Size EHP-3K200, machining of piston bores
Branch: Mechanical Engineering
Material: GGG 50
Machine: Horizontal Machinig Center NBH 290
Cycle time: Approx. 240 min.
The machining time on earlier CNC production machines amounted to approx. 733 min.
Machining: The peculiarity at the pump housing is due to
the fact that the piston bores exhibit a coaxiality of
0.03 mm over their entire length.
The first part of the boring consists of a depth of 100 mm starting from the outside edge of the workpiece and the second part begins at a depths of 240 mm.
The required tolerance amounts to H7 with a diameter of 125 mm and is accomplished with a special tool.
The pump housing consists of altogether three piston bores, the roughness depth amounts to Rz = 10 | 
Pump Housing
Pump Housing
Schematic diagramm NBH 290
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With kind approval: Hauhinco, 45549 Sprockhövel, Germany, Manufacturer of high pressure pumps and wage costs of large parts: www.hauhinco.de
