There are machining technologies that are either indispensable in terms of quality or unbeatably efficient. Sometimes both are true. Cross grinding (also known as honing) undoubtedly falls into both categories. This is because it is well known that cross grinding with typical grinding removal rates is ideal for µm-precise bore machining. In addition, Sunnen's cross-grinding machines, tools and automation solutions are the most cost-effective solution for many ultra-fine machining tasks. For example, a Sunnen cross-grinding solution is many times faster than internal cylindrical grinding, especially in unfavorable diameter/length ratios.

Another advantage of bore machining using Sunnen cross-grinding machines is the flexibility of use. This is because shrinking batch sizes and the increasing variety of parts are forcing companies to use more and more flexible machining technologies. Cross grinding is already being used in many companies where conventional turning, hard turning, drilling or internal cylindrical grinding have reached their limits.

Best options for precise results

Hommel Präzision opens up new possibilities in bore machining with Sunnen cross grinding systems. For the analysis and optimization of machining challenges and the design of manufacturing solutions, Hommel Präzision has a well-equipped cross-grinding laboratory in which all standard Sunnen horizontal and vertical machines with machining diameters from 1.5 mm to 203 mm are available. The application and sales technicians use these on a daily basis for machining tests, training and machine demonstrations.

Due to ever increasing customer requirements for components, production tolerances are becoming ever tighter and the demands on the surface structures of components ever greater.

Whereas in the past only_Ra or _Rz values were in demand, today more and more applications with plateau surfaces are required, for example.

Presenting customers with machining solutions for high-precision components requires the expertise of specialists. These machining tests and demonstrations are always carried out in the cross-grinding laboratory using the customer's own components, thus providing direct proof that the Sunnen machines achieve the best results for the respective application.

Those who manufacture precisely must also control precisely

In addition to the cross-grinding machines, the employees have high-precision Sunnen bore gauges at their disposal, with which the test components can be measured directly on the machine in the diameter range from 1.7 mm to 304 mm.

Depending on the requirements, the test components are measured in the measuring room on the in-house form tester. This allows, for example, cylindrical shape, parallelism, squareness and roundness to be determined with µm accuracy. In addition, all common roughness parameters can be determined on the modern surface measuring device.

Professional maintenance and repair of measuring devices

Accurate production requires precise measurement of components. To ensure this, Hommel Präzision GmbH offers its customers

offers an all-round service. The measuring devices are repaired with Sunnen-specific expertise, resulting in numerous benefits for customers. In addition to cost savings due to fewer rejects in production, higher process reliability and a lower risk of failure are generated.

In addition to repairing measuring devices, Sunnen tools are also repaired to ensure that customers can always achieve maximum cutting performance with their tools.

After a thorough damage assessment and documentation of the actual condition of the measuring devices/tools on a service control card, they are completely dismantled, cleaned in an ultrasonic bath, defective components are replaced, reassembled and then thoroughly checked.

The inspection results are presented in measuring equipment control cards. Only when the measuring devices/tools fully meet the requirements are they released for dispatch together with the service and measuring equipment control cards.