In recent years, the global aerospace industry has made remarkable achievements, which cannot be separated from the important support of CNCM machining technology. As an efficient and high-precision machining method, CNCM technology is increasingly widely used in the aerospace field, which provides a strong guarantee for the performance improvement of aerospace equipment.

According to international market research institutions, the global aerospace market size will maintain steady growth in the next decade and is expected to reach about $200 billion by 2028. In China, the size of the aerospace market is also continuing to expand and is expected to reach about 250 billion yuan by 2026. In this context, the application of CNCM machining technology in the aerospace industry is particularly important.

It is understood that CNC machining technology in the aerospace field can produce accurate, precise, complex parts, such as aircraft engines, turbine blades, aircraft structural parts, etc. These components need to have high accuracy and stability to ensure the safety and performance of aerospace spacecraft. According to relevant data, the global aerospace parts market is expected to reach about $12 billion by 2026.

In addition, the high efficiency of CNC machining technology in the aerospace field has also been widely used. In the assembly process of large aerospace spacecraft such as aircraft and rockets, CNC machining technology can achieve rapid and mass production and improve production efficiency. According to statistics, the global aerospace assembly market size is expected to reach about $60 billion by 2026.

In terms of materials, the compatibility of CNC machining technology in the aerospace field has been fully reflected. With the increasing application of new materials in the aerospace field, such as carbon fiber composite materials, titanium alloys, etc., CNC machining technology can realize the efficient processing of these materials to ensure the performance and quality of parts. According to statistics, the global aerospace materials market size is expected to reach about $35 billion by 2026.

It is worth mentioning that CNC machining technology also supports the manufacture of customized parts in the aerospace sector. This is of great significance for the manufacture of aerospace spacecraft in special scenarios. According to statistics, the global aerospace custom parts market size is expected to reach about $2.5 billion by 2026.

In summary, the application of CNCM machining technology in the aerospace industry provides a strong guarantee for the performance improvement of aerospace equipment. In the context of the rapid development of China's aerospace industry, the importance of CNC machining technology is self-evident. With the continuous expansion of the aerospace market, the application prospect of CNC machining technology in the aerospace industry will be broader. We have reason to believe that CNC machining technology will continue to help the prosperity of aerospace industry.

Now many industries of precision parts will use CNC machining production, but after CNC machining is completed, many products surface is still relatively rough, this time you need to carry out secondary surface finishing treatment.

First of all, surface treatment is not suitable for all CNC processing products, some products can be directly used after processing, and some need to be hand-polished, electroplating, oxidation, radium carving, screen printing, powder spraying and other special processes. Here are some things you should know about surface treatment.

1, improve product accuracy; After the product processing is completed, some products have a rough surface and leave a large residual stress, which will reduce the accuracy of the product and affect the precision of the match between the parts. In this case, the product surface treatment is required.

2, provide product wear resistance; If the parts usually use scenarios are interacting with other parts, long-term use will increase part wear, which also requires processing of the product surface to extend the service life of the parts.

3, improve the corrosion resistance of the product; Parts used for a long time in highly corrosive places require special surface treatment, requiring polishing and spraying of anti-corrosion materials. Improve corrosion resistance and service life of the product.

The above three points are the prerequisites for surface processing after CNC precision parts processing, and several surface treatment methods will be introduced below.

01. What is electroplating?

Electroplating refers to the surface engineering technology of obtaining a solid metal film on the surface of the substrate by electrolysis in a salt solution containing the metallized group, with the metallized group as the cathode and the metallized group or other inert conductor as the anode under the action of direct current.

02. Why electroplate?

The purpose of electroplating is to improve the appearance of the material, while giving the surface of the material a variety of physical and chemical properties, such as corrosion resistance, decorative, wear resistance, brazing and electrical, magnetic, optical properties.

03. What are the types and applications of electroplating?

1, galvanized

The galvanized layer is of high purity and is an anodic coating. The zinc layer plays a mechanical and electrochemical protective role on the steel matrix.

Therefore, galvanized layer is widely used in machinery, hardware, electronics, instruments, light industry and other aspects, is one of the most widely used plating species.

2. Copper plating

The copper coating is a cathode polar coating, which can only play a mechanical protection role on the base metal. The copper plating layer is usually not used as a protective decorative coating alone, but as the bottom or middle layer of the coating to improve the adhesion between the surface coating and the base metal.

In the field of electronics, such as through hole copper plating on printed circuit boards, as well as hardware technology, crafts, furniture decoration and other fields.

3. Nickel plating

Nickel plating layer is a negative polarity protective layer, which only has a mechanical protection effect on the base metal. In addition to the direct use of some medical devices and battery shells, the nickel-plated layer is often used as the bottom or middle interval layer, which is widely used in daily hardware, light industry, home appliances, machinery and other industries.

4. Chrome plating

The chromium-plated layer is a negative polarity coating, which only plays a mechanical protection role. Decorative chrome plating, the bottom layer is generally polished or electrodeposited bright coating.

Widely used in instruments, meters, daily hardware, household appliances, aircraft, automobiles, motorcycles, bicycles and other exposed parts. Functional chrome plating includes hard chrome plating, porous chrome, black chrome, opal chrome and so on.

Hard chrome layer is mainly used for various measuring calipers, gauges, cutting tools and various types of shaft, loose hole chrome layer is mainly used for cylinder cavity piston failure; The black chrome layer is used for parts that need a dull surface and wear resistance, such as aviation instruments, optical instruments, photographic equipment, etc. Opalescent chromium is mainly used in various measuring tools.

5. Tin plating

Compared to the steel substrate, tin is a negative polar coating, while compared to the copper substrate, it is an anode coating. The tinning layer is mainly used as the protective layer of thin plate in the can industry, and most of the malleable iron skin is made of iron plate tinning. Another major use of tin coatings is in the electronics and power industries.

6, alloy plating

In a solution, two or more metal ions are co-precipitated on the cathode to form a uniform fine coating process called alloy plating.

Alloy electroplating is superior to single metal electroplating in crystal density, porosity, color, hardness, corrosion resistance, wear resistance, magnetic conductivity, wear resistance and high temperature resistance.

There are more than 240 kinds of electroplating alloys, but less than 40 kinds are actually used in production. It is generally divided into three categories: protective alloy coating, decorative alloy coating and functional alloy coating.

Widely used in aviation, aerospace, navigation, automobile, mining, military, instruments, meters, visual hardware, tableware, Musical Instruments and other industries.

In addition to the above, there are other chemical plating, composite plating, non-metal plating, gold plating, silver plating and so on.

The surface of the items processed by CNC machining or 3D printing is sometimes rough, and the surface requirements of the products are high, so they need to be polished.

Polishing refers to the use of mechanical, chemical or electrochemical action to reduce the surface roughness of the workpiece in order to obtain a bright, flat surface processing method.

Polishing can not improve the dimensional accuracy or geometric accuracy of the workpiece, but for the purpose of obtaining a smooth surface or mirror gloss, and sometimes to eliminate gloss (extinction).

Several common polishing methods are described below:

01. Mechanical polishing

Mechanical polishing is by cutting, plastic deformation of the surface of the material to remove the polished convex and smooth surface polishing method, the general use of whetstone strip, wool wheel, sandpaper, etc., mainly manual operation, surface quality requirements can be used to super-fine polishing method.

Super finishing polishing is the use of special grinding tools, in the polishing liquid containing abrasive, tightly pressed on the workpiece to be machined surface, for high-speed rotation. This method is often used in optical lens molds.

02. Chemical polishing

Chemical polishing is to dissolve the microscopic protruding part of the surface of the material in the chemical medium preferentially than the concave part, so as to obtain a smooth surface.

The main advantage of this method is that it does not require complex equipment, can polish the workpiece with complex shape, and can polish many workpieces at the same time, with high efficiency.

The core problem of chemical polishing is the preparation of polishing liquid.

03. Electrolytic polishing

The basic principle of electrolytic polishing is the same as that of chemical polishing, that is, the surface is smooth by selectively dissolving small protruding parts on the surface of the material.

Compared with chemical polishing, the effect of cathode reaction can be eliminated and the effect is better.

04. Ultrasonic polishing

The workpiece is put into the abrasive suspension and placed together in the ultrasonic field, and the abrasive is ground and polished on the workpiece surface by relying on the oscillation of the ultrasonic wave.

Ultrasonic processing macroscopic force is small, will not cause workpiece deformation, but tooling production and installation is more difficult.

05. Fluid polishing

Fluid polishing relies on high-speed flowing liquid and the abrasive particles it carries to wash the surface of the workpiece to achieve the purpose of polishing.

Common methods are: abrasive jet processing, liquid jet processing, hydrodynamic grinding and so on. Hydrodynamic grinding is driven by hydraulic pressure to make the liquid medium carrying abrasive particles flow through the surface of the workpiece at high speed.

The medium is mainly made of special compounds with good flow under low pressure and mixed with abrasives, which can be silicon carbide powder.

06. Magnetic grinding polishing

Magnetic grinding and polishing is the use of magnetic abrasive under the action of magnetic field to form an abrasive brush, grinding the workpiece.

This method has the advantages of high processing efficiency, good quality, easy control of processing conditions and good working conditions.

The above are 6 common polishing processe.

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"CNC machining often has many advantages. From the perspective of automotive, aerospace and consumer applications, it is widely used in the manufacturing of components in these fields. And, in a way, it has similar properties to metal."

Polyformaldehyde, or POM, is a fascinating plastic resin that is widely used in various industrial fields. The aerospace, automotive and electronics industries are important consumers of this polymer. The processing of polyformaldehyde, especially when used in the manufacturing field, can achieve fast and efficient processing. In addition, it benefits users due to its high mechanical strength, stiffness, machinability and variety of grade choices.

This article contains the following key details of POM CNC machining, as well as its basic characteristics in terms of functions, applications, advantages, etc. Let's get started.

POM, a homopolymer, is also known as Delrin. It is widely adopted as an engineering grade thermoplastic for manufacturing prototypes for industrial use. It usually comes in two forms: copolymers or homopolymers. From complex prototypes to flexible machine parts, it brings economic benefits to manufacturing.

Product designers can benefit from its structural integrity, color diversity and stiffness characteristics. In addition, its reliability and resilience in wet environments make it suitable for Marine, medical and aerospace applications. POM, usually has some other name, such as; Acetal (acetal), polyacetal (polyacetal), polyformaldehyde, etc.

POM formaldehyde or polyacetal has significant advantages when used in machining. Benefit from leading technologies such as precision machining POM or CNC machining; For example; Milling, drilling, punching and punching. In addition, its versatility in various grades is very beneficial for machining experts. Delrin is also compatible with advanced cutting technologies; Examples include laser cutting and extrusion processes.

Some of the main features of CNC machining include:

1. It is lightweight, wear-resistant and has low friction properties.

2. POM's low friction capability means it can be used in high-precision rotating parts, such as automotive bushings, bearings and gears.

3. POM is similar to acrylic because of its inherent optical transparency and crystallinity.

4. Delrin comes in a variety of textures, colors and grades.

5. POM CNC machining is essential for high volume production and runs efficiently.

6. It has a lower heat absorption rate compared to other grade polymers such as nylon and polyethylene.

7. Evolved into CNC POM prototyping, CNC machining plays a key role in prototyping.

8. Delrine or POM is also known as metallic plastic or super steel because of its high rigidity and strength.

9. POM can be efficiently milling, drilling, grooving and cutting with CNC machining.

10. Manufacturers can use it for a variety of applications such as aerospace, automotive and consumer goods.

11. Design engineers can benefit from its dimensional stability and achieve tighter tolerances of ±0.0005 inches.

12. Rapid prototyping with CNC machining is feasible.

13. CNC lathes are also available for POM machining.

14. It describes low-cost solutions and offers economic benefits when produced in large volumes.

15. POM is a common technique; For example; CNC machining, injection molding, and 3D printing.

16. Prototypes and complex geometric shapes are easier to manufacture with POM CNC machining.

POM numerical control machining method

 

Plastic CNC machining can be deployed through various technologies; For example; CNC milling, CNC drilling, lathes, grinding, blanking and punching. Its ease of processing greatly affects its use in these processes. In addition, it has also received a lot of attention for its high elongation. Now, let's discuss the method to get the best results POM CNC machining.

The process begins with computer-aided design and programming to improve accuracy, quality, and optimization levels. After the virtual configuration, the instructions are forwarded to the CNC machine in the following form: G code for further processing prospects.

A cutting operation is then performed on the workpiece material (POM) to obtain the optimal dimensions and dimensions. It is recommended to use coolant when machining Delrin at high speed to prevent ineffective processing operations such as chip buildup or overheating.

The following are some of the techniques commonly used to process strong polyformaldehyde or POM.

1.POM CNC milling

CNC milling is often used to machine POM parts. Tools with sharp edges help to get the best Angle, as well as surface finish. Therefore, it is reasonable to use a single slot milling cutter to process Delrin. These cutters prevent chip buildup during machining operations.

2.POM CNC drilling

Standard twist and center drills are best suited for processing polyformaldehyde resins. These materials have strong, sharpened edges that ultimately allow for smooth milling operations on Delrin. The optimal cutting speed of the drilled POM must be approximately 1500rpm and the lip torsion Angle 118°.

3.POM CNC turning

POM CNC turning operation is similar to brass turning operation. The best results can be achieved by maintaining high speed turning at the same rate as the medium feed rate. In order to prevent interference and excessive chip accumulation problems, a chip-breaker must be used for precision turning operations.

4. Blanking and punching

Blanking and stamping, both methods are preferred for small and medium-sized complex parts. During operation, cracks in the sheet can lead to major problems of improper processing. To eliminate this problem, it is best to preheat the Delrin plate and use a manual or high punch.

Highlights: "During POM CNC machining, it is important to keep the POM tight or hold the POM and use a hard steel or carbide tool.

The two most common acetal grades are very useful for CNC machining; Polyformaldehyde resin 150, polyformaldehyde resin; 100 (AF). Let's evaluate their compatibility;

1. Delrin 150

Derlin 150 belongs to the acetal homopolymer family. It has high mechanical strength, stiffness and wear resistance. Thanks to these unique features, it is ideal for CNC machining of gears, bushings, gaskets and automotive interior and exterior finishes. In addition, its stability under high temperature conditions makes it ideal for irrigation and conveyor parts.

2. Delrin 100(A)

Delrin 100 A is integrated with polytetrafluoroethylene (PTFE) for enhanced mechanical stability and viscosity. It is widely used in gear systems or components that require low friction characteristics. In addition, it has strong moisture and chemical resistance. In addition, it eliminates the self-lubricating (oil or grease) characteristic, making it different from other Delrin grades.

The desired surface finish plays a key role in the machining process. When it comes to surface treatment, two options are usually employed: machining and sandblasting. Here is a brief introduction to these;

After processing

CNC machining often leaves a bumpy surface or texture on the surface of the acetal part. When rough or textured parts are needed to improve the frictional properties of the parts, the surface treatment is preferred. The typical roughness range that can be achieved by machining is about 32 to 250 microinches (0.8 to 6.3 microns).

Pearl burst

In most cases, machining tools leave marks on acetal parts. Sandblasting is often used to prevent tool marks and enhance the visual effect of Delrin machined parts. It works by releasing glass beads or fine particles onto the surface of machined parts under high pressure. In addition, it improves durability and provides a valuable, smooth, matte, aesthetically pleasing and satin-polished appearance to polyformaldehyde resin machine parts.

There are other techniques; For example; Anodizing, polishing, painting and stamping. However, most design engineers prefer the above two options due to economic feasibility.

However, there are huge benefits to using Delrin for CNC machining. Besides, it also has some disadvantages. Here are Delrin's limitations;

Adhesion: Although acetal has excellent chemical resistance, it often presents challenges in bonding with strong adhesives. To overcome this problem, designers may need to employ post-treated surface options for best results.

Thermal sensitivity: Thermal sensitivity is a noteworthy issue for design manufacturers. The ability of acetone alcohols to withstand high temperature conditions is very significant. However, it is well suited for applications where mechanical stability is critical. But in some cases, when it is exposed to high temperature conditions, there will be deformation or distortion problems. Compared with nylon, nylon shows higher strength and structural strength even in harsh environments.

High flammability: The processing of polyformaldehyde resin faces the challenge of flammability. It is sensitive to temperatures above 121 degrees Celsius. It is recommended to always use a coolant, such as air coolant, to maintain the temperature during the processing operation. In order to overcome or control flammability problems, it is also necessary to use A Class A fire extinguisher when processing POM.

From automotive interiors to aerospace components, Drin is used in a wide range of applications. Let's take a look at some of its key applications in manufacturing;

Medical industry

POM is an important material for medical components or equipment. As an engineered thermoplastic, it meets the strict quality standards of the FDA or ISO. Its applications range from enclosures and housings to complex functional components; For example; Disposable syringes, surgical tools, valves, inhalers, prosthetics and medical implants.

Automobile industry

Derlin supplies a wide range of automotive components to the automotive industry. Its high mechanical strength, low friction, and wear resistance allow engineers to use it to make important car, motorcycle, and electric vehicle parts. Some common examples include: articulated housings, locking systems, and fuel transmitter units.

Consumer appliances

When it comes to convenient applications, polyformaldehyde processing describes several significant benefits. Manufacturing experts use it to make zippers, cooking utensils, washing machines and clips.

Industrial machinery parts

Derlin's great strength enables it to be used in industrial parts manufacturing. Its ability to withstand wear and low friction characteristics makes it ideal for components such as springs, fan wheels, gears, housings, scrapers and rollers.

As an industry pioneer, Honscn is always at the forefront of market developments. We know that in the fierce market competition, only by constantly honing ourselves can we create indestructible competitiveness. Therefore, we adhere to technological innovation and integrate scientific management into every production link to ensure that every step is accurate. We not only focus on the pulse of the domestic market, but also in line with international standards, with a global perspective to examine the industry trend, grasp the pulse of The Times. With an open mind, embrace the world, with excellent quality, win the future!

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