Added value
- Flexible machine concept for deep rolling and roll straightening crankshafts with different strokes, bearing spacing and number of bearings
- Angle-dependent deep rolling to minimize axial runout, and prevent damage to the shoulders
- Straightening of the crankshaft without loss of fatigue strength thanks to optional straightening rolling process
- Measurement of radial runout on max. 3 main bearings
- Self-learning straightening rolling program
- Direct loading in machining position
- Low loading height of 1,100 mm for manual loading; short distance to insertion position (500 mm)
- Radial workpiece orientation
- High process reliability thanks to monitoring of all processing parameters
- Monitoring of the rolling depth (optional)
- Tool breakage monitoring
- New tool design without adjustment
- Fixed rollers can be quickly adjusted to other bearing distances
- Automatic stroke adjustment
Function
The deep rolling process induces residual compressive stresses into the fillet radii, increasing the fatigue limit and thus significantly increasing service life of the product. This technology was innovatively perfected through angle-dependent deep rolling and later roll straightening. Roll straightening reduces the existing radial runout of the crankshaft. From development to the present day, several patents have been granted for the technologies and machine designs. This advanced crankshaft machining technology used today in the automotive industry for compact engines achieves material savings and improves quality and service life. The headstock and tailstock of the machine are manually adjustable so that different crankshaft families can be machined. It is also possible to machine one type of crankshaft with different strokes without adjustment.
Highlights of the 7895
Machine specification
Machine data | |
Machine dimensions (L x W x H) | 4,000 mm x 2,500 mm x 2,200 mm (incl. integrated control panel and hydraulic unit) |
Machine weight | 10 t (incl. auxiliary units) |
Machine center height | 1,100 mm |
General specification | |
Power main drive | 20 kW |
Deep rolling speed | 120 min-1 |
Roll straightening speed | 60 min-1 |
Measuring speed | 30 min-1 |
Deep rolling force, max. | 20 kN |
Workpiece data | |
Bearing center distance of the outer main bearings, max. | 450 mm |
Counterweight radius (depending on stroke and bearing width) | 195 ... 270 mm |
Number of machinable bearings, max. | 5 main bearings, 4 pin bearings |
Main bearing diameter, min. | max. | 30 | 88 mm |
Pin bearing diameter, min. | max. | 30 | 84 mm |
Bearing width, min. | 18.5 mm |
Stroke, max. | 120 mm |
Pitch between main and pin bearing, min. | 29.5 mm |
Our Services
We adhere to the principles of competence, speed, and professionalism in order to provide you with the best possible support for your daily work. As a reliable and globally positioned partner, we support your company and your machine throughout their entire life cycle. We are committed to ensuring your productivity, coupled with the fastest response times and maximum machine availability. This is why HEGENSCHEIDT machines and services are perfectly matched. We provide uncomplicated and fast support for necessary repairs, replacement parts, services, or technical questions. Our range of services and support at the highest technical level is clearly structured and comprehensive.