CNC precision hardware parts processing standards mainly include the following aspects
- Dimensional accuracy :CNC machining can achieve high dimensional accuracy, usually can reach +0.01mm or smaller tolerance requirements. This means that the size of the parts after processing should be very close to the size on the design drawings to meet the accuracy requirements of precision hardware parts.
- Surface roughness :CNC machining should be able to control the surface roughness of parts to meet specific requirements. Usually, the surface roughness can reach Ra0.8um or less, and sometimes it can even reach Ra 0.4um or less to ensure the finish and quality of the part surface.
- Parallelism and perpendicularity :CNC machining needs to ensure the parallelism and perpendicularity of the parts to ensure that the relationship between the various faces of the parts meets the requirements. This usually requires parallelism and perpendicularity within 0.02mm to ensure the geometric accuracy and assembly performance of the parts.
In addition, there are some other technical requirements
- Proficient in the operation of CNC machine tools, including startup, shutdown, manual operation, program editing, error handling, etc., and understand the basic principle and operation process of CNC machining
- Master basic mathematical knowledge, such as trigonometric functions, vector operations, coordinate systems, etc., in order to carry out relevant mathematical calculations and image rendering.
- Familiar with CAD/CAM software technology, able to master the use of CAD/CAM software, according to customer requirements or design drawings to create the corresponding processing program, and realize automatic programming and optimization of processing paths, etc.
- Understand the knowledge of materials and cutting parameters, familiar with the mechanical properties of various materials, processing difficulty, cutting force analysis, etc., and can reasonably choose cutting parameters, such as cutting speed, feed, cutting depth, etc., to ensure processing efficiency and quality.
CNC machining industry benchmarks and quality indicators
• The industry benchmark is as follows
Process benchmark: The first premise of CNC precision machining is the accuracy of the process benchmark, the benchmark on the mechanical drawing is represented by A specific benchmark symbol with a ring with capital letters A, B, C, D, etc., when the benchmark symbol is aligned with the surface and the surface extension line or the size limit of the surface, it is indicated that the surface is the benchmark. When the reference symbol is aligned with the size line, it means that the physical center line marked with the size is the reference.
Assembly process standard
Assembly reference refers to the precision of the assembly used to determine the position of the part in the component or product.
The measurement standard refers to the specification for the size and position of the machined surface to be measured when the parts are inspected.
Positioning reference refers to the reference used for positioning the workpiece in the machine tool or fixture during processing.
• Quality indicators
The precision inspection standards of CNC machine tools mainly include geometric accuracy, positioning accuracy and cutting accuracy.
Geometric accuracy: reflects the geometric shape error of the machine tool mechanical parts, including the straightness and parallelism of the bed guide rail, the straightness of the slide in the horizontal plane, the parallelism of the tail seat movement to the slide, and the radial circular runout of the main shaft and the spindle centering journal. These precision detection items and methods are essential to ensure the accuracy of the workpiece processed by the machine tool.
Positioning accuracy: refers to the position accuracy that can be achieved when the moving parts of the machine tool are moved under the control of the numerical control system. The detection of positioning accuracy includes the detection of linear motion positioning accuracy, repeated positioning accuracy, origin return accuracy and reverse error. These inspection methods are designed to ensure that the machine can accurately reach the predetermined position during the machining process, thus guaranteeing the quality of the machining.
Cutting accuracy: Although not explicitly listed in the search results, according to the definition of machine tool accuracy, cutting accuracy can be understood as a comprehensive inspection of the geometric accuracy and positioning accuracy of the machine tool, which directly affects the final processing quality and dimensional accuracy of the workpiece.
In addition, the description of the national standard covers the measurement methods of straightness, flatness, parallelism, isometric degree, coincidence degree, perpendicularity and rotation, including a variety of measurement techniques such as flat ruler and indicator method, precision level method, and flat plate method. The implementation of these standards helps to ensure the performance and reliability of CNC machine tools to meet different processing requirements.
The role of innovation and cutting-edge technology in top CNC machining
Five-axis linkage technology
The five-axis linkage technology enables the machine tool to achieve flexible rotation in five directions, which can better handle complex curved parts and expand the possibility of processing.
Artificial Intelligence applications
Through artificial intelligence technology, CNC machining system can automatically optimize the processing path, online monitoring parts quality and other functions to improve production efficiency and intelligence.
CNC machining technology is leading the new changes in the manufacturing industry, and it plays an increasingly important role in improving production efficiency, optimizing processing accuracy and promoting customized production.
How do the best CNC machining services prioritize customer needs and feedback?
• Demand analysis: First, communicate with customers and understand their specific processing needs. Including part size, shape, material quantity requirements. Through detailed demand analysis, determine the basic parameters and requirements of the processing program.
• Technical evaluation: Technical evaluation, according to the complexity of parts, processing accuracy requirements, production cycle and other factors, evaluate the appropriate type and configuration of CNC machining centers. Consider which cutting tools, machine power systems and other required auxiliary equipment to use.
• Design and modeling: design and modeling work according to CAD drawings or samples of parts. Create dimensional models with CAD software and ensure that the models are correctly displayed and entered in CAD software.
• Machining path planning: For each part, use CAM software for machining path planning. The corresponding G-code program is generated according to the cutting characteristics of the part geometry, tool selection and cutting conditions.
• Make process plan: Make detailed process plan according to process path planning and G code program. Including process cutting parameters, clamping device design, cutting fluid selection and so on. Ensure maximum machine and tool performance during CNC machining.
• Sample verification and modification: Sample processing according to the process plan, and verification of processing results through measurement and testing. If amendments or adjustments are required, the process plan can be modified and optimized to obtain the best processing solution that meets the quality requirements.Mass production plan: Determine the plan of mass production, including production cycle, material purchase, equipment scheduling and other arrangements. Ensure timely delivery of products and maintain stable production efficiency.
• Monitoring and management: In the process of processing, monitoring and management, including tool damage detection, processing parameter adjustment, equipment status monitoring, etc. Through real-time data analysis and feedback.
Certifications and reputations in the field of CNC machining
Yumei has passed iso9001:2015, iso14001:2015, IATF 16949:2016 certification.
Why is Yumei the first choice for CNC machining?
Our strict quality control and strong manufacturing capacity as well as rich industry experience can effectively ensure the quality and delivery of products, efficient professional team can provide you with timely and effective feedback.
The expertise of our technical team and their commitment to excellence
The company has more than 20 engineering and technical personnel with more than 15 years of work experience, serving customers in various industries such as mechanical manufacturing, electronics, automotive, aerospace, and medical devices. We have a professional design team that can provide personalized design solutions according to customer needs. Our design philosophy is always customer-centric, quality as a guarantee, and innovation as a driving force.
Advanced technology and equipment
The company has precision CNC lathes, multi-task lathe centers, CNC milling machines (3 axis, 4 axis, 5 axis), Swiss lathes (3 axis, 5 axis, 8 axis), automatic lathes, cold forging mills, CNC bending machines, laser cutting machines, welding machines, etc. These equipment play a vital role in our production process, they can accurately machining various parts, To ensure the quality of our products.
