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The quality of mechanical processing products is closely related to the dimensional accuracy, surface finish and assembly of parts. The processing technology of mechanical parts is the key to ensuring quality. The mechanical processing accuracy mainly includes dimensional accuracy, shape accuracy, surface accuracy, position accuracy and processing accuracy, etc. Then, how about the various processing dimensional accuracies of CNC machining centers that we commonly talk about? We simply list them as follows:
The surface roughness of the turning process is 1.6 to 0.8 μm.
Rough turning requires the use of large cutting depths and large feed rates without reducing the cutting speed to improve turning efficiency. The surface roughness requirement is 20-10 μm.
Semi-finishing and finishing should be carried out at high speed with small feed rates and cutting depths as much as possible. The surface roughness should be 10 to 0.16 μm.
High-precision lathes can use finely ground diamond turning tools to perform high-speed precision turning on non-ferrous metal workpieces, achieving a surface roughness of 0.04 to 0.01 microns. This type of turning is also known as mirror finishing.
Spark machine processing can achieve 0.005mm.
Grinding machine processing can achieve 0.005. Please provide the text you would like translated.
The above are the more common machining accuracy standards for mechanical processing machines. Of course, the higher the price of the mechanical equipment, the higher the accuracy will naturally be.
In addition, factors such as the process steps of CNC machining, personnel operation, the service life of CNC machine tools, and tool wear all have an impact on the quality of mechanical parts.
All of these will have an impact on the quality of mechanical parts. Chenju Precision focuses on precision parts processing services, providing 3-axis, 4-axis, 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, small batch parts processing and other services. It is good at processing complex-structured workpieces and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality qualification rate of 99.93%. It provides high-quality small batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.
Precautions for Five-axis CNC Aluminum Machining
1.Select a reasonable cutting volume. Staff members choose the cutting speed to be used based on the material, hardness, cutting state, type of material, and depth of cut of the aluminum shell to be processed. These conditions are essential for effectively reducing machine wear.
2. Select appropriate cutting tools. When rough turning, generally speaking, it is better to choose cutting tools with high strength and durability, so as to better meet the requirements of rough turning.
3. Select reasonable fixtures. The parts should fully meet the requirements of the machine to reduce unnecessary positioning errors. It is better to choose dedicated fixtures for clamping tools.
4. Determine a reasonable processing path. Try to shorten the processing path of the aluminum shell during CNC machining as much as possible to reduce machine wear.
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in handling complex-structured workpieces and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services, with sample production within 3 days and delivery within 7 days.
In recent years, the application of aluminum alloy shells has become increasingly widespread. As is well known, aluminum shells are various types of shells made of aluminum alloy. They are processed from aluminum profiles obtained by the aluminum stretching method of hardware shells and can be widely used in the electronics industry. So, what are the advantages of CNC processing of aluminum shells? Next, the editor of Chenju Precision will explain to you.
Advantages of CNC machining for aluminum shells:
1.Aluminum profile shells are easy to process, which is unmatched by other types of shells. However, the waterproof performance of aluminum profile shells is generally poor, making them unsuitable for use in the wild and harsh environments.
2. The chemical properties of aluminum shell CNC processing are stable, it is non-magnetic and recyclable. It is a benign and recyclable metal material.
3. The finished products of aluminum shell CNC processing are free of metal contamination, non-toxic, and the surface oxide layer contains no volatile metals.
4. The corrosion resistance of the aluminum shell CNC processing makes it not restricted by the office environment. It can also be used in some chemical plants. On the one hand, it can protect the internal components and provide convenience for customers.
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in complex-structured workpieces and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.
The CNC machining process is of considerable significance in terms of quality control. During the on-site production of CNC machining, it is necessary to formulate an operation instruction manual, namely SOP, and strictly implement it to standardize the operation of the machine by employees. In workshop management, products and tools must be neatly placed within the planned area lines, maintaining a clean and dry environment. For the inspection of finished products before shipment, the most crucial aspect is the quality of personnel, their meticulousness in handling processed parts. If workers can handle each operation step with care, ensuring gentle handling, it will greatly contribute to the quality of the products.
The production process is of great significance in quality control. In the CNC machining site, during the production process, operation instruction books, namely SOPs, should be formulated and strictly implemented to standardize the operation of the machines by the employees. Each process should be assigned to a specific person. It is very important for employees to conduct self-inspection of the products. After multiple checks, the quality department will inspect and only qualified products will proceed to the next process. No substandard products should be manufactured and no defective products should flow into the production process. Each workshop should place the products awaiting inspection, qualified products and unqualified products in different areas and clearly mark them to prevent confusion.
2. When managing the workshop, products and tools must be neatly placed within the planned area lines, and kept clean and dry. Only in this way can the processed parts reach a very high standard. The dimensions should be inspected according to the drawings without any deviation, and the shape and position tolerances should be met. Only when they are "clean" and "free from scratches on the surface" can they be regarded as qualified finished products.
3. The most important aspect of the finished product's outgoing inspection is the quality of the personnel and their meticulousness in handling the processed parts. If workers can handle the parts gently during each operation, ensure no metal shavings remain on the workpieces after each process, stack the workpieces neatly in designated areas, take appropriate protective measures to prevent collisions and scratches between the workpieces, and perform thorough cleaning and packaging at the final stage to ensure the parts are clean and free of oil stains, the outgoing inspection can be carried out smoothly. Strictly follow the process regulations, and carefully conduct self-inspection, mutual inspection, and final inspection. Shenzhen Haowei Precision Machinery Co., Ltd. undertakes the processing of non-standard parts. Welcome to contact us by phone!
Regular inspection of the equipment and fixtures in CNC lathe processing and maintenance of the machine can reduce quality problems caused by potential abnormalities of the lathe itself. To ensure that CNC processed products meet high-precision requirements, reasonable planning and implementation of production management can be more effective, and it can also increase production capacity!
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in handling complex-structured workpieces and can customize dedicated fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services to customers, with sample production within 3 days and delivery within 7 days.
Machining accuracy refers to the degree of conformity between the actual geometric parameters (size, shape and position) of a part after processing and the ideal geometric parameters. Generally, the higher the degree of conformity, the higher the machining accuracy. In actual processing, it is impossible to make the part exactly the same as the ideal one, and there will always be deviations of different magnitudes. The degree of deviation of the actual geometric parameters of the part after processing from the ideal geometric parameters is called machining error.
The factors that affect the machining accuracy and cause machining errors can be classified into three aspects:
(3) Errors during the adjustment of work, fixtures and tools.
(2) Cutting heat and other heat sources cause deformation of the process system.
(6) Measurement Error
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in complex-structured workpieces and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.
What is CNC machining technology?
CNC machining is a widely used manufacturing technology in mechanical processing factories, representing Computer Numerical Control (CNC) machining. CNC machining utilizes computer-controlled precision machine tools to perform precise cutting, drilling, milling, turning, and other processing operations on workpieces based on pre-designed programs and instructions. The core of CNC machining lies in the combination of computer computing technology and the movement of mechanical processing machine tools. It controls the movement of machine tools through pre-written tool path programs to achieve high-precision processing of workpieces. Compared with traditional mechanical processing, CNC machining methods offer higher processing accuracy, faster processing speed, and greater flexibility, meeting the processing requirements of various complex shapes and sizes.
The CNC machining process typically involves the following steps: First, the master of the CNC machining factory creates a 3D model using programming software (such as SW, UG, MC) based on the drawing requirements of the workpiece, and generates the corresponding machining tool path, which is then output as G-code. Then, these codes are input into the control system of the CNC machine tool, and the machine tool automatically completes the machining process of the workpiece according to the code instructions. Throughout the machining process, the accuracy and stability of the machine tool are fully guaranteed, thus ensuring the machining quality of the workpiece.
CNC machining technology has extensive applications in multiple fields. In the aerospace industry, CNC machining can produce high-precision and high-strength components, meeting the strict requirements of aircraft. In the automotive manufacturing sector, CNC machining can efficiently produce key parts such as engines and chassis, enhancing the performance and safety of automobiles. Additionally, CNC machining is widely used in electronics, molds, medical devices, and other fields, providing strong support for the innovative development of various industries.
With the continuous development of intelligent manufacturing and industrial Internet of Things, the CNC machining technology of manufacturers in Beijing, Tianjin, Hebei, Shandong and surrounding areas is also constantly innovating and improving. On the one hand, the performance of CNC machine tools is constantly improving, and the processing accuracy and speed have reached new heights; on the other hand, CNC machining technology is combined with other advanced manufacturing technologies, such as CNC lathes and 3D printing technology, forming a more complete manufacturing system. These technological innovations have brought CNC machining manufacturers broader processing options and a wider range of customer applications.
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in handling complex-structured workpieces and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.
What is CNC machining technology?
CNC machining is a widely used manufacturing technology in mechanical processing factories, representing Computer Numerical Control (CNC) machining. CNC machining utilizes computer-controlled precision machine tools to perform precise cutting, drilling, milling, turning, and other processing operations on workpieces based on pre-designed programs and instructions. The core of CNC machining lies in the combination of computer computing technology and the movement of mechanical processing machine tools. It controls the movement of machine tools through pre-written tool path programs to achieve high-precision processing of workpieces. Compared with traditional mechanical processing, CNC machining methods offer higher processing accuracy, faster processing speed, and greater flexibility, meeting the processing requirements of various complex shapes and sizes.
The CNC machining process typically involves the following steps: First, the master of the CNC machining factory creates a 3D model using programming software (such as SW, UG, MC) based on the drawing requirements of the workpiece, and generates the corresponding machining tool path, which is then output as G-code. Then, these codes are input into the control system of the CNC machine tool, and the machine tool automatically completes the machining process of the workpiece according to the code instructions. Throughout the machining process, the accuracy and stability of the machine tool are fully guaranteed, thus ensuring the machining quality of the workpiece.
CNC machining technology has extensive applications in multiple fields. In the aerospace industry, CNC machining can produce high-precision and high-strength components, meeting the strict requirements of aircraft. In the automotive manufacturing sector, CNC machining can efficiently produce key parts such as engines and chassis, enhancing the performance and safety of automobiles. Additionally, CNC machining is widely used in electronics, molds, medical devices, and other fields, providing strong support for the innovative development of various industries.
With the continuous development of intelligent manufacturing and industrial Internet of Things, the CNC machining technology of manufacturers in Beijing, Tianjin, Hebei, Shandong and surrounding areas is also constantly innovating and improving. On the one hand, the performance of CNC machine tools is constantly improving, and the processing accuracy and speed have reached new heights; on the other hand, CNC machining technology is combined with other advanced manufacturing technologies, such as CNC lathes and 3D printing technology, forming a more complete manufacturing system. These technological innovations have brought CNC machining manufacturers broader processing options and a wider range of customer applications.
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in handling complex-structured workpieces and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.
How are the machining accuracy grades of CNC machining classified?
The classification of CNC machining accuracy grades can be comprehensively analyzed from multiple dimensions as follows:
I. Classification Based on IT Tolerance Grades
High-precision grade: IT01 to IT5, with tolerance ranges from micrometers to sub-micrometers, is suitable for applications in precision instruments, aerospace, and other fields. For instance, mirror grinding can achieve above IT5, with surface roughness Ra ≤ 0.01 μm.
Ordinary grade: IT9 to IT18, with a tolerance range of over 100 micrometers, is suitable for agricultural machinery and rough machining scenarios. For example, rough milling is at IT11 to IT13 grade, with a surface roughness of Ra = 20 μm.
II. Classification Based on Machine Tool Performance
It is suitable for general mechanical processing, such as the manufacturing of electronic devices and general components.
Precision grade (M grade)It is applied in ultra-precision processing scenarios such as optical components and microelectronics.
III. Segmentation by Processing Capacity and Technology
Tolerance: ≥ 0.1mm (below IT9), surface roughness Ra ≥ 1.6μm, such as rough turning and drilling.
IV. Extended Classification of Special Machine Tools
Multi-axis CNC machining center: It can achieve complex surface processing through five-axis or more linkage, with a precision up to IT7 level.
The classification of CNC machining accuracy requires a comprehensive consideration of tolerance grades (IT system), machine tool performance indicators (positioning/repositioning accuracy), and specific process capabilities. When making actual selections, the machining method and machine tool grade should be matched according to the functional requirements of the parts. For instance, aerospace parts require high-precision machine tools (IT5 grade), while ordinary grades (IT8 grade) are sufficient for agricultural machinery components.
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in complex-structured workpieces and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.
1.The oxidation reaction of the aluminum alloy material after oxidation and the cutting fluid
As we all know, aluminum alloy has low plasticity, a relatively low melting point, and good thermal conductivity. When processing aluminum alloy, if the lubricity and cooling performance of the cutting fluid do not meet the requirements, it will lead to the phenomenon of tool adhesion during the processing of aluminum alloy parts, and the chip removal performance will be greatly reduced. If this cycle repeats, the tool is prone to corrosion, increasing the probability of tool breakage. Moreover, when processing aluminum parts, the content of magnesium and silicon inside should be considered. If the magnesium content is high, saponification is likely to occur, at which time the cutting fluid used for processing is prone to lose its lubricating function and also easily causes tool breakage. At the same time, aluminum alloy is a very sensitive amphoteric metal and is prone to oxidation chemical reactions in the air.
2. Corrosion of aluminum alloy parts by cutting fluid
White spots are caused by the insufficient cleaning ability of the cutting fluid. There are residues of cutting fluid on the surface of the parts. The pH value of the cutting fluid is very important. If the pH value is too high, it will corrode the parts. If the pH value is too low, it will allow bacteria to multiply, affecting the stability and performance of the cutting fluid.
After the aluminum alloy parts processed by CNC are oxidized, it is best to use special aluminum alloy cutting fluid. The pH value is generally maintained between 8.5 and 9.5. Moreover, the selection of dilution water is also very strict. Many ions in water are prone to cause corrosion to aluminum. If the ion content is too high, it will reduce the rust prevention properties of the cutting fluid, especially during the rust prevention between processes. For example, chloride ions, sulfate ions and heavy metal ions, etc. Therefore, it is advisable to choose dilution water with a relatively low hardness or water that has been softened through ion exchange to ensure the performance and service life of the cutting fluid.
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in complex structural parts and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.
What are the advantages of CNC precision parts processing?
In the CNC machining industry, the machining accuracy often largely determines the quality of the machined parts. CNC precision parts machining itself is a highly demanding processing method. Compared with traditional processing methods, it can achieve better results and has many advantages that other processing methods do not possess. So, what are the advantages of CNC precision parts machining? Let's have a brief introduction from Chenju Precision:
1.Multi-axis control linkage: Generally, three-axis linkage is the most commonly used, but through some adjustments, it is possible to achieve machining centers with four-axis, five-axis, seven-axis, or even more linkage axes.
2. Parallel connection of machine tools: The functions of common machining centers are relatively fixed. By combining machining centers with turning centers or vertical and horizontal machining centers, the processing range and capacity of the machining centers can be expanded.
3. Tool damage early warning: By using certain technical detection methods, the wear and damage of tools can be detected in a timely manner and an alarm can be raised. This enables the timely replacement of tools to ensure the processing quality of parts.
4. Management of tool life: It is possible to manage multiple tools working simultaneously and multiple inserts on the same tool uniformly to enhance production efficiency.
5. Overload power-off protection for machine tools: Based on the load during the production process, the maximum load level is set. When the load reaches the set value, the machine tool can automatically power off and shut down to protect itself.
Chenju Precision specializes in precision parts processing services, offering 3-axis, 4-axis, and 5-axis CNC machining, turning and milling compound processing, CNC lathe processing, and small-batch parts processing, etc. It excels in complex structural parts and can customize special fixtures and jigs for projects. Each product undergoes at least four full inspection procedures, with a quality pass rate of 99.93%. It provides high-quality small-batch processing customization services for customers, with sample production within 3 days and delivery within 7 days.
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