For clamping functions in machine tools

Analog Pressure Adjustment Systemwith Pressure Monitoring

Industrial Hydraulics

Electric Drivesand Controls

Linear Motion andAssembly Technologies Pneumatics

ServiceAutomation

MobileHydraulics

Everything under Control with the Pressure Adjustment System for Clamping Functions in Machine Tools

Function· Enable on· Electrical command value speci-

fied from the computer to themonitoring and control electronics

· Adjustment of the pressure-reduction valve by the DC motoractuator due to the command value

· Simultaneous adjustment of theswitching point

· Enable off· Continously monitoring of the

pressure within the specified accuracy window and acknow-ledgement to the machine control

Features· Analog command value specified

using current or voltage· Automatically maintains clam-

ping pressure if electrical powersupply fails (self-locking actuator)

· Integrated pressure switch function with simultaneous switchpoint adjustments due to clamping pressure adjustment

· Adjustable monitoring limits· Enable function as safeguard

against unintentional adjustment· Actuator with absolute positio-

ning (no reference adjustmentnecessary)

· No energy consumption in adjusted state

· Internal monitoring and diagnosisfunctions

Application example:The clamping pressure on aworkpiece in the lathes canchange even during the ma-chining process. Therefore, asystem is required that can adjust the clamping pressureand check it using a sensor.

Suitable for:· Clamping pressure adjust-

ment via machine control· Clamping processes with multi-

ple pressure adjustment cycles· Pressure adjustment during

machining process· Pressure adjustment while

moving the clamping compo-nent

· Maintaining clamping pres-sure in emergencies

Benefits:· Flexible clamping pressure

adjustment· Reduced cycle times· Shorter changeover time· Increased safety

Pressure command value

Pressure within permitted parameters

Enable

Actual pressure value

Controlelectronics

Monitoringelectronics Position feedback (abs

DC motor actuation

3-way proportional pressure reducing valve with motor adjustment and pressure sensor

Module amplifier with monitoring and control electronics

Machine control Module amplifier

M

a b

TA B

A BP T

P T

P

P

A B T

P

α

M

solute)

Pressure reducing valvewith sandwich plate anddirectional valve

Hydraulic power unit

Sandwich plate with shuttle valve andpressure sensor

Stroke control Rotary transmission Clamping cylinder Clamping chuck

IndustrialHydraulics

Electric Drives and Controls

LinearMotion andAssemblyTechnologies

Pneumatics

ServiceAutomation

Mobile Hydraulics

The Drive & Control CompanyBosch Rexroth offers an unique andcomprehensive range of products andservices across technologies from asingle source in its six fields of tech-nology and service areas.

Intelligent hydraulics in new dimensionsAt Rexroth you can select from theworlds’ largest standard productrange in the field of hydraulics, appli-cation-specific and customized spe-cial system solutions of high quality.With advanced micro-electronicsRexroth has made hydraulics evenmore powerful. Benefit from our ap-plication specialists’ expertise –from engineering to the hand-over ofturnkey systems. Thanks to the useof hydraulic drive and control tech-nology from Rexroth you will be morecompetitive than ever.

Rely on service acrosstechnologiesRexroth integrates all services for theentire product spectrum in the fieldof factory and industrial automationinto a single organization: from imme-diate support, spare parts service, fieldand repair service, retrofit/modern-ization through to training.

Bosch Rexroth AGIndustrial HydraulicsZum Eisengießer 197816 Lohr, GermanyPhone: +49(0)93 52/18-1275Fax: +49(0)93 52/18-401275rainer.drechsler@boschrexroth.dewww.boschrexroth.com

Printed in GermanyRE 62003/06.03