Configuring The Hydraulic Drive - Siemens SINUMERIK 840D Description Of Functions

2 Configuring

2.3 Configuring the hydraulic drive

2.3 Configuring the hydraulic drive
General
2.3.1 Cylinder selection
Piston and rod
diameter
Stroke length
2-30
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
Hydraulic drives are generally configured by technical sales and marketing per-
sonnel from hydraulics supplier Bosch. Bosch personnel are supported by the
"HYDRO 2" calculation program (for internal use only). The data supplied by the
customer on the questionnaire described in Section 2.1.2 serve as initial dimen-
sioning information.
Please refer to Appendix A for a description of hydraulic components.
The hydraulic drive is configured in the sequence of steps described below.
The piston and rod diameters are calculated according to Pascal's theorem (see
below) on the basis of the necessary pressure and tensile forces F and a stan-
dard pressure value of P=40...100 bar for machine tools (a maximum pressure
setting of 350 bar is permitted).
p =
The force value calculation must include friction and acceleration forces
as well as the actual feed force. Pistons and rods with the following standard
diameter dimensions are available:
Table 2-2 Typical cylinder data
Designation
Piston ∅
25
Rod ∅ Standard
12
Rod ∅ Optional
18
The stroke is identical to the working stroke of the drive, with some additional
safety reserves.
F
A
Diameter
32 40 50 63
14 18 22 28
22 28 36 45
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02.99
80 100 125
36 45 56
56 70 90