Y.O.M. 2002

Machine data for HEGENSCHEIDT 7893
– burnishing speed: 120 rpm
– straightening rolling speed: 30 rpm
– stroke of the main external bearings of the crankshaft: max. 700 mm
– number of rollers pressing devices: 9 pieces
– number of rolls when increasing or decreasing the pressing force: 3
– number of rolls at the working pressing force: 6
– maximum number of main bearings: 7
– maximum number of needle bearings: 6
– minimum spacing between the main and needle roller bearings: 29.5 mm
– minimum bearing diameter: 30 mm
– maximum bearing diameter: 82 mm
– minimum width of the bearings: 18 mm
– maximum stroke: 120 mm
– sleigh diameter: 195 mm
– amount of filling the hydraulic system: 160 l
– working pressure of the hydraulic system: 9/16 MPa
– hydraulic system cooling capacity: 7 kW
– cooling water consumption in the hydraulic system: 3.8 m3 / h
– filling quantity of the rolling oil unit: 30 l
– operating pressure of the oil unit for rolling: 1.5 MPa
– oil consumption for rolling: 0.12 cm3 / min
– filling quantity of the rolling oil tank: 260 l
– working pressure of the rolling oil tank: 0.5 MPa
– sound pressure level: 62 dB (A)
– peak sound pressure value: 96.7 dB (C)
– return pump capacity: approx. 25 l / min
– compressed air working pressure: 0.4 MPa
– compressed air consumption: 10 m3 / h
– maximum working pressure of cooling water: 3 MPa
– cooling water consumption: 4.8 m3 / h
– mains voltage / connection voltage: 230/400 V
– voltage tolerance: ± 15%
– network frequency: 50 Hz
– rated current: 50 A
– connected load: 35 kVa
– control voltage: 230 VAC
– valve voltage: 24 VDC
– PLC input and output voltage: 24 VDC
– weight of the HEGENSCHEIDT 7893 machine with all equipment: 13,700 kg

Machine equipment HEGENSCHEIDT 7893
– CNC control: SIEMENS Sinumerik
– hydraulic power unit: REXROTH
– rolling oil filtration system
– device for cleaning instruments and tools
– tool lubrication system
– protective housing and operator’s platform
– device for kneading with rollers
– tailstock with a spindle sleeve

HEGENSCHEIDT 7893 crankshaft compacting and straightening machine was manufactured in 2002 by HEGENSCHEIDT-MFD GmbH & Co. KG in Germany. The machine is designed for roll-pressing and straightening rolling of crankshafts in order to increase the fatigue strength of crankshafts. Own compressive stresses are introduced in the area of ​​the fillets, resulting in the desired strength increase. The material is strengthened with a simultaneous increase in surface hardness, and the dynamic load capacity of the crankshaft is significantly increased.

The patented structure of the machine allows for mounting up to 13 devices for roller pressing. All devices for processing the bearings are suspended by means of pneumatic cylinders with compensation of weight. The devices with open main bearings (on the journal or flange side) are axially supported by side supports. The crankshaft burnishing and straightening functions can be controlled individually for each implement and each bearing. Depending on the needs, the appropriate devices should be set in working or parking positions. Connections for the hydraulic system, the rolling oil system, the pneumatic system and measuring transducers for force and position sensors are integrated in the devices. All connections are secured with covers and cable ducts.

The machine is controlled by a SIEMENS Sinumerik CNC controller. The kneading speed is 120 rpm and the straightening rolling speed is 30 rpm. There are 6 rolls for the working force, while for increasing or decreasing the compression force there are 3 rolls. The minimum bearing diameter is 30mm and the maximum bearing diameter is 82mm. The total weight of the HEGENSCHEIDT 7893 crankshaft flattening and straightening machine is 13,700 kg.