Wear component of a milling machine, milling machine, and method for determining the wear on the wear component

Patent metadata

Field	Value
Publication number	US-11499899-B2
Application number	US-201916450437-A
Country	US
Kind code	B2
Filing date	Jun 24, 2019
Priority date	Jul 2, 2018
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

The invention relates to a wear component of a milling machine, to a milling machine equipped with such a wear component, and to a method for determining the wear on a wear component. The wear component has associated with it at least one contactlessly readable electronic component for determining the wear on the wear component. Provision is made according to the present invention that at least one sensor is connected to at least one contactlessly readable electronic component for the transfer of data; that the contactlessly readable electronic component is embodied to receive measured data of the sensor and furnish them for contactless reading; and that at least one measurement portion of the sensor is guided, along at least one wear direction to be monitored, into a wear region or along the wear region of the wear component. The invention makes possible a better milling result as a result of optimized maintenance.

First claim

What is claimed is:

1. A wear component of a milling machine, comprising:
a contactlessly readable electronic component;
at least one sensor connected to the contactlessly readable electronic component for the transfer of data;
wherein the contactlessly readable electronic component is configured to receive measured data of the at least one sensor and furnish said measured data for contactless reading, wherein said measured data corresponds to a current amount of wear of the wear component; and
a measurement portion of the at least one sensor is guided, along at least one wear direction to be monitored, into or along a wear region of the wear component.

2. The wear component of claim 1 , wherein abrasion of the measurement portion results in a continuous or discontinuous change in a measurement signal of the at least one sensor.

3. The wear component of claim 1 , wherein the sensor or a measurement circuit of the sensor is:
an integral constituent of the contactlessly readable electronic component; or
electrically connected to the contactlessly readable electronic component via a detachable plug connection; or
connected to the contactlessly readable electronic component via a fixed electrical connection; or
connected to the contactlessly readable electronic component via a radio connection.

4. The wear component of claim 1 , wherein the contactlessly readable electronic component comprises an RFID transponder.

5. The wear component of claim 4 , wherein the RFID transponder is a passive RFID transponder, an active RFID transponder, or a semi-active RFID transponder.

6. The wear component of claim 1 , wherein the sensor is supplied with energy by a battery of the contactlessly readable electronic component, or via energy of an electromagnetic field used to read out the contactlessly readable electronic component.

7. The wear component of claim 1 , wherein the measurement portion of the sensor comprises two or more electrical resistors, connected in parallel with one another and arranged with a spacing from one another along the wear direction that is to be monitored.

8. The wear component of claim 1 , wherein:
the measurement portion of the sensor comprises a resistance element; and
a resistance of the resistance element changes as a result of abrasion of the resistance element.

9. The wear component of claim 1 , wherein:
the measurement portion of the sensor comprises a capacitive sensing element or an inductive sensing element; and
a capacitance of the capacitive sensing element or an inductance of the inductive sensing element changes as a result of abrasion of the sensing element.

10. The wear component of claim 1 , wherein at least portions of the measurement portion of the sensor comprise at least a portion of the wear region of the wear component.

11. The wear component of claim 10 , wherein the measurement signal of the sensor comprises:
an electrical resistance of the wear component or of a portion of the wear component; or
a capacitance measured between an electrode and the wear component or a portion of the wear component; or
an inductance of a coil in whose magnetic field the wear component or a portion of the wear component is guided.

12. The wear component of claim 1 , wherein the wear component to be monitored comprises one or more of: a bit; a bit holder; a base carrier of a tool system; an ejector; and a wear runner of the milling machine.

13. The wear component of claim 1 , wherein the contactlessly readable electronic component is arranged outside the wear region of the wear component.

14. The wear component of claim 13 , wherein the contactlessly readable electrical component is arranged in a recess within the wear component which is protected from wear.

15. A milling machine comprising:
at least one wear component further comprising
a contactlessly readable electronic component,
at least one sensor connected to the contactlessly readable electronic component for the transfer of data,
wherein the contactlessly readable electronic component is configured to receive measured data of the sensor corresponding to a current amount of wear of the wear component, and
at least one measurement portion of the sensor is guided, along at least one wear direction to be monitored, into a wear region or along the wear region of the wear component;

wherein the milling machine has associated with it at least one reading device for contactlessly reading out at least the measured data of the sensor which are stored in the contactlessly readable electronic component.

16. The milling machine of claim 15 , wherein the sensor or the contactlessly readable electronic component or the reading device or a controller connected to the reading device is configured to determine, as a measure of the wear on the wear component, a wear length measured along the wear direction to be monitored between a wear limit of the wear component and a wearing surface of the wear component.

17. The milling machine of claim 16 , wherein the contactlessly readable electronic component or the reading device or the control unit is configured to determine the wear length as a function of the measured data of the at least one sensor.

18. The milling machine of claim 15 , wherein the reading device is an RFID reading device.

19. A method for determining the wear on a wear component of a milling machine, the wear component comprising a contactlessly readable electronic component, wherein data of the contactlessly readable electronic component is contactlessly readable by a reading device, the method comprising:
ascertaining and contactlessly reading out a wear length of the wear component along a wear direction to be monitored, the wear length comprising a distance between a wear limit of the wear component and a wearing surface of the wear component, or a magnitude correlating with the wear length; and
determining the wear on the wear component based on the read-out data.

20. The method of claim 19 , wherein a measurement portion of the sensor is also worn away as wear on the wear component proceeds, such that a measurement signal of the sensor changes;
wherein the wear length is determined from the measurement signal, or the measurement signal comprises the magnitude correlating with the wear length.

21. The method of claim 19 , wherein the sensor is supplied with energy via a primary battery or via a rechargeable battery or via an electromagnetic field used to read out the contactlessly readable component.

22. The method of claim 19 , further comprising displaying via a display unit one or more of:
the respective wear lengths of one or more wear components;
as a function of the respective wear lengths of one or more wear components, suitable machine parameters for operating the milling machine;
as a function of the respective wear lengths of one or more wear components, milling tasks executable using the milling machine without replacement of the one or more wear components, or the quality achievable upon execution of various milling tasks without replacement of the one or more wear components.

23. The method of claim 19 , wherein a mutual exchange of the wear components is displayed, depending on the ascertained wear length of identical wear components used at different positions on the milling machine.

24. The method of claim 19 , wherein:
the reading device is arranged on a tool configured for installation or deinstallation of a

Assignees

• Wirtgen Gmbh

Inventors

• Schwalbach Lothar
• Brück Matthias

Classifications

• E01C23/065

  Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving (in situ mixing of hydraulic cement concrete E01C19/025; apparatus for in-plant recycling E01C19/1004, E01C19/1036) · CPC title

• E01C23/088 Primary

  Rotary tools, e.g. milling drums {(for forming recesses to receive marking materials E01C23/0946)} · CPC title

• E21B12/02

  Wear indicators · CPC title

• E21B1/00 Primary

  Percussion drilling · CPC title

• G01N3/56 Primary

  Investigating resistance to wear or abrasion · CPC title