JP2016120513A - Thin plate material and method for forming removal scheduled part thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin plate material capable of causing a thin plate base material to hold a removal scheduled part with moderate holding power without forming an opening around the removal scheduled part and a method for forming the removal scheduled part.SOLUTION: A thin plate material 1 consisting of a metal thin plate base material 2 and having a removal scheduled part 3 includes: a coupling part 4 for coupling the thin plate base material 2 around the removal scheduled part 3 with a part of a periphery of the removal scheduled part 3; and a half blanking part 5 constituted by performing half blanking processing to a part along a periphery 3a except a coupled part of the removal scheduled part 3 with the coupling part 4. A method for forming the removal scheduled part forms the coupling part 4 for coupling the thin plate base material 2 around the removal scheduled part 3 with a part of the periphery of the removal scheduled part 3 at a part of the part along the periphery and forms the half blanking part 5 constituted by performing the half blanking processing at the part along the periphery 3a except the coupled part of the removal scheduled part 3 with the coupling part 4 by performing the half blanking processing to the part except a part at the part along the periphery of the removal scheduled part 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a thin plate material made of a metal thin plate base material and a method for forming a planned removal portion thereof. More specifically, the present invention relates to a thin plate material having a planned removal portion to be removed from the thin plate base material and a method for forming the planned removal portion thereof. .

  As a thin plate material made of a metal thin plate base material, the thin plate material described in Patent Document 1 is known. The thin plate material described in Patent Document 1 includes a portion (scheduled removal portion) that is removed as a part from the thin plate base material, and a connecting portion (micro joint portion) that connects the planned removal portion and the surrounding thin plate base material. And are formed. The periphery of the portion to be removed is completely punched and opened except for the connecting portion. In this way, the thin plate material described in Patent Document 1 can be removed later as a component by fixing the planned removal portion to the surrounding thin plate base material via the connecting portion. It is configured.

JP 2004-283895 A

By the way, when manufacturing parts such as an exterior cover of a vending machine using a thin plate material made of a metal thin plate base material, even if the shape of the component made of the thin plate material is the same, a predetermined location There may be a mixture of specifications that require through holes and those that do not. Specifically, when attaching an optional bracket or device to a specified location on a thin plate material, a through hole is required to attach the bracket or the like to the thin plate material. Is no longer necessary. As a result, even if the shape of the component made of thin plate material is the same, the thin plate material with the specification of the through hole and the thin plate material with the specification of no through hole are mixed, which is the cause of the wrong combination of components (thin plate material) In addition, man-hours are required for management to prevent the mistakes in the combination.
Therefore, a device for manufacturing a thin plate material having a through hole at a predetermined location and a thin plate material having no through hole at the same predetermined location as a common component is required. In this case, for example, as in the thin plate material described in Patent Literature 1, a connection portion that connects the planned removal portion and the surrounding thin plate base material is formed, or the planned removal portion is generally known. Forming a structure that allows the through-holes to be selectively formed by removing the portions of the thin plate that are scheduled to penetrate (scheduled removal portions) by performing half-punching (half-shear processing) on itself. Can be considered.

However, for example, for a thin plate material that is an exterior cover of an outdoor device such as a vending machine that can be installed outdoors and does not require a through hole at a predetermined location, the connecting portion described in Patent Document 1 is included. When the structure is adopted, since the periphery of the portion to be removed is completely punched except for the connecting portion and opened, rainwater or the like may enter the inside through the opening.
On the other hand, when the general processing method of performing the half-cutting process on the part to be removed as described above is simply adopted, the stroke amount in the punching direction in a punch press machine such as a general turret punch press used for the half-cutting process or Due to variations in the thickness of the thin base metal, there is a risk that the dimension in the punching direction of the half blanking process may vary beyond the allowable range. Therefore, for example, in a thin plate material having a thickness of less than 1 mm generally used for an exterior cover or the like, if the removal planned portion itself is subjected to half-punching processing, the removal planned portion is insufficiently or excessively removed, and the removal planned portion has an appropriate holding force. Therefore, it is difficult to hold the thin plate base material. In other words, if the punching is insufficient, the half-punching process is incomplete, and the part to be removed cannot be removed with a moderate external force. If the part is overdrawn, the part to be removed will fall off naturally before the external force is applied. Therefore, there is a problem that it can no longer be used for a thin plate material that does not require a through hole.

  Therefore, in view of such a situation, the present invention provides a thin plate material capable of holding the planned removal portion on the thin plate base material with an appropriate holding force without forming an opening around the planned removal portion, and the removal thereof. An object is to provide a method for forming a planned portion.

  In response to the above problems, the thin plate material according to the present invention is a thin plate material that includes, as an aspect thereof, a metal thin plate base material that has a portion to be removed that is scheduled to be removed from the thin plate base material. Half-cutting a portion along the outer edge other than the connecting portion between the connecting portion connecting the thin plate base material around the portion to be removed and a part of the outer edge of the portion to be removed and the connecting portion of the portion to be removed And a half-punched portion formed by the following.

  Moreover, the removal scheduled part formation method which concerns on this invention has the removal scheduled part formation which forms the removal scheduled part to be removed from the said thin plate base material in the thin plate material which consists of metal thin plate base materials as the one aspect | mode. In the method, the thin plate base material around the portion to be removed is partially cut out at a portion along the outer edge of the portion to be removed by half-cutting a portion other than the portion. Forming a connecting part that connects the part of the outer edge of the part to be removed and a part of the outer edge of the part to be removed, and a half-punched part that is half-punched to a part along the outer edge other than the connecting part with the connecting part of the part to be removed It forms so that the said removal plan part may be formed in the said thin-plate material.

According to the above aspect of the thin plate material according to the present invention, the connection portion between the thin plate base material around the removal planned portion and a part of the outer edge of the removal planned portion is connected to the connection portion of the removal planned portion by the connection portion. Since the part along the outer edge is half-cut, for example, the protruding amount of the half-cut part is increased by a margin from the generally appropriate value (for example, about 60% of the plate thickness). If it is set to, in the situation where there is variation in the stroke amount of the punch press machine and the thickness of the thin plate base material, it is possible to eliminate the insufficient punching of the half punched portion (that is, the insufficient amount of protrusion of the half punched portion), and In the situation where there is the above variation, even if the half punched portion is excessively pulled (that is, the protruding amount of the half punched portion is excessive), the portion to be removed can be connected and held by the thin plate base material by the connecting portion. Since there are the connecting portion and the half-blanked portion around the planned removal portion, there is no opening around the planned removal portion.
In this way, there is no opening around the part to be removed, and even if, for example, the stroke amount of the punch press machine is excessively small or the thickness of the thin base metal is excessively large, the half-extracted part is removed. It is possible to prevent the occurrence of deficiency and to half-punch between the part to be removed and the thin plate base metal with an appropriate amount of protrusion, and due to the excessive stroke amount of the punch press machine and the thin plate base material being too thin, Even if excessive removal occurs, it is possible to prevent the portion to be removed from dropping out by the connecting portion.

  Moreover, according to the said one aspect | mode of the scheduled removal part formation method which concerns on this invention, the part which follows the outer edge of a removal plan part by carrying out the half-cutting process of parts other than the part in the part along the outer edge of a removal plan part Forming a connecting part that connects the thin plate base material around the part to be removed and a part of the outer edge of the part to be removed to a part along the outer edge other than the connecting part with the connecting part of the part to be removed. A half punched portion formed by half punching is formed. As a result, there is no opening around the area to be removed, and even if there is variation in the stroke amount of the punch press machine or the thickness of the thin plate base material, the protruding amount of the half punched portion is set higher than the margin. Thus, it is possible to prevent occurrence of insufficient extraction of the half-extracted portion, and even if the half-extracted portion is excessively extracted, it is possible to prevent the portion to be removed from falling off by the connecting portion.

  Thus, it is possible to provide a thin plate material and a method for forming the planned removal portion that can hold the removal planned portion on the thin plate base material with an appropriate holding force without forming an opening around the planned removal portion. Can do.

It is a fragmentary perspective view which shows schematic structure of the thin-plate material which concerns on 1st Embodiment of this invention. FIG. 2 is a side view of a thin plate material viewed from the direction A shown in FIG. 1. FIG. 2 is a side view of a thin plate material viewed from a B direction shown in FIG. 1. It is the principal part expansion perspective view which expanded and showed the principal part of the thin-plate material shown in FIG. It is C1-C1 arrow sectional drawing of the thin-plate material shown in FIG. It is D1-D1 arrow sectional drawing of the thin-plate material shown in FIG. It is principal part sectional drawing which shows the modification of the thin-plate material which concerns on the said 1st Embodiment. It is a principal part expansion perspective view which shows another modification of the thin-plate material which concerns on the said 1st Embodiment. It is C2-C2 arrow sectional drawing of the thin-plate material shown in FIG. It is D2-D2 arrow sectional drawing of the thin-plate material shown in FIG. It is a principal part expansion perspective view of the thin-plate material which concerns on 2nd Embodiment of this invention. It is C3-C3 arrow sectional drawing of the thin-plate material shown in FIG. It is D3-D3 arrow sectional drawing of the thin-plate material shown in FIG. It is a principal part expansion perspective view which shows the modification of the thin-plate material which concerns on the said 2nd Embodiment. It is a principal part expansion perspective view which shows another modification of the thin-plate material which concerns on the said 2nd Embodiment. It is C4-C4 arrow sectional drawing of the thin-plate material shown in FIG. It is D4-D4 arrow sectional drawing of the thin-plate material shown in FIG. It is a principal part expansion perspective view of the thin-plate material which concerns on 3rd Embodiment of this invention. It is C5-C5 arrow sectional drawing of the thin-plate material shown in FIG. It is D5-D5 arrow sectional drawing of the thin-plate material shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a partial perspective view showing a schematic configuration of a thin plate material 1 according to a first embodiment of the present invention, FIG. 2 is a side view of the thin plate material 1 viewed from the direction A shown in FIG. 1, and FIG. It is a side view of the thin plate material 1 seen from the B direction shown in FIG. In this embodiment, a case where the thin plate material according to the present invention is used for an exterior cover constituting an outer door of a vending machine will be described as an example.
For example, a through hole for attaching an anti-theft metal fitting may be provided as an optional specification on the exterior cover constituting the outer door of the vending machine. The exterior cover is manufactured by sheet metal processing or painting of the thin plate material 1. Below, the thin board | plate material 1 used for such an exterior cover and the removal scheduled part formation method which forms the removal plan part 3 mentioned later in this thin board | plate material 1 are demonstrated. 1 to 3 are partial views including a main part of the thin plate 1 used for the exterior cover, and are actually formed to have an appropriate size.

First, the structure of the thin plate material 1 will be described.
The thin plate material 1 is made of a metal thin plate base material 2 capable of sheet metal processing and the like, and includes a to-be-removed portion 3, a connecting portion 4, and a half-cut portion 5 as shown in FIGS. It is configured.
In general, an exterior cover or the like is formed by subjecting a thin plate base material 2 that has been cut to an appropriate size to a hole or the like using a turret punch press or the like, and bending the thin plate base material 2 that has been drilled or the like. Etc. are manufactured through a process of forming an appropriate shape and a coating process. In the present embodiment, the thin plate material 1 is, for example, the one that has been subjected to the above-described hole machining and the like before being bent, that is, the intermediate part before the exterior cover is completed.

  In consideration of the workability of sheet metal processing, the thin sheet base material 2 is made of, for example, an SECC material having an appropriate sheet thickness t of less than 1 mm (specifically, t = 0.5 mm to 0.7 mm). It is done.

  The to-be-removed portion 3 is a portion that is to be removed from the thin plate base material 2, and in the present embodiment, is a portion in which a through hole for attaching the anti-theft metal fitting may be formed. For example, as shown in FIG. 1, the scheduled removal portion 3 is formed to have an oval outer shape. This to-be-removed portion 3 is formed regardless of whether or not a through-hole for attaching the anti-theft metal fitting is necessary, and when a through-hole is required, it is removed afterwards as described later and does not require a through-hole. In the case, it is left as it is.

  The connecting portion 4 connects the thin plate base material 2 around the to-be-removed portion 3 and a part of the outer edge of the to-be-removed portion 3, and is formed with a predetermined width, for example. The connecting portion 4 is, for example, an unprocessed portion that is not subjected to half-cutting, which will be described later, among the portions along the outer edge of the planned removal portion 3. The surface of the connecting portion 4 is flush with the surfaces of the removal scheduled portion 3 and the thin plate base material 2.

FIG. 4 is an enlarged perspective view showing a main part of the thin plate 1 shown in FIG. 5 is a cross-sectional view taken along arrow C1-C1 shown in FIG. 4, and FIG. 6 is a cross-sectional view taken along arrow D1-D1 shown in FIG.
In the present embodiment, as shown in FIGS. 1 and 4, the connecting portion 4 includes a first connecting portion 4 a connected to a predetermined location on the outer edge of the scheduled removal portion 3, and a first connection on the outer edge of the scheduled removal portion 3. It consists of the 2nd connection part 4b connected to the location facing the part 4a.
Specifically, each of the connecting portions 4a and 4b has its center line aligned with the central axis in the longitudinal direction of the oval-shaped removal scheduled portion 3 (the one-dot chain line marked with D1-D1 in FIG. 4). Has been placed. Thereby, each connection part 4a, 4b is comprised so that it may become a rotating shaft at the time of removing the removal scheduled part 3 so that it may mention later.

  As shown in FIGS. 1 to 6, the half punched portion 5 is formed by performing a half punching process on a portion along the outer edge 3 a other than the connecting portion with the connecting portion 4 in the outer edge of the portion to be removed 3. is there. In other words, the half-cut portion 5 has a portion along the outer edge 3 a half-cut in the plate thickness direction, a part of which protrudes from the surface of the thin plate base material 2, and the rest is located in the thin plate base material 2. ing.

In the present embodiment, the half punched portion 5 includes a first half punched portion 5a and a second half punched portion 5b facing each other with the connecting portions 4 (4a, 4b) interposed therebetween.
Specifically, each half punched portion 5a, 5b is formed in a substantially arc shape having a predetermined width so as to follow the outer shape of the oval-shaped removal planned portion 3 in plan view. Moreover, in this embodiment, as shown in FIG.5 and FIG.6, the part which protrudes from the surface of the thin plate preform | base_material 2 of each half extraction part 5a, 5b has cross-sectional square shape. Each half punched portion 5a, 5b is extruded in the plate thickness direction by a turret punch press or the like, and appropriately protrudes from the surface of the thin plate base material 2 (see FIGS. 2, 3, 5, and 6). Just protruding.
In FIG. 5, the boundary between the thin plate base material 2 and the half punched portions 5a and 5b and the boundary between the half punched portions 5a and 5b and the portion 3 to be removed are not fractured surfaces, but their metals. Although shown as what the structure | tissues are connected, not only this but a part or all of each said boundary turns into a torn surface, and the thin-plate base material 2 and each half-punch part 5a, 5b, or each half-punch The part 5a, 5b and the part to be removed 3 may be in close contact with each other.

  More specifically, in this embodiment, the drawing direction of the first half punched portion 5a and the pulling direction of the second half punched portion 5b are opposite to each other. That is, in FIGS. 1 to 6, the drawing direction of the first half punched portion 5 a is upward in the plate thickness direction, and the drawing direction of the second half punched portion 5 b is downward in the plate thickness direction.

  Next, a method for forming a planned removal portion for forming the planned removal portion 3 in the present embodiment will be described. Moreover, the following description is also description of one Embodiment of the removal scheduled part formation method which concerns on this invention. In the following, a case where half-cutting is performed using a turret punch press will be described as an example. However, half-cutting is not limited to the turret punch press, and other general punch press machines can be used.

  In the method of forming the planned removal portion according to the present embodiment, by removing a part other than a part of the portion along the outer edge of the planned removal portion 3, the portion of the planned removal portion 3 is partially removed along the outer edge. While forming the connection part 4 (4a, 4b) which connects the surrounding thin-plate base material 2 and a part of outer edge of the scheduled removal part 3, the connection location with the connection part 4 (4a, 4b) of the scheduled removal part 3 A half-punched part 5 (5a, 5b) formed by half-punching is formed in a part along the outer edge 3a other than the above, and a part to be removed 3 is formed on the thin plate 1.

  Specifically, first, an SECC material having an appropriate thickness is prepared as the thin plate base material 2, and the thin plate base material 2 is set on a table or the like of a turret punch press. At the same time, the punch and die manufactured in accordance with the shape of the half punched portion 5 (5a, 5b) are set on the turret of the turret punch press. For example, although not shown, the punch set on the upper turret is formed in accordance with the concave portion (groove portion) formed according to the outer shape of the first half punched portion 5a and the outer shape of the second half punched portion 5b. The die that has a convex portion and is set in the lower turret is formed in accordance with the convex portion formed in accordance with the outer shape of the first half-cut portion 5a and the outer shape of the second half-cut portion 5b. Formed with a concave portion.

After completion of the half-punching preparation, first, the thin plate base material 2 set on a table or the like is moved to a predetermined position and positioned, and is arranged between the upper turret and the lower turret. In this state, the upper turret is lowered toward the lower turret. At this time, the height position of the lower end of the upper turret is such that the first half punched portion 5a protrudes upward from the upper surface of the thin plate base material 2 by an appropriate protruding height h and the second half punched portion 5b. Are set so as to protrude downward from the lower surface of the thin plate base material 2 by an appropriate protrusion height h. Thereby, the half punching of the 1st half punching part 5a and the half punching of the 2nd half punching part 5b are performed from a mutually reverse direction.
The target value (design value) of the protrusion height h is, for example, a value that is higher by a margin than a value (about 60% of the thickness t of the thin plate base material 2) that is appropriate in general half-cutting ( It is set to 65% to 80% of the plate thickness t). The actual protruding height h of the finished half-cut portions 5a and 5b depends on variations in the target value of the descending stroke amount of a punch press machine such as a turret punch press and variations in the thickness of the SECC material used as the thin plate base material 2. ,fluctuate.
More specifically, for example, when the outer peripheral length (outer edge length) of the portion to be removed 3 is 35.4 mm and the width of the connecting portion 4 (4a, 4b) is 1 mm, the protrusion height h (in other words, punch The target value of the push-in amount is set to about 70% ± 5% of the thickness t of the thin base metal 2.
In this way, the half-cutting process is performed at each of the portions along the outer edge of the portion to be removed 3 that face each other with the portion to be removed 3 interposed therebetween. As a result, the first half punched portion 5a is formed at one of the two locations, the second half punched portion 5b is formed at the other, one end of the first half punched portion 5a and one end of the second half punched portion 5b, The first connecting portion 4a is formed between the other end of the first half punched portion 5a and the other end of the second half punched portion 5b, and the removal shown in FIG. Formation of the planned portion 3 is completed.
Thereafter, the thin plate material 1 is conveyed to, for example, a press brake machine, a painting booth, etc., subjected to bending or the like, formed into an appropriate shape and painted. Thereby, the exterior cover of the outer door of the vending machine using the thin plate material 1 is completed.

  Next, the removal method of the removal scheduled part 3 is demonstrated. In addition, although each half-punch part 5a, 5b, the thin-plate base material 2, and each half-punch part 5a, 5b and the removal plan part 3 are demonstrated below as those metal structures are connected, Even if the boundary between the base material 2 and each half-blanked portion 5a, 5b and the boundary between each half-blanked portion 5a, 5b and the portion 3 to be removed are in close contact with each other as a fracture surface The removal planned portion 3 can be removed by the removal method described below.

The outer door assembled using the completed exterior cover is assembled to the vending machine main body to complete the vending machine. Here, when the vending machine has a specification that requires a through-hole for attaching the anti-theft metal fitting, for example, the removal scheduled portion 3 is removed at an appropriate timing during the assembly process.
Specifically, as indicated by an arrow S1 in FIGS. 4 and 5, an appropriate tool (for example, a flat-blade screwdriver and a hammer) is placed at a predetermined position on the first half punched portion 5a side of the portion to be removed 3 from above to below. Or the like, or as indicated by an arrow S2, a predetermined position of the second half punched portion 5b (for example, the thin plate base material 2 side of the second half punched portion 5b as shown in FIG. 5) The external force may be applied to the predetermined position using an appropriate tool from above to below.
When an external force is applied to the removal planned portion 3 at the position and orientation indicated by the arrow S1, for example, a central axis line connecting the central lines of the first connection portion 4a and the second connection portion 4b to the removal planned portion 3 (in FIG. 4). A rotating force is applied in a direction indicated by an arrow R1 in FIG. 4 around a one-dot chain line with D1-D1. Then, when the planned removal portion 3 starts to rotate in the R1 direction with the connecting portions 4a and 4b as the rotation axes, for example, breakage occurs at the boundary between the outer edge of the planned removal portion 3 and the half punched portions 5a and 5b. Thereafter, when the removal planned portion 3 further rotates and the torsional force increases, for example, a fracture occurs at the boundary between the outer edge of the planned removal portion 3 and each of the connecting portions 4a and 4b. As a result, the planned removal portion 3 is removed, and a through hole is formed. In order to apply a rotational force in the R2 direction to the removal planned portion 3, for example, an external force may be applied downward from above to a predetermined position on the second half punched portion 5b side of the removal planned portion 3. In this case, after the fracture occurs at the boundary between the outer edge of the part to be removed 3 and each half-blanked part 5a, 5b, the part to be removed 3 rotates while sliding the outer edge on the inner edge of each half-bumped part 5a, 5b. Accordingly, an external force larger than the external force applied at the position and orientation indicated by the arrow S1 is required. Accordingly, the direction in which the external force is applied is preferably the direction of the arrow S1 in which the outer edge of the portion to be removed 3 becomes free immediately after breaking.
On the other hand, when an external force is applied to the second half punched portion 5b at the position and orientation indicated by the arrow S2, for example, the removal planned portion 3 and each half punched portion 5a, 5b are integrated into each connecting portion 4a, Rotation occurs in the R2 direction with 4b as a rotation axis, and breakage occurs at the boundary between the half-blanked portions 5a and 5b and the thin plate base material 2. Thereafter, the outer edge of the integrated body (that is, the outer edge of each half-blanked portion 5a, 5b) immediately becomes free and further rotates, and breakage occurs at the boundary between the thin plate base material 2 and each connecting portion 4a, 4b. As a result, the to-be-removed portion 3, the connecting portions 4a and 4b, and the half punched portions 5a and 5b are removed, and a through hole is formed. In addition, when an external force is applied to the second half punched portion 5b in this way, it may be assumed that only the second half punched portion 5b is removed. In this case, an external force is applied to the planned removal portion 3 from the direction of the arrow S1. What is necessary is just to remove at least the scheduled removal part 3 by adding.
In addition, in the case of a specification that does not require a through hole for attaching the anti-theft metal fitting, no external force is applied, and the removal planned portion 3 is fixed as it is.

According to the thin plate material 1 according to this embodiment, the connecting portion 4 connects the thin plate base material 2 around the planned removal portion 3 and a part of the outer edge of the planned removal portion 3 while connecting the connecting portion of the planned removal portion 3. Since the part along the outer edge 3a other than the connection part with 4 is subjected to the half-punching process, for example, the protruding amount (projecting height h) of the half-punched part 5 is generally determined to be appropriate. If the height is set higher than the margin, the insufficient punching of the half-punched portion 5 can be solved under the situation where the stroke amount of the punch press machine and the thickness t of the thin plate base material 2 vary, and the above variation Under certain circumstances, even if the half punched portion 5 is excessively pulled out, the portion to be removed 3 can be connected to the thin plate base material 2 and held by the connecting portion 4. And since the connection part 4 and the half extraction part 5 exist in the circumference | surroundings of the removal plan part 3, there is no opening around the plan part 3 to be removed.
In this way, there is no opening around the portion to be removed 3, and even if, for example, the stroke amount of the punch press machine is excessively small or the thickness t of the thin base metal 2 is excessively large, It is possible to prevent the occurrence of insufficient punching of the portion 5 and to half-punch between the portion to be removed 3 and the thin plate base material 2 with an appropriate amount of protrusion, and an excessive stroke amount of the punch press machine or the plate of the thin plate base material 2 Even if the half-cut portion 5 is excessively pulled out due to the excessive thickness, the connecting portion 4 can prevent the portion 3 to be removed from coming off. In other words, even if the mechanical accuracy of the punch press machine and the thickness accuracy of the thin plate base material 2 are somewhat worse, it is possible to set the removal amount of the portion 3 to be removed by setting the protruding amount of the half punched portion 5 higher than usual. It is possible to construct a structure that can secure a sufficient holding force.

  In addition, according to the method of forming the planned removal portion according to the present embodiment, the portion along the outer edge of the planned removal portion 3 can be obtained by half-cutting a portion other than a part of the portion along the outer edge of the planned removal portion 3. While forming the connection part 4 which connects the thin base material 2 around the part to be removed 3 and a part of the outer edge of the part to be removed 3 in a part, other than the connection part with the connection part 4 of the part to be removed 3 A half punched portion 5 formed by half punching is formed in a portion along the outer edge 3a. As a result, there is no opening around the portion 3 to be removed, and even if the stroke amount of the punch press machine or the thickness of the thin plate base material 2 varies, the protruding amount of the half punched portion 5 is increased by a margin. It is possible to prevent the occurrence of insufficient extraction of the half-blanked portion 5 only by setting to the above, and even if the half-cut portion 5 is excessively removed, the connection portion 4 prevents the planned removal portion 3 from falling off. Can do.

  In this way, the thin plate material 1 and the method of forming the planned removal portion that can hold the removal planned portion 3 on the thin plate base material 2 with an appropriate holding force without forming an opening around the planned removal portion 3. Can be provided.

  Moreover, in this embodiment, the connection part 4 is in the location which opposes the 1st connection part 4a connected to the predetermined location of the outer edge of the scheduled removal part 3, and the 1st connection part 4a of the outer edge of the scheduled removal part 3. It consists of the 2nd connection part 4b connected, and the half extraction part 5 was set as the structure which consists of the 1st half extraction part 5a and the 2nd half extraction part 5b which mutually oppose on both sides of the connection part 4. Thereby, when removing the removal planned part 3, since the connection part 4 can be easily rotated as a rotating shaft, the removal planned part 3 can be easily removed.

  Moreover, in this embodiment, it was set as the structure where the extraction direction of the 1st half punching part 5a and the extraction direction of the 2nd half punching part 5b are mutually opposite. Therefore, for example, an external force is applied to the planned removal portion 3 to cause breakage at the boundary between the planned removal portion 3 and the half-blanked portions 5a and 5b, or an external force is applied to the half-blanked portion (5a or 5b). When breaking occurs at the boundary between the punched portions 5a, 5b and the thin plate base material 2, the direction in which the outer edge of the portion 3 to be removed and the outer edges of the half punched portions 5a, 5b are immediately free after these breaks. When the external force is applied in an appropriate direction and position (such as the arrows S1 or S2 shown in FIGS. 4 and 5) so as to move, the removal planned portion 3 and the like can be removed with less external force.

Here, for example, when a plurality of thin plate members 1 are temporarily stored as intermediate parts before bending, the plurality of thin plate members 1 are temporarily stacked. In this case, since the half-cut portion 5 (5a, 5b) protrudes from the surface of the thin plate base material 2, the surface of the adjacent thin plate material 1 is scratched by the protruding portion, or the lower thin plate material 1 May be deformed. In addition, since there are protruding portions, it is difficult to stably stack a plurality of thin plate members 1 and it may be difficult to safely transport the plurality of thin plate members 1 in a stacked state by a forklift or the like. is there.
Below, the modification of the thin plate | board material 1 supposing such a case is demonstrated.

  FIG. 7 is a cross-sectional view of an essential part showing a modification of the thin plate material 1 according to the first embodiment, and the same cross-sectional position as that of the cross section taken along the line C1-C1 shown in FIG. FIG. 6 is a cross-sectional view (that is, equivalent to the cross-sectional view of FIG. 5).

In this modification, the half punched portion 5 (5a, 5b) is pushed back so as to be flush with the thin plate base material 2 around the portion 3 to be removed. The projecting portions (see FIG. 5) of the half punched portions 5a and 5b are pushed back into the thin plate base material 2, and the concave portions having a square cross section formed on the opposite side of the projecting portions of the half punched portions 5a and 5b. Is gone.
In this modified example, the method of forming the planned removal portion further includes a push-back step of pushing back the half-blanked portion 5 (5a, 5b) so as to be flush with the thin plate base material 2 around the planned removal portion 3. Has been.
Specifically, a die and punch having a flat surface are set in advance for pressing back to the turret of the turret punch press separately from the die and punch for half punching. By rotating the die and the punch for push-back processing, the push-back punch is performed by positioning the die and the punch for upper and lower sides of the thin plate base material 2.
The interface between the half punched portion 5 and the thin plate base material 2 after the push-back punch and the interface between the half punched portion 5 and the portion to be removed 3 after the push-back punch are partly or entirely broken and are in close contact with each other. In this state, the metal structures are connected to each other. In any case, the removal planned portion 3 is moderately held by at least the connecting portion 4 (4a, 4b).

  Thus, since the thin plate material 1 is flattened by pushing back the half punched portion 5 to be flattened, for example, a plurality of thin plate materials 1 are stably stacked as intermediate parts before bending. In addition, a plurality of thin plate members 1 can be safely conveyed by a forklift or the like, and the adjacent thin plate members 1 are not damaged or deformed. Further, since the half punched portion 5 (5a, 5b) is pushed back into the thin plate base material 2, the side end face of the half punched portion 5 (5a, 5b) is not exposed to the outside. For this reason, even if the thin plate member 1 is stored as an intermediate part for a long period of time, it is possible to prevent the side end surfaces of the half-punched portions 5 (5a, 5b) from being corroded.

8 is an essential part enlarged perspective view showing another modified example of the thin plate 1 according to the first embodiment, FIG. 9 is a cross-sectional view taken along arrow C2-C2 shown in FIG. 8, and FIG. 10 is shown in FIG. It is D2-D2 arrow sectional drawing shown.
In the said 1st Embodiment, although the extraction direction of the 1st half punching part 5a and the extraction direction of the 2nd half punching part 5b were mutually opposite, it is not restricted to this, As shown in FIGS. 8-10 Furthermore, they may be the same. In this case, for example, the punch of the upper turret is formed to have a convex portion formed in accordance with the outer shape of each half punched portion 5a, 5b, and the die of the lower turret is formed to the outer shape of each half punched portion 5a, 5b. It is formed with a recess formed in accordance with
In this other modification, when removing the planned removal portion 3, for example, an external force may be applied to the planned removal portion 3 in an appropriate direction and position, or an appropriate direction and position may be applied to the half punched portion 5 (5a, 5b). You may apply external force. The position of the external force applied to the planned removal portion 3 may be a predetermined position on the outer edge 3a side of the planned removal portion 3 or the central portion of the planned removal portion 3.
In this modification, the half punched portion 5 (5a, 5b) is pushed back so as to be flush with the thin plate base material 2 around the portion to be removed 3 as shown in FIG. May be. Further, in the first embodiment and the modifications thereof, the direction of the external force applied when removing at least the planned removal portion 3 and the addition position thereof are not particularly limited as long as the planned removal portion 3 can be removed.

  11 is an enlarged perspective view of a main part of the thin plate 1 according to the second embodiment of the present invention, FIG. 12 is a cross-sectional view taken along the line C3-C3 shown in FIG. 11, and FIG. 13 is an arrow D3-D3 shown in the figure. FIG. In addition, the same code | symbol is attached | subjected to the element similar to the thin plate material 1 of 1st Embodiment, description is abbreviate | omitted, and only a different part is demonstrated below.

In the said 1st Embodiment and its modification, as shown in FIG.5 and FIG.9, while the part protruded from the surface of the thin-plate base material 2 of each half-punch part 5a, 5b has a cross-sectional square shape, Although the case where it has a recessed part with a square-shaped cross section on the opposite side to the protrusion part of each half punching part 5a, 5b was demonstrated, as shown in FIGS. 11-13, not only this but each half punching part 5a, 5b The portion protruding from the surface of the thin plate base material 2 has a triangular cross section, and may also be configured to have a concave portion (V-shaped groove) having a triangular cross section on the opposite side to the protruding portions of the half punched portions 5a and 5b. Good.
In this case, the cross-sectional shapes of the concave and convex portions of the punch and die set in the upper turret and lower turret of the turret punch press may be formed in a right triangle (V shape).

Further, in the case of the thin plate material 1 according to the second embodiment, as indicated by an arrow S1 ′ in FIGS. 11 and 12, the predetermined position on the second half punched portion 5b side of the portion to be removed 3 is directed from above to below. An external force may be applied, or as indicated by an arrow S2, an external force may be applied from a top to a bottom at a predetermined position of the second half punched portion 5b.
When an external force is applied to the portion to be removed 3 at the position and orientation indicated by the arrow S1 ′, and when an external force is applied to the second half-blanked portion 5b at the position and orientation indicated by the arrow S2, the removal is planned in any case. The portion 3 and the half punched portions 5a and 5b are integrated into one body and rotated in the R2 direction with the connecting portions 4a and 4b as rotation axes. At the boundary between the half punched portions 5a and 5b and the thin plate base material 2 Rupture occurs. Thereafter, the outer edge (the outer edge of each half-blanked portion 5a, 5b) of the one body becomes free immediately and further rotates, and breakage occurs at the boundary between the thin plate base material 2 and each connecting portion 4a, 4b. As a result, the to-be-removed portion 3, the connecting portions 4a and 4b, and the half punched portions 5a and 5b are removed, and a through hole is formed.
In order to generate a rotational force in the R1 direction, for example, an external force may be applied from the upper side to the lower side at a predetermined position on the first half punched portion 5a side of the scheduled removal portion 3, but in this case, each half After the breakage occurs at the boundary between the punched portions 5a and 5b and the thin plate base material 2, the integrated body rotates while sliding the outer edge thereof on the inner edge of the thin plate base material 2, and the arrow S1 'and the arrow An external force larger than the external force applied at the position and orientation indicated by S2 is required. Therefore, the direction in which the external force is applied is preferably the direction of the arrows S1 ′ and S2 in which the outer edge of the integrated object becomes free immediately after breaking.

FIG. 14 is an essential part enlarged perspective view showing a modification of the thin plate 1 according to the second embodiment.
In this modification, the groove part 6 is formed in the connection part 4 (4a, 4b).
The groove portion 6 is formed along the inner edge of the thin plate base material 2 on the thin plate base material 2 side on the surface of the connecting portion 4 (4a, 4b), for example. The groove 6 may be formed at an appropriate timing. For example, the groove 6 is formed simultaneously with the half blanking process.
Thereby, this groove part 6 becomes a weak point part, and it becomes easy to fracture | rupture the connection part 4 (4a, 4b), As a result, generation | occurrence | production of the burr | flash in a fracture surface can be suppressed. Further, the groove 6 can be reliably broken at the end on the thin plate base material 2 side.

15 is an essential part enlarged perspective view showing another modified example of the thin plate 1 according to the second embodiment, FIG. 16 is a cross-sectional view taken along arrow C4-C4 shown in FIG. 15, and FIG. It is D4-D4 arrow sectional drawing shown.
In this other modification example, as in the other modification examples (FIGS. 8 to 10) of the first embodiment described above, the extraction direction of the first half-blanking part 5a and the extraction direction of the second half-blanking part 5b are as follows. Are the same. In this case, for example, the punch of the upper turret is formed with a convex portion having a triangular cross section formed in accordance with the outer shape of each of the half punched portions 5a and 5b, and the die of the lower turret is formed by each half punched portion 5a. , 5b and having a concave section with a triangular cross section formed in accordance with the outer shape of 5b.
In this modification, when removing the integral part of the planned removal portion 3 and each half-blanked portion 5a, 5b, for example, an external force may be applied to the planned removal portion 3 in an appropriate direction and position. An external force may be applied to the portion 5 (5a, 5b) in an appropriate direction and position. The position of the external force applied to the planned removal portion 3 may be a predetermined position on the outer edge 3a side of the planned removal portion 3 or the central portion of the planned removal portion 3.
In addition, in this another modification, you may form the groove part 6 in the connection part 4 (4a, 4b). In the second embodiment and its modifications, the direction of the external force applied when removing the integral object including the removal planned portion 3 and the position of the external force are not particularly limited as long as the integral object can be removed.

  18 is an enlarged perspective view of the main part of the thin plate 1 according to the third embodiment of the present invention, FIG. 19 is a cross-sectional view taken along the arrow C5-C5 shown in FIG. 18, and FIG. 20 is D5-D5 shown in FIG. It is arrow sectional drawing. In addition, the same code | symbol is attached | subjected to the element similar to the thin plate material 1 of 1st Embodiment, description is abbreviate | omitted, and only a different part is demonstrated below.

In the said 1st Embodiment, 2nd Embodiment, and those modifications, although it demonstrated that the removal plan part 3 itself was not subjected to half-punching processing, it is not restricted to this, and the removal plan part 3 itself is provided. May also be half-punched. In FIG. 18, the planned removal portion 3 is a region inside the phantom line indicated by a two-dot chain line, and this phantom line is an outer edge other than the connection portion of the planned removal portion 3 with the connection portion 4 (4a, 4b). It corresponds to 3a.
Specifically, as shown in FIG. 19, the removal planned portion 3 is half-cut simultaneously with the half-cut portions 5 a and 5 b and is formed flush with the half-cut portions 5 a and 5 b. In this case, for example, the punch of the upper turret is formed with a convex portion formed in accordance with the outer shape of the integrated part of each half-punched portion 5a, 5b and the portion to be removed 3, and the die of the lower turret is It is formed with a recess formed in accordance with the outer shape of the integrated object.
At the time of half-punching, the part to be removed 3 is half-punched and displaced, so that one end of the connecting part 4 (4a, 4b) connected to the outer edge of the part to be removed 3 is also integrated with the part to be removed 3. To displace. As a result, as shown in FIGS. 18 and 20, the connecting portion 4 is inclined so as to be away from the surface of the thin plate base material 2 toward the removal scheduled portion 3 side.
In the present embodiment, the direction of the external force applied when removing the integrated object including the to-be-removed portion 3 and the additional position thereof are not particularly limited as long as the integrated object can be removed.

Moreover, you may form the groove part 6 in the connection part 4 (4a, 4b) in 1st Embodiment, 3rd Embodiment, and those modifications. And in 2nd Embodiment and its modification, you may comprise by pushing back so that the half-punch part 5 (5a, 5b) may become the thin-plate base material 2 around the removal plan part 3. FIG. Further, in the third embodiment, the half punched portions 5 (5a, 5b) and the portion to be removed 3 may be configured to be pushed back so as to be flush with the thin plate base material 2.
Moreover, in each embodiment and those modifications, the scheduled removal part 3 shall have an oval-shaped external shape, and the half-cut part 5 (5a, 5b) shall have a substantially circular arc-shaped external shape. However, the external shapes of the part to be removed 3 and the half punched part 5 (5a, 5b) are not limited to this, and can be determined as appropriate. Moreover, the cross-sectional shape of the half punching part 5 can also be determined suitably. And the connection location by the connection part 4 can be set to a position suitably, and the connection part 4 can be suitably formed not only in 2 places but in 1 place or 3 places or more. In this case, the position and the number of the half punched portions 5 can also be appropriately determined according to the position and the number of the connecting portions 4.
And in each embodiment and those modification, when pushing the removal plan part 3 etc. back and making it the same with the thin-sheet base material 2, if the thin-plate material 1 is painted after that, the position of the removal plan part 3 will not be known. There is a fear. Accordingly, in this case, the outline can be visually recognized after painting by scribing the contour line from above the painted surface so that the outline of the portion 3 to be removed can be understood, or by chamfering the edge portion of the outline before painting. It is good to make it so that a mark is previously shown in the position where external force is applied.

  In the above description, the thin plate 1 has been described as an example in which it is used for an exterior cover of a vending machine. However, the present invention is not limited to this, and can be used for various devices.

  The preferred embodiments of the present invention and modifications thereof have been described above. However, the present invention is not limited to the above-described embodiments and modifications, and various modifications and changes can be made based on the technical idea of the present invention. Is possible.

DESCRIPTION OF SYMBOLS 1 ... Thin plate material 2 ... Thin plate base material 3 ... To-be-removed part 3a ... Outer edge 4 other than a connection part with the connection part of a to-be-removed part ... Connection part 4a ... 1st connection part 4b ... 2nd connection part 5 ... Half extraction part 5a ... 1st half extraction part 5b ... 2nd half extraction part 6 ... Groove

Claims (7)

It is a thin plate material made of a metal thin plate base material and having a portion to be removed that is scheduled to be removed from the thin plate base material,
A connecting portion that connects the thin plate base material around the portion to be removed and a part of the outer edge of the portion to be removed;
A half-punched portion formed by a half-punching process on a portion along the outer edge other than the connection portion with the connection portion of the planned removal portion;
Including sheet metal. The connecting portion includes: a first connecting portion connected to a predetermined location on the outer edge of the scheduled removal portion; and a second connecting portion connected to a location facing the first connecting portion on the outer edge of the scheduled removal portion. Become
The thin plate member according to claim 1, wherein the half punched portion includes a first half punched portion and a second half punched portion that are opposed to each other with the connecting portion interposed therebetween.   The thin plate material according to claim 2, wherein a drawing direction of the first half punched portion and a punching direction of the second half punched portion are opposite to each other.   The thin plate member according to any one of claims 1 to 3, wherein the half punched portion is pushed back so as to be flush with the thin plate base material around the portion to be removed.   The thin plate material according to any one of claims 1 to 4, wherein a groove is formed in the connecting portion. A method of forming a planned removal portion for forming a planned removal portion to be removed from the thin plate base material on a thin plate material made of a metal thin plate base material,
The thin plate base material around the portion to be removed and the portion to be removed are partially cut off at a portion along the outer edge of the portion to be removed by half punching. Forming a connecting part that connects a part of the outer edge of the part, and forming a half-punched part that is half-punched to a part along the outer edge other than the connecting part of the part to be removed with the connecting part,
A planned removal portion forming method for forming the planned removal portion on the thin plate material.   The removal scheduled part forming method according to claim 6, further comprising a pushing back step of pushing back the half punched part so as to be flush with the thin plate base material around the removal scheduled part.