Rettificatrice cilindrica esterna VIGERT MG1320E usata in vendita

An external cylindrical grinding machine is a precision machine tool used in manufacturing and machining processes to grind the outer surfaces of cylindrical workpieces to achieve high levels of accuracy and surface finish. Here’s a detailed description of an external cylindrical grinding machine:

1. Machine Bed and Base: The machine typically features a heavy and robust bed or base made of cast iron or another high-strength material. This provides stability and vibration damping during the grinding process.
2. Mola: The heart of the machine is the grinding wheel, which rotates at high speeds. The grinding wheel is responsible for removing material from the external surface of the workpiece to achieve the desired shape and finish. Different types of grinding wheels can be used, depending on the material being ground and the required finish.
3. Workpiece Holding Mechanism: The external cylindrical grinding machine has a workpiece holding mechanism, which can include centers, chucks, or specialized fixtures. These mechanisms secure the cylindrical workpiece in place and ensure it rotates concentrically with the grinding wheel.
4. Wheelhead: The wheelhead holds and controls the grinding wheel’s position and movement. It can be adjusted both axially (in and out) and radially (side to side) to achieve precise grinding results. Some machines feature a swiveling wheelhead for angled grinding.
5. Tailstock (Optional): In some setups, a tailstock may be present to support the opposite end of the workpiece, providing additional stability and precision.
6. Controllo CNC: Many modern external cylindrical grinding machines are equipped with computer numerical control (CNC) systems. These systems allow for precise control of the grinding process, including wheel speed, feed rate, and depth of cut. CNC control also enables the creation of complex profiles and automation of the grinding process.
7. Sistema di raffreddamento: To dissipate heat and remove grinding swarf (metal particles), a coolant system is employed. It delivers cutting fluid to the grinding zone to improve the surface finish and extend the life of the grinding wheel.
8. Dressing Mechanism: Grinding wheels wear over time and may need periodic dressing or truing to maintain their shape and cutting efficiency. The machine may have an automatic or manual dressing mechanism for this purpose.
9. Wheel Balancing System: Proper balancing of the grinding wheel is critical to ensure smooth and vibration-free operation. Some machines are equipped with wheel balancing systems to achieve optimal balance.
10. Caratteristiche di sicurezza: Grinding machines are equipped with safety features, including enclosures, interlocks, and emergency stop buttons, to protect operators from hazards associated with high-speed grinding.
11. Measurement and Control: Precision grinding often requires measurement and control systems to monitor the grinding process and ensure that the workpiece meets specified tolerances.
12. Versatilità: External cylindrical grinding machines can grind a wide range of materials, including metals, ceramics, and plastics. They are used in various industries, such as aerospace, automotive, medical device manufacturing, and toolmaking.
13. Accuracy and Surface Finish: These machines are known for their ability to achieve high levels of precision and surface finish, making them essential for applications requiring tight tolerances and smooth exterior surfaces.