JP3645937B2 - Sheet metal bending press machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a sheet metal bending press machine in which a sheet metal is fastened to a lower mold by a pressing mold and bent by movement of a blade or the like.
[0002]
[Prior art]
This type of sheet metal bending press is applied to, for example, a so-called C-shaped frame in which an upper frame is pivotally supported at the rear end so as to be swingable up and down. However, a stamping die is attached to the upper frame, and the sheet metal is bent along the inner pinch sandwiched between the lower die and the stamping die. Although there are various bending shapes of the sheet metal, for example, dovetail bending in which both ends are refracted in two steps and inverted into a U-shape may be taken (see the shape of the sheet metal W in FIG. 7). When the other one side is further bent from this ant-bending shape, a die having a both-side toe protrusion shape that can be inserted into the inner method between the both side ends (referred to as a width assembling die in this specification) Because of the necessity of knitting, the press die was composed of a combination of a number of dies including an exchange die so that the width can be adjusted (see FIG. 9).
[0003]
FIG. 9 shows a combination state of the stamping dies 54 in a conventional sheet metal bending press machine, in which the knitting of the width molding die that fits in the dovetail bending of the sheet metal is performed at the center portion of the lower die 53. Therefore, the mold changing device for this knitting was equipped in the central part of the machine. As for the knitting of the width assembly mold, an exchange mold 58 for narrow width adjustment and both side molds 60, 60 sandwiching it are mainly used, and a large number of spare molds 62, 62,. Are arranged to correspond to the internal dimensions of the sheet metal dovetail bending. Further, on both sides, long dies 64, 64 occupying most of the pressing die 54 are arranged, and when bending the tip of the sheet metal W which is refracted only on one side (see FIGS. 4, 5, and 8). ), Either the side mold 60 or the spare mold 62 is the end mold, and the end assembled mold is knitted in which the toe 66 projects from the end.
[0004]
[Problems to be solved by the invention]
According to the conventional sheet metal bending press as described above, when bending a sheet metal, the center part is normally used at all times. It was inconvenient that it was necessary to suspend it. In other words, in the operating state, the replacement mold 58 at the pivotal point cannot be allowed to play at the time of bending, and even if no replacement mold is used, it can be tightened to the lower mold at the time of bending. Since the exchange is impossible, a special operation time is required for exchanging the exchange mold, and during that time, the operation is substantially suspended, which is a major cause of hindering work efficiency.
[0005]
Another cause of hindering work efficiency is the movement of the long dies 64, 64 on both sides in the knitting of the wide dies and the knitting of the end dies. That is, when the bending work is normally performed, the long metal molds 64 and 64 on both sides are brought close to the center (the state shown in FIG. 9), but the wide assembling mold and the end that can be accommodated in the dovetail bending or one side bending of the sheet metal. In order to knit the assembled mold, the long molds 64, 64 are retracted on both sides or one side (see the arrow in FIG. 9), so that time is taken for the reciprocation. Moreover, since it requires power for that purpose, it was also a problem in terms of energy saving.
[0006]
In view of the actual situation as described above, the present invention is capable of exchanging exchange dies even during normal bending work operation, and, in addition, knitting a wide assembling mold that fits in a dovetail bending of a sheet metal, An object of the present invention is to provide a sheet metal bending press machine that does not require the movement of a long die (referred to as a fixed die in this invention) for the knitting of an end assembled die that fits in a semi-ant bending.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a sheet metal bending press machine in which a sheet metal is fastened to a lower mold U by a pressing mold P and bent by a blade. The pressing mold P is an exchange provided in the mold exchanging device E. The mold 8a and the side molds 8b on both sides, the both-side toe protruding shape spare mold 9a, the spare mold 9b, and the fixed mold 7 are arranged in that order, and the mold exchanging device E includes a moving unit 16. The lower mold can be moved between the lower mold and the lower mold, and the lower mold is provided with a mold exchanging base B. It is possible to knive a wide assemblage mold with the side molds 8b on both sides or the spare molds 9a on both side toe projections, or in combination with the reserve molds 9b, and half-ant bends where only one end is refracted. In this case, the fixed mold 7, the auxiliary mold 9b, and the both-side toe protruding shape auxiliary mold 9a are arranged from the fixed mold side. Characterized by organizing the end sets mold with.
[0008]
Furthermore, with respect to this sheet metal bending press machine, an automatic width measuring device for automatically reading the sheet metal width and inputting it to the computer is provided so that the knitting of the width mold can be automatically performed by computer control. May be provided along the mold.
[0009]
[Operation]
Since the sheet metal bending press machine is configured as described above, for simple bending of the sheet metal, a fixed mold is mainly used as the pressing mold, and a spare mold is used as necessary. In addition, if necessary, you can knitting a wide mold that fits in the dovetail at one end where the fixed mold is missing, and of course, if you put all the spare molds close to the fixed mold, only one end will bend. It is also possible to knitting end assembled molds that fit in half-ant bends. Therefore, any knitting does not involve the movement of the fixed mold.
[0010]
Among the above knitting for the press die, the exchange die and the side dies on both sides are not used except when it is necessary to bend by end knitting knitting. In this case, the molds can be returned to the mold exchanging base, and the exchange molds can be exchanged while bending with other molds such as a fixed mold and a spare mold. The dovetail means a dovetail shape in which both side ends are inverted inward, and there are several steps of bending, not limited to one or two steps on one side.
[0011]
【Example】
Next, an embodiment of the present invention will be described with reference to the drawings.
[0012]
The drawing shows an example implemented in a C-shaped frame in which an upper frame 2 is pivotally supported by a pin 3 at a rear end portion of the lower frame 1 (FIG. 2). In the opening of the C-shaped frame, the lower frame is shown. 1 is equipped with a lower mold U, and the upper frame 2 is equipped with a pressing mold P, and a metal plate W clamped by the lower mold U is bent by a blade 4. A width measuring device G for the sheet metal W is provided along the lower mold U.
[0013]
As for the outline of the bending mechanism, a driving device 5 by a crank mechanism is provided in the lower frame 1 for driving the blade 4 and the upper frame 2, and the upper frame 2 is shaken via an arcuate linkage 6. The movement is made. Various equipment such as a mold exchanging device E, which will be described later, is mounted on the upper frame 2 (FIG. 1), and the upper frame 2 including them is moved up and down as a whole.
[0014]
The lower die U has a length close to the entire length of the machine, and is removed at one end portion so that the width position thereof serves as a die exchange base B. Therefore, in the mold exchanging base B, the bending process of the sheet metal W cannot be executed, but the mold exchanging apparatus E operates effectively even during the bending process.
[0015]
A beam 10 is horizontally mounted on the upper frame 2 as a base material for mounting and guiding the stamping die P, and the stamping die P is a fixed die 7 to which the most part is directly attached, In addition to the fixed mold 7, an exchange mold 8 a that is indirectly attached to the beam 10, side molds 8 b and 8 b on both sides thereof, and a number of spare molds 9 a and 9 b that are brought close to the fixed mold 7. , 9b,...
[0016]
The fixed mold 7 is removed at one end of the lower mold U at the mold exchange base B side, and there is an arrangement of spare molds 9a, 9b, 9b,. Since the leading auxiliary mold 9a has a protruding shape on both sides of the toes 12, 12 protruding from both sides, if all the auxiliary molds 9a, 9b, 9b,. 1, the case of FIGS. 3 to 5), the end assembled mold Pa that can be accommodated in the half-ant bend is knitted. Further, by combining the replacement mold 8a with the side molds 8b and 8b on both sides thereof, or by combining it with one or several spare molds 9a, 9b, 9b,. 1 is knitted (the two-dot chain line in FIG. 1 and FIGS. 6 and 7).
[0017]
The side molds 8b and 8b and the spare molds 9a, 9b, 9b,... Are respectively attached to support legs 8 and 9 that move along the beam 10 (FIG. 1). And the auxiliary metal molds 9a, 9b, 9b,... And the side metal mold 8b on one side are provided with connecting devices 11 at their support legs 8, 9. Incidentally, the connecting device 11 is formed by fitting the male body 11a and the female body, and the connected state is individually connected to the connecting device 11 of the spare molds 9a, 9b, 9b,. It is locked by the air cylinder installed in
[0018]
As for the movement of the support legs 8 and 9, an air cylinder 13 for movement is attached to the front side of the beam 10, and it is connected to the support leg 9 of the leading auxiliary mold 9a. Therefore, by driving the air cylinder 13, the whole of the preliminary molds 9a, 9b, 9b,... Is brought close to the fixed mold 7 (knitting of the end assembled mold Pa). Further, not only the leading spare mold 9a can be connected to the side mold 8b but also the other spare mold 9b is continuously connected to the spare mold 9a for the knitting of the width assembled mold Pb. A plurality can be connected to 8b (in the case of FIG. 6).
[0019]
The mold exchanging device E is equipped in relation to the structure for knitting the width-set mold Pb, and both side molds 8b, 8b can be opened and closed, and the exchange mold 8a is detachably sandwiched therebetween. It is supposed to be attached. As for opening and closing, a turnbuckle mechanism is adopted by providing a rotating shaft 17 with both ends reversely screwed upward, and the support legs 8 and 8 of the side molds 8b and 8b are screwed to the rotating shaft 17 at the upper end. . Further, the mold exchanging device E has a moving part 16 composed of the support legs 8, 8, etc. of the side molds 8 b, 8 b. The positions of the molds 8b and 8b vary.
[0020]
For attaching / detaching the exchange mold 8 a, the holder 21 of the exchange mold 8 a is attached to the tip of the reversing arm 19. Reference numeral 23 denotes an inversion axis of the inversion arm 19, and the inversion position is indicated by a two-dot chain line upward. Here, the storage impeller 25 is replaced with a predetermined exchange mold 8a selected from the storage impeller 25, and the storage impeller 25 moves in the direction of the arrow at the time of replacement. Reference numeral 27 denotes a rotating shaft of the storage impeller, and a large number of exchange molds 8a are loaded so as to be exchangeable around the rotation shaft.
[0021]
The holder 21 is fitted to the reversing arm 19 so that the reversing arm 19 expands and contracts, and air cylinders 29 and 29 are attached to both sides of the reversing arm 19 for vertical movement. This expansion / contraction structure is necessary for exchanging the exchange mold 8a. When knitting the wide assembly mold Pb, it is necessary to remove the wide assembly mold Pb from the dovetail of the sheet metal W. Also used for narrowing.
[0022]
Next, a procedure for bending the sheet metal W into a box shape in which the edges of the four sides are inwardly closed will be described with reference to FIGS.
[0023]
When the sheet metal W having the four corners cut out in advance as described above is placed on an insertion table (not shown) (FIG. 3), the four sides are sequentially bent while rotating counterclockwise. As for the first edge Ha to be inserted first, the fixed mold 7 is used in principle, and the spare molds 9a, 9b, 9b,... Are used as necessary (see the two-dot chain line). ). In any case, since the exchange mold 8a and the side molds 8b and 8b are not necessary, the knitting of the minimum width assembling mold Pb is waited on the side (see the two-dot chain line) and the knitting needs to be changed. If there are, these molds return to the mold exchange base B (solid line).
[0024]
Next, when the second edge Hb is bent (FIG. 4), the pressing mold P should not be applied to the first edge Ha that has already been bent. The end assembled mold Pa brought close to 7 is knitted, and bending is performed by applying the first edge Ha to the leading preliminary mold 9a. In order to accurately perform this edge-hanging and to measure the width of the sheet metal W by the width measuring device G, a first guide scale 31 is projected from the insertion base of the sheet metal W. However, this is sunk down when not needed.
[0025]
The bending of the third edge Hc (FIG. 5) is the same as the bending of the second edge Hb. In the knitting of the end assembly mold Pa, the second edge Hb that has already been bent is the head. Is placed on the spare mold 9a. Although the upper frame 2 is moved up and down each time for bending as described above, the exchange mold 8a is exchanged at the mold exchange base B regardless of this.
[0026]
In the case of bending the last fourth edge Hd (FIG. 6), the sheet metal W has a dovetail shape in the width direction of the edge Hd, that is, the direction in which the width is measured by the width measuring device G. (FIG. 7), it is necessary to bend it by the width molding die Pb. In this case, the minimum width assembling mold Pb that has already been knitted or the exchange mold 8a has been exchanged may be used (see the two-dot chain line in FIG. 1). Accordingly, a wide assembling die Pb in which the spare dies 9a and 9b are incorporated and greatly knitted is used (see the three-dot chain line in FIG. 1 and FIG. 7). In any case, the width molding die Pb is used from a location where only the thickness of the sheet metal W is separated from the second guide scale 32.
[0027]
The width measuring device G is configured to measure from the first guide scale 31 as a base point and away from the fixed mold 7 side, and rotatably supports the screw helical shaft 35, and the proximity by light. When the sensor 37 is screwed and the spiral shaft 35 is rotated by the motor 39, the proximity sensor 37 scans to the side end of the sheet metal W, and the rotation of the spiral shaft 35 is read by the counter 41. The value is input to a computer and is calculated together with information such as a bending dimension that is input in advance, and the knitting of the width molding die Pb is automatically performed.
[0028]
【The invention's effect】
As described above, according to the present invention, the following excellent effects are obtained.
[0029]
The width adjustment of the width assembly mold that can be accommodated in the dovetail where both ends of the sheet metal are refracted inward is possible by exchanging the replacement mold or incorporating the spare mold, as well as by knitting the end assembly mold Except when bending is performed, the exchange mold can always be replaced, and it can be done during sheet metal bending operations, so that no special time is taken for mold replacement. In addition, since the fixed mold does not move due to various knitting changes, the work efficiency can be greatly improved, and it is also suitable for energy saving.
[0030]
Since the movement of the fixed mold is unnecessary and the spare mold is arranged only on one side, the structure is simplified as a whole. Further, in the knitting of the end assembly mold that can be accommodated in the half-ant bend, the effective usage length of the press mold is substantially close to the full length (about half of the conventional one).
[0031]
When the width measuring device is provided (Claim 2), the work efficiency can be further improved.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a main part of one end of a bending press for sheet metal as viewed from the front.
FIG. 2 is an explanatory diagram viewed from the side of a sheet metal bending press.
FIG. 3 is an explanatory view seen from a plane showing a procedure for bending the first edge of the sheet metal.
FIG. 4 is an explanatory view seen from a plane showing a procedure for bending a second edge.
FIG. 5 is an explanatory view seen from a plane showing a procedure for bending a third edge;
FIG. 6 is an explanatory view seen from a plane showing a procedure of bending a fourth edge.
FIG. 7 is an explanatory diagram viewed from the front side of a state in which a wide die is housed in a dovetail bending of a sheet metal.
FIG. 8 is an explanatory view of the width measuring device as viewed from the front.
FIG. 9 is an explanatory diagram of a conventional example.
[Explanation of symbols]
B Mold exchange base E Mold exchange device G Width measuring device P Stamping die Pa End assembly die Pb Width assembly die U Lower die W Sheet metal 7 Fixed die 8a Replacement die 8b Side die 9a First reserve die Mold 9b Spare mold 12 Toe 16 Moving part of mold changing device

Claims (2)

In a sheet metal bending press machine in which a sheet metal is fastened to a lower mold (U) with a pressing mold (P) and bent with a blade ,
The pressing mold (P) includes an exchange mold (8a) provided on the mold exchanging device (E), a side mold (8b) on both sides, a two-side toe protruding shape preliminary mold (9a), and a spare mold (9b). And a fixed mold (7) arranged in that order,
The mold exchanging device (E) includes a moving part (16) and can move between the upper part of the lower mold and the notch part of the lower mold. (B)
When the dovetail is bent, the replacement mold (8a) and the side molds (8b) on both sides thereof, or the both-side toe-projecting preliminary molds (9a), or the spare mold (9b) In combination, a wide die can be knitted, and in the case of half-ant bending where only one end is refracted, the fixed die (7), the auxiliary die (9b), and the both-side toe protruding shape auxiliary die (from the fixed die side) 9a) is a sheet metal bending press characterized by knitting an end assembled die . 2. The sheet metal bending press according to claim 1, wherein an automatic width measuring device for reading the width of the sheet metal is provided along the lower mold.

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