Method for the repeated production of laminated bodies

Abstract

Method for the repeated production of laminated bodies (1, 1A), exhibiting: - Forming a respective laminated body (1, 1A) by laminating several electromagnetic steel plates (4, 6, 7) under a predetermined lamination condition; - Performing an annealing process on the laminated body (1, 1A); where: - the acquisition of laminate thickness information prior to annealing is carried out over a thickness of the respective laminated body (1, 1A) after lamination and prior to the execution of the annealing process on the respective laminated body (1, 1A); and - an adjustment of a lamination condition of the electromagnetic steel plates (4, 6, 7) is carried out before the annealing process for a subsequent laminated body (1, 1A) to be produced, such that the laminate thickness information before annealing of the subsequent laminated body (1, 1A) after the adjustment fulfills the criterion before annealing, if it is determined that the laminate thickness information of the respective laminated body (1, 1A) before annealing does not fulfill a criterion before annealing that is predetermined, - which shows the laminate thickness information before annealing: (i) a press condition information prior to annealing to indicate the thickness of the laminated body (1, 1A) in a state in which the laminated body (1, 1A) is pressed into a lamination direction of the electromagnetic steel plates (4, 6, 7), and (ii) has unloaded information prior to annealing to indicate the thickness of the laminated body (1, 1A) in a state in which the laminated body (1, 1A) is not pressed, - meets the criterion before glowing: (a) a press condition criterion prior to annealing and (b) an unbiased criterion before annealing, who are predetermined, and - in at least one corresponding case in which the pressing state information of the laminated body (1, 1A) does not meet the pressing state criterion before annealing, and in a corresponding case in which the unloaded state information of the laminated body (1, 1A) does not meet an unloaded state criterion before annealing, the lamination condition is set so that the pressing state information before annealing and the unloaded state information of the laminated body (1, 1A) before annealing each meet the pressing state criterion before annealing and the unloaded state criterion before annealing, respectively.

Description

Application area

[0001] The present invention relates to a method for the repeated production of laminated bodies. State of the art

[0002] Patent literature 1 discloses a method for producing an annealed laminated iron core, in which a laminated iron core is formed and annealed, such that the laminate thickness of the annealed laminated iron core is not greater than that of the laminated iron core before annealing. Citation list for patent literature

[0003] Patent literature 1: JP 2001- 338 825 A

[0004] The publication JP H04-276 019 A discloses a method for the stable annealing of laminated iron cores to prevent the production of defective products. The laminated iron cores are placed in an induction heating device in a secured position with blocks, bolts, and nuts for pressurization. The pressurization blocks, consisting of magnetic bodies, are located at both ends of the laminated iron cores. The blocks are secured with bolts and nuts for pressurization. The laminated iron cores are then housed in the induction heating device in this secured position. Subsequently, induction heating is performed on the laminated iron cores by energizing an induction coil. This stabilizes the laminated iron cores by heating them uniformly. The cores are annealed without producing defective products.

[0005] The publication JP S62-254646A describes a method for manufacturing a laminated core for a motor that allows for the reuse of the laminated core and prevents its loss. Core laminations stamped with a metal die are laminated and annealed. If the thickness of the laminated core falls below the specified values, an unannealed core is added. Several sheets of electromagnetic steel are stamped with a metal die, the specified number of sheets are laminated in the die, crimped, and annealed. This creates a laminated core for a rotating electric motor. If the thickness of the laminated core falls below the specified value, an unannealed core is added to restore the thickness to the specified value. In this design, the core with a thickness below the specified value is not scrapped but can be reused, thus preventing loss.

[0006] Document WO 2012 / 027 855 A2 concerns a method and a device for manufacturing a stack of sheet metal parts by the following steps: First, several sheet metal parts, which have an identical contour in at least one area, are stacked in a cavity of a tool, with thermally curing adhesive layers provided between the sheet metal parts. The sheet metal parts are then heated to cure the adhesive layers and form the stack of sheet metal parts. The contour of the tool cavity is precisely aligned with the contour of the sheet metal parts, at least in a portion of the area where the contours of the sheet metal parts are identical. Due to the material contact in this area, a majority of the energy required for heating the sheet metal parts is transferred through the tool to each individual sheet metal part, which in turn causes the adhesive layers to cure.The sheet metal parts are advantageously produced by stamping and inserted into the cavity against frictional resistance between the tool and the sheet metal part. In particular, a first fluid is introduced into the tool to introduce heat energy into the tool, which is in turn introduced into the sheet metal parts.

[0007] Document US 2018 / 0076700A1 discloses a method for manufacturing a rotor core with a plurality of stacked core elements, comprising determining weight imbalances of the plurality of core elements with respect to a central axis of the rotor core, combining the weight imbalances of the plurality of core elements to determine a weight distribution of the rotor core, and relocating the weight imbalances of one or more of the plurality of core elements to adjust a position of the weight distribution of the rotor core with respect to the central axis. Summary of the invention: Technical problem

[0008] An object of the present invention is to provide a method for the repeated production of laminated bodies which is effective in reducing a thickness defect rate after annealing a laminated body, an electromagnetic steel plate. Solution to the problem

[0009] The problem underlying the invention is solved according to the invention in a method for the repeated production of laminated bodies by the features of claim 1. Advantageous further developments are the subject of the respective dependent claims.

[0010] According to an illustrative aspect of the present invention, a method for the repeated production of laminated bodies comprises, among other things, laminating an electromagnetic steel plate to form a laminated body; performing an annealing process on the laminated body; acquiring pre-annealing laminate thickness information about a thickness of the laminated body before the annealing process is performed on the laminated body; and if the pre-annealing laminate thickness information does not meet a predetermined pre-annealing criterion, adjusting a lamination condition of the electromagnetic steel plate such that the pre-annealing laminate thickness information meets the pre-annealing criterion. Advantageous effects of the invention

[0011] According to the present invention, it is possible to provide a method for producing a laminated body which is effective in reducing a thickness defect rate after annealing a laminated body of an electromagnetic steel plate. Brief description of the drawings Fig. Figure 1 is a perspective view showing a laminated iron core. Fig. Figure 2 is a cross-sectional view showing a connection area between electromagnetic steel plates. Fig. Figure 3 is a schematic view showing a configuration of a laminate thickness manufacturing device. Fig. Figure 4 is a schematic view showing a configuration of a laminate thickness measuring device. Fig. Figure 5 is a schematic view representing a removal device. Fig. Figure 6 is a block diagram that represents a functional configuration of a control unit. Fig. Figure 7 is a block diagram that represents a hardware configuration of a control unit. Fig. Figure 8 is a flowchart that illustrates a lamination process. Fig. Figure 9 is a flowchart illustrating a laminate thickness testing procedure prior to annealing. Fig. Figure 10 is a flowchart illustrating a laminate thickness testing procedure during and after annealing. Description of the embodiments

[0012] The following sections describe embodiments in detail with reference to the drawings. In the description, the same elements or elements with the same functions are designated with the same reference numerals, and any repetitive descriptions are omitted. [Laminated body]

[0013] A laminated body 1A according to the present embodiment is a laminated iron core 1 for a motor or an intermediate product thereof in a manufacturing process. As in Fig. As shown in Figure 1, the laminated iron core 1 is, for example, a starter core of a motor and comprises an annular yoke 2 and a plurality of teeth 3. The plurality of teeth 3 are arranged at equal intervals along the yoke 2 and project from an inner circumferential surface of the yoke 2 to a center point of the yoke 2. The laminated iron core 1 is formed from the laminated body 1A by laminating a plurality of electromagnetic steel plates 4 perpendicular to a central axis of the yoke 2.

[0014] As in Fig. As shown in Figure 2, the laminated body 1A has a plurality of laminated blocks that overlap along the central axis of the yoke 2. Each of the laminated blocks 5 is a laminated body of a plurality of electromagnetic steel plates 4. The plurality of electromagnetic steel plates 4 of the laminated block 5 comprises a plurality of first electromagnetic steel plates 6 laminated one on top of the other, and a second electromagnetic steel plate 7 that is further laminated onto the plurality of first electromagnetic steel plates 6. The second electromagnetic steel plate 7 is arranged on an outermost layer (e.g., a bottom layer, as shown) of the laminated block 5.

[0015] The first electromagnetic steel plate 6 comprises a crimping area 6a. The crimping area 6a includes a recessed area 6d formed in a main surface 6b of the first electromagnetic steel plate 6, and a protruding area 6e formed on a main surface 6c of the first electromagnetic steel plate 6. The first electromagnetic steel plates 6 are laminated such that the main surfaces 6b and 6c face each other. At a boundary between the first electromagnetic steel plates 6, the protruding area 6e of one of the first electromagnetic steel plates 6 is fitted into the recessed area 6d of another first electromagnetic steel plate 6. Consequently, the first electromagnetic steel plates 6 are joined together.

[0016] The second electromagnetic steel plate 7 is obtained by modifying the crimping area 6a of the first electromagnetic steel plate 6 into a through-hole 7a. The second electromagnetic steel plate 7 is laminated to the first electromagnetic steel plate 6 on one side of its main surface 6c. At a boundary between the first electromagnetic steel plate 6 and the second electromagnetic steel plate 7, the protruding area 6e of the first electromagnetic steel plate 6 is fitted into the through-hole 7a of the second electromagnetic steel plate 7. Consequently, the first electromagnetic steel plate 6 and the second electromagnetic steel plate 7 are joined.

[0017] The second electromagnetic steel plate 7 prevents the laminated blocks 5 from being connected through the crimping area 6a. In particular, the second electromagnetic steel plate 7 prevents the protruding area 6e of one laminated block 5 from fitting into the recessed areas 6d of another laminated block 5 at a boundary between the laminated blocks 5. The majority of the laminated blocks 5 are fixed together by welding, gluing, or the like. The laminated iron core 1 is not necessarily a stator core and may be a rotor core. [Manufacturing device for a laminated body]

[0018] Next, a manufacturing device 10 for the laminated body 1A is described. As in Fig. Figure 3 shows that the manufacturing device 10 is a device that produces the laminated body A from a strip-shaped steel plate W1, which is a strip-shaped electromagnetic steel plate. The manufacturing device 10 comprises an unwinding device 20, a feeding device 30, a punching device 40, an annealing device 50, laminate thickness measuring devices 60A and 60B, conveyors 70A, 70B, 70C and 70D and a control unit 100.

[0019] The unwinding device 20 rotatably holds a wound body in a position where the wound body is mounted on the strip-shaped steel plate W1. The length of the strip-shaped steel plate W1 forming the wound body can be, for example, 500 m to 10,000 m. The thickness of the strip-shaped steel plate W1 forming the wound body can be approximately 0.1 mm to 0.5 mm. A thickness of the strip-shaped steel plate W1 can be approximately 0.1 mm to 0.3 mm to achieve better magnetic properties of the laminated iron core 1. The width of the strip-shaped steel plate W1 forming the wound body can be approximately 50 mm to 500 mm.

[0020] The feeding device 30 feeds the strip-shaped steel plate W1, which is drawn from the wound body, towards the punching device 40. The punching device 40 (laminating device) comprises a follower punch 41 and a press 42. The follower punch 41 is driven by the press 42 to perform a punching operation on the strip-shaped steel plate W1. Specifically, the follower punch 41 laminates a plurality of electromagnetic steel plates 4, obtained by punching, to form the laminated block 5, and this is repeated to form a plurality of laminated blocks 5, and the plurality of laminated blocks 5 are stacked along a lamination direction of the electromagnetic steel plates 4 to form the laminated body 1A.

[0021] The annealing device 50 is a device that performs an annealing process on the laminated body 1A formed by the punching device 40. For example, the annealing device 50 performs the annealing process after the laminated body 1A has been placed in a heating furnace set to an annealing temperature. The annealing device 50 can perform the annealing process on a stacking system by processing a predetermined number of the laminated bodies 1A together. For example, the annealing device 50 is configured to feed a predetermined number of laminated bodies 1A together into a heating furnace.

[0022] Laminate thickness measuring device 60A measures the laminate thickness of the laminated body 1A before the annealing process, which is to be carried out by the annealing device 50. Laminate thickness measuring device 60B measures the laminate thickness of the laminated body 1A after the annealing process, which is carried out by the annealing device 50.

[0023] As in Fig. As shown in Figure 4, the laminate thickness measuring devices 60A and 60B each comprise a pressure plate 620, a compression drive unit 610, and a plurality of (e.g., three or more) height sensors 630. The pressure plate 620 is arranged on the laminated body 1A to be measured. The compression drive unit 610 lowers the pressure plate 620 and presses it against the laminated body 1A. The compression drive unit 610 is a fluid-type cylinder, such as a hydraulic or pneumatic type, and comprises a downward-projecting compression rod 611. A tip end region of the compression rod 611 is connected to the pressure plate 620 via a movable joint 621. The movable joint 621 is, for example, For example, a ball joint allows the 620 press plate to tilt in all directions. In the case of fluid pressure, such as...With hydraulic or pneumatic pressure, the depressing drive part 610 lowers the depressing rod 611 to press the pressure plate 620 against the laminated body 1A.

[0024] The laminate thickness measuring devices 60A and 60B are designed to maintain a state between the pressing plate 620 being pressed by the pressing drive part 610 (hereinafter referred to as the "pressing state") and a state in which the pressing plate 620 is not being pressed by the pressing drive part 610 (hereinafter referred to as the "unloaded state"). Therefore, according to the laminate thickness measuring devices 60A and 60B, information about the thickness of the laminated body 1A in the pressing state (hereinafter referred to as "thickness in the pressing state") as well as information about the thickness of the laminated body 1A in the unloaded state (hereinafter referred to as "thickness in the unloaded state") can be acquired.A pressing force is set so that the difference in thickness before and after annealing is less than the difference in thickness before and after annealing in the unloaded state. The pressing force can be adjusted so that the thickness is essentially the same before and after annealing.

[0025] The majority of height sensors 630 are arranged, for example, around the central axis of the pressing rod 611. Each height sensor 630 causes, for example, a contact rod 631 to protrude downwards to contact the pressing plate 620 and detects the height of an upper surface of the pressing plate 620 based on the protruding length of the contact rod 631. By detecting the height of the upper surface of the pressing plate 620 with each height sensor 630, it is possible to derive the thickness of the laminated body 1A at a given position of each height sensor 630.

[0026] Back to Fig. 3. Conveyor 70A transports the laminated body 1A from the punching device 40 to the laminate thickness measuring device 60A. Conveyor 70B transports the laminated body 1A from the laminate thickness measuring device 60A to the annealing device 50. Conveyor 70C transports the laminated body 1A from the annealing device 50 to the laminate thickness measuring device 60B. Conveyor 70D further transports the laminated body 1A from the laminate thickness measuring device 60B to a return device. Specific examples of conveyors 70A, 70B, 70C, and 70D include a belt conveyor.

[0027] Conveyor 70B can operate in two conveying modes: a "normal mode" and a "removal mode." In normal mode, conveyor 70B conveys the laminated body 1A from the laminate thickness gauge 60A to the annealing device 50. In removal mode, conveyor 70B removes the laminated body 1A from the items being conveyed to the annealing device 50. Similarly, conveyor 70D can operate in two conveying modes: "normal mode" and "removal mode." In normal mode, conveyor 70D conveys the laminated body 1A from the laminate thickness gauge 60B to a return device. In removal mode, conveyor 70D removes the laminated body 1A from the items being conveyed to the return device.

[0028] For example, in Fig. As shown in Figure 5, the conveyors 70B and 70D comprise a removal device 710. The removal device 710 removes the laminated body 1A to be removed from the conveyors 70B and 70D. For example, the removal device 710 pushes the laminated body 1A to a collecting element 713 arranged around the conveyors 70B and 70D using an electric linear actuator, an air cylinder, or the like as a power source.

[0029] Next, a configuration of control unit 100 will be performed with reference to Fig. 6 described. The control unit 100 is configured to control the punching device 40 to laminate the electromagnetic steel plate 4 to form the laminated body 1A, to control the annealing device 50 to perform the annealing process on the laminated body 1A, to acquire the laminate thickness information before annealing from the laminate thickness measuring device 60A, and if the laminate thickness information before annealing does not meet a pre-defined pre-annealing criterion, to set a lamination condition for the electromagnetic steel plate 4 so that the laminate thickness information before annealing meets the pre-annealing criterion.The information about the thickness of the laminated body 1A includes information that directly specifies the thickness of the laminated body 1A, and information whose relationship to the thickness of the laminated body 1A is specified by a function, a table or the like.

[0030] The control unit 100 can further acquire laminate thickness information after annealing from the laminate thickness measuring device 60B about the thickness of the laminated body 1A on which the annealing process is carried out, and if the laminate thickness information after annealing does not meet a post-annealing criterion that is preset, the pre-annealing criterion is set so that the laminate thickness information after annealing meets the post-annealing criterion.

[0031] The control unit 100 can also set the lamination condition so that the laminate thickness information after annealing meets the criterion after annealing if the laminate thickness information before annealing of the laminated body 1A meets the criterion before annealing and the laminate thickness information after annealing of the laminated body 1A does not meet the criterion after annealing.

[0032] For example, the control unit 100 comprises as functional components (hereinafter referred to as "functional modules") a lamination condition holding unit 111, a mode holding unit 112, a lamination control unit 113, a transport control unit 114, a laminate thickness information acquisition unit 115, a lamination condition setting unit 116, a transport control unit 117, an annealing control unit 118, a transport control unit 119, a laminate thickness sensing unit 121, a lamination condition setting unit 122, a setting unit 123 for the pre-annealing criterion and a transport control unit 124.

[0033] The lamination condition holding unit 111 stores the lamination states of the first electromagnetic steel plate 6 and the second electromagnetic steel plate 7 for forming the laminated block 5. The lamination condition includes information that influences the laminate thickness of the laminated body 1A, such as the number of laminations of the electromagnetic steel plates 4 (the number of laminations of the first electromagnetic steel plate 6), the pressing force at the time of lamination of the electromagnetic steel plate 4, and the formation state of the crimping area 6a. The mode holding unit 112 stores the conveying modes described above, which are to be executed by the conveyor 70B.

[0034] The lamination control unit 113 controls the punching device 40 to laminate a plurality of electromagnetic steel plates 4 to form the laminated block 5, and to stack a plurality of laminated blocks 5 in the lamination direction of the electromagnetic steel plates 4 to form a laminated body 1A. At the time of forming the laminated block 5, the lamination control unit 113 controls the punching device 40 to laminate the electromagnetic steel plates 4 under a lamination condition according to the lamination condition in the lamination condition holding unit 111. In particular, the lamination control unit 113 controls the punching device 40 to laminate the first electromagnetic steel plates 6 onto a second electromagnetic steel plate 7 under a lamination condition according to the lamination condition of the lamination condition holding unit 111 to form the laminated block 5.The transport control unit 114 controls the conveyor 70A to transport the laminated body 1A from the punching device 40 to the laminate thickness measuring device 60A.

[0035] The laminate thickness information acquisition unit 115 acquires the laminate thickness information described above from the laminate thickness measuring device 60A before annealing the laminated body 1A. The laminate thickness information before annealing can include pre-annealing press-condition information, which indicates the thickness of the laminated body 1A in a state where the laminated body 1A is pressed in the lamination direction of the electromagnetic steel plate 4, and pre-annealing unloaded state information, which indicates the thickness of the laminated body 1A in a state where the laminated body 1A is not pressed. That is, the laminate thickness information acquisition unit 115 can acquire information about the thickness in the press-condition and information about the thickness in the unloaded state from the laminate thickness measuring device 60A.The information about the thickness in the pressing state is height information that is acquired by the majority of height sensors 630 in a state where the press plate 620 is pressed by the pressing drive part 610. The information about the thickness in the unloaded state is height information that is acquired by the majority of height sensors 630 in a state where the press plate 620 is not pressed by the pressing drive part 610.

[0036] If the laminate thickness information before annealing, acquired by the laminate thickness information acquisition unit 115, does not meet the predefined pre-annealing criterion, the lamination condition setting unit 116 changes the transport mode, stored in the mode hold unit 112, from normal mode to removal mode and sets the lamination condition for the electromagnetic plate 4 so that the laminate thickness information before annealing meets the pre-annealing criterion. The pre-annealing criterion is predefined based on, for example, a ratio between the laminate thickness information before annealing and the laminate thickness information after annealing acquired in the past.For example, the criterion is set before annealing such that the error rate of the laminate thickness information after annealing is significantly reduced for a group of laminated bodies 1A that meet the criterion, compared to the error rate of the laminate thickness information after annealing for a group of laminated bodies 1A that do not meet the criterion. The criterion before annealing can include a pre-stressed condition criterion and an unstressed pre-annealing criterion, which are predefined.

[0037] If at least one case occurs where the pre-annealing press condition information does not meet the pre-annealing press condition criterion, or where the pre-annealing unloaded state information does not meet the pre-annealing unloaded state criterion, the lamination condition setting unit 116 can adjust the lamination condition so that the pre-annealing press condition information and the pre-annealing unloaded state information each meet the pre-annealing press condition criterion and the pre-annealing unloaded state criterion, respectively. The pre-annealing press condition criterion can include a predefined lower limit for the pre-annealing press condition, and the pre-annealing unloaded state criterion can include a predefined upper limit for the unloaded state.The lamination condition setting unit 116 can adjust the lamination condition to increase the thickness of the laminate body 1A if the pre-annealing press condition information is lower than the lower limit for the pre-annealing press condition, and adjust the lamination condition to reduce the thickness of the laminated body 1A if the pre-annealing unstressed condition information is greater than the upper limit for the pre-annealing overloaded condition.

[0038] The pre-annealing press condition criterion may further include a predetermined upper limit for the pre-annealing press condition. The lamination condition setting unit 116 can adjust the lamination condition to reduce the thickness of the laminated body 1A, even if the pre-annealing press condition information is greater than the upper limit for the pre-annealing press condition. The lamination condition setting unit 116 cannot necessarily perform a lamination condition setting that corresponds to whether the pre-annealing press condition information is greater than the upper limit for the pre-annealing press condition. Additionally, the lamination condition setting unit 116 cannot perform a lamination condition setting that corresponds to whether the unloaded pre-annealing state information is lower than the predetermined lower limit.

[0039] After the lamination condition is set, the lamination condition setting unit 116 maintains the conveying mode of conveyor 70B in distance mode without further adjusting the lamination condition until the laminated body 1A formed after the setting is conveyed to the laminate thickness measuring device 60A. When the laminated body 1A formed after the lamination condition setting is conveyed to the laminate thickness measuring device 60A and the laminate thickness information before annealing of the laminated body 1A meets the pre-annealing criterion, the lamination condition setting unit 116 changes the conveying mode of conveyor 70B from distance mode back to normal mode.If the laminate thickness information before annealing of the laminated body 1A does not meet the pre-annealing criterion, the lamination condition setting unit 116 resets the lamination condition while the conveying mode of conveyor 70B is maintained in removal mode. Therefore, the conveying mode of conveyor 70B is maintained in removal mode after it has been determined that the laminate thickness information before annealing does not meet the pre-annealing criterion, until the laminate thickness information before annealing does meet the pre-annealing criterion.

[0040] The conveying control unit 117 controls the conveyor 70B to convey the laminated body 1A from the laminate thickness measuring device 60A to the annealing device 50 (hereinafter referred to as the "normal conveying control"). Furthermore, if the laminate thickness information prior to annealing of a laminated body 1A does not meet the pre-annealing criterion, the conveying control unit 117 controls the conveyor 70B to remove the laminated bodies 1A formed downstream of the laminated body 1A using the removal device 710 until the laminate thickness information prior to annealing meets the pre-annealing criterion (hereinafter referred to as the "removal control").For example, the conveying control unit 117 performs normal conveying control when conveyor 70B's conveying mode is normal mode, and performs distance control when conveyor 70B's conveying mode is distance mode. As described above, conveyor 70B's conveying mode remains in distance mode after it is determined that the pre-annealing laminate thickness information does not meet the pre-annealing criterion, until the pre-annealing laminate thickness information meets the pre-annealing criterion. Therefore, when distance control is performed while conveyor 70B's conveying mode is distance mode, distance mode continues until the pre-annealing laminate thickness information meets the pre-annealing criterion.

[0041] The annealing control unit 118 controls the annealing device 50 to perform an annealing process on the laminated body 1A. For example, the annealing control unit 118 controls the annealing device 50 to convey the laminated bodies 1A together into an annealing furnace at a time when a predetermined number of laminated bodies 1A are conveyed from the laminate thickness gauge 60A to the annealing device, and then to convey the laminated bodies out of the annealing furnace after a predetermined time has elapsed. The conveying control unit 119 controls the conveyor 70C to convey the laminated body 1A from the annealing device 50 to the laminate thickness gauge 60B.

[0042] The laminate thickness information acquisition unit 121 acquires the laminate thickness information after annealing the laminated body 1A from the laminate thickness measuring device 60B. The laminate thickness information after annealing can include press-condition information after annealing, which indicates the thickness of the laminated body 1A in a state where the laminated body 1A is pressed in the lamination direction of the electromagnetic steel plate 4, and unloaded-condition information after annealing, which indicates the thickness of the laminated body 1A in a state where the laminated body 1A is not pressed. That is, the laminate thickness information acquisition unit 121 can acquire information about the thickness in the press condition and information about the thickness in the unloaded condition from the laminate thickness measuring device 60B.

[0043] The lamination condition setting unit 122 sets the lamination condition so that the laminate thickness information after annealing meets the post-annealing criterion if the laminate thickness information before annealing of the laminated body 1A meets the pre-annealing criterion, and the laminate thickness information after annealing of the laminated body 1A does not meet the post-annealing criterion. As described above, if the laminate thickness information before annealing of a laminated body 1A does not meet the pre-annealing criterion, the conveying mode of the conveyor 70B is maintained in removal mode, and the laminated body 1A is removed by the removal device 710. This prevents the laminated body 1A from undergoing the processing that is to be carried out by the laminate thickness information acquisition unit 121 and the lamination condition setting unit 122.In other words, the acquisition of the laminate thickness information after annealing the laminated body 1A and the adjustment of the lamination number of the laminated electromagnetic steel plates 4, which corresponds to the acquisition, are carried out if the laminate thickness information before annealing meets the pre-annealing criterion.

[0044] The lamination condition setting unit 122 can perform a lamination condition setting corresponding to whether the unloaded state information after annealing meets a predetermined criterion, without performing a lamination condition setting corresponding to whether the press state information after annealing meets a predetermined criterion. The lamination condition setting unit 122 can perform a lamination condition setting corresponding to whether the unloaded state information after annealing the laminated body 1A is higher than a predetermined upper limit, without performing a lamination condition setting corresponding to whether the unloaded state information after annealing the laminated body 1A is lower than a predetermined lower limit.For example, the post-annealing criterion includes an upper limit for the unstressed post-annealing condition, which is predefined. The lamination condition setting unit 122 sets the lamination condition to reduce the thickness of the laminated body 1A if the pre-annealing unstressed condition information of the laminated body 1A is equal to or less than the upper limit for the pre-annealing unstressed condition, and the post-annealing unstressed condition information of the laminated body 1A is greater than the upper limit for the post-annealing unstressed condition. The upper limit for the post-annealing unstressed condition can be set to a value less than the upper limit for the post-annealing unstressed condition.

[0045] The lamination condition setting unit 122 can set the lamination condition or the lamination state if the error rate of the laminate thickness information after annealing in a plurality of laminated bodies 1A that were subjected to the annealing process together in the annealing device 50 exceeds a predetermined threshold. In this case, the error rate is the ratio of the number of laminated bodies 1A whose laminate thickness information does not meet the post-annealing criterion to the total number of laminated bodies 1A that were subjected to the annealing process together in the annealing device 50.

[0046] If the laminate thickness information after annealing does not meet the post-annealing criterion, the pre-annealing criterion setting unit 123 adjusts the pre-annealing criterion so that the laminate thickness information after annealing meets the post-annealing criterion. In a case where the unloaded state information after annealing is greater than the upper limit for the unloaded state after annealing, the pre-annealing criterion setting unit 123 can decrease the upper limit for the unloaded state before annealing.

[0047] If the laminate thickness information after annealing of the laminated body 1A meets the post-annealing criterion, the conveying control unit 124 controls the conveyor 70D to convey the laminated body 1A from the laminate thickness measuring device 60B to a return device. Conversely, if the laminate thickness information after annealing of the laminated body 1A does not meet the post-annealing criterion, the conveying control unit 124 controls the conveyor 70D to remove the laminated body 1A using the removal device 710.

[0048] The control unit 100 is equipped with one or more control computers. For example, the control unit 100 includes a circuit 190, as shown in Fig. Figure 7 illustrates the circuit 190, which comprises one or more processors 191, a memory 192, a storage medium 193, and an input / output port 194. The storage medium 193 is a computer-readable storage medium, such as a hard disk. The storage medium stores a program to cause the manufacturing device 10 to perform a manufacturing process for the laminated body 1A, which will be described later. The storage medium can be a removable medium, such as a non-volatile semiconductor memory, a magnetic disk, or an optical disk. The memory 192 temporarily stores a program loaded from the storage medium of the memory 193 and a calculation result performed by the processor 191. The processor 191 represents each of the functional modules described above by executing the program in conjunction with the memory 192.The input / output port 194 transmits electrical signals between the punching device 40, the annealing device 50, the laminate thickness gauges 60A and 60B, and the conveyors 70A, 70B, 70C, and 70D according to a command from the processor 191. It should be noted that the hardware configuration of the control unit 100 is not necessarily limited to one in which each function module is configured with a program. For example, each function module of the control unit 100 can be configured with a dedicated logic circuit and an application-specific integrated circuit (ASIC) into which the dedicated logic circuits are integrated. [Manufacturing process for a laminated body]

[0049] Next, a manufacturing process for the laminated body 1A, to be produced by the manufacturing device 10, is described as an example of a method for producing a laminated body. This manufacturing process includes laminating the electromagnetic steel plates 4 to form the laminated body 1A, performing the annealing process on the laminated body 1A, acquiring the laminate thickness information before annealing the thickness of the laminated body 1A, and, if the laminate thickness information before annealing does not meet the pre-set criterion, adjusting the lamination condition for the electromagnetic steel plate 4 so that the laminate thickness information before annealing meets the criterion.

[0050] This manufacturing process may further include acquiring the laminate thickness information before annealing via the thickness of the laminated body 1A, and, if the laminate thickness information before annealing does not meet the post-annealing criterion, adjusting the criterion before annealing so that the laminate thickness information after annealing meets the post-annealing criterion. This manufacturing process may further include adjusting the lamination condition if the laminate thickness information before annealing of the laminated body 1A does not meet the criterion before annealing and the laminate thickness information after annealing of the laminated body 1A does not meet the post-annealing criterion, so that the laminate thickness information after annealing meets the post-annealing criterion.The manufacturing process for laminated body 1A is divided below into a lamination process, a laminate thickness testing process before annealing, and a laminate thickness testing process after annealing, and each process is described in detail. [Lamination process]

[0051] The lamination process is a process for laminating a plurality of electromagnetic steel plates 4 to form the laminated block 5, and for stacking a plurality of laminated blocks 5 along the lamination direction of the electromagnetic steel plates 4 to form a laminated body 1A.

[0052] As in Fig. As shown in Figure 8, for example, the control unit 100 performs step S01. In step S01, the lamination control unit 113 checks whether an electromagnetic steel plate 4 (hereinafter referred to as "electromagnetic steel plate 4 to be punched out"), which is to be punched out of the strip-shaped steel plate W1 by the punching device 40, is a bottom layer of the laminated block 5 or not.

[0053] If, in step S01, it is determined that the electromagnetic steel plate 4 to be punched out is the bottom layer of the laminated block 5, the control unit 100 executes step S02. In step S02, the lamination control unit 113 controls the punching device 40 to punch out the second electromagnetic steel plate 7 from the strip-shaped steel plate W1.

[0054] If, in step S01, it is determined that the electromagnetic steel plate 4 to be punched out is not a bottom layer of the laminated block 5, the control unit 100 executes step S03. In step S03, the lamination control unit 113 controls the punching device 40 to punch out the first electromagnetic steel plate 6 from the strip-shaped steel plate W1 and to laminate the first electromagnetic steel plate 6 onto the previously punched electromagnetic steel plate 4.

[0055] After step S02 or step S03, the control unit 100 executes step S04. In step S04, the lamination control unit 113 checks whether the lamination of the electromagnetic steel plate 4 for a lamination quantity (hereinafter referred to as the "set quantity") contained in the lamination condition stored in the lamination condition holding unit 111 is complete. If step S04 determines that the lamination of the set quantity of electromagnetic steel plates 4 has not yet been completed, the control unit 100 returns to step S01. The control unit 100 then repeats steps S01 through S04 until the lamination of the set quantity of electromagnetic steel plates 4 is complete.

[0056] If step S04 determines that the lamination of the specified number of electromagnetic steel plates 4 is complete, the control unit 100 executes step S05. In step S05, the lamination control unit 113 checks whether the lamination of all laminated blocks 5 is complete. If step S05 determines that the lamination of all laminated blocks 5 is not yet complete, the control unit 100 returns to step S01. The control unit 100 then repeats steps S01 to S05 until the lamination of all laminated blocks 5 is complete.

[0057] When step S05 determines that the lamination of all laminated blocks 5 is complete, the control unit 100 executes steps S06 and S07. In step S06, the lamination control unit 113 controls the punching device 40 to transfer the laminated body 1A, formed by the lamination of the laminated blocks 5, to the conveyor 70A. In step S07, the conveying control unit 114 controls the conveyor 70A to convey the laminated body 1A from the punching device 40 to the laminate thickness measuring device 60A. The lamination process thus ends. The control unit 100 then repeats the above procedure. [Laminate thickness testing method before annealing]

[0058] The pre-annealing laminate thickness check method is a procedure for acquiring the pre-annealing laminate thickness information about the thickness of the laminated body 1A before the annealing process is carried out on the laminated body 1A. It is checked whether the pre-annealing laminate thickness information meets the pre-annealing criterion, and if the pre-annealing laminate thickness information meets the pre-annealing criterion, the laminated body 1A is conveyed to the annealing device 50. This procedure includes adjusting the lamination condition for the electromagnetic steel plate 4 so that the pre-annealing laminate thickness information meets the pre-annealing criterion. If the pre-annealing laminate thickness information does not meet the pre-annealing criterion, the procedure will be carried out accordingly.

[0059] As in Fig. As shown in Figure 9, the control unit 100 performs, for example, steps S11 and S12. In step S11, the laminate thickness information acquisition unit 115 acquires the laminate thickness information before annealing the laminate body 1A from the laminate thickness measuring device 60A. The laminate thickness information before annealing can include the press-condition information before annealing and the unloaded condition information before annealing. In step S12, the transport control unit 117 determines whether the transport mode, which is stored in the mode-holding unit 112, is in normal mode or not.

[0060] If step S12 determines that the transport mode is normal mode, the control unit 100 executes step S13. In step S13, the lamination condition setting unit 116 checks whether the laminate thickness information before annealing meets the pre-annealing criterion. For example, the lamination condition setting unit 116 checks whether the compression state information before annealing meets the pre-annealing compression state criterion, and whether the unloaded state information before annealing meets the unloaded state criterion. Specifically, the lamination condition setting unit 116 checks whether the compression state information before annealing is less than the lower limit of the pre-annealing compression state, and whether the unloaded state information before annealing is greater than the upper limit of the unloaded state before annealing.The lamination condition setting unit 116 can also check whether the pressing condition information before annealing is greater than the upper limit of the pressing condition before annealing or not.

[0061] If, in step S13, it is determined that the laminate thickness information before annealing does not meet the pre-annealing criterion, the control unit 100 executes steps S14 and S15. In step S14, the lamination condition setting unit 116 changes the transport mode, which is stored in the mode hold unit 112, from normal mode to removal mode. In step S15, the lamination condition setting unit 116 sets the lamination condition for the electromagnetic steel plate 4 so that the lamination thickness information before annealing meets the pre-annealing criterion. For example, the lamination condition setting unit 116 sets the lamination condition so that the pre-annealing press state information and the pre-annealing unloaded state information meet the pre-annealing press state criterion and the pre-annealing unloaded state criterion, respectively.In particular, the lamination condition setting unit 116 adjusts the lamination condition to increase the thickness of the laminated body 1A when the pre-annealing press condition information is less than the lower limit of the pre-annealing press condition, and adjusts the lamination condition to reduce the thickness of the laminated body 1A when the pre-annealing unloaded state information is greater than the upper limit of the pre-annealing unloaded state. The lamination condition setting unit 116 can also adjust the lamination condition to reduce the thickness of the laminated body 1A when the pre-annealing press condition information is greater than the upper limit of the pre-annealing press condition.

[0062] If step S12 determines that the conveying mode is not the normal mode, the control unit 100 executes step S16. In step S16, the lamination condition setting unit 116 determines whether the laminated body 1A to be measured for the laminate thickness information before annealing is a laminated body 1A formed after the lamination condition has been set.

[0063] If, in step S16, it is determined that the laminated body 1A to be measured for the laminate thickness information before annealing is a laminated body 1A formed after the lamination condition has been set, the control unit 100 executes step S17. In step S17, the lamination condition setting unit 116 determines whether the laminate thickness information before annealing, which is acquired by the laminate thickness information acquisition unit 115 in step S11, meets the criterion of being before annealing or not.

[0064] If, in step S17, it is determined that the laminate thickness information before annealing meets the pre-annealing criterion, the control unit 100 executes step S18. In step S18, the lamination condition setting unit 116 changes the transport mode, which is stored in the mode holding unit 112, from removal mode to normal mode.

[0065] If, in step S17, it is determined that the laminate thickness information before annealing does not meet the pre-annealing criterion, the control unit 100 switches the sequence to step S15. In this case, the lamination condition setting unit 116 re-executes the setting of the lamination condition / lamination status in step S15, while the transport mode, which is stored in the mode hold unit 112, is maintained in removal mode.

[0066] After executing step S15 or S18, the control unit 100 executes step S19. If, in step S13, it is determined that the laminate thickness information before annealing meets the pre-annealing criterion, the control unit 100 skips steps S14 and S15 and executes step S19. If, in step S16, it is determined that the laminated body 1A to be measured for the laminate thickness information before annealing is not a laminated body 1A formed after the lamination condition has been set, the control unit 100 skips steps S17 and S18 and executes step S19. In step S19, the transport control unit 117 determines whether the transport mode stored in the mode-hold unit 112 is the normal mode or not.

[0067] If step S19 determines that the conveying mode is normal mode, the control unit 100 executes step S21. In step S21, the conveying control unit 117 controls the conveyor 70B to convey the laminated body 1A from the laminate thickness measuring device 60A to the annealing device 50.

[0068] If step S19 determines that the conveying mode is not normal mode, the control unit 100 executes step S22. In step S22, the conveying control unit 117 controls the conveyor 70B to remove the laminated body 1A using the removal device 710. This completes the laminate thickness testing procedure before annealing. The control unit 100 then repeats the above procedure. [Laminate thickness testing method during and after annealing]

[0069] The laminate thickness test method during and after annealing is a method for performing the annealing process of the laminated body 1A, for acquiring the laminate thickness information after annealing, and for verifying whether the laminate thickness information after annealing meets the post-annealing criterion. This method may include adjusting the criterion before annealing so that the laminate thickness information after annealing meets the post-annealing criterion if it does not.

[0070] As in Fig.As shown in Figure 10, the control unit 100, for example, executes steps S31 and S32. In step S31, the annealing control unit 118 waits for a predetermined number of laminated bodies 1A to be conveyed from the laminate thickness measuring device 60A to the annealing device 50. In step S32, the annealing control unit 118 controls the annealing device 50 to convey the predetermined number of laminated bodies 1A together into an annealing furnace and to convey the predetermined number of laminated bodies 1A out of the annealing furnace after a predetermined time has elapsed.

[0071] Next, the control unit 100 executes steps S33, S34, and S35. In step S33, the conveying control unit 119 controls the conveyor 70C to convey the laminated body 1A from the annealing device 50 to the laminate thickness measuring device 60B. In step S34, the laminate thickness information acquisition unit 121 acquires the laminate thickness information after annealing the laminated body 1A from the laminate thickness measuring device 60B. The laminate thickness information after annealing can include the press-condition information after annealing and the unloaded condition information after annealing. In step S35, the pre-annealing criterion setting unit 123 checks whether the laminate thickness information after annealing meets the post-annealing criterion.For example, the setting unit 123 checks for the criterion before annealing whether the unloaded state information after annealing is greater than the upper limit of the unloaded state after annealing or not.

[0072] If, in step S35, it is determined that the laminate thickness information after annealing meets the post-annealing criterion, the control unit 100 executes step S36. In step S36, the conveying control unit 124 controls the conveyor 70D to convey the laminated body 1A from the laminate thicknessing device 60B to a return device.

[0073] If, in step S35, it is determined that the laminate thickness information after annealing does not meet the post-annealing criterion, the control unit 100 executes step S37. In step S37, the conveying control unit 124 controls the conveyor 70D to remove the laminated body 1A using the removal device 710.

[0074] After executing step S36 or S37, the control unit 100 executes step S38. In step S38, the setting unit 123 checks, for the pre-annealing criterion, whether the acquisition of the laminate thickness information after annealing is complete for all laminated bodies 1A undergoing the annealing process together in the annealing device 50. If step S38 determines that the acquisition of the laminate thickness information after annealing is not complete for all laminated bodies 1A, the control unit 100 returns to step S33. The control unit 100 then repeats steps S33 through S38 until the acquisition of the laminate thickness information after annealing is complete for all laminated bodies 1A undergoing the annealing process together in the annealing device 50.

[0075] If, in step S38, it is determined that the acquisition of laminate thickness information after annealing is complete for the total number of laminated bodies 1A, the control unit 100 executes step S39. In step S39, the setting unit 123 checks for the pre-annealing criterion whether the error rate is equal to or less than a permissible value.

[0076] If step S39 determines that the defect rate exceeds the permissible value, the control unit 100 executes steps S41 and S42. In step S41, the pre-anneal criterion setting unit 123 adjusts the pre-anneal criterion so that the laminate thickness information after annealing meets the post-anneal criterion. For example, the pre-anneal criterion setting unit 123 reduces the upper limit of the unloaded pre-anneal state if the unloaded post-anneal state information is greater than the upper limit of the unloaded post-anneal state. The pre-anneal criterion setting unit 123 can adjust the pre-anneal criterion so that the defect rate is equal to or less than the permissible value. In step S42, the lamination condition setting unit 122 sets the lamination condition so that the laminate thickness information after annealing meets the criterion after annealing.For example, the lamination condition setting unit 122 adjusts the lamination condition to reduce the thickness of the laminated body 1A if the unloaded state information after annealing is greater than the upper limit of the unloaded state after annealing. If step S39 determines that the defect rate is equal to or less than the allowable value, the control unit 100 skips steps S41 and S42. Thus, the laminate thickness check procedure ends during and after annealing. The control unit 100 then repeats the above sequence. [Effect of the present embodiment]

[0077] As described above, the process for manufacturing the laminated body 1A includes laminating the electromagnetic steel plate 4 to form the laminated body 1A, performing the annealing process on the laminated body 1A, acquiring the laminate thickness information before annealing the thickness of the laminated body 1A, and, if the laminate thickness information before annealing does not meet the pre-set criterion, adjusting the lamination condition for the electromagnetic steel plate 4 so that the laminate thickness information before annealing meets the pre-set criterion.

[0078] There is a certain degree of correlation between the pre-annealing thickness and the post-annealing thickness of the laminated body 1A. This allows the post-annealing thickness error rate to be reduced by adjusting the pre-annealing thickness. Consequently, the manufacturing process for reducing the post-annealing thickness error rate of the laminated body 1A of the electromagnetic steel plates 4 involves adjusting the lamination conditions for the electromagnetic steel plate 4 so that the laminate thickness information before annealing meets the pre-annealing criterion.

[0079] If a thickness defect occurs in laminated body 1A after annealing and the laminated body 1A is discarded, not only is material from the laminated body 1A wasted, but also the heat energy required for annealing the laminated body 1A. If the annealing process is carried out in batch processing, where multiple laminated bodies 1A are processed simultaneously, the waste described above is even greater. Conversely, reducing the thickness defect rate after annealing the laminated body 1A can improve the efficiency of its production.

[0080] The laminate thickness information before annealing can include the press-condition information before annealing, which specifies the thickness of the laminated body 1A in a state where the laminated body 1A is pressed in the lamination direction of the electromagnetic steel plate 4, and the unloaded state information before annealing, which specifies the thickness of the laminated body 1A in a state where the laminated body 1A is not pressed. The criterion before annealing can include the press-condition criterion before annealing and the unloaded state criterion before annealing, which are predetermined.If it falls into at least one case where the press state information before annealing does not meet the press state criterion before annealing, and into a case where the unloaded state information before annealing does not meet the unloaded state criterion before annealing, the lamination condition can be set so that the press state information before annealing and the unloaded state information before annealing each meet the press state criterion before annealing and the unloaded state criterion before annealing, respectively.

[0081] For the laminated body 1A of the electromagnetic steel plate 4, it may be necessary to adjust both the thickness of the laminated body 1A in a compressed state and the thickness of the laminated body 1A in an unloaded state to a desired condition. For example, the thickness of the laminated body 1A in a compressed state may need to be within a desired range to stabilize performance when used as the electromagnetic core of an electric motor. Furthermore, to improve ease of installation in the electric motor, it may be necessary to define the thickness of the laminated body 1A in an unloaded state within a desired range.By adjusting the lamination condition so that the press-condition information before annealing and the unloaded condition information before annealing each meet the press-condition criterion before annealing and the unloaded condition criterion before annealing respectively, error rates of both the thickness of the laminated body 1A in a press-condition after annealing and the thickness of the laminated body 1A in an unloaded condition after annealing can be reduced.

[0082] The pre-annealing press condition criterion can include the lower limit of the pre-annealing press condition, which is predefined, and the pre-annealing unloaded state criterion can include the upper limit of the pre-annealing unloaded state, which is preset. The lamination condition can be adjusted to increase the thickness of the laminated body 1A if the pre-annealing press condition information is less than the lower limit of the pre-annealing press condition, and conversely, to decrease the thickness of the laminated body 1A if the pre-annealing unloaded state information is greater than the upper limit of the pre-annealing unloaded state. This prevents the thickness of the laminated body 1A from being too small in the post-annealing press condition. Consequently, its performance as an electric motor with an electromagnetic core can be improved.Furthermore, this prevents the thickness of the laminated body 1A from being excessively large in the unloaded state after annealing. Consequently, the ease of installation in the electric motor can be improved.

[0083] The pressing condition criterion before annealing can include the upper limit of the pressing condition before annealing, which is preset, and the lamination condition can be set to reduce the thickness of the laminated body 1A, even if the pressing condition information before annealing is higher than the upper limit of the pressing condition before annealing. In this case, the performance as an electric motor of an electromagnetic core can be further stabilized.

[0084] The method for producing the laminated body 1A may further include acquiring the laminate thickness information after annealing the thickness of the laminated body 1A after the annealing process has been carried out on the laminated body 1A, and if the laminate thickness information after annealing does not meet the post-annealing criterion, adjusting the pre-annealing criterion so that the laminate thickness information after annealing meets the post-annealing criterion. The laminate thickness information after annealing may include the unloaded post-annealing state information, which indicates the thickness of the laminated body 1A in a state where it is not being pressed, and the post-annealing criterion may include the upper limit of the unloaded post-annealing state, which is preset.If the unloaded state information after annealing is higher than the upper limit of the unloaded state after annealing, the upper limit of the unloaded state before annealing can be reduced. In this case, the thickness error rate after annealing of laminated body 1A can be further reduced by adjusting the upper limit of the unloaded state before annealing according to the actual implementation of the unloaded state information after annealing.

[0085] The process for producing the laminated body 1A can further include adjusting the lamination condition to reduce the thickness of the laminated body 1A if the unstressed state information before annealing of the laminated body 1A is equal to or lower than the upper limit of the unstressed state before annealing, and the unstressed state information after annealing of the laminated body 1A is higher than the upper limit of the unstressed state after annealing. In this case, the thickness error rate after annealing of the laminated body 1A can be further reduced by reflecting the unstressed state information after annealing in the lamination condition instead of the unstressed state information before annealing.

[0086] The process for manufacturing laminated body 1A may further include acquiring the post-anneal laminate thickness information about the thickness of laminated body 1A after the annealing process has been performed on the laminated body 1A, and, if the post-anneal laminate thickness information does not meet the pre-defined post-anneal criterion, adjusting the pre-anneal criterion so that the post-anneal laminate thickness information meets the post-anneal criterion. In this case, the error rate of the post-anneal thickness of laminated body 1A can be further reduced by adjusting the pre-anneal criterion according to the actual performance of the unloaded post-anneal state information.

[0087] The process for producing the laminated body 1A can further include adjusting the lamination condition if the laminate thickness information before annealing of the laminated body 1A meets the pre-annealing criterion and the laminate thickness information after annealing of the laminated body 1A does not meet the post-annealing criterion, such that the laminate thickness information after annealing meets the post-annealing criterion. In this case, the error rate of the thickness after annealing of the laminated body 1A can further be reduced by reflecting the unstressed state information after annealing under the lamination condition instead of the unstressed state information before annealing. Industrial applicability

[0088] The method for producing a laminated body according to the present disclosure is effective in reducing a thickness defect rate after annealing a laminated body of electromagnetic steel plates. Reference symbol list 1A laminated body 4 electromagnetic steel plates

Claims

[1] Method for the repeated production of laminated bodies (1, 1A), exhibiting: - Forming a respective laminated body (1, 1A) by laminating several electromagnetic steel plates (4, 6, 7) under a predetermined lamination condition; - Performing an annealing process on the laminated body (1, 1A); where: - the acquisition of laminate thickness information prior to annealing is carried out over a thickness of the respective laminated body (1, 1A) after lamination and prior to the execution of the annealing process on the respective laminated body (1, 1A); and - an adjustment of a lamination condition of the electromagnetic steel plates (4, 6, 7) is carried out before the annealing process for a subsequent laminated body (1, 1A) to be produced, such that the laminate thickness information before annealing of the subsequent laminated body (1, 1A) after the adjustment fulfills the criterion before annealing, if it is determined that the laminate thickness information of the respective laminated body (1, 1A) before annealing does not fulfill a criterion before annealing that is predetermined, - which shows the laminate thickness information before annealing: (i) a press condition information prior to annealing to indicate the thickness of the laminated body (1, 1A) in a state in which the laminated body (1, 1A) is pressed into a lamination direction of the electromagnetic steel plates (4, 6, 7), and (ii) has unloaded information prior to annealing to indicate the thickness of the laminated body (1, 1A) in a state in which the laminated body (1, 1A) is not pressed, - meets the criterion before glowing: (a) a press condition criterion prior to annealing and (b) an unbiased criterion before annealing, who are predetermined, and - in at least one corresponding case in which the pressing state information of the laminated body (1, 1A) does not meet the pressing state criterion before annealing, and in a corresponding case in which the unloaded state information of the laminated body (1, 1A) does not meet an unloaded state criterion before annealing, the lamination condition is set so that the pressing state information before annealing and the unloaded state information of the laminated body (1, 1A) before annealing each meet the pressing state criterion before annealing and the unloaded state criterion before annealing, respectively. [2] Method according to claim 1, wherein: - the press condition criterion before annealing has a lower limit of the press condition before annealing, which is predetermined, and the unloaded condition criterion before annealing has an upper limit of the unloaded condition before annealing, which is predetermined, - if the pressing condition information of the laminated body (1, 1A) before annealing is less than the lower limit of the pressing condition before annealing, the lamination condition is adjusted to increase the thickness of the subsequent laminated body (1, 1A); and - if the unloaded state information of the laminated body (1, 1A) before annealing is higher than the upper limit of the unloaded state before annealing, the lamination condition is adjusted to reduce the thickness of the subsequent laminated body (1, 1A). [3] Method according to claim 2, wherein: - the pressing condition criterion before annealing furthermore has an upper limit of the pressing condition before annealing, which is predetermined, and - even if the pressing condition information of the laminated body (1, 1A) before annealing is higher than the upper limit of the pressing condition before annealing, the lamination condition is adjusted to reduce the thickness of the subsequent laminated body (1, 1A). [4] Method according to claim 2 or 3, further comprising: - Acquiring laminate thickness information after annealing via the thickness of the laminated body (1, 1A); and - Setting the criterion before annealing such that the laminate thickness information after annealing of the subsequent laminated body (1, 1 A), which satisfies the criterion before annealing, satisfies the criterion after annealing if the laminate thickness information after annealing does not satisfy a criterion after annealing that is predetermined, wherein: - the laminate thickness information after annealing includes an unloaded state information after annealing to indicate the thickness of the laminated body (1, 1A) in the state in which the laminated body (1, 1A) is not pressed, - the criterion after annealing has an upper limit of the unstressed state after annealing, which is predetermined, and - if the unloaded state information after annealing is greater than the upper limit of the unloaded state after annealing, the upper limit of the unloaded state before annealing is reduced. [5] Method according to claim 4, further comprising adjusting the lamination condition to reduce the thickness of the subsequent laminated body (1, 1A) if the unloaded state information before annealing the laminated body (1, 1A) is equal to or lower than the upper limit of the unloaded state before annealing and if the unloaded state information after annealing the laminated body (1, 1A) is greater than the upper limit of the unloaded state after annealing. [6] Method according to claim 1, further comprising: - Acquiring laminate thickness information after annealing via the thickness of the laminated body (1, 1A); and - Setting the criterion before annealing such that the laminate thickness information of a subsequent laminated body (1, 1 A) which satisfies the criterion before annealing satisfies the criterion after annealing if the laminate thickness information after annealing does not satisfy a criterion after annealing that is predetermined. [7] Method according to claim 6, further comprising adjusting the lamination condition such that the laminate thickness information of the subsequent laminated body (1, 1A) after annealing meets the criterion after annealing if the laminate thickness information before annealing of the laminated body (1, 1A) meets the criterion before annealing and the laminate thickness information after annealing of the laminated body (1, 1A) does not meet the criterion after annealing.

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