Rottler modernises a Pegard boring mill
Mudersbach: We would like to give you an exciting insight into the retrofit of a Pegard boring mill, which is now fully operational again after a comprehensive 4-month general overhaul. We took the opportunity not only to modernise the machine technically, but also to bring the safety concept up to date in accordance with CE and operator specifications.
The boring mill from the 1990s underwent an extensive overhaul to make it fit for the requirements of modern production. The highlights at a glance:
- Conversion of the X-axis to hydrostatics
- Modern cooling lubricant system with adjustable high-pressure pump
- Extension of the vertical travel (Y-axis) by 500 mm
- Overhaul of the headstock
- New safety concept
- New rotary sliding table with higher load capacity
- Heidenhain TNC 640 CNC control technology with new sensors and actuators
Background: Machines that were built several decades ago often no longer meet modern standards in terms of precision, efficiency and safety.
- State-of-the-art technology
- Competitive
- Safety as the top priority
- Ensuring the availability of spare parts
- Longevity and reduction of downtimes
Why hydrostatics?
In conventional mechanical guide systems with oil or grease lubrication, friction between the moving parts causes unwanted wear, which can affect the accuracy and service life of the machine. Hydrostatic guides, on the other hand, work with a thin film of oil between the moving parts. This film ensures that the parts move practically without direct contact with each other, which significantly reduces friction. The switch to hydrostatic ensures excellent, precise and durable guidance of the machine without negative effects such as stick slip. Without mechanical friction in the guide, wear is reduced to a minimum, effectively extending the service life. The picture on the right shows the oil guides and the milled pockets of the hydrostatic guide, each of which is supplied by a pump.
Highlight: Extension of the Y-axis
The extension of the Y-axis gives the company the flexibility to process a wider range of workpieces on the same machine. For this purpose, we manufactured an attachment with the same contour as the guideways of the column and firmly connected it to the column. The guideways were then machined and ground together to ensure maximum accuracy and stability.
- Increase in production capacity
- Time and cost savings
- Optimised planning options
Why a new Heidenhain TNC 640 control?
- Simple programming and extensive machining and probing cycles
- High-end performance for perfect surfaces and maximum accuracy
- Improved user-friendliness
- Complex geometries and maximum repeat accuracy
- Optimised process monitoring
The cooling lubricant system
- Optimised cooling of tools through internal coolant supply (IKZ)
- Increased machining efficiency
- Adjustable pump up to 50 bar
- Increased tool service life and therefore reduced costs
- Service-friendly due to installation at floor level
- Advanced filtration system
