The machining accuracy of a vertical lathe is a key indicator to measure its machining quality, usually including dimensional accuracy, shape accuracy, positional accuracy, and surface roughness. The specific accuracy level is influenced by various factors such as machine tool design, manufacturing quality, control system accuracy, tool selection, and processing conditions. The following are some typical accuracy ranges that may be achieved when machining parts with a vertical lathe:
1. Roundness: The roundness error of vertical lathe machining can generally be controlled between 0.01mm and 0.02mm, and some high-precision machine tools can even reach 0.005mm or less.
2. Cylindricity: For cylindrical parts, the cylindricity error of a vertical lathe usually does not exceed 0.01mm, and some high-end models can reach 0.005mm.
3. Flatness: When machining a flat surface, the flatness error of a vertical lathe is about 0.03mm. This value may vary depending on the specific machine performance and processing conditions.
4. Straightness and verticality: These positional tolerances vary depending on the complexity and requirements of the parts, generally within the range of 0.01mm to 0.02mm.
5. Surface roughness Ra: Surface roughness is an indicator for evaluating the surface smoothness of parts. The surface roughness after vertical lathe machining can usually reach Ra1.6 μ m to Ra3.2 μ m. For specific requirements, by using finer cutting tools and process parameters, it can even reach Ra0.8 μ m or lower.
It should be noted that these data are for reference only, and the actual machining accuracy still needs to be determined based on specific machine tool models, workpiece materials, machining processes, and measurement methods. In addition, with technological progress, new types of vertical lathes are constantly emerging, and their machining accuracy is still improving. Some high-end or professional vertical lathes can meet stricter accuracy requirements.