JP2010042426A - Slide structure of press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slide structure of a press, capable of equalizing the forming pressure, generated between upper and lower dies, with a simple structure without requiring raised rigidity of a bolster and a bed, even if the bolster is concavely and convexly deformed. <P>SOLUTION: The slide structure of the press is used for press-forming a work 1 between a lower die and an upper die, and includes: a bolster 5, to the upper surface of which a lower die 2 is fixed; a slide 6, to the lower surface of which an upper die 3 is fixed; and a plurality of pressing parts 7, which are positioned higher than the slide and move vertically in synchronization with each other. Each of the pressing parts 7 is provided with a connection mechanism 10 for transmitting pressing force to the slide; each of the connection mechanisms is provided with a plurality of connection parts 10a, which is guided so as to push and pull the slide; each of the connection parts is connected with the slide at the positions spaced mutually in the horizontal direction; the pressing force is divided into components of the pressing force via the connection mechanisms and transmitted to each of the connection parts; and each of the connection parts pushes and pulls the slide until each of the components of the pressing force reaches a predetermined balance. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a press machine, and more particularly to a slide structure of a press machine.

The press machine moves the slide with the upper mold fixed up and down against the bolster with the lower mold fixed, and forms the workpiece (thin plate, etc.) between the lower mold and the upper mold. Device.
Since the reaction force of the processing force generated between the molds acts on the bolster and the slide during the forming process, there is a problem that the processing force tends to be uneven due to the deformation of the bolster and the slide.
Therefore, for example, Patent Documents 1 to 4 have already been proposed in order to make the machining force acting on the workpiece uniform.

The “working press device” of Patent Document 1 aims at extending the life of a mold and performing high-precision machining of a workpiece.
For this reason, as shown in FIG. 11, this working press apparatus has an upper mold, a lower mold disposed opposite to the upper mold, and a lower mold for the upper mold by vertical movement. An adapter that is provided between the press shank 50 for performing mold opening and clamping, and between the upper die and the press shank 50, has a gap portion 53, and transmits the load from the press shank 50 to the upper die through the foot portion 52. The adapter plate 51 is provided with a plate 51, and the adapter plate 51 is squeezed and deformed by a load from the press shank 50.

The “pressure device” of Patent Document 2 is intended to apply a uniform pressure to the surface of the object to be pressed that is to be pressed.
For this reason, as shown in FIG. 12, this pressurizing apparatus is connected to the first wafer 64 that is a pressurizing object of the pressurizing head 60 that is point-pressed on the pressurizing axis A from the pressurizing mechanism 68. A stress distribution plate 62 in which contact portions 66 and 67 are formed is disposed at a position that does not directly contact the object to be pressed. The applied pressure applied to the pressure axis A is dispersed by the space formed by the convex portions formed as the contact portions 66 and 67 on the stress dispersion plate 62, and the first wafer 64 is applied to the second wafer 65. It is applied as a uniform applied pressure to the pressing surface in contact.

The “mechanical press device for processing a long object” of Patent Document 3 aims to deform the slide in the same tendency following the distortion of the bed during press processing.
For this reason, as shown in FIG. 13, this mechanical press apparatus is provided with a point mechanism P that generates pressure in the hydraulic chamber 70 via the ram 71 by a press load at each point A, B, C, D of the slide 72. At the same time, a cushion mechanism Q is provided on the slide 72 by the hydraulic pressure of the hydraulic chamber 70 and compresses the air in the cylinder 73 by the piston 74. In this figure, 77 is a mold and 79 is a bed.

The “die mounting position correcting device for press machine” disclosed in Patent Document 4 aims to easily correct the displacement of the die mounting position accompanying the deformation of the press machine without forcing the operator to perform complicated operations. .
For this reason, as shown in FIG. 14, the correction device 80 includes a plurality of die holder blocks 81 provided so as to be movable in a direction protruding / embedding with respect to the mold mounting surface of the mold support. And a driving means 82 for individually moving the die holder blocks in the direction of projecting / embedding with respect to the mold mounting surface. In this figure, reference numeral 83 denotes a slide.

Japanese Patent Application Laid-Open No. 8-90081, “Processing Press Device and Processing Press Method” JP 2007-301593 A, “Pressurizer” Japanese Examined Patent Publication No. 59-32240, “Mechanical press device for processing long objects” Japanese Patent Application Laid-Open No. 2005-118854, “Die mounting position correction device for press machine”

  FIG. 1 is an operation explanatory diagram of a conventional press machine. In this figure, (A) is the state before molding, (B) is the molding state when the slide and the bolster are not deformed, (C) is the deformed state of the bolster, (D) is the deformed state of the slide, and (E) is The molding state when the slide and the bolster are deformed is shown.

In FIG. 1A, 1 is a work, 2 is a lower mold, 3 is an upper mold, 4 is a bed, 5 is a bolster, 6 is a slide, and 7 is a pressing portion.
The bolster 5 is usually supported by the bed 4 at its edge. The slide 6 moves up and down while being always parallel to the bolster 5. The pressing unit 7 is driven up and down by a driving mechanism (not shown).
In this invention, the case where the pressing part 7 is plural (2 points or more) is assumed. In this case, the plurality of pressing portions 7 move up and down in synchronization with the drive mechanism.

The slide 6 is an integral frame that has a function of bringing the upper mold 3 into close contact with the lower mold 2 and pressing it.
Further, the slide 6 is connected to a drive mechanism by a plurality of pressing portions 7 (for example, four symmetrical in the front-rear and left-right directions), and a force serving as a press load is transmitted. Therefore, a press load is transmitted from the lower surface of the slide to the upper mold 3 as a distributed load having an arbitrary range and size.
Further, a force is transmitted to the position away from the pressing portion 7 in the front / rear and left / right directions by the rigidity of the slide 6.

  In FIG. 1B, if the slide and the bolster have high rigidity and can be regarded as a perfect rigid body, the upper and lower molds 3 and 2 are completely brought into close contact with each other, and the entire surface of the work 1 is completely formed.

  But in reality, bolsters are not perfect rigid bodies. Therefore, for example, as shown in FIG. 1C, when both ends of the bolster 5 are supported by the bed 4, the central portion of the bolster bends downward. Therefore, the center part of the lower mold 2 supported by the bolster 5 also falls downward.

  On the other hand, since the slide 6 is supported by the pressing portion 7 at two points (or more), as shown in FIG. 1 (D), the central portion of the slide 6 is bent upward. Therefore, the center part of the upper mold 3 supported by the slide 6 also escapes upward.

  As a result, as shown in FIG. 1 (E), the close contact between the center portions of the upper and lower molds 3 and 2 becomes insufficient, causing a problem that the workpiece 1 is not completely formed.

That is, since the outer periphery of the support portion of the lower mold 2 is generally supported, the center portion is deformed downward by a press load. On the other hand, since the slide 6 is sheared due to the press load, the upper surface of the slide lower surface tends to be more deformed upward than the vicinity of the pressing portion 7.
As a result, the center of the slide and the center of the bolster are deformed in opposite directions, and the upper die 3 tends to be insufficiently pressed against the lower die 2 in the center of the work.
In order to solve such problems, measures to increase the rigidity of bolsters, beds, etc. can be considered, but there is a limit to improving the adhesion between the dies 3 and 2 by increasing the rigidity, and the problem can be improved and solved. Even so, the increase in size and weight due to the increase in rigidity, and the accompanying cost increase, were problems.

The means of Patent Documents 1 and 2 are based on the premise that the lower mold support corresponding to the bolster remains flat without being deformed. For this reason, even when the bolster is deformed into a concavo-convex shape, the structure is not such that a uniform molding pressure can be obtained.
The means of Patent Document 3 requires a pressing portion and a drive mechanism as many as the number of places that support the slide, so that there is a problem that the mechanism becomes complicated and the number of parts increases, resulting in an increase in cost.
Similarly, the means of Patent Document 4 has a problem that the mechanism is complicated and the number of parts is increased, resulting in an increase in cost.

The present invention has been developed to solve the above-described problems.
That is, the object of the present invention is to equalize the molding pressure between the upper and lower molds with a simple structure without increasing the rigidity of the bolster or the bed even when the bolster is deformed into irregularities. It is to provide a slide structure of a press machine.

According to the present invention, a bolster in which the lower mold is fixed to the upper surface, a slide in which the upper mold is fixed to the lower surface, and a plurality of pressing portions that are located above the slide and move up and down in synchronization with each other. A slide structure of a press machine that press-molds a workpiece between a lower mold and an upper mold,
Each pressing part has a coupling mechanism that transmits the pressing force to the slide,
Each coupling mechanism includes a plurality of coupling parts guided so as to push and pull the slide,
Each connecting portion is connected to the slide at a position spaced apart from each other in the horizontal direction,
The pressing force is divided into pressing component forces via a connecting mechanism and transmitted to each connecting portion.
A slide structure of a press machine is provided, wherein each connecting portion pushes and pulls the slide until each pressing component reaches a predetermined balance.

  According to a preferred embodiment of the present invention, the connection mechanism comprises one or a plurality of stacked seesaw mechanisms.

  The seesaw mechanism includes a seesaw member having both ends connected to a slide and swinging following the deformation of the slide, and an intermediate part of the seesaw member swingably supported, and a pressing force from a pressing part is intermediate. And a swinging member that transmits to the part.

  The connecting mechanism is structured such that at least both ends are connected to the slide and swings following the deformation of the slide, and the intermediate part of the structural member and the pressing part are swingably connected so that pressing from the pressing part It consists of a rocking member that transmits force to the intermediate part.

  According to another preferred embodiment, the seesaw mechanism includes a force transmission member having both ends connected to the slide and transmitting a pressing force from the pressing portion to the intermediate portion, and the force transmission member is used to deform the slide. Follow and deform.

  According to still another preferred embodiment, the connection mechanism includes a cylinder in which a fluid is sealed and receiving a pressing force from the pressing portion, and a plurality of lower end portions connected to the slide and moving up and down by the pressure of the fluid. It consists of a piston.

  The entire slide or one or more locations of the slide are set to have low rigidity so that the slide can be deformed following the deformation of the bolster by the pressing component force.

  In the slide, one or more portions between the pressing portions are set to have low rigidity so that the slide can be deformed following the deformation of the bolster.

Further, according to the present invention, the bolster in which the lower mold is fixed to the upper surface, the slide in which the upper mold is fixed to the lower surface, and the plurality of pressing members that are positioned above the slide and move up and down in synchronization with each other A slide structure of a press machine that press-molds a workpiece between a lower mold and an upper mold,
A swing member that supports the slide so as to be swingable and transmits a pressing force from a pressing portion to the slide,
The slide includes a low-rigidity part in which one or more points between the pressing parts are set to low rigidity so that the slide can be deformed following the deformation of the bolster,
There is provided a slide structure for a press machine, wherein the slide swings until the left and right structures reach a predetermined balance with the low-rigidity portion as a boundary and closely contacts the bolster.

  The slide has a switching mechanism capable of switching between a case where the rigidity of the low-rigidity portion is lower than that of other parts of the slide and a case where the rigidity is equal to the other.

  The swing member is preferably a flexible body or a rotatable member.

  The point of the present invention is that the number of locations where the slide is supported is more than doubled compared to the case where the slide is directly supported by the pressing portion by the connecting portion and the connecting mechanism for passively pushing and pulling the slide ( Means 1) and making the slide low-rigidity or providing a low-rigidity portion on a part of the slide (means 2) is to deform the slide so as to be adapted to the deformation of the bolster.

That is, according to the configuration of the present invention, each of the plurality of pressing portions that move up and down in synchronization with each other includes a connection mechanism that transmits a pressing force to the slide, and each connection mechanism is guided so as to be able to push and pull the slide. Provided with a plurality of connecting portions, each connecting portion is connected to the slide at a position spaced apart from each other in the horizontal direction, the pressing force is divided into pressing component forces via the connecting mechanism, and transmitted to each connecting portion, Each connecting part pushes and pulls the slide until each pressing component reaches a predetermined balance.
For example, even if the center of the bolster is deformed downward because the bolster is supported at both ends by the bed, the molding pressure between the upper and lower molds is changed while the center of the slide is deformed downward following this. Can be equalized.

Further, the slide can be easily deformed following the bolster by setting the slide to a low rigidity that can be deformed downward following the deformation of the bolster.
Therefore, for example, even when the center of the bolster is deformed downward because the bolster is supported at both ends by the bed, the molding between the upper and lower molds is performed while the center of the slide is deformed downward following this. The pressure can be equalized.

  Further, by forming the coupling mechanism as one or a plurality of stacked seesaw mechanisms, the molding pressure between the upper and lower molds can be equalized with a simple structure.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.

FIG. 2 is a first embodiment of the slide structure of the present invention. In this figure, (A) is a state before molding, (B) is a molding state when the slide and the bolster are deformed, and (C) is a modification thereof.
In FIG. 2A, 1 is a workpiece, 2 is a lower mold, 3 is an upper mold, 4 is a bed, 5 is a bolster, 6 is a slide, and 7 is a pressing portion. These are the conventional presses of FIG. It is the same as the machine.

The lower mold 2 is fixed to the upper surface of the bolster 5. The upper mold 3 is fixed to the lower surface of the slide 6.
The bolster 5 is supported at its edge by the bed 4, and the slide 6 moves up and down while being always parallel to the bolster 5. The pressing unit 7 is driven up and down by a driving mechanism (not shown).
Although two pressing parts 7 are shown on the left and right sides in this figure, the number of pressing parts 7 including the front and rear parts may be four or more. The plurality of pressing portions 7 move up and down in synchronization with a driving mechanism (not shown).
With this configuration, the press machine press-molds the workpiece 1 between the lower mold 2 and the upper mold 3.

2A, the slide structure of the present invention includes a plurality of connecting mechanisms 10 that connect the pressing portions 7 to the slide 6.
As shown in FIG. 2 (B), each coupling mechanism 10 divides the pressing force F of each pressing portion 7 into a plurality of pressing component forces f spaced apart in the horizontal direction following the deformation of the slide 6. Then, it is transmitted to the slide 6.

Here, the “plurality of divisions” may be extended in two horizontal directions, or may be divided into three. FIG. 7 shows an example of expansion in two horizontal directions.
Further, “following the deformation of the slide 6” means that each pressing portion 7 includes a coupling mechanism 10 that transmits a pressing force to the slide 6, and each coupling mechanism 10 is guided to be able to push and pull the slide 7. A plurality of connecting portions 10a are provided, and each connecting portion 10a is connected to the slide 6 at a position spaced apart from each other in the horizontal direction, and the pressing force is divided into pressing component forces via the connecting mechanism 10, and each connecting portion. 10a means that each connecting portion 10a pushes and pulls the slide 6 until each pressing component reaches a predetermined balance.
Here, “reaching balance” means that, as shown in FIG. 8, the seesaw mechanism type determines the pressing force from the balance between force and moment, and the fluid-sealed type determines the pressing amount from the balance between force and fluid pressure. It means that power is determined.
Further, the “pressing component force” is not limited to the same, and may be divided by being inclined and distributed.

  Further, the connecting mechanism 10 is connected so as to follow and raise the slide 6 when the pressing portions 7 are raised synchronously. This connection structure can be easily achieved by a well-known structure such as a pin, a flange, or a flange. In addition, in the following description, the connection structure at the time of this rise is abbreviate | omitted.

Preferably, the slide 6 is set to have a low rigidity so that the center portion can be deformed downward following the deformation of the bolster 5.
Alternatively, as shown in FIG. 9 to be described later, the entire slide or one or more locations may be set to have low rigidity so that the slide 6 can be deformed by pressing component force following the deformation of the bolster 5.

In this example, the connecting mechanism 10 includes one seesaw mechanism 11. The seesaw mechanism 11 includes a seesaw member 11a and a swing member 11b.
Both ends of the seesaw member 11a are connected to the slide 6 via the fixing member 11c, and swing according to the deformation of the slide 6. The swing member 11b supports the intermediate portion of the seesaw member 11a so as to be swingable, and transmits the pressing force F from the pressing portion 7 to the intermediate portion of the seesaw member 11a. The fixing member 11c may be integrated with the swinging member 11b or the slide 6.

  In this example, the oscillating member 11b is a flexible body that can support the pressing force F, and at least the lower surface can be inclined by the pressing force F. This flexible body can be constituted by, for example, a laminated metal plate, a disc spring, a metal with low rigidity (for example, aluminum), a cylindrical member having a small diameter and having a high degree of bending.

  With the above-described configuration, as shown in FIG. 2B, the pressing force F of each pressing portion 7 follows the deformation of the slide 6 and is divided and transmitted to a pair of the same pressing component force f. Therefore, even when the center of the bolster 5 is deformed downward, the molding pressure between the upper and lower molds 2 and 3 can be equalized while following the change and deforming the center of the slide 6 downward. it can.

  In other words, the flexible body 11b is provided below the pressing portion 7 of the pressing load F, and the load F acting on the pressing portion 7 is distributed almost evenly to both ends of the seesaw member 11a. Evenly approaching, the mold can be adhered evenly.

  In this case, the slide 6 is positioned between the pressing portions because the entire slide or one or more locations are set to low rigidity so that the slide 6 can be deformed following the deformation of the bolster. If the low-rigidity portion can be regarded as two structures at the boundary and they are considered to move rigidly, the low-rigidity portion is bent by the press load, so that the seesaw mechanism 11 is inclined so that, for example, the central portion is lowered.

  In this figure, there are two pressing portions 7 on the left and right, but as shown in FIG. 7, the same applies to the case where there are four pressing portions 7 including the front and rear.

  FIG. 2C is a modification of FIG. As shown in this figure, the seesaw mechanism 11 described above is not limited to one stage, but may be composed of a plurality of stages in which the seesaw mechanisms 11 are stacked.

  FIG. 3 is a second embodiment of the slide structure of the present invention. In this figure, (A) is a state before molding, (B) is a molding state when the slide and the bolster are deformed, and (C) is a modification thereof.

In this example, the connecting mechanism 10 is composed of one seesaw mechanism 12. The seesaw mechanism 12 includes a seesaw member 12a and a swing member 12b.
Both ends of the seesaw member 12a are connected to the slide 6 via the fixing member 12c, and swing according to the deformation of the slide 6. The swing member 12b supports the intermediate portion of the seesaw member 12a so as to be swingable, and transmits the pressing force F from the pressing portion 7 to the intermediate portion of the seesaw member 12a. The fixing member 12c may be integrated with the swing member 12b or the slide 6.
Here, the “intermediate portion” is not limited to a uniform center, and includes a case where the pressure component can be distributed in an inclined manner.

In this example, the swinging member 12b is a rotatable member that can support the pressing force F and that can rotate at least the lower surface by the pressing force F. This rotatable member is, for example, a pin or a spherical joint provided rotatably at the lower portion of the pressing portion 7.
Other configurations are the same as those of the first embodiment shown in FIG.

  With this configuration, as shown in FIG. 3 (B), the load F acting on the pressing portion 7 is distributed almost evenly to both end portions of the seesaw member 12a. The mold can be adhered evenly.

  FIG. 3C is a modification of FIG. As shown in this figure, the seesaw mechanism 12 described above is not limited to one stage, and may be composed of a plurality of stages in which they are stacked.

FIG. 4 is a diagram showing a third embodiment of the slide structure of the present invention. In this figure, (A) is a state before molding, and (B) is a diagram showing a molded state when the slide and the bolster are deformed.
In this example, the connection mechanism 10 includes one seesaw mechanism 13. The seesaw mechanism 13 includes a force transmission member 13a. Both ends of the force transmission member 13a are coupled to the slide 6 via the fixing member 13c, and transmit the pressing force F from the pressing portion 7 to the intermediate portion of the force transmitting member 13a. The force transmission member 13a is deformed following the deformation of the slide 6. The fixing member 13c may be integrated with the force transmission member 13a or the slide 6.
The force transmission member 13a can be made of, for example, a laminated metal plate, a metal with low rigidity (for example, aluminum), or the like.

  With this configuration, as shown in FIG. 4B, the force transmission member 13a is deformed and the load F acting on the pressing portion 7 is distributed almost evenly to both ends of the force transmission member 13a. The load distribution to be approached is even and the mold can be evenly adhered.

  Further, the configuration of the seesaw mechanism 13 is not limited to one level as in the case of FIGS. 2C and 3C, and may be configured by a plurality of levels stacked.

  FIG. 5 is a fourth embodiment of the slide structure of the present invention. In this figure, (A) is a state before molding, and (B) is a diagram showing a molded state when the slide and the bolster are deformed.

In this example, the coupling mechanism 10 includes a structural member 14a and a flexible member 14b.
At least both ends of the structural member 14a are connected to the slide 6 and swing following the deformation of the slide 6. The flexible member 14b connects the intermediate portion of the structural member 14a and the pressing portion 7 so as to be swingable, and transmits the pressing force F from the pressing portion 7 to the intermediate portion of the structural member 14a.
The entire lower surface of the structural member 14 a may be integrated with the slide 6 as long as the slide 6 follows the deformation of the bolster and the central portion can be deformed downward.
The flexible member 14b can be formed of, for example, a laminated metal plate, a disc spring, a metal with low rigidity (for example, aluminum), a cylindrical member having ease of bending because of its small diameter, and the like. In addition, you may connect the intermediate part of the structural member 14a, and the pressing part 7 so that rocking | fluctuation is possible using the above-mentioned rotatable member.

  With this configuration, even when the flexible member 14b is provided below the pressing load pressing portion 7 and the structural member 14a below the pressing portion 7 is formed integrally with the slide 6, as shown in FIG. Moreover, the flexible member 14b acts effectively and acts on the upper surface of the mold so that the load F acting on the pressing portion 7 can be distributed to both end portions of the structural member 14a almost equally by making the left and right central portions low rigidity. The load distribution is made to approach evenly, and as a result, the mold can be evenly adhered.

  FIG. 6 is a diagram showing a fifth embodiment of the slide structure of the present invention. In this figure, (A) is a state before molding, and (B) is a diagram showing a molded state when the slide and the bolster are deformed.

In this example, the coupling mechanism 10 includes a cylinder 15a and a plurality of pistons 15b.
The cylinder 15 a is sealed with fluid and receives a pressing force F from the pressing portion 7. The internal fluid is preferably an incompressible fluid (for example, hydraulic oil), and the fluid pressure is increased by the pressing force F from the pressing portion 7.
The pressing portion is connected to or integrated with the cylinder, and is configured to move up and down the cylinder 15a.
A plurality of (in this example, two) pistons 15b are configured to be extendable and contractable in the cylinder 15a, and their lower end portions are connected to the slide 6 so as to move up and down by fluid pressure.

With this configuration, as shown in FIG. 6B, the load F of the pressing portion 7 of the press load is evenly transmitted to the piston 15b by the fluid pressure (hydraulic pressure), and is lifted by the plurality of cylinders 15a in contact with the slide 6. By allowing the mold 3 to be pushed down and bringing the load distribution acting on the upper surface of the mold closer to each other, the mold can be evenly adhered.
As shown in FIG. 8, in the fluid-sealed type, the pressing component force is determined from the balance between the force and the fluid pressure.
This “pressing component force” is not limited to the same, and may be divided by being distributed in an inclined manner.

FIG. 9 is a diagram showing a sixth embodiment of the slide structure of the present invention. This figure is a modification of FIG. 5, and the slide 6 has a low-rigidity portion 16 in which one or more portions between the pressing portions 7 are set to have low rigidity so that the slide 6 can be deformed following the deformation of the bolster. Prepare.
FIG. 9A shows a slide at no load, and FIG. 9B shows a slide at the time of molding.
In FIG. 9A, the low-rigidity part 16 set to low rigidity works like a hinge by deformation mainly in bending, and the left and right structures 17 sandwiching the low-rigidity part can swing. . Similarly to the example of FIG. 5, the pressing portion and the slide are connected by a swinging member such as a flexible body or a rotatable member.
In FIG. 9B, the left and right structures 17 (a part of the slide) sandwiching the low-rigidity portion 16 are inclined so as to adapt to the deformation of the bolster. Also, the left and right structures are also deformed.

FIG. 10 is a diagram showing a seventh embodiment of the slide structure of the present invention. In this figure, (A) shows a switching mechanism 18 according to the present invention. On the other hand, (B) shows an example in which an invention without a switching mechanism is not effective.
In other words, if the workpiece or mold to be molded is large, the embodiment shown in FIG. 9 is very effective, but the mold or workpiece is small as shown in FIG. In some cases, it may be inconvenient to have a low-rigidity part such that the center part of the slide is easily deformed upward.
Therefore, in this example, the slide 6 is configured to have a switching mechanism capable of switching between a case where the rigidity of the low rigidity portion is lower than that of other parts of the slide and a case where the rigidity is equal to the other.
That is, as shown in FIG. 10 (B), in contrast to the example in which the bending rigidity of the slide is reduced by providing a notch in the upper portion of the slide, the upper portion of the slide is changed by the switching mechanism 18 as shown in FIG. 10 (A). By combining these, the rigidity can be made equivalent to the case without notches.

According to the configuration of the present invention described above, each of the plurality of pressing portions 7 that move up and down in synchronization with each other includes the connection mechanism 10 that transmits the pressing force to the slide, and each connection mechanism 10 guides the slide so that it can be pushed and pulled. The connecting portions 10a are connected to the slide 6 at locations spaced apart from each other in the horizontal direction, and the pressing force is divided into pressing component forces via the connecting mechanism 10. Since each of the connecting parts 10a is transmitted to the connecting part 10a and pushes and pulls the slide 6 until each pressing component force reaches a predetermined balance,
For example, even if the center of the bolster is deformed downward because the bolster is supported at both ends by the bed, the molding pressure between the upper and lower molds is changed while the center of the slide is deformed downward following this. Can be equalized.

Moreover, the slide 6 can be easily deformed following the bolster 5 by setting the slide 6 to have a low rigidity that can deform the center portion downward following the deformation of the bolster 5.
Therefore, the slide can be remarkably reduced in weight as compared with the conventional case, and sufficient press molding can be performed.
The case where the bolster is supported at both ends and the center part of the bolster bends downward has been described. However, the effect of the present invention is the same.
The effect of the present invention is also the same when the bolster is sufficiently supported by the bed and the bolster is deformed following the deformation of the bed.

  In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention.

It is operation | movement explanatory drawing of the conventional press machine. It is 1st Embodiment figure of the slide structure of this invention. It is 2nd Embodiment figure of the slide structure of this invention. It is 3rd Embodiment figure of the slide structure of this invention. It is 4th Embodiment figure of the slide structure of this invention. It is 5th Embodiment figure of the slide structure of this invention. It is a figure which shows the example of an expansion to the horizontal 2 direction of a pressing part. It is explanatory drawing of the balance in a seesaw mechanism type and a fluid sealing type. It is 6th Embodiment figure of the slide structure of this invention. It is 7th Embodiment figure of the slide structure of this invention. 1 is a schematic diagram of a “processing press” in Patent Document 1. FIG. 6 is a schematic diagram of a “pressurizing device” in Patent Document 2. FIG. It is a schematic diagram of "a machine press device for processing a long object" of Patent Document 3. 10 is a schematic diagram of a “die mounting position correction device for a press machine” disclosed in Patent Document 4. FIG.

Explanation of symbols

1 work 2 lower mold 3 upper mold 4 bed
5 Bolster, 6 slide, 7 pressing part,
10 connection mechanism, 10a connection part,
11 seesaw mechanism, 11a seesaw member,
11b oscillating member, 11c fixing member,
12 seesaw mechanism, 12a seesaw member,
12b rocking member, 12c fixing member,
13 seesaw mechanism, 13a force transmission member, 13b fixing member,
14a structural member, 14b flexible member,
15a cylinder, 15b piston,
16 Low rigidity part, 17 Left and right structure,
18 Switching mechanism

Claims (11)

A bolster in which the lower mold is fixed to the upper surface; a slide in which the upper mold is fixed to the lower surface; and a plurality of pressing portions that are positioned above the slide and move up and down in synchronization with each other. A slide structure of a press machine that press-molds a workpiece between a mold and an upper mold,
Each pressing part has a coupling mechanism that transmits the pressing force to the slide,
Each coupling mechanism includes a plurality of coupling parts guided so as to push and pull the slide,
Each connecting portion is connected to the slide at a position spaced apart from each other in the horizontal direction,
The pressing force is divided into pressing component forces via a connecting mechanism and transmitted to each connecting portion.
A sliding structure of a press machine, wherein each connecting portion pushes and pulls the slide until each pressing component force reaches a predetermined balance.   The slide structure of a press machine according to claim 1, wherein the coupling mechanism includes one or a plurality of stacked seesaw mechanisms.   The seesaw mechanism includes a seesaw member having both ends connected to a slide and swinging following the deformation of the slide, and an intermediate part of the seesaw member swingably supported, and a pressing force from a pressing part is intermediate. The slide structure for a press machine according to claim 2, comprising a swinging member that transmits to the part.   The connecting mechanism is structured such that at least both ends are connected to the slide and swings following the deformation of the slide, and the intermediate part of the structural member and the pressing part are swingably connected so that pressing from the pressing part The slide structure for a press machine according to claim 1, further comprising a swinging member that transmits a force to the intermediate portion.   The seesaw mechanism includes a force transmission member having both ends connected to the slide and transmitting a pressing force from the pressing portion to the intermediate portion, and the force transmission member is deformed following the deformation of the slide. The slide structure of the press machine according to claim 2.   The coupling mechanism includes a cylinder in which a fluid is sealed and receiving a pressing force from the pressing portion, and a plurality of pistons whose lower ends are connected to a slide and move up and down by the pressure of the fluid. The slide structure of the press machine according to claim 1.   7. The slide according to claim 1, wherein the slide is set to have low rigidity so that the slide can be deformed following the deformation of the bolster by the pressing component force. The slide structure of the press machine as described in any one of Claims.   7. The slide according to claim 1, wherein at least one portion between the pressing portions is set to have low rigidity so that the slide can be deformed following the deformation of the bolster. 8. The slide structure of the described press machine. A bolster in which the lower mold is fixed to the upper surface; a slide in which the upper mold is fixed to the lower surface; and a plurality of pressing portions that are positioned above the slide and move up and down in synchronization with each other. A slide structure of a press machine that press-molds a workpiece between a mold and an upper mold,
A swing member that supports the slide so as to be swingable and transmits a pressing force from a pressing portion to the slide,
The slide includes a low-rigidity part in which one or more points between the pressing parts are set to low rigidity so that the slide can be deformed following the deformation of the bolster,
The slide structure of a press machine, wherein the slide swings until the left and right structures reach a predetermined balance with the low-rigidity portion as a boundary and closely contacts the bolster.   The slide has a switching mechanism capable of switching between a case where the rigidity of the low-rigidity portion is lower than that of other parts of the slide and a case where the rigidity is equal to the other. The slide structure of the press machine described in 1.   The slide structure of a press machine according to any one of claims 3, 4, 9, and 10, wherein the swing member is a flexible body or a rotatable member.

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