WO2018056259A1

WO2018056259A1 - Processing device for thin plate material and processing method for same

Info

Publication number: WO2018056259A1
Application number: PCT/JP2017/033716
Authority: WO
Inventors: 謙一郎岩田
Original assignee: 株式会社三井ハイテック
Priority date: 2016-09-20
Filing date: 2017-09-19
Publication date: 2018-03-29
Also published as: JP6577924B2; CN210172399U; JP2018047474A

Abstract

The purpose of the present invention is to provide a processing device for thin plate material that can perform stable punch processing without reducing productivity, and a processing method for the same. Provided are a processing device (10) for thin plate material having an upper mold (12) provided with a punch (11), a lower mold (60) provided with a die (61), and a stripper plate (15) that can be raised and lowered with the upper mold (12), pushes the thin plate material (13) against the lower mold (60) during punch processing, and guides a tip part of the punch (11) into a die hole (62), and a processing method for the same, wherein pilot pins (21) passing through the stripper plate (15) are inserted into pilot holes formed in a region other than both end parts in the direction of width of the thin plate material and the thin plate material is positioned and punched, after which when the stripper plate (15) is pulled and separated from the thin plate material, the pilot pins (21) are pulled out of the pilot holes while making pressing members (27) provided at the peripheral parts of the pilot pins (21) protrude from the stripper plate (15) and press on the surface of the thin plate material.

Description

Thin plate material processing apparatus and processing method thereof

The present invention relates to a thin plate material processing apparatus that performs a preset punching process on a thin plate material using a mold, and a processing method thereof.

For example, a laminated iron core is manufactured by sequentially laminating a plurality of iron core pieces punched and formed from a strip-shaped thin plate material (strip material) using a mold.
When punching an iron core piece from a thin plate material, pilot holes are punched and formed at both ends in the width direction of the thin plate material, and then pilot pins are inserted into the pilot holes to position the thin plate material with respect to the mold. , Punching iron core pieces. When punching multiple core pieces in the width direction of the thin plate material (when multi-rowing is performed) or punching core pieces from a wide thin plate material, not only the width direction both ends but also the width direction A pilot hole is also formed in the central portion, and a pilot pin is inserted through the pilot hole to position the thin plate material with respect to the mold (see, for example, Patent Document 1).

Japanese Patent No. 5719979

By the way, when a thin plate material is punched and formed by a mold, the thin plate material moves in the mold while being guided by guide rails and guide rollers disposed on both sides in the width direction of the thin plate material. For this reason, when the pilot pin is pulled out from the pilot hole formed at both ends in the width direction of the thin plate material, the thin plate material rises together with the pilot pin. The movement of the thin plate material with the pilot pin can be prevented by the guide rail and the guide roller (the material can be peeled off).
On the other hand, when the pilot pin is pulled out from the pilot hole formed in the center in the width direction of the thin plate material, there is no guide rail or guide roller. For this reason, there exists a possibility that a thin plate material may be caught by a pilot pin, and may raise (material peeling cannot be performed), and it may become a factor which causes the fall of productivity.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a thin plate material processing apparatus and a processing method thereof capable of performing stable punching without reducing productivity.

An apparatus for processing a thin plate material according to the first aspect of the present invention comprises an upper mold having a punch, a lower mold having a die in which a die hole is paired with the punch, and the upper mold. In a processing apparatus for a thin plate material, which can be moved up and down together with a mold, presses the thin plate material against the lower mold at the time of punching, and has a stripper plate for guiding the tip of the punch to the die hole.
The stripper plate is inserted with a pilot pin that can be inserted into a pilot hole formed in a region excluding both end portions in the width direction of the thin plate material, and the stripper from the thin plate material to the periphery of the pilot pin. There is provided a pressing member that protrudes from the stripper plate and can press the surface of the thin plate when the plate is pulled apart.

The thin plate material processing method according to the second aspect of the present invention is characterized in that a punch is provided in an upper die, and a die having a die hole formed in a pair with the punch is provided in a lower die, together with the upper die. In the processing method of the thin plate material that presses the thin plate material against the lower mold at the time of punching by the stripper plate that moves up and down, and guides the tip of the punch to the die hole,
After the pilot pin inserted through the stripper plate is inserted into a pilot hole formed in a region excluding both ends in the width direction of the thin plate material, the thin plate material is positioned, and the thin plate material is punched.
When pulling the stripper plate away from the thin plate material, a pressing member provided at the periphery of the pilot pin protrudes from the stripper plate and presses the surface of the thin plate material, and from the pilot hole, the pilot pin Pull out.

According to the thin plate material processing apparatus and the processing method thereof according to the present invention, the pilot pin can be smoothly extracted from the pilot hole when the stripper plate is pulled away from the thin plate material. Accordingly, stable punching can be performed without reducing productivity.

It is explanatory drawing of the processing apparatus of the thin-plate material which concerns on the 1st Embodiment of this invention. It is a top view of the thin plate material which punches with the processing apparatus of a thin plate material. It is explanatory drawing of the processing method of a thin-plate material using the processing apparatus shown in FIG. It is explanatory drawing of the processing method of a thin-plate material using the processing apparatus shown in FIG. It is explanatory drawing of the processing method of a thin-plate material using the processing apparatus shown in FIG. It is explanatory drawing of the processing method of a thin-plate material using the processing apparatus shown in FIG. It is explanatory drawing of the processing apparatus of the thin plate material which concerns on the 2nd Embodiment of this invention. It is explanatory drawing of the processing apparatus of the thin plate material which concerns on the 3rd Embodiment of this invention. It is the elements on larger scale which show the stripper member of the processing apparatus of the thin-plate material shown in FIG.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 and 2, a thin plate material processing apparatus (hereinafter, also simply referred to as a processing apparatus) 10 according to a first embodiment of the present invention includes an upper mold 12 provided with a punch 11, a punch 11 and a lower mold 60 provided with a die 61 that is paired with 11. The die 61 is formed with a die hole 62 through which the tip of the punch 11 is guided. The processing apparatus 10 is an apparatus that can carry out the punching of the thin plate material 13 by the upper mold 12 and the lower mold 60. In FIG. 1, for convenience of explanation, the upper mold 12 is illustrated as being opened apart from the lower mold 60 (the same applies to FIGS. 7 and 8 described later). This will be described in detail below.

A thin plate material 13 shown in FIG. 2A is a strip material (band-shaped plate material) used for punching out the core pieces constituting the laminated core. The thin plate material 13 is made of, for example, an electromagnetic steel plate or amorphous, and has a thickness of 0.10 mm to 1.0 mm. The thin plate material 13 has low rigidity in a state before punching or after punching. For example, when placed in a free state, the rigidity is such that the central portion hangs down from both end portions in the width direction orthogonal to the length direction (feed direction) of the thin plate member 13. Examples of the type of the thin plate material 13 include a wide plate and a plate in which a plurality of core pieces are punched in the width direction.
The thin plate material 13 is not particularly limited as long as it has low rigidity before and after the punching process. For example, it may be used for punching a lead frame or may not be a strip (rectangular or square).

The thin plate material processing apparatus 10 is provided such that the upper mold 12 can be moved up and down relative to the lower mold 60.
A stripper member 14 capable of pressing and holding the thin plate material 13 passing over the lower mold 60 is attached to the upper mold 12 via a spring 33 on the side facing the lower mold 60. The tensile strength (hardness) of the spring 33 is such that it is in an extended state in the free state. The stripper member 14 includes a stripper plate 15 that can be pressed against the surface (upper surface) of the thin plate member 13, and a stripper holder 16 disposed on the back surface side (upper mold 12 side) of the stripper plate 15. . The stripper plate 15 is held by a stripper holder 16. Thereby, the stripper member 14 (stripper plate 15) can be moved up and down together with the upper mold 12.

The upper mold 12 has a punch holder 17.
A punch plate 19 is attached to the punch holder 17 on the side facing the lower mold 60 via a punch backing (punch receiving member) 18.
The punch plate 19 is a plate that holds the punch 11, and the base side of the punch 11 is attached to the punch plate 19. The punch 11 is fixed so as not to come out of the punch plate 19 by a fixing member (retainer) 20 attached to the surface side of the punch plate 19 (opposite side to the lower mold 60). Note that the punch 11 penetrates the stripper member 14 and the tip thereof can project to the lower mold 60 side. When punching is not performed, for example, as shown in FIG. 1, the tip of the punch 11 is housed in a stripper member 14.

The punch plate 19 has a function of holding the pilot pins 21.
The pilot pin 21 is inserted (disposed through) through the stripper member 14 (stripper plate 15). The pilot pin 21 can be inserted into a pilot hole 23 formed in a region 22 excluding both ends in the width direction of the thin plate member 13 shown in FIG.
Further, the pilot pin 21 is disposed on the punch holder 17 via a spring 25 in a state of penetrating the punch backing 18 and the punch plate 19. The tensile strength (hardness) of the spring 25 is in an extended state in a free state. The pilot pin 21 is fixed by a fixing member 24 attached to the stripper holder 16 so as not to come off from the upper mold 12 (punch plate 19). Thereby, the pilot pin 21 can be moved up and down with respect to the punch holder 17.

As described above, the pilot pin 21 is provided as a pin that can be inserted into the pilot hole 23 formed in the region 22 excluding both ends in the width direction of the thin plate member 13, but is not limited thereto. . For example, the pilot pin 21 may be provided separately from the pilot pin 21 as a pilot pin that can be inserted into the pilot hole 26 formed at both ends in the width direction of the thin plate member 13 shown in FIG. In that case, a separately provided pilot pin may have the same configuration as the pilot pin 21.
Here, the region 22 excluding both end portions in the width direction of the thin plate material 13 means a central portion in the width direction of the thin plate material 13. The pilot hole 23 formed in the central portion in the width direction of the thin plate 13 is, for example, along the length direction of the thin plate 13 as shown in FIG. It may be arranged in one row. Moreover, as shown to (B) of FIG. 2, you may arrange | position to the multiple rows (here 2 rows) which have a space | interval in the width direction along the length direction of the thin-plate material 13a.

With the above configuration, when the thin plate material 13 is punched, the thin plate material 13 can be punched in a state of being pressed against the lower mold 60 by the stripper member 14 (stripper plate 15). At this time, the tip of the punch 11 is guided to the die hole 62 by the stripper plate 15.
After punching out the thin plate material 13, the stripper member 14 is pulled away from the thin plate material 13, and the pilot pins 21 are pulled out from the pilot holes 23 of the thin plate material 13. At this time, as described above, since the thin plate member 13 has low rigidity before and after the punching process, the pilot pin 21 may be caught in the pilot hole 23 and the central portion in the width direction of the thin plate member 13 may be raised.

Therefore, the stripper member 14 is provided with a pressing pin (an example of a pressing member) 27 that can press the surface of the thin plate material 13 in order to easily pull out the pilot pin 21 from the pilot hole 23.
The pressing pin 27 includes a pressing portion 28 having a circular cross section and a holding portion 29 having a circular cross section which is provided integrally on the base side of the pressing portion 28 and has a diameter larger than that of the pressing portion 28. The shape of the pressing pin 27 is formed in a T shape in a side view. The pressing portion 28 is inserted into a through hole 30 formed in the stripper plate 15 so as to be slidable in the vertical direction (up and down direction). The holding portion 29 is inserted into a through hole 31 formed in the stripper holder 16 so as to be slidable in the vertical direction (up and down direction).

The pressing portion 28 is formed such that its axial length is longer than the thickness of the stripper plate 15. For this reason, the pressing portion 28 inserted through the through-hole 30 has a tip that can protrude from the surface of the stripper plate 15 toward the lower mold 60. Further, in the through hole 31 of the stripper holder 16, a spring (elastic member) 32 that is in an extended state in a free state is accommodated in a state in which the holding portion 29 of the pressing pin 27 is pressed toward the lower mold 60 side. . The spring 32 is held in the through hole 31 by closing the upper opening of the through hole 31 with the fixing member 24.
Thus, when punching is not performed, the upper mold 12 is opened and the spring 32 is in an extended state, and the tip of the pressing portion 28 protrudes from the surface of the stripper plate 15 toward the lower mold 60 so that the thin plate material 13 is formed. Press the surface. On the other hand, when punching is performed, the upper mold 12 is closed, the stripper member 14 is pressed against the lower mold 60, and the tip of the pressing portion 28 is accommodated in the through hole 30 of the stripper plate 15.

If the pilot pin 21 can be pulled out from the pilot hole 23, the pressing pin 27 such as the cross-sectional area of the pressing portion 28 (contact area with the thin plate 13) and the cross-sectional shapes of the pressing portion 28 and the holding portion 29. The shape is not limited to the above shape.
The protruding length of the pressing pin 27 protruding from the surface of the stripper plate 15 may be a length that allows the pilot pin 21 to be pulled out from the pilot hole 23. For example, the protruding length of the pressing pin 27 is shorter than the protruding length of the pilot pin 21 and is not less than 0.1 mm and not more than 2 mm.
A plurality of pressing pins 27 are arranged around the pilot pin 21 (two are shown in FIG. 1). These pressing pins 27 may be arranged at equal intervals or at different intervals. If the pilot pin 21 can be pulled out from the pilot hole 23, the number of the pressing pins 27 may be one.

Further, the pressing pin 27 is provided at a predetermined distance from the pilot pin 21 in a peripheral portion of the pilot pin 21 in a plan view in order to easily pull out the pilot pin 21 from the pilot hole 23. The distance between the axes of the pilot pin 21 and the pressing pin 27 is, for example, 5 mm or more and 20 mm or less.
Therefore, the configuration of the pressing pin 27 described above is suitable for use in a case where a space where the pressing portion 28 of the pressing pin 27 can contact the thin plate material 13, that is, a region where the thin plate material 13 is not punched can be secured. Yes. As described above, according to the thin plate material processing apparatus 10, since the pressing pin 27 is provided in the peripheral portion of the pilot pin 21, when the stripper plate 15 is pulled away from the thin plate material 13, the pilot pin 21 is removed from the pilot hole 23. Can be pulled out smoothly.

Next, a thin plate material processing method according to the first embodiment of the present invention will be described with reference to FIG. 2A and FIGS.
First, the thin plate material 13 is fed into a mold (not shown), pilot holes 23 are formed at a predetermined pitch in the center in the width direction, and pilot holes 26 are formed at a predetermined pitch at both ends in the width direction (see FIG. 2 (A)).
Next, the thin plate material 13 in which the pilot holes 23 and 26 are formed is fed between the upper mold 12 and the lower mold 60, and the upper mold 12 is moved up and down with respect to the lower mold 60, and the iron core piece ( Punch out (not shown). Hereinafter, a method for punching the iron core piece will be described in detail.

First, as shown in FIG. 3, the upper mold 12 is lowered with respect to the lower mold 60.
As a result, the stripper member 14 is lowered together with the upper mold 12 by the elastic force of the spring 25 and the spring 33, the pilot pin 21 is inserted into the pilot hole 23 of the thin plate material 13, and the positioning of the thin plate material 13 with respect to the lower mold 60. Is made. A pilot pin (not shown) is similarly inserted into the pilot hole 26.
Then, the surface (lower surface) of the stripper plate 15 comes into contact with the surface of the thin plate material 13, and the thin plate material 13 is pressed against the lower mold 60. At this time, the distal end portion of the pressing portion 28 of the pressing pin 27 is pressed by the lower mold 60 and accommodated in the through hole 30 of the stripper plate 15.

Subsequently, as shown in FIG. 4, the upper mold 12 is further lowered.
As a result, the spring 25 and the spring 33 are contracted to narrow the gap between the upper mold 12 and the stripper member 14, and the punch 11 penetrates the stripper member 14 and the tip end portion of the punch 11 protrudes from the stripper plate 15. At this time, the protruding tip end portion of the punch 11 is guided by the stripper plate 15 to the die hole 62 of the lower mold 60, and the thin plate material 13 is punched out.

After performing a predetermined punching process on the thin plate material 13 by the above-described method, the upper mold 12 is raised with respect to the lower mold 60 as shown in FIG.
As the upper mold 12 is raised, the space between the upper mold 12 and the stripper member 14 is expanded by the elastic force of the spring 25 and the spring 33, and the tip of the punch 11 is pulled out from the die hole 62, so that the inside of the stripper plate 15 Is housed. At this time, the surface of the stripper plate 15 is maintained in contact with the surface of the thin plate material 13.

Subsequently, as shown in FIG. 6, the upper mold 12 is further raised.
Thereby, the stripper member 14 is also raised, and the stripper plate 15 is pulled away from the surface of the thin plate material 13.
At this time, the pilot pin 21 is pulled out from the pilot hole 23, and a pilot pin (not shown) is also pulled out from the pilot hole 26.

Further, the tip of the pressing portion 28 of the pressing pin 27 protrudes from the surface of the stripper plate 15 by the elastic force of the spring 32. For this reason, the pilot pin 21 can be pulled out from the pilot hole 23 while pressing the surface of the central portion in the width direction of the thin plate 13 with the tip of the protruding pressing portion 28. Thereby, even if the pilot pin 21 is caught in the pilot hole 23, the hook can be removed by the pressure applied from the pressing portion 28, and the pilot pin 21 can be smoothly pulled out from the pilot hole 23.
By sequentially performing the above operations while feeding the thin plate material 13, a core piece having a predetermined shape can be formed from the thin plate material 13 by punching. A plurality of punched iron core pieces are laminated to form a laminated iron core.

Next, a thin plate material processing apparatus 40 according to a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same member as the processing apparatus 10 of the said 1st Embodiment, and a different structure is demonstrated in detail.

The stripper member 14 a is provided with a pressing ring (an example of a pressing member) 41 that can press the surface of the thin plate member 13 in order to pull the stripper member 14 away from the thin plate member 13 and to easily pull out the pilot pin 21 from the pilot hole 23. It has been. The stripper member 14 a has the same function as the stripper member 14 of the processing apparatus 10.
The pressing ring 41 includes a cylindrical pressing portion 42 and a cylindrical holding portion 43 that is integrally provided on the base side of the pressing portion 42 and has a diameter larger than that of the pressing portion 42. A tip end portion of the pilot pin 21 is inserted into the pressing ring 41. The inner diameter of the pressing part 42 and the inner diameter of the holding part 43 are the same.

The pressing portion 42 is inserted in a through hole 44 formed in the stripper plate 15a so as to be slidable in the vertical direction (lifting direction). The holding portion 43 is inserted into a through hole 45 formed in the stripper holder 16a so as to be slidable in the vertical direction (lifting direction). The stripper plate 15a and the stripper holder 16a have the same functions as the stripper plate 15 and the stripper holder 16 of the processing apparatus 10, respectively.

The pressing portion 42 is formed such that its axial length is longer than the thickness of the stripper plate 15a. For this reason, the pressing portion 42 inserted into the through hole 44 has a tip portion that can protrude from the surface of the stripper plate 15a to the lower mold 60 side. The protruding length of the pressing ring 41 protruding from the surface of the stripper plate 15a is the same as that of the pressing pin 27 of the processing apparatus 10.
Further, in the through hole 45 of the stripper holder 16a, a spring (elastic member) 46 which is in an extended state in a free state is accommodated in a state where the holding portion 43 of the pressing ring 41 is pressed toward the lower mold 60 side. . The spring 46 is held in the through hole 45 by closing the upper opening of the through hole 45 with the fixing member 24. The tip of the pilot pin 21 is inserted into the spring 46.

Thus, when punching is not performed, the upper mold 12 is opened and the spring 46 is in an extended state, and the distal end portion of the pressing portion 42 protrudes from the surface of the stripper plate 15a toward the lower mold 60 so that the thin plate material 13 is formed. Press the surface. On the other hand, when punching is performed, the upper mold 12 is closed, the stripper member 14a is pressed against the lower mold 60, and the tip of the pressing portion 42 is accommodated in the through hole 44 of the stripper plate 15a.
As described above, the pressing ring 41 is disposed in proximity to the pilot pin 21 so as to surround the pilot pin 21. For this reason, the pressing ring 41 is suitable for use when it is not possible to secure a space in which the pressing portion 42 of the pressing ring 41 can contact the thin plate material 13.

Subsequently, a thin plate material processing method according to the second embodiment of the present invention will be described with reference to FIG. In addition, since the processing method of the thin plate material of this embodiment is substantially the same as the processing method of the thin plate material according to the first embodiment, after the punching processing of the different thin plate material 13 (rise of the upper mold 12) Will be described.

After performing a predetermined punching process on the thin plate material 13, the upper die 12 is raised with respect to the lower die 60, whereby the tip end portion of the punch 11 is accommodated in the stripper plate 15 a. At this time, the surface of the stripper plate 15a is maintained in contact with the surface of the thin plate material 13.
Subsequently, the upper mold 12 is further raised.
As a result, the stripper member 14 a is also raised, and the stripper plate 15 a is pulled away from the surface of the thin plate material 13. At this time, the pilot pin 21 is pulled out from the pilot hole 23.

Further, due to the elastic force of the spring 46, the tip of the pressing portion 42 of the pressing ring 41 protrudes from the surface of the stripper plate 15a. For this reason, the pilot pin 21 can be pulled out from the pilot hole 23 while pressing the surface of the central portion in the width direction of the thin plate 13 with the tip of the protruding pressing portion 42. Thereby, even if the pilot pin 21 is caught in the pilot hole 23, the hook can be removed by the pressure applied from the pressing portion 42, and the pilot pin 21 can be smoothly pulled out from the pilot hole 23.

Next, a thin plate material processing apparatus 50 according to a third embodiment of the present invention will be described with reference to FIGS. 8 and 9. In addition, the same code | symbol is attached | subjected to the same member as the processing apparatus 40 of the said 2nd Embodiment, and a different structure is demonstrated in detail.

The stripper member 14 b is provided with a pressing ring 41 that can press the surface of the thin plate member 13 in order to pull the stripper member 14 away from the thin plate member 13 and to easily pull out the pilot pin 21 from the pilot hole 23. The pressing ring 41 is provided on the stripper plate 15b via a bush 51. The stripper member 14b has the same function as the stripper member 14 of the processing apparatus 10. Further, the stripper plate 15 b has the same function as the stripper plate 15 of the processing apparatus 10.

The stripper member 14b includes a stripper plate 15b and a stripper holder 16b. The stripper plate 15b is configured to be slidable (movable) in the horizontal direction with respect to the stripper holder 16b. The stripper holder 16b has the same function as the stripper holder 16 of the processing apparatus 10.
Thereby, the axial center position of the front-end | tip part of the punch 11 guided by the die hole 62 can be adjusted by sliding the stripper plate 15b with respect to the stripper holder 16b in a horizontal direction. The axial position of the tip of the punch 11 can also be adjusted by providing an eccentric bush on the stripper plate (see, for example, Japanese Patent Application No. 2015-256876).

The length of the bush 51 is the same as the thickness of the stripper member 14b (the combined thickness of the stripper plate 15b and the stripper holder 16b). The bush 51 is provided in a state of penetrating the stripper member 14b, and the base side thereof is attached to the stripper holder 16b. The bush 51 is held in the stripper holder 16b by a fixing member 24 attached to the stripper holder 16b.

Moreover, the front-end | tip part of the bush 51 is arrange | positioned at the through-hole 52 formed in the stripper plate 15b. When the bush 51 and the through hole 52 are arranged on the same axis, a gap S is formed between the outer peripheral surface of the bush 51 and the inner peripheral surface of the through hole 52. The width of the gap S may be set in consideration of the range in which the stripper plate 15b can move horizontally with respect to the stripper holder 16b. For example, the width of the gap S is 0.1 mm or more and 0.5 mm or less.
Thus, even if the stripper plate 15b is moved with respect to the stripper holder 16b in order to adjust the axial center position of the tip end portion of the punch 11, the bush 51 can be moved relative to the stripper plate 15b, so that the position of the bush 51 is fixed. can do.

The pressing portion 42 of the pressing ring 41 is slidably inserted into a through hole 53 formed in the bush 51. The holding portion 43 is slidably inserted into a through hole 54 formed in the bush 51.
In the through hole 54 of the bush 51, a spring (elastic member) 55 that is in an extended state in a free state is accommodated in a state where the holding portion 43 is pressed toward the lower mold 60. The spring 55 is held in the through hole 54 by closing the upper opening of the through hole 54 with the fixing member 24. The tip of the pilot pin 21 is inserted into the spring 55.

Thus, when punching is not performed, the upper mold 12 is opened and the spring 55 is in an extended state, and the distal end portion of the pressing portion 42 protrudes from the surface of the stripper plate 15b toward the lower mold 60 so that the thin plate material 13 is formed. Press the surface. On the other hand, when punching is performed, the upper mold 12 is closed, the stripper member 14b is pressed against the lower mold 60, and the tip of the pressing portion 42 is accommodated in the through hole 53 of the stripper plate 15b.
Further, regarding the adjustment of the axial center position of the tip of the punch 11, since the position of the pilot pin 21 does not move because the gap S is provided, the thin plate material 13 can be positioned reliably.

Subsequently, a thin plate material processing method according to a third embodiment of the present invention will be described with reference to FIGS. 8 and 9. The thin plate material processing method of the present embodiment is substantially the same as the thin plate material processing method according to the first and second embodiments, and therefore, after the punching of the different thin plate material 13 (upper mold 12). Will be explained.

After performing a predetermined punching process on the thin plate material 13, the upper die 12 is raised with respect to the lower die 60, whereby the tip end portion of the punch 11 is accommodated in the stripper plate 15 b. At this time, the surface of the stripper plate 15 b is maintained in contact with the surface of the thin plate material 13.
Subsequently, the upper mold 12 is further raised.
As a result, the stripper member 14 b is also raised, and the stripper plate 15 b is pulled away from the surface of the thin plate material 13. At this time, the pilot pin 21 is pulled out from the pilot hole 23.

Further, due to the elastic force of the spring 55, the tip of the pressing portion 42 of the pressing ring 41 protrudes from the surface of the stripper plate 15b. For this reason, the pilot pin 21 can be pulled out from the pilot hole 23 while pressing the surface of the central portion in the width direction of the thin plate member 13 with the tip of the pressing portion 42. Thereby, even if the pilot pin 21 is caught in the pilot hole 23, the hook can be removed by the pressure applied from the pressing portion 42, and the pilot pin 21 can be smoothly pulled out from the pilot hole 23.

Further, when adjusting the axial center position of the tip of the punch 11, the position of the pilot pin 21 does not move because the gap S is provided, so that only the position adjustment of the punch 11 can be performed.
This eliminates the need to manufacture the stripper plate 15b separately from the punch 11 portion and the pilot pin 21 portion (because they can be manufactured integrally), thereby reducing the manufacturing cost. Further, every time the position of the punch 11 is adjusted, it is not necessary to reconstruct the pressing ring 41 and to correct the stripping of the stripper plate 15b associated therewith. For this reason, for example, it is possible to shorten the time for mold adjustment, reduce the cost, and shorten the delivery time associated with the shortening of the manufacturing time.

From the above, stable punching can be performed without lowering the productivity by the thin plate material processing apparatus and the processing method of the present invention.

As described above, the thin plate material processing apparatus according to the first aspect of the present invention includes an upper mold having a punch, a lower mold having a die paired with the punch, and the upper mold. And a stripper plate that presses the thin plate material against the lower mold during punching and guides the tip of the punch into a die hole formed in the die, and the stripper plate In a thin plate material processing apparatus having a pilot pin that is penetrated and can be inserted into a pilot hole formed in a region excluding both end portions in the width direction of the thin plate material,
A pressing member that protrudes from the stripper plate and presses the surface of the thin plate material when the stripper plate is pulled away from the thin plate material is provided around the pilot pin.

In the thin plate material processing apparatus according to the first aspect of the present invention, the pressing member may be composed of a single or a plurality of pressing pins, and the pressing pins may be provided at intervals from the pilot pins.

In the thin plate material processing apparatus according to the first aspect of the present invention, the pressing member is formed of a cylindrical pressing ring, and the pilot pin can be inserted and disposed in the pressing ring.
Here, it is preferable that the pressing ring is provided on the stripper plate via a bush, and the bush is provided so as to be relatively movable with a gap with respect to the stripper plate.

The thin plate material processing method according to the second aspect of the present invention includes a stripper plate that is provided with a punch in an upper mold and a die that is paired with the punch in a lower mold, and moves up and down together with the upper mold. In the processing method of the thin plate material that presses the thin plate material against the lower mold during the punching process and guides the tip of the punch to the die hole formed in the die,
The pilot pin inserted through the stripper plate is inserted into a pilot hole formed in a region excluding both end portions in the width direction of the thin plate material, the thin plate material is positioned, and the thin plate material is punched,
When pulling the stripper plate away from the thin plate material, a pressing member provided at the periphery of the pilot pin protrudes from the stripper plate and presses the surface of the thin plate material, and from the pilot hole, the pilot pin Pull out.

In the thin plate material processing method according to the second aspect of the invention, the pressing member may be composed of a single or a plurality of pressing pins, and the pressing pins may be provided at intervals from the pilot pins.

In the thin plate material processing method according to the second aspect of the present invention, the pressing member is formed of a cylindrical pressing ring, and the pilot pin can be inserted and disposed in the pressing ring.
Here, the pressing ring is provided on the stripper plate via a bush, and when adjusting the axial center position of the tip of the punch by the stripper plate in the punching process of the thin plate material, It is preferable to move relative to the stripper plate.

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, the case where the thin plate material processing apparatus and the processing method of the present invention are configured by combining some or all of the above-described embodiments and modifications are also included in the scope of the present invention.
In the above-described embodiment, the case where the pressing pin and the pressing ring are provided in the peripheral portion of the pilot pin that can be inserted into the pilot hole formed in the central portion in the width direction of the thin plate material has been described, but the present invention is not limited thereto. For example, not only in the periphery of the pilot pin but also in a pilot hole that can be inserted into pilot holes (pilot holes 26 shown in FIGS. 2A and 2B) formed at both ends in the width direction of the thin plate material. A pressing pin or a pressing ring can be provided around the periphery of the pin.

This application is based on a Japanese patent application filed on September 20, 2016 (Japanese Patent Application No. 2016-182766), the contents of which are incorporated herein by reference.

According to the thin plate material processing apparatus and the processing method thereof according to the present invention, the pilot pin can be smoothly extracted from the pilot hole when the stripper plate is pulled away from the thin plate material.

10, 40, 50: Thin plate material processing apparatus, 11: Punch, 12: Upper mold, 13, 13a: Thin plate material, 14, 14a, 14b: Stripper member, 15, 15a, 15b: Stripper plate, 16, 16a 16b: Stripper holder, 17: Punch holder, 18: Punch backing, 19: Punch plate, 20: Fixing member, 21: Pilot pin, 22: Area, 23: Pilot hole, 24: Fixing member, 25, 32, 33 46, 55: Spring, 26: Pilot hole, 27: Pressing pin (pressing member), 28: Pressing part, 29: Holding part, 30, 31, 44, 45, 52, 53, 54: Through hole, 41: Press ring (pressing member), 42: pressing part, 43: holding part, 51: bush, 60: lower mold, 61: die, 62: die hole

Claims

An upper mold provided with a punch, a lower mold provided with a die paired with the punch, and the upper mold can be moved up and down, and a thin plate material is pressed against the lower mold during punching. And a stripper plate that guides the tip of the punch into a die hole formed in the die, and a pilot hole that is penetrated by the stripper plate and formed in a region excluding both ends in the width direction of the thin plate material. In a thin plate material processing apparatus having a pilot pin that can be inserted,
The processing of the thin plate material is characterized in that a pressing member is provided around the pilot pin so as to protrude from the stripper plate and press the surface of the thin plate material when the stripper plate is pulled away from the thin plate material. apparatus.
2. The thin plate material processing apparatus according to claim 1, wherein the pressing member is composed of a single or a plurality of pressing pins, and the pressing pins are provided at intervals from the pilot pins.
The thin plate material processing apparatus according to claim 1, wherein the pressing member includes a cylindrical pressing ring, and the pilot pin is inserted and disposed in the pressing ring.
The thin plate member according to claim 3, wherein the pressing ring is provided on the stripper plate via a bush, and the bush is provided to be movable relative to the stripper plate with a gap. Processing equipment.
A punch is provided on the upper die, a die that is paired with the punch is provided on the lower die, and a stripper plate that moves up and down together with the upper die presses the thin plate material against the lower die at the time of punching, In the processing method of the thin plate material for guiding the tip of the punch to the die hole formed in the die,
The pilot pin inserted through the stripper plate is inserted into a pilot hole formed in a region excluding both end portions in the width direction of the thin plate material, the thin plate material is positioned, and the thin plate material is punched,
When pulling the stripper plate away from the thin plate material, a pressing member provided at the periphery of the pilot pin protrudes from the stripper plate and presses the surface of the thin plate material, and from the pilot hole, the pilot pin A method of processing a thin plate material, characterized by drawing out a sheet.
6. The method for processing a thin plate material according to claim 5, wherein the pressing member is constituted by a single or a plurality of pressing pins, and the pressing pins are provided at intervals from the pilot pins.
6. The method for processing a thin plate material according to claim 5, wherein the pressing member is formed of a cylindrical pressing ring, and the pilot pin is inserted and disposed in the pressing ring.
The pressing ring is provided on the stripper plate via a bush, and the bush is attached to the stripper plate when the axial position of the tip of the punch is adjusted by the stripper plate by punching the thin plate material. The thin plate material processing method according to claim 7, wherein the thin plate material is relatively moved.