EP1154075A2 - Verfahren zur Strassenfräsverwaltung und Strassenfräsgerät zur Durchführung dieses Verfahrens - Google Patents

Verfahren zur Strassenfräsverwaltung und Strassenfräsgerät zur Durchführung dieses Verfahrens Download PDF

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Publication number
EP1154075A2
EP1154075A2 EP01111159A EP01111159A EP1154075A2 EP 1154075 A2 EP1154075 A2 EP 1154075A2 EP 01111159 A EP01111159 A EP 01111159A EP 01111159 A EP01111159 A EP 01111159A EP 1154075 A2 EP1154075 A2 EP 1154075A2
Authority
EP
European Patent Office
Prior art keywords
data processing
machine
road
inclination
processing systems
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01111159A
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English (en)
French (fr)
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EP1154075A3 (de
Inventor
Danny Ray Davis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Prodotti Stradali SRL
Original Assignee
Bitelli SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bitelli SpA filed Critical Bitelli SpA
Publication of EP1154075A2 publication Critical patent/EP1154075A2/de
Publication of EP1154075A3 publication Critical patent/EP1154075A3/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/004—Devices for guiding or controlling the machines along a predetermined path
    • E01C19/006—Devices for guiding or controlling the machines along a predetermined path by laser or ultrasound
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums

Definitions

  • the invention concerns a method for the integrated management of the parameters regarding the cutting depth of road surfaces and a road scarifier suitable for implementing said method.
  • road scarifiers are machines equipped with a cutting drum that sinks into the road surface for a given depth, in such a way as to remove the asphalt and prepare a bed suitable for the laying of a new asphalt blanket.
  • the road scarifier must remove the road surface until reaching a given depth, for example 10-15 cm with respect to the road level.
  • a given depth for example 10-15 cm with respect to the road level.
  • it is necessary to remove the asphalt in a different manner from the right to the left side of the road for example when a road with sloping sides for the drainage of rain must be obtained, that is, a road whose sides are lower with respect to its centre to avoid the stagnation of water.
  • the scarifier must cut the road deeper on one side than on the other.
  • the cutting drum must not be parallel to the road surface, but inclined of an angle ⁇ with respect to the same.
  • the known road scarifiers use copying devices, like for example tracer points that cooperate with a wire tensioned through a series of pegs arranged on the road side.
  • the tracer point is constantly in contact with the tight wire and when this contact is lost an automatic correction of the machine position takes place by means of hydraulic jacks that operate on the frame, in such a way as to vary the working depth of the cutting drum and restore the contact between tracer point and wire.
  • the machine is equipped with a long linear bar positioned at the side of the machine itself and resting on the road surface, in such a way as to define a median plane that is followed by the machine in operation.
  • road scarifiers are provided either with sensors positioned on the left and on the right side of the machine and suitable for measuring the distance between the sensor and the cutter contact surface, and with devices controlling the inclination of the cutting drum.
  • the right and left scarification depth control devices cannot exchange information in order to correct any deviation from the preset parameters.
  • the aim of the present invention is to overcome the limitations of the known technique.
  • the main aim of the invention is the implementation a road scarifier for the cutting of road surfaces that constantly ensures that the work of the cutting drum on the road surface is performed in such a way as to obtain the desired profile, and therefore following preset parameters.
  • Said profile should also be automatically respected by the machine, which means that during the operation of the machine automatic correction in response to deviations from the preset parameters should be possible.
  • Another object of the invention is to facilitate the work for the operator of the machine, by grouping on a single panel the controls regarding the parameters of the scarification profile to be obtained, that is, the right depth, left depth and inclination parameters of the road surface removed.
  • a further aim to be achieved is that the scarifier control system should make it possible to operate the machine by setting only two of the three parameters of the scarification profile to be obtained, while the third parameter should be derived from the other two.
  • Another aim of the invention is the implementation of a machine equipped with a device that, whenever a deviation from the preset parameters takes place, intervenes with an automatic correction procedure acting directly on the components that vary the position of the machine and of the cutting drum with respect to the road surface on which the work is being performed.
  • the object of the invention includes also the road scarifier operation method for the removal of asphalt from road surfaces through the cutting of the asphalt with preset depth and inclination, comprising a presetting cycle for the definition of the parameters to be obtained and a working cycle according to the contents of the independent claim regarding said method.
  • the road scarifier indicated as a whole by 1 in Fig. 1, is provided with a frame 2 supported by tracks 3, 4, 5 and 6 , on which the same number of jacks indicated by 7, 8, 9 and 10 rest, as shown in Fig. 2.
  • the road scarifier is equipped with a cutting drum 11 suitable for working on the road surface 12 according to the position of the hydraulic jacks that lift or lower the frame 2 as required by the work programme.
  • road scarifiers are generally provided with front jacks 8 and 9 operated by a single hydraulic control, so that they act together as if they were a single central jack positioned at the front of the machine, as shown in the hydraulic diagram of Fig. 3.
  • these are controlled independently of each other and can have different configurations, so that the cutting drum 11 can be parallel to the road surface, or inclined as much as necessary to obtain the scarification according to a given profile, for example with sloping sides, in such a way as to obtain an asphalt covering having certain specific characteristics.
  • the road scarifier 1 is provided on both sides with sensors, indicated by 13 and 14 , respectively, that can be seen in Fig. 2 and 1.
  • sensors can be ultrasound sensors or reflection sensors and serve to measure the distance between said sensors and the road bed.
  • the sensors 13 and 14 send their signals to first programming and controlling data processing systems indicated by 16 and 17 , respectively. More particularly, the sensors 13 send their signals to the data processing system 16 and the mean of said signals is made and shown on a display 161 .
  • the sensors 14 send their measure signals to the data processing system 17 , which shows the mean of the readings on the display 171 .
  • the road scarifier is also provided with a frame inclination sensor indicated by 18 , which in fact shows the inclination angle ⁇ of the frame with respect to the horizontal line of the machine. Since the cutting drum 11 is integral with the frame 2 , the inclination of the frame obviously corresponds to the inclination of the cutting drum, which is the inclination that is actually relevant to the work performed by the machine. Even in this case the inclination sensor 18 is connected to a further first data processing system 19 that shows the measured inclination, expressed in degrees, on the display 191 .
  • the invention it is possible to set two of the three parameters necessary for the setting of the scarification in the first data processing systems 16, 17 or 19 , since the third parameter can be derived from the other two. More particularly, it is possible to set the left and right scarification depth parameters in the data processing systems 16 and 17 through the displays 162 and 172 , respectively.
  • the angle ⁇ on the display 192 of the data processing system 19 will be equal to 0.
  • the value of the angle ⁇ will be derived directly from the difference between the two values set.
  • the inclination angle value will be set as a consequence of the other two.
  • each data processing system 16, 17 or 19 carries out a comparison between the scarification depth or angle set and the corresponding readings, by means of an electronic processor. Consequently, a difference signal ⁇ S, ⁇ D and ⁇ is sent out by the first data processing system 16 , or 17 , or 19 , respectively.
  • These difference signals are received by a second data processing system PLC, indicated as a whole by 20, which processes the signals received and sends control signals to hydraulic left and right actuators, indicated by 21 and 22, respectively, which control the hydraulic cylinder 10 and the hydraulic cylinder 7, respectively, so that the lifting or lowering of each one of the hydraulic cylinders tends to reduce to zero the difference signals ⁇ received by the first data processing systems 16, 17 and 19 .
  • the road scarifier object of the invention controls all the parameters regarding the scarification carried out by the cutting drum and adapts the position of the machine through the operation of the hydraulic jacks, in such a way as to follow the desired scarification profile.
  • the first step necessary to carry out the scarification according to preset parameters as described herein is represented by the setting of the parameters, which is followed by the actual scarification process.
  • the hydraulic jacks of the machine For the parameter setting cycle, first of all it is necessary to operate the hydraulic jacks of the machine, in such a way as to lift the frame with the maximum extension, that is, at the maximum distance of the same from the ground, after which the jacks must be lowered until the cylinder rests on the ground.
  • the measured values shown by the displays 162, 172 and 192 are read and then set to zero by means of the reset buttons positioned on each first data processing system, indicated by 163, 173 and 193 .
  • the desired values are set in two of the three displays 162, 172, 192 belonging to the data processing systems 16, 17 and 19 , according to one of the combinations shown by the table in Fig. 7.
  • the value LS can be set in the display 162 , the value LD in the display 172 , and the angle ⁇ will be set in the display 192 as a consequence of the other two settings.
  • the sensors 13, 14 and 18 transmit the scarification depth and inclination angle values measured to the respective data processing systems. These values are compared with the set depth and inclination angle values and, if there is a difference between the values read and those set, the first data processing systems send out a difference signal ⁇ S, ⁇ D or ⁇ .
  • a data processing unit for example a PLC indicated by 20 , which sends out one or two signals, 21 and 22 , that operate the hydraulic actuators 7 and 10.
  • Said cylinders are operated in order to obtain a variation in the position of the frame 2 , in such a way as to reduce to zero the difference ⁇ 5, ⁇ D or ⁇ signalled by the first data processing systems 16, 17 and 19 .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Road Repair (AREA)
EP01111159A 2000-05-11 2001-05-10 Verfahren zur Strassenfräsverwaltung und Strassenfräsgerät zur Durchführung dieses Verfahrens Withdrawn EP1154075A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000VI000092A IT1315336B1 (it) 2000-05-11 2000-05-11 Metodo per la gestione integrata dei parametri relativi alla fresaturadi superfici stradali e macchina scarificatrice realizzante tale
ITVI000092 2000-05-11

Publications (2)

Publication Number Publication Date
EP1154075A2 true EP1154075A2 (de) 2001-11-14
EP1154075A3 EP1154075A3 (de) 2002-07-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01111159A Withdrawn EP1154075A3 (de) 2000-05-11 2001-05-10 Verfahren zur Strassenfräsverwaltung und Strassenfräsgerät zur Durchführung dieses Verfahrens

Country Status (3)

Country Link
US (1) US20020047301A1 (de)
EP (1) EP1154075A3 (de)
IT (1) IT1315336B1 (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10203732A1 (de) * 2002-01-30 2003-08-21 Wirtgen Gmbh Baumaschine
WO2007031531A1 (de) * 2005-09-12 2007-03-22 Wirtgen Gmbh Selbstfahrende baumaschine, sowie hubsäule für eine baumaschine
WO2007125017A1 (de) * 2006-04-27 2007-11-08 Wirtgen Gmbh STRAßENBAUMASCHINE, NIVELLIEREINRICHTUNG SOWIE VERFAHREN ZUM REGELN DER FRÄSTIEFE ODER FRÄSNEIGUNG BEI EINER STRAßENBAUMASCHINE
EP1860241A3 (de) * 2006-05-22 2008-06-04 WIRTGEN GmbH Selbstfahrende Baumaschine, sowie Verfahren zum Bearbeiten von Bodenoberflächen
WO2008077963A1 (de) 2006-12-22 2008-07-03 Wirtgen Gmbh Strassenfräsmaschine sowie verfahren zur herstellung der parallelität des maschinenrahmens zum boden
EP1936034A3 (de) * 2006-12-22 2011-03-30 Wirtgen GmbH Straßenbaumaschine sowie Verfahren zur Messung der Frästiefe
CN102776827A (zh) * 2012-08-09 2012-11-14 三一重工股份有限公司 一种铣刨机及其铣刨深度监控装置
US8757729B2 (en) 2011-12-22 2014-06-24 Caterpillar Paving Proudcts Inc. Automatic rear leg control for cold planers
US8874325B2 (en) 2011-12-22 2014-10-28 Caterpillar Paving Products Inc. Automatic four leg leveling for cold planers
US8973688B2 (en) 2011-12-20 2015-03-10 Caterpillar Paving Products Inc. Suspension system and control method for track-propelled machines
US8998344B2 (en) 2012-10-19 2015-04-07 Wirtgen Gmbh Self-propelled building machine
US9303761B2 (en) 2014-05-20 2016-04-05 Caterpillar Forest Products Inc. Forestry machine speed controls
US9309632B2 (en) 2014-04-04 2016-04-12 Wirtgen Gmbh Automotive construction machine and method for controlling an automotive construction machine
CN106149537A (zh) * 2016-08-22 2016-11-23 徐州徐工筑路机械有限公司 一种铣刨机械液压行走驱动防滑系统
CN106320155A (zh) * 2016-10-27 2017-01-11 西安海迈重工机械有限公司 可移动式操作控制系统、驾驶室及路面铣刨机
DE102018127222A1 (de) 2018-10-31 2020-04-30 Wirtgen Gmbh Straßenfräsmaschine und Verfahren zum Steuern einer Straßenfräsmaschine

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US20080153402A1 (en) * 2006-12-20 2008-06-26 Christopher Arcona Roadway grinding/cutting apparatus and monitoring system
US20120203428A1 (en) * 2011-02-08 2012-08-09 Honda Motor Co., Ltd Road profile scanning method and vehicle using side facing sensors
US8794867B2 (en) 2011-05-26 2014-08-05 Trimble Navigation Limited Asphalt milling machine control and method
DE102012012397A1 (de) 2012-06-25 2014-04-24 Wirtgen Gmbh Selbstfahrende Baumaschine
DE102012015346A1 (de) * 2012-08-06 2014-02-20 Wirtgen Gmbh Selbstfahrende Baumaschine
EP2789739A1 (de) * 2013-04-10 2014-10-15 Leica Geosystems AG Bausatz für eine Automatische Spurausrichtungssteuerung und Verfahren zur automatisierten Spurausrichtung
DE102013010298A1 (de) 2013-06-19 2014-12-24 Bomag Gmbh Baumaschine, insbesondere Straßenfräse, und Verfahren zum Ausgleichen von Bodenunebenheiten für eine solche Baumaschine
DE102014017892B4 (de) 2014-12-04 2019-03-21 Wirtgen Gmbh Selbstfahrende Baumaschine und Verfahren zum Betreiben einer selbstfahrenden Baumaschine
DE102015014573B4 (de) 2015-11-12 2020-03-19 Wirtgen Gmbh Selbstfahrende Bodenfräsmaschine und Verfahren zum Bearbeiten einer Verkehrsfläche
DE102017005015A1 (de) * 2017-05-26 2018-11-29 Wirtgen Gmbh Maschinenzug aus einer Straßenfräsmaschine und einem Straßenfertiger und Verfahren zum Betreiben einer Straßenfräsmaschine und eines Straßenfertigers
US10266996B2 (en) * 2017-08-30 2019-04-23 Caterpillar Paving Products Inc. Methods and systems for operating a milling machine
US10829899B2 (en) * 2018-09-21 2020-11-10 Caterpillar Paving Products Inc. Partial-cut-width sensing for cold planar
US11679639B2 (en) * 2018-10-23 2023-06-20 Caterpillar Paving Products Inc. Systems and methods for controlling ground inclination of rotary cutting machines
US11746482B2 (en) 2018-10-23 2023-09-05 Caterpillar Paving Products Inc. Inclination control for construction machines
DE102018222875A1 (de) * 2018-12-21 2020-06-25 Wirtgen Gmbh Selbstfahrende Baumaschine und Verfahren zum Bearbeiten eines Bodenbelags
US11041276B2 (en) 2019-03-27 2021-06-22 Caterpillar Paving Products Inc. Tool exposed status and lockouts
US10876260B2 (en) 2019-03-27 2020-12-29 Caterpillar Paving Products Inc. Accurate tool depth control
US10844557B2 (en) * 2019-03-27 2020-11-24 Caterpillar Paving Products Inc. Tool depth setting
US11168717B2 (en) * 2019-12-23 2021-11-09 Caterpillar Paving Products Inc. Actuator calibration based on a fluid level of a fluid tank

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US4041623A (en) * 1975-09-22 1977-08-16 Miller Formless Co., Inc. Grade cutting machine
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Cited By (54)

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Publication number Priority date Publication date Assignee Title
DE10203732A1 (de) * 2002-01-30 2003-08-21 Wirtgen Gmbh Baumaschine
US7422391B2 (en) 2002-01-30 2008-09-09 Wirtgen Gmbh Road milling machine with optimized operation
US7905682B2 (en) 2002-01-30 2011-03-15 Wirtgen Gmbh Road milling machine with optimized operation
AU2006290717B2 (en) * 2005-09-12 2011-01-27 Wirtgen Gmbh Automotive construction engine and lifting column for a construction engine
WO2007031531A1 (de) * 2005-09-12 2007-03-22 Wirtgen Gmbh Selbstfahrende baumaschine, sowie hubsäule für eine baumaschine
US9656530B2 (en) 2005-09-12 2017-05-23 Wirtgen Gmbh Automotive construction machine, as well as lifting column for a construction machine
EP1924746B1 (de) 2005-09-12 2016-04-27 Wirtgen GmbH Selbstfahrende baumaschine mit hubsäule
US9010871B2 (en) 2005-09-12 2015-04-21 Wirtgen Gmbh Automotive construction machine, as well as lifting column for a construction machine
CN101263264B (zh) * 2005-09-12 2012-03-21 维特根有限公司 自驱动建筑机械以及用于建筑机械的提升柱
JP2009508026A (ja) * 2005-09-12 2009-02-26 ヴィルトゲン ゲゼルシャフト ミット ベシュレンクテル ハフツング 自動車型建設装置、及び建設装置の昇降カラム
US8113592B2 (en) 2005-09-12 2012-02-14 Wirtgen Gmbh Automotive construction engine and lifting column for a contruction engine
US8511932B2 (en) 2006-04-27 2013-08-20 Wirtgen Gmbh Road construction machine, leveling device, as well as method for controlling the milling depth or milling slope in a road construction machine
WO2007125017A1 (de) * 2006-04-27 2007-11-08 Wirtgen Gmbh STRAßENBAUMASCHINE, NIVELLIEREINRICHTUNG SOWIE VERFAHREN ZUM REGELN DER FRÄSTIEFE ODER FRÄSNEIGUNG BEI EINER STRAßENBAUMASCHINE
AU2007245786B2 (en) * 2006-04-27 2011-03-10 Wirtgen Gmbh Road-making machine, levelling device and method of controlling the cutting depth or cutting inclination in a road-making machine
DE102006020293A1 (de) * 2006-04-27 2007-11-08 Wirtgen Gmbh Straßenbaumaschine, Nivelliereinrichtung sowie Verfahren zum Regeln der Frästiefe oder Fräsneigung bei einer Straßenbaumaschine
US8690474B2 (en) 2006-04-27 2014-04-08 Wirtgen Gmbh Road construction machine, leveling device, as well as method for controlling the milling depth or milling slope in a road construction machine
DE102006020293B4 (de) * 2006-04-27 2013-07-11 Wirtgen Gmbh Straßenbaumaschine, Nivelliereinrichtung sowie Verfahren zum Regeln der Frästiefe oder Fräsneigung bei einer Straßenbaumaschine
US7946788B2 (en) 2006-04-27 2011-05-24 Wirtgen Gmbh Road construction machine, leveling device, as well as method for controlling the milling depth or milling slope in a road construction machine
CN101310077B (zh) * 2006-04-27 2011-10-12 维特根有限公司 筑路机械，找平装置以及用于调节筑路机械中铣削深度或铣削倾斜度的方法
JP2009534566A (ja) * 2006-04-27 2009-09-24 ヴィルトゲン ゲゼルシャフト ミット ベシュレンクテル ハフツング 道路建設機械、レベリング装置、ならびに道路建設機械において切削深さまたは切削勾配を制御するための方法
US8308395B2 (en) 2006-04-27 2012-11-13 Wirtgen Gmbh Road construction machine, leveling device, as well as method for controlling the milling depth or milling slope in a road construction machine
EP1860241A3 (de) * 2006-05-22 2008-06-04 WIRTGEN GmbH Selbstfahrende Baumaschine, sowie Verfahren zum Bearbeiten von Bodenoberflächen
AU2007202213B2 (en) * 2006-05-22 2008-12-11 Wirtgen Gmbh Automotive construction machine, as well as method for working ground surfaces
JP2009545689A (ja) * 2006-12-22 2009-12-24 ヴィルトゲン ゲゼルシャフト ミット ベシュレンクテル ハフツング 道路切削機および道路切削機の機械フレームを地面に平行に位置付ける方法
US9879390B2 (en) 2006-12-22 2018-01-30 Wirtgen Gmbh Road milling machine and method for measuring the milling depth
US8246270B2 (en) 2006-12-22 2012-08-21 Wirtgen Gmbh Road milling machine and method for measuring the milling depth
WO2008077963A1 (de) 2006-12-22 2008-07-03 Wirtgen Gmbh Strassenfräsmaschine sowie verfahren zur herstellung der parallelität des maschinenrahmens zum boden
EP1936034A3 (de) * 2006-12-22 2011-03-30 Wirtgen GmbH Straßenbaumaschine sowie Verfahren zur Messung der Frästiefe
EP2650443A3 (de) * 2006-12-22 2016-08-03 Wirtgen GmbH Strassenfräsmaschine sowie Verfahren zur Herstellung der Parallelität des Maschinenrahmens zum Boden
US8807867B2 (en) 2006-12-22 2014-08-19 Wirtgen Gmbh Road milling machine and method for measuring the milling depth
US11655599B2 (en) 2006-12-22 2023-05-23 Wirtgen America, Inc. Road milling machine and method for measuring the milling depth
US9879391B2 (en) 2006-12-22 2018-01-30 Wirtgen Gmbh Road milling machine and method for measuring the milling depth
AU2007338000B2 (en) * 2006-12-22 2011-01-06 Wirtgen Gmbh Road milling machine, and method for positioning the machine frame parallel to the ground
US9523176B2 (en) 2006-12-22 2016-12-20 Wirtgen Gmbh Road milling machine and method for measuring the milling depth
US8424972B2 (en) 2006-12-22 2013-04-23 Wirtgen Gmbh Road milling machine and method for positioning the machine frame parallel to the ground
US12006642B2 (en) 2006-12-22 2024-06-11 Wirtgen America, Inc. Road milling machine and method for measuring the milling depth
CN101466899B (zh) * 2006-12-22 2011-04-06 维特根有限公司 道路铣刨机以及机架与地面平行定位的方法
US8973688B2 (en) 2011-12-20 2015-03-10 Caterpillar Paving Products Inc. Suspension system and control method for track-propelled machines
US8874325B2 (en) 2011-12-22 2014-10-28 Caterpillar Paving Products Inc. Automatic four leg leveling for cold planers
US8757729B2 (en) 2011-12-22 2014-06-24 Caterpillar Paving Proudcts Inc. Automatic rear leg control for cold planers
US9206566B2 (en) 2011-12-22 2015-12-08 Caterpillar Paving Products Inc. Automatic four leg leveling for cold planers
CN102776827A (zh) * 2012-08-09 2012-11-14 三一重工股份有限公司 一种铣刨机及其铣刨深度监控装置
US8998344B2 (en) 2012-10-19 2015-04-07 Wirtgen Gmbh Self-propelled building machine
US9670630B2 (en) 2012-10-19 2017-06-06 Wirtgen Gmbh Self-propelled building machine
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ITVI20000092A1 (it) 2001-11-11
ITVI20000092A0 (it) 2000-05-11
US20020047301A1 (en) 2002-04-25
IT1315336B1 (it) 2003-02-10
EP1154075A3 (de) 2002-07-03

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