Device for cutting plurality of grooves in workpiece

Abstract

The present disclosure provides an apparatus for cutting a plurality of slots in a workpiece. The apparatus is computerized numerical control and is configured to cut a plurality of slots in accordance with information defining a cutting pattern. The apparatus includes: a controller for receiving information including numerical data defining a cutting pattern for a workpiece; at least one table for supporting a first surface of a corresponding workpiece; and a cutter comprising a plurality of cutters. The cutting machine is configured such that a position of at least one of the plurality of cutters in a direction parallel to the x-axis is controllable by the controller relative to a position of another of the plurality of cutters in the direction parallel to the x-axis so that a spacing between at least two adjacent ones of the plurality of slots can be controlled. The cutting machine is further configured such that a position of at least one of the plurality of cutters in a direction parallel to the z-axis is controllable by the controller to enable control of a depth of the at least one slot. At least one of the cutting machine and the at least one workbench is movable relative to the other to cut a plurality of slots on the second surface of the workpiece. The present disclosure enhances the flexibility of cutting various groove patterns in a workpiece.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an apparatus for cutting a plurality of grooves in a workpiece. BACKGROUND

[0002] It is known to provide a workpiece or structural material having a pattern of cuts or grooves in one or more surfaces of the structural material to the skilled person in the field of manufacture. The grooves can provide functionality to the structural material that is above and beyond the inherent properties or characteristics of the material.

[0003] For example, in the field of wind turbine manufacture, it is known to provide a foam or balsa wood as a core material in a kit of core structural materials. A pattern of grooves can be cut in one or more surfaces of the material at a selected pitch and at a selected depth to make the material more conformable or drapable. For example, the grooves can be provided so that the core material can more easily conform to the inner surface of a wind turbine blade mould. Additionally or alternatively, the grooves can be provided in the surface of the material so that the grooves facilitate the passage of resin along or through the core material during a resin transfer moulding (RTM) process.

[0004] For example, EP4065841A1 discloses a core material for a wind turbine blade having grooves cut therein to enhance the drapability of the core material.

[0005] The present disclosure has identified the problem of a lack of flexibility in known methods for the patterns of grooves that can be formed. For example, known cutting machines have a plurality of cutting elements arranged at a fixed pitch from one another. A plurality of grooves can be cut in a single pass of the workpiece, but the pitch between adjacent grooves and the depth of each groove is fixed, or at least cannot be readily adjusted between “runs”. As such, for efficiency of manufacture, standard groove depths and groove pitches can be provided, even if these pitches and depths are sub-optimal for a given purpose.

[0006] Accordingly, it is determined in the present disclosure that there is a need for a cutting apparatus that provides enhanced flexibility with respect to enabling an operator to cut a variety of groove patterns in a workpiece. SUMMARY

[0007] In a first aspect, there is provided an apparatus for cutting a plurality of grooves in a workpiece. The apparatus is computer numerically controlled and configured to cut the plurality of grooves in accordance with information defining a cutting pattern. The apparatus comprises a controller for receiving information comprising numerical data defining a cutting pattern for a workpiece; at least one table for supporting a first surface of a respective workpiece; and a cutting machine comprising a plurality of cutters. The plurality of cutters are arranged spaced apart from the at least one table and configured to cut the plurality of grooves in a second surface of the workpiece opposite the first surface when the workpiece is supported on the at least one table. The plurality of grooves conform to the cutting pattern defined for the workpiece. Each of the cutters is configured to cut a respective groove in the second surface, and the plurality of cutters are controlled by the controller to cut the plurality of grooves in an x-y-z coordinate system, where the x-y plane is parallel to a surface of the at least one table, and the z-axis is orthogonal to the x-y plane. The cutting machine is configured such that a position of at least one of the plurality of cutters in a direction parallel to the x-axis is controllable by the controller relative to a position of another of the plurality of cutters in the direction parallel to the x-axis to enable control of a spacing between at least two adjacent grooves of the plurality of grooves. The cutting machine is configured such that a position of the at least one of the plurality of cutters in a direction parallel to the z-axis is controllable by the controller to enable control of a depth of at least one of the plurality of grooves. At least one of the cutting machine and the at least one table is movable relative to the other of the cutting machine and the at least one table in the x-y plane or a plane parallel to the x-y plane and in a direction parallel to the y-axis or at an angle to the y-axis for cutting the plurality of grooves on the second surface of the workpiece.

[0008] In one or more embodiments, the spacing between the at least two adjacent grooves is variable between 10 mm and 300 mm.

[0009] In one or more embodiments, the depth of the at least one groove is variable between 1 mm and 100 mm.

[0010] In one or more embodiments, the position of each of the plurality of cutters is individually adjustable in a direction parallel to the x-axis.

[0011] In one or more embodiments, each of the plurality of cutters comprises a respective first servo motor for enabling the position to be individually adjustable in the direction parallel to the x-axis.

[0012] In one or more embodiments, the position of each cutter of the plurality of cutters can be individually adjusted in a direction parallel to the z-axis.

[0013] In one or more embodiments, each cutter of the plurality of cutters comprises a respective second servo motor for enabling individual adjustment of the position in a direction parallel to the z-axis.

[0014] In one or more embodiments, the cutting machine and the at least one work table are configured such that when at least one of the cutting machine and the at least one work table moves relative to each other to cut the plurality of grooves on the surface of the workpiece, (i) the cutting machine remains stationary while the at least one work table moves; (ii) the at least one work table remains stationary while the cutting machine moves; or (iii) both the at least one work table and the cutting machine move.

[0015] In one or more embodiments, the apparatus comprises at least one stage for supporting the cutting machine.

[0016] In one or more embodiments, the at least one gantry extends in a longitudinal direction parallel to the x-axis, and the cutting machine is configured to move back and forth along the longitudinal axis of the gantry.

[0017] In one or more embodiments, the cutting machine includes a first cutting machine assembly and a second cutting machine assembly, the first cutting machine assembly is mounted on a first stage, the second cutting machine assembly is mounted on a second stage, each of the first stage and the second stage extends along a longitudinal direction parallel to the x-axis, the second stage is mounted behind the first stage along the y-direction, the first cutting machine assembly is configured to move back and forth between at least a first cutting position and a second cutting position of the first cutting machine assembly along the longitudinal direction of the first stage, and the second cutting machine assembly is capable of moving back and forth between at least a first cutting position and a second cutting position of the second cutting machine assembly along the longitudinal direction of the second stage.

[0018] In one or more embodiments, the at least one workbench for supporting the workpiece includes a first workbench for supporting the first workpiece and a second workbench for supporting the second workpiece, wherein the first workbench is configured to reciprocate back and forth along the y direction so that the first workbench can be selectively moved to the first cutting position of the first cutting machine assembly or the first cutting position of the second cutting machine assembly, and the second workbench is configured to reciprocate back and forth in the y direction so that the second workbench can be selectively moved to the second cutting position of the first cutting machine assembly or the second cutting position of the second cutting machine assembly.

[0019] In one or more embodiments, the device is configured to cut a first group of grooves among the multiple grooves in a first process of the corresponding workpiece passing through the first cutting machine and the second cutting machine, and after changing the position of the first cutting machine and the second cutting machine and / or after changing the position of at least one cutter of the first cutting machine and the second cutting machine, cut a second group of grooves among the multiple grooves in a second process of the corresponding workpiece passing through the first cutting machine and the second cutting machine in a direction opposite to the first process.

[0020] In one or more embodiments, the angle of the stage relative to the y-axis is adjustable so that the plurality of grooves can be cut on the second surface of the workpiece at an angle to the y-axis.

[0021] In one or more embodiments, the stage is capable of rotating about a pivot point between a range of angles relative to the y-axis.

[0022] In one or more embodiments, the angular range includes a range between +60 degrees and -60 degrees, and preferably, the angular range includes a range between +45 degrees and -45 degrees.

[0023] In one or more embodiments, the apparatus includes a conveyor system having a first conveyor portion for conveying the workpiece to an entrance area of ​​the apparatus before being cut by the cutting machine, and a second conveyor portion for conveying the workpiece away from the apparatus after being cut by the cutting machine.

[0024] In one or more embodiments, the at least one workbench includes an adsorption table for firmly holding the workpiece on the at least one workbench.

[0025] In one or more embodiments, the plurality of cutters includes two or more cutters, and preferably includes eight cutters.

[0026] In one or more embodiments, one or more of the cutters comprises a saw blade.

[0027] In one or more embodiments, one or more of the cutters include a hot wire cutter; or a laser cutter; or a milling head.

[0028] In one or more embodiments, the cutting machine is configured to cut slots in any of the following: a foam workpiece; a polymer foam workpiece; a PET foam workpiece; a wooden workpiece; or a balsa wood workpiece.

[0029] In one or more embodiments, the device includes a user interface for enabling an operator to control one or more parameters of the device and / or for displaying information to the operator.

[0030] In one or more embodiments, the device is in communication with a computing device, and the device is configured to receive numerical data defining the cutting pattern from the computing device.

[0031] In one or more embodiments, the apparatus comprises a housing, and at least the cutting machine is located within the housing, and the housing comprises a ventilation system for extracting dust or particles from within the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 An apparatus for cutting a plurality of grooves in a workpiece according to an example of a first embodiment is schematically shown.

[0033] Figure 2 Further shown is an apparatus for cutting a plurality of grooves in a workpiece according to an example of a first embodiment.

[0034] Figure 3 The cutter of the device according to the first embodiment is shown in more detail.

[0035] Figure 4 An apparatus for cutting a plurality of grooves in a workpiece according to an example of a second embodiment is schematically shown.

[0036] Figure 5 yes Figure 4 A floor plan of the equipment.

[0037] Figure 6 Components of the apparatus of the second embodiment are shown in more detail.

[0038] Figure 7 A housing that can be used to house the components of the apparatus of the first and second embodiments is schematically shown. DETAILED DESCRIPTION

[0039] Figure 1 and Figure 2 A manufacturing area or manufacturing system 100 is schematically shown.

[0040] System 100 includes an apparatus 102. Apparatus 102 is used to cut a plurality of grooves in a workpiece 104 (see Figure 2Workpiece 104 may also be referred to as a material or material segment, a core material segment, or the like. Apparatus 102 is computer numerically controlled (CNC) and configured to cut a plurality of slots according to information defining a cutting pattern. One or more cutting patterns may be generated by an operator via an associated computer-aided drafting software package, and / or one or more cutting patterns may be generated by a computer program based on one or more design parameters, and the one or more cutting patterns may be transmitted or transferred to apparatus 102.

[0041] like Figure 1 As shown, the apparatus includes a controller, schematically shown at 106. Controller 106 is configured to receive numerical data defining a cutting pattern for a workpiece (e.g., workpiece 104). Other workpieces may be subjected to the same or different corresponding slot cutting patterns. Controller 106 may include one or more memories and one or more processors. Controller 106 may include a microcontroller.

[0042] A power supply is schematically shown at 109 and is used to power one or more components within the system. In some examples, the power supply 109 includes a primary power supply. In some examples, an auxiliary power supply may also be provided in the event of a failure of the power supply 109.

[0043] The apparatus 102 includes at least one work table 112 for supporting a first surface of a corresponding workpiece, such as the workpiece 104. For example, the first surface of the workpiece may include a lower surface or bottom surface 103 of the workpiece 104. In some examples, the height of the at least one work table 112 is adjustable (e.g., via a scissor lift mechanism) to accommodate the height of the operator 101.

[0044] The apparatus 102 includes a cutting machine, generally indicated at 110. The cutting machine 110 includes a plurality of cutters 114. The cutters 114 are arranged in a spaced relationship from a worktable 112. The cutters 114 are configured to cut a plurality of grooves in a second surface of the workpiece, opposite the first surface, when the workpiece is supported on the worktable 112. For example, the second surface of the workpiece may include the upper or top surface 105 of the workpiece 104. The plurality of grooves are cut according to a cutting pattern defined for the workpiece. Each of the plurality of cutters 114 is configured to cut a corresponding groove in the second surface 105, and the plurality of cutters 114 are controlled by a controller 106 to cut the grooves in an xyz coordinate system. In the xyz coordinate system, the xy plane is parallel to the surface of the worktable, and the z axis is orthogonal to the xy plane. The surface of the worktable may be the upper surface of the worktable, which is arranged to contact the first surface of the workpiece to support the workpiece. Grooves may also be referred to as slots, channels, or the like.

[0045] In an example, the cutting pattern for the plurality of grooves may define one or more of: the number or quantity of grooves; the distance between two or more adjacent grooves in the x-direction; the angle of one or more grooves relative to the y-direction; the depth of one or more grooves.

[0046] When reference is made to the x-direction or x-axis direction, it can be considered to be a direction along the x-axis or parallel to the x-axis. When reference is made to the y-direction or y-axis direction, it can be considered to be a direction along the y-axis or parallel to the y-axis. When reference is made to the z-direction or z-axis direction, it can be considered to be a direction along the z-axis or parallel to the z-axis.

[0047] In some examples, at least one of the plurality of cutters 114 comprises a saw. In some examples, each of the plurality of cutters 114 comprises a saw. The saw can include a rotating saw blade or saw disk. In some examples, each of the one or more saw blades has a width of 1.5 mm (or approximately 1.5 mm).

[0048] However, it should be appreciated that other types of cutters may be used. For example, as non-limiting examples, one or more (or all) of the plurality of cutters 114 may include any one or any combination of the following: a hot wire cutter; a laser cutter; a plasma cutter; or a milling head.

[0049] The cutting machine is configured such that the position of at least one of the plurality of cutters 114 in the x-axis direction can be controlled by the controller 106 relative to the position of another of the plurality of cutters 114 in the x-axis direction. This enables control of the spacing between at least two adjacent grooves in the plurality of grooves. In other words, the cutting machine 102 is not limited to a fixed spacing between adjacent grooves in the x-direction. In some examples, the spacing of one or more grooves in the x-direction can vary within a single workpiece. Alternatively, the spacing of the grooves in the x-direction can remain consistent within a single workpiece but vary for subsequent workpieces.

[0050] According to some examples, the pitch or spacing between at least two adjacent slots may vary between 10 mm (or about 10 mm) and 300 mm (or about 300 mm).In some examples, slot spacings greater than 300 mm are possible.

[0051] The cutting machine 110 is configured such that the position of at least one of the plurality of cutters 114 in the z-direction can be controlled by the controller 106, thereby enabling control of the depth of at least one groove. In other words, the cutting machine 102 is not constrained to cut a fixed groove depth in the z-direction. In some examples, the depth of one or more grooves in the z-direction may vary within a single workpiece. Alternatively, the groove depth in the z-direction may remain consistent within a single workpiece but vary for subsequent workpieces. The groove depth may also vary along the length of the groove.

[0052] According to some examples, the depth of the at least one groove may vary between 1 mm (or about 1 mm) and 100 mm (or about 100 mm). According to some examples, the depth of the at least one groove may vary between 1 mm (or about 1 mm) and 100 mm (or about 100 mm).

[0053] According to some examples, the width of each groove can vary between 0.5 mm (or approximately 0.5 mm) and 10 mm (or approximately 10 mm). According to some examples, each groove has a width of 1.5 mm (or approximately 1.5 mm). If the cutter is a saw blade, the width of the groove depends on the width of the saw blade. For example, the width of the saw blade can vary between 0.5 mm and 10 mm. In some examples, the saw blade can also be configured to cut the groove at a certain angle across the workpiece.

[0054] At least one of the cutting machine 110 and the table 112 can move relative to the other of the cutting machine 110 and the table 112 in an xy plane or a plane parallel to the xy plane and in a direction parallel to the y axis or at an angle to the y axis to cut a plurality of grooves on the surface of the workpiece 104. In some examples, when the cutting machine 110 and the table 112 are positioned relative to each other, the relative motion between the cutting machine 110 and the table 112 is or is approximately 1 m / s (60 m / min). During the groove cutting operation, the relative speed between the cutting machine 110 and the table 112 can be between 1 m / min and 15 m / min (or between approximately 1 m / min and 15 m / min).

[0055] In one example, the cutting machine 110 and the table 112 are configured such that when at least one of the cutting machine 110 and the table 112 moves relative to each other to cut a plurality of grooves in the surface of the workpiece 104, the cutting machine 110 remains stationary while the table moves. For example, the table can be configured to move at or about 1 m / s. For example, the table 112 can be configured to move back and forth in the y-direction.

[0056] In one example, the cutting machine 110 and the table 112 are configured such that when at least one of the cutting machine 110 and the table 112 moves relative to each other to cut a plurality of grooves in the surface of the workpiece 104, the table 112 remains stationary while the cutting machine 110 moves. For example, the cutting machine 110 can be configured to move at or about 1 m / s. For example, the cutting machine 110 can be configured to move back and forth in the y-direction or at an angle to the y-direction.

[0057] In one example, the cutting machine 110 and the table 112 are configured such that both the table 112 and the cutting machine 110 move when at least one of the cutting machine 110 and the table 112 moves relative to each other to cut a plurality of grooves in the surface of the workpiece 104. For example, both the cutting machine 110 and the table 112 can be configured to move back and forth in the y-direction.

[0058] Of course, the cutting machine 110 remaining stationary mentioned here means that the entire body of the cutting machine 110 remains stationary, but does not exclude the movement of components of the cutting machine 110 (such as a saw blade).

[0059] In some examples, the cutting machine 110 is mounted on at least one gantry (or gantry) 118 for supporting the cutting machine 110. The at least one gantry 118 extends in a longitudinal direction along a longitudinal axis of the gantry 118 that is parallel to the x-axis. In some examples, the cutting machine 110 can reciprocate back and forth along the at least one gantry 118. In some examples, the cutting machine 110 can reciprocate back and forth on the at least one gantry 118 along the longitudinal axis of the gantry 118 (i.e., in a direction parallel to the x-axis). This enables the cutting machine 110 to move between multiple positions along the longitudinal axis of the gantry 118. In some examples, the movement of the cutting machine 110 along the at least one gantry 118 is achieved via a rack and pinion arrangement 152.

[0060] Figure 2 and Figure 3 An example of a cutting machine 110 is shown in greater detail. The cutting machine 110 includes a first cutting machine assembly 116 mounted on a first gantry 118. The cutting machine 110 also includes a second cutting machine assembly 120 mounted on a second gantry 122. In other examples, only one cutting machine assembly is provided, such as only the first cutting machine assembly 116 mounted on the first gantry 118. In other examples, more than two cutting machine assemblies are provided, possibly with additional corresponding gantry. The movement of the second cutting machine assembly 120 on the second gantry 122 can be the same or similar to the movement of the first cutting machine assembly 116 (or, more generally, the cutting machine 110) on the first gantry 118.

[0061] Thus, it should be understood that the first cutter assembly 116 may be moved along the longitudinal axis of the first stage 118 between various cutting positions, and the second cutter assembly 120 may be moved along the second stage 122 between various cutting positions.

[0062] In some examples, the first cutter assembly 116 includes a first cutting position at a first position 154 relative to the first gantry 118 and a second cutting position at a second position 156 relative to the first gantry 118. In some embodiments, the "first" cutting position 154 and the "second" cutting position 156 need not be fixed and may vary based on implementation and design requirements for a particular cutting pattern.

[0063] In some examples, the second cutter assembly 120 includes a first cutting position at a first position 158 relative to the second stage 122 and a second cutting position at a second position 160 relative to the second stage 122. In some examples, the first cutting position 158 and the second cutting position 160 need not be fixed and may vary based on implementation and design requirements for a particular cutting pattern.

[0064] In some examples, the first cutting position 154 of the first cutter assembly 116 is substantially forward of the first cutting position 158 of the second cutter assembly 120. In some examples, the x-coordinate of the first cutting position 154 of the first cutter assembly 116 is the same as the x-coordinate of the first cutting position 158 of the second cutter assembly 120. However, it should be noted that the cutters on the first cutter assembly 116 can be offset in the x-direction relative to the cutters on the second cutter assembly 120 to provide groove spacing.

[0065] In some examples, the second cutting position 156 of the first cutter assembly 116 is substantially forward of the second cutting position 160 of the second cutter assembly 120. In some examples, the x-coordinate of the second cutting position 160 of the first cutter assembly 116 is the same as the x-coordinate of the second cutting position of the second cutter assembly 120. However, it should be noted that the cutters on the first cutter assembly 116 can be offset in the x-direction relative to the cutters on the second cutter assembly 120 to provide slot spacing.

[0066] In the example, the cutting machine 110 includes a plurality of cutters. More specifically, Figure 3 In some examples, each cutter assembly 116 and 120 includes a plurality of cutters. In some examples, each cutter assembly 116, 120 includes a plurality of cutter units or modules. In some examples, each cutter unit includes a respective cutter.

[0067] For example, the first cutter assembly 116 includes cutter units 124, 126, 128, and 130. In this example, cutter units 124 and 126 are located on the front side of the gantry 118 (facing the work table 112), while cutter units 128 and 130 are located on the opposite side or rear side of the gantry 118 (facing away from the work table 112). Cutter 132 is mounted on cutter unit 124, and cutter 134 is mounted on cutter unit 126, etc. The other cutter units have cutters attached thereto in the same or similar manner.

[0068] In some examples, the position of each of the plurality of cutters can be individually adjusted in the x-direction. For example, the cutter 132 can be reciprocated back and forth in the x-direction, and the cutter 134 can be reciprocated back and forth in the x-direction.

[0069] In some examples, the motion of each of the plurality of cutters 132, 134 is controlled by a corresponding servo motor so that the position of the cutters can be individually adjusted in the x-direction. For example, servo motor 136 can control the x-direction motion of cutter 132, while servo motor 138 can control the x-direction motion of cutter 134. The servo motors enable fine and accurate motion control of the cutters in the x-direction.

[0070] In some examples, the position of each of the plurality of cutters can be individually adjusted in the z direction. For example, the cutter 132 can be reciprocated back and forth or up and down in the z direction, and the cutter 134 can be reciprocated back and forth or up and down in the z direction.

[0071] In some examples, each of the plurality of cutters includes a corresponding servo motor that enables the position of the cutter to be individually adjusted in the z-direction. For example, servo motor 140 can control the z-direction movement of cutter 132, and servo motor 142 can control the z-direction movement of cutter 134. The servo motors enable fine and accurate control of the cutter's motion in the z-direction.

[0072] The same or similar concepts as those applicable to cutter units 124 and 126 apply to cutter units 128 and 130 .

[0073] Thus, in this example, the cutter assembly 116 includes four cutter units 124, 126, 128, and 130, each having a respective cutter whose motion can be independently controlled in the x- and y-directions.

[0074] Concepts that are the same or similar to those that apply to the cutter assembly 116 apply to the cutter assembly 120. In summary, the cutter assembly 120 may include four cutting units 144, 146, 148, and 150. Each of the cutting units 144 to 148 may include a respective cutter that is controllable in the x-direction by a respective servo motor and in the z-direction by a respective servo motor.

[0075] Thus, in summary, in one example, the apparatus 102 includes eight cutter units 124, 126, 128, 130, 144, 146, 148, and 150, each having a corresponding cutter, the motion of each cutter being individually controllable in the x-direction and the z-direction.

[0076] In an example, at least one work table 112 for supporting a workpiece includes a first work table 112 and a second work table 113. The first work table 112 has a home position or rest position 111, and the second work table 113 has a home position or rest position 115. In some examples, the y-coordinate of the rest position 111 of the first work table 112 is the same as the y-coordinate of the rest position 115 of the second work table 113. The rest position 111 of the first work table 112 and the rest position 115 of the second work table 113 are positioned to be easily accessible to the operator 101, for example, so that the operator can easily place and remove workpieces on the first work table 112 and the second work table 113, respectively. In some examples, the rest position 111 of the first work table 112 is adjacent to the rest position 115 of the second work table 113 in the x-direction.

[0077] In some examples, the first worktable 112 is configured to support the first workpiece 104, and the second worktable 113 is configured to support the second workpiece 107. This means that the first workpiece 104 and the second workpiece 107 can be processed in parallel or with at least partial temporal overlap. In other words, the apparatus 102 including the first worktable 112 and the second worktable 113 can be considered a "swing-type" machine.

[0078] Therefore, in some examples, the at least one table 112 for supporting workpieces can be considered to include a first table 112 for supporting the first workpiece 104 and a second table 113 for supporting the second workpiece 107. In an example, the first table 112 is configured to reciprocate back and forth in the y-direction, such that the first table 112 can be selectively moved to a first cutting position of the first cutter assembly 116 or a first cutting position of the second cutter assembly 120. The second table 113 is configured to reciprocate back and forth along the y-direction, such that the second table 113 can be selectively moved to a second cutting position of the first cutter assembly 116 or a second cutting position of the second cutter assembly 120.

[0079] In the example, the first workbench 112 includes a positioning device schematically shown at 117, and the second workbench 113 includes a positioning device schematically shown at 119. The positioning devices 117 and 119 provide guidance to the operator 101 regarding the positioning position of the corresponding workpiece on the workbench. For example, each positioning device 117, 119 may include one or more rails or protrusions protruding from the workbench, and the operator 101 can push the corners or sides of the workpiece against the rails or protrusions. Additionally or alternatively, the positioning devices 117, 119 may include markings on the workbench 112, 113, such as one or more indicator lines. This enables the positioning of the workpiece to be accurately framed or referenced so that it can be correctly aligned with the cutting machine 110 later.

[0080] In some examples, the rack and pinion arrangement 162 enables reciprocating motion of the first table 112. In some examples, the rack and pinion arrangement 164 enables reciprocating motion of the second table 114.

[0081] In some examples, at least one of the workstations 112 (e.g., the first workstation 112 and / or the second workstation 113) includes a holding device for securely holding a workpiece to the respective workstation. For example, the holding device may include a vacuum or suction system for securely drawing the workpiece to the respective workstation. Alternatively, the holding device may include a clamp or the like for securing the perimeter of the workpiece. The holding device may be configured to securely hold the workpiece to the workstation at least while the cutting machine 110 is cutting a groove in the workpiece.

[0082] According to an example, the apparatus 102 includes a conveyor system, generally shown at 166. The conveyor system 166 includes a first conveyor portion 168 for conveying workpieces to an entrance area 170 of the apparatus 102. The entrance area 170 may be proximal to the work table 112. The conveyor system 166 includes a second conveyor portion 172 for conveying the workpieces out of the apparatus 102 after cutting by the cutting machine 110.

[0083] For further understanding, we will now refer to Figure 1 and Figure 2 An exemplary method of cutting multiple slots in two workpieces is described.For the purposes of this example, it will be assumed that the apparatus 102 has been provided with the necessary numerical data defining the slot cutting pattern for each workpiece.

[0084] At least one of the workpieces is fed to the apparatus 102 along the first conveyor portion 168 of the conveyor 166. In this machining example, the operator 101 feeds and places the second workpiece 107 on the second worktable 113. In some examples, a support plate 123 is provided that can move up and down parallel to the z-axis and can support the workpiece. The workpiece can then slide off the support plate 123 onto the second worktable 113, reducing the lifting load on the operator 101. In some examples, two such support plates are provided, one for each worktable 112, 113. The operator 101 can then initiate the slot cutting operation on the second workpiece 107, for example, via the user interface 174. Alternatively, the process can be initiated automatically, for example, in response to the controller 106 determining that the workpiece 107 is placed on the second worktable 113. For safety reasons, in some examples, the initiation of the cutting operation is a two-handed operation for the operator 101 to ensure that the operator cannot insert their hands into the cutting machine during the slot cutting process. The cutting machine is then positioned appropriately. For example, depending on need, cutter assembly 116 moves to a position such as position 156 or a similar position, and cutter assembly 120 moves to a position such as position 160 or a similar position. During the slot cutting operation, as the cutters are activated, table 113 (with workpiece 107 thereon) moves in the y-direction and away from rest position 115 past cutter assemblies 116 and 120 to cut a slot in workpiece 107. In some examples, the cutter assemblies are activated sequentially, such that once cutter assembly 116 has completed its slot cutting operation, cutter assembly 120 is activated (or vice versa, in the opposite direction). Once the table has moved past cutter assemblies 116 and 120, the positions of cutter assemblies 116 and 120 (and / or the positions of the cutters on the cutter assemblies) can be changed or adjusted. This position adjustment can be made in one or both of the x-axis and z-axis directions. In some examples, this position change can be relatively small. Then, once the cutters on the cutter assemblies 116 and 120 are activated or reactivated (together or sequentially), the table 113 moves in the y-direction and toward the rest position 115. Thus, it can be considered that there are two "processes" of cutting, a first process in which the table 113 moves away from the rest position 115, and a second process in which the table 113 moves back to the rest position 115.

[0085] The processing of the first workpiece 104 on the first workstation 112 can be the same or similar to the processing described with respect to the second workpiece 107 on the second workstation 113. In some examples, depending on how far along the second workstation 113 is in its processing, the first workstation 112 can wait in an "exit" or rest position 111. The operator 101 feeds and places the first workpiece 104 on the first workstation 112. In some examples, this can occur while the slot cutting operation is being performed on the second workpiece 107. The operator 101 can then initiate the slot cutting operation on the first workpiece 104, for example, via the user interface 174, or the process can begin automatically, for example, in response to the controller 106 determining that the first workpiece 104 is being placed on the first workstation 112. The cutter is then appropriately positioned. For example, the cutter assembly 116 moves to position 154 or the like, and the cutter assembly 120 moves to position 158 or the like. During the slot cutting operation, as the cutters are activated, the first table 112 is moved in the y-direction past the cutter assembly 116 and 120, away from the rest position 111, to cut the slot in the first workpiece 104. Once the table has moved past the cutter assemblies 116 and 120, the positions of the cutter assemblies 116 and 120 (and / or the positions of the cutters on the cutter assembly) can be changed or adjusted. In some examples, this position change can be minimal. Then, once the cutters on the cutter assemblies 116 and 120 are activated or reactivated (either together or sequentially), the first table 112 is subsequently moved in the y-direction toward the rest position 111. Thus, it can be considered that there are two "passes" of cutting: a first pass when the first table 112 moves away from the rest position 111, and a second pass when the table 112 moves back to the rest position 111.

[0086] In other words, for a groove cutting operation performed on one or both of a first workpiece and a second workpiece, it can be considered that the device is configured to cut a first group of grooves in a first process in which the workpiece passes through the first cutting machine and the second cutting machine, and after changing the position of the first cutting machine and the second cutting machine and / or changing the position of at least one cutter in the first cutting machine and the second cutting machine, cut a second group of grooves in a second process in which the workpiece passes through the first cutting machine and the second cutting machine in a direction opposite to the first process.

[0087] The completed slot cut pattern of the second workpiece 107 is schematically shown at 176. When the slot cutting operation of the second workpiece 107 is completed according to the predetermined slot cut pattern and the second work table 113 returns to its rest position 115, the second workpiece 107 with the completed slot cut pattern 176 can then be placed on the second conveyor section 172 for transport away from the apparatus 102.

[0088] At this point, a third workpiece (not shown) can be placed on the now vacant second worktable 113 to have a slot cut thereon.

[0089] Similarly, after the predetermined slot cutting pattern has been cut on the first workpiece 104 on the first worktable 112, the first worktable 112 returns to its rest position 111, enabling the operator 101 to remove the first workpiece 104 from the first worktable 112 and place it on the second conveyor section 172 for removal from the apparatus 102.

[0090] The process can be carried out in a continuous or ongoing manner.

[0091] It will of course be appreciated that the process has been described by way of example and that the order of certain steps can be varied. For example, the slot cutting pattern can first be implemented on the first workpiece 104 on the first worktable 112, and then implemented on the second workpiece 107 on the second worktable 113 in the same or similar manner as described above. It will therefore be appreciated that the terms “first” and “second” in relation to the worktables 112, 113 and workpieces 104, 107 are to assist in distinguishing the various worktables and workpieces for the purposes of clarity and are not necessarily intended to imply a certain order of the process.

[0092] Thus, in some examples, it can be considered that (during operation) there is always one worktable within the machine processing a workpiece, while the other worktable is in an “exit” or rest position.

[0093] In some examples, when one of the worktables is in its rest position, the support plate of the other worktable is moved upwardly so that the faceplate can be slid thereon. For example, when the first worktable 112 is in the rest position 111, the support plate 123 is in its upward position, as shown. Figure 1

[0094] In some examples, it can be considered that there is a safety zone, which can comprise the area outside the cutting area when the worktables 104, 113 are in their rest positions 111, 115. In some examples, a detector, such as a light beam, can be used to sense when the worktable is in the safety zone.

[0095] By way of example and with reference to Figure 1 and Figure 2 ​When the work table 104 is in the withdrawn or rest position 111 (i.e., within the safety zone) and the support plate 123 is in the raised or activated position, the safety zone is disabled. In this situation, the work table 113 cannot be moved to its withdrawn or rest position 115, even after a cut has been completed. If this is the case, the work table 113 will wait in its operating position away from the rest position 115 until the operator 101 activates the next cutting operation. The safety zone is then reactivated.

[0096] Now refer to Figures 4 to 6 Describing the second embodiment, Figures 4 to 6 An alternative arrangement of the device is shown. Figures 4 to 6 In, with Figures 1 to 3 Features corresponding or at least closely corresponding are given like reference numerals outside the 200 series.

[0097] As explained in more detail below, the difference between the first and second embodiments is that, in the second embodiment, the angular position of the cutter can be varied, thereby enabling the cutting of grooves extending diagonally across the workpiece. For example, the cutter can be moved or pulled across the workpiece at an angle to the y-axis. Alternatively, the cutter can be positioned at an angle and then remain stationary while the worktable moves past the cutter.

[0098] like Figure 4 and Figure 5 As shown, the apparatus 202 includes a first gantry 218 and a second gantry 222. The first gantry 218 and the second gantry 222 support a third gantry 280. In some examples, the third gantry 280 is suspended from the first gantry 218 and the second gantry 222. An operator is schematically shown at 201.

[0099] The cutter 210 is supported on a third gantry 280. In some examples, the cutter 280 can be the same as or similar to the first cutter assembly 116 described with respect to the first embodiment.

[0100] The third stage 280 includes a first attachment 288 for attaching the third stage 280 to the first stage 218 and a second attachment 290 for attaching the third stage 280 to the second stage 222. In some examples, the first attachment 288 and the second attachment 290 include a sliding carriage or a sliding bracket so that the third stage 280 can be slidably mounted to the first stage 218 and the second stage 222. Thus, the first end 279 of the third stage 280 can slide along the first stage 218, and the second end 281 of the third stage 280 can slide along the second stage 222.

[0101] In some examples, a rotation mechanism 292 is attached to the third gantry 280. In some examples, the rotation mechanism includes a triangular frame 294 attached to the second gantry 222. The triangular frame 294 is also attached to a protrusion 280 extending from the third gantry 280. In some examples, the protrusion 280 is mounted in the middle or approximately in the middle of the span of the third gantry 280. Thus, the protrusion 280 serves as the center of rotation or pivot point 283 for the third gantry 280.

[0102] According to some examples, the angle α of the third stage 280 relative to the y-axis is adjustable to enable cutting of multiple grooves on the surface of the workpiece at an angle to the y-axis.

[0103] According to some examples, the third gantry 280 can rotate between a range of angles relative to the y-axis about the pivot point 283. According to some examples, the range of angles includes a range between +60 degrees and -60 degrees. According to some examples, the range of angles includes a range between +45 degrees and -45 degrees.

[0104] According to some examples, the cutter 210 can reciprocate back and forth along the third gantry 280, for example on a carriage 211. In some examples, the carriage 211 is engaged with the third gantry 280 via a rack and pinion system, shown schematically at 221.

[0105] In the illustrated example, apparatus 202 includes a first worktable 212 and a second worktable 213. These can function in the same or similar manner as worktables 112 and 113 described with respect to the first embodiment, and therefore, for the sake of brevity, will not be explained in detail. However, for the sake of completeness, it should be noted that first and second worktables 212 and 213 can be driven toward and away from cutting machine 210 to implement the swinging operation described with respect to the first embodiment, thereby enabling multiple workpieces to be processed in parallel or in at least partially overlapping fashion. For example, first and second worktables 212 and 213 can be driven back and forth in the y-direction.

[0106] Similarly, the apparatus 202 includes a conveyor system 266 that includes a first conveyor portion 268 for conveying workpieces to an entrance area 270 of the apparatus 202. The entrance area 270 may be proximal to the work table 212. The conveyor system 266 includes a second conveyor portion 272 for conveying workpieces away from the apparatus 202 after cutting by the cutting machine 210.

[0107] The projector 296 is mounted on the track 295 so that the projector can reciprocate back and forth along the track 295 in the x-direction, for example, via a rack and pinion system. The projector 296 can project information such as a part number onto the workpiece. This can help the operator 201 identify the workpiece and / or can help the operator 201 cross-check information on the user interface 274. The projector 296 can also be incorporated into Figures 1 to 3 In the first embodiment shown.

[0108] A frame 297 for the device may also be provided. The frame 297 may, for example, support a cover or housing.

[0109] Figure 7 Shown is a housing 183. Although for Figures 1 to 3 The system 100 is shown and discussed primarily, but it should be understood that the housing 183 can also be used with Figures 4 to 6 System 200. Housing 183 is used to house the majority of apparatus 102. Specifically, housing 183 houses cutting machine 110. In some examples, access to the housing is restricted to authorized personnel, for example, via a lockable door or hatch. Furthermore, housing 183 is used to contain dust and particles generated by the cutting process. In some examples, an extraction system 185 is provided to extract dust and particles from housing 183.

[0110] The apparatuses 102 and 202 of the systems 100 and 200 are configured to cut slot patterns in workpieces of various types, materials, shapes, and sizes.

[0111] For example, the workpiece can include a foam workpiece. The foam workpiece can include a polymer foam. In some examples, the foam workpiece is a polyethylene terephthalate (PET) foam workpiece.

[0112] In other examples, the workpiece may comprise a wood material. For example, the workpiece may comprise balsa wood.

[0113] The shape of the workpiece is not limited. In some examples, the workpiece is rectangular. In some examples, the workpiece is square. In some examples, the workpiece is provided in sheet form. In some examples, the maximum sheet size is or is approximately 1.3 m x 1.4 m. This may be the case when two work tables are used in an oscillating manner as described above. In some examples, the maximum sheet size is or is approximately 1.3 m x 2.8 m. This may be the case when only one work table is used in a non-oscillating manner.

[0114] In some examples, the thickness of the workpiece varies between 10 mm or about 10 mm and 200 mm or about 200 mm. In some examples, the thickness of the workpiece varies between 10 mm or about 10 mm and 80 mm or about 80 mm. In some examples, the maximum thickness of the workpiece is 80 mm.

[0115] The density of the workpiece can vary. For example, the density can be 50 kg / m 3 (or about 50kg / m 3 ) and 300kg / m 3 (or about 300kg / m 3 In some instances, the density may be between 100 kg / m 3 (or about 100kg / m 3 ) and 275kg / m 3 (or about 275kg / m 3 ) varies between.

[0116] In some examples, at least one of the top or bottom surfaces of the workpiece is flat or planar. In some examples, both the top and bottom surfaces of the workpiece are planar. In some examples, at least one of the top or bottom surfaces is non-planar. In some examples, both the top and bottom surfaces of the workpiece are non-planar. The non-planar surface can, for example, be corrugated or wavy, or have a sawtooth profile.

[0117] It should be understood that the present disclosure described herein is capable of cutting a variety of groove cutting patterns on a workpiece surface. In one example, one or more of the following parameters can be controlled: groove depth; spacing between adjacent grooves; groove length; and the angle of the groove across the workpiece. Furthermore, by computer-controlling movable or adjustable components such as the table and cutter, the apparatus can rapidly switch between different groove pattern configurations. When switching between different groove patterns, the apparatus does not necessarily require manual intervention (such as manual adjustment of the cutter by an operator).

[0118] Compared to conventional slot cutting systems, the present disclosure can increase workpiece throughput. When using two (or more) worktables and an "oscillating" motion (as described above), downtime can be zero or near zero. For example, while one workpiece is being slotted, the next workpiece can be loaded, and so on.

[0119] For example, using the present disclosure, it was found that at a density of 115 kg / m 3 It takes 17.5 seconds to cut 8 grooves in a foam workpiece with a thickness of 30 mm. It is also found that 3 It takes 25.5 seconds to cut 8 grooves on a foam workpiece with a thickness of 50 mm.

[0120] In a comparative example, a complete set of core material panels (653 panels) for wind turbine blades was slotted. Using a conventional CNC production machine with a single saw blade, this took 14.5 hours. Using the slotting machine according to the present disclosure, this time was reduced to 4.2 hours.

[0121] According to some examples, from Figure 1 The computing device schematically shown at 300 receives numerical data defining a cutting pattern. The computing device 300 is arranged to communicate with the device 102 or 202. More particularly, the computing device 300 is arranged to communicate with the controller 106 or 206. The computing device 300 can be located on or near the device 102 or 202. Alternatively, the computing device 300 can be located remotely from the device 102 or 202. The computing device 300 carries a software platform that enables one or more slot cutting patterns to be designed for one or more corresponding workpieces. In some examples, an operator or engineer can manually design a slot cutting pattern to be cut into one or more workpieces via the software platform. In some examples, the software platform can calculate the slot cutting pattern based on one or more input parameters. For example, the input parameters for a wind turbine core supporting material or workpiece can include one or more of the following: geometric fit; blade weight; resin absorption; manufacturing cost; panel weight; panel permeability; mechanical properties. The software can design an optimal slot cutting pattern based on these one or more input parameters. An example of such a software platform is Gurit ® OptiCore TM However, having generated the slot cutting pattern, the computing device 300 generates numerical data defining the cutting pattern and sends the numerical data to the controller 106 or 206 .

[0122] It should be understood that the detailed description is exemplary and that other embodiments are possible. For example, unless otherwise indicated, Figures 1 to 3 and Figure 7 One or more features of the embodiments may be combined with Figures 4 to 6 The scope of the present disclosure is not limited by the foregoing description, but is defined by the appended claims.

Claims

1. An apparatus for cutting a plurality of grooves in a workpiece, the apparatus being computer numerically controlled and configured to cut the plurality of grooves according to information defining a cutting pattern, characterized in that The device comprises: a controller for receiving information including numerical data defining a cutting pattern for a workpiece; at least one work table for supporting a first surface of a corresponding workpiece; and a cutting machine comprising a plurality of cutters arranged spaced apart from the at least one work table and configured to cut the plurality of grooves in a second surface of the workpiece opposite the first surface when the workpiece is supported on the at least one work table, the plurality of grooves conforming to a cutting pattern defined for the workpiece, wherein each cutter is configured to cut a respective groove in the second surface, and the plurality of cutters are controlled by the controller to cut the plurality of grooves in an xyz coordinate system, wherein an xy plane is parallel to a surface of the at least one work table, and a z axis is orthogonal to the xy plane; wherein the cutting machine is configured such that the position of at least one cutter among the plurality of cutters in a direction parallel to the x-axis can be controlled by the controller relative to the position of another cutter among the plurality of cutters in a direction parallel to the x-axis, so that the spacing between at least two adjacent grooves among the plurality of grooves can be controlled; wherein the cutting machine is configured such that the position of the at least one cutter among the plurality of cutters in a direction parallel to the z-axis can be controlled by the controller so as to control the depth of at least one groove among the plurality of grooves; And at least one of the cutting machine and the at least one workbench is capable of moving relative to the other of the cutting machine and the at least one workbench in the xy plane or a plane parallel to the xy plane and in a direction parallel to the y axis or in a direction angled to the y axis, for cutting the multiple grooves on the second surface of the workpiece.

2. The device according to claim 1, wherein The spacing between the at least two adjacent grooves can vary between 10 mm and 300 mm.

3. The device according to claim 1, wherein The depth of the at least one groove can vary between 1 mm and 100 mm.

4. The device according to any one of claims 1 to 3, wherein: The position of each of the plurality of cutters is individually adjustable in a direction parallel to the x-axis.

5. The device according to claim 4, wherein Each of the plurality of cutters comprises a respective first servo motor for enabling individual adjustment of the position in a direction parallel to the x-axis.

6. The device according to any one of claims 1 to 3, wherein: The position of each of the plurality of cutters is individually adjustable in a direction parallel to the z-axis.

7. The apparatus according to claim 6, wherein Each of the plurality of cutters comprises a respective second servo motor for enabling individual adjustment of the position in a direction parallel to the z-axis.

8. The device according to any one of claims 1 to 3, wherein: The cutting machine and the at least one work table are configured such that when at least one of the cutting machine and the at least one work table moves relative to each other to cut the plurality of grooves on the second surface of the workpiece, (i) the cutting machine remains stationary while the at least one work table moves; (ii) the at least one work table remains stationary while the cutting machine moves; or (iii) both the at least one work table and the cutting machine move.

9. The device according to any one of claims 1 to 3, wherein: The apparatus comprises at least one stage for supporting the cutting machine.

10. The apparatus according to claim 9, wherein The at least one stage extends in a longitudinal direction parallel to the x-axis, and the cutting machine is configured to move back and forth along the longitudinal axis of the stage.

11. The apparatus according to claim 9, wherein The cutting machine includes a first cutting machine assembly and a second cutting machine assembly, the first cutting machine assembly is mounted on a first stage, the second cutting machine assembly is mounted on a second stage, each of the first stage and the second stage extends along a longitudinal direction parallel to the x-axis, the second stage is mounted behind the first stage along the y-direction, the first cutting machine assembly is configured to move back and forth between at least a first cutting position and a second cutting position of the first cutting machine assembly along the longitudinal direction of the first stage, and the second cutting machine assembly is capable of moving back and forth between at least a first cutting position and a second cutting position of the second cutting machine assembly along the longitudinal direction of the second stage.

12. The apparatus according to claim 11, wherein The at least one workbench for supporting the workpiece includes a first workbench for supporting the first workpiece and a second workbench for supporting the second workpiece, wherein the first workbench is configured to reciprocate back and forth along the y direction so that the first workbench can be selectively moved to the first cutting position of the first cutting machine assembly or the first cutting position of the second cutting machine assembly, and the second workbench is configured to reciprocate back and forth in the y direction so that the second workbench can be selectively moved to the second cutting position of the first cutting machine assembly or the second cutting position of the second cutting machine assembly.

13. The apparatus according to claim 11, wherein The device is configured to cut a first group of grooves among the multiple grooves in a first process of the corresponding workpiece passing through the first cutting machine and the second cutting machine, and after changing the positions of the first cutting machine and the second cutting machine and / or after changing the position of at least one cutter of the first cutting machine and the second cutting machine, cut a second group of grooves among the multiple grooves in a second process of the corresponding workpiece passing through the first cutting machine and the second cutting machine in a direction opposite to the first process.

14. The apparatus according to claim 9, wherein The angle of the stage relative to the y-axis is adjustable so that the plurality of grooves can be cut on the second surface of the workpiece at an angle to the y-axis.

15. The apparatus according to claim 14, wherein The stage is capable of rotating about a pivot point between a range of angles relative to the y-axis.

16. The apparatus according to claim 15, wherein The angle range includes a range between +60 degrees and -60 degrees.

17. The apparatus according to any one of claims 1 to 3, wherein: The apparatus comprises a conveyor system having a first conveyor section for conveying workpieces to an entrance area of ​​the apparatus before being cut by the cutting machine and a second conveyor section for conveying workpieces away from the apparatus after being cut by the cutting machine.

18. The apparatus according to any one of claims 1 to 3, wherein: The at least one workbench includes an adsorption table for firmly holding the workpiece on the at least one workbench.

19. The apparatus according to any one of claims 1 to 3, wherein: The plurality of cutters includes two or more cutters.

20. The apparatus according to any one of claims 1 to 3, wherein One or more of the cutters may include a saw blade.

21. The apparatus according to any one of claims 1 to 3, wherein One or more of the cutters include a hot wire cutter; or a laser cutter; or a milling head.

22. The apparatus according to any one of claims 1 to 3, wherein: The cutting machine is configured to cut a slot in a foam workpiece or a wooden workpiece.

23. The apparatus according to any one of claims 1 to 3, wherein The device comprises a user interface for enabling an operator to control one or more parameters of the device and / or for displaying information to the operator.

24. The apparatus according to any one of claims 1 to 3, wherein The device is in communication with a computing device, and the device is configured to receive numerical data defining a cutting pattern from the computing device.

25. The apparatus according to any one of claims 1 to 3, wherein The apparatus comprises a housing, and at least the cutting machine is located within the housing, and the housing comprises a ventilation system for extracting dust or particles from within the housing.

26. The apparatus of claim 12, wherein: The device is configured to cut a first group of grooves among the multiple grooves in a first process of the corresponding workpiece passing through the first cutting machine and the second cutting machine, and after changing the positions of the first cutting machine and the second cutting machine and / or after changing the position of at least one cutter of the first cutting machine and the second cutting machine, cut a second group of grooves among the multiple grooves in a second process of the corresponding workpiece passing through the first cutting machine and the second cutting machine in a direction opposite to the first process.

27. The apparatus of claim 16, wherein: The angle range includes a range between +45 degrees and -45 degrees.

28. The apparatus of claim 19, wherein The plurality of cutters includes eight cutters.

29. The apparatus of claim 22, wherein: The foam workpiece comprises a polymer foam workpiece, and the wooden workpiece comprises a balsa wood workpiece.

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