produce parts in a matter of weeks.

Allows for Fast and Cost-Effective Prototyping

With CNC machining services, your prototyping will be more efficient. This is because there are many cost-effective materials available for CNC, so you don't have to spend a lot on prototypes. Of course, when prototypes are made faster, the entire production process is faster. At Kesu, we deliver prototypes that meet manufacturing requirements and quality standards.

The above are just some of the most common materials used in precision CNC machining. Kesu offers hundreds of materials to meet your custom prototyping and production needs. To see a full list of our materials, upload your design to get an instant quote in minutes and start your project today!

How to Do Precision Machining

Material

Precision CNC machining can machine a wide variety of materials. At Kesu, we provide you with material certification upon request. Here are some examples of the metals and plastics we offer certification:

Metal

Aluminum (6061-T651 aluminum, 6061-T651 aluminum, 5052-T651 aluminum, 7075-T651 aluminum,6082-T651 aluminum,etc.) 

Stainless steel (201, 301, 303, 304, 316, etc.)

Steel (1008, 1018, 1020, etc.)

Brass (280, 260, 2680, etc.)

Copper

Bronze

Titanium

Zinc

Plastic

ABS

Acrylic

POM

The above are just some of the most common materials used in precision CNC machining. Kesu offers hundreds of materials to meet your custom prototyping and production needs. To see a full list of our materials, upload your design to get an instant quote in minutes and start your project today!

Zinc

Programming

Before starting the precision machining process, the machine must be programmed so that the process runs smoothly without any errors. To do this, follow this process:

After computer-aided design (CAD) software creates a 2D vector or 3D solid blueprint of the product to be manufactured, it is exported to a CNC-compatible file format such as STEP or IGES.

Computer-aided manufacturing software (CAM) then generates digital programming code that is used to control the tool and produce custom-designed parts.

There are two main programming codes: G-code and M-code. G-code is more popular and is called geometry code. It tells the machine when, where and how to move. M codes are auxiliary function codes that control the auxiliary functions of the machine tool.

Machining

Once the machine is programmed, the next step is to start machining the raw material to meet the exact specifications of the finished product. Depending on the product, quite a few processes are used in obtaining the final product. Examples include:

a. CNC milling machine

b. CNC turning

c. CNC drilling

Surface Treatment:

Surface treatment: polishing, grinding, brushing, sandblasting, anodizing, painting, electroplating, silk screen, micro-arc oxidation, etc. Metal alloys respond well to a variety of surface finishes. Some of the more common. CNC machined alloy metal surface finishes are listed below.

Electroplating:

Electroplating is the surface treatment of metal alloy castings plated with copper, nickel, chromium, silver, gold and other metal layers with decorative effects by electrochemical methods. Metal plating is often used to help prevent oxidation of its outer surface while maintaining electrical and thermal conductivity. In particular, precious metal plating such as silver or gold plating can provide low contact resistance to maintain excellent electrical conductivity and solderability.

Painting:

Metal is easy to paint as long as it is properly pre-treated first. There are various ways to make paint adhere better to zinc surfaces. These materials include phosphate conversion coatings or zinc chromate-vinyl butyral primers. Once the surface is prepped, painting is simple.

Sandblasting:

Sandblasting is the use of mechanical shot blasting to treat the surface of metal alloy castings and plastic castings to produce an occlusal or gritty surface.

Polishing: Polishing is the mechanical polishing of metal alloy castings to a mirror finish.

Powder Coating:

Powder coating creates a solid surface finish and is typically between 0.006 (0.1524 mm) and 0.012 (0.3048 mm) thick. Electropolishing can further improve corrosion resistance without compromising electrical conductivity.

Advantages of CNC machining

Using these high precision machines in your manufacturing process will certainly provide many advantages. 

Lower Production Costs

In terms of price, CNC precision machining is a good option, especially if you want to manufacture a few to a hundred parts. The process requires lower upfront costs compared to the cost of injection molding (due to the cost of creating the molds).

Increased Speed

Compared to injection molding, CNC machines offer higher speeds. Unlike injection molding, which can take months to create molds and ensure that parts are within tolerance, CNC machining can produce parts in a matter of weeks.

Consistent machining quality, high machining accuracy and repeatability.

Types of CNC Machine Tools:

Precision 3-Axis Machining

Kesu’s Group has great advantage on the 3-Axis machining service. At present, Kesu Group boast 50 sets of 3-axis machines. We have rich experience on the 3-Axis machining. Since it can only be cut on three axes, the processing speed may also be slower than four-axis or five-axis CNC, because the workpiece may need to be manually re-positioned to obtain the desired shape.

Three-Axis Machining

Simultaneous 4-Axis Machining Service

4-axis machining or 4-axis milling is fantastic and cost-efficient when machining complex parts. As 4-axis machining can work as both CNC turning and CNC milling machine. 4-axis CNC service has great advantage on the spiral parts, polyhedral parts, spiral lines and cylindrical cams etc.  The 4-axis simultaneous machining service is one of the biggest advantages of Kesu Group.  At present, Kesu Group invested in 20 more 4-axis machines, which was 80 in the past. We have considerable experience on the 4-axis machining, especially in the impeller and the embossing roller of face mask machine.

Four-axis CNC machining will the best choice, if you need to drill holes on the side of a part or on the curved surface of a cylinder. It will speed up the machining process greatly and which will also remain high machining accuracy.

Four-Axis Machining Products

Simultaneous 5-Axis Machining Service

Simultaneous 5-Axis Machining Service is the high-end CNC machining solution, which is suitable for the complex and difficult parts. Five-axis simultaneous machining is one of the biggest advantage of Kesu Hardware Group. At Kesu Hardware, we focus on 5-axis machining services for complex and high precision parts. Such as engine parts for automotive, impeller for rocket, areoplane, boat and cars etc. 

Five-Axis Machining Products

Simultaneous 6-Axis Machining Service

6-Axis CNC Machining can reduce the production time greatly compared with 5-axis machining. The 6-axis simultaneous machining service is the promotion direction of Kesu Group. Currently, Kesu Group has 2 machines to provide 6-axis simultaneous machining services. Traditionally, 6-axis simultaneous machining means that all 6 axes could do simultaneous machining. This 6-axis simultaneous machining which we are talking about is based on the 5-axis simultaneous machining. It's Turn & Mill compound machining with the new ultra-compact patented turn-mill spindle compact MASTER. This machine could provide 6-sided complete machining by main spindle up to 700 Nm and optional counter spindle. In this way, the machine could provide 6-axis simultaneous machining.

Cooperation Process

1. Contact us with the drawings of your products.

Files formats are accepted when clients send us drawing.

3D: Pro/E, UG

2D: Auto CAD

Accepted file format: .igs, .prt, .stp, .x_t, .dxf, .dwg, .pdf, .jpg, .tif, .bmp, .doc, .xls.

2.  Receive our offer.

We will send you the quotation sheet as soon as possible.

3.  Place the orders

4.  Make payments.

5.  Engineers write programs for products.

6.  Production.

Machining types: CNC milling, CNC turning, grinding, stamping, bending, welding, die casting, drilling, tapping and injection molding.

CNC machining range:

Aluminum: 6061, 6063, 6061-T6, 7075, 5052, 2017, 6083.

* Steel: Q215,Q235,10# 15#, 45#, S136, SKD11,718H.

* Copper/brass / bronze.

* Titanium / TC4.

* Plastic: Delrin (POM), Teflon, Nylon, PA, PC, PMMA, Ultem (PEI), PTFE.

* Stainless steel: 303, 304, 316, 430, 420.

Surface treatment: laser engraving LOGO, Anodizing, Sandblasting, Plating chrome, Plating nickel, RoHS zin, Assembly, Welding, Heat treating, and so on.

7.  QC checks the quality of machinery machining parts.

8.  Packing.

9.  Delivery.

For more information and consultation, contact us here!

Email:Pearl@kesugroup.com

Tel: +86 18897461780