With the rapid development of science and technology, CNC machining technology is increasingly widely used in the medical industry. Its high precision, efficiency and compatibility provide a strong guarantee for the manufacture of medical devices and equipment.

According to statistics from international market research institutions, the global medical device market is increasing year by year and is expected to reach about 520 billion US dollars by 2025. In China, the scale of the medical device market is also continuing to expand, and is expected to reach 160 billion yuan by 2023. In this context, the application of CNC machining technology in the medical industry is particularly important.

CNC machining can process a wide range of materials, from metals and alloys to ceramics. Nevertheless, there are some requirements for medical equipment and devices. Depending on the specific use of the part or product, the material must be biocompatible or approved as medical grade.

It is understood that CNC machining technology can produce accurate, precise and complex surgical instruments, such as minimally invasive surgical instruments and endoscopes. These instruments need to have high accuracy and stability to ensure safety and effectiveness during the surgical procedure. According to relevant data, the global surgical device market is expected to reach about $5 billion by 2024.

In addition, the application of CNC machining in the manufacture of artificial joints, implants and orthopedic devices also provides patients with more treatment options. According to statistics, the global artificial joint market size is expected to reach about $12 billion by 2024. The advantages of CNC machining technology in the manufacturing of medical equipment components have also been fully utilized. The core components of high-end medical equipment, such as medical pumps, CT and MRI scanners, benefit from the high precision, high efficiency and reliability of CNC machining technology.

In terms of biocompatible materials, the compatibility of CNC processing technology and medical device manufacturing has also been widely recognized. According to statistics, the global market for biocompatible materials is expected to reach about $5.5 billion by 2024. 

It is worth mentioning that CNC machining technology also supports the manufacture of customized medical parts. This is of great significance for the treatment of rare diseases and rehabilitation of special patients. According to statistics, the global market for customized medical parts is expected to reach about $4.5 billion by 2024.

In summary, the application of CNC machining technology in the medical industry provides a strong guarantee for the improvement of the performance of medical devices and equipment. In the current era of rapid development of science and technology, we have reason to believe that CNC machining technology will play a greater role in the medical industry to help the prosperous development of China's medical cause. With the continuous expansion of the medical device market, the application prospect of CNC machining technology in the medical industry will be broader.

Today's machining industry, traditional machining equipment has been unable to meet the quality needs. CNC machine tool equipment replaces ordinary machine tools, and automatic processing equipment such as precision CNC machining and CNC lathe processing replaces traditional machine tools. The following will take you to understand the advantages of CNC machining machine tools and the order of precision mechanical parts processing.

In the process of machining mechanical parts, CNC machining machine tools have the following advantages:

1.CNC machining center has high precision and high processing quality.CNC machine tools are renowned for their exceptional precision and accuracy.  They use computer-controlled movements and specialized software to perform tasks with minimal error margins.  Unlike human operators, CNC machines consistently reproduce identical parts to exact specifications.

2.CNC machining parts can be multi-coordinate linkage, can process complex shape parts.CNC machine tools offer remarkable flexibility and versatility compared to traditional manual machines.  With the ability to change tooling and adapt to various operations quickly, they are ideal for manufacturing complex and intricate components.

3.CNC machining process change, generally only need to change the numerical control program, can save production preparation time.CNC machine tools offer remarkable time-saving benefits.  Traditional manual machining methods are time-consuming and labor-intensive, requiring extensive set-up and constant manual adjustments.  In contrast, CNC machines can be easily programmed to perform complex operations accurately, greatly reducing production lead times.And CNC machining machine tool itself has high precision, large rigidity, can choose a favorable processing amount, high productivity (generally 3 to 5 times of ordinary machine tools).

4.CNC machining belongs to CNC machining equipment, high degree of automation, can reduce labor intensity.Although the initial investment in CNC machine tools may be higher than manual machines, they offer substantial long-term cost savings.  These machines reduce labor costs since they require fewer operators for operation and supervision.  Moreover, CNC machines minimize material wastage by executing precision cuts and reducing human errors, leading to significant material savings.

5.Increased Productivity and Efficiency.One of the most significant advantages of CNC machine tools is their ability to increase productivity and efficiency. These machines can operate around the clock, minimizing production downtime and maximizing output.  Once programmed, they can perform complex tasks with minimal supervision, freeing up manpower for other critical areas of production.

CNC machine tools have ushered in a new era of production efficiency, accuracy, and cost-effectiveness.  With precision, productivity, flexibility, cost savings, time-saving advantages, and the right skillset, businesses can harness the full potential of CNC machines and stay ahead in the competitive manufacturing industry.

Each processing method has its processing sequence. Our operators need to process in accordance with its processing order, but not disorderly, so that it will have a certain impact on the processed products, or quality problems. Precision machining is one of them, then the order of precision mechanical parts processing is divided into what kinds.

The arrangement of fine parts processing should be based on the structure and blank situation of the parts, as well as the needs of positioning clamping, and the focus is on the rigidity of the workpiece is not destroyed.

• The processing of the previous process can not affect the positioning and clamping of the next process, and the processing process of general fine parts in the middle of the cross should also be considered comprehensively;
• Stop the inner cavity processing sequence first, and then stop the outer shape processing process;
• The process of processing with the same positioning, clamping method or the same knife is best connected and stopped to reduce the number of repeated positioning, the number of tool changes and the number of moving platen. Shenzhen Machining;
• In the same device to stop multiple processes, should be arranged first to the workpiece rigid damage process.

Tool concentration sorting method: It is divided into processes according to the tool used, and all the parts that can be completed with the same tool are processed. In the second knife, the third knife to complete the other parts they can complete. This can reduce the number of tool changes, shorten the idle time, reduce unnecessary positioning errors.

Processing parts sorting method: On the processing content of a lot of parts, according to its structural characteristics will be processed local dividends several parts, such as internal shape, shape, surface or plane. Ordinary first processing plane, positioning surface, after processing holes; First processing simple geometric shapes, then processing complex geometric shapes; The parts with lower precision are processed first, and then the parts with higher precision requirements are processed.

In short, the current precision machinery parts processing technology is very advanced, high quality and high production efficiency.

HONSCN Precision has 20 years of cnc machining experience. Specializing in cnc machining, hardware machinery parts processing, automation equipment parts processing. Robot parts processing, UAV parts processing, bicycle parts processing, medical parts processing, etc. It is one of the high-quality suppliers of cnc machining. At present, the company has hundreds of cnc machining centers, grinding machines, milling machines, high-quality high-precision testing equipment, to provide customers with precision and high-quality cnc spare parts processing services.

With the increasingly updated processing technology, CNC machining has also undergone a lot of changes. Many experts pointed out that in the future, CNC will be the mainstream processing mode. In the CNC machining process, the tool is the most important, today, we will understand the CNC tool in detail.

A tool is a tool used for cutting in mechanical manufacturing. Generalized cutting tools include both cutting tools and abrasive tools. The vast majority of knives are used for machines, but there are also hand tools. Since the tools used in mechanical manufacturing are basically used to cut metal materials, the term "tool" is generally understood as a metal cutting tool. The cutting tools used for cutting wood are called woodworking tools.

Tool classification

Cutting tools can be divided into five categories according to the form of the workpiece machined surface.

Cutting tools for processing various outer surfaces, including cutting tools for processing various outer surfaces, including turning tools, planing knives, milling cutters, outer surface broach and file, etc.

Hole processing tools, including drill, reaming drill, boring cutter, milling cutter and internal surface broach, etc.

Thread processing tools, including tap, die, automatic opening thread cutting head, thread turning tool and thread milling cutter.

Gear processing tools, including hob, gear shaper cutter, shaving cutter, bevel gear processing tool, etc.

Cutting tools, including inserted circular saw blade, band saw, bow saw, cutting tool and saw blade milling cutter, etc.

In addition, there are combination tools.

Tool structure

The structure of various tools is composed of a clamping part and a working part. The clamping part and working part of the overall structure of the tool are done on the tool body; The working part of the tool (the tooth or blade) is mounted on the tool body.

The clamping part of the tool has two kinds of holes and handles. The tool with hole relies on the inner hole set on the spindle or mandrel of the machine tool, and transmits the torsional torque with the help of the axial key or the end key, such as the cylindrical milling cutter and the sleeve face milling cutter.

The tool with the handle is usually rectangular handle, cylindrical handle and conical handle three kinds. Turning tools, planing tools, etc. are generally rectangular handles; The conical handle withstands the axial thrust with the taper and transmits the torque with the help of friction. Cylindrical shank is generally suitable for smaller twist drill, end mill and other tools, cutting with the help of the friction generated when clamping torque transfer. The shank of many tools with handles is made of low alloy steel, and the working part is made of high speed steel welded to each other.

The basic properties that the tool material should have

1. High hardness

The hardness of the tool material must be higher than the hardness of the workpiece material to be machined, which is the basic feature that the tool material should have.

2. Sufficient strength and toughness

The material of the cutting part of the tool must withstand great cutting force and impact force when cutting. The bending strength and impact toughness reflect the ability of tool material to resist brittle fracture and edge breakage.

3. High wear resistance and heat resistance

The wear resistance of tool materials refers to the ability to resist wear. The higher the hardness of the tool material, the better the wear resistance; The higher the high temperature hardness, the better the heat resistance, the tool material at high temperature resistance to plastic deformation, anti-wear ability is also stronger.

4. Good thermal conductivity

Large thermal conductivity means good thermal conductivity, and the heat capacity generated during cutting is easily transmitted out, thereby reducing the temperature of the cutting part and reducing tool wear.

5. Good technology and economy

In order to facilitate manufacturing, the tool material is required to have good machinability, including forging, welding, cutting, heat treatment, grindability and so on. Economy is one of the important indexes to evaluate and promote the application of new tool materials.

6. Resistance to bonding

Prevent the workpiece and the tool material molecules under the action of high temperature and high pressure adsorption bond.

7. Chemical stability

It means that the tool material is not easy to react chemically with the surrounding medium at high temperature.

Tool coating

Aluminum alloy indexable inserts are now coated with hard or composite layers of titanium carbide, titanium nitride, alumina by chemical vapor deposition. The physical vapor deposition method that is being developed can be used not only for aluminum alloy tools, but also for high-speed steel tools such as drills, hobs, taps and milling cutters. As a barrier that prevents chemical diffusion and heat conduction, the hard coating slows down the wear rate of the tool during cutting, and the life of the coated blade is about 1 to 3 times higher than that of the uncoated blade.

Tool selection is carried out in the human-machine interaction state of NC programming. The tool and handle should be correctly selected according to the machining capacity of the machine tool, the performance of the workpiece material, the processing procedure, the cutting amount and other relevant factors.

The general principle of tool selection: easy installation and adjustment, good rigidity, high durability and accuracy. On the premise of meeting the processing requirements, try to choose a shorter tool handle to improve the rigidity of the tool processing. When selecting the tool, the size of the tool should be adapted to the surface size of the workpiece to be machined.

1. End milling cutter is often used to process the peripheral outline of plane parts.

2. When milling the plane, carbide blade milling cutter should be selected.

3. When processing convex and grooves, choose high-speed steel end milling cutter.

4. When processing the blank surface or roughing the hole, you can choose the corn milling cutter with cemented carbide blade.

5. For the processing of some vertical surface and variable bevel contour, ball end milling cutter, ring milling cutter, conical milling cutter and disk milling cutter are often used.

6. In the processing of free-form surface, because the cutting speed of the end of the ball head tool is zero, so in order to ensure the processing accuracy, the cutting line spacing is generally very dense, so the ball head is often used in the finishing of the surface.

7, flat head tool in the surface processing quality and cutting efficiency are better than the ball head knife, therefore, as long as the premise of ensuring but cutting, whether it is rough surface machining or finishing, should be preferred to choose flat head knife.

8. In the machining center, various tools are installed on the tool library, and the tool selection and tool change are carried out at any time according to the procedure. Therefore, the standard tool handle must be used in order to make the standard tool for drilling, boring, expanding, milling and other processes quickly and accurately installed on the machine spindle or tool library. The number of tools should be reduced as far as possible; After a tool is installed, it should complete all the processing parts that it can carry out; Rough finishing tools should be used separately, even if the same size specifications of the tool; Milling before drilling; Surface finishing is carried out first, and then 2D contour finishing is carried out. Where possible, the automatic tool change function of CNC machine tools should be used as much as possible to improve production efficiency.

Problems encountered in processing aluminum and solutions when processing pure aluminum, easy to stick knife analysis and solutions:

1. Aluminum material is soft in texture and easy to stick at high temperature;

2. Aluminum is not resistant to high temperature, easy to open;

3. Related to processing cutting fluid: good oil lubrication performance; Good water-soluble cooling performance; High dry cutting cost;

4. When processing pure aluminum, the end mill dedicated to aluminum processing should be selected: positive front Angle, sharp cutting edge, large chip discharge slot, 45 degrees or 55 degrees helix Angle;

5. The material of the workpiece and the CNC tool has a greater affinity.

6. Rough front tool processing soft materials.

Recommendation: Machine tool conditions are poor to good requirements are low to high, please use high-speed steel, coated polished carbide, PCD polycrystalline diamond and single crystal diamond.

7. Low speed can be avoided by cutting fluid, high speed oil mist lubrication, the effect can be improved, aluminum alloy suitable

Due to the high temperature, high pressure, high speed, and the parts working in the corrosive fluid medium, the application of difficult to process more and more materials, the automation level of cutting processing and the processing accuracy requirements are getting higher and higher. In order to adapt to this situation, the development direction of the tool will be the development and application of new tool materials; Further develop the vapor deposition coating technology of the tool, and deposit higher hardness coating on the matrix of high toughness and high strength, so as to better solve the contradiction between hardness and strength of the tool material; Further development of indexable tool structure; Improve the manufacturing accuracy of the tool, reduce the difference in product quality, and optimize the use of the tool.How to choose CNC aluminum alloy machining tool.

The success or failure of aerospace operations depends on the accuracy, precision and quality of the components used. For this reason, aerospace companies utilize advanced manufacturing techniques and processes to ensure that their components fully meet their needs. While new manufacturing methods such as 3D printing are rapidly gaining popularity in the industry, traditional manufacturing methods such as machining continue to play a key role in the production of parts and products for aerospace applications. Such as better CAM programs, application-specific machine tools, enhanced materials and coatings, and improved chip control and vibration damping - have significantly changed the way aerospace companies manufacture critical aerospace components. However, sophisticated equipment alone is not enough. Manufacturers must have the expertise to overcome the material processing challenges of the aerospace industry.

The manufacture of aerospace parts first requires specific material requirements. These parts typically require high strength, low density, high thermal stability and corrosion resistance to handle extreme operating conditions.

Common aerospace materials include:

1. High strength aluminum alloy

High-strength aluminum alloys are ideal for aircraft structural parts because of their light weight, corrosion resistance and ease of processing. For example, 7075 aluminum alloy is widely used in the manufacture of aerospace parts.

2. titanium alloy

Titanium alloys have excellent strength to weight ratio and are widely used in aircraft engine parts, fuselage components and screws.

3. Superalloy

Superalloys maintain strength and stability at high temperatures and are suitable for engine nozzles, turbine blades and other high-temperature parts.

4. Composite material

Carbon fiber composites perform well in reducing structural weight, increasing strength and reducing corrosion, and are commonly used in the manufacture of casings for aerospace parts and spacecraft components.

Process planning and design

Process planning and design are required before processing. At this stage, it is necessary to determine the overall processing scheme according to the design requirements of the parts and material characteristics. This includes determining the process of processing, the choice of machine tool equipment, the selection of tools, etc. At the same time, it is necessary to carry out detailed process design, including the determination of cutting profile, cutting depth, cutting speed and other parameters.

Material preparation and cutting process

In the process of aerospace parts processing, the first need to prepare working materials. Usually, the materials used in aviation parts include high-strength alloy steel, stainless steel, aluminum alloy and so on. After the material preparation is completed, the cutting process is entered.

This step involves the selection of machine tools, such as CNC machine tools, lathes, milling machines, etc., as well as the selection of cutting tools. The cutting process needs to strictly control the feed speed, cutting speed, cutting depth and other parameters of the tool to ensure the dimensional accuracy and surface quality of the parts.

Precision machining process

Aerospace components are usually very demanding in terms of size and surface quality, so precision machining is an indispensable step. At this stage, it may be necessary to use high-precision processes such as grinding and EDM. The goal of the precision machining process is to further improve the dimensional accuracy and surface finish of the parts, ensuring their reliability and stability in the aviation field.

Heat treatment

Some aerospace parts may require heat treatment after precision machining. The heat treatment process can improve the hardness, strength and corrosion resistance of the parts. This includes heat treatment methods such as quenching and tempering, which are selected according to the specific requirements of the parts.

Surface coating

In order to improve the wear resistance and corrosion resistance of aviation parts, surface coating is usually required. Coating materials can include cemented carbide, ceramic coating, etc. Surface coatings can not only improve the performance of parts, but also extend their service life.

Assembly and testing

Do parts assembly and inspection. At this stage, the parts need to be assembled in accordance with the design requirements to ensure the accuracy of the match between the various parts. At the same time, rigorous testing is required, including dimensional testing, surface quality testing, material composition testing, etc., to ensure that parts meet aviation industry standards.

Strict quality control: The quality control requirements of aviation parts are very strict, and strict testing and control are required at each processing stage of aviation parts to ensure that the quality of parts meets the standards.

High precision requirements: Aerospace components typically require very high accuracy, including dimensional accuracy, shape accuracy and surface quality. Therefore, high-precision machine tools and tools need to be used in the processing process to ensure that the parts meet the design requirements.

Complex structure design: Aviation parts often have complex structures, and it is necessary to use multi-axis CNC machine tools and other equipment to meet the processing needs of complex structures.

High temperature resistance and high strength: aviation parts usually work in harsh environments such as high temperature and high pressure, so it is necessary to choose high temperature resistance and high strength materials, and carry out the corresponding heat treatment process.

Overall, aerospace parts processing is a highly technology-intensive, precision demanding process that requires strict operating processes and advanced processing equipment to ensure that the quality and performance of the final parts can meet the stringent requirements of the aviation sector.

Aerospace parts processing is challenging, mainly in the following areas:

Complex geometry

Aerospace parts often have complex geometrics that require high-precision machining to meet design requirements.

Super alloy processing

The processing of superalloys is difficult and requires special tools and processes to handle these hard materials.

Large parts

The parts of the spacecraft are usually very large, requiring large CNC machine tools and special processing equipment.

Quality control

The aerospace industry is extremely demanding on part quality and requires rigorous quality control and inspection to ensure that every part meets the standards.

In aerospace parts processing, precision and reliability are key. A deep understanding and fine control of materials, processes, precision and machining difficulties is the key to manufacturing high-quality aerospace parts.