Shafts whose length-to-diameter ratio is greater than 25 (ie L/D>25) are called slender shafts. Such as the screw on the lathe, the feed rod, etc.
Due to the poor rigidity of the slender shaft and the action and influence of cutting force, cutting heat and vibration during turning, it is easy to deform, and there are processing errors such as straightness and cylindricity, and it is difficult to achieve the shape and position accuracy and surface of the pattern. Quality and other technical requirements make cutting very difficult. The larger the L/d value, the more difficult the turning process.
The rigidity of the slender shaft is poor. Due to the influence of many factors such as the machine tool and the tool during the processing, the workpiece is prone to bending waist drum shape, polygonal shape, bamboo shape and other defects, especially in the grinding process, the general size is poor and the surface is rough. The degree of precision is relatively high, and because the workpiece generally requires heat treatment such as quenching and tempering during grinding, the cutting heat during grinding is more likely to cause deformation of the workpiece, etc. Therefore, how to solve the above problems has become a processing ultra-fine The key issue of the long axis.
The key technology of turning slender shafts is to prevent bending deformation during processing. For this reason, measures must be taken from the aspects of fixtures, machine tools, process methods, operating techniques, tools and cutting parameters. When faced with the processing of slender shafts, Sujiawang has unique solutions for the formulation of process plans, equipment selection, and fixture design. Usually, the processing of slender shafts is completed by CNC lathes. For slender shafts with high concentricity requirements, especially when the design of parts does not allow U-turn processing, Suga.com will choose multi-axis processing equipment (such as four-axis CNC lathe or Five-axis centering machine) processes the parts in place at one time.
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