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In the field of machining, after CNC machining process methods and division of processes, the main content of the process route is to rationally arrange these processing methods and processing sequence. In general, CNC machining of mechanical parts includes cutting, heat treatment and auxiliary processes such as surface treatment, cleaning and inspection. The sequence of these processes directly affects the quality, production efficiency and cost of the parts. Therefore, when designing CNC machining routes, the order of cutting, heat treatment and auxiliary processes should be reasonably arranged, and the connection problem between them should be solved.
In addition to the basic steps mentioned above, factors such as material selection, fixture design and equipment selection need to be considered when developing a CNC machining route. Material selection is directly related to the final performance of parts, different materials have different requirements for cutting parameters; The fixture design will affect the stability and accuracy of the parts in the process of processing; Equipment selection needs to determine the type of machine tool suitable for its production needs according to the characteristics of the product.
What do we have to do before arranging the CNC machining process route?
1, the processing method of precision machinery parts should be determined according to the characteristics of the surface. On the basis of familiar with the characteristics of various processing methods, mastering the processing economy and surface roughness, the method that can ensure the processing quality, production efficiency and economy is selected.
2, select the appropriate drawing positioning reference, according to the principle of crude and fine reference selection to reasonably determine the positioning reference of each process.
3, When developing the machining process route of the parts, it is necessary to divide the rough, semi-fine and finishing stages of the parts on the basis of the analysis of the parts, and determine the degree of concentration and dispersion of the process, and reasonably arrange the processing sequence of the surfaces. For complex parts, several schemes can be considered first, and the most reasonable processing scheme can be selected after comparison and analysis.
4, determine the processing allowance and process size and tolerance of each process.
5, select machine tools and workers, clips, quantities, cutting tools. The selection of mechanical equipment should not only ensure the quality of processing, but also be economical and reasonable. Under the conditions of mass production, general machine tools and special jigs should generally be used.
6, Determine the technical requirements and inspection methods of each major process.Determining the cutting amount and time quota of each process is usually decided by the operator for a single small batch production plant. It is generally not specified in the machining process card. However, in the medium batch and mass production plants, in order to ensure the rationality of production and the balance of rhythm, it is required that the cutting amount must be specified, and must not be changed at will.
cnc machining process arrangement
First rough and then fine
The processing accuracy is gradually improved according to the order of rough turning - semi-fine turning - fine turning. The rough lathe can remove most of the machining allowance of the workpiece surface in a short time, thereby increasing the metal removal rate and meeting the requirement of the uniformity of the allowance. If the residual amount left after the rough turning does not meet the finishing requirements, it is necessary to arrange a semi-finishing car for finishing. The fine car needs to ensure that the outline of the part is cut according to the drawing size to ensure the processing accuracy.
Approach first and then far
Under normal circumstances, the parts close to the tool should be processed first, and then the parts far away from the tool to the tool should be processed to shorten the moving distance of the tool and reduce the empty travel time. In the process of turning, it is beneficial to maintain the stiffness of the blank or semi-finished product and improve its cutting conditions.
The principle of internal and external intersection
For parts that have both an inner surface (inner cavity) and an outer surface to be processed, when arranging the processing sequence, the inner and outer surfaces should be roughed first, and then the inner and outer surfaces should be finished. Must not be part of the surface of the part (outer surface or inner surface) after processing, then processing other surfaces (inner surface or outer surface).
Base first principle
Priority should be given to the surface used as the finishing reference. This is because the more accurate the surface of the positioning reference, the smaller the clamping error. For example, when machining shaft parts, the center hole is usually machined first, and then the outer surface and end face are machined with the center hole as the precision basis.
The principle of the first and the second
The main working surface and assembly base surface of the parts should be processed first, so as to find out the modern defects on the main surface in the blank early. The secondary surface can be interspersed, placed on the main machined surface to a certain extent, before the final finishing.
The principle of the face before the hole
The plane outline size of the box and bracket parts is large, and the plane is generally processed first, and then the hole and other sizes are processed. This arrangement of processing sequence, on the one hand with the processed plane positioning, stable and reliable; On the other hand, it is easy to process the hole on the machined plane, and can improve the processing accuracy of the hole, especially when drilling, the axis of the hole is not easy to deviate.
Conclusion
When developing the machining process of parts, it is necessary to select the appropriate processing method, machine tool equipment, clamp measuring tools, blank and technical requirements for workers according to the production type of parts.
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