JP6029351B2 - Laser cutting method, product manufacturing apparatus, and product manufacturing method - Google Patents

Description

  The present invention relates to a laser cutting method, a product manufacturing apparatus, and a product manufacturing method, and more particularly to a laser cutting method, a product manufacturing apparatus, and a product manufacturing method for cutting a sheet-like member with a laser beam.

  In recent years, laser light has been used for cutting sheet-like members such as metal foils. Such a cutting process using a laser beam is also used for cutting when forming an electrode tab in the manufacture of a battery (Patent Document 1).

JP 2009-032504 A

  However, when the electrode tab is formed, if the metal foil that is the base of the electrode tab is cut with laser light, burrs are generated along the cutting line irradiated with the laser light. There is a problem in that this burr is caught when removing the cut unnecessary part (scrap) and cannot be removed well.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a laser cutting method and a laser cutting apparatus that can reliably remove unnecessary portions generated during laser cutting.

In order to achieve the above object, the laser cutting method of the present invention irradiates a sheet-like member with laser light and cuts it into a first member that becomes a part of the product and a second member that becomes an unnecessary part. Then, the first member and the second member are relatively moved in a direction orthogonal to the plane of the sheet-like member to separate the first member and the second member, and then the second member is removed. When separating the first member and the second member, the first member is moved in a direction orthogonal to the plane of the sheet-like member together with the product whose mass is heavier than that of the second member.

In addition, the product manufacturing apparatus of the present invention for achieving the above object is a laser that irradiates a laser beam for cutting a sheet-like member into a first member that is a part of the product and a second member that is an unnecessary part. Irradiation means, moving means for moving the first member and the second member in a direction perpendicular to the plane of the sheet-like member to separate the first member and the second member, and a removing means for removing the second member And having. The moving means moves the first member in the direction perpendicular to the plane of the sheet-like member together with the product whose mass is heavier than that of the second member to separate the first member from the second member.

Moreover, the manufacturing method of the product of this invention for achieving the said objective irradiates a sheet-like member with a laser beam, and cut | disconnects into the 1st member used as a part of product, and the 2nd member used as an unnecessary part. Then, the first member and the second member are relatively moved in a direction orthogonal to the plane of the sheet-like member to separate the first member and the second member, and then the second member is removed. When separating the first member and the second member, the first member is moved in a direction orthogonal to the plane of the sheet-like member together with the product whose mass is heavier than that of the second member.

  According to the present invention, after cutting a sheet-like member into a first member that becomes a part of a product and a second member that becomes an unnecessary part by laser light, the cut first member and second member are cut into the sheet-like member. The first member and the second member are separated by moving relatively in a direction orthogonal to the plane. For this reason, the first member and the second member can be relatively moved in a direction in which the burr between the first member and the second member is not caught, and the first member and the second member can be reliably separated. it can.

It is the schematic for demonstrating the laser cutting device to which this invention is applied, (a) is a top view which shows the principal part seen from the top, (b) is a side view. It is explanatory drawing for demonstrating the detail of a scrap removal part and a base, (a) is an enlarged plan view of the part which cut | disconnects an electrode tab, and an enlarged side view of the part which cut | disconnects an electrode tab. It is a perspective view which shows the external appearance of the battery by which lamination sealing was carried out. (A) is a top view which shows the state before electrode tab formation of a battery, (b) is a top view which shows the state after electrode tab formation of a battery. It is explanatory drawing for demonstrating the cutting operation by a laser cutting device. It is explanatory drawing for demonstrating the cutting | disconnection operation | movement by the laser cutting device following FIG. It is an enlarged plan view of the electrode foil part for demonstrating the cutting line path | route used as the irradiation trace of the laser beam to electrode foil.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Moreover, the size and ratio of each member in the drawings are exaggerated for convenience of explanation, and are different from the actual size and ratio.

  1A and 1B are schematic views for explaining a laser cutting apparatus to which the present invention is applied, wherein FIG. 1A is a plan view showing a main part viewed from above, and FIG. 1B is a side view. In addition, in (b), the state which has arrange | positioned the battery 100 is shown.

  This laser cutting device is a device for separating an electrode tab (first member), which is a part of a product, from electrode foil drawn out of a battery exterior and scrap (second member), which is an unnecessary part. In addition, in this embodiment, electrode foil is a sheet-like member which cuts out an electrode tab by laser cutting. Moreover, in this embodiment, the metal foil which has come out from the exterior of the battery of the state before cut | disconnecting in the shape of the electrode tab which is a product shape is called electrode foil.

  The laser cutting device 1 includes a stage 11 on which a battery 100 as a workpiece is placed, a laser irradiation device 12 that irradiates laser light, a scrap removing unit 13 that removes scraps after cutting, and electrode foils 111 and 112 (from the battery 100) (See FIG. 4) A pedestal 14 on which a portion is placed and an elevator 15 for moving the stage 11 up and down.

  An elevator 15 is attached to the stage 11 and moves up and down with the battery 100 mounted. The raising / lowering operation of the stage 11 by this elevator 15 will be described later. The elevator 15 may be any type such as an air cylinder, an oil cylinder, a lifting mechanism using a ball screw, or the like, as long as it can at least move the stage up and down to two positions, the rising position and the lowering position. In addition, it may be possible to change the position to three or four levels, or to an arbitrary height.

  Further, a pedestal 14 on which the electrode foils 111 and 112 (see FIG. 4) extending from the battery 100 are mounted is attached to the stage 11 so as to be movable relative to the stage 11. That is, in this embodiment, the pedestal 14 is fixed and maintains its position even when the stage 11 is moved up and down.

  Further, a step is provided between the stage surface and the pedestal surface. This is because the electrode foils 111 and 112 are placed on the base 14 when the laminate-sealed portion of the battery 100 (referred to as the battery main body portion 110) is placed on the stage 11. is there.

  By providing this pedestal 14, as will be described later, when the scrap removing portion 13 is pressed against the electrode foils 111 and 112 from above, the electrode foils 111 and 112 are not deformed.

  The laser irradiation device 12 includes a laser irradiation unit 21 (laser irradiation unit) that irradiates the electrode foils 111 and 112 with laser light, and a control unit 22 (control unit) that controls the laser light to draw a locus along a predetermined cutting line. )have. The laser irradiation unit 21 is attached to, for example, an arm 25 extending from the outside of the stage 11. The laser irradiation unit 21 rotates around two axes (axis 26 and axis 27) by motors (not shown). Instead of the arm 25 as described above, a laser irradiation unit 21 may be provided at the tip of the arm of the multi-axis robot so that the direction of the laser beam can be freely changed.

  The control unit 22 controls the motors of the shafts 26 and 27 so that laser light is irradiated along a cutting line to be described later. The control unit 22 also controls the operation of the laser irradiation on / off, the scrap removing unit 13, and the elevator 15. In particular, in the control of the scrap removing unit 13 by the control unit 22, the suction pressure of the suction pad (described later in detail) is monitored to determine whether or not there is a cutting defect depending on whether or not the slap is sucked by the suction pad. ing.

  Although the control unit 22 is illustrated in FIG. 1B, the control unit 22 does not have to be near the stage 11 and is connected to each unit by a signal line or the like, so that the direction of the laser beam can be freely controlled. It can be anywhere if possible.

  The laser irradiation unit 21 is connected to a laser generation source (not shown), and laser light guided from the laser generation source is emitted from the tip of the laser irradiation unit 21.

  The scrap removing unit 13 serves as a removing unit, and when two electrode tabs (a positive electrode tab and a negative electrode tab) are formed, two identical members are provided to remove scraps from the respective electrode tabs. Each scrap removing unit 13 includes an arm 31 and a suction pad 32 (suction means) provided at the tip of the arm 31. A suction port (not shown) is provided on the contact surface of the suction pad 32 with the electrode foil 111 (112) to suck the electrode foil 111 (112). An air suction device 35 is provided for this suction operation. The suction pad 32 has a motor (not shown) that moves the arm 31 about the fulcrum 33 so as to draw an arc (shown a).

  The air suction unit 35 includes a vacuum degree detector 36 that detects the degree of vacuum in the air path 38 from the air suction unit 35 to the suction pad 32. The vacuum degree detector 36 detects a degree of vacuum that is a measure of the adsorption pressure when scrap is adsorbed on the adsorption pad 32. When the scrap is adsorbed on the suction pad 32, the degree of vacuum increases (in a state where the adsorption pressure is high), and when the scrap adsorbed on the suction pad 32 comes off, the degree of vacuum decreases (in a state where the adsorption pressure is low). . Therefore, by detecting such a change in the degree of vacuum, in particular, a change in which the degree of vacuum once increased, it is possible to detect that the scrap that has stuck once has come off. That is, when the adsorption pressure does not change, the electrode tab portion and the scrap portion are cleanly separated, indicating that the scrap portion can be removed without any problem. On the other hand, when the adsorption pressure changes, the scrap that is adsorbed is detached from the adsorption pad 32. This may be because the electrode tab portion and the scrap portion are not separated cleanly, that is, there is a possibility of cutting failure. Is shown.

  The vacuum detector 36 is connected to the control unit 22 by a signal line. The control unit 22 determines whether or not there is a cutting defect depending on whether or not the scrap is removed from the degree of vacuum detected by the degree of vacuum detector 36. Therefore, the vacuum degree detector 36 and the control unit 22 serve as cutting state determination means. The vacuum degree detector 36 may be provided not in the air suction device 35 but in the middle of the air pipe 38 from the air suction device 35 to the suction pad 32.

  Here, the detail of the scrap removal part 13 and the base 14 is demonstrated. FIG. 2 is an explanatory diagram for explaining details of the scrap removing unit 13 and the pedestal 14, and FIG. 2A is an enlarged plan view of a portion for cutting the electrode tab, and an enlarged side view of a portion for cutting the electrode tab. This also shows a state before the electrode foils 111 and 112 are cut into electrode tabs.

  At the time of laser cutting, the suction pad 32 of the scrap removing unit 13 presses the region portion that becomes the scrap 120 excluding the laser irradiation region before being irradiated with the laser beam (becomes a pressing unit).

  The suction pad 32 has a shape that does not interfere with the cutting line 130 irradiated with the laser light. That is, the shape of the suction pad 32 is formed along the cutting line 130 such that a gap is left between the battery body portion 110 and the end portion of the suction pad 32 on the battery body portion side. This prevents interference between the suction pad 32 and the laser during laser irradiation. More preferably, as shown in FIG. 2B, the end of the suction pad 32 on the region irradiated with the laser beam is cut obliquely so that the laser beam is easily irradiated and does not interfere. .

  The suction pad 32 presses the electrode foils 111 and 112 in the direction of the base 14 before the laser irradiation. Thereby, when the electrode foil 111 is floating from the pedestal 14 or deformed, these can be corrected and can be cut at a correct position.

  On the other hand, the pedestal 14 is provided with a groove 141 wider than the cutting line along the cutting line portion irradiated with the laser beam. The groove 141 absorbs or diffuses the laser light that has passed through the electrode foils 111 and 112 to prevent reflection from the pedestal surface.

  In addition, when the shapes of the positive electrode tab 101 and the negative electrode tab 102 (hereinafter collectively referred to as electrode tabs) are different, the cutting line 130 is set so as to be in the shape of the positive electrode tab 101 and the negative electrode tab 102. The end shape of the suction pad 32 is formed, and the groove 141 is provided in the base 14.

  Here, an example of the battery will be described. FIG. 3 is a perspective view showing the appearance of a laminated battery. 4A is a plan view showing a state before the electrode tab is formed, and FIG. 4B is a plan view showing a state after the electrode tab is formed.

  The battery 100 described here is a battery in which a power generation element is sealed with a laminate film. As is well known, a laminate film has a laminated film structure in which a metal foil (for example, an aluminum foil) is sandwiched between resin films. The battery 100 covered (sealed) with the laminate film is entirely covered with the laminate film 200 and has a power generation element inside. In the illustrated battery 100, a portion covered with the laminate film 200 (with the power generation element included) is referred to as a battery main body portion 110. In this battery 100, two electrode tabs (positive electrode tab 101 and negative electrode tab 102) serving as electrode terminals are drawn from one side. The laminate film 200 is sealed by being bonded by thermal fusion or an adhesive at the peripheral edge portion 210 thereof.

  In this battery 100, in a state before the electrode tab is formed, as shown in FIG. 4A, the electrode foils 111 and 112 before the electrode tab is formed are left outside the battery main body 110 as they are. There are two electrode foils 111 and 112, one for the positive electrode and one for the negative electrode. Such electrode foils 111 and 112 are formed into the shape of the positive electrode tab 101 and the negative electrode tab 102 by laser cutting, as shown in FIG. 4B.

  Next, the cutting operation by the laser cutting device 1 will be described.

  5 and 6 are explanatory diagrams for explaining the cutting operation by the laser cutting device 1.

  In the cutting operation by the laser cutting device 1, first, as shown in FIG. 5A, the battery 100 is placed on the stage 11 when the stage 11 is in the lower position. The battery 100 is in a state before the electrode foils 111 and 112 are cut into electrode tab shapes (referred to as before electrode tab processing). At this time, as shown in FIG. 5A, the scrap removing unit 13 is in a state separated from the pressing position. When the battery 100 before the electrode tab processing is placed on the stage 11, the electrode foils 111 and 112 are positioned so as to be on the pedestal 14. For this positioning, for example, an abutting member for abutting and positioning the end of the battery 100 on the stage 11 may be provided.

  Subsequently, as shown in FIG. 5B, the arm 31 is tilted about the fulcrum 33 to bring the suction pad 32 onto the electrode foils 111 and 112 of the battery 100. Thereby, the suction pad 32 presses the electrode foils 111 and 112 before the electrode tab processing (before laser cutting) toward the base 14. Accordingly, in this state, the scrap removing unit 13 serves as a pressing unit, and the suction pad 32 presses the region portion that becomes the scrap 120 excluding the laser irradiation region. The suction pad 32 starts the suction operation with the electrode foils 111 and 112 being pressed.

  Thereafter, the laser irradiation unit 21 irradiates laser light along a predetermined cutting line to perform cutting processing. The shape of the cutting line (laser irradiation locus) will be described later.

  At this stage, the suction pad 32 continues to suck the scrap 120 and press the scrap 120 against the pedestal 14 even after the end of cutting.

  Thereafter, as shown in FIG. 6A, the stage 11 is raised by the elevator 15. That is, the electrode tabs 101 and 102 (first member) are raised in a direction orthogonal to the plane while the scrap 120 (second member) is pressed. As a result, the electrode tabs 101 and 102 and the scrap 120 formed by cutting are separated from each other in a direction perpendicular to the plane of the original electrode foils 111 and 112 without the burrs of each other being caught. In addition, the broken line of the stage 11 part in Fig.6 (a) has shown the position (position of FIG. 5) before raising the stage 11 upwards.

  The upper limit of the amount of movement to raise the stage 11 is set within a range in which the electrode tab 101 or 102 and the scrap 120 are not broken even when the scrap 120 part is not completely separated due to cutting failure. With this amount of movement, even though the electrode tabs 101 and 102 may be slightly deformed, product defects (defects that extend to the battery body) will not occur.

  On the other hand, the lower limit value of the moving amount may be moved so that the electrode tabs 101 and 102 come out of the scrap 120 in the vertical direction according to the thickness of the electrode foils 111 and 112. Specifically, the electrode tabs 101 and 102 and the scrap 120 can be separated only by raising the thickness of the electrode foils 111 and 112 to about the thickness.

  Here, in the present embodiment, the battery main body portion 110 is moved, and the reason will be described below.

  The electrode tabs 101 and 102 (first member) are a part of the product (secondary battery), but are cut out by laser cutting from the electrode foil (sheet-like member) originally protruding from the battery main body portion 110. It is what is formed.

  At the time of this cutting, in this embodiment, the scrap 120 side which is an unnecessary part is pressed down by the suction pad 32.

  The electrode tabs 101 and 102 immediately after cutting are integrally attached to the battery body 110. For this reason, the electrode tabs 101 and 102 are relatively heavier than the scrap 120 as a whole. For this reason, even when a frictional force is generated between the electrode tabs 101 and 102 and the scrap 120 when the battery main body portion 110 is lifted from below, the force that lifts the battery main body portion 110 that requires a larger force than the scrap 120 is lifted. Can be easily separated from the scrap 120.

  Subsequently, as shown in FIG. 6B, the suction pad 32 is returned to the original position. At this time, the suction pad 32 moves in an arc shape. Therefore, the scrap 120 is not lifted vertically upward with respect to the electrode foils 111 and 112 of the battery 100 but is pulled obliquely (in the direction of the arrow b in the figure) in the direction above the fulcrum 33, which is the direction in which the suction pad 32 opens. Will be.

  And immediately after the operation | movement which leaves | separates from the position which this suction pad 32 presses, the control part 22 monitors a vacuum degree, and judges whether the scrap 120 has come off from the suction pad 32 from the change of a vacuum degree. Here, when a change in the degree of vacuum is detected, the suction pad 32 is stopped. The reason why the degree of vacuum changes includes a case where the scrap 120 is simply removed, but in addition to this, even when the scrap 120 is not completely separated due to a cutting failure, the portion that becomes the scrap 120 from the suction pad 32 , So that it can be detected that a cutting failure has occurred.

  The adsorbing force with which the adsorbing pad 32 adsorbs the scrap 120 only needs to adsorb the metal piece that has become the scrap 120, and therefore does not have to be so strong. Therefore, it is preferable that the suction force of the suction pad 32 be set to such an extent that the scrap 120 is detached from the suction pad 32 when the electrode tab 101 or 102 and the scrap 120 cannot be cut due to a cutting failure. As a result, even if there is a cutting failure, the scraping 120 comes off from the suction pad 32 without the electrode tab 101 or 102 being deformed or broken by the movement of the suction pad 32.

  Note that the scrap 120 is collected by dropping the scraping force 120 and dropping the scrap 120 when the suction pad 32 is opened approximately 45 to 90 degrees. Therefore, the degree of vacuum may be monitored until the position of the suction pad 32 stops air suction at this collection position.

  After the scrap 120 is removed, the battery after forming the electrode tab is transported and taken out from the stage. For this reason, when the conveying position is higher than that at the time of laser cutting, the stage 11 may be raised to a higher position using the elevator 15 after the scrap 120 is removed. However, even in this case, the rising amount of the stage 11 in the stage immediately after laser cutting and before scrap removal is kept small in preparation for the case where there is a cutting failure as described above, and thereafter there is no cutting failure. When it is judged, it is raised to the height of the transport position.

  Next, a cutting line (laser beam irradiation locus) at the time of laser cutting will be described.

  FIG. 7 is an enlarged plan view of an electrode foil portion for explaining a cutting line that becomes an irradiation locus of laser light to the electrode foil.

  The cutting line serving as the laser beam irradiation trajectory is set so that the laser beam can be irradiated with a single stroke. That is, as shown in the drawing, the cutting line that becomes the locus of the laser beam starts from the path a and passes through the paths b, c, d, e (conversely, starting from e, the d, c, b, a may be the order).

  When the scrap 120 is removed, the scrap 120 is sucked by the suction pad 32, and the suction pad 32 is moved away in an arc shape and removed. Therefore, in a plan view (when the electrode foil is viewed from above), the paths b and d of the cutting line in the same direction as the locus of the circular arc drawn by the suction pad 32 are the gap (cutting portion) between the electrode tab 101 and the scrap 120. ) Does not spread. Therefore, if the scrap 120 is removed without raising the stage 11 as it is, the burrs move in a rubbing direction, and the burrs on the electrode tab side and the burrs on the scrap side are easily caught.

  Therefore, in the present embodiment, as already described, after cutting with the laser beam and before releasing the suction pad 32 from the position where the suction pad 32 is pressed, the stage 11 is slightly raised so that the electrode tabs 101 and 102 side are connected to the electrode foil 111, It is moved in a direction perpendicular to the surface 112. As a result, the electrode tabs 101 and 102 and the scrap 120 are moved away from each other in the direction perpendicular to the surfaces of the electrode foils 111 and 112. As the stage 11 moves upward, burrs do not get caught. Moreover, even if a frictional force is generated between the electrode tabs 101 and 102 and the scrap 120 due to the upward movement of the stage 11, the electrode tabs 101 and 102 and the scrap 120 are completely removed by utilizing the force to lift the battery body portion 110. Can be released.

  Thereafter, even if the scrap 120 is moved in an oblique direction, the electrode tabs 101 and 102 and the scrap 120 are completely separated from each other at that time, so that the scrap 120 can be reliably removed without being caught between them. .

  In FIG. 7, only the electrode foil 111 to be the positive electrode tab 101 is shown, but the electrode foil 112 to be the negative electrode tab 102 has the same shape, and thus a cutting line may be set similarly.

  According to this embodiment described above, the following effects are obtained.

  (1) The electrode foil (sheet-like member) is cut by laser light into an electrode tab (first member) remaining as a part of the product and scrap (second member) cut off as an unnecessary part. Then, the electrode tab was moved in the direction orthogonal to the surface of the electrode foil for the entire product having a relatively higher mass than the scrap.

  Thus, since it can be surely lifted in a direction perpendicular to the surface of the electrode foil, the electrode tab and scrap burrs can be pulled apart without being caught. Furthermore, even if friction is generated between the electrode tab and the scrap, it can be easily pulled apart by using the lifting force of the entire product that requires a larger force than lifting the scrap. And if scrap is removed after that, scrap can be removed reliably. Moreover, when scrap is removed, even if the movement trajectory is oblique, the electrode tab and scrap are already separated, so that no burrs are caught.

  (2) When the electrode tab (first member) and the scrap (second member) are moved, even if the electrode tab and the scrap are not completely cut due to defective cutting, the electrode tab and the scrap are thousand. It was within the range that could not be cut. For this reason, even when it is not cut | disconnected, it can prevent that the defect which the side used as an electrode tab cuts off in parts other than the scheduled cutting line does not generate | occur | produce.

  (3) It can be detected that the electrode tab (first member) and the scrap (second member) are not cut by judging the cutting failure.

  (4) Using the suction pad to remove scrap (second member), the electrode tab and scrap are assumed to have been cut well when the suction pressure does not change. Judgment can be made.

  (5) Before performing laser cutting, the region to be scrap (second member) is pressed down except for the laser irradiation region. Thereby, it becomes possible to irradiate the laser beam with the electrode foil (sheet-like member) kept flat.

  (6) In the secondary battery as a product, the electrode tab (first member) and scrap (first member) are cut by cutting the electrode foil (sheet-like member) from the secondary battery (main body part) with a laser beam. 2 parts). By this cutting, the electrode tab (first member) side becomes a secondary battery itself as a whole product, so that the mass is heavier than the scrap side. Therefore, by moving the electrode tab side (that is, the secondary battery body side), even if friction occurs between the electrode tab and the scrap, the force that lifts the entire product that requires a larger force than lifting the scrap is used. Thus, the electrode tab and the scrap can be reliably pulled apart.

  Although the embodiment to which the present invention is applied has been described above, the present invention is not limited to the above-described embodiment. That is, it is only necessary to move the electrode tab side and the scrap relative to each other in the direction orthogonal to the surface of the electrode foil, and the scrap may be moved or both may be moved.

  In the above-described embodiment, an example in which two electrode tabs are drawn from one side as a battery has been described as an example. However, the present invention is not limited to such a battery. For example, electrode tabs are drawn from two opposite sides. The present invention can also be applied to a battery of a different form.

  In the above-described embodiment, after the cutting operation of the electrode foil, the scrap side is pressed, the stage is lifted, and the electrode tab of the battery is raised upward with respect to the scrap. Instead, the stage is lowered. You may move so that the electrode tab (1st member) of a battery may fall with respect to a scrap (2nd member). By this operation, the electrode tab (first member) moves relative to the scrap (second member) in a direction perpendicular to the surface of the electrode foil (sheet-like member), which is described in the embodiment. The same effect as the above can be obtained.

  As shown in FIG. 2, the suction position of the suction pad 32 with respect to the scrap 120 is preferably pressed down on the entire side to be the scrap 120, but instead of this, a part of the scrap may be pressed down.

  Furthermore, although embodiment mentioned above demonstrated as an example forming the electrode tab shape of a battery as a sheet-like member which is a cutting | disconnection object, this invention is not limited to electrode tab formation of a battery, Various sheet-like members It can be applied to laser cutting. For example, the present invention can also be applied to a case where the entire product is a sheet shape and a part thereof is cut into a shape that becomes the first member.

  Further, the cutting line may be cut out in any shape. As shown in FIG. 7, the electrode tab (first member) side to be a product has a rectangular shape and scrap (second) which is an unnecessary part. The member) side is not limited to a concave shape. For example, when the first member side that is a product is a polygonal shape such as a triangle or a quadrangle, or a circle or arc shape, and the second member side that is an unnecessary part has a corresponding shape, or simply the first member and the second member The present invention can also be applied when cutting linearly or curvedly.

  In addition, as long as the present invention has a configuration defined in the scope of claims, a configuration other than those described here may be added or a configuration may not exist, and various forms are possible. Needless to say, it is included in

1 Laser cutting device,
11 stages,
12 Laser irradiation device,
13 Scrap removal section,
14 pedestal,
15 Elevator,
21 Laser irradiation part,
22 control unit,
25 arms,
32 suction pads,
33 fulcrums,
35 Air aspirator,
36 Vacuum detector,
100 batteries,
101, 102 electrode tab,
110 Battery body part,
111, 112 electrode foil,
120 scrap 130 cutting line.

Claims (18)

Irradiating the sheet-like member with laser light and cutting it into a first member that becomes a part of the product and a second member that becomes an unnecessary part (a);
(B) separating the first member and the second member by relatively moving the first member and the second member in a direction orthogonal to the plane of the sheet-like member;
Removing the second member (c);
Have
Said step (b) comprises:
Wherein the first member, wherein a, Relais chromatography The cutting method to be moved in a direction perpendicular to the plane of the mass than the second member is heavy the product by the sheet member. The amount of movement when the first member is separated from the second member in the step (b) is the first member and the second member when the first member and the second member cannot be cut. The laser cutting method according to claim 1, wherein the member is within a range where the member is not broken. 3. The laser cutting method according to claim 1, further comprising a step (d) of determining whether or not the first member and the second member are separated from each other after the step (b). In the step (c), the second member is adsorbed and removed.
Said step (d) is as defined in claim 3, characterized in that it is determined that the suction pressure which is adsorbed the second member is apart the first member and the second member when no change Laser cutting method. In the step (a), before the irradiation of the laser beam, any one of claims 1-4, wherein the laser beam is characterized by pressing the area corresponding to the second member except for the area to be irradiated The laser cutting method as described in one. 2. The product according to claim 1, wherein the product is a secondary battery, and an electrode foil that is the sheet-like member coming out of the secondary battery is cut into a shape of an electrode tab that becomes the first member by laser cutting. The laser cutting method according to any one of 5 to 5 . Laser irradiation means for irradiating laser light for cutting the sheet-like member into a first member that is a part of the product and a second member that is an unnecessary part;
Moving means for relatively moving the first member and the second member in a direction perpendicular to the plane of the sheet-like member to separate the first member and the second member;
Removing means for removing the second member;
Have
The moving means is
Made the first member, you characterized by separating the second first member mass moves in a direction perpendicular to the plane of heavy said product by said sheet-like member than members from said second member Product manufacturing equipment. The amount of movement when the first member is separated from the second member by the moving means is such that the first member and the second member are in a thousand when the first member and the second member cannot be cut. 8. The product manufacturing apparatus according to claim 7 , wherein the product manufacturing apparatus is in a range that does not break. 9. The apparatus for manufacturing a product according to claim 7, further comprising a cutting state determination unit that determines whether or not the first member and the second member are separated from each other. The removing means has an adsorbing means for adsorbing and removing the second member;
The product according to claim 9 , wherein the cutting state determination unit determines that the first member and the second member are separated when an adsorption pressure of the second member by the adsorption unit does not change. Manufacturing equipment. 11. The pressing device according to claim 7 , further comprising a pressing unit configured to press a region corresponding to the second member excluding a region irradiated with the laser light before the laser light irradiation. Product manufacturing equipment. The product according to claim 7 , wherein the product is a secondary battery, and the first member is an electrode tab obtained by cutting out an electrode foil, which is a sheet-like member from the secondary battery, by laser cutting. An apparatus for manufacturing the product according to any one of the above. Irradiating the sheet-like member with laser light and cutting it into a first member that becomes a part of the product and a second member that becomes an unnecessary part (a);
(B) separating the first member and the second member by relatively moving the first member and the second member in a direction orthogonal to the plane of the sheet-like member;
Removing the second member (c);
Have
Said step (b) comprises:
Wherein the first member, the manufacturing method of the products it and moving in a direction perpendicular to the plane of the mass than the second member is heavy the product by the sheet member. The amount of movement when the first member is separated from the second member in the step (b) is the first member and the second member when the first member and the second member cannot be cut. 14. The method for producing a product according to claim 13 , wherein the members are within a range where the members are not broken. 15. The method of manufacturing a product according to claim 13 or 14 , further comprising a step (d) of determining whether the first member and the second member are separated from each other after the step (b). In the step (c), the second member is adsorbed and removed.
Said step (d) is as defined in claim 15, characterized in that it is determined that the suction pressure which is adsorbed the second member is apart the first member and the second member when no change Product manufacturing method. In the step (a), before the irradiation of the laser beam, any one of claims 13 to 16 wherein the laser beam is characterized by pressing the area corresponding to the second member except for the area to be irradiated The manufacturing method of the product described in one. 14. The product according to claim 13, wherein the product is a secondary battery, and an electrode foil that is the sheet-like member coming out of the secondary battery is cut into a shape of an electrode tab that becomes the first member by laser cutting. The manufacturing method of the product as described in any one of -17 .

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