EP2993010A1 - Verfahren zur Steuerung eines Wandsägesystems beim Erstellen eines Trennschnittes - Google Patents

Verfahren zur Steuerung eines Wandsägesystems beim Erstellen eines Trennschnittes Download PDF

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Publication number
EP2993010A1
EP2993010A1 EP14003099.0A EP14003099A EP2993010A1 EP 2993010 A1 EP2993010 A1 EP 2993010A1 EP 14003099 A EP14003099 A EP 14003099A EP 2993010 A1 EP2993010 A1 EP 2993010A1
Authority
EP
European Patent Office
Prior art keywords
saw
mounting
sin
saw blade
blade
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.)
Withdrawn
Application number
EP14003099.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Wilfried Kaneider
Dragan Stevic
Christian Bereuter
Peter Hricko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to EP14003099.0A priority Critical patent/EP2993010A1/de
Priority to US15/509,425 priority patent/US10821630B2/en
Priority to EP15757272.8A priority patent/EP3191279B1/de
Priority to PCT/EP2015/070008 priority patent/WO2016037911A1/de
Priority to JP2017513084A priority patent/JP6479168B2/ja
Publication of EP2993010A1 publication Critical patent/EP2993010A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/042—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs the saw blade being carried by a pivoted lever
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/044—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs the saw blade being movable on slide ways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/045—Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut
    • 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
    • B28D7/005—Devices for the automatic drive or the program control of the machines

Definitions

  • the present invention relates to a method for controlling a wall sawing system when creating a separating cut according to the preamble of claim 1.
  • the wall saw system comprises a guide rail and a wall saw with a saw head, a motor feed unit which moves the saw head parallel to a feed direction along the guide rail and at least one saw blade mounted on a saw arm of the saw head and driven by a drive motor about an axis of rotation.
  • the saw arm is designed to be pivotable about a pivot axis by means of a swivel motor. By a pivoting movement of the saw arm about the pivot axis, the penetration depth of the saw blade is changed in the workpiece.
  • the motorized feed unit comprises a guide carriage and a feed motor, wherein the saw head is mounted on the guide carriage and moved over the feed motor along the guide rail.
  • a sensor device with a swivel angle sensor and a displacement sensor is provided.
  • the swivel angle sensor measures the instantaneous swivel angle of the saw arm and the travel sensor measures the current position of the saw head on the guide rail.
  • the measured values for the current swivel angle of the saw arm and the current position of the saw head are regularly transmitted to a control unit of the wall saw.
  • the known method for controlling a wall sawing system is divided into a preparation part and a processing of the separating cut controlled by the control unit.
  • the preparation part the operator sets at least the saw blade diameter of the saw blade, the positions of the first and second end points in the feed direction and the final depth of the separating cut; other parameters can be the material of the machined Workpiece and the dimensions of embedded reinforcing iron.
  • the separating cut control unit determines a suitable main cutting sequence of main cuts, the main cutting sequence comprising at least a first main section having a first main cutting angle of the saw arm and a first diameter of the saw blade used, and a following second main section having a second main cutting angle of the saw arm and a first Diameter of the saw blade used.
  • the known method of controlling a wall sawing system does not disclose details of how to change the saw blade and blade guard during the controlled machining of a severing cut.
  • the object of the present invention is to develop a method for controlling a wall sawing system with a high processing quality, in which the change of a saw blade and a blade guard is integrated into the controlled processing of a separating cut.
  • the controlled processing of the separating cut is interrupted by the control unit and the wall saw is moved by the control unit in a parking position.
  • the wall saw is positioned by the control unit in a resumption position. If the control unit determines a resumption position in addition to the parking position, the operator can move the wall saw along the guide rail after the interruption by the operator from the parking position by means of the motorized feed unit.
  • the ability to move the wall saw from the parking position is advantageous for vertical or diagonal cuts in a wall in which the parking position is located above a manageable mounting position.
  • the control unit uses the displacement sensor to check the current position of the wall saw. If the current position deviates from the resume position, the wall saw will be positioned in the resume position.
  • a saw arm length defined as the distance between the swivel axis of the saw arm and the axis of rotation of the saw blade, and a distance between the swivel axis of the saw arm and an upper surface of the work piece are additionally defined .
  • the control unit For a controlled processing of a separating cut, the control unit must be aware of various parameters. These include the shegearmin, which represents a fixed device-specific size of the wall saw, and the vertical distance between the pivot axis and the surface of the workpiece, which also depends on the geometry of the wall saw and the geometry of the guide rail used.
  • the change takes place at a free end point without obstacle (first embodiment), the saw blade is changed at an obstacle without blades (second embodiment), the saw blade and the blade guard are changed at an obstacle to the second blade without blade guard (third embodiment) and the saw blade and blade guard are changed at an obstacle to a second blade and a second blade guard (fourth embodiment).
  • the second end point represents a free end point without obstruction
  • the pre-start second saw blade diameter of the second saw blade is used for the calculation of a first parking position and a resumption position corresponding to the first parking position.
  • the second saw blade diameter of the second saw blade is adjustable between a maximum second saw blade diameter and a minimum second saw blade diameter, wherein the maximum second saw blade diameter is used for the calculation of a second parking position.
  • the blade diameter changes due to wear during machining and decreases over time, the difference between the maximum and minimum second blade diameters corresponding to the height of the cutting segments.
  • the calculation of the second parking position with the maximum second saw blade diameter ensures that the second parking position is suitable for all actual saw blade diameters of the second saw blade.
  • the wall saw is positioned after the resumption of the controlled processing in a resumption position, which corresponds to the second parking position.
  • the resumption of controlled machining in the second parking position is possible for all actual saw blade diameters of the second saw blade; However, it has an inaccuracy in the positioning.
  • the actual second saw blade diameter of the second saw blade is entered and used for the calculation of a resumption position.
  • the input of the actual second saw blade diameter allows precise control of the wall saw.
  • the parking position is calculated so that each permitted saw blade diameter for the second saw blade can be mounted. By calculating the resumption position with the actual second saw blade diameter, the control of the wall saw can be done via the upper exit points of the saw blade.
  • the second end point is defined as an obstacle and before the start of the controlled machining an assembly distance is additionally determined, wherein the mounting distance for the calculation of a third to fifth parking position is additionally used.
  • the mounting distance ensures that there is sufficient clearance between the obstacle and the saw blade or between the obstacle and the blade guard for the operator to grip the saw blade or the blade guard.
  • the control unit calculates different parking positions.
  • the first and second saw blades are used without blade protectors.
  • the first blade is surrounded by the first blade guard and the processing with the second blade is done without blade protection.
  • the change is made from the first saw blade with the first blade guard to the second blade with the second blade guard.
  • the parking positions must meet the four boundary conditions (disassembly, mounting, swiveling and swiveling in) and depend on the first main cutting angle of the first main section and on the second main cutting angle of the second main section.
  • the processing is carried out with the first and second saw blade without blades.
  • three angular ranges -180 ° to 0 °, 0 ° to 90 ° and 90 ° to 180 ° are to be differentiated, so that there are a total of nine different distances for the third parking position.
  • first main intersection angle of displacement is ⁇ * sin (- ⁇ 1) negative and therefore basically applies D 1/2 + ⁇ ⁇ sin (- ⁇ 1) ⁇ D 1/2 + ⁇ assembly. If the second diameter D2 is greater than the first diameter D 1, D always applies 1/2 + ⁇ assembly ⁇ D 2/2 + ⁇ assembly.
  • the preset first saw blade diameter of the first saw blade and for the second diameter of the second main section of the preset second saw blade diameter of the second saw blade is used.
  • the wall saw is positioned by the control unit in a resumption position corresponding to the third parking position.
  • the second saw blade diameter is adjustable between a maximum second saw blade diameter and a minimum second saw blade diameter, and the maximum second saw blade diameter is used to calculate the parking position for the second diameter of the second main cut. By calculating the parking position with the maximum second saw blade diameter, it is ensured that the parking position is suitable for all actual saw blade diameters of the second saw blade.
  • the wall saw is either positioned in a resumption position that corresponds to the parking position, or before the resumption of controlled machining, the actual second saw blade diameter of the second saw blade is entered and used for the calculation of a resumption position.
  • the pivot axis points in the resume position a distance to the second end point of D real .2 / 2 for -180 ° ⁇ - ⁇ 2 ⁇ 0 °, D real .2 / 2 + ⁇ ⁇ sin ( ⁇ 2 ) for 0 ° ⁇ 2 ⁇ 90 ° and D real .2 / 2 + ⁇ ⁇ sin (90 °) for 90 ° ⁇ 2 ⁇ 180 °.
  • a first blade guard having a first blade guard width is defined, wherein the first blade guard width is composed of a first distance of the pivot axis to the first blade guard edge and a second distance of the pivot axis to the second blade guard edge is and the second distance is additionally used for the calculation of the fourth parking position.
  • the fourth parking position depends on the first and second main cutting angles. For the main cutting angles three angular ranges of -180 ° to 0 °, 0 ° to 90 ° and 90 ° to 180 ° are to be differentiated, so that there are a total of nine different distances for the fourth parking position.
  • the saw arm is disposed at a negative first main cutting angle between -180 ° and 0, and the pivot axis is at a distance from the second end point of maximum value of [B b .1 + ⁇ mounting , D 2/2 + ⁇ assembly] is -180 ° ⁇ - ⁇ 2 ⁇ 0 °, maximum value of [B + ⁇ b .1 mounting, D 2/2 + ⁇ mounting, D 2/2 + ⁇ ⁇ sin ( ⁇ 2) ] for 0 ° ⁇ 2 ⁇ 90 ° and maximum value of [B b .1 + ⁇ mounting, D 2/2 + ⁇ mounting, D 2/2 + ⁇ ⁇ sin (90 °)] for 90 ° ⁇ 2 ⁇ 180 ° up.
  • the saw arm is disposed at a positive first main intersecting angle between 90 ° and 180 ° before the interruption of the controlled machining, and the swivel axis is at a distance from the second maximum maximum value of [B b .1 + ⁇ mounting , D 2/2 + ⁇ mounting, B b .1 + ⁇ ⁇ sin (90 °)] is -180 ° ⁇ - ⁇ 2 ⁇ 0 °, maximum value of [B + ⁇ b .1 mounting, D 2/2 + ⁇ assembly , B b .1 + ⁇ ⁇ sin (90 °), D 2/2 + ⁇ ⁇ sin ( ⁇ 2)] ⁇ for 0 ° ⁇ 2 ⁇ 90 ° and maximum value of [B + ⁇ b .1 mounting, D 2 / 2 + ⁇ mounting , B b .1 + ⁇ ⁇ sin (90 °), D 2/2 + ⁇ ⁇ sin (90 °)] for 90 ° ⁇ 2
  • the wall saw After resuming the controlled machining, the wall saw is positioned in a resumption position corresponding to the fourth parking position.
  • the saw arm is pivoted in the resume position in the second main cutting angle and the saw head is then moved in a direction opposite to the positive feed direction, negative feed direction in the direction of the first end point.
  • a second blade guard having a second blade guard width is defined, the second blade guard width composed of a first distance of the pivot axis to the first blade guard edge and a second distance of the pivot axis to the second blade guard edge is and the second distance for the calculation of the fifth parking position is additionally used.
  • the fifth parking position depends on the first and second main cutting angles. In this case, three angular ranges are to be distinguished, negative main cutting angle, positive main cutting angle from 0 ° to 90 ° and positive main cutting angle of 90 ° to 180 °, so that there are a total of nine different distances for the fifth parking position.
  • the pivot axis has in the fifth parking position a distance to the second end point of maximum value of [B b .1 + ⁇ assembly , B b .2 + ⁇ mounting ] for -180 ° ⁇ - ⁇ 2 ⁇ 0 °, maximum value of [B b .1 + ⁇ mounting , B b .2 + ⁇ mounting , B b .2 + ⁇ ⁇ sin ( ⁇ 2 ) for 0 ° ⁇ 2 ⁇ 90 ° and maximum value of [B b .1 + ⁇ mounting , B b .2 + ⁇ mounting , B b .2 + ⁇ ⁇ sin (90 °)] for 90 ° ⁇ 2 ⁇ 180 °.
  • the saw arm is disposed at a positive first principal intersecting angle between 0 ° and 90 ° before the interruption of the controlled machining and the pivot axis is at a distance from the second maximum maximum value of [B b .1 + ⁇ mounting , B b .2 + ⁇ mounting , B b .1 + ⁇ ⁇ sin ( ⁇ 1 )] for -180 ° ⁇ - ⁇ 2 ⁇ 0 °, maximum value of [B b .1 ⁇ mounting , B b .2 + ⁇ mounting , B .1 b + ⁇ ⁇ sin ( ⁇ 1), B b .2 + ⁇ ⁇ sin ( ⁇ 2)] for 0 ° ⁇ 2 ⁇ 90 ° and maximum value of [B + ⁇ b .1 mounting, B b. 2 + ⁇ mounting , B b .1 + ⁇ ⁇ sin ( ⁇ 1 ), B b .2 + ⁇ ⁇ sin (90 °)] for
  • the saw arm is disposed at a positive first main intersecting angle between 90 ° and 180 ° before the interruption of the controlled machining, and the pivot axis is at a distance from the second maximum maximum value of [B b .1 + ⁇ mounting , B b .2 + ⁇ mounting , B b .1 + ⁇ ⁇ sin (90 °)] for -180 ° ⁇ - ⁇ 2 ⁇ 0 °, maximum value of [B b .1 + ⁇ mounting , B b .2 + ⁇ mounting , B b .1 + ⁇ ⁇ sin (90 °), B b .2 + ⁇ ⁇ sin ( ⁇ 2 )] for 0 ° ⁇ 2 ⁇ 90 ° and maximum value of [B b .1 + ⁇ assembly , B b .2 + ⁇ mounting, B b .1 + ⁇ ⁇ sin (90 °), B b .2 + ⁇ ⁇ sin (90 °), B b
  • the wall saw After resuming the controlled machining, the wall saw is positioned in a resumption position corresponding to the fifth parking position.
  • the saw arm is pivoted in the resume position in the second main cutting angle and the saw head is then moved in a direction opposite to the positive feed direction, negative feed direction in the direction of the first end point.
  • FIG. 1 shows a wall saw 10 with a guide rail 11, one arranged displaceably on the guide rail 11, the tool unit 12 and a remote control 13.
  • the power tool is designed as a wall saw 12 and comprises a processing unit 14 and a motor drive unit 15.
  • the processing unit is configured as a saw head 14 and includes a saw blade designed as a machining tool 16, which is attached to a saw arm 17 and is driven by a drive motor 18 about a rotational axis 19th
  • the saw blade 16 is surrounded by a blade guard 21 which is secured by means of a blade protection holder on the saw arm 17.
  • the saw arm 17 is formed by a pivot motor 22 about a pivot axis 23 pivotally.
  • the swivel angle ⁇ of the saw arm 17 determines, with a saw blade diameter D of the saw blade 16, how deep the saw blade 16 dips into a workpiece 24 to be machined.
  • the drive motor 18 and the pivot motor 22 are arranged in a device housing 25 .
  • the motor-driven feed unit 15 comprises a guide carriage 26 and a feed motor 27, which is likewise arranged in the device housing 25 in the exemplary embodiment.
  • the saw head 14 is mounted on the guide carriage 26 and formed on the feed motor 27 along the guide rail 11 in a feed direction 28 slidably.
  • a control unit 29 for controlling the saw head 14 and the motor feed unit 15 is arranged in addition to the motors 19, 22, 27.
  • a sensor device For monitoring the wall sawing system 10 and the machining process, a sensor device is provided with a plurality of sensor elements.
  • a first sensor element 32 is designed as a swivel angle sensor and a second sensor element 33 as a displacement sensor.
  • the swivel angle sensor 32 measures the current swivel angle of the saw arm 17 and the displacement sensor 33 measures the current position of the saw head 14 on the guide rail 11.
  • the measured variables are transmitted from the swivel angle sensor 32 and displacement sensor 33 to the control unit 29 and used to control the wall saw 12.
  • the remote control 13 comprises a device housing 35, an input device 36, a display device 37 and a control unit 38, which is arranged in the interior of the device housing 35.
  • the control unit 38 converts the inputs of the input device 36 into control commands and data, which are transmitted to the wall saw 12 via a first communication link.
  • the first communication connection is designed as a wireless and wireless communication connection 41 or as a communication cable 42 .
  • the wireless and wireless communication connection is formed in the embodiment as a radio link 41, which is formed between a first radio unit 43 on the remote control 13 and a second radio unit 44 on the power tool 12.
  • the wireless and wireless Communication link 41 may be configured in the form of an infrared, Bluetooth, Wi-Fi or Wi-Fi connection.
  • FIGS. 2A B show the guide rail 11 and the wall saw 12 of the wall sawing system 10 of FIG. 1 when creating a separating cut 51 in the workpiece 24 of the workpiece thickness d.
  • the separating cut 51 has an end depth T and extends in the feed direction 28 between a first end point E 1 and a second end point E 2 .
  • a direction parallel to the feed direction 28 is defined, with the positive X direction directed from the first end point E 1 to the second end point E 2
  • the Y direction is a direction perpendicular to the X direction in the depth of the workpiece 24 defined.
  • the end point of a separation cut can be defined as a free end point without hindrance or as an obstacle. Both endpoints can be defined as free endpoints without obstacles, both endpoints as obstacles or one endpoint as a free endpoint and the other endpoint as an obstacle. At a free endpoint without obstacle, an overlap may be allowed. Due to the overlapping, the cutting depth at the end point reaches the final depth T of the separating cut. In the embodiment of FIGS. 2A , B form the end points E 1 , E 2 free end points without obstruction, wherein at the free first end point E 1, an overlapping is not allowed and at the second end point E 2, an overlap is done.
  • FIG. 2A shows the saw head 14 in a mounting position X 0 and the saw arm 17 in a basic position of 0 °.
  • the saw head 14 is positioned by the operator by means of the guide carriage 26 in the mounting position X 0 on the guide rail 11.
  • the mounting position X 0 of the saw head 14 is between the first and second end point E 1 , E 2 and is determined by the position of the pivot axis 23 in the feed direction 28.
  • the position of the pivot axis 23 is particularly suitable as a reference position X Ref for the position monitoring of the saw head 14 and the control of the wall saw 12, since the X position of the pivot axis 23 remains unchanged even during the pivoting movement of the saw arm 17.
  • another X position on the saw head 14 can be set as the reference position, in which case the distance in the X direction to the pivot axis 23 must additionally be known.
  • the X positions of the first and second end points E 1 , E 2 are defined in the exemplary embodiment by the input of partial lengths.
  • the distance between the mounting position X 0 and the first end point E 1 determines a first part length L 1 and the distance between the mounting position X 0 and the second end point E 2 a second part length L 2 .
  • the X positions of the end points E 1 , E 2 can be defined by entering a partial length (L 1 or L 2 ) and a total length L as the distance between the end points E 1 , E 2 .
  • the separating cut 51 is created in several partial sections until the desired final depth T is reached.
  • the partial sections between the first and second end points E 1 , E 2 are defined as main sections and the cutting sequence of the main sections as the main section sequence.
  • additional corner processing can be carried out, which in the case of an obstacle is referred to as obstacle processing and in the case of a free end point with overlapping as overcut processing.
  • the main cutting sequence can be specified by the operator or the control unit of the wall sawing system determines the main cutting sequence depending on several boundary conditions.
  • the first main section which is also referred to as a precut, is executed with a reduced depth of cut and a reduced power of the drive motor in order to prevent polishing of the saw blade.
  • the other major sections are usually performed with the same depth of cut, but may also have different depths of cut.
  • the boundary conditions usually defined by an operator include the depth of cut of the precut, the power of the precut, and the maximum depth of cut of the other major sections. From these constraints, the control unit can determine the main cutting sequence.
  • the main sections of a separating cut are made with a saw blade diameter or with two or more saw blade diameters. If multiple saw blades are used, machining usually begins with the smallest saw blade diameter.
  • the saw blade 16 In order to mount the saw blade 16 on the saw arm 17, the saw blade 16 must be arranged in the basic position of the saw arm 17 above the workpiece 24. Whether this boundary condition is satisfied depends on two device-specific sizes of the wall sawing system 10, on the one hand by a vertical distance ⁇ between the pivot axis 23 of the saw arm 17 and a top 53 of the workpiece 24 and on the other by a saw arm length ⁇ of the saw arm 17, which Distance between the axis of rotation 19 of the saw blade 16 and the pivot axis 23 of the saw arm 17 is defined.
  • the saw blade 16 is arranged in the basic position above the workpiece 24.
  • the saw arm length 8 is a fixed device-specific size of the wall saw 12, whereas the vertical distance ⁇ between the pivot axis 23 and the surface 53 in addition to the geometry of the wall saw 12 also depends on the geometry of the guide rail 11 used.
  • the saw blade 16 is mounted on a flange on the saw arm 17 and is driven by the drive motor 18 about the axis of rotation 19 in the sawing operation.
  • the pivot angle is 0 ° and the axis of rotation 19th
  • the saw blade 16 is moved in the depth direction 52 above the pivot axis 23.
  • the saw blade 16 is moved by a pivoting movement of the saw arm 17 about the pivot axis 23 from the basic position at 0 ° in the workpiece 24.
  • the saw blade 16 is driven by the drive motor 18 about the axis of rotation 19.
  • the saw blade 16 should be surrounded by the blade guard 21 during operation.
  • the wall saw 12 is operated with blade guard 21 or without blade guard 21.
  • a disassembly of the blade guard 21 may be provided, for example. If different saw blade diameters are used to machine the cut, various blade protectors with appropriate blade guard widths are usually used.
  • FIG. 2 B shows the saw arm 17, which is inclined in a negative rotational direction 54 at a negative pivot angle - ⁇ .
  • the saw arm 17 is adjustable in the negative direction of rotation 54 between pivot angles of 0 ° to -180 ° and adjustable in a direction opposite to the negative direction of rotation 54, positive direction of rotation 55 between pivot angles of 0 ° to + 180 °.
  • arrangement of the saw arm 17 is referred to as a pulling arrangement when the saw head 14 is moved in a positive feed direction 56 . If the saw head 14 is moved in a direction opposite to the positive feed direction 56, negative feed direction 57 , the arrangement of the saw arm 17 is referred to as an abutting arrangement.
  • the maximum penetration depth of the saw blade 16 into the workpiece 24 is achieved. Due to the pivotal movement of the saw arm 17 about the pivot axis 23, the position of the rotation axis 19 in the X direction and in the Y direction is shifted. The displacement of the axis of rotation 19 is dependent on the saw arm length ⁇ ⁇ and the swivel angle ⁇ of the saw arm 17.
  • the displacement ⁇ x in the X direction is ⁇ sin ( ⁇ ⁇ ) and the displacement ⁇ ⁇ in the Y direction is ⁇ ⁇ cos ( ⁇ ⁇ ).
  • the saw blade 16 generates in the workpiece 24 a cutting wedge in the form of a circle segment with a height h and a width b.
  • the height h of the circular segment corresponds to the penetration depth of the saw blade 16 into the workpiece 24.
  • D the saw blade diameter
  • h the penetration depth of the saw blade 16
  • ⁇ denotes the perpendicular distance between the pivot axis 23 and the upper side 53 of the workpiece 24, ⁇ the saw arm length and ⁇ the first pivot angle
  • the control of the wall saw 12 during the separating cut depends on whether the end points are defined as obstacles, and on an obstacle whether the processing is performed with blade guard 21 or without blade guard 21.
  • the control of the wall saw 12 in the process according to the invention via upper exit points of the saw blade 16 at the top 53 of the workpiece 24.
  • the upper exit points of the saw blade 16 can be from the reference position X Ref the pivot axis 23 in the X direction, calculate the displacement ⁇ x of the rotation axis 19 in the X direction and the width b.
  • An upper exit point facing the first end point E 1 is referred to as a first upper exit point 58 and an upper exit point facing the second end point E 2 as a second upper exit point 59.
  • X (58) X Ref + ⁇ x - b / 2
  • X (59) X Ref + ⁇ x + b / 2
  • FIGS. 3A B show the wall sawing system 10 when creating a separating cut between the first end point E 1 and the second end point E 2 , which are defined as obstacles, the machining being done without blade guard 21.
  • a first saw blade edge 61 which faces the first end point E 1
  • a second saw blade edge 62 which faces the second end point E 2 , form the boundary of the wall saw 12.
  • the X positions of the first and second saw blade edges 61, 62 in the X direction can be calculated from the reference position X Ref of the pivot axis 23, the displacement path ⁇ x of the rotation axis 19 and the saw blade diameter D.
  • FIG. 3A shows the wall saw 12 with the, in the negative rotational direction 54 at a negative swivel angle - ⁇ (0 ° to -180 °) inclined saw arm 17.
  • X (61) X Ref + ⁇ ⁇ sin (- ⁇ ) - D / 2
  • X (62) X Ref + ⁇ ⁇ sin (- ⁇ ) + D / 2.
  • 3B shows the wall saw 12 with the, in the positive direction of rotation 55 at a positive pivoting angle ⁇ (0 ° to + 180 °), inclined saw arm 17.
  • X (61) X Ref + ⁇ ⁇ sin ( ⁇ ) - D / 2
  • X (62) X Ref + ⁇ ⁇ sin ( ⁇ ) + D / 2.
  • FIGS. 4A B show the wall sawing system 10 when creating a separation cut between the first end point E 1 and the second end point E 2 , which are defined as obstacles, wherein the processing is performed with blade guard 21.
  • first blade protection edge 71 which faces the first end point E 1
  • second blade protection edge 72 which faces the second end point E 2 , the boundary of the wall saw 12th
  • the X positions of the first and second blade protection edges 71, 72 in the X direction can be calculated from the reference position X Ref of the pivot axis 23, the displacement path ⁇ x of the rotation axis 19 and the blade guard width B.
  • FIG. 4A shows the wall saw 12 with the, under a negative pivot angle - ⁇ (0 ° to -180 °), inclined saw arm 17 and the mounted blade guard 21 of the blade guard width B.
  • the distances of the rotation axis 19th determined to the blade guard edges 71, 72, wherein the distance to the first blade protection edge 71 as a first distance B a and the distance to the second blade protection edge 72 as a second distance B b are designated.
  • FIG. 4B shows the wall saw 12 with the, under a positive pivot angle ⁇ (0 ° to + 180 °), inclined saw arm 17 and the mounted blade guard 21 of the blade guard width B.
  • X (71) X Ref + ⁇ ⁇ sin ( ⁇ ) -Ba
  • X (72) X Ref + ⁇ ⁇ sin ( ⁇ ) + B b .
  • FIGS. 2A , B show a separation section between two end points E 1 , E 2 , which are defined as free end points without obstacle
  • FIGS. 3A , B and 4A, B show a separation cut between two end points E 1 , E 2 , which are defined as obstacles.
  • one endpoint is defined as an obstacle and the other endpoint represents a free endpoint without hindrance, the control of the wall saw at the free end point on the upper exit point of the saw blade and obstacle on the saw blade edge (processing without blade guard 21) or the blade guard edge (processing with blade guard 21).
  • the first upper exit point 58, the first saw blade edge 61 and the first blade guard edge 71 are grouped together under the term "first boundary" of the wall saw 12 and the second upper exit point 59, the second saw blade edge 62 and the second blade guard edge 72 are termed "second Limitation ".
  • FIGS. 5A-H show the wall saw system 10 of FIG. 1 with the guide rail 11 and the wall saw 12 when creating a separating cut of the final depth T in the workpiece 24 between a first end point E 1 , which represents an obstacle, and a second end point E 2 , which represents a free end point without hindrance.
  • the processing of the separating cut is carried out with the aid of the method according to the invention for controlling a wall sawing system.
  • the separating cut is made in a main cutting sequence of several main cuts until the desired final depth T is reached.
  • the main cutting sequence comprises a preliminary cut (zeroth main section) with a zeroth main cutting angle ⁇ 0 of the saw arm 17, a zeroth diameter D 0 and a zeroth penetration depth h 0 of the saw blade used, a first main section with a first main cutting angle ⁇ 1 of the saw arm 17, a first diameter D 1 and a first penetration depth h 1 of the saw blade used, a second main section with a second main cutting angle ⁇ 2 of the saw arm 17, a second diameter D 2 and a second penetration depth h 2 of the saw blade used and a third main section with a third main section angle ⁇ 3 of Saw arms 17, a third diameter D 3 and a third penetration depth h 3 of the saw blade used.
  • the precut and the first main section are performed by a first saw blade 16.1 with a first saw blade diameter D.1 and a first blade guard 21.1 with a first blade guard width B.1 .
  • the zeroth diameter D 0 of the pre-cut and the first diameter D 1 of the first main section coincide with the first saw blade diameter D.1, likewise the zeroth width B 0 of the pre-cut and the first width B 1 of the first main section coincide with the first blade guard width B. 1 match.
  • the second main section and the third main section are performed by a second saw blade 16.2 with a second saw blade diameter D.2 and a second blade guard 21.2 with a second blade guard width B.2 .
  • the second diameter D 2 of the second main section and the third diameter D 3 of the third main section coincide with the second saw blade diameter D.2, as are the second width B 2 of the second main section and the third width B 3 of the third main section with the second blade guard width B.2 match.
  • the main sections of a separating cut are advantageously carried out either with a pulling saw arm 17 arranged or the saw arm 17 is arranged alternately pulling and pushing.
  • the pulling arrangement of the saw arm 17 allows a stable guidance of the saw blade during machining and a narrow kerf.
  • a separating cut, in which the saw arm 17 is alternately pulled and pushed, has the advantage that the auxiliary times necessary for positioning the saw head 14 and pivoting the saw arm 17 are reduced.
  • the processing takes place in all main sections with the pulling arm 17 arranged in a pulling manner.
  • the processing of the separating cut begins at the second end point E 2 .
  • the saw arm 17 is pivoted from the basic position 0 ° in the positive direction of rotation 55 into the positive zero main cutting angle ⁇ 0 . Subsequently, the saw head 14 is moved with the inclined saw arm 17 and the rotating first saw blade 16.1 in the negative feed direction 57.
  • the control of the wall saw 12 takes place at the first end point E 1 via the first blade protection edge 71.1 of the first blade guard 21.1.
  • the saw head 14 is stopped, if the pivot axis B at a distance of 1/2 23 - has ⁇ ⁇ sin (- ⁇ 1) to the first end point e. 1
  • the first width B 1 of the blade guard used corresponds to the first blade guard width B.1 of the first blade guard 21.1.
  • the saw arm 17 is pivoted in the negative rotational direction 54 into the negative first main cutting angle - ⁇ 1 and the saw head 14 is moved in the positive feed direction 56 with the saw arm 17 inclined at - ⁇ 1 ( FIG. 5A ).
  • the transition from the precut to the first partial section without removing the residual material is done.
  • the precut can be terminated with a complete removal of the residual material during the precut or a partial removal.
  • the saw head 14 is positioned in a parking position and the saw arm 17 is pivoted out of the workpiece 24, wherein the saw arm 17 is pivoted in the embodiment in the basic position of 0 ° ( FIG. 5B ).
  • the positioning of the saw head 14 in the parking position and the pivoting movement of the saw arm 17 can be carried out sequentially or performed simultaneously.
  • the parking position is intended to fulfill various boundary conditions:
  • the first saw blade 16.1 and the first blade guard 21.1 can be disassembled in the parking position.
  • the second saw blade 16.2 and the second blade guard 21.2 can be mounted in the park position.
  • the path for positioning the saw head 14 for the second main section should be as low as possible; Ideally, the parking position corresponds to the starting position for the second main section.
  • the wall saw 12 is positioned by the control unit 29 in a resumption position corresponding to the parking position.
  • the distance was set in the calculation of the parking position so that the, the second end point E 2 facing, the second upper exit point 59.2 of the second saw blade 16.2 after the pivotal movement of the saw arm 17 in the positive second main section angle ⁇ 2 coincides with the second end point E 2 ( FIG. 5C ). This positioning can reduce non-productive time.
  • the last major section In practice, it is customary to perform the last major section with the maximum pivoting angle of the saw arm when cutting a workpiece in order to remove as much material as possible in the area of the end points.
  • the maximum allowable Depth of cut corresponds to the maximum swing angle ⁇ 180 ° and with restriction the permissible maximum cutting depth for the saw blade used can be converted into a maximum swing angle.
  • the third main section corresponds to the last main section and is performed with a third main section angle of -180 °.
  • the positioning of the saw head 14 for the third main section with the maximum pivot angle of -180 ° takes place by means of the critical angle ⁇ crit of -90 °.
  • the critical angle of -90 ° must be taken into account, since the first end point E 1 must not be exceeded during the pivoting movement.
  • the saw arm 17 is pivoted in the negative third main cutting angle of - 180 ° ( FIG. 5E ).
  • the saw head 14 is moved with the below -180 ° inclined saw arm 17 (FIG. 6F) in the negative direction of feed 57 until the first sheet protection edge 71.2 of the second blade guard 21.2 coincides with the first end point E 1.
  • the corner processing of the first end point E 1 can be improved if the second blade guard 21.2 is dismantled and the corner processing takes place without blade protection. Without blade guard, the saw head 14 is moved with the below -180 ° inclined saw arm 17 in the negative direction of feed 57, to the first blade edge of the second blade 61.2 16.2 coincides with the first end point e. 1
  • the third main section is performed with the, under the negative third main cutting angle - ⁇ 3 inclined, saw arm 17 in the positive feed direction 56.
  • an overcut is allowed is based on the third main cutting a corner processing of the second end point E 2 ( FIG. 5H ).
  • FIGS. 6A , B show the wall saw system 10 with the guide rail 11 and the wall saw 12 in creating another separation cut between a first end point E 1 , which represents a free end point without obstruction, and a second end point E 2 , which is an obstacle.
  • the control of the wall saw 12 takes place at the first end point E 1 via the first upper exit point 59 of the saw blade used and at the second end point E 2 over the first saw blade edge 61 (without blade guard 21) or the first blade guard edge 71 (with blade guard 21).
  • the cutting sequence comprises a first main section having a first main cutting angle ⁇ 1 , the saw arm 17, a first diameter D 1 and a first penetration depth h 1 of the saw blade used, and a following second main section having a second main cutting angle ⁇ 2 of the saw arm 17, a second diameter D 2 and a second penetration depth h 2 of the saw blade used.
  • the first main section is performed by the first saw blade 16.1 and the first blade guard 21.1 and the second main section is performed by the second blade 16.2 and the second blade guard 21.2.
  • the first diameter D 1 and the first width B 1 of the first main section coincide with the first saw blade diameter D.1 and the first blade guard width B.1.
  • the second diameter D 2 and the second width B 2 of the second main section coincide with the second saw blade diameter D.2 and the second blade guard width B.2.
  • the dismounting of the first saw blade 16.1 and first blade guard 21.1 and the mounting of the second saw blade 16.2 and second blade guard 21.2 take place in the basic position of the saw arm 17 at 0 °. If the second end point E 2 , as in the embodiment represents an obstacle, an assembly distance ⁇ assembly is additionally set before the start of the controlled processing.
  • the mounting distance ⁇ mounting ensures that between the There is sufficient clearance between the obstacle and the saw blade, or between the obstacle and the blade guard, to grip the blade or blade guard; as mounting distance, for example, 10 cm are suitable.
  • a minimum distance to the second end point (E 2 ) of B b .1 + ⁇ mounting for the first blade guard 21.1 and B b .2 + ⁇ assembly for the second blade guard 21.2 is basically required. Since the first blade guard width B.1 is smaller than the second blade guard width B.2, it is sufficient for symmetrical blade protectors to consider the second blade guard width B.2 when calculating the minimum clearance for mounting, with asymmetrical blade protectors both minimum clearances must be taken into account.
  • the pivot axis 23 must have a maximum distance of [B b .1 + ⁇ assembly , B b .2 + ⁇ M assembly ] to the obstacle at E 2 ( FIG. 6A ).
  • the necessary distances for pivoting the first saw blade 16.1 and for pivoting the second saw blade 16.2 at the second end point E 2 depend on the first main cutting angle ⁇ 1 of the first main section and the second main section angle ⁇ 2 of the second main section. It is to be distinguished between negative main cutting angles of -180 ° to 0 °, positive main cutting angle ⁇ from 0 ° to 90 ° and positive main section angle ⁇ from 90 ° to 180 °.
  • the critical angle ⁇ crit of ⁇ 90 ° must be taken into account, since the obstacle at the second end point E 2 must not be exceeded during the pivoting movement.
  • the control unit 29 selects as the parking position for the wall saw 12 the maximum value of [B b .1 + ⁇ mounting , B b .2 + ⁇ mounting ].
  • Negative second main cutting angles ⁇ 2 the pivoting of the second saw blade 16.2 on the side facing away from the obstacle and the control unit 29 selects as parking position for the wall saw 12, the maximum value of [B b .1 + ⁇ assembly , B b .2 + ⁇ assembly , B .1 b + ⁇ ⁇ sin (90 °)].
  • For positive second main cutting angles ⁇ 2 from 0 ° to 90 ° is for pivoting of the second saw blade 16.2 a distance of the pivot axis 23 of B B .2 + ⁇ ⁇ sin ( ⁇ 2 ) to the obstacle required and the control unit 29 selects as parking position for the wall saw 12, the maximum value of [B b .1 ⁇ assembly , B b .
  • the second saw blade edge 62 is used instead of the second blade guard edge 72 for calculating the minimum distances for the parking position and the second blade guard width B.2 is the blade diameter D.2 of the second saw blade 16.2 replaced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP14003099.0A 2014-09-08 2014-09-08 Verfahren zur Steuerung eines Wandsägesystems beim Erstellen eines Trennschnittes Withdrawn EP2993010A1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP14003099.0A EP2993010A1 (de) 2014-09-08 2014-09-08 Verfahren zur Steuerung eines Wandsägesystems beim Erstellen eines Trennschnittes
US15/509,425 US10821630B2 (en) 2014-09-08 2015-09-02 Method for controlling a wall saw system during the creation of a separation cut
EP15757272.8A EP3191279B1 (de) 2014-09-08 2015-09-02 Verfahren zur steuerung eines wandsägesystems beim erstellen eines trennschnittes
PCT/EP2015/070008 WO2016037911A1 (de) 2014-09-08 2015-09-02 Verfahren zur steuerung eines wandsägesystems beim erstellen eines trennschnittes
JP2017513084A JP6479168B2 (ja) 2014-09-08 2015-09-02 切込形成時のウォールソーシステムの制御方法

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EP15757272.8A Active EP3191279B1 (de) 2014-09-08 2015-09-02 Verfahren zur steuerung eines wandsägesystems beim erstellen eines trennschnittes

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EP2993015A1 (de) * 2014-09-08 2016-03-09 HILTI Aktiengesellschaft Verfahren zur Steuerung eines Wandsägesystems beim Erstellen eines Trennschnittes

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WO2014124912A1 (de) * 2013-02-14 2014-08-21 Hilti Aktiengesellschaft Verfahren zur steuerung eines gerätesystems mit einem werkzeuggerät und einer motorischen vorschubeinrichtung
WO2014124931A1 (de) * 2013-02-14 2014-08-21 Hilti Aktiengesellschaft Verfahren zur steuerung eines gerätesystems beim trennen eines werkstückes entlang einer trennlinie
WO2014128095A1 (de) * 2013-02-20 2014-08-28 Hilti Aktiengesellschaft Vorrichtung zum trennen eines werkstückes entlang einer trennlinie

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JPS49106678A (ja) * 1973-02-07 1974-10-09
EP1693173B1 (de) 2005-02-22 2013-11-27 HILTI Aktiengesellschaft Steuerverfahren einer steuerbaren Wandsäge
WO2014124912A1 (de) * 2013-02-14 2014-08-21 Hilti Aktiengesellschaft Verfahren zur steuerung eines gerätesystems mit einem werkzeuggerät und einer motorischen vorschubeinrichtung
WO2014124931A1 (de) * 2013-02-14 2014-08-21 Hilti Aktiengesellschaft Verfahren zur steuerung eines gerätesystems beim trennen eines werkstückes entlang einer trennlinie
WO2014128095A1 (de) * 2013-02-20 2014-08-28 Hilti Aktiengesellschaft Vorrichtung zum trennen eines werkstückes entlang einer trennlinie

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EP3191279B1 (de) 2020-11-04
JP6479168B2 (ja) 2019-03-06
JP2017532224A (ja) 2017-11-02
EP3191279A1 (de) 2017-07-19
US10821630B2 (en) 2020-11-03
WO2016037911A1 (de) 2016-03-17

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