Method for operating a core drilling machine, and core drilling machine and core drill bit for carrying out the method

Patent metadata

Field	Value
Publication number	US-11148211-B2
Application number	US-202016876645-A
Country	US
Kind code	B2
Filing date	May 18, 2020
Priority date	May 16, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A method for operating an electric core drilling machine, in particular a magnetic core drilling machine, comprising the steps: identification of a core drill bit detachably connected to the core drilling machine, by means of an information carrier associated with the core drill bit and an information receiver associated with the core drilling machine; detection of a load quantity of the core drill bit; determination of a wear value of the core drill bit on the basis of the value of the load quantity; issuance of an error value when the wear value exceeds a wear limit value; as well as issuance of a signal to indicate the necessity of replacing and/or repairing the core drill bit. In addition, the invention relates to a core drilling machine and a core drill bit for carrying out the method.

First claim

What is claimed is:

1. A method for operating an electric core drilling machine, the method comprising:
identifying a core drill bit detachably connected to the core drilling machine via an information carrier associated with the core drill bit and an information receiver associated with the core drilling machine;
detecting a load quantity of the core drill bit;
determining a wear value of the core drill bit based on a value of the load quantity;
providing an error value when the wear value exceeds a wear limit value; and
providing a signal to indicate the necessity of replacing and/or repairing the core drill bit.

2. The method according to claim 1 , wherein the identification of the core drill bit on the core drilling machine takes place via NFC, RFID, and/or Bluetooth.

3. The method according to claim 1 , wherein at least one operating parameter of the core drilling machine is matched to the core drill bit in use.

4. The method according to claim 3 , wherein an optimal feed is indicated and/or set as a function of the core drill bit in use.

5. The method according to claim 1 , wherein the wear value is determined through a comparison between the value of the detected load quantity and monitoring data that are stored in a memory.

6. The method according to claim 1 , wherein the load quantity includes: operating hours, cumulative power consumption, curve of current draw of the core drilling machine, a total advance of the core drilling machine, and/or a number of holes drilled.

7. The method according to claim 1 , wherein the signal is transmitted from the core drilling machine to a receiving device of a user via a transmitter.

8. A core drilling machine comprising:
an electric drive with which a tool holder is adapted to be rotationally driven, and in which holder a core drill bit is detachably mounted;
an information receiver for identification of the core drill bit;
a sensor for detection of a load quantity of the core drill bit;
an analysis unit for determining a wear value of the core drill bit based on a value of the load quantity; and
an output unit for output of an error value when a wear limit value is exceeded to indicate the necessity of replacing and/or repairing the core drill bit.

9. The core drilling machine according to claim 8 , wherein the sensor is designed to detect operating hours, a cumulative power consumption, a curve of current draw of the core drilling machine, a total advance of the core drilling machine, and/or a number of holes drilled.

10. The core drilling machine according to claim 8 , wherein the information receiver is arranged on a magnet of the core drilling machine, on a support bracket of the core drilling machine, or on a housing of the core drilling machine.

11. The core drilling machine according to claim 8 , wherein the core drill bit comprises a distal first end with a cutting edge and a proximal second end with a shank for connecting the core drill bit to the core drilling machine, wherein an information carrier identifying the core drill bit is associated with the shank.

12. The core drilling machine according to claim 11 , wherein the information carrier is designed as an annular, passive transmitter that is accommodated in a recess formed at a proximal end of the shank.

13. The core drilling machine according to claim 12 , wherein the recess is implemented as an annular groove.

14. The core drilling machine according to claim 8 , wherein the sensor is designed to detect operating hours, a cumulative power consumption, a total advance of the core drilling machine, and/or a number of holes drilled.

Assignees

• Fein C & E Gmbh

Inventors

• Wachholz Karsten
• Kreb Christian
• Seemann Jackob

Classifications

• B25H1/0071 Primary

  by magnetic means · CPC title

• B23B51/04

  {Drills} for trepanning · CPC title

• B23Q17/0957

  Detection of tool breakage (detecting failure of drills B23B49/001) · CPC title

• B25F5/00

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• Y10T408/21

  with signal, indicator, illuminator or optical means · CPC title