JP3883501B2 - Press bonding method for plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is related to a method of joining sheet metal material two mutually abutting sides by pressing the flush. Metal case which is manufactured using this method is used in the housing or the like of electric and electronic equipment used for various industrial.
[0002]
[Prior art]
One method for joining plate materials is pressing. As a conventional representative example of this press working joining, there is a joining method using caulking, which is widely used because it is relatively simple and inexpensive. Further, as a representative example of the use destination of this press bonding method, it is used for manufacturing a metal case for storing electrical / electronic devices used in various industries. The conventional caulking-based joining method is that when two plates are overlapped, one plate is provided with a hole (through portion, the same applies to Patent Document 2 and the following), and the other plate is provided with a bag-like projection (projection). There is a joining method in which two plates are joined by fitting a bag-like projection into a hole and then caulking (burring caulking) with a punch of a press. And the sheet metal (storage) case which is a metal case is manufactured using this joining method (refer patent documents 1 and 2).
In addition, as a method of joining the butted plates flush with each other, a concave portion and a convex portion that can be fitted to opposite sides are provided, the opposite sides are fitted flush with each other, and the periphery of the concave portion is caulked by pressing or the like. Thus, there is a joining method in which the convex portion is strongly fitted into the concave portion (see Patent Document 2).
In addition, as a method other than the press for joining the butt plates flush with each other, there is also a method of joining by applying various weldings (arc welding, resistance welding, etc.) shown as the prior art in Patent Document 2 to the seam (patent) (Refer to Literature 2, Fig. 7 and Fig. 8).
[0003]
[Patent Document 1]
JP 2001-96325 A (page 2, FIG. 2, FIG. 5, FIG. 7)
[Patent Document 2]
Japanese Patent Laid-Open No. 6-302973 (Page 2, FIGS. 1 to 4, 7, and 8)
[0004]
[Problems to be solved by the invention]
In the case of the joining method using caulking by overlapping the above-mentioned plates to be joined, the metal thin plate not only has an excessive strength, but also cannot effectively use the space in the case, and cannot give a more accurate dimensional accuracy. There's a problem. If it is the method of joining a butt | matching board in this point, the space in a case can be used effectively and dimensional accuracy improves. However, in the method of caulking the periphery of the recess shown in Patent Document 2, even when actually used in the storage case, it can be seen from the fact that the caulking method of the overlapping plate is used together (see Patent Document 2, FIG. 1). However, there is a problem that sufficient bonding strength is not always obtained, and the surroundings are linearly pressed and brought closer together, so that overlaying tends to occur on the plate surface. In addition, although the joining method using welding has no problem in strength, there are problems in the number of manufacturing steps and high cost. Moreover, the metal case manufactured by the conventional caulking method has the same problem.
[0005]
The present invention has been made in view of the above problems, it has been made in attempting a new press bonding without being bound to the conventional method of bonding caulking use, and has as purpose of that, when joined with and flush with the butt sheet metal, resulting in the desired bonding strength, without causing unwanted deformation, is manufacturability, Hisage press bonding method of the sheet material to be low-cost Kyosu Rukoto .
[0006]
[Means for Solving the Problems]
In order to achieve the first object, the press bonding method of the plate material according to claim 1,
The first and second plates to be abutted are formed in a concavo-convex shape so that the abutting sides that abut each other, the first plate and the second plate are joined together, and both plates are joined by a pressing process. In the press bonding method of the plate materials to be joined,
The plate is a thin metal plate;
The joint lines on both sides of the abutment are perpendicular to the abutment direction , and are connected in parallel by connecting the reference lines in which two parallel lines are alternately provided in the form of a broken line and the broken lines of the reference line. One line formed by the pressurization line of the bowl-shaped line, and the peripheral part of the pressurization line is a pressurization part,
The gap between the seam lines is set to a size that allows the fitting sides to be fitted together, and a size that is filled by the amount of plastic deformation that occurs in the pressing process,
The pressing step includes punches having a plurality of circular cross sections that perform a pressing operation on the pressing portion on one surface of the first plate and the second plate that are fitted flush with each other;
A flat plate-shaped receiving die that receives the press by the punch at the position of the other back surface corresponding to the pressing portion;
An upper support mold that supports the plate thickness direction from the punch side, a horizontal support mold that supports the horizontal plane direction of the first and second plates, the upper support mold and the receiving mold, and the first plate or the second plate, respectively. A positioning shaft for positioning the first and second plates by engaging with a positioning hole provided; and
By pressing the punch, the pressing portion on the punch working surface side has a depth of 10% to 20% of the thickness of the first and second plates, and has the same circular shape as the punch cross-sectional shape. The first plate and the second plate are joined by filling the gap of the seam line by plastic deformation due to the formation of the recess.
[0007]
Moreover, the press bonding method of the plate material according to claim 2 is:
The first and second plates to be abutted are formed in a concavo-convex shape so that the abutting sides that abut each other, the first plate and the second plate are joined together, and both plates are joined by a pressing process. In the press bonding method of the plate materials to be joined,
The plate is a thin metal plate;
The joint line on both sides of the abutting side is formed by a reference line provided in at least one broken line shape in a direction perpendicular to the abutting direction, and a pressurizing line having an arbitrary shape connecting the broken lines of the reference line. A peripheral portion of the pressurizing line is a pressurizing part,
The gap between the seam lines is set to a size that allows the fitting sides to be fitted together, and a size that is filled by the amount of plastic deformation that occurs in the pressing process,
The pressing step includes a plurality of first punches that perform a pressing operation on the pressing portion on one surface of the first plate and the second plate that are fitted flush with each other.
A plurality of second punches that operate together with the first punch with respect to the position of the other back surface of the pressure unit,
A support die for supporting and positioning both plates during pressing in the horizontal plane direction and the plate thickness direction of the first and second plates,
By simultaneously pressing the first and second punches, the pressure portions on both front and back surfaces of both punch actions have a depth of 10% to 20% of the thickness of the first and second plates, The first plate and the second plate are bonded to each other by filling the gap between the seam lines by plastic deformation due to the formation of the recesses on both the front and back surfaces.
[0008]
Moreover, the press bonding method of the board | plate material which concerns on Claim 3 is compared with the press bonding method of Claim 1.
Instead of the seam line with the above two reference lines and the saddle-shaped pressure line,
(A) one reference line and an acute pressure line;
(B) two reference lines and a continuous semicircular pressure line;
(C) Three reference lines and a wavy pressure line,
A set of 3 seam lines is selected,
Instead of the circular cross-sectional shape of the punch, a cross-sectional shape selected from one of an ellipse, a square, and a polygon.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments corresponding to the above-described claims will be described below with reference to the drawings. First, in the first embodiment, the metal case 1 is manufactured by a press bonding method corresponding to claim 1 . As shown in FIG. 1, the metal case 1 is a rectangular short cylinder in which one rectangular thin metal sheet is bent to open both ends, and a seam line 2 is formed on one side 1 a of the square short cylinder. The thin metal plate here is a metal plate having a thickness of 0.5 to 2 mm. Cold rolling steel plates (JIS G 3141, SPCC, etc.) are generally used, and other stainless steel plates, non-ferrous plates, etc. can be selected as appropriate.
[0010]
The side surface 1a of the metal case 1 corresponds to the fitting state of the first plate and the second plate according to claim 1, and the abutting sides 1b and 1c directly correspond to the first and second plates. The shape is formed in an uneven shape that can be fitted. Therefore, as shown in FIG. 2, the seam line 2 generated by the fitting state of both the abutting sides 1b and 1c includes two reference lines 3a and 3b provided in parallel in a broken line shape in a direction perpendicular to the abutting direction F. Thus, the reference line 3 is formed into a single line by the hook-like pressure line 4 connecting the broken lines. Further, the peripheral portion of the pressurizing line 4 is the pressurizing unit 5. The gap S of the seam line 2 shown in FIG. 2 is set to a size that allows the fitting sides 1b and 1c to be fitted, and a size that is filled by the amount of plastic deformation generated in the pressing process. By setting the gap S to a size that allows fitting, the minimum value is taken into consideration so that the tolerance is not too narrow. On the other hand, by setting the size to be filled with the amount of plastic deformation, the tolerance is too wide. The maximum value is taken into consideration. A specific numerical value of the gap S is determined by processing conditions such as a processed plate type, a plate thickness, and a press area.
[0011]
Next, the press apparatus will be described. As shown in FIG. 3, the press device includes a punch 6, a receiving die 7, a supporting die, a lateral supporting die 8 and 9, and a positioning shaft 10. The punch 6 has a circular cross section, and presses the pressurizing unit 5 on one surface of the abutting sides 1b and 1c that are fitted flush with each other, and a plurality of punches 6 correspond to the plurality of pressurizing units 5 simultaneously. Is installed. The receiving die 7 is formed in a flat plate shape that can receive the pressing of the punch 6 at the position of the other back surface corresponding to the pressurizing portion 5 on which the punch 6 acts. When the dimensional accuracy of the metal case 1 is increased, the receiving die 7 has a size matched to the inner side of the metal case 1. In other cases, the receiving die 7 corresponds to the cross-sectional shape of the punch 6 and can secure a sufficient area for the press. The size may be sufficient. The upper support die 8 supports both plates during pressing in the plate thickness direction of the both abutting sides 1b and 1c, and the horizontal support die 9 supports in the horizontal plane direction. The positioning shaft 10 is engaged with positioning holes 8a, 7a, and 1d provided in the upper support die 8, the receiving die 7, and the abutting side sides 1b and 1c, respectively, and in the lateral support die, the abutting side sides 1b and 1c. Is positioned. The lateral support mold 9 can be used simultaneously with the receiving mold 7 to increase the accuracy of the outer dimension or inner dimension of the metal case 1.
[0012]
The press joining process which manufactures the metal case 1 using the above press apparatus is demonstrated. First, both abutting sides 1b and 1c shown in FIG. 3 are operated simultaneously or sequentially in the order of the lateral support die 9, the positioning shaft 10, and the upper support die 8, and are supported and fixed by these (see FIG. 4A). ). Next, the punch 6 is pressed, and as shown in FIG. 4B, in the pressurizing unit 5, the concave portion 11 is formed in the same planar shape as the circular cross section of the punch 6. Note that not all of the pressurizing units 5 provided on the seam line 2 are punch-pressed. For example, the two places at both ends are omitted to prevent plate deformation, etc. And will be omitted as appropriate.
[0013]
The gap S of the seam line 2 is filled by plastic deformation by the punch 6 press, and both abutting sides 1b and 1c are joined. This bonding is performed on the pressurizing unit 5 by surface pressing of the end face of the punch 6 and can be adjusted by the cross-sectional area of the punch 6 to an area necessary for filling the seam line 2, not necessarily the entire pressurizing unit 5. Therefore, there is no unnecessary build-up, and sufficient bonding strength is possible. The depth D of the recess 11 is effectively 10% to 20% of the plate thickness (see FIG. 4B). That is, if it is 10% or less of the plate thickness, the amount of plastic deformation is small and the bonding strength is insufficient, and if it is 20% or more, the plastic deformation is excessively affected, causing problems such as plate deformation. Moreover, the depth D of the recessed part 11 optimal for joining can be formed by adjusting the use force of a press corresponding to the kind of processed board, board thickness, etc. Furthermore, since the punch 6 acts at right angles to the abutting sides 1b and 1c, no extra build-up occurs from this point.
[0014]
In addition, the press apparatus used for the press joining method mentioned above and its control may be installed as a part of the press processing line as FA and centrally controlled, or installed as a single apparatus operated individually. The installation form is selected.
[0015]
The reference line 3 and the pressurizing line 4 in claim 1 are not limited to the quantity and shape of the first embodiment described above, and differently shaped seam lines can be selected and used. For example, as shown in FIG. 5, one reference line 3 and an acute pressure line 15 (FIG. 5A), three reference lines 3a, b, c, and a wavy pressure line 16 (FIG. 5B). ) Two reference lines 3a and 3b and a continuous semicircular pressure line 17 (FIG. 5C). The cross-sectional shape of the punch 6 is not limited to the circular shape of the first embodiment, and various shapes such as an ellipse, a rectangle, and a polygon are selected, and various shapes specified by the alignment of the various pressure lines described above. It can be made to correspond to the pressurization part 5 (refer FIG. 5).
[0016]
For example, as shown in FIG. 6, the other metal case 21 is formed by joining an upper cylindrical body 21 a and a lower cylindrical body 21 b with a joint 22 at the center of the four sides. Thus, the not limited to the seam lines 2 joined at one location of the first embodiment, with respect to various shapes of the metal case, the joint and the number of seam lines also Ru chosen arbitrarily.
[0017]
Next, a description of a second embodiment of metals case using a press bonding method of claim 2. The second embodiment is different from the first embodiment in that the punch 13 is used instead of the receiving die 7 and the concave portions 11 are formed on both the front and back sides of the abutting sides 1b and 1c. That is, as shown in FIG. 7A, the press device is operated by the press operation together with the first punch 12 by the press operation on the pressing portion 5 on the one surface and the first punch 12 on the position of the other back surface. The second punch 13 and upper and lower support molds 8 and 14 are arranged to support both plates during pressing in the plate thickness direction. Since the other lateral support mold 9 and the positioning shaft 10 are the same, detailed description thereof will be omitted.
[0018]
And by pressing the 1st and 2nd punches 12 and 13 simultaneously, the pressurization part 5 of both surfaces which both punches have has a depth of 10% thru | or 20% of plate | board thickness, It is formed in the concave portion 11 having the same planar shape, and is joined by filling the gap of the seam line 2 by plastic deformation by forming the concave portion 11 on both the front and back surfaces (see FIG. 7B). The press bonding method in which the concave portions 11 are formed on both the front and back surfaces can secure sufficient plastic deformation, and is effective for thick plates even with thin metal plates. Further, the depth D of the recess 11 does not need to be the same depth on both sides, and one can be selected to be deeper and the other shallower. Further, the press speed is different between the first punch 12 and the second punch 13. Various processing conditions can be set, such as providing or making a difference in press working force, so that various processing plates can be sufficiently handled.
[0019]
【Example】
Processed plate Type SPCC Thickness 0.8mm
Punch diameter 4mm circular press working force 10-20 ton recess depth 0.1mm-0.2mm
Confirmation of strength of test plate shape shown in FIG.
(1) A load of 294 N (30 Kgf) is applied to the entire press part. As a result, the test plate is deformed without disconnection of the joining portion.
(2) Drop from a height of 2m. Repeat 5 times in succession. As a result, the joining portion does not come off and the test plate is not deformed.
[0020]
【The invention's effect】
As described above, in the press bonding method for plate materials according to claims 1 to 3, when a thin metal plate is abutted and bonded in a flush state, a necessary bonding strength is obtained and unnecessary deformation occurs. Therefore, it can be carried out with ease of manufacture and at low cost. In particular, with the press bonding method according to the second aspect, sufficient bonding strength can be secured even with a thick plate in a thin plate .
[Brief description of the drawings]
FIG. 1 is an external perspective view of a metal case according to a first embodiment.
FIG. 2 is a plan view including a partial cross section of a joint line according to the first embodiment.
FIG. 3 is a cross-sectional configuration diagram showing the press device of the first embodiment.
FIG. 4 is a cross-sectional view of the abutting side before pressing, and B is the same cross-sectional view after pressing.
FIG. 5 is a plan view of a seam line according to another embodiment.
FIG. 6 is an external perspective view of a metal case according to another embodiment.
FIG. 7A is a cross-sectional view showing the configuration of the first and second punches characteristic of the second embodiment, and B is a cross-sectional view of the abutting side after pressing.
FIG. 8 is a dimensional diagram of a test plate used for strength confirmation of an example.
[Explanation of symbols]
1, 21 Metal case 1b, 1c Abutting side 2 Seam line 3 (3a, 3b, 3c) Reference line 4, 15, 16, 17 Pressure line 5 Pressure part 6 Punch 7 Receiving die 8 Upper support die 9 Horizontal support Mold 10 Positioning shaft 11 Recess 12, 13 First, second punch 14 Lower support mold

Claims (3)

The first and second plates to be abutted are formed in a concavo-convex shape so that the abutting sides that abut each other, the first plate and the second plate are joined together, and both plates are joined by a pressing process. In the press bonding method of the plate materials to be joined,
The plate is a thin metal plate;
The joint lines on both sides of the abutment are perpendicular to the abutment direction , and are connected in parallel by connecting the reference lines in which two parallel lines are alternately provided in the form of a broken line and the broken lines of the reference line. One line formed by the pressurization line of the bowl-shaped line, and the peripheral part of the pressurization line is a pressurization part,
The gap between the seam lines is set to a size that allows the fitting sides to be fitted together, and a size that is filled by the amount of plastic deformation that occurs in the pressing process,
The pressing step includes punches having a plurality of circular cross sections that perform a pressing operation on the pressing portion on one surface of the first plate and the second plate that are fitted flush with each other;
A flat plate-shaped receiving die that receives the press by the punch at the position of the other back surface corresponding to the pressing portion;
An upper support mold that supports the plate thickness direction from the punch side, a horizontal support mold that supports the horizontal plane direction of the first and second plates, the upper support mold and the receiving mold, and the first plate or the second plate, respectively. A positioning shaft for positioning the first and second plates by engaging with a positioning hole provided; and
By pressing the punch, the pressing portion on the punch working surface side has a depth of 10% to 20% of the thickness of the first and second plates, and has the same circular shape as the punch cross-sectional shape. A press bonding method for plate materials, characterized in that the first plate and the second plate are bonded to each other by filling a gap between the seam lines by plastic deformation by forming the recess. The first and second plates to be abutted are formed in a concavo-convex shape so that the abutting sides that abut each other, the first plate and the second plate are joined together, and both plates are joined by a pressing process. In the press bonding method of the plate materials to be joined,
The plate is a thin metal plate;
The joint line on both sides of the abutting side is formed by a reference line provided in at least one broken line shape in a direction perpendicular to the abutting direction, and a pressurizing line having an arbitrary shape connecting the broken lines of the reference line. A peripheral portion of the pressurizing line is a pressurizing part,
The gap between the seam lines is set to a size that allows the fitting sides to be fitted together, and a size that is filled by the amount of plastic deformation that occurs in the pressing process,
The pressing step includes a plurality of first punches that perform a pressing operation on the pressing portion on one surface of the first plate and the second plate that are fitted flush with each other.
A plurality of second punches that operate together with the first punch with respect to the position of the other back surface of the pressure unit,
A support die for supporting and positioning both plates during pressing in the horizontal plane direction and the plate thickness direction of the first and second plates,
By simultaneously pressing the first and second punches, the pressure portions on both front and back surfaces of both punch actions have a depth of 10% to 20% of the thickness of the first and second plates, It is formed in a recess having the same planar shape as the punch cross-sectional shape, and the first plate and the second plate are joined by filling the gap of the seam line by plastic deformation due to the formation of the recess on both the front and back surfaces. Press bonding method for plate materials. Instead of the seam line with the above two reference lines and the saddle-shaped pressure line,
(A) one reference line and an acute pressure line;
(B) two reference lines and a continuous semicircular pressure line;
(C) Three reference lines and a wavy pressure line,
A set of 3 seam lines is selected,
The press bonding method for plate members according to claim 1, wherein one of a cross-sectional shape selected from an ellipse, a square, and a polygon is used instead of the circular cross-sectional shape of the punch .

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