Hydraulic and Pneumatic Drive Technology for Woodworking

BRI_180_Holz II.2_engl
Industrial
Hydraulics
06.08.2002
Electric Drives
and Controls
18:02 Uhr
Seite 1
Linear Motion and
Assembly Technologies
Pneumatics
Hydraulic and Pneumatic
Drive Technology for
Woodworking Machinery
Precise. Robust. Reliable.
Service
Automation
Mobile
Hydraulics
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Log grappler and debarker
on the log handling yard
Flaker
for panel board mills
Veneer lathes
for plywood mills
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Precise, robust, reliable:
Hydraulic and pneumatic drive
technology for the
wood processing industry
Band, circular and curve
saws for sawmills
Higher material throughput, better
utilization of material and narrower
machining tolerances – these are
the demands made by the market
on modern, efficient wood processing concepts.
Like no other supplier, Rexroth
meets these requirements by offering innovative products, industryspecific application know-how and
being the solution provider for its
customers.
Wood processing companies have an
increased demand for production
systems with dynamic, compact and
maintenance-friendly drive systems
that achieve high positioning accuracy and feature a long service life.
Rexroth develops optimum drive
solutions worldwide on the basis of
a broad range of standard and
customized components that are
tailored to the individual industrial
sector and to the requirement of the
individual customer.
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Robust technology
on the log handling yard
The requirement: efficient and
robust machines that work
reliably under any weather
condition
Log grapplers and root strippers on
the log handling yard prepare logs
for subsequent processing. They
require reliable and compact drives
which are characterized by high
power density and maintenancefriendliness – hydrostatic drives by
Rexroth.
Log grappler with hydrostatic drive
Rexroth’s comprehensive product
range meets any power requirement.
This system technology has proven
excellent in numerous mobile and
stationary applications all over the
world. In conjunction with advanced
control technology, stable and efficient drive solutions are realized.
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Log grappler, step feeder, debarker,
circular chop saws and root strippers – with proven drive and open
and closed-loop control systems
by Rexroth
Hydraulic cylinders are used in circular saws for cutting the trunks to
lengths. The cutting movement is
controlled with the help of analog
or digital positioning assemblies and
proportional valves. These are characterized by their high repeatability
and robustness and offer a favorable
price/performance ratio.
Hydrostatic drive
A10VG /A2FM
Standard components for
the electrohydraulic control
of a circular chop saw
4WREE10 direct operated
proportional directional valve
HACD
digital controller card
Position-controlled
cylinder drive in a
chop saw
AVPC
controller module
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Round logs get edges –
with hydraulic drive technology
in the sawmill
Functional units in the sawmill for
processing logs: alignment and
centering units, log carriages in
band saws, chipping units, circular
and curve saws
Band saw
PC
Digital controller assemblies with
field bus interfaces in conjunction
with highly dynamic control valves
allow the precise positioning of
actuators and thus optimum infeed
of the log in downstream machining
units.
These control valves are characterized
by their high-dynamic performance
with low hysteresis and high response
sensitivity. Due to the use of integral
valve electronics, electric cabling is
kept to a minimum. Time-consuming
adjustment of the valve in the case
of a repair is thus a thing of the past.
PLC
HNC 100 digital single-axis control
in log carriages
HNC 100
Band saw unit
HNC 100
Direct oper. high-response control valve
HNC 100
CDH2 mill type cylinder
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24 V
Profiler unit and
circular saw unit
Field bus interface
Electrohydraulic linear axis:
High-response control valve with integral axis control and hydraulic cylinder
with analog position transducer
The positioning process of the chippers in chipping units of saw blades
in circular sawing machines and
curve saws places great demands on
the hydraulic components used.
Based on proven high-response control valve, Rexroth now offers a new
valve generation with integral axis
controller and field bus interface.
The decisive advantages: Via the
field bus the hydraulic axis drive is
directly integrated into the digital
control structure of the machine.
The axis controller can be easily parameterized and the command value
flexibly selected from the higherlevel control. The diagnosis of actual
values and status values (valve temperature, power supply) is handled
via the bus system. Faster error
analysis by means of remote diagnostic systems results in a significant
reduction in downtimes.
Saw line
Standard power unit
ABSAS
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Precisely controlled electrohydraulic linear axis in curve
saws ensures accurate cuts.
The art of cutting curves
3D-Scan-Data
A special type of circular saws are
curve saws for the efficient processing of bent log. Here, high-response
control valves from Rexroth control
the precise adjustment of the saw
blades in dependence upon the material feed. This is a decisive factor
for the quality of the cut material.
SSI
Control variable
SSI
Control variable
Field bus
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Pilot operated high-response control valve
9
Quality through precision:
Veneer lathes ...
Apart from precise block centering,
high-quality veneers can only be
produced with accurate synchronism
of two hydraulic feed cylinders.
This synchronism is ensured by the
2-axis version of the HCN100 control with synchronization controller
and pilot operated high-response
control valves that are fitted directly
onto the low-friction cylinders.
This increases the load stiffness of the
drive, but also the shock load that
acts on the valve components. Here,
Rexroth offers decisive advantages:
The valve electronics is optimized
with regard to shock loads and is
protected by die-cast aluminum
housings.
2-axis control HNC 100
SSI
Control variable
Master
Peeling knife
Slave
Veneer plywood is peeled from
suitable log with the help of a
special peeling knife
Tree trunk
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... and flaker for
oriented strand boards
Knife ring flakers provide the
basic material for oriented strand
boards (OSB): precisely flaked
wood chips.
A constant feed speed is decisive for
the consistent quality of the chips.
The knife ring must be retracted as
fast as possible in order to achieve
maximum productivity of the plant.
Flaker
Electrohydraulic linear axis
Log feeder
A position-controlled hydraulic
cylinder axis by Rexroth with
integrated, absolute and floating
position measuring system, pilot
operated high-response control
valve and single-axis controller
with field bus interface meets the
requirements in an optimum way.
HNC 100 digital
single-axis control
Pilot operated highresponse control valve
on the position-controlled
cylinder of the flaker
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Debarker to sorters –
with pneumatic products
in the sawmill
Functional units in the sawmill where pneumatics could be
used for processing logs: debarker, saw line, resaw, board
edging, cross cutting, trimmer, sorting and sticking/drying.
For the tough sawmill application
Rexroth standard pneumatic cylinders were adapted in a special
version. During decades Rexroth
engineers have been involved in the
development within the sawmill
industry, since they understand the
importance of well working cylinders, valves and systems. Products
and trainings are developed according to the customers needs.
Sawline
Increasing the speed and reducing the stress in the application.
Rexroth has integrated impact and
air cushioning into the cylinders.
Sizing/adjusting in a correct way
the customer will be able to use
this solution in more applications
than ever.
Sizing the cylinder.
At www.boschrexroth.com customers will find online the ideal solution by defining their application
demands interactively. The software will guide them to the correct
choice of e.g. cylinders or external
shock absorbers etc.
Valve serie 581
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Trimmer
Sorter
Defining the speed of a cylinder.
Rexroth has learned that speed is
very hard to estimate and therefore
a speed measuring tool – MecSpeed
– has been developed. Customers
will be able to find cylinder speed
and also to measure cycle times.
MecSpeed works only on Rexroth
cylinders with magnetic pistons.
How to optimize the movement of
the cylinder
Using the impact/air cushioning
will reduce the brake forces. Reducing the air flow in the last part of
the stroke brakes the speed and the
motion will be stopped towards
the impact cushioning. That enables
the user to achieve the ideal pneumatic cushioning. In order to keep
the ideal cushioning, the pressure,
load and speed has to be kept stable.
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Bosch Rexroth.
The Drive & Control Company.
Bosch Rexroth AG offers an unique and comprehensive range
of products and services across
technologies from a single
source in its six fields of technology and service areas – strong
in high-quality individual technologies, combined with highest
application-specific competence
in system packages with integrated complete solutions.
Seite 13
Intelligent hydraulics in
new dimensions
Wherever forces need to be utilized
economically, the advantages of
industrial hydraulics are obvious –
whether it is required to lift and
lower loads smoothly, perform
linear or rotary movements, achieve
constant acceleration, maintain
given speeds, approach positions
exactly, transmit powers or interlink sequences.
system solutions of high quality.
With advanced micro-electronics
Rexroth has made hydraulics even
more powerful.
Rexroth is the technology and market leader in industrial hydraulics
with a comprehensive product
range and distinct application expertise.
For you, Rexroth is the ideal partner for developing highly efficient
machines and production facilities
– from the first point of contact
to commissioning and throughout
the entire life cycle. Teams that
operate worldwide carry out the
complete engineering of your systems and, if requested, up to the
hand-over of turnkey systems and
beyond – service included.
At Rexroth you can select from the
worlds’ largest standard product
range in the field of hydraulics,
application and customer-specific
Thanks to the use of hydraulic drive
and control technology from
Rexroth you will be more competitive than ever.
Rely on service across technologies.
Rexroth integrates all services
for the entire product spectrum
in the field of factory and industrial automation into a single
organization: from the creation
of the product, commissioning,
ongoing operation, to the prolongation of the service life of
your system.
This CD-ROM shows
hydraulic drives in
curve saws
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Bosch Rexroth AG
Pneumatics
Bartweg 13
30453 Hannover, Germany
Postfach 9107 62
Phone: +49 (0)511/2136-0
Fax: +49 (0)511/2136-2 68
www.boschrexroth.com
Bosch Rexroth AG
Industrial Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone: +49 (0)93 52/18-0
Fax: +49 (0)93 52/18-40
information@rexroth.de
www.boschrexroth.com
Bosch Rexroth A/S
Main Office
Gungevej 1
2650 Hvidovre, Denmark
Phone: +45 (36)7744 66
Fax: +45 (36)7708 66
Bosch Rexroth Canada Corp.
490 Prince Charles Drive South
Welland, ON L3B 5R6
Canada
Phone: +1 (9 05)735-0510
Fax: +1 (9 05)735-56 46
Bosch Rexroth Oy
Ansatie 6 b
01740 Vantaa, Finland
Phone: +3 58 (9)84 9111
Fax: +3 58 (9)84 9113 57
Uchida Hydraulics Co., Ltd.
Export Division
5-1 Higashi-Nakanuki
Tsuchiura-Shi
Ibaraki 300-8588, Japan
Phone: +81 (2 98)31-8172
Fax: +81 (2 98)31-8159
Bosch Rexroth Limited
Headquarters
Cromwell Road
St. Neots, Cambs. PE19 2ES
Great Britain
Phone: +44 (14 80)22 32 00
Fax: +44 (14 80)2190 52
Bosch Rexroth spa
Via G. di Vittorio, 1
20063 Cernusco s/N (MI), Italy
Phone: +39 (02)9 23 65-1
Fax: +39 (02)9 23 65-5 00
Bosch Rexroth A/S
Berghagan 1
1405 Langhus, Norway
Phone: +47 (64)86 4100
Fax: +47 (64)86 90 62
Bosch Rexroth AB
Varuvägen 7, Älvsjö
12581 Stockholm, Sweden
Phone: +46 (8)7 27 93 00
Fax: +46 (8)86 60 53
Bosch Rexroth Corporation
Industrial Hydraulics Division
2315 City Line Road
Bethlehem, PA 18017
United States of America
Phone: +1 (610)6 94-83 00
Fax: +1 (610)6 94-84 67
Printed in Germany
RE 00833/08.02