Added value
Economic advantages
- Energy saving process
- Low production and manufacturing cost
- High production rate
- Low maintenance cost
- High machine availability
- Less stock allowance (pre-machining)
- Less grinding material (semi-machining)
Flexible machining concept
- High flexibility for part families with varying stroke, journal spacing & journal quantity
- Automatic stroke adjustment
- Quick change-over from one family type crankshaft to another
- Direct loading into machining position and low loading height
- Automatic radial positioning
- Integrated laser measuring probe to check stroke and angular position
- Angle dependent rolling for minimized run-out and reduced shoulder deformation
- Measuring of the total indicated run-out on all main bearings
- Measuring of run-out with reference to centers or to vee-blocks
- Straightening of crankshafts without loss of fatigue strength
- Roll straightening computer with software for all common types of crankshafts
- Self teaching roll straightening program
- High degree of process capability by monitoring all parameters
- Monitoring of fillet penetration depth
- Tool monitoring system
- Tool design for long tool life
Function
Our innovative machine model 7625 combines the deep rolling and roll straightening technology to improve both, the fatigue strength of crankshafts, and the radial run-out of the crankshaft main bearings. Combining these two features in one machine enhances product quality, process capability, and improves process efficiency. After the crankshaft has been loaded, pre-centered, and fixed by using a compensating chuck, the integrated NC-operated spindle positioning system gages the radial position and stroke of the crankshaft and rotates the crankshaft into the correct deep rolling position. The deep rolling units with durable tools automatically encircle the crankshaft main and pin bearings. The fillet radii of these journals are then deep rolled with angle dependent rolling force control. Precision probes measure the TIR at the main bearings. The measured values are relayed to the roll straightening program for evaluation and precise identification of the direction and degree of radial run-out. This data is the basis for the roll straightening process to reduce the run-out. The incorporated process management system monitors the penetration depth within the radii for optimum process reliability.
Highlights of the 7625
Machine specification
Machine data | |
Machine dimensions (L x W x H) | 12,000 mm x 3,600 mm x 3,000 mm |
Machine dimensions incl. maintenance area (L x W x H) | 15,000mm x 6,000 mm x 3300mm |
Centre machining axis above floor level | 1,285mm |
Machine weight (incl. equipment) | ~ 35 t |
Operating voltage | 3 x 400V AC, 50Hz |
Control voltage | 230V AC, 50Hz |
Solenoid valve voltage | 24V DC |
Connected load | ~ 66 kVA |
Working temperature (standard) | 10 ... 40 °C |
General specification | |
Number of deep rolling units, max. | 2 |
Number of deep rolling tools, max. | 4 |
Deep rolling force, max. (type 7625-140kN) | 140kN |
Hydraulic pressure | 140 bar |
Tank capacity hydraulic oil unit | 160 l |
Tank capacity rolling oil centrifuge type filtration system | 315 l |
Coolant hydraulic | 20 l/min |
Workpiece data | |
Weight, max. | 1 t |
Length | 850 ... 4.000mm |
Diameter flange, max. | 90 ... 270 mm |
Diameter main and pin bearing | 90 ... 220mm |
Width main and pin bearing | 40 ... 230mm |
Stroke adjustment | up to 220mm |
Diameter of counterweight, max. | 450mm |
Crank angle | all |
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.