How To Turn a Slender Shaft Workpiece?

How To Turn a Slender Shaft Workpiece?

• Admin
• 2024/8/26

Turning of slender shafts is a relatively common machining method in machining. The slender shaft refers to the shaft whose length to diameter ratio l / d ≥ 20. When l / d ≥ 100, it is called a slender shaft. Due to the poor rigidity of the slender shaft, the cutting force, the vibration and thermal deformation generated during turning are large, and it is difficult to achieve the shape accuracy and surface on the pattern. These technical requirements such as quality make machining difficult. By adopting appropriate fixture methods and advanced processing methods, and choosing reasonable tool angles and cutting parameters, the processing quality requirements of slender shafts can be guaranteed.

So what are the difficulties in processing slender shafts and what corresponding measures should be taken? Let's list them one by one as follow:

Problem: The rigidity of the slender shaft is very poor, and it is prone to bending deformation and vibration under the action of cutting force and gravity;

Solution: Increase the rigidity and reduce the bending deformation of the workpiece.

• Adopt the center frame and follower to improve the rigidity of the workpiece.
• Increase the turning angle of the turning tool and reduce the back force.
• The reverse feed cutting method is adopted to make the workpiece subject to axial tension and eliminate vibration.

Problem: During the cutting process, the workpiece will have a large heat elongation, which will aggravate the bending deformation, and in severe cases will cause the workpiece to jam between the tops;

Solution: Solve the thermal deformation and elongation of the workpiece.

• Use the elastic rotary center to compensate the thermal deformation and elongation of the workpiece.
• Add sufficient cutting fluid to lower the cutting temperature.
• Keep the tool sharp and reduce the friction and heating between the turning tool and the workpiece.

Problem: The time required for one feed during processing is longer, and the tool wear is greater.

Solution: Choose a CNC cutting tool reasonably.

• Choose hard alloy materials with good wear resistance.
• Reasonably choose the geometry of the turning tool.
• Accurately sharpen tools to reduce the surface roughness of the tools.

As a professional supplier of CNC cutting tools, including inserts and tool holders, Our provides some suggestions for you to choose the requirements and geometric parameters of the external turning tools for slender shaft:

How To Turn a Slender Shaft Workpiece

External turning inserts require small cutting force, reduced back force, low cutting temperature, sharp cutting edge, smooth chip removal, and long tool life.

• PNCU Insert
• CNMG120408-PM YBC152
• RPMW1003MO JC5118
• GMM3020-MT PR930
• CNMG120408N-EX AC520U