Machining solutions for slender shafts

1. What is a slender shaft?

A shaft with a ratio of length to diameter greater than 25 (ie L/D>25) is called a slender shaft. Such as the lead screw, smooth bar and so on on the lathe.

slender shaft

2. The processing difficulty of the slender shaft:

Due to the poor rigidity of the slender shaft and the influence of cutting force, cutting heat and vibration during turning, it is easy to produce deformation, and machining errors such as straightness and cylindricity occur, and it is difficult to achieve the shape and position accuracy and surface quality on the drawing. Such technical requirements make cutting very difficult. The larger the L/d value, the more difficult the turning process is.

slender shaft

3. Key issues in machining slender shafts:

The rigidity of the slender shaft is poor. Due to the influence of many factors such as machine tools and cutting tools, the workpiece is prone to defects such as curved waist drum, polygonal shape, and bamboo joint shape, especially in the grinding process. Generally, the size is poor and the surface is rough. The degree of hardness is 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 process of ultra-fine processing. Long axis key issues.

4. BXD’s solution:

The key technology of turning slender shafts is to prevent bending deformation during processing, for which measures must be taken from fixtures, machine tool aids, process methods, operating techniques, tools and cutting quantities. When faced with the processing of slender shafts, Speed ​​Screen has unique solutions for the formulation of process plans, the selection of equipment, and the design of fixtures. Usually, the machining of slender shafts is done by CNC lathes. For slender shafts with high requirements on concentricity, especially when the design of the parts does not allow U-turn processing, Speed ​​Plus will choose multi-axis processing equipment (such as four-axis CNC lathes or Five-axis centering machine) to process the parts in place at one time.

Post time: Oct-15-2022