EP3191280A1 - Procédé de commande d'un système de scie murale lors de la réalisation d'une coupe - Google Patents

Procédé de commande d'un système de scie murale lors de la réalisation d'une coupe

Info

Publication number
EP3191280A1
EP3191280A1 EP15759734.5A EP15759734A EP3191280A1 EP 3191280 A1 EP3191280 A1 EP 3191280A1 EP 15759734 A EP15759734 A EP 15759734A EP 3191280 A1 EP3191280 A1 EP 3191280A1
Authority
EP
European Patent Office
Prior art keywords
saw
end point
blade
coincides
saw 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.)
Pending
Application number
EP15759734.5A
Other languages
German (de)
English (en)
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
Publication of EP3191280A1 publication Critical patent/EP3191280A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B28D1/10—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with provision for measuring

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.
  • EP 1 693 173 B1 discloses a method for controlling a wall sawing system when creating a separating cut in a workpiece between a first end point and a second end point.
  • 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 operator places 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 may be the material of the workpiece to be machined 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 saw head After the start of the controlled processing, the saw head is positioned in a starting position. In the starting position, the saw arm is rotated in a negative direction around the
  • Pivoting pivoted and arranged under the negative first main cutting angle Pivoting pivoted and arranged under the negative first main cutting angle.
  • the saw head is moved in a positive feed direction along the guide rail in the direction of the second end point, wherein the saw arm during machining is in a pulling arrangement.
  • the saw arm Before reaching the second end point of the saw head is stopped and in a, opposite to the positive feed direction, negative feed direction sufficiently far back.
  • the saw arm is pivoted in a, opposite to the negative direction of rotation, positive direction of rotation from the negative first main section angle in a positive main section angle of the saw arm.
  • a first variant of the saw arm is pivoted from the negative first main section angle in the positive first main section angle and the saw head is moved in the positive feed direction to the second end point, wherein the saw arm is in an abutting arrangement.
  • the feed direction is reversed and the saw head is moved in the negative feed direction to the first end point, wherein the saw arm is in a pulling arrangement.
  • the saw arm is pivoted from the positive first main cutting angle to the negative first main cutting angle, and the saw head is moved in the negative feed direction toward the first end point with the saw arm in an abutting arrangement.
  • the saw arm is pivoted from the negative first main cutting angle into the positive second main cutting angle, and the saw head is moved in the positive feed direction to the second end point, wherein the saw arm is in an abutting arrangement.
  • the feed direction is reversed and the saw head is moved in the negative feed direction to the first end point, wherein the saw arm is in a pulling arrangement Before the first end point of the saw head is stopped and sufficiently far in the positive feed direction.
  • the saw arm is pivoted from the negative second main cutting angle to a positive main cutting angle and the saw head is moved in the negative feed direction to the first end point, wherein the saw arm is in a butting arrangement.
  • the saw arm When the second main section represents the last main section, the saw arm is pivoted to the positive second main section angle.
  • a third main section is performed with a third main section angle, the saw arm is swung from the negative second main section angle to the positive third main section angle of the third main section. The process steps are repeated until the final depth of the separation cut is reached.
  • the known method for controlling a wall sawing system has the disadvantage that the saw head is reset before machining in abutting arrangement of the saw arm. When resetting done only a positioning of the saw head and no machining of the workpiece. The time required for the positioning prolongs the non-productive time especially for short cuts.
  • the object of the present invention is to develop a method for controlling a wall sawing system with a high machining quality, in which the non-productive times for positioning the saw head and the saw arm are reduced.
  • the saw head is moved in the controlled by the control unit processing so that one, the second end point facing second boundary of the wall saw coincides with the second end point, wherein the second boundary of the wall saw by one, the second end point facing the second upper exit point of the saw blade used is formed on an upper side of the workpiece, when the second end point is not an obstacle, by a, the second end point facing, second saw blade edge of the saw blade used when the second end point is an obstacle and the processing is done without blade protection, and by a, the second end point facing, the second blade protection edge of the blade guard used when the second endpoint is an obstacle and the processing is done with blade protection.
  • the method according to the invention for controlling a wall sawing system has the advantage that a machining with a saw arm arranged in a pulling and pushing manner is possible and non-productive times for positioning the saw head are reduced by a corresponding position control of the saw head.
  • a narrow cutting gap is achieved in that the first main section of the main cutting sequence is basically done with a pulling saw arm arranged and the saw blade is guided in the following main sections with abutting saw arm through the narrow kerf of the first main section.
  • a separating cut, in which the saw arm is alternately pulled and pushed, has the advantage that the non-productive times necessary for positioning the saw head and pivoting the saw arm are reduced compared to machining with a saw arm arranged exclusively by pulling.
  • a saw arm length of the saw arm which is 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 and the top of the work piece are set.
  • 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.
  • a first width is additionally defined for a blade guard used in the first main section, and a second width for a blade guard used in the second main section, wherein the first and second widths each consist of a first distance of the rotation axis are assembled to the first blade guard edge and a second distance of the rotation axis to the second blade protection edge.
  • the first and second widths each consist of a first distance of the rotation axis are assembled to the first blade guard edge and a second distance of the rotation axis to the second blade protection edge.
  • the saw head is positioned in a, opposite to the positive feed direction, negative feed direction so that the second boundary of the wall saw coincides after the pivotal movement of the saw arm in the negative second main cutting angle with the second endpoint.
  • the saw head is moved in the controlled processing of the second main section so that one, the first end point facing first boundary of the wall saw coincides with the first end point, wherein the first boundary of the wall saw by a, the first end point facing first upper exit point of the saw blade used at the top of the workpiece is formed, if the first endpoint is not an obstacle, by a, the first end point facing first saw blade edge of the saw blade used when the first endpoint is an obstacle and the processing is done without blade protection, and by a, the first endpoint facing, the first blade protection edge of the blade guard used when the first endpoint is an obstacle and the processing is done with blade guard.
  • the second main section represents the last main section of the main cutting sequence and the wall saw is moved to an end position after the second main section.
  • the number of main cuts depends, among other things, on the specification of the saw blade used, the hardness of the material, the power and the torque of the drive motor for the saw blade and on the final depth of the separating cut.
  • the main cutting sequence has a, following the second main section, third main section having a third main cutting angle of the saw arm, a third diameter of the saw blade used and a third width of the blade guard used with a first and second distance, wherein the saw arm in the third main section is arranged in a pulling arrangement and the saw head is moved in the positive feed direction.
  • the saw head is positioned in the positive feed direction so that the first boundary of the wall saw coincides with the first end point after the pivoting movement of the saw arm into the negative third main cutting angle.
  • the first and second main sections are made with a saw blade and a blade guard, or alternatively, the first main section is performed by a first blade and a first blade guard, the first blade having a first blade diameter and the first blade guard having a first blade guard width, and the second major section becoming performed with a second saw blade and a second blade guard, wherein the second saw blade has a second blade diameter and the second blade guard a second blade guard width.
  • the number of main cuts and the saw blade diameter used depends, among other things, on the specification of the saw blade, the hardness of the material, the power and the torque of the drive motor for the saw blade and on the final depth of the separating cut.
  • the first main section of the main cutting sequence is a precut and the saw head is positioned after the start of controlled by the control unit processing parallel to the feed direction to a start position, wherein in the start position, the first end point facing the first boundary of the wall saw after the pivoting movement into the negative first main cutting angle coincides with the first end point, wherein the first boundary of the wall saw is formed by the first upper exit point of the saw blade used at the top of the workpiece, if the first end point is not an obstacle, by the first saw blade edge of the saw blade used if the first endpoint is an obstacle and the processing is done without blade protection, and by the first blade guard edge of the sheet Protection if the first endpoint is an obstacle and the processing is done with blade protection.
  • the first upper exit point coincides with the first end point if the pivot axis is at a distance from the first end point of V [h t (Ü! -H] - ⁇ sin (-a ! ),
  • the first saw blade edge of the saw blade used coincides with the first end point when the pivot axis at a distance to the first end point of -5 ' sin (-a)
  • the first blade guard edge of the blade guard used coincides with the first end point when the pivot axis is spaced from the first end point of B, a -5 sin (-a 1 ).
  • the saw head is moved with the, under the negative first main cutting angle, inclined saw arm in the positive feed direction and performed the first main section of the separating cut with a pull arranged saw arm.
  • a narrow cutting gap is achieved, which is a guide for the butting arranged saw arm in the following main sections.
  • the main cutting sequence comprises a pre-cut to be made before the first main cut with a zeroth main cutting angle of the saw arm, a zeroth diameter of the saw blade used and a zeroth width of the blade guard used with a first and second distance, wherein the saw arm at the pre-cut in a pulling arrangement is arranged and the saw head is moved in the negative feed direction.
  • a narrow cutting gap is achieved, which is a guide for the butting arranged saw arm in the following main sections.
  • the saw head is positioned after the start of controlled by the control unit processing parallel to the feed direction for the precut in a start position, wherein in the start position, the second end point facing, the second boundary of the wall saw after the pivoting movement in the positive zeroth main cutting angle with the second endpoint coincides.
  • the second upper exit point of the saw blade used coincides with the second end point when the pivot axis is at a distance from the second end point (E 2 ) of V [h 0 (D 0 -h 0 )] + ⁇ sin (+ ao),
  • the second saw edge of the used saw blade coincides with the second end point, when the pivot axis a distance from the second end point of DQ / 2 + ⁇ sin (+ oto) and the second blade guard edge of the blade guard used coincides with the second end point when the pivot axis is spaced from the second end point of B 0b + ⁇ sin (+ oco).
  • the saw head is moved with the, under the positive zeroth main cutting angle, inclined saw arm in the negative feed direction.
  • By pulling saw arm arranged a narrow cutting gap is achieved, which is a guide for the butting arranged saw arm in the following main sections.
  • the saw head is moved so that the first boundary of the wall saw coincides with the first end point, wherein the first boundary of the wall saw is formed by the first upper exit point of the saw blade used at the top of the workpiece, if the first end point is not an obstacle through the first saw blade edge of the saw blade used if the first end point is an obstacle and processing without blade protection, and by the first blade guard edge of the blade guard used, if the first endpoint is an obstacle and the processing is performed with blade guard.
  • the change from the pre-cut (zeroth main section) to the first main section can be done in different ways.
  • the variants differ in how the residual material of the precut is removed.
  • the material is completely removed in the pre-cut.
  • the saw arm is pivoted before reaching the first end point in the negative first main cutting angle and the residual material completely or at least partially removed.
  • a third variant dispenses with the removal and pivots the saw arm directly from the positive zeroth swivel angle in the negative first main section angle.
  • Pivot axis has a distance from the first end point of B 0a - ⁇ sin (-ao).
  • the saw head After swiveling the saw arm, the saw head is moved in the positive feed direction by a path length of at least 2 ⁇
  • the first boundary of the wall saw coincides with the first end point, wherein the first upper exit point of the ver saw blade coincides with the first end point when the pivot axis is at a distance from the first end point of ⁇ (DT - h t )] - ⁇ sin ⁇ o ⁇ ),
  • the first saw blade edge of the saw blade used coincides with the first end point when the pivot axis is a distance from the first end point of D, / 2 - ⁇ sin (- a 1 )
  • the first blade guard edge of the blade guard used coincides with the first end point when the
  • Pivoting axis has a distance to the first end point of B 1a - ⁇ sin ⁇ a,).
  • the method according to the invention applies to all major sections in which the main section angle is less than or equal to a critical pivot angle.
  • the critical swing angle is ⁇ 90 ° if the endpoint is an obstacle and the critical swing angle is 180 ° - arccos [A / (6 + D / 2)] if the endpoint is a free endpoint with no obstruction.
  • FIG. 1 a wall saw system with a guide rail and a wall saw
  • FIGS. 2A, B the processing of a separating cut between a first and second
  • FIGS. 3A, B the processing of a separating cut between a first and second
  • FIGS. 4A, B the processing of a separating cut between a first and second
  • FIGS. 5A-L show the wall sawing system of FIG. 1 when creating a separation cut between a first obstacle and a second free end point without obstruction.
  • FIG. 1 shows a wall saw system 10 having a guide rail 11, a tool device 12 displaceably arranged on the guide rail 11 and a remote control 13.
  • the tool device is designed as a wall saw 12 and comprises a machining unit 14 and a motorized feed unit 15.
  • the machining unit is a saw head 14 formed and includes a trained as a saw blade machining tool 16 which is fixed to a saw arm 17 and is driven by a drive motor 18 about a rotation axis 19.
  • 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 slidably formed on the feed motor 27 along the guide rail 1 1 in a feed direction 28.
  • 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 travel 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 in the form of an infrared, Bluetooth, Wi-Fi or Wi-Fi connection.
  • FIGS. 2A, B show the guide rail 1 1 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 Ei and a second end point E 2 .
  • a direction parallel to the feed direction 28 is defined, wherein the positive X direction is directed from the first end point ET to the second end point E 2 , and as the Y direction is a direction perpendicular to the X direction in the depth of the workpiece 24th Are 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.
  • B form the end points E 1 t E 2 free end points without obstruction, wherein at the free first end point egg overlapping is not permitted and at the second end point E 2, an overlapping 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 1 1.
  • the mounting position X 0 of the saw head 14 is between the first and second end point E ⁇ E 2 and is determined by the position of the pivot axis 23 in the feed direction 28.
  • 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 Swivel 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 t E 2 are defined in the exemplary embodiment by entering partial lengths.
  • the distance between the mounting position X 0 and the first end point E determines a first part length 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 ,, E 2 can be defined by entering a partial length (Li or L 2 ) and a total length L as the distance between the end points E 1 t 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 ,, 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 1 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 ⁇ 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 pivoting angle is 0 ° and the axis of rotation 19 of the saw blade 16 lies in the depth direction 52 above the pivot axis 23.
  • the saw blade 16 is moved by a pivoting movement of the saw arm 7 about the pivot axis 23 from the basic position at 0 ° in the workpiece 24 , During the pivoting movement of the saw arm 17, 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 can 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. FIG. 2B shows the saw arm 17, which is inclined in a negative rotational direction 54 at a negative tilt angle -oc.
  • 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 °.
  • the in FIG. 2B 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.
  • Swivel axis 23 the position of the rotation axis 19 is moved in the X direction and in the Y direction.
  • the displacement of the axis of rotation 19 of the workinggearmin ⁇ and the Swivel angle o of the saw arm 17 dependent.
  • the displacement ⁇ ⁇ in the X direction is ⁇ sin ( ⁇ a) and the displacement path 5y in the Y direction is ⁇ cos ( ⁇ a).
  • 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
  • ⁇ the vertical distance between the pivot axis 23 and the upper side 53 of the workpiece 24
  • h denotes the penetration depth of the saw blade 16 into the workpiece 24 and D the saw blade diameter.
  • 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 ⁇ ⁇ the axis of rotation 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.
  • end points E, E 2 are defined as obstacles, it is not possible to drive over the end points E 1 , E 2 with the wall saw 12.
  • a processing without blade guard 21 and a processing with blade guard 21.
  • FIGS. 3A, B show the wall sawing system 10 in creating a separation cut between the first end point Ei and the second end point E Z) which are defined as obstacles, wherein the machining takes place without blade guard 21.
  • first saw blade edge 61 which faces the first end point E
  • second saw blade edge 62 which faces the second end point E 2
  • 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 ⁇ "of the rotation axis 19 and the saw blade diameter D.
  • FIG. 3A shows the wall saw 12 with the saw arm tilted in the negative rotational direction 54 at a negative swivel angle -a (0 ° to -180 °).
  • X (61) X Re f + ⁇ sin (-) a) - D / 2
  • X (62) X Re ( + ⁇ sin (-a) + D / 2)
  • Figure 3B shows the wall saw 12 with the, in the positive direction of rotation 55 under a positive swivel angle ⁇ (0 ° to + 180 °), inclined saw arm 17.
  • FIGS. 4A, B show the wall saw system 10 in making a separation cut between the first end point and the second end point E 2 , which are defined as obstacles, wherein the processing with blade guard 21 is performed.
  • processing without blade guard 21 form a first blade protection edge 71, which faces the first end point E, and a 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 ⁇ ⁇ of the rotation axis 19 and the blade guard width B.
  • FIG. 4A shows the wall saw 12 with the saw arm 17 tilted at a negative pivot angle -oc (0 ° to -180 °) and the blade guard 21 mounted blade guard 21.
  • the distances of the rotation axis become 19 determined to the blade protection edges 71, 72, wherein the distance to the first blade protection edge 71 as the 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 saw arm 17 inclined at a positive pivoting angle ⁇ (0 ° to + 180 °) and the blade guard 21 mounted on the blade guard width B.
  • X (71) X Ref + ⁇ sin (a) -Ba
  • X (72) X Re i + ⁇ sin (a) + B b .
  • FIGS. 2A, B show a separating section between two end points ⁇ ⁇ , E 2 , which are defined as free end points without an obstacle
  • FIG. 3A, B and 4A, B show a separation section between two end points E t E 2 , which are defined as obstacles.
  • cuts are also possible in which one end point is defined as an obstacle and the other end point represents a free end point without hindrance, whereby the control of the wall area ge at the free end point on the upper exit point of the saw blade and the 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-L show the wall saw system 10 of FIG. 1 with the guide rail 1 1 and the wall saw 12 when creating a separation cut of the final depth T in the workpiece 24 between a first end point E ⁇ is an obstacle, and a second end point E 2 , which represents a free end point without obstruction.
  • 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 first main section having a first main cutting angle Oi of the saw arm 17, a first diameter Di and a first penetration depth h n of the saw blade used, a second main section having a second main cutting angle ota 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 having a third main section angle a 3 of the saw arm 17, a third diameter D 3 and a third penetration depth h 3 of the saw blade used.
  • the first, second and third main section are performed in the embodiment of the saw blade 16 with the saw blade diameter D and the blade guard 21 with the blade guard width B.
  • the diameters Di, D 2 , D 3 of the main sections coincide with the saw blade diameter D of the saw blade 16, and the widths B ( B 2 , B 3 of the main sections coincide with the blade guard width B of the blade guard 21.
  • the main sections are performed in the method according to the invention with a saw arm 17, which 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 non-productive times necessary for positioning the saw head 14 and pivoting the saw arm 17 are reduced compared to machining with a saw arm 17 which is exclusively pulled.
  • the saw arm 17 is arranged in the three main sections each in the negative direction of rotation 54.
  • the editing of the separation cut begins at the first end point E ,.
  • the saw head 14 is positioned in a start position X S t a rt in which the pivot axis 23 is at a distance of> / [h, ⁇ (D, -h,)] - ⁇ sin (-a,).
  • the saw arm 17 is pivoted from the basic position at 0 ° in the negative direction of rotation 54 in the negative first main section angle -at. After the pivoting movement into the negative first main section angle -a, the first blade protection edge 71 of the blade guard 21 adjoins the obstacle at the first end point Ei. Subsequently, the saw head 14 is moved in the positive feed direction 56 with the saw arm 17, which is inclined under the negative first main cutting angle ⁇ ,, and the rotating saw blade 16 (FIG. 5A). During the feed movement, the position of the saw head 14 is regularly measured by the displacement sensor 33.
  • the saw arm 17 is pivoted from the negative first main intercept angle-0 ⁇ to the negative second main intercept angle -a 2 (FIG.
  • the distance is adjusted so that the second end point E 2, facing the second end point E 2 , of the saw blade 16 after the pivoting movement of the saw blade 16 arms 17 coincide in the negative second main section angle -a 2 with the second end point E 2 .
  • the saw head 14 is in the negative feed direction 57 to the first end point E, to move, wherein the position of the saw head 14 during the advancing movement of the displacement sensor 33 is measured regularly.
  • the advancing movement of the saw head 14 is stopped when the pivot axis 23 has a distance of B / 2 - ⁇ sin (-a 2 ) to the first end point E ,.
  • the first blade guard edge 71 of the blade guard 21 adjoins the obstacle at the first end point E 1 and the second major section is completed (FIG. 5E).
  • the pivoting movement from the negative second main cutting angle -a 2 into the negative third main cutting angle -a 3 takes place in the exemplary embodiment in two steps with a first intermediate angle - ⁇ ,.
  • the division of the pivoting movement in at least two steps reduces the risk that a polishing of the saw blade 16 occurs.
  • a smaller swing angle results in reducing the arc length of the saw blade engaged with the workpiece.
  • the pivoting movement into the negative second main cutting angle -oc 2 can take place in several steps or the pivoting movement into the negative third main cutting angle -a 3 in one step.
  • the decision as to how many steps are required depends, among other things, on the specification of the saw blade, the hardness of the material and the power and torque of the drive motor for the saw blade.
  • the intermediate angles can be specified by the operator or the control unit of the wall sawing system determines the intermediate angles depending on different boundary conditions.
  • the main cutting angles of the main cuts and possible intermediate angles represent an input variable which is used to control the wall saw.
  • the saw head 14 Before the pivoting movement of the saw arm 17 in the first intermediate angle -ß, positioning of the saw head 14 is carried out. Since the positioning of the obstacle egg is carried out and the first intermediate angle - ⁇ i is greater than -90 °, it is not possible, the saw head 14 so position the second blade guard edge 72 adjacent to the obstacle E 1 after pivotal movement into the first intermediate angle. The positioning of the saw head 14 takes place by means of the critical angle a kri of -90 ° (FIG. 5F) and the saw arm 17 is pivoted to the first intermediate angle (FIG. 5G).
  • the critical angle a kri t of -90 ° must be taken into account, since the first end point E must not be exceeded during the swiveling movement.
  • the saw head 14 is moved in the negative feed direction 57 to the first end point E ⁇ .
  • the advancing movement of the saw head 14 is stopped when the pivot axis 23 has a distance of B / 2 - ⁇ sin (- ⁇ ,) to the first end point Ei.
  • the first blade protection edge 71 of the blade guard 21 adjoins the obstacle at the first end point E 1 (FIG. 51).
  • the saw head 14 is positioned by means of the critical angle cx k nt of -90 ° in the feed direction 28 (FIG. 5J) and the saw arm 17 is pivoted from the first intermediate angle to the negative third main cutting angle -a 3 (FIG. 5K).
  • FIG. 51 and FIG. 5J are summarized.
  • the saw head 14 is moved in the negative feed direction 57 to the first end point E, and the advancing movement of the saw head 14 is stopped when the pivot axis 23 has a distance of B / 2 - ⁇ sin (- ⁇ i) to the first end point E t .
  • the saw arm 17 is pivoted from the first intermediate angle - ⁇ , into the negative third main cutting angle -a 3 .
  • the saw head 14 is moved in the negative feed direction 57 with the saw arm inclined at -a 3 until the first blade guard edge 71 of the blade guard 21 adjoins the obstacle at the first end point Ei (FIG. 5L).
  • the corner processing of the first end point E can be improved when the blade guard 21 is dismantled and the corner processing takes place without blade protection. Without blade protection, the saw head 14 is moved with the saw arm 17 inclined under -oc 3 in the negative feed direction 57, until the first saw blade edge 61 of the saw blade 16 coincides with the first end point ET.
  • the corner processing on the obstacle ET can also be performed in several steps with intermediate angles.
  • the saw arm 17 is moved after the pivoting movement in the third pivot angle -a 3 in an initial position and pivoted in the initial position in the first intermediate angle.
  • the initial position is calculated so that the pivoting movement takes place in all intermediate angles of the corner processing before the first end point ET and the first end point E ⁇ is not exceeded.
  • saw arm 17 of the saw head 14 is moved in the negative feed direction 57 until the pivot axis 23 has a distance of B / 2 to the first end point E ⁇ and the first blade edge 71 to the obstacle E, adjacent.
  • the saw head 14 is set back to the initial position, the saw arm 17 pivoted to the next intermediate angle and the saw head 14 with the inclined saw arm 17 in the negative feed direction 57 until the first blade edge 71 adjacent to the obstacle egg.
  • These process steps are repeated until the saw head 14 with the saw arm 17 inclined at the third swivel angle -a 3 is arranged in a position such that the first blade guard edge 71 adjoins the obstacle ET.
  • the corner processing in several intermediate steps can be performed without blade guard 21.
  • the third partial cut is carried out with the saw arm 17 tilted under the negative third swivel angle -oc 3 in the positive feed direction 56 (FIG. 5M).
  • the corner processing can be performed at the second end point E 2 in several steps with intermediate angles.
  • the saw arm 17 is moved after the end of the third partial section in an initial position and pivoted in the initial position in the first intermediate angle. The initial position is calculated so that the pivoting movement takes place in all intermediate angles of the corner processing before the second end point E 2 and the second end point E 2 is not exceeded.
  • the saw head 14 is set back to the initial position, the saw arm 17 is pivoted to the next intermediate angle and the Saw head 14 moves with the inclined saw arm 17 in the end position in the positive feed direction 56. These method steps are repeated until the saw head 14 is arranged with the saw arm 17 inclined at the third pivot angle -oc 3 in the end position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

L'invention concerne un procédé de commande d'un système de scie murale (10) lors de la réalisation d'une coupe de séparation dans une pièce (24) entre un premier et un second point limite. Le système de scie murale (10) comprend une scie murale (12) comprenant une tête de scie (14), un bras de scie (17) pivotant, une lame de scie (16) et un carter de lame (21). La coupe de séparation est effectuée en plusieurs coupes principales, les paramètres des coupes principales (angle de coupe principale) étant fixés avant le lancement d'une séquence de coupes principales. Le mouvement de la tête de scie (14) est commandé au niveau des points limites de telle sorte qu'une limite de la scie murale (12) orientée vers le point limite coïncide avec ce point limite. En cas de point limite libre, la limite de la scie murale (12) est formée par un point de sortie supérieur de la lame de scie (16) et, en cas d'obstacle, par l'arête de la lame de scie (16) si le travail est effectué sans carter de lame (21) ou par l'arête du carter de lame (21) si le travail est effectué avec carter de lame (21).
EP15759734.5A 2014-09-08 2015-09-02 Procédé de commande d'un système de scie murale lors de la réalisation d'une coupe Pending EP3191280A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14003102.2A EP2993013A1 (fr) 2014-09-08 2014-09-08 Procédé de commande d'un système de scie murale par sciage en long
PCT/EP2015/069984 WO2016037906A1 (fr) 2014-09-08 2015-09-02 Procédé de commande d'un système de scie murale lors de la réalisation d'une coupe

Publications (1)

Publication Number Publication Date
EP3191280A1 true EP3191280A1 (fr) 2017-07-19

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EP14003102.2A Withdrawn EP2993013A1 (fr) 2014-09-08 2014-09-08 Procédé de commande d'un système de scie murale par sciage en long
EP15759734.5A Pending EP3191280A1 (fr) 2014-09-08 2015-09-02 Procédé de commande d'un système de scie murale lors de la réalisation d'une coupe

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EP14003102.2A Withdrawn EP2993013A1 (fr) 2014-09-08 2014-09-08 Procédé de commande d'un système de scie murale par sciage en long

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US (1) US20170282405A1 (fr)
EP (2) EP2993013A1 (fr)
JP (1) JP6487535B2 (fr)
WO (1) WO2016037906A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP2993015A1 (fr) * 2014-09-08 2016-03-09 HILTI Aktiengesellschaft Procédé de commande d'un système de scie murale par sciage en long
JP6328736B1 (ja) * 2016-12-05 2018-05-23 川田工業株式会社 橋梁の既設コンクリートの撤去方法

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Publication number Priority date Publication date Assignee Title
DE102005000013A1 (de) * 2005-02-22 2006-08-31 Hilti Ag Steuerbare Wandsäge und Steuerverfahren
EP2269286B1 (fr) * 2008-02-29 2021-11-24 Husqvarna AB Scie électrique
DE102009026638A1 (de) * 2009-06-02 2010-12-16 Hilti Aktiengesellschaft Vorrichtung zum Verstellen eines Blattschutzhalters einer Wandsäge
WO2012105876A1 (fr) * 2011-02-03 2012-08-09 Husqvarna Ab Scie à murs ou planchers
DE102011089878A1 (de) * 2011-12-23 2013-06-27 Hilti Aktiengesellschaft Vorrichtung zur Trennung eines Untergrundes und Verfahren zur Steuerung einer derartigen Trennvorrichtung
DE102013202445A1 (de) * 2013-02-14 2014-08-14 Hilti Aktiengesellschaft Verfahren zur Steuerung eines Gerätesystems beim Trennen eines Werkstückes entlang einer Trennlinie
DE102013202442B4 (de) * 2013-02-14 2014-09-25 Hilti Aktiengesellschaft Verfahren zur Steuerung eines Gerätesystems mit einem Werkzeuggerät und einer motorischen Vorschubeinrichtung
DE102013202754A1 (de) * 2013-02-20 2014-08-21 Hilti Aktiengesellschaft Vorrichtung zum Trennen eines Werkstückes entlang einer Trennlinie

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Also Published As

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JP6487535B2 (ja) 2019-03-20
EP2993013A1 (fr) 2016-03-09
JP2017532225A (ja) 2017-11-02
US20170282405A1 (en) 2017-10-05
WO2016037906A1 (fr) 2016-03-17

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