JP2007190570A - Feeding method and feeding device in press machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feeding method in a press machine, which method can automatically feed thin sheets to the press machine, and can carry out press work with industrially excellent productivity, and further to provide a feeding device. <P>SOLUTION: A feeding device 10 of the press machine is attached to the press machine 12 for pressing one thin sheet material 11 or two or more overlapped thin sheets 11, and comprises a projection forming device 15 which is arranged on the upstream side of the press machine 12, and forms linear projections 14 at least on the leading side 13 of the thin sheet material 11 in the feeding direction of the thin sheet material 11, and a feeding device 16 which is arranged between the projection forming device 15 and the press machine 12, and supplies the thin sheet material 11 having the linear projections 14 formed thereon to the press machine 12. In this feeding method in the press machine, the stiffness of the thin sheet material 11 in the feeding direction to the press machine 12 is enhanced by forming the linear projections 14 on the thin sheet material 11, and then the thin sheet material 11 is fed to the press machine 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to, for example, a press feeding method and equipment for feeding a thin strip material for punching an iron core piece or a lead frame constituting a laminated iron core to a press device.

2. Description of the Related Art Conventionally, a press device has been used as a device for punching a member having a desired shape from a thin strip material and performing press processing such as bending.
For example, a laminated core, which is a punch-formed product obtained by using this press apparatus, is desired to be formed from a thin metal strip in order to improve electromagnetic characteristics. Also, when punching and forming a lead frame having a super-multiple pin, it is advantageous if punching can be performed from a thin metal strip, for example, a strip of 0.18 mm or less.
However, there is a problem that when the sheet material is fed to the press device, the sheet material is bent and it is difficult to automatically feed the sheet material to the press device.
Therefore, as a conventional measure for pressing a thin strip material, for example, in Patent Document 1, a plurality of thin strip materials are stacked and integrated, and sent to a pressing device to punch a plurality of core pieces to manufacture a laminated core. A method is disclosed. Thereby, a plurality of core pieces can be punched and formed at a time from the stacked thin strips, and the productivity of the laminated core can be increased.

JP 2003-153503 A

However, even if a plurality of thin strips are stacked, the rigidity in the feeding direction of the thin strips to the press device is low as in the case of a single plate, so it is difficult to feed the thin strips into the press device without bending, There was still a problem that the press working could not be performed industrially with high productivity.

The present invention has been made in view of such circumstances, and provides a press feeding method and equipment capable of automatically feeding a thin strip material into a press device and capable of industrially performing press working with high productivity. For the purpose.

The press feeding method according to the first invention that meets the above-mentioned object is a press feeding method of feeding a thin sheet material stacked one or more sheets into a pressing device,
A linear protrusion is formed in the feeding direction of the thin strip material on at least the front side of the thin strip material to increase the rigidity of the thin strip material in the feeding direction to the pressing device, and the thin strip material is pressed into the press strip. Send to device.

In the press feeding method according to the first invention, it is preferable that the linear protrusions are formed on one side, both sides, a central portion, one side and a central portion, or both sides and a central portion in the width direction of the thin strip material.
In the press-feeding method according to the first invention, when the thin sheet material stacked two or more is pressed, it is preferable to caulk the thin sheet material in advance before performing the pressing process.

The press-feeding facility according to the second invention that meets the above-mentioned object is a facility that is attached to a pressing device for thin sheet strips laminated one or more sheets,
It is arranged on the upstream side of the pressing device, and a linear protrusion is formed in the feeding direction of the thin strip material on at least the front side of the thin strip material, and the rigidity of the thin strip material in the feeding direction to the pressing device is increased. A protrusion forming device for enhancing
A feeding device that is disposed between the projection forming device and the pressing device and that feeds the thin strip material on which the linear projections are formed to the pressing device;

In the press-feeding equipment according to the second invention, the protrusion forming device forms the linear protrusions on one side, both sides, the center, one side and the center, or both sides and the center of the thin strip material. Is preferred.
In the press-feeding equipment according to the second invention, in the case where the thin strip material stacked two or more is pressed, the thin plate is disposed upstream of the projection forming device or between the projection forming device and the feeding device. It is preferable to arrange a caulking device for caulking the strip.

The press feeding method according to claims 1 to 3 and the press feeding equipment according to claims 4 to 6 feed the thin strip material at least to the front side of the thin strip material before the thin strip material is fed into the press device. For example, even if the thin strip material is extremely thin, it can be fed into the press device without drooping, so that the thin plate material can be fed into the press device. The strip can be pressed with high productivity.
In addition, since the thin strip material is smoothly fed into the press device, a desired product with excellent dimensional accuracy can be formed from the thin strip material fed into the press device. As a result, if the desired product is, for example, a laminated iron core, a product having excellent electromagnetic characteristics can be obtained. If the desired product is a lead frame, a lead frame having a super multi-pin structure can be formed.

In particular, the press feeding method according to claim 2 and the press feeding facility according to claim 5 are, for example, when the width of the thin strip material is narrow, one side in the width direction, and when the width of the thin strip material is wide, the width direction thereof. Form linear protrusions on both sides. Further, when the thin strip material is wide and a desired product is punched and formed in multiple rows by a press device, a linear protrusion is also formed at the center in the width direction. As a result, the rigidity in the feeding direction of the thin strip material to the press device can be effectively increased according to the width of the thin strip material or the punching position of the desired product, so that the thin strip material is not bent to the press device. It can be fed and press working can be performed with high productivity.
Since the press feeding method according to claim 3 and the press feeding facility according to claim 6 can be integrated by caulking two or more thin strip members, the total thickness of the thin strip members can be increased. The rigidity in the feed direction to the press device can be further increased.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory view of the press-feeding equipment according to the first embodiment of the present invention, and FIG. 2 (A) is a plan view of a thin strip material in which linear projections are formed using the press-feeding equipment. , (B) is a cross-sectional view taken along the line XX of (A), FIG. 3 is an explanatory view for punching and forming an iron core piece from a thin strip fed using the press feeding equipment, and FIG. It is explanatory drawing of the press infeed equipment which concerns on 2 embodiment.

As shown in FIG. 1, FIG. 2 (A), (B), the press infeed equipment 10 which concerns on one embodiment of this invention is equipment attached to the press apparatus 12 which press-processes the thin strip material 11, A projection forming device 15 that is arranged on the upstream side of the pressing device 12 and that forms a linear projection 14 in at least the front side 13 of one thin strip material 11 in the feed direction of the thin strip material 11, and the projection forming device 15 And a feeding device 16 that feeds the thin strip 11 on which the linear protrusions 14 are formed to the pressing device 12. The protrusion forming device 15, the feeding device 16, and the pressing device 12 are sequentially arranged with a gap in the feeding direction of the thin strip material 11. In addition, as the thin strip material 11 to be used, there exist an electromagnetic steel plate or an amorphous strip material, for example, and the thickness is 0.1 mm or less, for example. This will be described in detail below.

The protrusion forming device 15 of the press feeding equipment 10 can enter the groove 18 of the lower mold 18 and the lower mold 18 in which the grooves 17 are formed on both sides in the width direction in the traveling direction of the thin strip material 11. A projection forming blade 19 is provided and has an upper mold 20 that can be raised and lowered with respect to the lower mold 18. Thereby, by pressing the upper die 20 against the thin strip member 11 located on the upper surface of the lower die 18, a continuous line on both sides in the width direction of the thin strip member 11 as shown in FIGS. The protrusion 14 can be formed, and the rigidity in the feeding direction of the thin sheet material 11 to the press device 12, that is, the resistance against bending of the thin sheet material 11 can be increased.

The linear protrusions formed on the thin strip material by the protrusion forming device 15 may be formed at least on the front side of the thin strip material, but are preferably formed over the entire feeding direction of the thin strip material. Moreover, although the linear protrusion is formed on both sides in the width direction of the thin strip material, only one side or only the central portion (intermediate) in the width direction of the thin strip material, or even these You may form combining. The linear protrusion continuously protrudes downward, but may protrude upward. Furthermore, although the shape of the linear protrusion has a V-shaped cross section, for example, it may have a concave cross section, a U-shaped cross section, a J-shaped cross section, or an L-shaped cross section. Also good.

The protrusion forming apparatus for forming the linear protrusions on the thin strip material can be configured by a pair of rolls sandwiching the thin strip material from both sides in the thickness direction without forming the lower mold and the upper mold. In this case, a protrusion-forming blade continuous in the circumferential direction is provided at both ends in the width direction of one roll, and a groove is formed in the other roll at a position corresponding to the position of the protrusion. Thereby, a linear protrusion can be formed in the both sides of the width direction of a thin sheet material by pushing a thin sheet material between a pair of rolls. Note that the projection forming apparatus may use a roll provided with a projection forming blade instead of the upper mold.

The feeding device 16 is composed of rolls 21 and 22 that are paired to sandwich the thin strip material 11 from both sides in the thickness direction. The pair of rolls 21 and 22 are positions where the linear protrusions 14 pass, that is, the width of the lower roll 22 so as not to crush the linear protrusions 14 formed on the thin strip material 11 by the protrusion forming device 15. Concave portions that are continuous in the circumferential direction on both sides are formed.
In addition, although the projection forming device and the feeding device are arranged one by one, it is of course possible to arrange one or both of the projection forming device and the feeding device as needed.
Using the press feeding equipment 10 shown above, the projection forming device 15 feeds the pressing device 12 via the feeding device 16 while forming the linear projections on the thin strip material 11.

The press device 12 is a device that performs punching formation of iron core pieces constituting a laminated iron core. Here, the punching formation of the iron core piece will be described with reference to FIG.
First, the thin strip material 11 is fed to the first station by the feeding device 16 and the pilot holes 23 are formed by punching the inner side of the linear protrusions 14 at both sides in the width direction of the thin strip material 11. Next, in the second station, a hole 24 for separating adjacent magnetic pole portions facing inward in the radial direction is formed, and in the third station, the slot 25 is removed. Then, the inner shape is removed at the fourth station, the caulking portion 26 is formed at the fifth station, the outer shape is removed at the sixth station, and the outer core is caulked and laminated on the core pieces that have been previously removed. The first station to the sixth station described above are one process for producing a laminated iron core by forming an iron core piece.

In addition, the linear protrusion 14 shown in FIG. 3 is formed over the whole feed direction of the thin strip material 11. However, the present invention is not limited to this, and it is sufficient that the thin strip material 11 can be transported to the first station or the second station of the press device 12 via the feeding device 16. What is necessary is just to form at least from the rotation center of 16 rolls 21 and 22 to the 1st station which is a processing station of pilot hole 23 of press device 12, or the 2nd station one downstream of it.

Next, a press infeed facility 30 according to a second embodiment of the present invention will be described with reference to FIG. 4, but the same members as the press infeed facility 10 according to the first embodiment of the present invention described above. Are given the same numbers, and detailed explanations are omitted.
The press feeding facility 30 is a facility attached to the press device 12 for feeding two or more (two in the present embodiment) stacked strip members 31 and 32 to the press device 12, and the protrusion forming device. A caulking device 33 for caulking two or more thin strip members 31, 32 is arranged upstream of 15. The caulking device 33 can also be arranged downstream of the projection forming device 15, that is, between the projection forming device 15 and the feeding device 16. Examples of the thin strip materials 31 and 32 used here include an electromagnetic steel plate or an amorphous strip, and the thickness thereof is, for example, 0.1 mm or less.

The caulking device 33 is a device that performs caulking that is normally performed, and is provided with a lower die 35 in which holes 34 are formed on both sides in the width direction, and a protrusion 36 that can enter the hole 34 of the lower die 35. The upper die 37 is movable up and down with respect to the lower die 35. As a result, the upper die 37 is pressed against the thin strip members 31 and 32 positioned on the upper surface of the lower die 35, so that both sides in the width direction of the thin strip members 31 and 32, that is, outside or on the inner side of the planned formation position of the linear protrusion In addition, a caulking portion (not shown) is formed, and the stacked thin strip members 31 and 32 are integrated.
In addition, it can also give a crimping function to the linear protrusion formed in the thin sheet | seat strip arrange | positioned in piles. In this case, the caulking device is unnecessary, and the equipment cost can be reduced, which is economical.

The plate stacking device 38 disposed on the upstream side of the caulking device 33 is composed of a pair of rolls 39 and 40 that sandwich the stacked thin strip members 31 and 32 from both sides in the thickness direction. It also has a function of conveying to the press device 12 side.
As a result, the two thin strip members 31 and 32 sent from different directions are overlapped by the plate stacking device 38 arranged on the upstream side of the caulking device 33 while adjusting the relative position thereof. Sent to the device 33.
With the configuration described above, the thin strips 31 and 32 superposed by the plate superposing device 38 are sent to the caulking device 33 and caulked, and then the linear projection is formed by the projection forming device 15. Then, it is sent to the pressing device 12 through the feeding device 16 and desired pressing is performed.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, a case where the press feeding method and the equipment of the present invention are configured by combining a part or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
Moreover, in the said embodiment, although the case where the core piece which comprises a lamination | stacking iron core was punched out from the sent thin strip material was demonstrated, other formed articles, for example, a lead frame, can also be punched out.

It is explanatory drawing of the press infeed equipment which concerns on the 1st Embodiment of this invention. (A) is a top view of the thin strip material which formed the linear protrusion using the press infeed equipment, (B) is XX arrow sectional drawing of (A). It is explanatory drawing which punches and forms an iron core piece from the thin sheet | seat strip fed using the press infeed equipment. It is explanatory drawing of the press infeed equipment which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

10: Press feeding equipment, 11: Thin strip material, 12: Press device, 13: Front side, 14: Linear projection, 15: Projection forming device, 16: Feeding device, 17: Groove, 18: Lower die, 19: Projection forming blade, 20: upper die, 21, 22: roll, 23: pilot hole, 24: punching hole, 25: slot, 26: caulking part, 30: press feeding equipment, 31, 32: thin strip material, 33: Caulking device, 34: hole, 35: lower die, 36: protrusion, 37: upper die, 38: plate stacking device, 39, 40: roll

Claims (6)

In the press-in method for feeding one or more thin strips into a press device,
A linear protrusion is formed in the feeding direction of the thin strip material on at least the front side of the thin strip material to increase the rigidity of the thin strip material in the feeding direction to the pressing device, and the thin strip material is pressed into the press strip. A press feeding method characterized by feeding to an apparatus. 2. The press feeding method according to claim 1, wherein the linear protrusion is formed on one side, both sides, a central portion, one side and a central portion, or both sides and a central portion in the width direction of the thin strip material. Method. In the press feeding method according to any one of claims 1 and 2, in the case of pressing the thin strip material that is stacked two or more, the thin strip material is caulked in advance before the press processing. A featured press feeding method. It is a facility attached to a pressing device for thin sheet material stacked one or more sheets,
It is arranged on the upstream side of the pressing device, and a linear protrusion is formed in the feeding direction of the thin strip material on at least the front side of the thin strip material, and the rigidity of the thin strip material in the feeding direction to the pressing device is increased. A protrusion forming device for enhancing,
A press feeding facility, comprising: a feeding device that is disposed between the projection forming device and the pressing device and feeds the thin strip material on which the linear projection is formed to the pressing device. 5. The press-feeding equipment according to claim 4, wherein the protrusion forming device forms the linear protrusions on one side, both sides, a central portion, one side and a central portion, or both sides and a central portion in the width direction of the thin strip material. Characteristic press feeding equipment. In the press-feeding equipment according to any one of claims 4 and 5, when pressing the thin sheet material stacked two or more, the upstream side of the projection forming device or the projection forming device and the feed A press-feeding facility, wherein a caulking device for caulking the thin sheet material is disposed between the devices.

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