EP1472413A1 - Road milling machine with optimized operation - Google Patents
Road milling machine with optimized operationInfo
- Publication number
- EP1472413A1 EP1472413A1 EP02781269A EP02781269A EP1472413A1 EP 1472413 A1 EP1472413 A1 EP 1472413A1 EP 02781269 A EP02781269 A EP 02781269A EP 02781269 A EP02781269 A EP 02781269A EP 1472413 A1 EP1472413 A1 EP 1472413A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recording unit
- milling machine
- road milling
- machine according
- signal recording
- 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.)
- Granted
Links
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
Definitions
- the invention relates to a construction machine, in particular for working floors or removing traffic areas with a milling drum which is equipped with a large number of chisels.
- Such construction machines are known for example as road milling machines. They have a milling drum, in particular with a variety of chisels
- Round shank chisels While the machine is in use, the milling drum rotates and the chisels come into engagement with the floor covering to be worked.
- the chisels are subject to constant wear and must be replaced after a certain period of operation.
- the tool life depends heavily on the milling conditions. It often happens that the machine operator either exchanges the chisels too early or too late. If they are changed too early, there are unnecessary tool costs. If the change is too late, the milling drum may be damaged.
- One (or possibly several) machine parts can be monitored by means of the signal recording unit.
- the operating state assumed by the machine part is used as a parameter or map.
- the determined characteristic value can be compared with a reference quantity or a reference quantity field.
- a machine operator can take the necessary corrective measures. For example, he can then change the tool.
- the reference variable or the reference variable field can be a constant stored in the evaluation unit or one of many constants selected from a database of the evaluation unit on the basis of boundary conditions.
- the reference variable / the reference variable field can advantageously also be variable over time.
- the reference variable / the reference variable field can be determined empirically in the machine state using unworn tools. It is also conceivable that the reference variable / the reference variable field is defined recursively, that is, it can be derived from the characteristic variable / the characteristic diagram of the operating state of the past.
- the operating state of the monitored machine component can be recorded either continuously or at predetermined measuring intervals.
- the measurement result is preferably evaluated in such a way that the signal picked up by the signal recording unit is fed to an evaluation circuit, that the evaluation circuit compares the recorded signal with a preset value and forms a difference signal from the picked up signal and the preset value.
- the largely automated error message can then be carried out in this way.
- the default value can be determined empirically by means of a detection circuit and that the default value can be read into the evaluation circuit by means of the detection circuit. For example, a machine operator can determine the default value in the milling process when the chisels are not worn.
- a conceivable variant of the invention is such that it has a machine chassis that is supported by a chassis, one or more drive motors being assigned to the chassis, and that the signal recording unit detects the power consumption of the drive motor.
- the knowledge is exploited that changing wear conditions on the milling drum also lead to a change in the performance parameters of the drive motors. For example, increased drive work may be required due to increased bit wear.
- the drive motors are designed as electric motors and the signal recording unit detects the current supplied or that the drive motors are designed as hydraulic motors and the signal recording unit detects the hydraulic pressure in the fluid circuit assigned to the drive motor.
- Machine chassis is supported at least in some areas by means of at least one adjusting device, that by means of the adjusting device the machine chassis is at least partially height-adjustable, for which purpose the adjusting device is assigned a fluid under pressure and that the signal recording unit detects the pressure in the fluid.
- the cutting forces occurring during the milling process are recorded indirectly.
- the cutting forces are low when the chisels are not worn and easy to cut.
- the vertical proportion of the cutting forces is directed against gravity and thus relieves the load on the adjusting device, which would otherwise have to bear the entire machine weight.
- the pressure in the fluid assigned to the adjusting device decreases in proportion to the vertical portion of the cutting forces.
- this value can also be obtained by force measurement, for example by means of a strain gauge, on at least one of the adjusting devices or another component.
- the signal recording unit detects the machine feed. This can then be compared with the current performance parameters of the road milling machine, in particular with the drive power required for the milling drum. If, for example, the machine feed rate drops while the drive power is constant, a conclusion can be drawn about an increased state of wear.
- a combined calculation of the following values can also be carried out: vertical direction of force (determined, for example, from the adjusting device), horizontal direction of force (determined, for example, from the drive data).
- a vector can then be formed by linear combination. Its change in length or direction can be used as an assessment criterion.
- the signal recording unit detects the vibration of the machine component.
- This arrangement is based on the knowledge that different wear conditions also have an influence on the vibration behavior of individual machine components.
- a uniform vibration can be determined as a result of the uniform rotational movement of the milling drum. In the unworn state, this vibration has fixed parameters (amplitude, period). For example, as a result of a tool breakage, the vibration suddenly experiences
- the parameters change gradually in their amplitude or in their amount.
- the irregularity or regularity of the signal is of minor importance or is not present.
- the vibration is detected by means of a displacement sensor, a speed or an acceleration sensor.
- the signal recording unit detects the drive torque at one or more points of a drive arrangement driving the milling drum, or that the signal recording unit determines the motor characteristic data.
- a preferred embodiment of the invention provides that the signal recording unit has a pulse generator assigned to the milling drum.
- a position detection of the milling drum can be carried out by means of the pulse generator. If the signal recorded by the signal recording unit is now processed with the information from the pulse generator, then a detailed conclusion can be drawn as to the position of a damaged area, for example a broken chisel.
- the object of the invention is also achieved in that a detection device optically detects the milling image generated by the milling drum at least in regions.
- the quality of the milling image can be checked with the optical recognition device, for example a camera. Faults due to chisel wear or chisel breakage can be seen on the milling pattern.
- the optical recognition device for example a camera.
- a signal recording unit designed in the manner specified above can also be used. This allows the error detection to be further detailed.
- the detection device has at least one distance meter that determines the milling depth.
- Fig. 1 The side view of a construction machine, namely one
- FIG. 2 is a schematic representation of a milling drum in front view
- Fig. 4 shows the milling drum. 2 in side view
- Fig. 5 shows the milling drum.
- Road milling machine recorded vibration pattern The side view of a road milling machine shows the basic structure and components of the machine.
- the basis of the machine is a machine frame 10, which is carried by two front chassis 1 1 and two rear chassis 1 2.
- the trolleys 1 1 and 1 2 can be set in motion by electric motors or hydraulic motors. These drives work synchronously. It is therefore sufficient to have only one undercarriage, e.g. B. 1 1, sensors S6 and S7 to detect the current or pressure and speed.
- This milling box 1 3 receives at least one milling drum with chisel holders and chisels.
- the milling drum is driven by a drive unit 16 which has a diesel engine, a sensor S8 detecting the transmitted torque and a sensor S1 0 detecting other operating data, such as engine speed, exhaust gas temperature, boost pressure and the like.
- a camera K is attached to the machine frame 10 between the milling box 1 3 and the rear undercarriage 1 2, with which the milling image is recorded and recorded.
- the image is transferred to a screen device, BS in the cab 14 of the machine and displayed.
- the driver sitting in the driver's seat 15 can see the milling image on the screen device BS arranged in the area of the dashboard 18 and can check its condition and draw conclusions about its quality.
- a continuous check can take place if the camera K and the display device BS are switched on during the entire operating time of the machine.
- the control can also be modified so that a
- the devices are switched on and the display is only based on an initiated query.
- Sensors S2 and S4 which detect the milling drum position, the milling pressure or the milling moment, are accommodated on the milling box 1 3.
- a sensor S5 attached to the machine frame 10 above the milling box 13 detects the vibrations of the
- Milling box 1 3 in the direction of travel, transverse to the direction of travel of the machine and perpendicular to the road.
- the machine frame 10 can be adjusted in relation to the trolleys 11 and 12 by means of a height adjustment device in order to change the depth of engagement of the milling drum in the roadway.
- the depth of engagement is recorded with sensor S1.
- the pressure of the height adjustment can be detected via sensors S9.
- the removed milled material is removed from the milling box 1 3 via a conveyor, this conveyor having an endless conveyor belt 1 7, which is hinged at one end to the machine frame 1 0 and, as sensors S1 1 and S1 2 show, is adjusted in height and can be pivoted sideways so that a takeover by a vehicle parked underneath can be ensured without fear of damage to the vehicle and / or the endless conveyor belt 17.
- the measured values detected by sensors S1 to S1 2 are also transmitted to the driver's cab 14 and displayed in the area of the dashboard 18. All sensors can be assigned individual display elements that can be activated continuously or upon request. However, it is also possible to assign only one central display device to all sensors, on which the queried measured value is displayed, the display also containing the predetermined, permissible range for the measured value. Regardless of the display, the measured values can be continuously recorded and compared with the specified measured value ranges. If the measured value is below or above the specified measured value range, a warning signal can be triggered automatically and the error situation can be displayed on the central display device.
- FIGS. 2 to 3b in order to clarify the optical monitoring of the milling pattern of a milling drum 30, it is initially shown in the unworn state (FIG. 2).
- FIGS. 2 to 3b in order to clarify the optical monitoring of the milling pattern of a milling drum 30, it is initially shown in the unworn state (FIG. 2).
- all the chisel holders 31 are equipped with round shank chisels 32.
- FIGS. 2 to 3b this results in FIGS.
- FIGS. 3a and 3b show the milling pattern B shown in FIGS. 3a and 3b results, in particular in the enlarged detailed representation according to FIG. 3 b can be clearly seen that an increase in material P remains in the road surface at the point which was not worked due to the loss of the chisel.
- FIGS. 4 and 5 again show the milling drums 30 already shown in FIGS. 2 and 3, this time in a side view. 4a and 5a illustrate the vibration pattern that was recorded by a corresponding sensor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14193195.6A EP2886719B1 (en) | 2002-01-30 | 2002-10-18 | Road milling machine |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10203732 | 2002-01-30 | ||
DE10203732A DE10203732A1 (en) | 2002-01-30 | 2002-01-30 | Construction machinery |
PCT/EP2002/011675 WO2003064770A1 (en) | 2002-01-30 | 2002-10-18 | Road milling machine with optimized operation |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14193195.6A Division-Into EP2886719B1 (en) | 2002-01-30 | 2002-10-18 | Road milling machine |
EP14193195.6A Division EP2886719B1 (en) | 2002-01-30 | 2002-10-18 | Road milling machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1472413A1 true EP1472413A1 (en) | 2004-11-03 |
EP1472413B1 EP1472413B1 (en) | 2015-01-14 |
Family
ID=27618246
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14193195.6A Expired - Lifetime EP2886719B1 (en) | 2002-01-30 | 2002-10-18 | Road milling machine |
EP02781269.2A Revoked EP1472413B1 (en) | 2002-01-30 | 2002-10-18 | Construction machine with optimized operation |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14193195.6A Expired - Lifetime EP2886719B1 (en) | 2002-01-30 | 2002-10-18 | Road milling machine |
Country Status (4)
Country | Link |
---|---|
US (2) | US7422391B2 (en) |
EP (2) | EP2886719B1 (en) |
DE (1) | DE10203732A1 (en) |
WO (1) | WO2003064770A1 (en) |
Cited By (3)
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CN104711921A (en) * | 2009-03-25 | 2015-06-17 | 维特根有限公司 | Material ejecting device, support, and ejector |
US10407850B2 (en) | 2009-03-25 | 2019-09-10 | Wirtgen Gmbh | Ejector unit for a road milling machine or the like |
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- 2002-10-18 WO PCT/EP2002/011675 patent/WO2003064770A1/en not_active Application Discontinuation
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104711921A (en) * | 2009-03-25 | 2015-06-17 | 维特根有限公司 | Material ejecting device, support, and ejector |
CN104711921B (en) * | 2009-03-25 | 2017-05-10 | 维特根有限公司 | Material ejecting device, support, and ejector |
US10407850B2 (en) | 2009-03-25 | 2019-09-10 | Wirtgen Gmbh | Ejector unit for a road milling machine or the like |
CN104153282A (en) * | 2014-08-22 | 2014-11-19 | 山推工程机械股份有限公司 | Pavement milling machine |
Also Published As
Publication number | Publication date |
---|---|
EP1472413B1 (en) | 2015-01-14 |
WO2003064770A1 (en) | 2003-08-07 |
EP2886719B1 (en) | 2021-02-24 |
US20090035064A1 (en) | 2009-02-05 |
DE10203732A1 (en) | 2003-08-21 |
US7905682B2 (en) | 2011-03-15 |
US7422391B2 (en) | 2008-09-09 |
EP2886719A1 (en) | 2015-06-24 |
US20050207841A1 (en) | 2005-09-22 |
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