processing device

Abstract

Provided is a processing device for processing a flat member, capable of suppressing adhesion of a shaft and improving durability. The processing device includes a holder having a rotation axis that rotates in a bending direction of the flat member, and a clamp that sandwiches the flat member with the holder to restrain the flat member and has a rotation axis that rotates in the bending direction. The clamp includes a flange that sandwiches the flat member between the flange and the holder to restrain the flat member, a shaft that is connected to the flange and passes through a through-hole provided in the holder, and a coating layer that is formed on a surface of the shaft. The hardness of the coating layer and the shaft is higher than the hardness of the holder.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a processing device such as a flat piece. BACKGROUND

[0002] Japanese Patent Application Publication No. 2008-228435 discloses a processing device for bending a flat piece.

[0003] It is known that in a processing device that bends a flat piece by clamping the flat piece with a clamping shaft and a holder, a coating is formed on the shaft. Sometimes, due to the hardness of the holder being higher than the hardness of the shaft and the coating, adhesion of the shaft is caused by sliding of the holder, and the processing device deteriorates. For this reason, there has been a demand for a processing device that is excellent in durability. SUMMARY

[0004] The present disclosure is made in order to solve the above-described problem, and an object is to provide a processing device that can suppress adhesion of a shaft.

[0005] A processing device according to an aspect of the present disclosure has a holder having a rotation axis that rotates in a bending direction of a flat piece, and a clamp that sandwiches the flat piece with the holder to restrain the flat piece and has the rotation axis that rotates in the bending direction, the clamp having a flange that sandwiches the flat piece between the flange and the holder to restrain the flat piece, a shaft that is connected to the flange and passes through a through-hole provided in the holder, and a coating that is formed on a surface of the shaft, the hardness of the coating and the shaft being higher than the hardness of the holder.

[0006] In the above-described processing device, it can be that the hardness of the coating is higher than the hardness of the shaft.

[0007] In the above-described processing device, it can be that the shaft has an insertion portion that slides in the through-hole and a support portion that protrudes from the through-hole, and the coating is formed on the insertion portion.

[0008] According to the present disclosure, it is possible to provide a processing device that can suppress adhesion of a shaft.

[0009] The above and other objects, features and advantages of the present disclosure will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which: BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a perspective view illustrating a processing device according to an embodiment.

[0011] Figure 2Ais a perspective view of a holder and a jig of a processing apparatus according to an example embodiment, showing the holder.

[0012] Figure 2B is a perspective view of a holder and a jig of a processing apparatus according to an example embodiment, showing the jig.

[0013] Figure 3 is a sectional view of a shaft and a coating in a through-hole of a holder in a processing apparatus according to an example embodiment.

[0014] Figure 4A is a diagram of an operation of a processing apparatus 1 according to an example embodiment, showing arrangement of a flat piece.

[0015] Figure 4B is a diagram of an operation of a processing apparatus 1 according to an example embodiment, showing clamping and bending of a flat piece.

[0016] Figure 4C is a diagram of an operation of a processing apparatus 1 according to an example embodiment, showing release of a flat piece.

[0017] Figure 5 is a plan view of a coil according to an example embodiment.

[0018] Figure 6A is a sectional view of a shaft and a coating in a through-hole of a holder in a processing apparatus according to a comparative example, showing a case of coating abrasion.

[0019] Figure 6B is a sectional view of a shaft and a coating in a through-hole of a holder in a processing apparatus according to a comparative example, showing a case of coating peeling. DETAILED DESCRIPTION

[0020] Hereinafter, a specific structure of the present embodiment will be described with reference to the drawings. The following description shows a preferable embodiment of the present disclosure, and the scope of the present disclosure is not limited by the following embodiment. In addition, the structure described in the present embodiment is not necessarily all required as a means for solving the problem. The following description and drawings are appropriately omitted or simplified for clear description. In each drawing, the same reference numeral is assigned to the same element, and repeated description is omitted as necessary.

[0021] (EMBODIMENT)

[0022] A processing apparatus according to the present embodiment will be described. Figure 1 is a perspective view of a processing apparatus according to an example embodiment. Fig. 2 is a perspective view of a holder and a jig of a processing apparatus according to an example embodiment, Figure 2A showing the holder, Figure 2B showing the jig. Figure 3is a sectional view of a shaft and a coating in a through-hole of a holder in a processing apparatus to which the example embodiment is related. As shown in Figures 1-3 The processing apparatus 1 has a holder 10 and a jig 20. The processing apparatus 1 performs, for example, processing of bending a wire of a coil such as a flat member 60.

[0023] Here, for convenience of explanation of the processing apparatus 1, XYZ orthogonal coordinate system is introduced. For example, the Z-axis direction is taken as the vertical direction, the upper side is taken as the +Z-axis direction, and the lower side is taken as the -Z-axis direction. In addition, the XY plane is taken as the horizontal plane. Note that the XYZ orthogonal coordinate system is introduced for convenience of explanation and does not indicate the actual arrangement direction of the processing apparatus 1.

[0024] The holder 10 has, for example, a disc shape. The holder 10 has a planar holder face 11 on the upper face. Note that the holder 10 can have the holder face 11 and is not limited to the disc shape, but can be a plate shape, a semi-spherical shape, or the like. The holder 10 has a through-hole 12 that penetrates the holder 10 in the holder face 11. Thus, the holder face 11 can be a circular ring shape with the through-hole 12 formed in the center. The central axis of the through-hole 12 extends in the Z-axis direction.

[0025] The jig 20 has a flange 30 and a shaft 40. The flange 30 and the shaft 40 can be integrally formed. The flange 30 has, for example, a disc shape. The flange 30 has a planar flange face 31 on the lower face. Note that the flange 30 can have the flange face 31 and is not limited to the disc shape, but can be a plate shape, a semi-spherical shape, or the like.

[0026] The shaft 40 has, for example, a circular bar shape. One end of the shaft 40 is connected to the flange face 31 of the flange 30. The shaft 40 is orthogonal to the flange face 31. Thus, the flange face 31 can be a circular ring shape with the shaft 40 connected in the center. The central axis of the shaft 40 extends in the Z-axis direction.

[0027] The shaft 40 can have a fitting portion 41 and a support portion 42. The fitting portion 41 is connected to the support portion 42. The fitting portion 41 is a portion of the shaft 40 on the one end side, that is, the +Z-axis direction side of the shaft 40. The support portion 42 is a portion of the shaft 40 on the -Z-axis direction side. The fitting portion 41 slides in the through-hole 12. The support portion 42 protrudes from the through-hole 12. The diameter of the fitting portion 41 can be larger than the diameter of the support portion 42.

[0028] The shaft 40 passes through the through-hole 12 provided in the holder 10. For example, the fitting portion 41 of the shaft 40 is fitted in the through-hole 12. The flange surface 31 faces the holder surface 11. The flat member 60 is disposed between the flange surface 31 and the holder surface 11. The shaft 40 moves in the Z-axis direction with respect to the holder 10. The shaft 40 moves in the Z-axis direction so that the distance between the flange surface 31 and the holder surface 11 changes. In this case, the fitting portion 41 slides in the through-hole 12 in the Z-axis direction.

[0029] In addition, the shaft 40 rotates with respect to the holder 10 with the center axis as the rotational axis. In this case, the fitting portion 41 slides in the through-hole 12 in the rotational direction around the rotational axis. The holder 10 and the jig 20 can be integrated and rotate with the center axis as the rotational axis.

[0030] The coating layer 50 is formed on the surface of the shaft 40. Thus, the jig 20 has the coating layer 50 formed on the surface of the shaft 40 in addition to the flange 30 and the shaft 40. The coating layer 50 can be formed on the entire surface of the shaft 40 without being formed on the flange 30, or can be formed on the entire jig 20 including the flange 30 and the shaft 40. In addition, the coating layer 50 can be formed only on the fitting portion 41 of the shaft 40 without being formed on the support portion 42 of the shaft 40. By forming the coating layer 50 only on the portion where the coating layer 50 is needed, it is possible to reduce the cost of materials and processing time and the like.

[0031] The hardness of the coating layer 50 and the shaft 40 is higher than the hardness of the holder 10. In addition, the hardness of the coating layer 50 can be higher than the hardness of the shaft 40. The mutual relationship of the hardness of the coating layer 50, the shaft 40, and the holder 10 will be described later together with the comparative example.

[0032] Next, the operation of the processing device 1 will be described. FIG. 4 is a diagram illustrating the operation of the processing device 1 according to the embodiment, Figure 4A indicating the disposition of the flat member 60, Figure 4B indicating the clamping and bending of the flat member 60, Figure 4C indicating the release of the flat member 60. Figure 4A 、 Figure 4B and Figure 4C the upper part of the figure indicates the cross section of the A-A plane at the lower part.

[0033] As shown in Figure 4A , the flat member 60 is disposed in the processing device 1. Specifically, the flat member 60 is passed between the flange surface 31 of the flange 30 and the holder surface 11 of the holder 10. The height H of the flat member 60 before bending is, for example, the height H1. The width W of the flat member 60 before bending is, for example, the width W1. The height H of the flat member 60 is the length in the Z-axis direction on the holder surface 11. The width W of the flat member 60 is the length in the horizontal direction on the holder surface 11.

[0034] Next, asFigure 4B As shown, a force F in the Z-axis direction is applied to the clamp 20. This clamps the flat member 60 between the flange surface 31 and the retainer surface 11. Thus, the clamp 20 and retainer 10 hold and constrain the flat member 60. Specifically, the flat member 60 is held and constrained between the flange 30 and the retainer 10. At this time, the shaft 40 slides within the through hole 12 in the Z-axis direction to clamp the flat member 60. The clamped height H of the flat member 60 changes to, for example, height H2. The height H2 of the flat member 60 is smaller than the height H1. Next, with the flat member 60 clamped between the flange surface 31 and the retainer surface 11, the retainer 10 and the clamp 20 rotate about a rotation axis. This causes the processing device 1 to bend the flat member 60 about the rotation axis. Thus, the retainer 10 and the clamp 20 have a rotation axis that rotates along the bending direction of the flat member 60. Therefore, the retainer 10 and the clamp 20 can rotate along the bending direction of the flat part 60.

[0035] Next, as Figure 4C As shown, the clamp 20 is moved in the +Z axis direction. This causes the machining device 1 to release the flat part 60. Then, the machining device 1 feeds the portion of the flat part 60 that will be bent next between the retainer surface 11 and the flange surface 31. The machining device 1 performs the bending process of the flat part 60 by repeatedly performing this action. Figure 5 This is a top view illustrating the coil involved in the illustrative embodiment. For example... Figure 5 As shown, the processing device 1 forms a coil 61 by repeatedly bending the flat part 60 and stacking it in a spiral shape along the vertical direction.

[0036] Next, before explaining the effects of this embodiment, the processing apparatus involved in the comparative example will be described. Then, the effects of this embodiment will be explained in comparison with the comparative example.

[0037] Equipment that produces coils 61 from flat parts 60, such as winding machines, requires high-speed sliding to improve productivity. It can be argued that if machine oil, used to facilitate smooth high-speed sliding, adheres to the coil 61, it will negatively impact the coil 61 in subsequent processes. Therefore, such processing equipment does not use machine oil. To address this, as a countermeasure against adhesion of the shaft 40, which slides at high speed without lubrication, a coating 50 with a low coefficient of friction (μ) is formed on the surface of the shaft 40.

[0038] However, if the durability of coating 50 is insufficient, coating 50 will peel off. This results in metal-to-metal slippage between the retainer 10 and the shaft 40. Consequently, adhesion and breakage between the retainer 10 and the shaft 40 are inevitable. Therefore, the durability of the processing apparatus is reduced.

[0039] Fig. 6 is a sectional view illustrating an axis and a coating layer in a through-hole of a holder of a processing device to which a comparative example pertains, Figure 6A indicates a case of coating layer wear, Figure 6B indicates a case of coating layer peeling. As Figure 6A and Figure 6B indicated, as a cause of the sticking that occurs between the holder 10a and the axis 40a, the wear and peeling of the coating layer 50a can be exemplified. Specifically, in a case where the hardness of the axis 40a and the coating layer 50a is lower than the hardness of the holder 10a, the coating layer 50a of the axis 40a is worn and peeled due to the sliding with the holder 10a, becomes metal sliding, and thus the sticking occurs. In the case of the processing device of the comparative example, the hardness relationship of the holder 10a, the coating layer 50a, and the axis 40a becomes the relationship of the following (1) formula.

[0040] Hardness (holder) > Hardness (coating layer) ≥ Hardness (axis) (1)

[0041] This relationship can also be applied to the hardness relationship of the parts at the general processing point. That is, in the processing device of the comparative example, the hardness of the sliding object parts such as the holder 10a, and the coated parts such as the coating layer 50a and the axis 40a becomes the following (2) formula.

[0042] Hardness (sliding object part) > Hardness (coating layer) ≥ Hardness (coated part) (2)

[0043] Next, the effect of the present embodiment will be described. In the processing device 1 of the present embodiment, unlike the comparative example, the hardness of the coating layer 50 and the axis 40 is greater than the hardness of the holder 10. That is, in the present embodiment, the hardness relationship of the coating layer 50, the axis 40, and the holder 10 becomes the relationship of the following (3) formula.

[0044] Hardness (coating layer) ≥ Hardness (axis) > Hardness (holder) (3)

[0045] Thus, since the holder 10 is deformed by the sliding external force, the sticking can be suppressed. This relationship can also be applied to the hardness relationship of the parts at the general processing point. That is, generalizing the processing device 1 of the present embodiment, the hardness relationship of the coated parts such as the coating layer 50 and the axis 40, and the sliding object parts such as the holder 10 can satisfy the following (4) formula.

[0046] Hardness (coating layer) ≥ Hardness (coated part) > Hardness (sliding object part) (4)

[0047] In addition, it can be considered that the cause of the adhesion of the shaft 40 is both the abrasion and the peeling as described above, but the development of the adhesion due to the abrasion is more feared than the peeling. In particular, in the case where the sliding is the dominant action, the development of the adhesion due to the abrasion is more feared than the peeling. Therefore, it is preferable that the hardness of the coating layer 50 is higher than the hardness of the shaft 40. That is, it is preferable that the following (5) and (6) are satisfied.

[0048] Hardness (coating layer) > Hardness (shaft) (5)

[0049] Hardness (coating layer) > Hardness (coated part) (6)

[0050] The processing device 1 of the present embodiment can improve the durability and suppress the adhesion of the shaft by taking the countermeasures as described above.

[0051] The above describes the embodiments of the present disclosure, but the present disclosure includes appropriate modifications that do not destroy the purpose and advantages thereof, and is not limited to the above-described embodiments. In addition, each structure in the embodiments can be appropriately combined.

[0052] From the above-described disclosure, it is apparent that the embodiments of the present disclosure can be varied in various ways. Such variations should not be considered as departing from the spirit and scope of the present disclosure, and all such modifications apparent to those skilled in the art are intended to be included in the following claims.

Claims

1. A processing apparatus comprising a holder and a clamp, The retainer has a rotation axis that rotates along the bending direction of the flat member. The clamp and the retainer clamp and restrain the flat member, and have the axis of rotation that rotates along the bending direction. The clamp has a flange, a shaft, and a coating. The flange clamps the flat member between the flange and the retainer, thereby restraining the flat member. The shaft is connected to the flange and passes through a through hole provided in the retainer. The shaft has a fitting portion that slides within the through hole and a support portion that protrudes from the through hole. The coating is formed on the surface of the mating portion of the shaft. The coating has a higher hardness than the base material of the shaft, and the base material of the shaft has a higher hardness than the retainer.

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