MARPOSS M110 measuring machine for crankshafts

MARPOSS M110 measuring machine for crankshafts was manufactured by Italian company MARPOSS S.p.A in 2001. The machine is used to measure SDI 4-cylinder engine shafts in order to eliminate defective details. The machine is equipped with a 10-piece capacity channel for reject parts, a shuttle conveyor taking the rejected parts from pallets and depositing them in the reject channel, and a SIEMENS S7-300 PLC controller.

List of operations performed on crankshafts by MARPOSS M110 measuring machine:

• measurement of diameters in three sections of main journals
• measuring in 1 cross-section of a flange
• measuring the stem diameter in 3 sections
• measuring the concentricity of the main journals
• measuring the concentricity of the shank diameter 28
• measuring the concentricity of the shank diameter 29
• flange concentricity measurement
• measuring the concentricity of major journals
• measurement of cylindricity of main journals

Procedure of crankshaft measurement by MARPOSS machine

1. blocking of a pallet with a workpiece under the measuring station by prestop
2. lifting the engine crankshaft for measurement by a hoist
3. correction of the angular orientation by two guides acting on the first crankpin on the flywheel side
4. closing of the loose blade and the motorised blade
5. entry into the corresponding holes on the workpiece of the mandrels placed on the motorised blade in order to properly draw the workpiece during rotation
6. transfer the measuring cells to the workpiece via the geared motor
7. take measurements after half-rotation of the workpiece
8. return the workpiece after half-rotation with the same orientation as at the time of loading
9. lifting of the measuring cells
10. opening of the blades and counterblades
11. transfer of the workpiece back to the pallet

Parameters of the MARPOSS M110 measuring machine for crankshafts

• PLC controller: SIEMENS S7-300
• electronic measuring device: Marposs E9066
• number of measuring bits: 44
• total number of measurements: 38
• workpiece cycle time: 22 seconds
• cleaning and calibration cycle time: 42 seconds
• time of unloading defective workpieces: 29 seconds
• drive type: electromechanical and pneumatic
• channel capacity for rejected workpieces: 10 pcs.
• air conditioner: RITTAL SK3203-100
• working pressure: 0.45 MPa
• safety pressure: 0.40 MPa
• supply voltage: 24 Vdc
• average air consumption: 6 Nm3/h
• supply voltage: 380Vac three-phase
• frequency: 50 Hz
• maximum power consumption: 5 KVA
• nominal current: 7.5 A
• MARPOSS M110 machine dimensions (L x W x H): 4400 x 3850 x 2600 mm
• machine weight: 3500 kg