How to create high-precision workpieces with precision CNC milling

The core of precision CNC milling lies in the advanced CNC system. This system is like the "brain" of the machine tool, accurately directing every processing action. It can accurately control the motion trajectory, speed and feed rate of the milling cutter in three-dimensional space according to the pre-written program.

In the medical equipment and parts industry, the requirements for precision are extremely high. For example, the processing of denture models in dental equipment and supplies requires dimensional accuracy to the micron level to ensure that the denture fits perfectly with the patient's mouth. The CNC system can achieve extremely smooth motion control through high-precision interpolation algorithms, so that the milling cutter can accurately cut according to the predetermined path during the processing process, thereby ensuring the shape accuracy of the workpiece. At the same time, it can also monitor the operating status of the machine tool in real time and compensate for errors in the processing process in a timely manner. For example, when machining errors are found due to factors such as thermal deformation of the machine tool or tool wear, the CNC system can automatically adjust the position of the tool or compensate the cutting parameters to ensure the stability of machining accuracy.

To achieve high-precision CNC milling, the structure of the machine tool itself must have high rigidity and high precision. The bed, column, guide rail and other key components of the machine tool need to be made of high-quality materials and undergo precision machining and heat treatment processes to ensure that they have good stability and vibration resistance.

Airy Precision Machinery pays attention to details in machine tool manufacturing and uses high-strength cast iron materials to manufacture the bed. This material has good vibration absorption and stability, and can effectively reduce the impact of vibration on accuracy during machining. The guide rail uses high-precision linear guides or ball screw guides to ensure the straightness and positioning accuracy of the worktable during movement. In addition, the spindle of the machine tool is also one of the key components, which needs to have the characteristics of high speed, high stability and high precision. For the processing of medical equipment and parts, high-speed electric spindles are usually required, whose speed can reach tens of thousands of revolutions or even higher, and can maintain extremely small radial runout and axial movement, providing strong support for high-precision milling.

The tool is the part that directly contacts the workpiece in CNC milling, and its quality and performance directly affect the processing accuracy and surface quality. When selecting a tool, it is necessary to comprehensively consider factors such as the material, shape and processing requirements of the workpiece.

For materials commonly used in the medical equipment and parts industry, such as stainless steel and titanium alloy, it is necessary to select tool materials with high hardness and good wear resistance. For example, carbide tools are a common choice, which have high cutting efficiency and long service life. At the same time, the geometry of the tool is also very important, and different tool shapes are suitable for different processing processes. For example, when processing curved surfaces, a ball-end milling cutter may be required; while when performing plane milling, a flat-bottom milling cutter is more suitable.

In addition, tool management is also an important link to ensure processing accuracy. Airy Precision Machinery has established a strict tool management system, including the procurement, acceptance, storage, use and maintenance of tools. Regularly inspect and sharpen the tool to ensure that the cutting edge of the tool is always sharp and in good condition. At the same time, use an advanced tool monitoring system to monitor the wear of the tool in real time. When the tool is worn to a certain extent, replace it in time to avoid the decrease in processing accuracy caused by tool wear.

Reasonable processing technology planning is an important guarantee for achieving high-precision CNC milling. Before processing, it is necessary to conduct a comprehensive analysis of the workpiece, including the structural characteristics, dimensional accuracy requirements, surface quality requirements, etc. of the workpiece, and then formulate a detailed processing technology plan.

1. Determine a reasonable processing sequence. Generally speaking, rough processing is carried out first to remove most of the excess, and then semi-finishing and finishing are carried out to gradually improve the processing accuracy. In rough processing, larger cutting parameters can be used to improve processing efficiency; in finishing, it is necessary to reduce cutting parameters to ensure processing accuracy and surface quality.

2. Optimize the selection of cutting parameters. The reasonable combination of parameters such as cutting speed, feed rate and cutting depth has an important influence on processing accuracy and efficiency. Through a lot of experiments and practical experience, Airui Precision Machinery has established a complete cutting parameter database, which can quickly and accurately select the best cutting parameters according to different workpiece materials and processing requirements.

3. Cooling and lubrication during processing also need to be considered. Good cooling and lubrication can reduce cutting temperature, reduce tool wear, and improve the quality of processed surface. In the processing of medical equipment and parts, micro-lubrication or dry cutting technology is usually used to avoid contamination of the workpiece by cutting fluid.

In the process of precision CNC milling, strict quality inspection and control are indispensable links. Airui Precision Machinery adopts a variety of advanced detection methods to monitor the workpiece in real time during the processing and inspect the finished product.

During the processing, the online measurement system is used to measure the size of the workpiece in real time. Once the size deviation is found to exceed the allowable range, it is adjusted immediately. At the same time, by detecting the roughness of the processed surface, the cutting parameters are adjusted in time to ensure that the surface quality meets the requirements.

For finished workpieces, high-precision measuring equipment such as three-coordinate measuring instruments are used for comprehensive inspection to ensure that the various indicators such as the size accuracy, shape accuracy and position accuracy of the workpiece meet the design requirements. In addition, the workpiece will be inspected for appearance to ensure that there are no scratches, cracks or other defects on the surface.

Through the above series of measures, precision CNC milling can create high-precision workpieces to meet the strict requirements of precision and quality in the medical equipment and parts industry. In the process of continuous exploration and innovation, companies such as Airy Precision Machinery have continuously improved the level of precision CNC milling technology and made positive contributions to promoting the high-quality development of the manufacturing industry. With the continuous advancement and application of digital technology, it is believed that precision CNC milling will play a greater role in more fields and create more precise workpieces.