Device for cutting a workpiece along a cutting line

Patent metadata

Field	Value
Publication number	US-10413981-B2
Application number	US-201414767793-A
Country	US
Kind code	B2
Filing date	Feb 18, 2014
Priority date	Feb 20, 2013
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

A device for cutting a workpiece along a cutting line between a first end point and a second end point including a saw head, comprising an advancing mechanism with a guide carriage and with an advancing motor. The saw head is arranged on the guide carriage movable along an advancing direction, including a sensor system with a sensor element for monitoring the saw head, the advancing mechanism or the work process, including a control unit with a control element to control the saw head, the advancing mechanism and the sensor system as well as an evaluation element to evaluate a measured quantity detected by the sensor system, including an operating device to operate the saw head and the advancing mechanism, and including a display. On the basis of the measured quantity, the control unit calculates the momentary work result which is shown on the display.

First claim

What is claimed is:

1. A device for cutting a workpiece along a cutting line between a first end point and a second end point, comprising:
a saw head with a drive motor and a saw blade being attached to a saw arm and rotatable around a rotational axis by the drive motor, the saw arm being swivelable around a swivel axis;
an advancing mechanism with a guide carriage and an advancing motor, the saw head being arranged on the guide carriage and movable along a guide rail in an advancing direction by the advancing motor;
a sensor system with at least one sensor element for monitoring the saw head, the advancing mechanism or a work process, wherein the sensor system comprises a first sensor element configured as a swivel-angle sensor and measuring a momentary swivel angle of the saw arm, and a second sensor element configured as a position sensor and measuring a momentary position of the saw head;
a control unit with a control element to control the saw head, the advancing mechanism and the sensor system as well as an evaluation element to evaluate at least one measured quantity detected by the sensor system;
operating means to operate the saw head and the advancing mechanism; and
a display means;
wherein on the basis of the measured momentary swivel angle of the saw arm detected by the swivel-angle sensor and momentary position of the saw head detected by the position sensor, the control unit calculates a momentary work result of the work process, and the calculated momentary work result is shown on the display means.

2. The device according to claim 1 wherein the control unit has a memory storing the measured quantities detected by the sensor system as well as the momentary work result.

3. The device as recited in claim 2 wherein, on the basis of the measured quantities stored in the memory and on the basis of the momentary work results, the control unit calculates additional characteristic values for the work process and shows them on the display means.

4. The device as recited in claim 1 wherein a remote control unit includes an operator input and the display means is connected to the control unit via a communication connection.

5. The device as recited in claim 4 wherein the control unit includes a first control unit and a second control unit, the first control unit being arranged in the saw head, and the second control unit being arranged in the remote control unit.

6. The device as recited in claim 5 wherein the momentary work result is calculated in the first control unit.

7. The device as recited in claim 5 wherein the first control unit transmits the measured quantities detected by the sensor system to the second control unit, and the momentary work result is calculated in the second control unit.

Assignees

• Hilti Ag

Inventors

• Brugger Peter

Classifications

• B23D59/008

  comprising computers · CPC title

• B28D7/005

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

• B28D1/045

  Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut · CPC title

• B23Q17/22

  for indicating or measuring existing or desired position of tool or work {(B23Q16/005 takes precedence)} · CPC title

• G05B19/19

  characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path · CPC title