Plate cutting device

Abstract

To provide a plate material cutting device which can suppress occurrence of burrs or chipping of a cut part while suppressing deterioration in working efficiency.SOLUTION: A plate material cutting device 100 includes: a first circular saw 110 and a second circular saw 120 below a workpiece holding tool 101 for holding a material 90 to be cut as a printed board; and a third circular saw 130 and a fourth circular saw 140 above the workpiece holding tool 101. The first circular saw 110 to the fourth circular saw 140 are supported by conveyance bases 151 and 161 reciprocated and displaced by feeding mechanisms 155 and 165 through circular saw driving mechanisms 111, 121, 131 and 141. The plate material cutting device 100 cuts a part of a working line WL from one end of the material 90 to be cut using the first circular saw 110 and the third circular saw 130 by up-cutting and cuts the part of the working line WL, and cuts a residue of the working line WL including the other end of the material 90 to be cut using the second circular saw 120 and the fourth circular saw 140 rotated reversely relative to the first circular saw 110 and the third circular saw 130 by up-cutting.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a plate cutting device for linearly cutting a plate-shaped workpiece such as a printed circuit board. [Background technology]

[0002] Conventionally, printed circuit boards incorporated into electronic devices are manufactured by forming multiple electronic circuits constituting the printed circuit board on a single large-sized board larger than the printed circuit board and then dividing the board into individual electronic circuits. In this case, the large-sized board is divided directly by a circular saw or by forming V-shaped dividing grooves and dividing it appropriately at the necessary timing. For example, Patent Document 1 listed below discloses a traveling circular saw in which two circular saws are arranged in a vertical line along the cutting direction, with the front circular saw cutting the workpiece with a down cut and the rear circular saw cutting the workpiece with an up cut, thereby preventing burrs or chips from occurring on the surface of the cut portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 3-295601

[0004] However, the traveling circular saw described in Patent Document 1 requires the front circular saw of the two circular saws in the traveling direction to specify and adjust the cutting depth for the hair cutting before cutting, which results in low work efficiency. In particular, when cutting thin plates with a thickness of 1 mm or less, the specifying and adjusting of the cutting depth for the hair cutting is extremely difficult. Summary of the Invention

[0005] The present invention has been made to address the above-mentioned problems, and its purpose is to provide a plate cutting device that can prevent burrs or chips from occurring in the cutting area while suppressing a decrease in work efficiency.

[0006] To achieve the above object, the present invention is characterized by comprising a first circular saw that cuts a processing line that extends linearly on one side of a plate-like workpiece, a second circular saw that cuts a processing line that extends linearly on one side of the workpiece, a first circular saw rotation means that rotates the first circular saw, a second circular saw rotation means that rotates the second circular saw in a direction opposite to the rotation drive direction of the first circular saw, a one-side circular saw feeding means that displaces the first circular saw and the second circular saw relatively in a direction along the processing line with respect to the workpiece, a one-side Z-direction displacement means that moves the first circular saw and the second circular saw toward or away from each other in a direction perpendicular to one side of the workpiece, and a control device that controls the operation of the first circular saw rotation means, the second circular saw rotation means, the one-side circular saw feeding means, and the one-side Z-direction displacement means. 、 a third circular saw arranged opposite to the first circular saw to cut a processing line extending linearly on one side of the workpiece opposite to the opposite side of the workpiece; a fourth circular saw arranged opposite to the second circular saw to cut a processing line extending linearly on the opposite side of the workpiece; a third circular saw rotation means for rotating the third circular saw; a fourth circular saw rotation means for rotating the fourth circular saw in a direction opposite to the rotation drive direction of the third circular saw; and an opposite side circular saw feed for relatively displacing the third circular saw and the fourth circular saw in a direction along the processing line with respect to the opposite side of the workpiece. and an opposite surface side Z direction displacement means for moving the third and fourth circular saws toward or away from each other in a direction perpendicular to the opposite surface of the workpiece, and the control device uses one of the first and second circular saws to cut from one end of one side of the workpiece with up-cutting to cut a part of the processing line, and uses the other circular saw rotated in the opposite direction to the one circular saw to cut the remaining part of the processing line including the other end of the one side of the workpiece with up-cutting or down-cutting. andBy controlling the operation of the third circular saw rotation means, the fourth circular saw rotation means, the opposite surface side circular saw feeding means and the opposite surface side Z-direction displacement means, one of the third and fourth circular saws is used to cut from one end of the opposite surface of the workpiece using up-cutting, and the other circular saw, which is rotated in the opposite direction to the one circular saw that cuts the opposite surface, is used to cut the remaining part of the processing line, including the other end of the opposite surface of the workpiece, using up-cutting or down-cutting.

[0007] Note that a processing line that extends linearly relative to the plate surface of the workpiece includes a cutting line that completely cuts the plate surface, as well as a notch line that does not completely cut the plate surface but instead cuts a groove-like notch. Processing lines also include processing lines that extend continuously and processing lines that extend intermittently. Up-cutting is a cutting method in which the feed direction of the workpiece relative to the circular saw and the rotational drive direction of the circular saw at the part where the workpiece is cut are opposite to each other. Down-cutting is a cutting method in which the feed direction of the workpiece relative to the circular saw and the rotational drive direction of the circular saw at the part where the workpiece is cut are the same.

[0008] According to the features of the present invention configured in this manner, the plate cutting device uses one of the first and second circular saws to cut a part of the processing line of the cutting process performed on the workpiece using up-cutting, and the other circular saw to cut the remaining part of the processing line using up-cutting or down-cutting by rotating in the opposite direction, thereby preventing the occurrence of burrs or chips without the need for the hassle of hair-pulling process and preventing a decrease in work efficiency. Further, according to the present invention, The plate cutting device is equipped with a third circular saw and a fourth circular saw similar to the first circular saw and the second circular saw on one side of the plate surface of the workpiece as well as on the other side of the plate surface. Therefore, even if a malfunction occurs with the first circular saw or the second circular saw, cutting processing can be performed using the third circular saw and the fourth circular saw. In addition, cutting processing can be performed by cutting into both sides of the workpiece, and groove-shaped processing lines can also be cut on both sides of the workpiece simultaneously.

[0009] Another feature of the present invention is that in the plate cutting device, the control device does not perform cutting processing using one of the first circular saw and the second circular saw while the other circular saw is performing cutting processing.

[0010] According to another feature of the present invention configured in this manner, the plate cutting device does not perform cutting using one of the first and second circular saws while the other circular saw is performing cutting, thereby preventing a decrease in cutting accuracy due to mutual influence between cutting using the first circular saw and cutting using the second circular saw.

[0011] The traveling circular saw described in Patent Document 1 has a problem in that, since it switches to cutting using both or only one of the two circular saws midway through cutting using only one or both of the two circular saws, cutting accuracy can decrease when the switching occurs. In particular, when cutting thin plates with a thickness of 1 mm or less, relative runout can occur between the circular saw and the workpiece or the cutting depth can change when the switching of cutting methods occurs, resulting in a decrease in cutting accuracy.

[0012] However, according to the present invention, the plate cutting device does not perform cutting using one of the first and second circular saws while the other circular saw is performing cutting, thereby preventing a decrease in cutting accuracy due to switching between cutting processes.

[0013] Another feature of the present invention is that in the plate cutting device, the first circular saw and the second circular saw are each supported on a single conveying table and move integrally in a direction along the processing line, and the control device stops the rotation of one of the first circular saw and the second circular saw while driving the other circular saw to rotate.

[0014] According to another feature of the present invention configured in this manner, the plate cutting device stops the rotation of one of the first and second circular saws, each supported on a single conveying table, while rotating the other circular saw, thereby preventing cutting dust generated by the circular saw performing cutting work from being picked up and scattered by the rotation of the circular saw that is not performing cutting work.

[0015] Another feature of the present invention is that in the plate material cutting device, the first circular saw and the second circular saw are arranged in a vertical line along the processing line, and the control device cuts a part of the processing line and the remainder of the processing line using the rear circular saw of the first circular saw and the second circular saw that is located rearward in the feed direction.

[0016] According to another feature of the present invention configured in this manner, the plate material cutting device cuts part of the processing line and the remainder of the processing line using the rear circular saw located on the rear side in the feed direction of the first and second circular saws arranged in a vertical row along the processing line, thereby preventing cutting dust generated by the cutting process by the rear circular saw from adhering to the front circular saw located on the front side in the feed direction and causing dirt or adversely affecting the cutting accuracy.

[0017] Another feature of the present invention is that in the plate material cutting device, when the rear circular saw is cutting part of the processing line and the position of the front circular saw, which is located forward of the rear circular saw, exceeds the other end of one side of the workpiece, the control device interrupts the cutting by the rear circular saw and starts cutting the remainder of the processing line using the front circular saw.

[0018] According to another feature of the present invention configured in this manner, when the position of the front circular saw, which is located forward of the rear circular saw, passes the other end of one side of the workpiece, the plate cutting device interrupts cutting with the rear circular saw and starts cutting the remainder of the processing line using the front circular saw, so that the amount of movement of the rear circular saw and the front circular saw can be kept small and part of the processing line and the remaining part can be processed efficiently.

[0019] Another feature of the present invention is that in the plate material cutting device, the control device synchronizes cutting of one side of the workpiece using the first circular saw and the second circular saw with cutting of the opposite side of the workpiece using the third circular saw and the fourth circular saw.

[0020] According to another feature of the present invention configured in this manner, the plate cutting device synchronizes cutting of one side of the workpiece using the first and second circular saws with cutting of the opposite side of the workpiece using the third and fourth circular saws, thereby enabling efficient cutting or grooving of the workpiece.

[0021] In addition, the plate cutting device is A first circular saw for cutting a line extending linearly on one side of a plate-shaped workpiece, a second circular saw for cutting a line extending linearly on one side of the workpiece, a first circular saw rotation means for rotating the first circular saw, a second circular saw rotation means for rotating the second circular saw in a direction opposite to the rotation drive direction of the first circular saw, a one-side circular saw feeding means for relatively displacing the first circular saw and the second circular saw in a direction along the line of the workpiece, and a feed mechanism for moving the first circular saw and the second circular saw toward or away from each other in a direction perpendicular to one side of the workpiece. and a control device that controls the operation of the one-side Z-direction displacement means, the first circular saw rotation means, the second circular saw rotation means, the one-side circular saw feeding means, and the one-side Z-direction displacement means, and the control device uses one of the first and second circular saws to cut from one end of one side of the workpiece by up-cutting to cut a part of the processing line, and uses the other circular saw that rotates in the opposite direction to the one circular saw to cut the remaining part of the processing line including the other end of one side of the workpiece by up-cutting or down-cutting. This may be done.

[0022] According to this,In the plate cutting device, one of the first and second circular saws cuts part of the processing line of the cutting process performed on the workpiece using up-cutting, and the other circular saw cuts the remaining part of the processing line using up-cutting or down-cutting by rotating in the opposite direction, thereby preventing the occurrence of burrs or chips without the need for the hassle of hair-pulling processing and preventing a decrease in work efficiency. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is an explanatory diagram showing a schematic front view of the configuration of a main part of a plate material cutting device according to an embodiment of the present invention. [Figure 2] 2 is a block diagram of a control system for controlling the operation of the plate material cutting device shown in FIG. 1. FIG. [Figure 3] FIG. 3 is an explanatory view showing a state in which the second circular saw and the fourth circular saw of the plate material cutting device shown in FIG. 1 have reached the other end of the workpiece. [Figure 4] FIG. 4 is an explanatory diagram showing a state in which the second circular saw and the fourth circular saw in the plate material cutting device shown in FIG. 1 perform cutting work from the other end side to one end side of the workpiece. DETAILED DESCRIPTION OF THE INVENTION

[0024] An embodiment of a plate cutting device according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic front view of the configuration of the main parts of a plate cutting device 100 according to the present invention. FIG. 2 is a block diagram of a control system that controls the operation of the plate cutting device 100 shown in FIG. 1. Note that the drawings referred to in this specification are schematic, with some components exaggerated, to facilitate understanding of the present invention. Therefore, the dimensions and ratios between the components may differ.

[0025] This plate material cutting device 100 is a machine that cuts V-shaped processing lines WL along the X-axis direction in Fig. 1 at positions facing each other on a lower surface 91 and an upper surface 92 that constitute both sides of a workpiece 90 made of a printed circuit board. Note that in Fig. 1, the vertical direction in the figure is the Z-axis direction, the horizontal direction in the figure that is perpendicular to the Z-axis direction is the X-axis direction, and the direction perpendicular to the Z-axis direction and the X-axis direction is the Y-axis direction (the same applies to Figs. 3 and 4).

[0026] First, before describing the plate material cutting device 100 according to the present invention, we will describe the workpiece 90 that is the object to be machined by this plate material cutting device 100. This workpiece 90 is a large-sized printed circuit board on which multiple sets of electronic circuits are formed, which constitute a printed circuit board to be incorporated into electronic devices such as smartphones, and is formed in a rectangular shape in a plan view. In this case, the size of the workpiece 90 varies depending on the specifications of the electronic device, but the thickness is formed to be approximately 0.3 mm to 5 mm.

[0027] (Plate cutting equipment 100) The plate cutting device 100 is equipped with a workpiece holder 101. The workpiece holder 101 is a mechanical device for detachably holding a plate-shaped workpiece 90, and is formed in the shape of a flat plate extending in the horizontal direction. The workpiece holder 101 is fixedly supported on a support base (not shown) in the plate cutting device 100. The workpiece holder 101 is also formed with suction holes (not shown) that open to a flat holding surface 101a on which the workpiece 90 is placed and that suck the workpiece 90 by negative pressure, and with tool slits 102 that allow a first circular saw 110 and a second circular saw 120 (described later) to pass through to the workpiece 90.

[0028] In this case, countless suction holes are formed on the holding surface 101a of the workpiece holder 101, and are connected to a suction pump 103 for generating negative pressure. The tool slit 102 is formed as an elongated hole that penetrates the workpiece holder 101 and has a length longer than the processing line WL to be processed on the workpiece 90. The workpiece holder 101 is provided with a first circular saw 110 and a second circular saw 120 on the lower side, and a third circular saw 130 and a fourth circular saw 140 on the upper side.

[0029] The first to fourth circular saws 110 to 140 are tools for cutting a V-groove-shaped work line WL on the plate surface of the workpiece 90 held on the plate surface of the workpiece holder 101, and are configured with a plurality of cutting edges arranged in a circumferential direction and protruding from the outer periphery of a metal disk. In this embodiment, the first to fourth circular saws 110 to 140 are each configured as so-called tipped saws in which tips are brazed as cutting edges to the outer periphery of a metal disk-shaped core. Of course, the first to fourth circular saws 110 to 140 may have cores and cutting edges integrally formed from a single metal material.

[0030] Of the first to fourth circular saws 110 to 140, the first circular saw 110 and the second circular saw 120 are cutting tools that form a processed line WL on a lower surface 91, which is one surface of the workpiece 90, and are supported by circular saw drive mechanisms 111 and 121, respectively, below the workpiece holder 101. The third circular saw 130 and the fourth circular saw 140 are cutting tools that form a processed line WL on an upper surface 92, which is the other surface (the surface opposite to the one surface), of the workpiece 90, and are supported by circular saw drive mechanisms 131 and 141, respectively, above the workpiece holder 101. Because the circular saw drive mechanisms 111, 121, 131, and 141 have the same configuration, only the circular saw drive mechanism 111 will be described, and descriptions of the circular saw drive mechanisms 121, 131, and 141 will be omitted as appropriate.

[0031] The circular saw drive mechanism 111 is a mechanical device that detachably holds the first circular saw 110 and drives it to rotate and move it closer to or away from the underside 91 of the workpiece 90. The circular saw drive mechanism 111 is mainly composed of a movable arm 112, a bearing 113, a rotating shaft 113a, a pulley 113b, a drive belt 114, a bearing 115, a saw blade drive motor 116, a drive shaft 116a, a pulley 116b, and a Z-direction displacement device 117.

[0032] The movable arm 112 is a component for movably supporting the first circular saw 110 below the work holder 101, and is made of a metal material formed into a rod shape. More specifically, the movable arm 112 is provided with a bearing 113 in the center in the longitudinal direction, and the first circular saw 110 is detachably attached to one end of a rotating shaft 113a that is rotatably supported by this bearing 113.

[0033] In this case, the first circular saw 110 is attached to the rotary shaft 113a in an orientation that allows the first circular saw 110 to perform up-cut cutting on the workpiece 90 behind the second circular saw 120 when cutting the underside 91 of the workpiece 90. Up-cutting is a cutting technique in which the feed direction of the workpiece relative to the circular saw and the rotational drive direction of the circular saw at the part where the workpiece is cut are opposite to each other.

[0034] A pulley 113b is attached to the other end of the rotary shaft 113a, and is connected to a pulley 116b (described later) via a drive belt 114. The drive belt 114 is a ring-shaped belt-like component for transmitting the rotational drive force of the saw blade drive motor 116 to the rotary shaft 113a. One end of the movable arm 112 is rotatably supported by a bearing 115, and the other end is supported by a Z-direction displacement device 117.

[0035] The bearing 115 is a component that rotatably supports the movable arm 112 and also rotatably supports a drive shaft 116a extending from the saw blade drive motor 116, and is fixedly attached to the transport base 151. The saw blade drive motor 116 is a prime mover that drives the first circular saw 110 to rotate, and is also fixedly attached to the transport base 151.

[0036] A pulley 116b is attached to the tip end of a drive shaft 116a extending from the saw blade drive motor 116 while the drive shaft 116a is rotatably supported by a bearing 115, and the drive motor 116 is connected to a pulley 113b via the pulley 116b and the drive belt 114. The operation of the saw blade drive motor 116 is controlled by a control device 170, which will be described later. In other words, the saw blade drive motor 116 corresponds to the first circular saw rotation means according to the present invention.

[0037] The Z-direction displacement device 117 is a mechanical device for moving the first circular saw 110 toward or away from the underside 91 of the workpiece 90 held on the plate surface of the workpiece holder 101, and is composed of an air cylinder whose operation is controlled by the control device 170. The Z-direction displacement device 117 is rotatably attached to the underside of the conveying base 151 while passing through the conveying base 151, and the tip of the rod is rotatably connected to the other end of the movable arm 112.

[0038] As a result, when the rod of the Z-direction displacement device 117 extends, the other end of the movable arm 112 rises and the first circular saw 110 approaches the underside 91 of the workpiece 90, and when the rod of the Z-direction displacement device 117 contracts, the other end of the movable arm 112 descends and the first circular saw 110 moves away from the underside 91 of the workpiece 90. In other words, this Z-direction displacement device 117 corresponds to the one-side Z-direction displacement means according to the present invention.

[0039] The circular saw driving mechanisms 121, 131, and 141 have the same configuration as the circular saw driving mechanism 111. That is, the circular saw driving mechanism 121 is a mechanical device that rotates and moves the second circular saw 120 toward or away from the underside 91 of the workpiece 90 while detachably holding the second circular saw 120 at a position adjacent to the circular saw driving mechanism 111 in the processing direction of the processing line WL. Specifically, the circular saw drive mechanism 121 includes a movable arm 122, bearing 123, rotating shaft 123a, pulley 123b, drive belt 124, bearing 125, saw blade drive motor 126 (second circular saw rotation means), drive shaft 126a, pulley 126b and Z-direction displacement device 127 (one-sided Z-direction displacement means), which are configured similarly to the movable arm 112, bearing 113, rotating shaft 113a, pulley 113b, drive belt 114, bearing 115, saw blade drive motor 116, drive shaft 116a, pulley 116b and Z-direction displacement device 117 in the circular saw drive mechanism 111.

[0040] In this case, the second circular saw 120 is attached to the rotary shaft 123a in an orientation that allows the second circular saw 120 to perform up-cut cutting on the workpiece 90 behind the first circular saw 110 when cutting the underside 91 of the workpiece 90. That is, the second circular saw 120 is held by the circular saw drive mechanism 121 in a symmetrical orientation relative to the first circular saw 110. Furthermore, the components of the circular saw drive mechanism 121 are attached to the transport base 151 in an arrangement that is symmetrical relative to the circular saw drive mechanism 111. This allows the first circular saw 110 and the second circular saw 120 to be positioned close to each other.

[0041] In addition, the circular saw drive mechanism 131 is a mechanical device that rotates and drives the third circular saw 130 while removably holding it at a position opposite the circular saw drive mechanism 111 relative to the workpiece holder 101, and moves it closer to or away from the top surface 92 of the workpiece 90. Specifically, the circular saw drive mechanism 131 includes a movable arm 132, bearing 133, rotating shaft 133a, pulley 113b, drive belt 114, bearing 115, saw blade drive motor 116, drive shaft 116a, pulley 116b and Z-direction displacement device 137 (opposite side Z-direction displacement means), which are configured similarly to the movable arm 112, bearing 113, rotating shaft 113a, pulley 113b, drive belt 114, bearing 115, saw blade drive motor 116, drive shaft 116a, pulley 116b and Z-direction displacement device 117 in the circular saw drive mechanism 111.

[0042] In this case, the third circular saw 130 is attached to the rotary shaft 133a in an orientation that allows the third circular saw 130 to perform up-cut cutting on the workpiece 90 behind the fourth circular saw 140 when cutting the top surface 92 of the workpiece 90. In other words, the third circular saw 130 is held by the circular saw drive mechanism 131 in an orientation that is vertically symmetrical to the first circular saw 110. Furthermore, the components of the circular saw drive mechanism 131 are attached to the transport base 161 in an arrangement that is vertically symmetrical to the circular saw drive mechanism 111.

[0043] The circular saw driving mechanism 141 is a mechanical device that rotates and moves the fourth circular saw 140 toward or away from the top surface 92 of the workpiece 90 while detachably holding the fourth circular saw 140 at a position adjacent to the circular saw driving mechanism 111 in the processing direction of the processing line WL (a position opposite the circular saw driving mechanism 121 relative to the workpiece holder 101). Specifically, the circular saw drive mechanism 141 includes a movable arm 142, bearing 143, rotating shaft 143a, pulley 143b, drive belt 144, bearing 145, saw blade drive motor 146 (fourth circular saw rotation means), drive shaft 146a, pulley 146b and Z-direction displacement device 147 (opposite side Z-direction displacement means), which are configured similarly to the movable arm 112, bearing 113, rotating shaft 113a, pulley 113b, drive belt 114, bearing 115, saw blade drive motor 116, drive shaft 116a, pulley 116b and Z-direction displacement device 117 in the circular saw drive mechanism 111.

[0044] In this case, the fourth circular saw 140 is attached to the rotary shaft 143a in an orientation that allows the fourth circular saw 140 to perform up-cut cutting on the workpiece 90 behind the third circular saw 130 when cutting the top surface 92 of the workpiece 90. That is, the fourth circular saw 140 is held by the circular saw drive mechanism 141 in a symmetrical orientation relative to the third circular saw 130. Furthermore, the components of the circular saw drive mechanism 141 are attached to the conveyor base 161 in an arrangement that is symmetrical relative to the circular saw drive mechanism 131. This allows the third circular saw 130 and the fourth circular saw 140 to be positioned close to each other.

[0045] The transport base 151 is a component that supports the circular saw drive mechanism 111 and the circular saw drive mechanism 121 on the underside 91, which is one plate surface side, of the workpiece 90 held by the workpiece holder 101, and is configured by forming a metal material into a plate shape. In this embodiment, the transport base 151 supports the circular saw drive mechanism 111 and the circular saw drive mechanism 121 in a mounted state below the workpiece holder 101. In this case, the Z-direction displacement devices 117, 127 of the circular saw drive mechanism 111 and the circular saw drive mechanism 121 are attached to the underside of the transport base 151 with the rods of the air cylinders that constitute each Z-direction displacement device 117, 127 passing through through holes (not shown) formed in the plate surface of the transport base 151.

[0046] The transport base 151 is supported on a base support stand 152 in a state in which it can slide back and forth along the direction in which the finished wire WL is formed. In this case, two concave slide grooves (not shown) with a T-shaped cross section are formed on the underside of the transport base 151 along the direction in which the finished wire WL is formed, and slide rails 153 formed on the base support stand 152 are fitted into each of these slide grooves in a reciprocating sliding state. In addition, a feed block 158 constituting a feed mechanism 155 is attached to the underside of the transport base 151 between the two slide grooves.

[0047] The base support table 152 is a component that supports the transport base 151 in a state in which it can slide back and forth along the direction in which the processing line WL is formed, and is formed in the shape of a flat plate extending horizontally. This base support table 152 is fixedly supported on a support table (not shown) of the plate material cutting device 100. In addition, the base support table 152 has a slide rail 153 formed on the surface that supports the transport base 151, and a block penetration slit 154 through which the feed block 158 passes.

[0048] The slide rail 153 is a part that fits into a slide groove formed on the underside of the conveying base 151 to guide the conveying base 151 along the direction in which the processing line WL is formed, and is composed of two convex rails with a T-shaped cross section formed on the upper surface of the base support stand 152. In addition, the block through-slit 154 is formed in the shape of an elongated hole that penetrates the conveying base 151 with a length longer than the processing line WL to be processed on the workpiece 90. This conveying base 151 corresponds to the conveying table according to the present invention.

[0049] The feed mechanism 155 is a mechanical device for reciprocatingly displacing the transport base 151 along the direction in which the machining line WL is formed relative to the workpiece 90 held on the workpiece holder 101, and is mainly composed of a feed drive motor 156, a feed shaft 157, and a feed block 158. The feed drive motor 156 is an electric actuator whose operation is controlled by the control device 170. The feed drive motor 156 is attached to the underside of the base support stand 152.

[0050] The feed shaft 157 is a rod-shaped component with a male screw formed on the outer circumferential surface of the shaft body that is driven to rotate by the drive of the feed drive motor 156. This feed shaft 157 is disposed below the block through-hole 154 and extends along the block through-hole 154. The feed block 158 is a block-shaped component with a female screw formed on the inner circumferential surface of a through-hole that engages with the male screw formed on the feed shaft 157, and is attached to the underside of the conveying base 151.

[0051] As a result, the feed mechanism 155 rotates the feed shaft 157 by the rotational drive of the feed drive motor 156, thereby linearly displacing the conveying base 151, on which the feed block 158 is provided, back and forth along the axial direction of the feed shaft 157, i.e., along the direction in which the processing line WL is formed. This feed mechanism 155 corresponds to the single-side circular saw feed means according to the present invention.

[0052] Similar to the transport base 151, the transport base 161 (transport table) is a component that supports the circular saw drive mechanisms 131 and 141 on the top surface 92, which is the other plate surface side, of the workpiece 90 held by the workpiece holder 101, and is configured by forming a metal material into a plate shape. That is, the transport base 161 is configured similarly to the transport base 151. In this case, the transport base 161 supports the circular saw drive mechanisms 131 and 141 in a hanging state above the workpiece holder 101. In this case, the Z-direction displacement devices 137 and 147 of the circular saw drive mechanisms 131 and 141 are attached to the top surface of the transport base 161 with the rods of the air cylinders that constitute each Z-direction displacement device 137 and 147 passing through through holes (not shown) formed in the plate surface of the transport base 161.

[0053] The transport base 161 is supported on a base support stand 162 in a state in which it can slide back and forth along the direction in which the finished wire WL is formed. In this case, two concave slide grooves (not shown) with a T-shaped cross section are formed on the upper surface of the transport base 161 along the direction in which the finished wire WL is formed, and slide rails 163 formed on the base support stand 162 are fitted into each of these slide grooves in a reciprocating sliding state. In addition, a feed block 168 constituting a feed mechanism 165 is attached to the lower surface of the transport base 161 between the two slide grooves.

[0054] The base support table 162, like the base support table 152, is a component that supports the transport base 161 in a state where it can slide back and forth along the direction in which the processing line WL is formed, and is formed in the shape of a flat plate extending in the horizontal direction. This base support table 162 is fixedly supported on a support table (not shown) of the plate material cutting device 100. In addition, the base support table 162 has a slide rail 163 formed on the surface that supports the transport base 161, and a block penetration slit 164 through which the feed block 168 passes.

[0055] The slide rail 163 is a part that fits into a slide groove formed on the upper surface of the conveying base 161 to guide the conveying base 161 along the direction in which the processing line WL is formed, and is composed of two convex rails with a T-shaped cross section formed on the upper surface of the base support stand 162. In addition, the block through slit 164 is formed in the shape of an elongated hole that penetrates the conveying base 161 and has a length longer than the processing line WL to be processed into the workpiece 90.

[0056] The feed mechanism 165 is a mechanical device for reciprocatingly displacing the transport base 161 along the direction in which the processing line WL is formed relative to the workpiece 90 held on the workpiece holder 101, and is configured in the same manner as the feed mechanism 155. That is, the feed mechanism 165 is provided with a feed drive motor 166, a feed shaft 167, and a feed block 168 that are similar to the feed drive motor 156, the feed shaft 157, and the feed block 158 in the feed mechanism 155, and therefore a description thereof will be omitted.

[0057] The control device 170 is configured by a microcomputer including a CPU, ROM, RAM, etc., and comprehensively controls the overall operation of the plate cutting device 100, and executes a plate cutting program (not shown) stored in advance in a storage device to cut V-grooves on both sides of the workpiece 90. Specifically, the control device 170 controls the operation of the suction pump 103, saw blade drive motors 116, 126, 136, 146, Z-direction displacement devices 117, 127, 137, 147, and feed drive motors 156, 166.

[0058] The control device 170 is provided with an input device consisting of a group of switches that receive instructions from the operator and input them to the control device 170, and an operation panel 171 that is provided with indicator lamps and a liquid crystal display that display the operating status of the control device 170. The control device 170 also includes a power supply unit that receives power from an external power source and supplies power to each of the components that require power, such as the saw blade drive motors 116, 126, 136, 146, the Z-direction displacement devices 117, 127, 137, 147, and the feed drive motors 156, 166, as well as an exterior cover that encloses the entire plate cutting device 100, but these are not directly related to the present invention and therefore will not be described here.

[0059] (Operation of plate cutting device 100) Next, the operation of the plate material cutting device 100 configured as above will be described with reference to Figures 3 and 4. First, an operator who performs cutting processing of the processing line WL on the workpiece 90 using the plate material cutting device 100 starts up the control device 170 by turning on a power switch (not shown) of the plate material cutting device 100. As a result, the control device 170 starts operation by executing a control program stored in advance in a storage device such as a ROM, and goes into a standby state where it waits for instructions from the operator.

[0060] Next, the operator returns each of the first to fourth circular saws 110 to 140 to their origins. Specifically, the operator operates the operation panel 171 to instruct the control device 170 to return the first to fourth circular saws 110 to 140 to their origins. In this case, the positions to which the first to fourth circular saws 110 to 140 are returned to their origins are one end of the elongated tool slit 102. In this embodiment, the origin positions of the first to fourth circular saws 110 to 140 are the end (not shown) on the right side in the drawing of the elongated tool slit 102.

[0061] The control device 170 controls the operation of each of the Z-direction displacement devices 117, 127, 137, and 147 to displace the first circular saw 110 to the fourth circular saw 140 in a direction away from the holding surface 101a of the work holder 101, and then controls the operation of each of the feed drive motors 156 and 166 to position the conveying bases 151 and 161 at their respective origin positions.

[0062] Next, the worker holds the workpiece 90 on the work holder 101. Specifically, the worker places the workpiece 90 at a predetermined position on the holding surface 101a of the work holder 101, and then operates the operation panel 171 to activate the suction pump 103, thereby generating negative pressure on the holding surface 101a and holding the workpiece 90. In this case, the predetermined position is a position where the position where the processing line WL is formed on the plate surface of the workpiece 90 is on the displacement line of the first circular saw 110 to the fourth circular saw 140 in the X-axis direction. As a result, the workpiece 90 is fixedly held in a horizontal state on the holding surface 101a of the work holder 101 (see FIG. 1).

[0063] Next, the worker performs cutting processing of the processing lines WL on both sides of the workpiece 90. Specifically, the worker operates the operation panel 171 of the plate material cutting device 100 to instruct the control device 170 to start cutting processing of the workpiece 90. In response to this instruction, the control device 170 executes a polishing processing program (not shown) to start cutting processing on both sides of the workpiece 90.

[0064] In this embodiment, the control device 170 cuts a portion of the entire length of the processing line WL on each of the lower surface 91 and the upper surface 92 of the workpiece 90 using the first circular saw 110 and the third circular saw 130, and cuts the remaining portion using the second circular saw 120. Specifically, the control device 170 operates the saw blade drive motors 116 and 136, respectively, to rotate the first circular saw 110 and the third circular saw 130, and then operates the Z-direction displacement devices 117 and 137 (extends the rods), respectively, to raise or lower the first circular saw 110 and the third circular saw 130 to a position where they come into contact with the lower surface 91 or the upper surface 92 of the workpiece 90.

[0065] In this case, the control device 170 rotates the first circular saw 110 counterclockwise as shown in the figure, and rotates the third circular saw 130 clockwise as shown in the figure. In other words, the control device 170 rotates the first circular saw 110 and the third circular saw 130 in a rotation direction in which the cutting edges of the first circular saw 110 and the third circular saw 130 rotate in the opposite direction to the relative feed direction of the workpiece 90 (feed to the right as shown).

[0066] The control device 170 keeps the second circular saw 120 and the fourth circular saw 140 stopped without driving them to rotate, and also keeps them in positions in the Z-axis direction so that they do not come into contact with the bottom surface 91 or top surface 92 of the workpiece 90. The positions of the first circular saw 110 and the third circular saw 130 at which they come into contact with the bottom surface 91 or top surface 92 of the workpiece 90 are positions that take into account the cutting depth (for example, 1 mm or less, such as 0.2 mm) that allows them to cut into the bottom surface 91 or top surface 92 of the workpiece 90, respectively, to form a processing line WL consisting of a V-shaped groove.

[0067] Next, the control device 170 operates the feed mechanisms 155, 165 to displace (so-called cutting feed) the transfer bases 151, 161 toward the workpiece 90 (to the left in the figure). As a result, in the plate material cutting device 100, the first circular saw 110 and the third circular saw 130 start cutting the work line WL from the end face on the right side in the figure of the workpiece 90 to the bottom surface 91 and the top surface 92, respectively, and proceed toward the left side in the figure (see FIG. 1). In this case, the first circular saw 110 and the third circular saw 130 perform up-cut cutting to cut the workpiece 90 by rotating in the opposite direction to the relative feed direction of the workpiece 90 (feed toward the right in the figure), so no burrs are generated on the end face on the right side in the figure of the workpiece 90.

[0068] 3, when the second circular saw 120 and the fourth circular saw 140, which are located forward in the traveling direction of the transport bases 151 and 161, pass the illustrated left end of the workpiece 90, the control device 170 switches from cutting using the first circular saw 110 and the third circular saw 130 to cutting using the second circular saw 120 and the fourth circular saw 140. Specifically, the control device 170 activates the Z-direction displacement devices 117 and 137 (shortens the rods) to lower or raise the first circular saw 110 and the third circular saw 130 to a position away from the bottom surface 91 or top surface 92 of the workpiece 90, and then interrupts the operation of the saw blade drive motors 116 and 136 to stop the rotation of the first circular saw 110 and the third circular saw 130.

[0069] As a result, the first circular saw 110 and the third circular saw 130 stop cutting the workpiece WL. That is, the first circular saw 110 and the third circular saw 130 complete cutting the portion of the entire length of the workpiece WL. Whether the second circular saw 120 and the fourth circular saw 140 have passed the illustrated left end of the workpiece 90 can be detected using physical, optical, or magnetic detectors on the conveyor bases 151 and 161, or by detecting the rotation speed of the feed drive motors 156 and 166. The time when the second circular saw 120 and the fourth circular saw 140 have passed the illustrated left end of the workpiece 90 refers to the positions in the X-axis direction when the second circular saw 120 and the fourth circular saw 140 are raised or lowered to contact the workpiece 90, respectively, and refers to the positions of the rotation drive centers of the second circular saw 120 and the fourth circular saw 140 in the X-axis direction.

[0070] Next, the control device 170 operates the saw blade drive motors 126, 146 to rotate the second circular saw 120 and the fourth circular saw 140, and then operates the Z-direction displacement devices 127, 147 (extending the rods) to raise or lower the second circular saw 120 and the fourth circular saw 140 to a position where they contact the lower surface 91 or upper surface 92 of the workpiece 90. In this case, the control device 170 rotates the second circular saw 120 clockwise as shown, and rotates the fourth circular saw 140 counterclockwise as shown. In other words, the control device 170 rotates the second circular saw 120 and the fourth circular saw 140 in a direction such that the cutting edges of the second circular saw 120 and the fourth circular saw 140 rotate in the opposite direction to the relative feed direction of the workpiece 90 (feed to the left as shown).

[0071] The control device 170 keeps the first circular saw 110 and the third circular saw 130 stopped without driving them to rotate, and also keeps them in positions in the Z-axis direction so that they do not come into contact with the bottom surface 91 or top surface 92 of the workpiece 90. The positions at which the second circular saw 120 and the fourth circular saw 140 come into contact with the bottom surface 91 or top surface 92 of the workpiece 90 are the same as the positions at which the first circular saw 110 and the third circular saw 130 come into contact with the bottom surface 91 or top surface 92.

[0072] Furthermore, the control device 170 starts the operation of the saw blade drive motors 126, 136 after suspending the operation of each of the saw blade drive motors 116, 136, but it may also start the operation of each of the saw blade drive motors 126, 136 after the rotational drive of the first circular saw 110 and the third circular saw 130 has completely stopped, or it may start the operation of each of the saw blade drive motors 126, 136 immediately after activating the Z-direction displacement devices 117, 127 (shortening the rods) to move the first circular saw 110 and the second circular saw 120 away from the lower surface 91 or upper surface 92 of the workpiece 90.

[0073] Next, as shown in Fig. 4, the control device 170 operates the feed mechanisms 155, 165 to displace the transfer bases 151, 161 in the opposite direction (to the right in the figure). As a result, in the plate material cutting device 100, the second circular saw 120 and the fourth circular saw 140 start cutting the work line WL from the end face on the left side in the figure to the bottom surface 91 and the top surface 92 of the workpiece 90, respectively, and proceed toward the right in the figure. In this case, the second circular saw 120 and the fourth circular saw 140 perform up-cut cutting to cut the workpiece 90 by rotating in the opposite direction to the relative feed direction of the workpiece 90 (feed toward the left in the figure), so no burrs are generated on the end face on the left side in the figure of the workpiece 90.

[0074] Next, when the positions of the second circular saw 120 and the fourth circular saw 140, which are located on the rear side in the traveling direction of the transport bases 151, 161, reach the ends of the processing lines WL cut by the first circular saw 110 and the third circular saw 130, respectively, the control device 170 interrupts the cutting by the second circular saw 120 and the fourth circular saw 140. Specifically, the control device 170 activates the Z-direction displacement devices 127, 147 (shortens the rods) to lower or raise the second circular saw 120 and the fourth circular saw 140 to a position away from the lower surface 91 or upper surface 92 of the workpiece 90, and then interrupts the operation of the saw blade drive motors 126, 146 to stop the rotation of the second circular saw 120 and the fourth circular saw 140.

[0075] As a result, the second circular saw 120 and the fourth circular saw 140 stop cutting the finished wire WL. That is, the second circular saw 120 and the fourth circular saw 140 complete cutting the other part of the entire length of the finished wire WL. As a result, the plate cutting device 100 stops cutting the finished wires WL formed by the first circular saw 110 and the fourth circular saw 140, respectively, and the second circular saw 120 and The processed line WL can be formed by linearly connecting each processed line WL formed by the fourth circular saw 140. That is, the first circular saw 110 and the fourth circular saw 140 that perform the cutting process of the part of the processed line WL correspond to the rear-side circular saws according to the present invention, and the second circular saw 120 and the fourth circular saw 140 that perform the cutting process of the other part of the processed line WL correspond to the front-side circular saws according to the present invention.

[0076] Next, the control device 170 returns the first circular saw 110 to the fourth circular saw 140 to their origins by the same control as above, and then stops the operation of the suction pump 103 to discontinue the generation of negative pressure on the holding surface 101a. The control device 170 then enters a standby state. This allows the operator to remove the workpiece 90 from the holding surface 101a of the work holder 101 and complete the work of forming the processed line WL.

[0077] As can be understood from the above operation description, according to the above embodiment, the plate material cutting device 100 cuts a portion of the processing line WL of the cutting process performed on the workpiece 90 using up-cutting with the first circular saw 110 and the third circular saw 130, and cuts the remaining portions of each of these processing lines WL using up-cutting with the second circular saw 120 and the fourth circular saw 140 in the reverse rotation, thereby preventing the occurrence of burrs or chips without the need for the effort of hair-pulling processing and preventing a decrease in work efficiency.

[0078] Furthermore, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the scope of the present invention. In the following modifications, the same components as those in the above-described embodiment are designated by the same reference numerals, and their description will be omitted.

[0079] For example, in the above embodiment, the plate material cutting device 100 is configured so that the second circular saw 120 and the fourth circular saw 140 do not cut the finished wire WL while the first circular saw 110 and the third circular saw 130 are cutting the finished wire WL. However, the plate material cutting device 100 can also be configured so that the second circular saw 120 and the fourth circular saw 140 cut the finished wire WL while the first circular saw 110 and the third circular saw 130 are cutting the finished wire WL.

[0080] Specifically, while the first circular saw 110 and the third circular saw 130 are cutting the workpiece WL, when the second circular saw 120 and the fourth circular saw 140 reach the start position of cutting the workpiece WL, the control device 170 controls the operation of the Z-direction displacement devices 127, 147 and the saw blade drive motors 126, 136 to start cutting the workpiece WL with the second circular saw 120 and the fourth circular saw 140, and can complete the cutting up to the end on the left side in the figure. In this case, the second circular saw 120 and the fourth circular saw 140 perform down cutting, in which the feed direction of the workpiece 90 relative to the second circular saw 120 and the fourth circular saw 140 and the rotational drive direction of the second circular saw 120 and the fourth circular saw 140 at the portion where the second circular saw 120 and the fourth circular saw 140 cut the workpiece 90 are opposite to each other.

[0081] In the above embodiment, the plate cutting device 100 is configured to stop the rotation of the second circular saw 120 and the fourth circular saw 140 while the first circular saw 110 and the third circular saw 130 are cutting the finished wire WL. This prevents the plate cutting device 100 from scattering chips generated during the cutting process by the first circular saw 110 and the third circular saw 130 into the surrounding area due to the airflow caused by the rotation of the second circular saw 120 and the fourth circular saw 140. However, the plate cutting device 100 can also be configured to rotate the second circular saw 120 and the fourth circular saw 140 while the first circular saw 110 and the third circular saw 130 are cutting the finished wire WL. The plate cutting device 100 can also be configured to rotate the first circular saw 110 and the third circular saw 130 while the second circular saw 120 and the fourth circular saw 140 are cutting the finished wire WL.

[0082] In the above embodiment, the first circular saw 110 and the third circular saw 130 cut from the right end of the workpiece 90 in the drawing, and then cut a portion of the processed line WL that had advanced until the second circular saw 120 and the fourth circular saw 140 passed the left end of the workpiece 90 in the drawing. In this case, the second circular saw 120 and the fourth circular saw 140 are disposed adjacent to the first circular saw 110 and the third circular saw 130, respectively. Therefore, the length of the portion of the processed line WL cut by the first circular saw 110 and the third circular saw 130, respectively, is sufficiently longer than the length of the remaining portion of the processed line WL cut by the second circular saw 120 and the fourth circular saw 140, respectively. However, in cutting the processed wire WL, the length of the portion of the processed wire WL cut by the first circular saw 110 and the third circular saw 130 may be the same as the length of the remaining portion of the processed wire WL cut by the second circular saw 120 and the fourth circular saw 140, respectively, or the length of the remaining portion may be longer.

[0083] In the above embodiment, the board cutting device 100 is configured such that the first circular saw 110, the circular saw drive mechanism 111, the second circular saw 120, and the circular saw drive mechanism 121 are all mounted on a common transport base 151, and the third circular saw 130, the circular saw drive mechanism 131, the fourth circular saw 140, and the circular saw drive mechanism 141 are all mounted on a common transport base 161. However, the board cutting device 100 can also be configured such that each circular saw and each circular saw drive mechanism is supported by a separate transport base.

[0084] In the above embodiment, the plate cutting device 100 is configured such that the first circular saw 110 and the second circular saw 120 are arranged vertically in the X-axis direction, and the third circular saw 130 and the fourth circular saw 140 are arranged vertically in the X-axis direction. However, the plate cutting device 100 can also be configured such that the first circular saw 110 and the second circular saw 120 are arranged in parallel in the Y-axis direction, and the third circular saw 130 and the fourth circular saw 140 are arranged in parallel in the Y-axis direction. In this case, the plate cutting device 100 may be provided with a Y-direction displacement device that displaces the conveying base 151 in the Y-axis direction.

[0085] In the above embodiment, the first circular saw 110 and the second circular saw 120 cut the work line WL as rear-side circular saws when positioned rearward in the feed direction. However, the first circular saw 110 and the second circular saw 120 can also cut the work line WL when positioned forward in the feed direction. Specifically, the plate cutting device 100 interchanges the installation positions of the first circular saw 110 and the circular saw drive mechanism 111 and the second circular saw 120 and the circular saw drive mechanism 121 on the conveying base 151.

[0086] The control device 170 then cuts a part of the processing line WL by using the first circular saw 110 to cut from the end of the workpiece 90 on the right side in the drawing, and then interrupts the cutting by the first circular saw 110 before reaching the end of the workpiece 90 on the left side in the drawing, and continues the cutting (down cut) by using the second circular saw 120 from the interrupted position toward the end of the workpiece 90 on the left side in the drawing, or leftThe cutting is controlled so that cutting (up cut) is performed from the side edge to the interrupted portion. Similarly, the plate material cutting device 100 can also cut the processing line WL with the third circular saw 130 and the fourth circular saw 140 when they are positioned forward in the feed direction.

[0087] Furthermore, in the above embodiment, the board cutting device 100 is configured to include the third circular saw 130, circular saw drive mechanism 131, fourth circular saw 140, and circular saw drive mechanism 141 in addition to the first circular saw 110, circular saw drive mechanism 111, second circular saw 120, and circular saw drive mechanism 121. However, the board cutting device 100 can also be configured without the third circular saw 130, circular saw drive mechanism 131, fourth circular saw 140, and circular saw drive mechanism 141. In this case, the plate cutting device 100 is configured by providing the first circular saw 110, circular saw drive mechanism 111, second circular saw 120 and circular saw drive mechanism 121 on the illustrated upper side of the work holder 101; in other words, the first circular saw 110, circular saw drive mechanism 111, second circular saw 120 and circular saw drive mechanism 121 can be omitted and only the third circular saw 130, circular saw drive mechanism 131, fourth circular saw 140 and circular saw drive mechanism 141 can be provided.

[0088] Furthermore, in the above embodiment, the plate cutting device 100 is configured such that the third circular saw 130 is positioned opposite the first circular saw 110 in the Z-axis direction, and the fourth circular saw 140 is positioned opposite the second circular saw 120 in the Z-axis direction. However, the third circular saw 130 and the fourth circular saw 140 can also be positioned on the Z-axis side of the first circular saw 110 and the second circular saw 120, but offset in the X-axis direction.

[0089] Furthermore, in the above embodiment, the plate cutting device 100 synchronizes the first circular saw 110 and the third circular saw 130 with each other to cut the workpiece 90, and also synchronizes the second circular saw 120 and the fourth circular saw 140 with each other to cut the workpiece 90. However, the plate cutting device 100 can also cut the workpiece 90 with the first circular saw 110 and the third circular saw 130 not synchronized with each other but shifted in time, and can also cut the workpiece 90 with the second circular saw 120 and the fourth circular saw 140 not synchronized with each other but shifted in time.

[0090] In the above embodiment, the plate material cutting device 100 performed cutting processing on a printed circuit board as the workpiece 90. However, the plate material cutting device 100 can also perform cutting processing on plate materials other than printed circuit boards as the workpiece 90. Here, the workpiece 90 can be, for example, a ceramic material such as glass or porcelain, wood, metal, paper, or resin. Furthermore, the thickness of the workpiece 90 is not particularly limited.

[0091] In the above embodiment, the plate material cutting device 100 formed the processing line WL consisting of a V-shaped groove on each of the lower surface 91 and the upper surface 92 of the workpiece 90. However, the plate material cutting device 100 can form the processing line WL consisting of a V-shaped groove on at least one of the lower surface 91 and the upper surface 92 of the workpiece 90. In addition, the plate material cutting device 100 can also form the processing line WL consisting of a cutting line that completely separates the workpiece 90. [Explanation of symbols]

[0092] WL…processed line, 90...Workpiece, 91...Bottom surface, 92...Top surface, 100...Plate cutting equipment, 101... workpiece holder, 101a... holding surface, 102... tool slit, 103... suction pump, 110...first circular saw, 111...circular saw drive mechanism, 112...movable arm, 113...bearing, 113a...rotating shaft, 113b...pulley, 114...drive belt, 115...bearing, 116...saw blade drive motor, 116a...drive shaft, 116b...pulley, 117...Z-direction displacement device, 120... second circular saw, 121... circular saw drive mechanism, 122... movable arm, 123... bearing, 123a... rotating shaft, 123b... pulley, 124... drive belt, 125... bearing, 126... saw blade drive motor, 126a... drive shaft, 126b... pulley, 127... Z-direction displacement device, 130...Third circular saw, 131...Circular saw drive mechanism, 132...Movable arm, 133...Bearing, 133a...Rotating shaft, 133b...Pulley, 134...Drive belt, 135...Bearing, 136...Saw blade drive motor, 136a...Drive shaft, 136b...Pulley, 137...Z-direction displacement device 140...fourth circular saw, 141...circular saw drive mechanism, 142...movable arm, 143...bearing, 143a...rotating shaft, 143b...pulley, 144...drive belt, 145...bearing, 146...saw blade drive motor, 146a...drive shaft, 146b...pulley, 147...Z-direction displacement device 151...Transfer base, 152...Base support stand, 153...Slide rail, 154...Block through slit, 155...Feed mechanism, 156...Feed drive motor, 157...Feed shaft, 158...Feed block, 161...Transfer base, 162...Base support stand, 163...Slide rail, 164...Block through slit, 165...Feed mechanism, 166...Feed drive motor, 167...Feed shaft, 168...Feed block, 170...control device, 171...operation panel.

Claims

1. a first circular saw that cuts a processing line that extends linearly on one side of a plate-shaped workpiece; a second circular saw that cuts a processing line that extends linearly on one surface of the workpiece; a first circular saw rotating means for rotating the first circular saw; a second circular saw rotating means for rotating the second circular saw in a direction opposite to the direction in which the first circular saw is rotated; a single-side circular saw feed means for relatively displacing the first circular saw and the second circular saw in a direction along the processing line with respect to the workpiece; a one-side Z-direction displacement means for moving the first circular saw and the second circular saw toward or away from one side of the workpiece in a direction perpendicular to the one side of the workpiece; a control device for controlling the operation of each of the first circular saw rotation means, the second circular saw rotation means, the one-side circular saw feeding means, and the one-side Z-direction displacement means; a third circular saw disposed opposite to the first circular saw and configured to cut a processing line extending linearly on the opposite surface of one side of the workpiece; a fourth circular saw disposed opposite the second circular saw and configured to cut a processing line extending linearly on the opposite surface of the workpiece; a third circular saw rotating means for rotating the third circular saw; a fourth circular saw rotating means for rotating the fourth circular saw in a direction opposite to the direction in which the third circular saw is rotated; an opposite surface side circular saw feeding means for relatively displacing the third circular saw and the fourth circular saw in a direction along the processing line with respect to the opposite surface of the workpiece; an opposite surface side Z direction displacement means for moving the third circular saw and the fourth circular saw toward or away from each other in a direction perpendicular to the opposite surface of the workpiece, The control device a cutting device for cutting a part of the work line by using one of the first and second circular saws to make an up-cut cut from one end of one side of the workpiece, and a cutting device for cutting a remaining part of the work line including the other end of the one side of the workpiece using an up-cut or down-cut by using the other circular saw rotated in the opposite direction from the one circular saw; and a cutting device for cutting a part of the work line by using one of the third and fourth circular saws to make an up-cut cut from one end of the other side of the workpiece, and a cutting device for cutting a remaining part of the work line including the other end of the other side of the workpiece using an up-cut or down-cut by controlling the operation of the third circular saw rotation means, the fourth circular saw rotation means, the opposite side circular saw feed means, and the opposite side Z-direction displacement means.

2. The plate cutting device according to claim 1, The control device A plate cutting device characterized in that while one of the first circular saw and the second circular saw is performing cutting work, the other circular saw is not performing cutting work.

3. The plate cutting device according to claim 1 or 2, The first circular saw and the second circular saw are They are supported on a single conveying table and displaced together in a direction along the processing line, The control device A plate cutting device, characterized in that while one of the first circular saw and the second circular saw is driven to rotate, the other circular saw is stopped from rotating.

4. The plate cutting device according to any one of claims 1 to 3, The first circular saw and the second circular saw are are arranged in a vertical row along the processing line, The control device A plate material cutting device characterized in that a rear circular saw, which is located rearward in the feed direction of the first circular saw and the second circular saw, cuts a portion of the processing line and cuts the remainder of the processing line.

5. The plate cutting device according to claim 4, The control device A plate cutting device characterized in that, when the rear circular saw is cutting a portion of the processing line and the position of the front circular saw, which is located forward of the rear circular saw, exceeds the other end of one side of the workpiece, the cutting by the rear circular saw is interrupted and the remaining cutting of the processing line is started using the front circular saw.

6. The plate cutting device according to claim 1, The control device A plate cutting device characterized in that cutting of one side of the workpiece by the first circular saw and the second circular saw and cutting of the opposite side of the workpiece by the third circular saw and the fourth circular saw are performed in synchronization.

Images