JP5109546B2 - Laminated core manufacturing equipment - Google Patents

Description

  The present invention relates to a laminated core manufacturing apparatus using a steel plate such as a soft magnetic steel plate.

As a method of manufacturing a laminated core (laminated iron core) used for motors and transformers, a plurality of core materials (iron core materials) obtained by punching steel plates are bonded with an adhesive, and integrated as a laminated core. A method is known (for example, Patent Documents 1 to 32). In general, in this manufacturing method, a steel plate is fed into an apparatus equipped with an adhesive application unit and a punching unit (punch / die). First, the steel plate is subjected to punching processing other than the outer periphery of the core material, and then the steel plate portion that becomes the core material Then, an adhesive is applied to the steel plate, and then the outer periphery of the core material is punched into the steel plate. The punched core material is sequentially stacked in the punching hole of the punching means (die), and the stacked core materials are bonded together by the applied adhesive, whereby a plurality of core materials are integrated with the adhesive. A bonded laminated core is obtained.
JP 2001-321850 A JP 2002-151339 A JP 2001-025218 A

In such a laminated core manufacturing method, when an adhesive is applied to the upper surface of the steel sheet by an adhesive application means, the adhesive may be crushed by a punch for punching. It becomes difficult to bond the two stably.
On the other hand, when the adhesive is applied to the lower surface of the steel sheet by the adhesive application means, if the steel sheet surface to which the adhesive is applied comes into contact with the lower mold, the adhered adhesive is disturbed, and in this case, the adhesion between the core materials is also reduced. May cause problems. For this reason, it is necessary to move the steel plate in the apparatus so that the application surface of the adhesive does not contact the lower mold.

In Patent Document 1, in the manufacturing method including the step of applying an adhesive to the lower surface of the steel plate, the steel plate is moved up and down between the upper and lower molds by the lifter pin, but the specific structure is not clear, and the mold There is a possibility that a holding mechanism provided outside the (apparatus) is used. However, since a strong tension is not applied to the punched steel sheet, when the steel sheet is held outside the mold (device), the adhesive application surface comes into contact with the lower mold due to the bending of the steel sheet. .
On the other hand, in Patent Document 3, a concave groove is formed on the upper surface of the lower die from the adhesive application portion to the core material outer peripheral punching portion so as to avoid contact between the steel plate surface to which the adhesive is applied and the lower die. However, due to structural limitations of the mold, it is difficult to provide a concave groove around the die of the core material outer peripheral punching part, so contact between the adhesive application surface and the lower mold is completely achieved. It cannot be prevented.

  Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, in an apparatus for manufacturing a laminated core by applying an adhesive to the lower surface of a steel plate and bonding a plurality of core materials punched from the steel plate with the adhesive. The necessary processing can be performed by moving the steel plate in the apparatus without bringing the lower surface of the steel plate coated with the adhesive into contact with the lower mold, thereby stably producing a laminated core having high lamination strength. It is in providing the manufacturing apparatus which can do.

The gist of the present invention for solving the above problems is as follows.
[1] An apparatus main body (A) composed of upper and lower molds (1, 2) is provided on a lower surface of a steel plate portion which is a punching mechanism portion (3) for punching a steel plate other than the outer periphery of the core material. An adhesive application mechanism part (4) for applying an adhesive and an outer peripheral punching mechanism part (5) for punching the outer periphery of the core material on the steel sheet in this order in the steel sheet feeding direction, and the punched core material In the manufacturing apparatus having the core material lamination / bonding mechanism (6) for laminating and bonding the core materials with the adhesive,
The lower mold (2) is provided with a holding mechanism (7) that can hold the steel plate at a position higher than the upper surface of the lower mold, and the upper end of the holding mechanism (7) can protrude from the upper surface of the lower mold. a steel plate holding member (70), such a manufacturing apparatus of a laminated core which have a drive means for the biasing means or vertical movement (71) for urging the steel plate holder (70) upwards,
The steel plate holder (70) holds the lower surface of the steel plate in the width direction and over the entire width of the steel plate, and the laminated core manufacturing apparatus.

[2] An apparatus for manufacturing a laminated core according to [1] , wherein the holding mechanism (7) is provided at least at the steel sheet entrance side position and the exit side position of the apparatus body (A).
[3] In the manufacturing apparatus of [2 ] above, a steel plate holder (70) is further applied to the lower surface of the steel plate at each entry side position of the adhesive application mechanism portion (4) and / or the outer peripheral punching mechanism portion (5). An apparatus for producing a laminated core, characterized in that a holding mechanism (7) is provided so as not to interfere with the applied adhesive.

  According to the manufacturing apparatus of the present invention, since the steel plate can be held at a position higher than the upper surface of the lower die by the holding mechanism when the upper die is not operated, the lower surface of the steel plate to which the adhesive is applied is lowered. Without making contact with the mold, the steel plate can be moved in the apparatus to perform necessary processing, and thus a laminated core having high lamination strength can be stably produced.

1 to 3 show an embodiment of a laminated core manufacturing apparatus according to the present invention. FIG. 1 (a) is an explanatory view showing the processing / processing status of a steel plate x at each manufacturing stage. (B) is an explanatory view showing a section of the manufacturing apparatus, FIG. 2 is a front view of the holding mechanism shown in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG.
In this laminated core manufacturing apparatus, the apparatus body A is composed of upper and lower molds 1 and 2, the upper mold 1 is a movable mold having a punch, and the lower mold 2 is a fixed mold having a die. Yes. The upper mold 1 moves up and down by a hydraulic drive mechanism (not shown).
The apparatus main body A composed of such upper and lower molds 1 and 2 is provided with each mechanism as shown below. In addition, a material feeding mechanism B (feeding roll) for sequentially feeding the strip-shaped steel plate x into the apparatus main body A is provided on the entry side of the apparatus main body A.

The apparatus main body A includes a punching mechanism portion 3 for punching a steel plate x other than the outer periphery of the core material, an adhesive application mechanism portion 4 for applying an adhesive to the lower surface of the steel plate portion serving as the core material, and a core for the steel plate x. The outer peripheral punching mechanism 5 for punching the outer periphery of the material is provided in this order in the steel sheet feeding direction. In addition, in the apparatus of this invention, it is not prevented that another mechanism part is provided between these mechanism parts 3-5, or before and behind.
The punching mechanism unit 3 includes a punch 30 provided on the upper die 1 and a die 31 provided on the lower die 2, and performs a punching process other than the outer periphery of the core material such as the inner periphery of the core material and the teeth. Such punching operations other than the outer periphery of the core material may be performed in a plurality of steps, and in that case, a plurality of punching mechanism portions 3 are provided in the steel sheet feeding direction.

The adhesive application mechanism unit 4 is composed of an adhesive discharge unit 40 (discharge nozzle) provided in the lower mold 2 and partially applies the adhesive to the lower surface of the steel plate portion serving as the core material. An adhesive is supplied from the adhesive supply unit 8 to the adhesive application mechanism unit 4.
The outer peripheral punching mechanism 5 includes a punch 50 provided in the upper die 1 and a die 51 provided in the lower die 2, and performs punching of the outer periphery of the core material (separation of the core material). The punch 50 may also serve as a pressing unit that presses (presses) the punched core material y against the lower core material y.

A core material stacking / bonding mechanism 6 for stacking the punched core material y and bonding the core materials with the adhesive is formed in the punched hole 52 of the die 51 constituting the outer peripheral punching mechanism 5 and below the die hole 52. Is provided. The core material stacking / bonding mechanism 6 includes a support 60 that supports the core material below the hole 52, and a heating device 61 (electric heater) for heating the stacked core material to heat and cure the adhesive. Etc.).
Between the upper and lower molds 1 and 2, a plate-like stripper 9 (plate pressing) for pressing the steel plate x against the lower mold 2 when punching is disposed. The stripper 9 has insertion holes 90 and 91 through which the punches 30 and 50 are inserted, and is held by the upper mold 1 by holding means (not shown) having a spring, for example.

Although the apparatus configuration as described above is the same as that of the conventional apparatus, the manufacturing apparatus of the present invention is provided with a holding mechanism 7 that can hold the steel plate x at a position higher than the upper surface of the lower mold. There is a feature in the point. The holding mechanism 7 is preferably provided at least at the steel plate entrance side position and the exit side position of the apparatus main body A in order to stably hold the steel plate x.
Also in this embodiment, the holding mechanism 7 is provided at the steel plate entrance side position and the exit side position of the apparatus main body A. Further, in order to hold the steel plate x more stably, as shown by phantom lines in FIG. 1, the holding mechanism 7 is further provided at each entry position of the adhesive application mechanism portion 4 and / or the outer peripheral punching mechanism portion 5. Is preferably provided.

As shown in FIGS. 2 and 3, each holding mechanism 7 includes a steel plate holder 70 disposed so as to be able to appear and retract in an attachment recess 10 formed on the upper surface side of the lower mold 2, and an attachment recess 10. There is an urging means 71 comprising a spring for urging the steel plate holder 70 upward.
The mounting recess 10 has a slit-like opening 100 along the width direction of the lower mold. The steel plate holder 70 has a flange portion 701 at a lower portion thereof, and is arranged in the mounting recess 10 so that an upper end portion 700 thereof can protrude and retract from the opening portion 100. A biasing means 71 (spring) for supporting the steel plate holder 70 is disposed in the mounting recess 10, and the steel plate holder 70 is biased upward so that the upper end portion 700 protrudes from the opening 100. Further, the steel plate holder 70 is locked in the mounting recess 10 by the flange portion 701 engaging with the inner edge portion of the opening 100.

The steel plate holder 70 may be a rod-shaped member, but preferably has a width for holding the lower surface of the steel plate in the width direction as in the present embodiment from the viewpoint of stably holding the steel plate x. However, when the holding mechanism 7 is provided at the entry side position of the outer peripheral punching mechanism portion 5, the width of the steel plate holder 70 is set so that the steel plate holder 70 does not interfere with the adhesive applied to the lower surface of the steel plate on the upstream side. It is necessary to select an appropriate shape.
In order to prevent the lower surface of the steel sheet coated with the adhesive from coming into contact with the upper surface of the lower mold, the holding mechanism 7 (steel sheet 7) is adjusted so that the distance between the lower surface of the steel sheet and the upper surface of the lower mold is 0.5 mm or more. It is preferable to hold the steel plate x from the holding body 70).
In the holding mechanism 7 of the present invention, a driving means for moving the steel plate holder 70 up and down may be used instead of the urging means 71 formed of a spring or the like as in the above embodiment. As this drive means, for example, a hydraulic actuator or the like can be used, and the steel plate holder 70 is disposed in the mounting recess 10 to support the steel plate holder 70, and the steel plate holder 70 is moved up and down, whereby the steel plate holder 70 is moved. The upper end portion is made to protrude from the upper surface of the lower mold 2. This driving means is controlled to move the steel plate holder 70 up and down in conjunction with the up and down movement of the upper mold 1.

Next, the manufacturing process of the laminated core using the manufacturing apparatus as described above will be described.
In the manufacturing apparatus shown in FIG. 1, the upper mold 1 (movable mold) is lowered with respect to the lower mold 2 for punching the steel plate x and applying the adhesive. At this time, the stripper 9 holds and restrains the steel plate x against the lower mold 2.
Further, the steel plate x is fed into the apparatus main body A by the material feeding mechanism B and is sequentially fed to each process.

  The steel plate x fed into the apparatus main body A is first punched in the punching mechanism portion 3 by the punch 30 and the die 31 except for the outer periphery of the core material (in this embodiment, the inner periphery of the core material). The processing performed here is punching processing of the core material inner periphery and teeth. Note that punching processing other than the outer periphery of the core material may be performed in a plurality of processes. In this case, the punching mechanism unit 3 is provided for each of the plurality of processes, and the steel plates are fed forward. Next, the steel plate x is sent to the adhesive application mechanism unit 4, and the adhesive s is partially applied by the adhesive discharge unit 40 to the lower surface of the steel plate portion serving as the core material. Next, the steel plate x is sent to the outer peripheral punching mechanism unit 5, where punching of the outer periphery of the core material is performed by the punch 50 and the die 51, and the core material y is punched from the steel plate x.

In the punching process of the steel plate x and the application of the adhesive as described above, the holding mechanism 7 positions the steel plate x above the upper surface of the lower die 2 until the upper die 1 is lowered with respect to the lower die 2. However, when the upper die 1 is lowered (becomes activated) for punching and application of adhesive, the stripper 9 resists the urging force of the urging means 71 of the holding mechanism 7. Then, the steel plate holder 70 is pushed down through the steel plate x, and the steel plate x is pressed against the upper surface of the lower mold 2. In this state, punching and adhesive application are performed. When the punching process and the application of the adhesive are completed and the upper die 1 and the stripper 9 are raised, the steel plate holder 70 is raised again by the urging force of the urging means 71, and the steel plate x is attached to the lower die 2. It is held at a position above the upper surface. When the holding mechanism 7 has a driving means for moving the steel plate holder 70 up and down instead of the biasing means 71, the vertical movement of the steel plate holder 70 accompanying the raising and lowering of the upper mold 1 is as follows. This is done by moving the steel plate holder 70 up and down by the driving means.
Therefore, the steel plate x coated with the adhesive s by the adhesive application mechanism unit 4 is sent to the outer peripheral punching mechanism unit 5 while being held at a position higher than the upper surface of the lower mold 2 by the holding mechanism 7. The lower surface of the steel plate coated with the agent s does not come into contact with the lower mold 2.

The core material y punched in the outer peripheral punching mechanism 5 is stacked in the punching hole 52 of the die 51, and the core materials y stacked in the punching hole 52 and in the core material stacking / coupling mechanism section 6 below the punching hole 52 are stacked. Are bonded with the adhesive s. At this time, the punched core material y may be pressed (pressed) against the core material on the lower side to improve the adhesiveness.
In the adhesive application mechanism 4, since the adhesive s is not applied to the steel plate portion constituting the core material y that is the lowermost part of the laminated core, only a predetermined number of core materials y are integrally bonded with the adhesive s. A laminated core z is obtained. The support 60 supports the core material y and the laminated core z laminated below the punched hole 52, and descends each time the punched core material y is laminated. The laminated core z is heated by the heating device 61 to heat and cure the adhesive s between the core materials y.
As described above, according to the manufacturing apparatus of the present invention, since the lower surface of the steel sheet to which the adhesive is applied does not come into contact with the lower mold, it is possible to stably manufacture a laminated core having high lamination strength.

Explanatory drawing which shows one Embodiment of the manufacturing apparatus of this invention Front view of the holding mechanism shown in FIG. Sectional drawing which follows the III-III line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper die 2 Lower die 3 Punching mechanism part 4 Adhesive application mechanism part 5 Peripheral punching mechanism part 6 Core material lamination | stacking / joining mechanism part 7 Holding mechanism 8 Adhesive supply part 9 Stripper 10 Mounting recessed part 30, 50 Punch 31, DESCRIPTION OF SYMBOLS 51 Die 40 Adhesive discharge part 52 Punch hole 60 Support body 61 Heating device 70 Steel plate holder 71 Energizing means 90,91 Insertion hole 100 Opening part 700 Upper end part 701 Flange part A Apparatus main body B Material feed mechanism x Steel plate y Core material z Laminated core s Adhesive

Claims (3)

The device main body (A) composed of the upper and lower molds (1, 2) has a punching mechanism (3) for punching the steel plate other than the outer periphery of the core material, and an adhesive on the lower surface of the steel plate portion that becomes the core material The adhesive coating mechanism (4) to be applied and the outer punching mechanism (5) for punching the outer periphery of the core material on the steel sheet are provided in this order in the steel sheet feeding direction, and the punched core material is laminated. In the manufacturing apparatus having the core material lamination / bonding mechanism (6) for bonding the core materials with the adhesive,
The lower mold (2) is provided with a holding mechanism (7) that can hold the steel plate at a position higher than the upper surface of the lower mold, and the upper end of the holding mechanism (7) can protrude from the upper surface of the lower mold. a steel plate holding member (70), such a manufacturing apparatus of a laminated core which have a drive means for the biasing means or vertical movement (71) for urging the steel plate holder (70) upwards,
The steel plate holder (70) holds the lower surface of the steel plate in the width direction and over the entire width of the steel plate, and the laminated core manufacturing apparatus. At least the apparatus main body (A) apparatus for manufacturing a laminated core according to claim 1, characterized by providing a steel sheet holding mechanism to the inlet side of the position and the exit-side position (7) of the. Furthermore, a holding mechanism is provided so that the steel plate holder (70) does not interfere with the adhesive applied to the lower surface of the steel plate at each entry position of the adhesive application mechanism portion (4) and / or the outer peripheral punching mechanism portion (5). (7) is provided, The manufacturing apparatus of the laminated core of Claim 2 characterized by the above-mentioned.

Images