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.




What is electroplating? What are the types and applications of electroplating?

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.


What is polishing?

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.

HONSCN Precision has been a professional CNC machining manufacturer for 20 years. Cooperation with more than 1,000 enterprises, deep technology accumulation, senior technician team, welcome to consult customized processing!Customer service

Surveying and mapping of mechanical parts
Project introduction
Customer products
This product is a mechanical part, and the processing structure is complex, so the size and relative position requirements are high. Therefore, the accessory needs to scan the data of the first industrial part in 3D, detect the quality error between the data and the design document, and analyze the mapping cost of mechanical parts to ensure the smooth progress of production.
Customer difficulties
After the customer's castings are processed, how to detect them has become a difficult problem. The customer has no way to detect the complex structure, many internal dimensions, important processing positions and relative positions.
Nanjing Ningrui handheld 3D laser scanner
The customer recognizes that the measuring equipment
The customer learned about our hand-held 3D laser scanner of Nanjing Ningrui metrology through the introduction of a friend, and checked the relevant knowledge on the Internet. He thought it was too suitable for the mapping of mechanical parts they wanted, so he found us.
Introduction to 3D laser scanner
When the portable 3D scanner T-scan works, the six beam laser is used to obtain the three-dimensional point cloud on the object surface. The operator can hold the equipment in his hand and adjust the distance and angle between the instrument and the measured object in real time. The operation is flexible, convenient and easy to learn. When scanning large volume objects, it can cooperate with the global photogrammetry system to eliminate the cumulative error and scan the size, shape and working environment of the scanned objects efficiently and accurately.
Operation of handheld 3D laser scanner and photogrammetry on products
Solution
The hand-held three-dimensional scanner is a mechanical mapping equipment. Firstly, the positioning mark points should be quickly pasted on the scanned products, and then the three-dimensional data of workpiece surface shape can be obtained quickly and accurately by using the mark points pasted on the workpiece surface through non-contact three-dimensional laser scanning; After the scanner obtains the high-precision data, the obtained data is compared with the existing digital analog, so as to obtain the product deviation and carry out cost analysis.
Scanning process
It takes 7 minutes to paste the marked points;
Data post-processing and comparison for 45 minutes.
Process display
3. Data comparison
summary
The grooved parts of the rotor body in the machine conform to the fit of the rotor gear and change the old comparison method. The use of 3D laser scanner is not only convenient and fast, but also can more accurately grasp the accuracy of each position, which brings better service to customers.
Reverse / comparative product presentation LW

Comparative detection of automobile lamps with three-dimensional scanner
one Industry status
The customer's product is the car lamp. It is difficult to scan the lamp. Because many places on the lamp are transparent, and the laser of the scanner is transparent, it is difficult to scan.
two Limitations of customers' current testing methods
For this car lamp, the customer doesn't have any effective measurement means, and then the customer comes to us. We use hscan handheld 3D laser scanner to help them scan and measure. During the scanning process, we will spray white powder on the transparent part of the object, and through processing, present the data required by the customer completely, and submit the comparison results to the customer.
Firstly, quickly paste the positioning mark point on the scanned air conditioner, spray the lamp with white powder, and then scan the tested part as a whole through non-contact three-dimensional laser scanning, and carefully scan the details. Finally, compare and adjust the obtained data, and make a test report.
two Required instrument and model
Hscan handheld 3D laser scanner Prince series.
three Scanner working hours
It takes 2 minutes to paste the marked points;
Data post-processing and comparison report for ten minutes.
1 scan data
For this kind of car lamp, the hand-held three-dimensional laser scanner has incomparable advantages: first, the point non-contact scanning has no limit on the size of the measured workpiece; Secondly, hand-held scanning, the workpiece does not need to be fixed, and there is no need to specially design the detection fixture, so it can be inspected on arrival. By using our three-dimensional scanner, customers shorten the detection cycle and reduce the detection cost.
Reverse / comparative product display
lw

CNC metalworking is replacing other manufacturing technologies in multiple industries. The medical field is considered an area where mistakes are rare, and the same rules apply when it comes to manufacturing medical parts, because human lives are at stake in this field, and even small mistakes can lead to serious health problems or even death. Therefore, the machining techniques that machinists use to produce medical parts must support tight tolerances and high-precision measurements.

CNC metalworking is growing in popularity due to its ability to mass-produce detailed and precise results, which has led to an increase in the number of producers using CNC machines in the industry.



CNC machining is a manufacturing method in which the tool movement is controlled by pre-programmed computer software. All medical products can be manufactured accurately and quickly with the help of CNC milling and turning. Let's look at the main advantages of CNC machining demand in the healthcare industry:

No fixed tool

CNC machining is unmatched in terms of fast turnaround and minimal investment in small batch production, even in disposable products. Parts for the medical industry often have to be manufactured quickly and in small batches. At the same time, CNC metalworking allows parts to be manufactured without dedicated tools, which can extend the manufacturing process but provide excellent quality and precision even without the use of tools.

No quantity limit

After you create a digital CAD (Computer Aided Design) file, you can easily build a cutting program from it at the touch of a button. The coding application can manufacture a single part or any number of parts with the highest precision and accuracy. This is a huge benefit when creating disposable or disposable custom parts, such as highly specialized medical devices, appliances, equipment, prosthetics, and other medical or surgical products. Other procedures require a minimum order size to obtain the required raw materials, making certain projects impractical, while CNC machining does not require a minimum order size.

High tolerance

Many medical types of equipment require a large tolerance range, and with CNC machines, this is easily achieved. The surface finish is usually very good and requires minimal post-treatment, saving time and money, but this is not the most important consideration. In general, the most important thing to remember about medical supplies and equipment is that they must be fit for their purpose, and any deviation from the standard can mean disaster.

Fast machine

CNC machines are faster and can work 24 hours a day, 365 days a year. Apart from routine maintenance, repairs and upgrades are the only time manufacturers stop using equipment.

Digital CAD files are lightweight and flexible

Product designers, medical specialists, and manufacturing professionals can quickly and easily transfer digital programs from one location to another. The technology significantly improves CNC machining capabilities to produce high-quality specialty medical devices and equipment solutions, regardless of geographic location, whenever and wherever they are needed. This feature of CNC machining is very convenient, especially in time-critical medical environments.



How is CNC Machining changing the healthcare industry
CNC machining has revolutionized the way medical devices and devices are designed, manufactured, personalized, and used. The precision, customization and speed of CNC machining transform patient care, enabling personalized treatment and improving surgical outcomes.

The technology paves the way for breakthrough innovations in prosthetics, devices, and therapeutics, and drives advances in many areas of healthcare.

CNC machining brings many advantages to the medical field, including:

Precision and accuracy

The operation precision of CNC machine tools is extremely high. This level of precision is essential for the production of surgical instruments, implants and micro-devices used in minimally invasive surgery. The precision and consistency provided by CNC machining improves performance during medical procedures and reduces the risk of complications.

This is especially important for surgeons who rely on ultra-sophisticated and reliable instruments to perform delicate tasks. From scalpel handles to robotic surgical assistants, CNC machining provides high-quality tools that improve accuracy and patient safety.

Customization and personalization

CNC machining enables the creation of personalized medical parts and devices based on a patient's unique anatomy. This ability makes it possible to create personalized orthopedic implants, dentures, hearing AIDS and other devices.

Using patient-specific data such as 3D scans or MRI images, CNC machines can precisely create items that fit perfectly to the patient's body. This improves comfort, function and treatment effectiveness, and accelerates patient recovery.

Complex shape and structure

CNC machining can produce complex geometries and complex internal structures that are often difficult to achieve with other manufacturing methods. The ability to precisely carve internal cavities, channels, and delicate features is especially valuable when manufacturing implants, microdevices, and surgical instruments.

Rapid prototyping

Prototyping allows medical engineers and designers to create functional models of parts and devices, enabling them to evaluate design, assembly, and functionality before starting production. The combination of computer-aided design (CAD) software and CNC machine tools allows digital designs to be quickly translated into physical prototypes.

This allows for iterative design improvements and helps ensure that medical devices are thoroughly tested and optimized prior to release. In an evolving field, rapid prototyping can enhance innovation and help bring new medical advances to market faster.

Process optimization

The integration of CNC machining with advanced technologies such as automation and artificial intelligence (AI) minimizes errors and enables automated quality control processes. This increases efficiency, reduces production time and improves product quality, all of which contribute to improved patient outcomes.

In addition, automated CNC systems can operate continuously with minimal human-machine interaction between operations. Some CNC machines are also capable of multi-axis machining and performing tasks on different surfaces of parts at the same time.

By reprogramming machines, manufacturers can quickly switch between producing one type of part and another. This reduces conversion times and means that different parts can be made on the same machine in a single shift. These features help speed up production cycles, reduce downtime, and increase overall production.

Flexible material selection

CNC machining is suitable for a wide range of materials, including metals, plastics and composites. This versatility enables manufacturers to consider factors such as biocompatibility, durability and functionality to select the most appropriate material for a specific medical application.

Cost saving

Although industrial CNC machines can be expensive, they offer significant cost saving opportunities in the long run. By eliminating the need for dedicated jigs, fixtures, and dedicated tools for each part, CNC machining helps minimize setup time, simplify production, and reduce manufacturing costs.

The technology also reduces waste and costs through material optimization. This is especially important in the medical field, as implants are often made with high-value materials such as titanium and platinum. The increased efficiency and productivity of CNC machining also contribute to cost savings over time.



What are CNC processed medical products?
Due to the critical nature of medical devices and components, the medical industry requires high-quality and high-precision products. Therefore, CNC machining is widely used in medical applications. Below, we will introduce what CNC machining medical products are?

1. Medical implants

Orthopedic implants: CNC machining is commonly used to manufacture orthopedic implants, such as hip and knee replacements.

Dental implants: Use CNC machining to manufacture precise and customized dental implants.

2. Electronic medical equipment

MRI components: Some components of magnetic resonance imaging (MRI) machines, such as structures, brackets, and housings, are often machined using CNC.

Diagnostic equipment enclosures: CNC machining is used to manufacture enclosures and housings for a wide range of medical diagnostic equipment, ensuring precise dimensions, durability, and compatibility with electronic components.



3. Medical surgical instruments

Scalpels and blades: CNC machining is used to produce surgical instruments such as scalpels and blades.

Tweezers and clamps: Surgical instruments with complex designs, such as tweezers and clamps, are usually CNC machined to achieve the desired accuracy.



4. Prosthetics and orthotics

Custom prosthetic components: CNC machining is used to manufacture custom prosthetic components, including acceptance chamber components, joints, and connectors.

Orthopedic brackets: Components of orthopedic brackets that provide support and alignment to various parts of the body can be CNC machined.

5. Endoscope assembly

Endoscope housings and parts: CNC machining is used to produce parts of endoscope equipment, including housings, connectors, and structural parts.

6. Prototype medical equipment

Prototyping components: CNC machining is widely used for rapid prototyping of various medical devices.

Finally, machining medical devices is a process that requires a high level of precision and accuracy. Therefore, the technology is very suitable for CNC machining.

Honscn Precision is a reliable manufacturer of medically critical components for surgical instruments and tools as well as medical device prototyping. With 20 years of experience in CNC manufacturing, we are driven by the need to ensure the closest tolerances and accuracy for each machined part. Our skilled mechanics can tailor machined parts designs to the highest standards for all aspects of the medical industry. Do you want to start your CNC machining project at Honscn Precision?Click here to start your custom service

1. Fault phenomenonWhen changing the knife, the manipulator is stuck and cannot change the knife. The position of the manipulator for changing the knife is offset, and the knife is changed.2 fault analysis and treatment


2.1 tool change principleThe machining center is a rotary tool magazine, and the tool change mechanism is cam type. The tool change process is as follows:(1) Write m06t01 to start the tool change and tool selection cycle.
(2) The spindle will stop at the oriented spindle stop point, the coolant stops, and the z-axis moves to the tool change position (second reference point).(3) Select the tool. After NC compiles it to PLC according to the t command, start selecting the tool. The tool magazine motor rotates and rotates the target tool number to the tool change point of the tool magazine. Note that the t command is the tool sleeve position of the tool magazine at this time.(4) The tool change motor drives the cam mechanism to rotate 90 from the parking position to grasp the tool in the effective tool sleeve and the tool in the spindle. At the same time, detect the change of the proximity switch state of the cam mechanism, the PMC output sends out the tool loosening command, the tool magazine tool sleeve tool loosening and the spindle tool loosening solenoid valve are powered on, the cam continues to rotate, drive the manipulator down, push down the tool handle and prepare for exchange. As shown in Figure 1.
(5) The manipulator rotates 180 to exchange the tool, the cam continues to move upward, install the tool into the spindle, and install the tool on the original spindle into the tool sleeve at the tool change position of the tool magazine. At the same time, the detection switch sends a tool tightening command to PMC, the solenoid valve loses power, the shaft tool handle is clamped, the butterfly spring retracts, and the spindle tool is clamped.(6) Change to the manipulator, continue to rotate 90 , and stop completing a set of tool change actions.2.2 fault analysis
Change the tool to the fourth step of 2.1. The tool change manipulator is stuck, and the spindle has been loosened for blowing, but the tool cannot be pulled out. Cut off the power and manually turn the tool change motor. After completing a tool change action, manually load and unload the tool, the action is normal, and the problems of spindle tightening tool are preliminarily eliminated. When the tool change process is performed again, the manipulator gets stuck and the manipulator claw at the tool magazine falls off. After the tool change is found, the manipulator installs the tool on the spindle and the position is offset, as shown in Figure 2.
After the tool is removed, it is found that the action is normal. The reason for this situation may be the offset between the manipulator and the spindle, or the deviation of the accuracy of the manipulator axis relative to the spindle axis, and the inaccurate positioning of the spindle will also lead to the offset of the tool change position. Implement the tool change action step by step, check the accurate positioning of the spindle, and eliminate the fault caused by inaccurate positioning. According to the table, the mechanicalThe axial position and rotation center distance of hand, knife sleeve and spindle are consistent, so the fault of mechanical jamming of mechanical mobile phone is also eliminated.
Recently, this machine tool mainly processes stainless steel and other material workpieces, with large cutting volume and heavy load. It runs under re cutting for a long time. It is found that the manipulator is not loose and the telescopic action of the manipulator claw is flexible. However, it is found that the adjustment block on the manipulator is worn. It is disassembled and observed that the adjustment block is mainly used to clamp the tool handle. After re repair and processing, try again, The offset disappears at the spindle position. The main cause of this fault is the large impact of the manipulator and frequent tool change, resulting in the loosening and wear of the clamping claw, as shown in Figure 3.