Intelligent surface detection and core drilling start

Patent metadata

Field	Value
Publication number	US-10583582-B2
Application number	US-201615569588-A
Country	US
Kind code	B2
Filing date	Apr 22, 2016
Priority date	Apr 28, 2015
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

A control method for a core drill and a feed device for driving the core drill along a machine holding device, including the method steps: moving the core drill in a first direction; detecting the surface position of a material based on reaching a threshold value for at least one feed device parameter as a first reference value; moving the core drill in a second direction; operating the core drill in a tapping mode; moving the core drill in the first direction; detecting the surface position of a material based on reaching a threshold value for at least one corresponding drilling parameter as a second reference value; activating a water supply; and activating a regulating and control unit for adapting at least one drilling parameter as a function of at least one parameter of the feed device. A feed device for driving a core drill along a machine holding device for the use of the method, a core drill for the use of the method, as well as a core drilling system including a core drill and a feed device for driving the core drill along a machine holding device for the use of the method.

First claim

The invention claimed is:

1. A control method for the use of a core drilling system including a core drill and a feed device for driving the core drill along a machine holding device, the method comprising:
moving the core drill in a first direction and positioning a drill bit of the core drill against a surface of the mineral material to be worked while the core drill is not rotating;
detecting a position of the surface of a mineral material to be worked based on reaching a predetermined threshold value for at least one corresponding, predetermined parameter of the feed device in the form of a first reference value;
after the moving the core drill in a first direction and detecting a position of the surface, moving the core drill in a second direction; and then operating the core drill in a predetermined tapping mode wherein the core drill is rotated with slow speed and high torque; and then moving the core drill in the first direction for a second time;
after the core drill moves in the first direction for the second time, detecting the position of the surface of the mineral material to be worked based on reaching a drilling parameter predetermined threshold value for at least one corresponding, predetermined drilling parameter in the form of a second reference value; activating a water supply; and activating a regulating and control unit for adapting the at least one predetermined drilling parameter as a function of the at least one predetermined parameter of the feed device.

2. The method as recited in claim 1 wherein the drilling parameter corresponds to a rotational speed value of a drive of the core drill, a torque value generated by the drive and transmitted to a drilling tool, or an amperage value of the drive.

3. The method as recited in claim 1 wherein the predetermined drilling parameter threshold value corresponds to a predetermined percentage of the corresponding drilling parameter.

4. The control method as recited in claim 1 wherein no torque is transmitted to the drill bit in the positioning step.

5. The control method as recited in claim 1 wherein the first reference value is determined based on a position of the feed device relative to a machine stand.

6. The control method as recited in claim 1 wherein the predetermined threshold value is reached when a position of the feed device relative to a machine stand does not achieve a further advance for a predetermined time period.

7. The control method as recited in claim 1 wherein the predetermined threshold value is a motor current for a feed drive of the feed device.

8. The control method as recited in claim 1 wherein the moving in the second direction occurs before the predetermined tapping mode, the predetermined tapping mode including drilling the mineral material.

9. A feed device for driving a core drill along a machine holding device for performing a control method comprising:
moving the core drill in a first direction and positioning a drill bit of the core drill against a surface of the mineral material to be worked while the core drill is not rotating;
detecting a position of the surface of a mineral material to be worked based on reaching a predetermined threshold value for at least one corresponding, predetermined parameter of the feed device in the form of a first reference value;
after the moving the core drill in a first direction and detecting a position of the surface, moving the core drill in a second direction; and then operating the core drill in a predetermined tapping mode wherein the core drill is rotated with slow speed and high torque; and then moving the core drill in the first direction for a second time;
after the core drill moves in the first direction for the second time, detecting the position of the surface of the mineral material to be worked based on reaching a drilling parameter predetermined threshold value for at least one corresponding, predetermined drilling parameter in the form of a second reference value; activating a water supply; and activating a regulating and control unit for adapting the at least one predetermined drilling parameter as a function of the at least one predetermined parameter of the feed device.

10. A core drill for performing a control method comprising:
moving the core drill in a first direction and positioning a drill bit of the core drill against a surface of the mineral material to be worked while the core drill is not rotating;
detecting a position of the surface of a mineral material to be worked based on reaching a predetermined threshold value for at least one corresponding, predetermined parameter of the feed device in the form of a first reference value;
after the moving the core drill in a first direction and detecting a position of the surface, moving the core drill in a second direction; and then operating the core drill in a predetermined tapping mode wherein the core drill is rotated with slow speed and high torque; and then moving the core drill in the first direction for a second time;
after the core drill moves in the first direction for the second time, detecting the position of the surface of the mineral material to be worked based on reaching a drilling parameter predetermined threshold value for at least one corresponding, predetermined drilling parameter in the form of a second reference value; activating a water supply; and activating a regulating and control unit for adapting the at least one predetermined drilling parameter as a function of the at least one predetermined parameter of the feed device.

11. A core drilling system comprising a core drill and a feed device for driving a core drill along a machine holding device for performing a control method comprising:
moving the core drill in a first direction and positioning a drill bit of the core drill against a surface of the mineral material to be worked while the core drill is not rotating;
detecting a position of the surface of a mineral material to be worked based on reaching a predetermined threshold value for at least one corresponding, predetermined parameter of the feed device in the form of a first reference value;
after the moving the core drill in a first direction and detecting a position of the surface, moving the core drill in a second direction; and then operating the core drill in a predetermined tapping mode wherein the core drill is rotated with slow speed and high torque; and then moving the core drill in the first direction for a second time;
after the core drill moves in the first direction for the second time, detecting the position of the surface of the mineral material to be worked based on reaching a drilling parameter predetermined threshold value for at least one corresponding, predetermined drilling parameter in the form of a second reference value; activating a water supply; and activating a regulating and control unit for adapting the at least one predetermined drilling parameter as a function of the at least one predetermined parameter of the feed device.

Assignees

• Hilti Ag

Inventors

• Drexl Tobias
• Hartig Andreas
• Schmalholz Thomas
• Link Bernhard
• Golubovic Goran

Classifications

• B28D7/005

  Devices for the automatic drive or the program control of the machines · CPC title

• B28D1/041 Primary

  with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles · CPC title

• B23B2226/75

  Stone, rock or concrete · CPC title

• B23B2270/54

  Methods of turning, boring or drilling not otherwise provided for · CPC title

• B23B49/00

  Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored (marking-out equipment B25H7/00; measuring devices, gauges G01B) · CPC title