JP6391111B2 - Mold changing table, multilayer processing system, and die changing method - Google Patents

Description

  The present invention relates to a press working apparatus.

  As a press working apparatus, for example, as disclosed in Patent Documents 1 and 2, a plurality of sets of press working molds (hereinafter referred to as working dies) are arranged in a mold clamping / die opening direction (for example, vertical direction). A multi-layer processing machine (also called a multiple press molding apparatus or the like) is known. According to this multi-layer processing machine, a plurality of processes can be performed at a time by a single press drive source (for example, a hydraulic cylinder) in a lateral space corresponding to a set of process dies, so a general press using a set of process dies. Compared to the case where each processing mold is processed separately by the processing machine, the installation space of the equipment and the equipment cost and running cost of the press drive source can be greatly reduced, and the movement distance of the operator can also be reduced. There are advantages such as improved efficiency. By the way, in this multi-layer processing machine, when dealing with a variety of low-volume production, there is a problem of how to efficiently replace a plurality of processing dies with respect to one multi-layer processing machine at low cost. For example, Patent Documents 3 to 5 disclose conventional techniques related to mold change of this multilayer processing machine.

Japanese Patent Laid-Open No. 2000-15496 JP 2012-51019 A JP 2009-56485 A JP 2011-156748 A JP 2011-218440 A

However, in the conventional techniques (for example, Patent Documents 3 to 5), it has not been possible to efficiently replace a plurality of processing dies at low cost.
Accordingly, an object of the present invention is to efficiently replace a plurality of processing dies of a multilayer processing machine at low cost.

As described in claim 1, the die change table of the present application is for exchanging a plurality of the processing dies of a multilayer processing machine that uses a plurality of processing dies for press working in a mold clamping / die opening direction. The mold change stand of
A mold holding part that can be simultaneously inserted into the multilayer processing machine and can hold the processing mold in the multilayer processing machine in a state of being inserted into the multilayer processing machine, It is provided side by side with a wider interval than the arrangement interval,
The mold holding unit may have a structure for regulating the working mold movement and fall in the lateral direction perpendicular to the insertion direction,
It is characterized in that a claw of a lift that moves on the floor on which the mold changing table is placed can be inserted at the bottom or below the mold changing table .

  Further, according to a preferred aspect of the mold exchanging table of the present application, as described in claim 2, the mold holding part restricts movement of the working mold held by the mold holding part to the front end side in the insertion direction. This is an aspect in which the drop-off preventing member is removable.

Moreover, the multilayer processing system of the present application is a multilayer processing system comprising the die change table according to any one of claims 1 to 2 and the multilayer processing machine as described in claim 3 .
The multilayer processing machine has a mold clamping regulation for preventing a mold clamping operation of the multilayer processing machine at a position where an arrangement interval of the plurality of processing molds attached to the multilayer processing machine coincides with an interval between the plurality of mold holding portions. The block is removable.

In addition, the mold changing method of the present application is as described in claim 4 ,
A mold exchange method of the multilayered processing machine using a mold exchange table according to any one of claims 1 to 2,
The plurality of processing molds attached to the multilayer processing machine are released from being fixed to the multilayer processing machine, and the plurality of processing molds attached to the multilayer processing machine are arranged at intervals of the plurality of mold holding portions. A first step of making the exchange position stop state in which the operation of the multilayer processing machine is stopped at a position matching the interval;
In the state where the exchange position is stopped, the empty mold exchanging table that does not hold the machining die is moved to insert the die holding portion into the multilayer processing machine, and the die in the multilayer processing machine is held in the mold. A second step of holding each by a part, and then moving the mold exchanging table to pull out the mold holding part together with the processing mold from the multilayer processing machine;
In the state where the exchange position is stopped, another mold exchanging table holding the new processing mold after exchange is moved, the mold holding section is inserted into the multilayer processing machine, and then the mold exchanging table is moved. A third step of pulling out the die holding part from the multilayer processing machine with the new processing die left in the multilayer processing machine;
And a fourth step of fixing the new processing die to the multilayer processing machine.

  According to the die change stand, the multi-layer machining system, and the die change method of the present application, it is possible to efficiently exchange a plurality of machining dies of a multi-layer machine at low cost.

It is a side view of a multilayer processing system including a multilayer processing machine and a mold change table. It is a top view of a multilayer processing system. It is a side view of a multilayer processing machine. It is a front view of a multilayer processing machine. (A) is an enlarged front view of the lower mold periphery of the multilayer processing machine, and (b) and (c) are diagrams for explaining the attachment of a safety block (clamping restriction block) of the multilayer processing machine. It is a side view of a type change stand. It is a front view of a type change stand. It is a perspective view of a type change stand. It is a perspective view of the type | mold exchange stand (state which removed the fall-off prevention member) mounted on the lift (hand pallet truck). (A) is a figure explaining removal of a drop-off prevention member, (b) is a figure explaining attachment of a drop-off prevention member. It is a perspective view of the type | mold exchange stand which mounted | wore with the type | mold (the state which carried on the lift, without the fall-off prevention member). It is a perspective view of the type | mold exchange stand (with drop-off prevention member) which mounts the type | mold. It is a figure which shows the type | mold exchange stand (without mounting | wearing of a type | mold) mounted on the lift, (a) is a front view, (b) is a side view. It is a figure which shows the type | mold exchange stand (with the mounting of a type | mold) mounted on the lift, (a) is a front view, (b) is a side view. It is a figure explaining the other structural example of the type | mold holding part (claw part) of a type | mold exchange stand.

Embodiment 1 of the present invention will be described below with reference to the drawings.
1 and 2 are a side view and a plan view showing the entire multilayer processing system. As shown in FIG. 1, the multilayer processing system includes a multilayer processing machine 1 and a mold changing table 50, and has a plurality of mold changing tables 50 for one multilayer processing machine 1. In addition, the multilayer processing system of this example includes a lift 200 (hand pallet truck) as means for moving (including raising and lowering) the mold change table 50.

First, the multilayer processing machine 1 will be described. As shown on the left side of FIG. 2, the multilayer processing machine 1 includes a workpiece pallet carry-in unit 2, a workpiece supply / unload unit 3, a workpiece pallet carry-out unit 4, a control unit 5, and a processing machine main body 10.
The work pallet carry-in part 2 is a part in which a work pallet loaded with a work (raw material or intermediate product) before processing is prepared and set in advance, and is set in the work pallet carry-in part 2 The workpiece pallet is then sent to the workpiece supply / unloading unit 3. The workpiece supply / unloading unit 3 supplies the workpiece loaded on the workpiece pallet sent from the workpiece pallet loading unit 2 to the processing machine body 10 and sets it, or after being processed by the processing machine body 10. The structure includes a mechanism including a hand (for example, a hand 3a shown in FIG. 3) for taking out a workpiece (processed product) from the processing machine body 10. The work pallet unloading unit 4 is configured to carry out an empty work pallet. In the case of this example, the workpiece pallet is configured to sequentially move in one direction from the workpiece pallet loading unit 2 to the workpiece supply / unloading unit 3 and then from the workpiece supply / unloading unit 3 to the workpiece pallet unloading unit 4. Yes. The control unit 5 is provided with a control device that controls the multilayer processing machine 1.

As shown in the side view of FIG. 3 and the front view of FIG. 4, the processing machine main body 10 is a multilayer in which a plurality of processing dies are arranged in the mold clamping / die opening direction (in this case, the vertical direction) and press working is performed. It is a main body of the processing machine 1. Since this example is a four-layer type, four sets of processing molds, that is, the processing mold K1, the processing mold K2, the processing mold K3, and the processing mold K4 can be mounted on each layer from the top. For convenience, in this example, the layer to which the processing die K1 is attached is the first layer, the layer to which the processing die K2 is attached is the second layer, the layer to which the processing die K3 is attached is the third layer, and the processing die K4 is attached. This layer is called the fourth layer. However, in the case of this example, the processing order of one specific workpiece (the flow of one specific workpiece) is as follows: first layer 4, then third layer, then second layer, and finally first layer. , In order from the bottom. That is, one workpiece taken out from the workpiece pallet in the workpiece supply / unloading unit 3 is set in the fourth layer in the first processing operation (operation in which the layers of the processing machine body unit 10 are collectively clamped). After being processed with the processing die K4, it is transferred from the fourth layer to the third layer and processed with the processing die K3 in the next processing operation, and similarly with the processing die K2 in the next processing operation, Similarly, in the next machining operation, machining is performed with the machining die K1, and when the machining operation with the machining die K1 is finished, the workpiece is taken out by the uppermost hand 3a (shown in FIG. 3) of the workpiece supply / unloading unit 3, 3a is reversed from the state shown in FIG. 3 and rotated backward (leftward in FIG. 3) to be discharged backward. As shown in FIG. 4, the processing mold K1 includes an upper mold U1 and a lower mold L1, and the workpiece is processed by an operation (clamping) between the upper mold U1 and the lower mold L1. Similarly, the processing mold K2 includes an upper mold U2 and a lower mold L2, the processing mold K3 includes an upper mold U3 and a lower mold L3, and the processing mold K4 includes an upper mold U4 and a lower mold L4.
In the present application, the operation of joining the upper mold and the lower mold to each other without a work is also referred to as “clamping”. In addition, the “clamping state” in the present application is a state of a multilayer processing machine, in which the movable member (slider / movable ram) of the multilayer processing machine is lowered until the upper mold and the lower mold of each processing mold are joined. It does not limit the presence or absence of the workpiece (whether or not the workpiece is set with respect to the machining die). That is, the “clamping state” in the present application may be a state in which the movable member of the multilayer processing machine is lowered until the upper die and the lower die of each machining die are joined with the workpiece sandwiched therebetween. In some cases, the movable member of the multilayer processing machine is lowered until the upper die and the lower die of each processing die are joined without a workpiece. Incidentally, since the position (bottom dead center) of the movable member of the multilayer processing machine 1 in this mold clamping state in the mold clamping and mold opening direction is substantially the same regardless of the presence or absence of the workpiece, There is no need to consider the presence or absence of such workpieces. In other words, the positional relationship in the mold clamping and mold opening direction of the movable member in the mold clamping state (and the arrangement interval of the processing molds in the mold clamping state) is slightly in the mold clamping state with and without the workpiece. May be different. However, since this difference is slight, with respect to the mold change of the present application, the interval LH between the mold holding portions 71 to 74 (to be described later) of the mold change table 50 is set to the processing mold arrangement interval LK2 (for example, no workpiece) in the mold clamping state to be described later If there is a large margin with respect to the value in the case of (1), it is not necessary to consider the presence or absence of a workpiece.

  The processing machine main body 10 includes a gantry 11 installed on the floor, a lower fixed platen 12 (bolster) provided on the bottom and fixed to the gantry 11, and provided on the top to the gantry 11. The upper fixed platen 13 to be fixed and the mold clamping / opening direction (in this case, the vertical direction) are arranged in the axial direction, the lower end portion is fixed to the lower fixed platen 12, and the upper end portion is attached to the upper fixed platen 13. Four fixed struts 14 (guide shafts), a slider 21 and three movable rams 22 to 24 which are movable members attached to the struts 14 so as to be movable up and down, and a hydraulic cylinder which is a press drive source 40.

  The support columns 14 are provided at four front and rear, left and right corner positions, and also function as guide shafts for guiding the slider 21 and the three movable rams 22 to 24 in the mold clamping and mold opening directions. In the case of this example, the slider 21 and the three movable rams 22 to 24 are attached so as to be movable in the axial direction (in this case, the vertical direction) with respect to the two struts 14 that are alternately positioned diagonally. The two struts are notched (not shown) so as not to contact each other. As shown in FIG. 4 (front view), for example, the slider 21 that is the uppermost movable member is placed on the left front column 14 and the right rear column 14 in the bearing portion 21a (two locations) as viewed from the front. It is attached so as to be movable, and is always separated from the left back column 14 and the right front column 14 when viewed from the front. The movable ram 22 positioned below the slider 21 is movably attached to the column 14 at the left back and the column 14 at the right front when viewed from the front in the bearing portion 22a (there are two locations). When viewed from above, the left front post 14 and the right back post 14 are always separated from each other. Similarly, the movable ram 23 positioned below the movable ram 22 is movably attached to the left front pillar 14 and the right rear pillar 14 when viewed from the front in the bearing portion 23a. The movable ram 24 positioned below is attached to the support column 14 at the back left side and the support column 14 at the right front side so as to be movable in the bearing portion 24a.

  In addition, each bearing part 21a-24a supports and guides each movable member with respect to the support | pillar 14 with an internal slide bearing (illustration omitted), for example, However, The system of a bearing is not restricted to a slide bearing. Needless to say, a rolling bearing may be used. In addition, each movable member (slider 21 and movable rams 22 to 24) may be guided by the four support columns 14, but as described above, each of the two support columns 14 that are alternately positioned on the diagonal line. By adopting a guided configuration (hereinafter referred to as a two-diagonal configuration), the following effects can be obtained. That is, it is possible to set the axial length of each bearing portion 21a to 24a to be significantly large, which makes it difficult for the slider 21 and the movable rams 22 to 24 to tilt with respect to the driving force of press working and to deform. It becomes difficult, and, for example, galling (a phenomenon in which movement of the sliding portion is locally disturbed) occurs in each of the bearing portions 21a to 24a due to the inclination and deformation caused by the driving force of the press working, and each movable member becomes An excellent effect is obtained in that the possibility of malfunctions such as the inability to move smoothly is greatly reduced. This is based on the physical characteristics that the long slide does not tilt more than the short length if the shaft and the bearing have the same play size in the diameter direction. In addition, with the above two-diagonal configuration, the number of bearing portions can be reduced to half, and the effect that the bearing portions of the movable members can easily be avoided in the mold clamping state can be obtained.

  The hydraulic cylinder 40 includes a cylinder rod 41 that moves forward and backward by hydraulic pressure with respect to the cylinder body. The cylinder body is fixed to the upper fixed platen 13, and the tip of the cylinder rod 41 is fixed to the slider 21. . Accordingly, the slider 21 moves integrally with the cylinder rod 41 and moves in the mold clamping / mold opening direction (in this case, the vertical direction). The press drive source is not limited to the hydraulic cylinder, and may be another configuration such as a ball screw.

  Here, each machining die is attached to any one of the slider 21, the three movable rams 22 to 24, and the lower fixed platen 12 (bolster) as shown in FIG. 4 by a predetermined fixing mechanism (not shown). Removably fixed. That is, the upper mold U1 is fixed to the lower surface of the slider 21, the lower mold L1 is fixed to the upper surface of the movable ram 22, the upper mold U2 is fixed to the lower surface of the movable ram 22, and the lower mold L2 is fixed to the upper surface of the movable ram 23. The upper mold U3 is fixed to the lower surface of the movable ram 23, the lower mold L3 is fixed to the upper surface of the movable ram 24, the upper mold U4 is fixed to the lower surface of the movable ram 24, and the lower mold L4 is fixed to the lower fixed platen 12. It is the structure fixed to the upper surface of.

  Moreover, each movable ram 22-24 is the structure suspended from the slider 21, so that the space | interval with the slider 21 may not become more than a setting amount at the time of a mold opening. That is, as shown in FIG. 3, the suspension column 25 is provided in the slider 21 and the movable rams 22 to 24 so as to penetrate in the mold clamping and mold opening directions. Although this suspension column 25 appears to be one in FIG. 3, it is actually provided in the same manner on the near side and the other side in FIG. 3, and there are a total of two in this example. Further, the penetrating portions of the suspension column 25 in the slider 21 and the movable rams 22 to 24 are U-shaped notches when viewed from above. A stopper 26 is fixed to the upper end of the suspension column 25. The stopper 26 can be bonded to the upper surface of the slider 21 and prevents the suspension column 25 from being lowered relative to the slider 21 when bonded to the upper surface of the slider 21. Further, a threaded portion (male screw) is formed on the outer periphery of the suspension column 25 (a range including a portion penetrating at least three movable rams 22 to 24). The distance adjusting nuts 27, 28, and 29 are attached by mutual thread portions (that is, by screwing the male screw on the outer periphery of the suspension column and the female screw on the nut side). The three spacing adjustment nuts 27, 28, and 29 are configured to be joined to the lower surfaces of the three movable rams 22 to 24 in the mold open state as shown in FIG. The distance between ˜24 and the slider 21 does not exceed the set amount.

  Note that the value (LK1) at the time of mold opening of the vertical arrangement interval LK (shown in FIG. 4) of each of the processing dies K1 to K4 in the multilayer processing machine 1 is set to the suspension column 25 by using the interval adjusting nuts 27, 28, and 29. On the other hand, it can be adjusted (that is, can be increased or decreased) for each layer by rotating up and down and changing the vertical position (the position in the mold clamping and mold opening directions). This adjustment is performed, for example, so that the interval between the molds of each layer is appropriate depending on the dimensions of the processing mold to be mounted.

  In addition, gaps S1 and S2 as shown in FIGS. 4 and 5A are respectively formed on the left and right sides of the lower surface side of the lower molds L1 to L4 of each processing die. The horizontal plate portions 92 and 82 of the claw portions 90 and 80 of the mold exchanging table 50 described later in S2 can be inserted from the front. FIG. 5A shows the first layer, but the same applies to the second to fourth layers.

  Further, as shown in FIG. 3, columnar block mounting portions 31, 32, 33, and 34 are integrally formed on the lower surface of each movable member (slider 21 and movable rams 22 to 24) so as to extend downward. ing. A safety block 35 (clamping restriction block) as shown in FIGS. 5B and 5C can be easily attached to and detached from the lower surfaces of these block mounting portions 31 to 34. In the case of this example, as shown in FIG. 5 (b), on the upper surface of the safety block 35, an engaging protrusion 36 having a head having an enlarged diameter at the tip is integrally formed in a protruding state. The lower end of each block mounting part 31-34 is extended downward by inserting the protrusion 36 into the engagement notch (code | symbol abbreviation) formed in each block mounting part 31-34 from the side surface, and making it engage. Thus, the safety block 35 can be attached to each of the block attachment portions 31 to 34, respectively.

  Here, the length L8 (shown in FIG. 5 (c)) of the block mounting portions 31 to 34 is the vertical dimension of each machining die in which the upper die and the lower die are joined (the direction of clamping and opening in the clamping state). Therefore, if the safety block 35 is removed, these block mounting portions 31 to 34 will interfere with the press working operation (particularly the mold clamping operation). There is nothing. Then, the overall length L9 (shown in FIG. 5C) in which the safety block 35 is attached to the block attaching portions 31 to 34 and joined is set to be larger than the vertical dimension of each processing die in the joined state. . And in the state which attached the safety block 35 to the block attachment parts 31-34, when the lower end surface of the safety block 35 contact | abuts to the upper surface of each movable ram 22-24 or the lower fixed platen 12 without gap (what is called a dong). The arrangement interval LK (shown in FIG. 4) of the plurality of processing dies K1 to K4 attached to the multilayer processing machine 1 is the interval LH (shown in FIG. 6) of a plurality of die holding portions 71 to 74 described later of the die changing table 50. ) So that the mold clamping operation of the multilayer processing machine 1 (that is, the downward movement of each movable member accompanying the downward movement of the cylinder rod 41) is prevented. L9) is set. Thereby, by attaching the safety block 35, it is possible to easily and safely set each machining die to a state where it can be easily replaced (a replacement position stop state described later). In the present application, all safety blocks use the same reference numeral 35 for convenience. However, the safety block having a different length for each layer is used, and an arrangement interval LK (= LH in an exchange position stop state described later) is used. ) May be different for each layer.

The multilayer processing machine 1 described above operates as follows.
First, in the mold open state as shown in FIGS. 3 and 4 (normally, the state where the cylinder rod 41 has moved to the uppermost position (top dead center)) The workpiece is mounted before machining. When the workpiece before processing is mounted, the slider 21 and the movable rams 22 to 24 are moved down together with the cylinder rod 41, the molds are clamped in each layer, and press processing is executed. At this time, the driving force (press pressure) of the hydraulic cylinder 40 is as follows: cylinder rod 41, slider 21, machining die K1, movable ram 22, machining die K2, movable ram 23, machining die K3, movable ram 24, machining die K4. In this order and received by the lower fixed platen 12. And, by such a driving force, when the upper mold and the lower mold of all the processing dies K1 to K4 from the first layer to the fourth layer are in a clamped state with the workpiece sandwiched therebetween, pressing of each layer (that is, The machining of a total of four workpieces performed by each of the machining dies K1 to K4 from the first layer to the fourth layer is completed at the same time.

Here, the press work in each layer may include various processes such as drilling, cutting, bending, and molding, and the content of the process may be different for each layer. After the processing is completed, the slider 21 and the movable rams 22 to 24 are raised together with the cylinder rod 41 to return to the mold open state.
Note that the dimension indicated by the symbol LK in FIG. 4 and FIG. 5C is the arrangement interval of the processing dies K1 to K4 mounted on the multilayer processing machine 1 as described above. This arrangement interval LK naturally changes due to the movement of the movable member (slider 21 and movable rams 22 to 24) accompanying the operation of the cylinder rod 41, and becomes the minimum value (LK2) in the mold clamping state. The arrangement interval LK in the mold opening state or the mold clamping state may be the same for each layer or may be different for each layer (for example, when the dimensions of each processing die are different). Use LK. The arrangement interval LK (= LK1) in the mold open state can be adjusted for each layer by the interval adjusting nuts 27, 28, and 29 described above.
In the present application, the arrangement interval LK (LK at the top dead center) in the mold open state is represented by LK1, and the arrangement interval LK (LK at the bottom dead center) in the mold clamping state is represented by LK2.
The replacement of the processing die will be described later.

Next, the mold changing table 50 will be described with reference to FIGS.
As shown in FIGS. 6 to 8, the mold exchanging table 50 is provided with a plurality of mold holding portions 71, 72, 73, 74 arranged in the vertical direction (longitudinal direction of columns 56, 57 described later) on the base body 51. Is. In this example, since the caster 150 (wheels) is provided at the four corners of the lower surface, the mold exchanging table 50 is a cart (mold exchanging cart) that can run on the floor surface by itself. ing. As will be described in detail later, the mold holding units 71, 72, 73, and 74 can be inserted into the multilayer processing machine 1 at the same time, and the processing molds K1 to K4 in the multilayer processing machine 1 are inserted into the multilayer processing machine 1 respectively. The molds of the multilayer processing machine 1 can be held in the vertical direction (the mold of the multilayer processing machine 1) at an interval LH (shown in FIG. 6) wider than the arrangement interval LK (= LK2) of the processing dies K1 to K4 in the mold clamping state of the multilayer processing machine 1. Are provided side by side in the direction corresponding to the clamping / opening direction). In the case of this example, since there are four mold holding portions (four stages), there are three intervals LH in the vertical direction, but these three intervals LH may be the same or different (each processing) For example, when the dimensions of the molds are different, the same symbol LH is used for each part.
In the case of the present embodiment, the relationship between the values of the processing mold arrangement interval LK (LK1 in the mold opening state, LK2 in the mold clamping state) and the interval LH is LK2 <LH <LK1 in each layer. As described above, the positional relationship between the mold clamping and mold opening directions of the movable member in the mold clamping state may slightly differ depending on the thickness of the workpiece, depending on whether the workpiece is present or not. In this case, the arrangement interval LK2 is different depending on whether or not the workpiece is present. However, since this difference is slight, the interval LH is increased with a margin with respect to the arrangement interval LK2 with respect to the mold change of the present application. There is no problem. In other words, if the interval LH is set larger than the value when the work is present in the arrangement interval LK2, it is possible to cope with both work and no work.

  As shown in FIG. 8, the base body 51 is made up of strip-like bottom plates 52, 53 that are arranged horizontally in front of the bottom and near the bottom as viewed from the front, and members (angles) having an L-shaped cross section. , 53 are arranged in the front-rear direction so as to connect to each other, and are fixed to the upper surfaces of the bottom plates 52, 53, and adjacent to the inner surfaces of the bottom frames 54, 55 on the upper surface of the bottom plate 52 at the bottom. Two support posts 56 and 57 provided so as to extend upward from the position, connecting portions 58 and 59 for connecting the support posts 56 and 57, and grips fixed to the upper rear side of the support posts 56 and 57, respectively. It has a portion 60 (a portion that can be grasped by hand) and leg portions 61 and 62 fixed so as to extend downward from both sides of the lower surfaces of the bottom plates 52 and 53.

Here, the caster 150 is fixed to the bottom surfaces of the left and right ends of the bottom plates 52 and 53 by screws or the like. The caster 150 may be configured to be detachable with respect to the bottom frames 54 and 55 (that is, with respect to the mold changing table 50) by attaching and detaching attachment screws.
In addition, the height L7 (shown in FIG. 6) of the bottom front protrusion including the casters 150, the bottom plate 53, the bottom frames 54, 55, and the like on the front side is fixed to the bottom of the multilayer processing machine 1 from the floor. The height LB (shown in FIG. 4) to the lower surface of the board 12 is sufficiently smaller than that when the mold holders 71 to 74 of the mold exchange table 50 are inserted into the multilayer processing machine 1 for mold exchange. The bottom front protrusion (the portion of height L7) is inserted into the space below the lower fixed platen 12 of the multilayer processing machine 1 (the space inside the gantry 11) so as not to interfere with the multilayer processing machine 1. Yes.

  Further, in the case of this example, the columns 56 and 57 are made of U-shaped members, and each member (the bottom plates 52 and 53, the bottom frames 54 and 55, the columns 56 and 57, the connecting portions 58 and 59, the gripping portion 60, the legs). The parts 61 and 62) are made of, for example, steel (other materials such as aluminum alloy), and the fixing between the members is performed by screwing, welding, riveting or the like. The detailed structure of the base body 51 is an example, and is not particularly limited. The plurality of mold holding parts 71 to 74 are supported on the multilayer processing machine 1 by supporting the plurality of mold holding parts 71 to 74. Any structure may be used as long as it can be inserted simultaneously.

However, as a further feature, the base body 51 of the mold changing table 50 of this example can insert the claw of the lift 200 that moves on the floor surface on which the base main body 51 is placed. The platform 50 is lifted, and the mold exchanging table 50 can be easily moved up and down, left and right, and back and forth by the lift 200.
The lift 200 may be, for example, a so-called commercially available forklift (for example, an electric type or an engine driven type) that is operated by a person, but in this example, a commercially available hand pallet truck (so-called manual type) is used. A forklift, also called a handlift or the like. The lift 200 (hand pallet truck) includes, as shown in FIGS. 1, 2, 13 and the like, a handle 201 for an operator to hold and operate, traveling wheels 202 and 203, and a so-called pallet ( 2 claws 204 that can be inserted into a thin hollow table on which a load is placed.

  A bottom space having a sufficient size into which the claw 204 of the lift 200 can be inserted is formed on the lower surface side (between the bottom plates 52 and 53 and the floor surface) of the base body 51 in the mold changer base 50 of this example. It becomes the composition which is done. The height of the bottom space is a height L6 (shown in FIG. 6) when the carriage 150 is attached to the caster 150, and a height L5 (shown in FIG. 6) when the caster 150 is removed and there is no wheel. It is. The height L5 is naturally smaller than the height L6, and is the vertical dimension of the leg portions 61 and 62. At least the two claws 204 of the lift 200 are inserted into the bottom space in the case of the height L6 (that is, the cart state) as shown in FIGS. 1 and 2 (or FIG. 9 to be described later). It is possible. In addition, it is preferable that the two claws 204 of the lift 200 can be inserted into the bottom space in the case of the height L5 (that is, in the state without the wheel). Can be easily moved by the lift 200.

Next, a detailed configuration of the mold holding units 71 to 74 will be described.
Each type | mold holding | maintenance part 71-74 has the structure which controls the motion and fall of each processing type | mold K1-K4 in the direction orthogonal to the insertion direction (the left-right direction in FIG.1, FIG.3, FIG.6) to the multilayer processing machine 1. FIG. Have. In the case of this example, each type | mold holding | maintenance part 71-74 is the movement of each process type K1-K4 in a horizontal direction (left-right direction in FIG. 4), and each process type K1-K4 by the nail | claw parts 80 and 90 mentioned later. It has a structure that regulates falling (downward movement in FIG. 4). In the case of this example, the upward movement in FIG. 4 of each processing mold K1 to K4 is configured to be regulated by gravity.

  When these mold holders 71 to 74 are inserted into the multi-layer processing machine 1, the mold holder 71 holds the machining die K1, the mold holder 72 holds the machining die K2, and the die holder 73 is the machining die K3. The mold holding unit 74 corresponds to each machining die in the arrangement order, such as holding the machining die K4. In addition, since the mold holding parts 71 to 74 have the same configuration in the present example except that the installation heights are different and the installation positions of the corresponding machining dies are different, the uppermost mold holding part 71. Only the detailed configuration will be described, and the other stages of the mold holding units 72, 73, and 74 will be denoted by the same reference numerals, and description thereof will be omitted (some reference numerals in the drawings are also omitted).

  The mold holding portion 71 is composed of a pair of claw portions 80 and 90 having L-shaped cross sections that can be joined to the bottom surface and side surface of the processing die (the processing die K1 in the case of the mold holding portion 71), as shown in FIG. Thus, each claw portion is located on both sides in the lateral direction of the processing die (processing die K1 in the case of the die holding portion 71) corresponding to the insertion into the multilayer processing machine 1, and one claw portion 80 is the processing die K1 (details). Is joined to the bottom surface and one side surface of the lower die L1), and the other claw portion 90 is joined to the bottom surface and the other side surface of the machining die K1 (specifically, the lower die L1). It is a structure that regulates directional movement and fall.

  Here, the claw portions 80 and 90 are made of a member formed by sheet metal processing (processing such as bending and cutting) of a plate material made of steel (or other material such as an aluminum alloy). Among these, the claw portion 80 has a vertical plate portion 81 arranged in the vertical direction and a horizontal plate portion 82 extending perpendicularly from the lower edge of the vertical plate portion 81 to the inner horizontal direction, as shown in FIG. The vertical plate portion 81 and the horizontal plate portion 82 form an L shape when viewed from the longitudinal direction (that is, the front direction of the mold changing table 50), and a cross-sectional shape cut along a plane orthogonal to the longitudinal direction is an L shape. It has become. As shown in FIGS. 6 and 8, the claw portion 80 has a horizontal direction (a direction parallel to the floor surface on which the mold changing table 50 is installed) and a front end side protruding from the column 56 to the front side. Thus, the column 56 is fixed. Specifically, the rear end portion 81a of the vertical plate portion 81 is joined to the outer surface of the support column 56 and fixed thereto by, for example, screws, and the mold changing table 50 is placed on a horizontal floor surface. In this case, the horizontal plate portion 82 is horizontal and the vertical plate portion 81 is in the vertical direction.

  Similarly, the claw portion 90 has a vertical plate portion 91 arranged in the vertical direction and a horizontal plate portion 92 extending perpendicularly from the lower edge of the vertical plate portion 91 to the inner horizontal direction. And the horizontal plate part 92 forms an L shape when viewed from the longitudinal direction, and a cross-sectional shape cut in a plane perpendicular to the longitudinal direction is an L shape. As shown in FIGS. 6 and 8, the claw portion 90 is fixed to the support column 57 in a posture in which the longitudinal direction is the horizontal direction and the front end side protrudes from the support column 57 to the front side. Specifically, the rear end portion 91 a of the vertical plate portion 91 is joined to the outer surface of the support column 57 and fixed to the support column 57 by, for example, screwing.

  In addition, when these nail | claw parts 80 and 90 are inserted in the multilayer processing machine 1 as shown with a half line in FIG. 1, as shown to Fig.5 (a), the vertical board part 81, the horizontal board part 82, and the vertical board The portion 91 and the horizontal plate portion 92 are respectively disposed on both sides of the processing die K1 (specifically, the lower die L1), and the horizontal plate portions 82 and 92 can be inserted into the gaps S1 and S2, respectively.

  Further, as shown in FIG. 6 and the like, the claw portions 80 and 90 of the respective mold holding parts 71 to 74 are parallel to each other so as to extend to the front side in the horizontal direction when the mold exchange table 50 is placed on a horizontal floor surface. Are arranged in a laminated manner and are substantially parallel to the bottom frames 54 and 55 described above, and the horizontal position is substantially the same as the bottom frames 54 and 55 described above. The caster 150 and the leg portions 61 and 62 described above are arranged at positions outside or at the end side of the claw portions 80 and 90 of the respective mold holding portions 71 to 74 in this horizontal direction. Even if the processing molds K1 to K4, which are heavy objects, are respectively held on the claw portions 80 and 90 of the portions 71 to 74, the mold changing table 50 can be stably prevented from falling on a horizontal floor surface. It can be placed on the floor and can stably travel (horizontal movement) by the action of the caster 150.

Further, the vertical plate portions 81 and 91 of the claw portions 80 and 90 are reduced in weight while ensuring necessary strength, and in order to ensure ease of insertion, as shown in FIG. It has a tapered shape (a shape in which the upper edge is cut obliquely) whose width becomes narrower toward it.
In addition, slits 83 and 93 (cuts) extending downward from the upper edge are formed at the front end portions (front end portions) of the vertical plate portions 81 and 91 of the claw portions 80 and 90, and both ends are inserted and removed here. Accordingly, the drop-off prevention member 100 (shown in FIG. 8 and the like) can be attached to and detached from the respective mold holding portions 71 to 74. The drop-off prevention member 100 is of a strip-like shape (for example, made of steel) as a whole, and bent portions 101 and 102 for preventing the drop-off are formed at both ends by bending both ends with respect to the longitudinal direction. As shown in FIG. 10 (b), the drop-off preventing member 100 is inserted into the slits 83 and 93 from above, and the mold holding portions 71 to 74 are inserted in the bent portions 101 and 102 to the outside. 10 and can be easily detached from the respective mold holding parts 71 to 74 by extracting both ends upward from the slits 83 and 93 as shown in FIG. And this drop-off prevention member 100 contacts the lower front end surface of the processing mold (specifically, the lower mold) held by each of the mold holding portions 71 to 74 in the mounted state, so that the held processing mold is inserted in the insertion direction. The movement to the front end side (the front end side of the claw portions 80 and 90) is restricted, thereby preventing the held processing mold from falling off from the front side.

  Further, as shown in FIGS. 8 and 9, etc., the base end side (rear end side) of the vertical plate portions 81 and 91 of the claw portions 80 and 90 protrudes inward along the horizontal plate portions 82 and 92. Further, rear stoppers 84 and 94 are attached. The rear stoppers 84 and 94 are cylindrical in the case of this example, and against the nuts 85 and 95 (shown in FIGS. 6 and 8) fixed to the outer side surfaces of the vertical plate portions 81 and 91. Thus, they are detachably attached by screwing with screws passing through the vertical plate portions 81 and 91, respectively. Here, through holes corresponding to the nuts 85, 95 for attaching the rear stoppers 84, 94 (through holes coaxial with the nuts 85, 95, not shown) are provided at a plurality of positions in the insertion direction (front-rear direction). (Two places in this example) are provided, and the positions of the rear stoppers 84 and 94 in the insertion direction (front-rear direction) can be changed according to the size of the machining die.

  The rear stoppers 84 and 94 come into contact with the lower rear surface of the processing mold (specifically, the lower mold) held by the respective mold holding portions 71 to 74, so that the held processing mold is rear end in the insertion direction. The movement to the side (rear end side of the claw portions 80 and 90) is restricted. Therefore, in the mold changing table 50 of this example, the processing mold held by each of the mold holding portions 71 to 74 is moved forward and backward, left, right, up and down by the claw portions 80 and 90, the drop-off prevention member 100, and the rear side stoppers 84 and 94. All movements are restricted and there is almost no displacement.

According to the mold changing table 50 described above, the working dies K1 to K4 can be exchanged efficiently at low cost by a method including the following first to fourth steps, for example. This die change may be performed in a state where no workpiece is set on the machining dies K1 to K4 or in a state where a workpiece is set on the machining dies K1 to K4. It can also be done. Actually, there may be a case where the work is performed with the work in place. For example, each processing mold is removed from the multilayer processing machine 1 with the work inserted and stored, and then when performing processing with the processing mold, each processing mold with the workpiece is attached to the multilayer processing machine 1 as it is, It is also possible to restart the operation of the multilayer processing machine 1 from the state where the workpiece is contained.
・ First step A
In the mold clamping state of the multilayer processing machine 1, the upper molds U1 to U4 of the upper molds U1 to U4 constituting the processing molds K1 to K4 attached to the multilayer processing machine 1 are released from being fixed to the multilayer processing machine 1. .
・ First step B
The operation of the multilayer processing machine 1 (the lifting and lowering operation of the cylinder rod 41) is performed at a position where the arrangement interval LK of the plurality of processing dies K1 to K4 attached to the multilayer processing machine 1 coincides with the distance LH of the plurality of mold holding parts 71 to 74, respectively. The moving position of the movable member such as the slider 21 accompanying the movement is stopped, and the fixing of the lower dies L1 to L4 to the multilayer processing machine 1 is released. This order may be either. In other words, the lower mold may be fixed after the replacement position is stopped, or in some cases, the replacement position may be stopped after the lower mold is released.
Further, here, the first step B and the first step A are combined to constitute the first step, but the detailed order of each operation in the first step is not limited to the order described above. . For example, the upper mold is released after the lower mold is fixed first in the mold clamped state (or the upper mold is released as the mold clamped state after the lower mold is fixed in the mold open state). Then, the order in which the replacement position is stopped may be used.

Second Step In the state where the exchange position is stopped, an empty mold exchanging table 50 that does not hold the machining die is moved, and the die holding portions 71 to 74 are inserted into the multilayer processing machine 1, respectively. The processing molds K1 to K4 are respectively held by the mold holding parts 71 to 74, and then the mold changing table 50 is moved so that the mold holding parts 71 to 74 are moved from the multilayer processing machine 1 together with the held processing molds K1 to K4. Pull out.
Third step In the state where the exchange position is stopped, another die exchange table 50 holding the new machining dies K1 to K4 after the exchange is moved, and the die holders 71 to 74 are inserted into the multilayer processing machine 1. Then, the mold exchanging table 50 is moved to draw out only the mold holding parts 71 to 74 from the multilayer processing machine 1 while leaving the new processing dies K1 to K4 in the multilayer processing machine 1.

-Fourth step A
Of the upper mold and the lower mold constituting the new machining molds K1 to K4, the lower molds L1 to L4 are fixed to the multilayer processing machine 1.
・ 4th process B
In the mold clamping state of the multilayer processing machine 1, the upper molds U1 to U4 constituting the new processing molds K1 to K4 are fixed to the multilayer processing machine 1.
Here, although the said 4th process B and the said 4th process A combine both and comprise a 4th process, the detailed order of each operation | movement in this 4th process is not limited to the order of the description mentioned above. For example, the order may be a mold clamping state, in which the upper mold is first fixed and then the lower mold is fixed.

Next, an example of a more specific procedure of mold change in the multilayer processing system of this example using the mold change table 50 will be described below.
The correspondence between this procedure and each of the aforementioned steps (first step to fourth step) is described in parentheses.
1. The slider 21 of the multilayer processing machine 1 is moved to the descending end and stopped as a mold clamping state (first step A).
2. The upper molds U1 to U4 are fixed to the multilayer processing machine 1 (first process A).

3. The slider 21 of the multilayer processing machine 1 is moved to the rising end and stopped (first process B). Thus, the upper molds U1 to U4 are cut off from the movable members of the multilayer processing machine 1 and placed on the lower molds L1 to L4, respectively, and the upper molds U1 to U4 and the slider of the multilayer processing machine 1 positioned above the upper molds U1 to U4. 21 or a gap is formed between the movable rams 22-24.
4). As shown on the right side of FIGS. 5B and 5C, the safety blocks 35 are respectively mounted at predetermined positions of the multilayer processing machine 1 (the lower surface side of the block mounting portions 31 to 34 described above) (first step B). ).

5. The slider 21 of the multi-layer machine 1 is lowered to lower each safety block 35 as indicated by an arrow in FIG. 5C, and spaces (gap) that are vacant above or below all the safety blocks 35 are filled. It is stopped in the state (shown on the left side in FIG. 5C) (first step B). As a result, when the slider 21 of the multilayer processing machine 1 is at the rising end (when the mold is opened), the dimension (LK1) that is open at each stage (each layer) changes for each layer due to the difference in the processing mold. Even if the setting is made, the slider 21 and the movable rams 22 to 24 of the multilayer processing machine 1 are respectively connected to the movable ram or bolster (lower fixed platen 12) immediately below via the block mounting portions 31 to 34 and the safety block 35. The positional relationship between the slide, the movable ram, and the bolster (that is, the arrangement interval LK described above) is in a predetermined state for mold replacement. Here, the predetermined state refers to a state in which the arrangement interval LH of the mold holding units 71 to 74 in the die changer 50 and the arrangement interval LK described above coincide with each other, that is, a state where LK = LH in each layer. This is the exchange position stop state.
6). The lower molds L1 to L4 are fixed to the multilayer processing machine 1 (first process B).

7). As shown in FIGS. 9 and 13, an empty mold exchanging table 50 that does not hold a working mold is placed on a claw 204 of a lift 200 (hand pallet truck) for preparation (second step). The dropout prevention member 100 is removed as shown in FIG.
8). The claw portions 80 and 90 of the respective mold holding portions of the prepared mold exchanging table 50 are set at the clearance heights between the respective lower molds of the multilayer processing machine 1 and the movable rams and bolsters (that is, the vertical positions of the aforementioned clearances S1 and S2). The height of the mold exchanging table 50 from the floor is adjusted by moving the claw 204 of the lift 200 up and down so that the L-shaped cross-section of the mold is matched (second step).

9. The lift 200 on which the mold changing table 50 is placed is moved horizontally in the insertion direction, and the claw portions 80 and 90 of the mold holding portions 71 to 74 of the mold changing table 50 are shown in a half line in FIG. 1 is inserted to the back (for example, until the rear stoppers 84 and 94 come into contact with the lower mold) (second step). In addition, in the half line of FIG. 1, although only one type | mold holding | maintenance part is shown in figure, the nail | claw parts 80 and 90 of the four type | mold holding | maintenance parts 71-74 are each inserted actually. At this time, the uppermost stage (first stage) mold holder 71 is inserted into the upper surface side of the uppermost movable ram 22, and the second stage mold holder 72 is inserted into the upper surface side of the second stage movable ram 23. The third-stage mold holding part 73 is inserted on the upper surface side of the third-stage movable ram 24, and the fourth-stage mold holding part 74 is inserted on the upper surface side of the bolster (lower fixed platen 12).
10. The claw 204 of the lift 200 is slightly raised from the movable ram side or the bolster side of the multi-layer processing machine 1 to the place where the lower molds L1 to L4 are transferred to the claw parts 80 and 90 of the mold changing table 50, and the claw part 80 , 90 lifts and holds the respective working dies K1 to K4 (second step).

11. The lift 200 on which the mold exchanging table 50 holding the processing dies K1 to K4 is pulled out from the side of the multilayer processing machine 1 (that is, moved in the direction opposite to the insertion direction) (second step). As a result, as shown in FIG. 11, all the processing dies K1 to K4 (the upper dies U1 to U4 are joined to the lower dies L1 to L4, respectively) are connected to the die holders 71 to 71 of the die changing table 50. It comes out in the state held by 74 respectively.
12 As shown in FIG. 14, the drop-off prevention member 100 is attached to the tip of each of the claw portions 80 and 90 of the die changing table 50 pulled out from the multilayer processing machine 1.
13. As shown in FIG. 12, the mold changing table 50 is lowered from the lift 200 (hand pallet truck). As a result, the processing dies K1 to K4 before the replacement are removed and are stored in a compact state (that is, with a small installation area) by the die replacement stand 50.

Next, when a new working die is mounted, if another die changing table 50 is brought as it is, the above-described 1. ~ 13. This can be done in reverse order of the procedure up to. This will be described below.
14 As shown in FIG. 11, another mold changing table 50 (hereinafter referred to as a new mold changing table 50) that holds the new processed mold on the claw 204 of the lift 200 (hand pallet truck). To prepare (third step). The dropout prevention member 100 is removed as shown in FIG.
15. The heights of the claw portions 80 and 90 of the respective mold holding portions of the new mold exchanging table 50 are matched with the height of the movable ram and bolster of the multi-layer processing machine 1 that remains in the exchange position stop state described above. Then, the claw 204 of the lift 200 is moved up and down to adjust the height of the new mold exchanging table 50 from the floor surface (third step). That is, the procedure 10 described above. Then, the height of the new mold changing table 50 is adjusted to the same height as the height after the claw 204 is slightly raised.

16. The lift 200 on which the new mold changing table 50 is placed is moved horizontally in the inserting direction, and the claw portions 80 and 90 of the mold holding parts 71 to 74 of the mold changing table 50 are inserted into the multilayer processing machine 1 to the back. (Third step).
17. The lower claws 204 of the lift 200 are slightly lowered until the lower molds L1 to L4 are transferred from the claw portions 80 and 90 of the new mold exchanging table 50 to the movable member side of the multilayer processing machine 1, and the claw portions 80, The respective processing dies K1 to K4 held by 90 are placed at predetermined positions on the movable ram bolster (third step).

18. With the new machining dies K1 to K4 left on the movable ram bolster, the lift 200 on which the new die changer 50 is placed is pulled out from the multi-layer machine 1 side (that is, moved in the direction opposite to the insertion direction). (Third step). As a result, as shown in FIG. 9, the new mold changing table 50 becomes an empty mold changing table 50 and comes out on the lift 200.
19. The lower dies L1 to L4 of the new processing dies K1 to K4 are fixed to the multilayer processing machine 1 (fourth process A).
20. After the slider 21 of the multi-layer machine 1 is once lifted and each safety block 35 is removed, the slider 21 is moved to the descending end and stopped as a mold-clamping state (fourth process B).
21. The upper dies U1 to U4 of the new processing dies K1 to K4 are fixed to the multilayer processing machine 1 (fourth process B). Thereafter, the slider 21 is moved to the rising end to return to the mold open state shown in FIG.

According to the embodiment described above, the following effects can be obtained.
(1) A plurality of individual processing molds can be exchanged all at once (simultaneously) by one die exchange table 50. That is, when exchanging a plurality of processing dies of the multilayer processing machine 1, an operation of taking out a plurality of processing dies before the replacement from the multilayer processing machine 1 is an operation of inserting a new processing dies after the replacement into the multilayer processing machine 1. In addition, it can be performed all at once by the plurality of mold holding portions 71 to 74 of the mold exchanging table 50, and the mold exchanging of the multilayer processing machine 1 can be performed by the exchanging method and procedure including the simple work as described above. For this reason, it is possible to greatly shorten the time required for the setup change in the press working operation.
(2) Compared to the mold changing method described later in (A) and (B), since it is not necessary to push and pull the processing die itself, which is a heavy object, over a long distance, Accident risk can be reduced.
(3) Since the safety block 35 (the mold clamping restriction block) that prevents the movable member of the multilayer processing machine 1 from descending in the exchange position stop state can be attached to and detached from the multilayer processing machine 1, this safety is ensured during mold replacement as described above. The procedure for mounting the block 35 simplifies the work of bringing the multi-layer machine 1 into the exchange position stop state for mold replacement, and an accident caused by inadvertent lowering of the slider / movable ram during mold replacement. Is prevented and safety is automatically secured.

(4) Since the important mechanical parts (slide, movable ram, etc.) of the multi-layer processing machine 1 can be left as they are, and only the content processing die that needs to be replaced can be replaced, it can greatly contribute to cost reduction.
(5) The mold changing table 50 also functions as a storage rack for loading a plurality of processing molds as it is, and the mold changing table 50 serves as both a mold changing jig and a storage facility. This eliminates the need to transfer equipment to the facility, reducing work time and risk of accidents.
(6) Since the mold exchanging table 50 also functions as a storage rack, it is not necessary to provide a separate storage facility such as a storage rack, and the facility cost can be reduced.

(7) Since the mechanism required for mold replacement is the mold replacement table 50 having a very simple structure, the risk of failure is low, the initial cost of the equipment can be reduced, and the maintenance cost can be greatly reduced.
(8) When the processing die is mounted on the die changing table 50, if the drop prevention member 100 is mounted on the die changing stand 50, each of the processing die is surrounded by each processing die. Since the mold does not move carelessly and does not drop during movement, safety is improved. In addition, since the above-described rear stoppers 84 and 94 are provided in the mold exchanging table 50 of the present example, the rearward movement of each processing mold is blocked by the rear stoppers 84 and 94, and the forward movement is prevented. Movement is blocked by the drop-off prevention member 100, movement in the left-right direction and dropping are blocked by the claw portions 80, 90, and upward movement is blocked by gravity.
(9) If a plurality of machining dies removed from the multilayer processing machine 1 by the mold exchange table 50 are directly mounted on the mold exchange table 50 and stored and managed, the multilayer processing machine 1 has a predetermined combination and a predetermined order (up and down arrangement). Multiple processing dies that should be mounted in order) are stored and managed as a set in the same order, so the risk of loss during storage is low, and the storage location can be easily moved and replaced, making storage management much easier It becomes easy and good.

As described above, according to this embodiment, it is possible to efficiently replace a plurality of processing dies of a multilayer processing machine at a low cost, and further ensure safety, facilitate storage management of processing dies, and equipment costs. In addition, the maintenance cost can be reduced.
Hereinafter, the above-described effects will be described in comparison with the conventional example for each inventive concept extracted from the above embodiment.

(Invention concept 1)
First, the mold changing table 50 of the above embodiment has the following characteristics.
That is, a mold exchanging table for exchanging a plurality of the processing dies of a multilayer processing machine that uses a plurality of processing dies for press working in the mold clamping / opening direction,
A mold holding part that can be simultaneously inserted into the multilayer processing machine and can hold the processing mold in the multilayer processing machine in a state of being inserted into the multilayer processing machine, It is provided side by side with a wider interval than the arrangement interval,
The mold holding portion has a structure that regulates movement and dropping of the processing mold in a lateral direction orthogonal to the insertion direction.

  According to the die change stand having this feature, each processing die in the multilayer processing machine is in a joined state (a state in which the upper die is joined and placed on the lower die), and each processing die is fixed to the multilayer processing machine. At the same time, the slider / movable ram of the multilayer processing machine is stopped at a position where the arrangement interval of each processing die coincides with the interval of the plurality of die holding parts of the die changing table (exchange position stop state). Insert multiple mold holders of the mold changer into the multi-layer machine at the same time, hold each processing mold, and then pull out the mold holder of the mold changer to remove the mold holder from the multi-layer machine. The work of taking out the machining dies can be performed all at once.

  The interval between the plurality of mold holding portions of the mold changing table is wider than the arrangement interval of the processing mold in the mold clamping state (that is, the arrangement interval of the slider, the movable ram, etc. in the mold clamping state). In the exchange position stop state, there is a gap between each machining die and the slider, movable ram, etc. immediately above it. Each die holding part has a structure that regulates lateral movement and dropping of each processing die. For this reason, after inserting each mold holding part of the mold changing table, it becomes possible to slightly raise each mold holding part of the mold changing table and lift each processing mold by each mold holding part. By lifting up, it is easy to transfer each processing die from the multilayer processing machine to each die holding portion of the die changing table and securely hold each machining die by each die holding portion.

  Further, according to the above-described die change stand, the multi-layer processing machine is set in the exchange position stop state, and in this state, a plurality of die holding portions of the die change stand on which the processing die after replacement is mounted is inserted into the multi-layer processing machine. After loading each processing die to the multi-layer processing machine side, the work of inserting the new processing die after replacement into the predetermined position of the multi-layer processing machine is easy by pulling out the mold holding part of the die change table. Can be done. At this time, the transfer of each processing mold to the multilayer processing machine side can be easily performed by the reverse operation to the above-described removal.

  Therefore, according to the above-mentioned type change stand, a plurality of processing dies of the multilayer processing machine can be exchanged efficiently and easily. In addition, as described in the effect of the above embodiment, since the machining mechanism can be replaced without changing the important mechanical parts of the multilayer processing machine, the cost can be greatly reduced. Therefore, it can be realized efficiently at a low cost and with a high level of safety.

On the other hand, a conventional example (or a comparative example) will be described. For example, the following methods (A) to (D) have been considered as mold changing methods for a multilayer processing machine.
(A) In a state where the slider / movable ram of the multilayer processing machine is moved to the top dead center, a rack having a plurality of shelves (die changing jig) is laid sideways on the multilayer processing machine, and each rack of each rack is Each processing die is transferred from the multi-layer processing machine to this rack by manually pushing each processing die that has been fixed and sliding to each layer while holding the upper surface at the same height as the lower surface of each processing die. Remove. Similarly, from a rack loaded with a new processing die to a multi-layer processing machine, the new processing die is manually pushed and slid to replace each layer, and then each processing die is fixed, thereby fixing each new processing die. Install the working mold.
(B) For each layer of the multi-layer processing machine, the work mold is manually pulled out to a dedicated rack or hand pallet truck, etc., and removed, and the work is pushed in reverse.

(C) For each layer of the multilayer processing machine, the upper mold and the lower mold are separated, and the upper mold and the lower mold are separately lifted and removed by a plurality of people, and attached in the reverse procedure.
(D) As described in Japanese Patent Application Laid-Open No. 2009-56485, the entire press assembly including a plurality of movable rams (support plates) and a plurality of working dies is replaced.
(E) As described in Japanese Patent Application Laid-Open No. 2011-156748, there is provided for each layer a slide table for moving a different working die at a position adjacent to each layer and a working die currently in use in the lateral direction. The working mold is exchanged for each layer by the operation of the slide table.
(F) As described in JP 2011-218440 A, a plurality of machining dies are exchanged for each die set including a movable member such as a slide and a plurality of machining dies.

However, in (A) and (B) of the above-described mold changing methods, an operation of pushing and pulling the processing die that is a heavy object over a long distance is required for each processing die (each layer). Since it is also necessary for the operator to put a hand into each layer in the multi-layer processing machine, there is a problem that workability is poor, a great amount of labor is required by the operator, and the risk of accidents increases. In particular, for machining dies at high positions, heavy workers must be pulled out and pushed in while being in an unstable posture at high altitudes. Since it is difficult to enter the reachable position, workability is very poor and accident risk is particularly high.
Also in (C), an operation of lifting the upper and lower molds, which are heavy objects, is required for each processing mold, and even in this operation, the operator needs to put his hands into each layer in the multilayer processing machine. After all, workability is poor, requiring a great deal of labor by the worker, and there is a problem that the risk of accidents also increases.

In (D) and (F), each processing die can be replaced at once, but even large and heavy mechanical parts of multilayer processing machines such as slides and movable rams that do not need to be replaced must be replaced. Therefore, there is a great deal of waste as equipment, and the mass of the part to be exchanged is large, and the exchange device becomes very large, so that there is a problem that the initial cost and running cost of the equipment become enormous.
In (E), a slide table must be provided for each layer, and a driving force for moving a high-mass slide table loaded with various types of processing dies for each layer is also required. In addition, there is a problem that the running cost becomes large.

  However, if the above-described mold change table of the present invention concept is used, the mold change table itself that also functions as a mold storage rack is moved, and a plurality of mold holding parts of the mold change table are simultaneously placed in the multilayer processing machine. By inserting into the multi-layer processing machine, it is not necessary for humans to insert hands into the multi-layer processing machine, and it is possible to carry out and put in and out each processing die for exchanging multiple processing dies at the same time. Can be exchanged. Further, since the mold changer has a configuration in which a plurality of mold holding units are arranged side by side, it can be realized at low cost. Therefore, if the above-described die change stand of the inventive concept is used, the conventional problems in the methods (A) to (D) described above can be solved.

(Invention concept 1a)
Moreover, the type | mold exchange stand 50 also has the following characteristics.
That is, the mold holding part is composed of a pair of claw parts having an L-shaped cross section that can be joined to the bottom surface and the side surface of the processing mold, and each claw is provided on both sides of the processing mold in the lateral direction when inserted into the multilayer processing machine. The claw portion is joined to the bottom surface and one side surface of the processing die, and the other claw portion is joined to the bottom surface and the other side surface of the processing die, so that the processing in the lateral direction is performed. It is a structure that regulates the movement and fall of the mold.

  A mold exchanging table having this feature can be used as long as the gaps S1 and S2 described above with reference to FIG. 5 (a) are provided on the lower surface of each processing mold in the multilayer processing machine. There is no need to provide the multi-layer processing machine, which is more advantageous in terms of cost.

(Invention concept 2)
Moreover, the type | mold exchange stand 50 also has the following characteristics.
That is, a drop-off preventing member that restricts movement of the working mold held by the mold holding part toward the distal end side in the insertion direction can be attached to and detached from the mold holding part.

  A mold change table with this feature is such that when a mold is mounted on the mold change table, each mold is surrounded by a drop-off prevention member attached to the mold change table. Since each processing mold does not move freely and does not fall when moving, safety is improved. Note that the rack used in the above-described methods (A) and (B) is a mere shelf-like shape and cannot prevent the processing mold from dropping from the front surface of the rack or the like.

(Invention concept 3)
Moreover, the type | mold exchange stand 50 also has the following characteristics.
That is, a lift claw that moves on the floor surface on which the mold changing table is placed can be inserted at the bottom or below the mold changing table.

  The mold changing table having this feature is such that, for example, a lift claw such as a commercially available hand pallet truck is inserted at the bottom or below, and the entire mold changing table is easily moved (lifted and moved horizontally) at low cost by the lift. be able to. As a result, the above-described mold exchanging work using the mold exchanging table is more workable, more cost-effective and more efficient.

(Invention concept 4)
In addition, the multilayer processing system including the multilayer processing machine 1 and the die changer 50 according to the embodiment has the following characteristics.
That is, a multi-layer machining system comprising the mold changing table according to any one of the inventive concepts 1 to 3 and a multi-layer machine,
The multilayer processing machine has a mold clamping regulation for preventing a mold clamping operation of the multilayer processing machine at a position where an arrangement interval of the plurality of processing molds attached to the multilayer processing machine coincides with an interval between the plurality of mold holding portions. The block is removable.

  The multi-layer processing system having this feature is a state in which the multi-layer processing machine is stopped for exchanging the mold as described above (a state in which the processing mold arrangement interval in the multi-layer processing machine matches the distance between the mold holding portions of the mold exchanging table). Work is simplified, and accidents caused by inadvertent lowering of the slider / movable ram at the time of mold change are prevented, and safety is automatically secured. For this reason, the mold change work using the mold change stand of the inventive concept 1 is safer, more workable, and more efficient. In the prior arts or comparative examples of (A) to (D) described above, there is no means for preventing the mold clamping operation (sliding of the slider / movable ram) at such a position suitable for mold replacement. In addition to workability, high safety cannot be realized.

(Invention concept 5)
In addition, the mold changing method of the multilayer processing machine 1 according to the embodiment has the following characteristics.
That is, a die change method for the multilayer processing machine using the die change stand according to any one of the inventive concepts 1 to 3,
The plurality of processing molds attached to the multilayer processing machine are released from being fixed to the multilayer processing machine, and the plurality of processing molds attached to the multilayer processing machine are arranged at intervals of the plurality of mold holding portions. A first step of making the exchange position stop state in which the operation of the multilayer processing machine is stopped at a position matching the interval;
In the state where the exchange position is stopped, the empty mold exchanging table that does not hold the machining die is moved to insert the die holding portion into the multilayer processing machine, and the die in the multilayer processing machine is held in the mold. A second step of holding each by a part, and then moving the mold exchanging table to pull out the mold holding part together with the processing mold from the multilayer processing machine;
In the state where the exchange position is stopped, another mold exchanging table holding the new processing mold after exchange is moved, the mold holding section is inserted into the multilayer processing machine, and then the mold exchanging table is moved. A third step of pulling out the die holding part from the multilayer processing machine with the new processing die left in the multilayer processing machine;
And a fourth step of fixing the new processing die to the multi-layer processing machine.

  Since the die change method of the multilayer processing machine having this feature uses the die change stand of the inventive concept 1, it is possible to realize the same effect as the effect of the inventive concept 1. In addition to this, the following operational effects are obtained. That is, in the second step and the third step, when inserting and pulling out only the mold holding part of the mold changing table, the fixing of each processing mold to the multi-layer processing machine is released. Can be easily inserted and pulled out. By the way, there is no problem in principle even in the procedure of inserting and pulling out only the mold holding part while each processing mold is fixed, but for example, the fixing mechanism becomes an obstacle and the work of inserting and pulling out the mold holding part There is a risk that workability will decrease. If it is the method of the said invention concept 5 or the invention concept 5a mentioned later, there is no fear of such a problem.

(Invention concept 5a)
In addition, the mold changing method of the multilayer processing machine 1 according to the embodiment has the following characteristics.
That is, a die change method for the multilayer processing machine using the die change stand according to any one of the inventive concepts 1 to 3,
A first step A for releasing the upper die from the upper die and the lower die constituting the working die attached to the multilayer processing machine in the mold clamping state of the multilayer processing machine; ,
In the exchange position stop state in which the operation of the multilayer processing machine is stopped at a position where the arrangement intervals of the plurality of processing dies attached to the multilayer processing machine coincide with the intervals of the plurality of mold holding portions, A first step B for releasing the fixation to the multilayer processing machine;
In the state where the exchange position is stopped, the empty mold exchanging table that does not hold the machining die is moved to insert the die holding portion into the multilayer processing machine, and the die in the multilayer processing machine is held in the mold. A second step of holding each by a part, and then moving the mold exchanging table to pull out the mold holding part together with the processing mold from the multilayer processing machine;
In the state where the exchange position is stopped, another mold exchanging table holding the new processing mold after exchange is moved, the mold holding section is inserted into the multilayer processing machine, and then the mold exchanging table is moved. A third step of pulling out the die holding part from the multilayer processing machine with the new processing die left in the multilayer processing machine;
Of the upper mold and the lower mold constituting the new processing mold, a fourth step A for fixing the lower mold to the multilayer processing machine;
And a fourth step B of fixing an upper die constituting the new processing die to the multi-layer processing machine in the mold clamping state of the multi-layer processing machine.

  Since the die change method of the multilayer processing machine having this feature uses the die change stand of the inventive concept 1, it is possible to realize the same effect as the effect of the inventive concept 1. In addition to this, the following operational effects are obtained. That is, since the upper mold is released from the first process in the clamping state, when the upper mold is released, the upper mold is already joined to the lower mold, and the upper mold is changed to the lower mold. On the other hand, there is no risk of falling and damaging, and the upper mold is placed on the lower mold simply by removing the upper mold, so the upper mold is placed on the lower mold for subsequent work. There is no need to bother the work of attaching and mounting to the camera. Further, in the second step and the third step, when only inserting and pulling out the mold holding part of the mold changing table, the fixing of each processing mold to the multilayer processing machine is released. Only the insertion and withdrawal operations can be easily performed.

(Invention concept A)
Moreover, the multilayer processing machine 1 of the said Example has the following characteristics.
That is, a multi-layer processing machine that uses a plurality of processing dies for press processing in the direction of mold clamping and mold opening,
A bolster (12) as a fixed plate;
Four struts (14) provided in a fixed state parallel to each other at the four corner positions with respect to the bolster;
Except for the mold (L4) fixed to the bolster among the molds (upper mold and lower mold) that are arranged in a plurality of layers in the mold clamping and mold opening directions so as to be operable with respect to these columns. A plurality of movable members ((slider 21 and movable rams 22 to 24)) that operably support a thing (U1, L1, U2, L2, U3, L3, U4);
A press drive source (hydraulic cylinder 40) for driving the movable member (slider 21) located on the opposite side farthest from the bolster among the plurality of movable members in a mold clamping and mold opening direction;
The plurality of movable members are configured to be guided by two bearing portions (21a to 24a) to two struts alternately positioned on the diagonal among the four struts (two diagonal configurations). It is characterized by.
In addition, the bearing which comprises the said bearing part is not specifically limited, For example, a slide bearing may be sufficient and a rolling bearing may be sufficient. The press drive source is not limited to a hydraulic cylinder.

  According to the multi-layer processing machine having this feature, as described above, the axial length of each bearing portion can be set to be remarkably large by the above-described two diagonal configuration. It is difficult to tilt with respect to the pressing force and difficult to deform, and the possibility of malfunctions such as each movable member not moving smoothly due to the tilt and deformation caused by the pressing force is greatly reduced. Excellent effect is obtained. In addition, with the above two-diagonal configuration, the number of bearing portions can be reduced to half, and the effect that the bearing portions of the movable members can easily be avoided in the mold clamping state can be obtained.

In addition, this invention is not restricted to the Example mentioned above, There can be various deformation | transformation and application.
For example, the configuration of the mold holding portion (claw portions 80 and 90) of the mold exchange table is not limited to the configuration of the above-described embodiment. FIG. 15A shows the configuration of the claw portions 80 and 90 of the above-described embodiment, but for example, the configuration shown in FIG. 15B or FIG. Here, the configuration shown in FIG. 15B shows a configuration example in which the claw portions 80 and 90 can be inserted into the grooves S3 and S4 when the grooves S3 and S4 are formed on the side surface of the processing die. ing. 15 (c) has a claw portion 80, which can be inserted into the grooves S5 and S6 inside the hook portions when reverse L-shaped hook portions are formed on the side surfaces of the processing mold. A configuration example of 90 is shown. Such a form may be sufficient as the structure of a type | mold holding | maintenance part (claw part 80,90). Therefore, the mold holding portions (claw portions 80 and 90) are not necessarily L-shaped in cross section, and the cross section may be linear as shown in FIG. 15C, or may be T-shaped in cross section. Alternatively, a circular cross-section (for example, a structure composed of a plurality of rod-shaped claws having a circular cross-section inserted into a plurality of holes in the insertion direction formed in the lower mold) may be used. In any case, the configuration of the plurality of mold holding portions (claw portions 80, 90) can be inserted into the multi-layer processing machine at the same time, and each processing die can be held by restricting the lateral movement and dropping of each processing die. A configuration that allows each type of processing to be transferred from the multi-layer processing machine to the die changing table, or from the die changing table to the multi-layer processing machine, for example, by lifting or lowering slightly while inserted in the processing machine. Any configuration may be used, and there may be a configuration including one claw portion instead of two, or a configuration including three or more claw portions.

  In the above embodiment, the vertical position adjustment at the time of inserting the mold holding part of the mold changing table is performed by a separate lift (hand pallet truck, etc.). For example, a lift-up mechanism is embedded in the ground below the multilayer processing machine. However, the vertical position adjustment of the mold holding portion may be relatively performed by using the lift-up mechanism to raise and lower the multilayer processing machine. In addition, the mold changing table itself is provided with a mechanism for raising and lowering the mold holding parts all at once (for example, a mechanism for raising and lowering the mold holding parts when an operator turns the handle). Position adjustment may be performed. In this case, when the caster (wheel) is attached to the mold change table as in the above embodiment, the horizontal movement of the mold change table itself and the lifting operation of the mold holding part can be performed only by the mold change table (or by the lift-up mechanism). ) Since it can be easily performed, it is not necessary to separately prepare a lift such as a hand pallet truck.

Moreover, although the type | mold exchange stand may be a trolley | bogie with a caster (wheel), the structure without a caster may be sufficient. Even if there is no caster, for example, if a lift claw can be inserted, the lift can be easily moved.
Moreover, the structure of the multilayer processing machine of the said Example is an example as mentioned above, and is not limited to this. For example, there may be a mode in which a press drive source such as a hydraulic cylinder is disposed below the machining die, the slider, or the movable ram. When the press drive source is disposed on the lower side, the operation of the press drive source pushing up the slider or the like to raise it is the mold clamping operation. Moreover, the mold clamping / mold opening direction is not necessarily limited to the vertical direction (vertical direction). For example, there may be an aspect that is slightly inclined with respect to the vertical direction. The multilayer processing machine is not limited to the four-layer type, and the number of stages (number of layers) may be less than 4 or 5 or more.
Moreover, the mold change by the mold change stand of the present invention can be performed, for example, in the mold open state of the multilayer processing machine without using the safety block 35 (the mold clamping restriction block) described above. LH = LK1. However, as described above, the aspect using the safety block 35 described above is excellent.

1 Multi-layer machine 12 Lower fixed platen (bolster)
14 Prop 21 Slider (movable member)
22-24 Movable ram (movable member)
21a-24a Bearing part 31-34 Block attachment part 35 Safety block (Clamping restriction block)
40 Hydraulic cylinder (press drive source)
50 type exchange base 71-74 type holding part 80,90 claw part 84,94 rear side stopper 100 drop-off prevention member 200 lift (hand pallet truck)
204 Lifting Claws K1 to K4 Processing Die U1 to U4 Upper Die L1 to L4 Lower Die

Claims (4)

A mold exchanging table for exchanging a plurality of the processing dies of a multilayer processing machine that uses a plurality of processing dies for press working in a mold clamping / opening direction,
A mold holding part that can be simultaneously inserted into the multilayer processing machine and can hold the processing mold in the multilayer processing machine in a state of being inserted into the multilayer processing machine, It is provided side by side with a wider interval than the arrangement interval,
The mold holding unit may have a structure for regulating the working mold movement and fall in the lateral direction perpendicular to the insertion direction,
A mold exchanging table characterized in that a lift claw that moves on the floor on which the mold exchanging table is placed can be inserted at the bottom or below the mold exchanging table.   The drop-off prevention member for restricting the working die held by the die holding portion from moving toward the distal end side in the insertion direction is detachable from the die holding portion. Mold change stand. A multilayer processing system comprising a said multilayer machine the type switchboard according to any one of claims 1 to 2,
The multilayer processing machine has a mold clamping regulation for preventing a mold clamping operation of the multilayer processing machine at a position where an arrangement interval of the plurality of processing molds attached to the multilayer processing machine coincides with an interval between the plurality of mold holding portions. A multilayer processing system characterized in that the block is removable. A mold exchange method of the multilayered processing machine using a mold exchange table according to any one of claims 1 to 2,
The plurality of processing molds attached to the multilayer processing machine are released from being fixed to the multilayer processing machine, and the plurality of processing molds attached to the multilayer processing machine are arranged at intervals of the plurality of mold holding portions. A first step of making the exchange position stop state in which the operation of the multilayer processing machine is stopped at a position matching the interval;
In the state where the exchange position is stopped, the empty mold exchanging table that does not hold the machining die is moved to insert the die holding portion into the multilayer processing machine, and the die in the multilayer processing machine is held in the mold. A second step of holding each by a part, and then moving the mold exchanging table to pull out the mold holding part together with the processing mold from the multilayer processing machine;
In the state where the exchange position is stopped, another mold exchanging table holding the new processing mold after exchange is moved, the mold holding section is inserted into the multilayer processing machine, and then the mold exchanging table is moved. A third step of pulling out the die holding part from the multilayer processing machine with the new processing die left in the multilayer processing machine;
And a fourth step of fixing the new processing die to the multi-layer processing machine.

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