Progressive die and processing method using the same

Abstract

[Task] In a continuous die, the displacement of a strip-shaped thin steel sheet due to its own weight can be controlled or adjusted regardless of the size of the width of the strip-shaped thin steel sheet. [Solution] A continuous die (1) has an upper die (3) and a lower die (4), and a work table for processing a strip-shaped thin steel sheet (F) includes side guides (61A, 61B) that guide the side portions of one side of the strip-shaped thin steel sheet (F) in a conveying direction, and lifters (63A, 63B) that are respectively arranged corresponding to the side guides (61A, 61B), lift the strip-shaped thin steel sheet (F), and have a push portion (79A, 79B) that pushes the lower surface of the strip-shaped thin steel sheet (F), each side guide (61A, 61B) has an abutting portion (70A, 70B) that abuts against the upper surface of the strip-shaped thin steel sheet (F), the abutting portion (70A, 70B) is arranged so as to sandwich the push portion (79A, 79B) in the conveying direction, and is located below the advancing position of the respective push portion (79A, 79B).

Description

Technical Field

[0001] The present invention relates to a progressive die for punching out sheet metal from an intermittently conveyed strip of thin steel sheet, and a processing method using the progressive die. Background Technology

[0002] Conventionally, progressive dies are known as manufacturing apparatuses for laminated cores used in motors and the like. These progressive dies have multiple worktables that sequentially process strips of thin steel sheet (strip steel) made of electromagnetic steel. At each worktable, punching of guide holes (positioning holes), punching of internal shapes (internal shapes of grooves, teeth, etc.), formation of riveting parts, and application of adhesive are performed as needed. Thus, the shapes of the individual sheets constituting the laminated core are continuously formed within the strip steel sheet being conveyed in the progressive die. Finally, the sheets, whose shapes have been punched from the strip steel sheet, are fixed in the progressive die in a predetermined number of stacked sheets, thereby completing the laminated core. However, it is also possible to manufacture each sheet independently in the progressive die and then fix these sheets in a predetermined number of stacked sheets outside the progressive die.

[0003] When conveying a strip of thin steel sheet in a progressive die, the displacement (or deformation) caused by the weight (gravity) of the strip of thin steel sheet must be properly controlled or adjusted to avoid interference with the periphery of the progressive die (i.e., accidental contact or friction, etc.).

[0004] On the other hand, in the manufacture of laminated iron cores using progressive dies, from the viewpoint of raw material yield, it is preferable to further reduce the amount of residual material after the sheet metal is punched out. If the proportion of the portion corresponding to the sheet metal in the strip steel sheet is increased in order to reduce residual material, the rigidity of the residual material will decrease, and displacement caused by the weight of the residual material will easily occur (and consequently, interference with the periphery of the progressive die). In particular, if the width of the strip steel sheet is increased, this displacement due to its own weight will be more likely to occur.

[0005] As a technique for stably conveying strips of thin steel sheets, for example, there is a known technique that uses a conveying guide device, which includes: a sliding unit having a sliding member configured to move in a direction perpendicular to the conveying direction of the strip of thin steel sheet, and using the sliding member to support the side of the strip of thin steel sheet; and a drive mechanism that causes the sliding member to move in the vertical direction (see Patent Document 1).

[0006] In this prior art, the two sides of the strip of thin steel sheet (the two ends in the direction perpendicular to the conveying direction) are pressed by a pair of sliding members. As a result, the strip of thin steel sheet becomes a ring-shaped structure that flexes upwards and flexes into a mountain shape in its width direction.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2012-143793 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] In the prior art described in Patent Document 1, the distance between the pairs of sliding members is equivalent to the width of the strip of thin steel plate, so the area pressed by the sliding members (i.e., the area flexed into a mountain shape) is affected by the width of the strip of thin steel plate.

[0012] Therefore, in the prior art, if the width of the strip steel sheet increases, depending on the rigidity of the strip steel sheet, it may be difficult to deform the strip steel sheet into the desired shape (i.e., it is difficult to properly control or adjust the displacement caused by the self-weight of the strip steel sheet).

[0013] In view of the above background, the objective of the present invention is to provide a progressive die that can control or adjust the displacement caused by the weight of the thin strip steel sheet regardless of the width of the strip steel sheet, and a processing method using the progressive die.

[0014] Methods for solving problems

[0015] To address the aforementioned issues, one aspect of the present invention is a progressive die for punching thin sheets from an intermittently conveyed strip of thin steel sheet. The progressive die is configured with multiple worktables, each worktable processing a portion of the strip of thin steel sheet corresponding to a specific thin sheet. The progressive die includes an upper die and a lower die, which clamp the strip of thin steel sheet being processed on the multiple worktables. At least one of the multiple worktables includes: a first side guide and a second side guide, spaced apart from each other in the conveying direction of the strip of thin steel sheet, guiding a side portion of one side of the strip of thin steel sheet; and a first lifter and a second lifter, respectively connected to the... The first and second side guides are configured correspondingly to lift the strip of thin steel plate. The first and second lifters have a first pressing portion and a second pressing portion that respectively press against the lower surface of the strip of thin steel plate. The first pressing portion and the second pressing portion are each movable between an upward advancing position and a downward retreating position. The first and second side guides have a first abutting portion and a second abutting portion that respectively abut against the upper surface of the strip of thin steel plate. The first abutting portion and the second abutting portion are configured to sandwich the first pressing portion and the second pressing portion in the conveying direction and are located below the forward position of their respective first pressing portion or second pressing portion.

[0016] According to this method, the displacement caused by the self-weight of the strip sheet (i.e., the separation distance from the upper surface of the lower die) can be controlled or adjusted regardless of the reduction in the rigidity of the strip sheet.

[0017] In the above manner, it is preferable that the distance between the first side guide and the second side guide is less than the width of the strip-shaped thin steel plate.

[0018] According to this method, the displacement caused by the self-weight of the strip steel sheet (i.e., the separation distance from the upper surface of the die for forming the shape) can be controlled or adjusted more stably.

[0019] In the above-described manner, preferably, the portions of the strip-shaped thin steel sheet corresponding to the sheets arranged in the conveying direction are arranged in two rows. The at least one worktable includes: a third side guide and a fourth side guide, which are arranged at intervals from each other in the conveying direction to guide the other side of the strip-shaped thin steel sheet; and a third lifter and a fourth lifter, which are respectively arranged corresponding to the third side guide and the fourth side guide to lift the strip-shaped thin steel sheet. The third lifter and the fourth lifter have the function of respectively pushing the... The lower surface of the strip-shaped thin steel sheet has a third pressing portion and a fourth pressing portion, each of which is movable between an upward advancing position and a downward retreating position. The third side guide and the fourth side guide have a third abutting portion and a fourth abutting portion respectively abutting against the upper surface of the strip-shaped thin steel sheet. The third abutting portion and the fourth abutting portion are configured to sandwich the third pressing portion and the fourth pressing portion in the conveying direction and are located below the advancing position of their respective third abutting portion or fourth abutting portion.

[0020] According to this method, even when two rows of thin sheets are punched from a strip of thin steel sheet, the displacement caused by the weight of the strip of thin steel sheet can be controlled or adjusted more stably.

[0021] In the above manner, preferably, the first side guide and the second side guide each have a guide wall, which is located above the pushing part of the corresponding first or second lifter.

[0022] According to this method, the strip of thin steel plate that is pushed down by the first and second lifters can be stably guided.

[0023] In the above manner, preferably, the at least one worktable is a shape punching worktable for processing the shape of the sheet from the strip of thin steel plate, the shape punching worktable including: a shape punching punch disposed on the upper die; and a shape punching die disposed on the lower die, having an opening for inserting the shape punching punch.

[0024] According to this method, the displacement caused by the self-weight of the strip steel sheet (i.e., the separation distance from the upper surface of the die for shaping) can be controlled or adjusted, thus easily avoiding interference between the strip steel sheet and the die for shaping.

[0025] In the above manner, preferably, when viewed from a direction perpendicular to the strip of thin steel sheet, the first and second lifters have a first inclined surface, which is arranged along the tangent direction at a predetermined position on the periphery of the opening in the die for shaping.

[0026] Therefore, the first and second lifters can be configured closer to the die for forming the shape, thus enabling more reliable control or adjustment of the displacement caused by the weight of the strip of thin steel plate located above the die for forming the shape.

[0027] In the above-described manner, preferably, the plurality of worktables further includes an empty worktable located downstream of the profile punching worktable in the conveying direction, which does not process the portions corresponding to each of the thin plates. The empty worktable also includes a plurality of fifth lifters arranged at intervals in the width direction of the strip of thin steel sheet. Each of the fifth lifters has a fifth pressing part that presses against the lower surface of the strip of thin steel sheet. Each of the fifth pressing parts is movable between an upward advancing position and a downward retreating position.

[0028] According to this method, the displacement caused by the self-weight of the strip sheet (i.e., the remaining material with the lowest rigidity) on the downstream side of the shape blanking worktable can be controlled or adjusted, thus avoiding interference between the strip sheet and the periphery of the progressive die.

[0029] In the above-described manner, preferably, the empty worktable further includes a central guide member, which is disposed downstream of the plurality of fifth lifters in the conveying direction and slides in contact with the upper surface of the strip-shaped thin steel plate. The central guide member has a fifth abutting portion that abuts against the upper surface of the strip-shaped thin steel plate, and the fifth abutting portion is located below the forward position of the fifth pushing portion of each of the fifth lifters.

[0030] According to this method, the displacement of the strip sheet (i.e., the remaining material with the lowest rigidity) on the downstream side of the profile blanking worktable due to its own weight can be controlled or adjusted more reliably, thus more reliably avoiding interference between the strip sheet and the periphery of the progressive die.

[0031] In the above-described manner, preferably, the at least one workbench is an adhesive coating workbench for coating adhesive on the portions corresponding to each of the thin plates. The adhesive coating workbench includes an adhesive coating device disposed on the lower mold, which coats the adhesive on the portions corresponding to each of the thin plates.

[0032] According to this embodiment, the displacement caused by the weight of the strip steel sheet (i.e., the separation distance from the upper surface of the adhesive coating device) can be controlled or adjusted, thus easily avoiding interference between the strip steel sheet and the adhesive coating device.

[0033] In the above manner, it is preferred that the pushing portion of each of the first and second lifters has a second inclined surface that slopes upward from the lower side toward the conveying direction.

[0034] According to this method, the smooth movement of the strip steel sheet in the forward conveying direction can be avoided from being hindered by the pushing parts of the first and second elevators.

[0035] To address the aforementioned problem, one aspect of the present invention is a processing method using a progressive die for punching sheet metal from an intermittently conveyed strip of thin steel sheet. The progressive die includes multiple worktables for processing portions of the strip of thin steel sheet corresponding to each sheet metal. The progressive die comprises an upper die and a lower die, which clamp the strip of thin steel sheet being processed on the multiple worktables. Regarding at least one of the multiple worktables, a first side guide and a second side guide, spaced apart from each other in the conveying direction of the strip of thin steel sheet, guide one side portion of the strip of thin steel sheet. A first lifter and a second lifter, respectively arranged corresponding to the first and second side guides, are used to further guide the strip of thin steel sheet. The device lifts the strip of thin steel sheet. The first and second lifting devices have a first pressing portion and a second pressing portion that respectively press against the lower surface of the strip of thin steel sheet. The first pressing portion and the second pressing portion are each movable between an upward advancing position and a downward retreating position. The first side guide and the second side guide have a first abutting portion and a second abutting portion that respectively abut against the upper surface of the strip of thin steel sheet. The first abutting portion and the second abutting portion are configured to sandwich the first pressing portion and the second pressing portion in the conveying direction. When conveying the strip of thin steel sheet, in order to place the abutting portion below the advancing position of the corresponding first pressing portion or the second pressing portion, the pressing portion is moved to the advancing position.

[0036] According to this embodiment, the displacement caused by the self-weight of the strip sheet (i.e., the separation distance from the upper surface of the lower die) can be controlled or adjusted regardless of the reduction in the rigidity of the strip sheet.

[0037] Invention Effects

[0038] Based on the above methods, regardless of the reduction in the rigidity of the strip steel sheet, the displacement caused by the self-weight of the strip steel sheet can be controlled or adjusted. Attached Figure Description

[0039] Figure 1 This is a schematic structural diagram of the continuous module in the first embodiment.

[0040] Figure 2 It constitutes the use Figure 1 The diagram shows a thin sheet of laminated iron core manufactured using a progressive die.

[0041] Figure 3 yes Figure 1 The enlarged view shows the main parts of the blanking worktable and the empty worktable.

[0042] Figure 4 yes Figure 1 The diagram shows a top view of the blanking worktable and the empty worktable.

[0043] Figure 5 It is along Figure 4 The cross-sectional view of the VV line ((A) shows the conveying of the strip steel, (B) shows the punching of the strip steel F).

[0044] Figure 6 It is along Figure 4 The sectional view of line VI-VI in the figure ((A) shows the conveying of the strip steel, (B) shows the punching of the strip steel F).

[0045] Figure 7 It is along Figure 4 The cross-sectional view along line VII-VII ((A) shows the conveying of the strip steel, and (B) shows the punching of the strip steel F).

[0046] Figure 8 This is a top view showing a modified example of the central guide component.

[0047] Figure 9 This is a cross-sectional view showing a modified example of the central guide component.

[0048] Figure 10 This is a top view of the adhesive coating workbench of the continuous mold according to the second embodiment. Detailed Implementation

[0049] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, for ease of explanation, directions are defined by the arrows in each figure indicating up / down, front / back, and left / right. However, the progressive die and processing methods using progressive dies according to the present invention are not necessarily limited to these directions.

[0050] (First Implementation)

[0051] Figure 1 This is a schematic structural diagram of the continuous module 1 involved in the first embodiment. Figure 2 It constitutes through Figure 1 The diagram shows a thin sheet W of a laminated iron core M manufactured by a continuous mold 1.

[0052] The progressive die 1 is an apparatus used to manufacture laminated iron cores M by processing strip steel F (thin strip steel sheet) made of electromagnetic steel sheet. For example... Figure 1 As shown, in continuous die 1, the strip F is fed along the forward direction (refer to...). Figure 1 The strip (as indicated by the arrow) is intermittently conveyed, while the portions corresponding to each sheet W are processed sequentially. Multiple worktables I-VII are provided in the progressive die 1, each processing the portions of the strip F corresponding to each sheet W. The sheet W, for example, constitutes the laminated iron core M used in the stator of a motor. Furthermore, the "processing" performed using the progressive die 1 is not limited to punching using punches and dies, but also includes processing that does not alter the shape of the strip F (or the portions corresponding to each sheet W) (e.g., applying adhesive).

[0053] In this embodiment, such as Figure 2 As shown, the portion corresponding to the thin sheet W (hereinafter referred to as the corresponding portion of the thin sheet) is arranged in two rows in the width direction of the strip F (refer to...). Figure 2 (As shown by the first line L1 or the second line L2). The corresponding portion of each sheet is approximately the area inside the shape of each sheet W punched from the strip F. Furthermore, the width direction of the strip F corresponds to the left-right direction perpendicular to the forward feed direction.

[0054] exist Figure 2 In the diagram, only one corresponding portion of the thin plate is shown on each of the first and second lines L1 and L2, but multiple corresponding portions of the thin plate are arranged at predetermined intervals in the forward conveying direction on each line L1 and L2. Additionally, in Figure 2 In this illustration, for the sake of simplicity, the thin plate W is schematically depicted as a ring shape. However, the thin plate W may include known structures such as teeth or magnetic yokes.

[0055] Furthermore, in the corresponding portion of the thin plate, adhesive is applied to each of the multiple application points E located at equal intervals along the circumference. However, the number and position of the application points E in the thin plate W, as well as the size of the adhesive applied thereto, can be varied.

[0056] Refer again Figure 1 The continuous die 1 has an upper die 3 and a lower die 4, which are configured to sandwich a strip of steel F made of electromagnetic steel plate.

[0057] The upper die 3 has a plate-shaped upper support 12 fixed to the lower surface of the upper pressure head (not shown) of the stamping machine. This allows the upper die 3 to move vertically in a manner that allows it to approach and separate from the lower die 4. In the upper die 3, a liner plate 16 and a clamping plate 18 are mounted on the lower part of the upper support 12. The clamping plate 18 fixes the guide hole punch 20, the inner shape punch 22, and the outer shape punch 24 to the upper support 12, respectively. The liner plate 16 prevents the processing forces of each punch 20, 22, and 24 from being directly applied to the upper support 12.

[0058] In the upper mold 3, a stripper 28 is installed below the upper support 12. The stripper 28 is capable of relative displacement with respect to the upper support 12 in the vertical direction. The stripper 28 is set to its maximum descent position relative to the upper support 12 by suspension support of suspension bolts (not shown). The stripper 28 is configured as a joint of a plate-shaped stripper body 30 and a stripper plate 32.

[0059] The lower surface 33 of the stripper plate 32 is opposite to the upper surface 47 of the punching die 40 and each punch 42, 44, 46, described later. In other words, the stripper plate 32 has a lower surface 33 that is parallel to the upper surface 47 of the punching die 40 and each punch 42, 44, 46. Punch insertion holes 34, 36, and 38 are formed in the stripper plate 32 for each punch 20, 22, 24 to pass through.

[0060] The lower die 4 has a plate-shaped lower support 14 fixed to the upper surface of the lower worktable (not shown) of the stamping machine. The lower support 14 is arranged opposite to the upper support 12. In the lower die 4, a plate-shaped punching die 40 is mounted on the upper surface of the lower support 14. On the punching die 40, a guide hole punching die 42, an inner shape punching die 44, and an outer shape punching die 46 are respectively mounted at positions corresponding to the punching worktables I, II, and VI.

[0061] In addition, the upper surfaces of the punching die 40, each punching die 42, punching die 44 and punching die 46 are coplanar, so their upper surfaces are collectively referred to as the upper surface 47 of the lower die 4 below.

[0062] An adhesive coating device 50 is provided in the lower mold 4. The adhesive coating device 50 is a transfer type and has a coating table 60. The coating table 60 is movably inserted into the holding hole 56 formed in the lower support 14 and the punching plate 40. The adhesive coating device 50 can move up and down by means of a cam mechanism 52 driven by a drive device 54. When the adhesive coating device 50 is in the raised position, it applies (transfers) adhesive in dots to multiple locations on the lower surface of the strip steel F. However, the adhesive coating device 50 does not apply adhesive to the thin plate W (measuring thin plate W) located at the bottom layer of the laminated iron core when it moves to the lower position.

[0063] The multiple worktables I-VII include a guide hole punching worktable I, an internal shape punching worktable II, an empty worktable III, an adhesive coating worktable IV, an empty worktable V, an external shape punching worktable VI, and an empty worktable VII. In the progressive die 1, each worktable I-VII is arranged at a predetermined interval in the forward feed direction (conveyor direction).

[0064] In the guide hole punching worktable I, the inner shape punching worktable II, the adhesive coating worktable IV, and the outer shape punching worktable VI, the punching process for the guide holes used for positioning, the inner shape punching process for the sheet W, the adhesive coating process, and the outer shape punching process for the sheet W are performed respectively. In the empty worktables III, V, and VII, the strip steel F is fed without load.

[0065] In the guide hole punching worktable I, the guide hole punching punch 20 and the guide hole punching die 42 constitute a pair of tools for punching guide holes. On the strip F, the guide hole is punched out with each punching action (i.e., each intermittent transfer of the strip F).

[0066] In the internal blanking worktable II, the internal blanking punch 22 and the internal blanking die 44 constitute a pair of tools for blanking the internal shape of the sheet metal W. On the strip F, the internal shape (e.g., including multiple teeth, shaft holes, etc.) is blanked out with each stamping operation.

[0067] In the adhesive coating workbench IV, the adhesive coating device 50 applies adhesive to the coating points E on the lower surface of the steel strip F (refer to...). Figure 2 The adhesive is applied in a dotted pattern. There are no particular limitations on the adhesive used; examples include anaerobic adhesives (adhesive + curing accelerator), single-component epoxy resin adhesives, two-component epoxy resin adhesives (first adhesive + second adhesive or main agent + initiator), acrylic resin adhesives, thermosetting adhesives, and moisture-curing adhesives. Alternatively, when using a curing accelerator, it can be added to the stamping oil used in the progressive die 1. In this case, the curing accelerator is applied together with the stamping oil to the strip F (here, the upper surface).

[0068] In the blanking worktable VI, the blanking punch 24 and the blanking die 46 constitute a pair of tools for blanking the shape of the sheet metal W. The blanking die 46 is approximately annular. An opening 46A is formed in the blanking die 46 for the blanking punch 24 to be inserted. Each blanking operation blanks the shape of the strip steel F. The sheet metal W is completed by blanking this shape (i.e., the processing of the strip steel F is finished).

[0069] In the blanking worktable VI, when the blanking of the sheet W begins (i.e., when the strip F stops), the upper die 3 is lowered, and the stripper plate 32 descends together with the upper die 3. As a result, the stripper plate 32 presses the upper surface of the strip F downwards via its lower surface 33. At this time, the strip F is clamped between the lower surface 33 of the stripper plate 32 and the upper surface 47 of the lower die 4.

[0070] When the upper die 3 is raised after the blanking of the sheet W is completed, the stripper plate 32 rises together with the upper die 3. This releases the pressure of the stripper plate 32 on the strip F, and the strip F separates from the upper surface 47 of the lower die 4. In this state, the strip F is conveyed in the forward feeding direction by a predetermined amount.

[0071] Furthermore, the operation of the stripper plate 32 is the same in other worktables IV and VII.

[0072] Although Figure 1 The details are omitted, but as will be explained later, the blanking worktable VI is equipped with a structure (hereinafter referred to as the lifting structure) for guiding the conveying of the strip F and lifting the strip F during its transport (see reference). Figures 3 to 7 The lifting mechanism includes a guide for guiding the side of the strip F and a lifter corresponding to the guide for raising the strip F. In the progressive die 1, the lifting mechanism allows for control or adjustment of the strip F's displacement due to its own weight (i.e., the separation distance from the upper surface of the lower die 4) regardless of any reduction in the rigidity of the strip F. As a result, interference between the strip F and the periphery of the progressive die 1 (i.e., accidental contact or friction, etc.) can be suppressed, and the strip F can be transported stably.

[0073] Each sheet W, which has been punched out, is pressed into the die 46 by the punch 24 and stacked sequentially on top of the previously punched sheet W. Regarding the multiple sheets W stacked in the die 46, except for the metering sheet W which is not coated with adhesive, the overlapping sheets are integrated with each other using adhesive.

[0074] Furthermore, the sheet metal W, which has been punched out, can be stacked on top of the previously punched sheet metal W after being rotated by a predetermined angle (e.g., 90°). Additionally, a pressing ring with an inner diameter slightly smaller than that of the die 46 can be provided below the die 46 in the lower die 4. The pressing ring applies a predetermined lateral pressure to the stacked sheet metal W as it moves downwards. Moreover, the progressive die 1 can also manufacture each sheet metal W independently (i.e., without fixing them to each other). In this case, the manufactured sheet metal W is fixed outside the progressive die 1 in a predetermined number of stacked sheets.

[0075] In the blanking worktable VI, a predetermined number of thin plates W bonded together in a stacked state are removed as a stacked iron core M from the lower part of the discharge hole 48 formed in the lower support 14. Alternatively, a heating process for curing the adhesive can be performed on the removed stacked iron core M using a heating furnace (not shown).

[0076] Figure 3 and Figure 4 They are Figure 1 Enlarged views and top views of the main parts of the blanking worktable VI and the empty worktable VII shown. Figure 5 It is along Figure 4 The cross-sectional view of the VV line ((A) shows the conveying of strip F, (B) shows the punching of strip F). Figure 6 It is along Figure 4 The sectional view along line VI-VI ((A) shows the conveying of strip F, and (B) shows the punching of strip F). Figure 7 It is along Figure 4 The cross-sectional view along line VII-VII ((A) shows the conveying of strip F, and (B) shows the punching of strip F).

[0077] like Figure 3 and Figure 4 As shown, in the shape blanking worktable VI, a pair of side guides 61A and 61B (first side guide and second side guide) are provided on the lower die 4. These side guides 61A and 61B guide the left side portion (i.e., the side portion on the first line L1 side) of the strip steel F located above the shape blanking die 46. The side guides 61A and 61B are fixed to the upper surface 47 (upper surface of the blanking die plate) of the lower die 4.

[0078] Side guides 61A and 61B are arranged at intervals in the conveying direction. Each side guide 61A and 61B is... Figure 4 The front and back directions shown are sandwiched by the first line L1 (refer to...) Figure 2 The blanking of the outer shape on the die is arranged with the center C1 of the die 46. Furthermore, the distance G1 between the side guides 61A and 61B is preferably set to be less than the width G2 of the strip F. However, it is also possible that the distance G1 between the side guides 61A and 61B is larger than the width G2 of the strip F. Additionally, the distance G1 between the side guides 61A and 61B is... Figure 4 The front-to-back direction shown can be set to be less than the extension range (length G3) of the die 46 for external blanking.

[0079] In addition, a pair of lifting devices 63A and 63B (first lifting device and second lifting device) are provided in the lower mold 4. The pair of lifting devices 63A and 63B are configured in correspondence with the pair of side guides 61A and 61B to lift the left side of the strip steel F during conveying.

[0080] like Figure 4 and Figure 5 As shown, a (rear) side guide 61A has a block-shaped main body 65A and a horizontal wall 66A (guide wall) extending to the right from the upper right side of the main body 65A. Viewed in a section perpendicular to the conveying direction, a guide recess 69A with a side (here, right-hand) opening is formed in the side guide 61A by the right side surface 67A of the main body 65A, the lower surface 68A of the horizontal wall 66A, and the upper surface 47 of the lower mold 4. The left side portion of the strip steel F (i.e., a strip-shaped area including a predetermined width of the left edge) is inserted into the guide recess 69A.

[0081] A protrusion 70A (first abutment portion) protruding downwards (i.e., toward the upper surface 47 of the lower mold 4) is formed on the horizontal wall 66A. Figure 5 As shown, the protrusion 70A has a generally trapezoidal cross-section (an inverted trapezoid with a lower base shorter than the upper base). As described later, the end of the protrusion 70A abuts (or slides into contact with) the upper surface of the strip F during conveying. Here, the end of the protrusion 70A corresponds to the lower base of the trapezoid in the aforementioned cross-section, comprising a horizontal plane extending substantially parallel to the upper surface 47 of the lower die 4.

[0082] Another (front) side guide 61B has a configuration symmetrical to that of side guide 61A in the front-rear direction. That is, regarding side guides 61A and 61B, in Figure 5 In this configuration, with an axis of symmetry defined along a line passing through their midpoint in the vertical direction (a line perpendicular to the upper surface 47), the side guides 61A and 61B are in a linearly symmetrical relationship. Apart from this, the side guide 61B has a structure substantially the same as the side guide 61A, therefore its detailed description is omitted. Furthermore, in Figures 3 to 5 In the text, regarding side guide 61B, structural elements identical to those in side guide 61A are labeled with the same number instead of "A" and are accompanied by the label "B".

[0083] In addition, such as Figure 4 As shown, side guides 201 and 202 for guiding the left side portion of the strip steel F are respectively provided in front of the side guide 61B. The side guides 201 and 202 have a structure that is substantially the same as that of the side guides 61A and 61B, except that the protrusions 70A and 70B are omitted.

[0084] like Figure 4 and Figure 5As shown, a lifting device 63A has a lifting pin 75A and a lifting spring 76A consisting of a compression coil spring that always applies an upward force to the lifting pin 75A.

[0085] The lifting pin 75A is received in a lifting pin hole 77A that opens on the upper surface 47 of the lower die 4. Here, the lifting pin hole 77A extends from the upper surface 47 of the lower die 4 through the punch plate 40 and extends to the lower support 14. The lifting pin 75A can move between a rising position (advancing position moving upward) and a falling position (retreating position moving downward) in the lifting pin hole 77A.

[0086] The pushing part 79A (first pushing part) formed at the end of the lifting pin 75A uses the force of the lifting spring 76A to push the lower surface of the steel strip F. For example... Figure 4 As shown, when viewed from above, the pressing part 79A has an inclined surface 80A (first inclined surface) which is arranged along the tangential direction at a predetermined position on the periphery of the opening 46A of the shape blanking die 46.

[0087] In addition, such as Figure 5 As shown, the pressing part 79A has a horizontal surface 81A extending substantially parallel to the upper surface 47 of the lower die 4. Furthermore, the pressing part 79A has an inclined surface 82A (a second inclined surface) connected to the rear side (upstream side in the forward conveying direction) of the horizontal surface 81A and inclined downwards. The inclined surface 82A is inclined from the lower side to the upper side in the conveying direction (horizontal surface 81A side). This inclined surface 82A prevents the smooth movement of the strip F in the forward conveying direction from being obstructed by the lifting pin 75A.

[0088] The pushing part 79A of the lifting pin 75A in the lifting device 63A is located forward of the end of the protrusion 70A of the corresponding side guide 61A (downstream side in the forward feeding direction).

[0089] The lifting spring 76A is housed in a spring receiving hole 83A formed in the lower mold 4 (here, the lower support 14). The lifting spring 76A is connected to the lifting pin 75A via a connecting member 84A.

[0090] The lifter 63A is capable of moving up and down within the guide recess 69A. In addition, when viewed from above, the lifter 63A is positioned at a position overlapping with the side guide 61A (i.e., below the horizontal wall 66A).

[0091] Another lifting device 63B has the same structure as lifting device 63A, so its detailed description is omitted. Furthermore, the pushing portion 79B (second pushing portion) of the lifting pin 75B in lifting device 63B is located rearward (upstream in the forward feeding direction) than the end of the protrusion 70B (second abutment portion) of the corresponding side guide 61B. That is, the abutment portions (ends of protrusions 70A, 70B) of a pair of side guides 61A, 61B that abut against the strip F are configured to sandwich the pushing portions 79A, 79B of a pair of lifting devices 63A, 63B in the forward feeding direction. Furthermore, in Figures 3 to 5 In the text, for elevator 63B, the same constituent elements as elevator 63A are labeled with the same number instead of "A" and are accompanied by the designation "B".

[0092] When conveying steel F, the pressing force of the stripper plate 32 on steel F is released. Therefore, as Figure 5 As shown in (A), the left side of the strip F located on the blanking worktable VI is lifted upward by the pushing parts 79A and 79B of the lifters 63A and 63B (i.e., by the force of the springs 76A and 76B of the lifters). At this time, the ends of the protrusions 70A and 70B of the side guides 61A and 61B are located below the rising position of the pushing parts 79A and 79B of their respective lifters 63A and 63B. In addition, the upper surface of the strip F is separated from the lower surface 68A of the horizontal wall 66A of each side guide 61A and 61B, except for the ends of the protrusions 70A and 70B.

[0093] At this time, an upward force acts on the left side of the strip F. More specifically, a force acts on the left side of the strip F as if there were two levers, with the pushing parts 79A and 79B as fulcrums and the protrusions 70A and 70B as force points. As a result, between the side guides 61A and 61B, compared to the case where it is not pushed by the lifting devices 63A and 63B, the left side of the strip F moves further upward from the upper surface 47 of the lower die 4 (especially the periphery of the opening 46A of the shape punching die 46 on the first line L1 side).

[0094] Furthermore, due to its rigidity, the strip F (electromagnetic steel sheet) not only on its left side, but also on the side of the first line L1 above the blanking die 46, is separated upwards from the upper surface 47 of the lower die 4. As a result, interference between the strip F and the periphery of the progressive die 1 (in this case, the blanking die 46 of the lower die 4) during transport can be avoided. Therefore, the strip F after blanking the sheet W can be transported stably in the progressive die 1.

[0095] During the punching of the strip steel F (when stopped), its upper surface is pressed downwards by the lower surface 33 of the stripper plate 32. Thus, as... Figure 5As shown in (B), the lower surface of the strip F is in contact with the upper surface 47 of the lower die 4. Furthermore, the pushing portions 79A and 79B of the lifting pins 75A and 75B are pressed downwards by the lower surface of the strip F with a force that overcomes the force of the lifting springs 76A and 76B, thereby causing the pushing portions 79A and 79B to retract into the lifting pin holes 77A and 77B, respectively. Additionally, the upper surface of the strip F is separated from the protrusions 70A and 70B.

[0096] In addition, such as Figure 4 As shown, in the shape blanking worktable VI, a pair of side guides 161A and 161B (the third and fourth side guides) are provided on the lower die 4 to guide the right side portion (i.e., the side portion on the second line L2 side) of the strip steel F located above the shape blanking die 46. The side guides 161A and 161B are fixed to the upper surface 47 of the lower die 4. The side guides 161A and 161B are arranged in a different position in the front-back direction than the side guides 61A and 61B (in this case, the downstream side in the forward feeding direction).

[0097] Additionally, a pair of lifting devices 163A and 163B (the third and fourth lifting devices) are provided in the lower mold 4. These lifting devices 163A and 163B are configured correspondingly to the pair of side guides 161A and 161B, lifting the right side of the strip F during conveying. When viewed from above, each lifting device 163A and 163B is positioned overlapping with its corresponding side guide 161A and 161B.

[0098] Side guides 161A and 161B have the same structure as side guides 61A and 61B, except for the items mentioned below.

[0099] like Figure 4 and Figure 6 As shown, the length of a side guide 161A in the forward feeding direction is set slightly shorter than that of the side guide 61A. More specifically, the body 165A and the horizontal wall 166A of the side guide 161A have a structure that omits the portion of the protrusion 170A (corresponding to the protrusion 70A of the side guide 61A) on the rearward side. However, the side guide 161A may have the same length as the side guide 61A in the forward feeding direction (i.e., it may have the same structure as the side guide 61A).

[0100] Another side guide 161B has a configuration symmetrical to that of side guide 161A in the front-rear direction. Additionally, in Figure 4 and Figure 6 In the text, regarding side guide 161B, structural elements identical to those in side guide 161A are labeled with the same number instead of "A" and are accompanied by the designation "B".

[0101] In addition, such as Figure 4 As shown, side guides 300 and 301 for guiding the right side portion of the strip F are respectively provided behind the side guide 161B. Additionally, a side guide 302 for guiding the right side portion of the strip F is provided in front of the side guide 161B. The side guide 302 is arranged such that it is sandwiched between the side guide 161B and the central guide 111 (described later). The side guides 300-302 have a structure substantially the same as the side guides 161A and 161B, except that the protrusions 170A and 170B are omitted.

[0102] Regarding a lifter 163A, except that its relative position in the front-to-back direction with respect to the side guide 161A is slightly different from that of the lifter 63A with respect to the side guide 61A (near the protrusion 170A side), it has the same structure as the lifter 63A.

[0103] Another elevator 163B has the same structure as elevator 163A, therefore its detailed description is omitted. Additionally, in Figure 4 and Figure 6 In the text, regarding the elevator 163B, the same constituent elements as those in the elevator 163A are labeled with the same number instead of "A" and are accompanied by the designation "B".

[0104] When the conveyor belt steel is F, such as Figure 6 As shown in (A), the right side of the strip F located on the blanking worktable VI is lifted upward by the pushing parts 179A and 179B (the third and fourth pushing parts) of the lifters 163A and 163B. At this time, the ends of the protrusions 170A and 170B of the side guides 161A and 161B are located below the rising positions of the pushing parts 179A and 179B of their respective lifters 163A and 163B.

[0105] Therefore, an upward force acts on the right side of the strip F. More specifically, a force acts on the right side of the strip F as if there were two levers, with the pushing parts 179A and 179B as fulcrums and the protrusions 170A and 170B as force points. As a result, regarding the right side of the strip F, between the side guides 161A and 161B, compared to the case where it is not pushed by the lifting devices 163A and 163B, it becomes a state that further separates upward from the upper surface 47 of the lower die 4 (especially the periphery of the opening 46A of the shape punching die 46 on the second line L2 side).

[0106] Furthermore, due to the rigidity of the strip steel F, not only the right side but also the portion above the shape-cutting die 46 on the second line L2 side is separated upwards from the upper surface 47 of the lower die 4. As a result, interference between the strip steel F and the periphery of the progressive die 1 (in this case, the shape-cutting die 46 of the lower die 4) during transport can be avoided. Therefore, the strip steel F after being punched out into sheet W can be transported stably in the progressive die 1.

[0107] In the progressive die 1, in particular, the two sides of the strip F are lifted by the lifters 63A, 63B and 163A, 163B respectively, thereby more reliably avoiding interference between the strip F and the periphery of the progressive die 1 during transport.

[0108] When punching strip steel F, such as Figure 6 As shown in (B), the pushing portions 179A and 179B of the lifting pins 175A and 175B are pressed downward by the lower surface of the strip F, thereby retracting into the lifting pin holes 177A and 177B respectively. In addition, the upper surface of the strip F is separated from the protrusions 170A and 170B.

[0109] like Figure 3 as well as Figure 4 As shown, in the empty worktable VII, multiple (in this case, five) central lifters 90 (the fifth lifter) are provided in the lower die 4 to lift the strip steel F during conveying. The empty worktable VII is located downstream of the shape blanking worktable VI in the forward conveying direction.

[0110] Multiple central lifters 90 are arranged in a row at predetermined intervals in the left-right direction. In addition, the multiple central lifters 90 are located in the left-right direction on the inner side (central side in the width direction of the steel F) of lifters 63A, 63B and lifters 163A, 163B.

[0111] like Figure 7 As shown, each central lift 90 has a lifting block 93 and a pair of lift springs 94 consisting of a compression coil spring that always applies an upward force to the lifting block 93.

[0112] Each lifting block 93 is housed in a lifting block hole 97 that opens on the upper surface 47 of the lower die 4. Here, each lifting block hole 97 extends from the upper surface 47 of the lower die 4 through the punch plate 40 and extends to the lower support 14. Each lifting block 93 can move between a rising position (forward position moving upwards) and a falling position (reverse position moving downwards) within its respective lifting block hole 97. The longitudinal dimension of each lifting block 93 is set to be larger than that of lifting pins 75A, 75B and 175A, 175B.

[0113] The pushing part 99 (fifth pushing part) formed at the end of each lifting block 93 pushes the lower surface of the strip steel F by means of the force of the lifting spring 94. Figure 7 As shown, each pressing part 99 has a horizontal surface 101 extending substantially parallel to the upper surface 47 of the lower die 4. Furthermore, each pressing part 99 has inclined surfaces 103 and 104 that are connected to the horizontal surface 101 from front to back and slope downwards. Through these inclined surfaces 103 and 104, the smooth movement of the strip F in the forward feeding direction can be prevented from being obstructed by the lifting block 93.

[0114] Each lifting spring 94 is housed in a spring receiving hole 106 formed in the lower mold 4 (here, the lower support 14). The lifting spring 94 is connected to the lifting block 93 via each connecting member 108.

[0115] Furthermore, in the empty worktable VII, in the lower die 4, a central guide 111 is provided downstream of the central lifter 90 in the forward feeding direction. The central guide 111 is fixed to the upper surface of the lower support 14. However, the central guide 111 can also be fixed to the upper surface of the punching die 40.

[0116] The central guide 111 has a through hole 113 through which the strip steel F passes. Although not shown in the figure, the through hole 113 is generally rectangular in shape, longer in the left-right direction when viewed from the front-back direction. The central guide 111 has an upper wall 115 (fifth abutment portion) that defines the upper surface of the through hole 113. At the rear of the upper wall 115, the lower surface 116 includes an inclined surface 116A that slopes upward toward the rearward direction.

[0117] When the conveyor belt steel is F, such as Figure 7 As shown in (A), the strip F is lifted upward by the pushing portions 99 of each central elevator 90 over approximately the entire width region. At this time, the lower surface 116 of the upper wall 115 of the central guide 111 is located below the pushing portions 99 (horizontal plane 101) of each central elevator 90 in the raised position, while in sliding contact with the upper surface of the strip F.

[0118] Therefore, an upward force acts on the strip F in the empty worktable VII (i.e., the portion rearward of the central lifter 90). More specifically, a force acts on the strip F as if there were multiple levers with each pressing part 99 as a fulcrum and the lower surface 116 of the upper wall 115 (located at a predetermined position on the lower surface 116 in front of each pressing part 99) as the force point. As a result, compared to the case where it is not pressed by the multiple central lifters 90, the strip F on the empty worktable VII separates further upward from the upper surface 47 of the lower die 4 (in this case, the periphery of the front side of the opening 46A of the blanking die 46 of the blanking worktable VI). Thus, interference between the strip F and the blanking die 46 can be more reliably avoided.

[0119] Furthermore, multiple lifting blocks 93 and a central guide 111 can also be installed on other empty worktables. Additionally, the number and spacing of the multiple lifting blocks 93 can be appropriately varied. Moreover, the multiple lifting blocks 93 and the central guide 111 can be used independently of other lifters or side guides (i.e., even without the side guides 61A, 61B, 161A, 161B and lifters 63A, 63B, 163A, 163B). Furthermore, the central guide 111 can also be configured to be divided into multiple parts in the left-right direction (the width direction of the strip F) (i.e., it can also be composed of multiple components arranged in the left-right direction).

[0120] Figure 8 and Figure 9 These are a top view and a cross-sectional view of a modified example of the central guide 111 described above (hereinafter referred to as central guide 211). Figure 8 and Figure 9 respectively with Figure 4 Top view and Figure 7 The cross-sectional view roughly corresponds to that. Regarding the central guide 211, unless otherwise specifically mentioned below, the same applies to the central guide 111 described above. Additionally, in Figure 8 as well as Figure 9 In the middle, to and Figure 4 as well as Figure 7 Components that are identical to each other are labeled with the same number and detailed descriptions are omitted.

[0121] In the above Figure 7 The image shows an example where the central guide 111 is fixed to the upper surface of the lower bracket 14, but as shown in the image... Figure 9 As shown, the central guide 211 is fixed to the side of the lower die 4 (here, at least one of the lower support 14 and the punching plate 40).

[0122] The central guide 211 has a lower part 213 mounted on the side of the lower mold 4 and an upper part 215 connected to the lower part 213.

[0123] The lower component 213 has a generally L-shaped cross section, including a longitudinal strip 221 extending parallel to the side of the lower mold 4 and a lower horizontal strip 223 extending forward from the upper end of the longitudinal strip 221.

[0124] The upper part 215 has an upper horizontal piece 225 (fifth abutment portion) that extends substantially parallel to the lower horizontal piece 223 of the lower part 213, and an inclined piece 227 that slopes obliquely upward toward the rearward direction from the rear edge of the horizontal piece.

[0125] The upper horizontal plate 225 is fixed to the lower horizontal plate 223 by multiple (two in this case) bolts 228. For example... Figure 8 As shown, bolts 228 are respectively disposed at the left and right ends of the central guide 211 in a manner that does not obstruct the conveying of the strip steel F.

[0126] The lower horizontal strip 223 and the upper horizontal strip 225 are separated vertically at least over the entire width direction of the strip F to allow the strip F to pass through. Figure 9 As shown in (A), the lower surface 229 of the upper horizontal plate 225 of the central guide 211, in a state of sliding contact with the upper surface of the strip F, is located below the pushing part 99 (horizontal surface 101) of each central elevator 90 in the raised position. The inclined plate 227 of the upper component 215 guides the strip F into the gap between the lower horizontal plate 223 and the upper horizontal plate 225.

[0127] Furthermore, the shape of the lower component 213 is not limited to a plate shape; it can also be other shapes (e.g., block shape) as long as it includes at least the same surface as the upper surface 231 of the lower horizontal piece 223. Similarly, the shape of the upper component 215 can also be other shapes as long as it includes at least the same surface as the lower surface 229 of the upper horizontal piece 225.

[0128] This central guide 211 is different from the central guide 111 fixed to the upper surface 47 of the lower mold 4, and is particularly effective when the upper surface 47 of the lower mold 4 cannot adequately ensure the setting space.

[0129] (Second Implementation)

[0130] Figure 10 This is a top view of the adhesive coating workbench IV of the continuous mold 1 according to the second embodiment. Regarding the second embodiment, matters not specifically mentioned below are the same as those in the first embodiment described above. Furthermore, in Figure 10In this document, the same reference numerals are used for the same components as those in the continuous module 1 described in the first embodiment, and detailed descriptions are omitted.

[0131] In the first embodiment, an example is shown where the lifting structure for the strip F is provided on the shape punching worktable VI, but it is not limited thereto. The lifting structure can be provided on one or more worktables as needed.

[0132] For example, such as Figure 10 As shown, in progressive die 1, the lifting structure for the strip F can also be set on the adhesive coating table IV. The side guides 61A and 61B are... Figure 10 The adhesive applicator 50 is arranged in the front-back direction such that it sandwiches the center C2 of the adhesive applicator 50 on the first line L1. On the upper surface of the adhesive applicator 50, at the application point E of the adhesive on the sheet W (refer to...) Figure 2 The corresponding position has an adhesive discharge hole 119.

[0133] In the adhesive coating workbench IV, similar to the case of the shape punching workbench VI, compared to the case where it is not pushed by the lifters 63A and 63B, the left side of the strip F becomes a state that is further separated upward from the upper surface 47 of the lower die 4 (especially the periphery of the opening 120 of the punching plate 40 of the adhesive coating device 50 that houses the first line L1 side).

[0134] Furthermore, the lifting structure for the right side of the strip F is the same as that for the left side of the strip F.

[0135] The present invention has been described above based on specific embodiments, but these embodiments are merely illustrative and the present invention is not limited to these embodiments. Not all components of the manufacturing apparatus and manufacturing method for the laminated iron core of the present invention shown in the above embodiments are essential; they can be appropriately selected as long as they do not depart from the scope of the present invention.

[0136] For example, the lifting devices 63A, 63B, 163A, 163B, and 90 in the above embodiments are configured to be installed on the lower mold 4, but are not limited thereto; at least one of them may also be installed outside the lower mold 4. Furthermore, the lifting devices 63A, 63B, 163A, 163B, and 90 are configured to push the lower surface of the strip F from below, but at least one of them may also be configured to pull the strip F from above.

[0137] Furthermore, in the above-described embodiment, the corresponding portions of the thin plates are configured in two rows along the width direction of the strip F, but they can also be configured in one row. In this case, the lifting structure can be provided only on one side of the strip F (e.g., the left side) or on both sides of the strip F (i.e., the left and right sides).

[0138] In addition, in the above-described embodiments, the steel strip F is fixed by adhesive bonding, but it is not limited to this (or, in addition to this), riveting protrusions and grooves can be formed on each thin plate W so that the thin plates W are pressed together in an overlapping state.

[0139] Label Explanation

[0140] 1: Continuous mode;

[0141] 3: Upper mold;

[0142] 4: Lower mold;

[0143] 12: Upper support;

[0144] 14: Lower support;

[0145] 16: Lining plate;

[0146] 18: Plywood;

[0147] 20: Punch for punching guide holes;

[0148] 22: Punch for internal blanking;

[0149] 24: Punch for external blanking;

[0150] 28: Deloader;

[0151] 30: Body of the unloader;

[0152] 32: Stripper plate;

[0153] 33: The lower surface of the stripper plate;

[0154] 34, 36, 38: Punch insertion holes;

[0155] 40: Stamping template;

[0156] 42: Stamping die for punching guide holes;

[0157] 44: Die for internal blanking;

[0158] 46: Stamping dies for external blanking;

[0159] 46A: Opening of a die for external blanking;

[0160] 47: The upper surface of the lower mold;

[0161] 48: Discharge port;

[0162] 50: Adhesive coating device;

[0163] 52: Cam mechanism;

[0164] 54: Drive unit;

[0165] 56: Retaining hole;

[0166] 60: Coating table;

[0167] 61A, 61B: Side guides (first side guide and second side guide);

[0168] 63A, 63B: Elevators (first elevator and second elevator);

[0169] 65A, 65B: The main body of the side guide;

[0170] 66A, 66B: Horizontal walls (guide walls);

[0171] 67A, 67B: Right side;

[0172] 68A, 68B: Lower surface;

[0173] 69A, 69B: guide recess;

[0174] 70A, 70B: Protrusions (first abutment and second abutment);

[0175] 75A, 75B: Lifting pins;

[0176] 76A, 76B: Springs for lifting devices;

[0177] 77A, 77B: Lifting pin holes;

[0178] 79A, 79B: Pressing section (first pressing section and second pressing section);

[0179] 80A, 80B: Inclined surfaces;

[0180] 81A, 81B: Horizontal plane;

[0181] 82A, 82B: Inclined surfaces;

[0182] 83A, 83B: Reception port;

[0183] 84A, 84B: Connecting components;

[0184] 90: Central elevator (fifth elevator);

[0185] 93: Lifting block;

[0186] 94: Springs for lifting devices;

[0187] 97: Lifting block hole;

[0188] 99: Pressing section (fifth pressing section);

[0189] 101: Horizontal plane;

[0190] 103, 104: Inclined surfaces;

[0191] 106: Reception port;

[0192] 108: Connecting components;

[0193] 111: Central Guide Component;

[0194] 113: Penetration hole;

[0195] 115: Upper wall (fifth contact point);

[0196] 116: Lower surface;

[0197] 116A: Inclined surface;

[0198] 119: Discharge outlet;

[0199] 120: Opening;

[0200] 161A, 161B: Side guides (third side guide and fourth side guide);

[0201] 163A, 163B: Elevators (third and fourth elevators);

[0202] 165A, 165B: The main body of side guide 1;

[0203] 166A, 166B: Horizontal wall (guide wall);

[0204] 170A, 170B: Protrusions (third and fourth contact parts);

[0205] 175A, 175B: Lifting pin;

[0206] 177A, 177B: Lifting pin hole;

[0207] 179A, 179B: Pressing section (third pressing section and fourth pressing section);

[0208] 201, 202: Side guide components;

[0209] 211: Central Guide Component;

[0210] 213: Lower component;

[0211] 215: Upper component;

[0212] 221: Longitudinal slice;

[0213] 223: Lower horizontal piece;

[0214] 225: Upper horizontal piece (fifth contact part);

[0215] 227: Inclined plate;

[0216] 228: Bolt;

[0217] 229: The lower surface of the upper horizontal piece;

[0218] 231: The upper surface of the lower horizontal piece;

[0219] 300, 301, 302: Side guide components;

[0220] C1, C2: Center;

[0221] E: Coating point;

[0222] F: Steel strip;

[0223] G1: Distance between side guides 61A and 61B;

[0224] G2: Width of the steel strip F;

[0225] G3: Extension range (length) of die 46 for external blanking;

[0226] L1: First line;

[0227] L2: Second line;

[0228] M: Laminated iron core;

[0229] W: Thin sheet.

Claims

1. A progressive die for punching sheet metal from an intermittently fed strip of thin steel, wherein, The continuous die is equipped with multiple worktables, each of which processes the portion of the strip steel plate corresponding to each of the thin plates. The progressive die includes an upper die and a lower die, which clamp the strip of thin steel plate processed in the plurality of worktables. At least one of the plurality of workstations includes: A first side guide and a second side guide, which are arranged at intervals from each other in the conveying direction of the strip of thin steel sheet, guide one side portion of the strip of thin steel sheet; and A first lifter and a second lifter, respectively configured corresponding to the first side guide and the second side guide, lift the strip of thin steel plate. The first and second lifting devices have a first pressing part and a second pressing part that respectively press against the lower surface of the strip-shaped thin steel plate. The first pressing part and the second pressing part are each movable between an upward advancing position and a downward retracting position. The first side guide and the second side guide have a first abutting portion and a second abutting portion that respectively abut against the upper surface of the strip-shaped thin steel plate. The first abutting portion and the second abutting portion are configured to sandwich the first pressing portion and the second pressing portion in the conveying direction, and are located below the forward position of their respective first pressing portion or second pressing portion.

2. The continuous modulus according to claim 1, wherein, The distance between the first side guide and the second side guide is less than the width of the strip-shaped thin steel plate.

3. The continuous modulus according to claim 1 or 2, wherein, In the strip-shaped thin steel sheet, the portions corresponding to the thin sheets arranged in the conveying direction are configured in two rows. The at least one workbench includes: The third and fourth side guides, spaced apart from each other in the conveying direction, guide the other side of the strip of thin steel sheet; and The third and fourth lifters, respectively, are configured corresponding to the third and fourth side guides to lift the strip of thin steel plate. The third and fourth lifting devices have a third pressing part and a fourth pressing part that respectively press against the lower surface of the strip-shaped thin steel plate. Each of the third and fourth pressing parts is movable between an upward advancing position and a downward retracting position. The third and fourth side guides have a third abutting portion and a fourth abutting portion respectively abutting against the upper surface of the strip-shaped thin steel plate. The third and fourth abutting portions are configured to sandwich the third and fourth pushing portions in the conveying direction and are located below the forward position of their respective third or fourth pushing portions.

4. The continuous modulus according to claim 1 or 2, wherein, The first side guide and the second side guide each have a guide wall, which is located above the pushing part of the corresponding first or second lifter.

5. The continuous modulus according to claim 1 or 2, wherein, The at least one worktable is a shape-cutting worktable for processing the shape of the sheet from the strip of thin steel. The external blanking worktable includes: A punch for blanking, which is disposed on the upper die; and A die for forming a shape, disposed in the lower die, having an opening for inserting the punch for forming the shape.

6. The continuous modulus according to claim 5, wherein, Viewed from a direction perpendicular to the strip of thin steel sheet, the first and second lifters have a first inclined surface, which is arranged along the tangent direction at a predetermined position on the periphery of the opening in the die for shaping.

7. The continuous modulus according to claim 5, wherein, The plurality of worktables also includes an empty worktable, which is located downstream of the shape punching worktable in the conveying direction and does not process the portions corresponding to each of the thin sheets. The empty worktable also includes a plurality of fifth lifters arranged at intervals along the width direction of the strip of thin steel plate. Each of the fifth lifting devices has a fifth pressing part that presses against the lower surface of the strip of thin steel plate, and each of the fifth pressing parts is movable between an advancing position to the upper and a retreating position to the lower.

8. The continuous modulus according to claim 7, wherein, The empty worktable also includes a central guide, which is disposed downstream of the plurality of fifth lifters in the conveying direction and slides in contact with the upper surface of the strip-shaped thin steel plate. The central guide has a fifth abutting portion that abuts against the upper surface of the strip-shaped thin steel plate, the fifth abutting portion being located below the forward position of the fifth pushing portion of each of the fifth lifters.

9. The continuous modulus according to claim 1 or 2, wherein, The at least one workbench is an adhesive application workbench for applying adhesive to the portions corresponding to each of the thin plates. The adhesive coating workbench includes an adhesive coating device disposed on the lower mold, which applies adhesive to the portions corresponding to each of the thin plates.

10. The continuous modulus according to claim 1 or 2, wherein, The pushing portion of each of the first and second lifters has a second inclined surface that slopes upward from the lower side toward the conveying direction.

11. A processing method using a progressive die, the progressive die being used to punch sheet metal from an intermittently fed strip of thin steel, wherein, The continuous die is equipped with multiple worktables, which respectively process the portions of the strip steel corresponding to each of the thin sheets. The progressive die includes an upper die and a lower die, which clamp the strip of thin steel plate processed in the plurality of worktables. Regarding at least one of the plurality of worktables A first side guide and a second side guide, which are spaced apart from each other in the conveying direction of the strip steel sheet, are used to guide one side portion of the strip steel sheet. The strip of thin steel plate is lifted using a first lifter and a second lifter respectively configured corresponding to the first side guide and the second side guide. The first and second lifting devices have a first pressing part and a second pressing part that respectively press against the lower surface of the strip-shaped thin steel plate. The first pressing part and the second pressing part are each movable between an upward advancing position and a downward retracting position. The first side guide and the second side guide have a first abutting portion and a second abutting portion that respectively abut against the upper surface of the strip-shaped thin steel plate. The first abutting portion and the second abutting portion are configured to sandwich the first pressing portion and the second pressing portion in the conveying direction. When conveying the strip of thin steel sheet, in order to position the first abutting part and the second abutting part below the forward position of their respective first pressing part or second pressing part, the first pressing part and the second pressing part are moved to the forward position respectively.

Images