In the world of machining, precision is paramount. Different machining processes offer varying degrees of accuracy, essential for producing components with the desired quality and performance. This article will explore the accuracy tolerance grades achievable with common machining methods.
1.Turning
Turning is a process where a workpiece rotates while a cutting tool moves in a linear or curved path to shape it. This method is typically used on lathe machines to produce cylindrical, conical, and threaded surfaces.
Rough Turning: Achieves an accuracy grade of IT11 with a surface roughness of Ra 20–10μm.
Semi-Finish Turning: Provides an accuracy grade of IT10–IT7, with surface roughness ranging from Ra 10–0.16μm.
Finish Turning: On high-precision lathes with fine diamond tools, accuracy can reach IT7–IT5, and surface roughness can be as fine as Ra 0.04–0.01μm.
2.Milling
Milling uses a rotating multi-edge tool to remove material from a workpiece. It's suitable for machining planes, grooves, and complex shapes like gears and splines.
Rough Milling: Achieves accuracy grades of IT11–IT13, with surface roughness between Ra 5–20μm.
Semi-Finish Milling: Offers an accuracy grade of IT8–IT11, with surface roughness from Ra 2.5–10μm.
Finish Milling: Provides an accuracy of IT16–IT8 and surface roughness of Ra 0.63–5μm.
3.Planing
Planing involves a reciprocating blade to remove material from a workpiece, ideal for shaping external profiles.
Rough Planing: Accuracy of IT12–IT11 with surface roughness of Ra 25–12.5μm.
Semi-Finish Planing: Accuracy grade of IT10–IT9, with surface roughness ranging from Ra 6.2–3.2μm.
Finish Planing: Achieves accuracy of IT8–IT7, and surface roughness between Ra 3.2–1.6μm.
4.Grinding
Grinding uses abrasive tools to remove material, offering high precision and fine surface finishes, typically used for finishing operations.
Precision Grinding: Achieves an accuracy grade of IT8–IT5, with surface roughness between Ra 1.25–0.16μm.
Ultra-Precision Grinding: Accuracy can reach IT5–IT4 with surface roughness of Ra 0.04–0.01μm.
Mirror Grinding: Capable of achieving surface roughness as fine as Ra 0.01μm or less.
5.Boring
Boring enlarges holes or other circular profiles using a single-edged tool, suitable for both semi-finish and finish operations.
General Boring: Accuracy grades of IT9–IT7, with surface roughness from Ra 2.5–0.16μm.
Precision Boring: Achieves an accuracy of IT7–IT6, and surface roughness of Ra 0.63–0.08μm.
Electro permanent magnetic chucks offer numerous benefits for achieving high precision in machining operations:
1. Quick Clamping Without Screws: Electro permanent magnetic chucks eliminate the need for screws, allowing for rapid and secure clamping of workpieces. This feature significantly reduces setup times and improves efficiency.
2. Batch Clamping and Processing: These chucks are ideal for clamping and processing multiple workpieces simultaneously, making them perfect for high-volume production runs and complex machining tasks.
3. Zero-Point Clamping: With zero-point clamping technology, electro permanent magnetic chucks ensure uniform suction force across the entire surface. This consistency translates to high processing accuracy, as the workpiece remains firmly in place throughout the machining process.
4. Power-Off Magnetism Retention: One of the most notable features of electro permanent magnetic chucks is their ability to retain magnetism even when power is off. This characteristic ensures that the workpiece remains clamped securely, reducing the risk of movement or displacement during operation.
In summary, achieving high precision in machining requires selecting the appropriate process and understanding its accuracy capabilities. Electro permanent magnetic chucks enhance these processes by offering quick, reliable clamping with excellent accuracy, making them an invaluable tool for modern machining operations.
Work directly with our experienced team to solve your toughest engineering challenges