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Clamping is the first and key step in the machining of thin-walled parts. Traditional rigid clamping methods are prone to excessive clamping force on thin-walled parts, causing deformation of parts. In CNC precision machining, flexible clamping can be used, such as vacuum suction cups and elastic jackets. Vacuum suction cups use atmospheric pressure to evenly absorb parts, reducing local stress concentration; elastic jackets can adaptively adjust the clamping force according to the shape of the parts, effectively avoiding deformation caused by excessive clamping force.
The selection of cutting parameters has a great influence on the deformation of thin-walled parts. In CNC machining of medical parts, excessive cutting speed will increase the friction between the tool and the part, generate excessive heat, and cause thermal deformation of the part. Therefore, the cutting speed should be appropriately reduced, while the feed rate should be increased and the cutting depth should be reduced to disperse the cutting force and reduce the force deformation of the part. For example, when machining thin-walled medical parts made of aluminum alloy, the cutting speed is controlled at 150-200 meters per minute, the feed rate is set to 0.1-0.15 mm per revolution, and the cutting depth is kept at 0.1-0.3 mm, which can effectively reduce deformation.
The geometry and cutting performance of the tool also have an important influence on the machining deformation of thin-walled parts. In the machining of precision medical parts, sharp tools with low cutting force should be selected. If a tool with a wiper blade is used, the vibration and cutting force during cutting can be reduced, and the machining surface quality can be improved; at the same time, the selection of suitable tool materials, such as carbide tools, has high hardness and good wear resistance, which can ensure machining accuracy while reducing part deformation caused by tool wear.
Reasonable arrangement of the processing sequence and process route can effectively reduce the deformation of thin-walled parts. Generally, rough processing is carried out first to remove most of the excess so that the stress of the parts is initially released; then semi-finishing and finishing are carried out to gradually improve the processing accuracy. During the processing process, symmetrical processing methods can also be used to make the parts evenly stressed and reduce deformation.
To avoid deformation when processing thin-walled parts, it is necessary to comprehensively consider multiple aspects such as clamping, cutting parameters, tool selection, and processing sequence. In the fields of CNC precision machining, CNC machining of medical parts, precision medical parts machining and other high-precision requirements, only by strictly controlling each processing link can the processing quality of thin-walled parts be ensured to meet production needs.
Zhuhai CTT Technology Co., Ltd. has recently earned a place on the 2026 Forbes China Pioneer Innovators in Industry Development list, thanks to its technological prowess and industrial contributions in high-end equipment manufacturing. Its core technologies and global development capabilities have thus gained recognition from internationally authoritative institutions.
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