Different types of turning
Exterior and interior turning
Evatec-tools offers a wide range of external and internal turning tools for turning, profiling and facing operations:
- Tool holder
- Angle of attack
- Standard or HP watering nozzle
- Type of insert (grades and geometry)
Our technicians are able to advise you on the clamping system for the insert in the tool holder, depending on the type of operation to be performed and the size of the part.The goal is to achieve optimal chip control and surface finish. Choosing the right tool will prevent burrs and vibrations.
For large workpieces requiring a high degree of robustness, toolholders with negative inserts are recommended. For sticky materials with delicate chip evacuation, positive geometries are available.
Heavy duty turning
This type of turning involves the machining of large parts on robust and powerful machines requiring large chip removals, on irregular surfaces, with large, variable cutting depths of up to 20 mm.
In order to secure the process and to control the swarf, evatec-tools offers well thought-out geometries, combined with tough, heat-resistant grades, to reduce machine downtime and to achieve an excellent surface finish.
The machining of hard material parts, such as steels with a hardness of 55-65 HRC, is still often done by grinding. Hard turning, combined with adapted cutting geometries and grades, allows for a reduction in machining time.
Hard turning is characterized by low cutting depths and feed rates and by high specific cutting forces. Very high temperatures occur during the work (between 500° and 1500° depending on the case) at the interface of the cutting edge and the workpiece.
The development and improvement of various cutting materials such as ceramics, CBN and micrograin carbides have made it possible to replace the grinding process with the machining of hard materials with defined cutting geometries. For example, ceramics and CBN are used primarily for turning, while solid carbide tools with a micrograin structure are also used for drilling and milling.