JP2015136732A - hydraulic press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic press which can suppress the generation of an eccentric load, can prevent an inclination of a slide even if the eccentric load is liable to be generated, and can obtain a forged product high in dimension accuracy.SOLUTION: A first sub-slide 7, a second main slide 8 and a third sub-slide 9 are guided by individual slide guides. The slide guide of the second main slide 8 is a hang-out X-type guide. The second main slide 8, the first sub-slide 7 and the third sub-slide 9 each have one independent metal die set, and can perform multi-process forging, however, the slide is guided by an exclusive slide guide when forging, for example, in only one process out of three processes, an eccentric load is thereby hardly generated, an inclination of the slide is favorably prevented even if the eccentric load is generated, and the parallelism of each slide can be accurately held. Therefore, a forged product which is high in dimension accuracy can be obtained.

Description

  The present invention relates to a hydraulic press. More specifically, the present invention relates to a hydraulic press that performs multi-step forming of a forged product.

As a hydraulic press for multi-step forming of forged products, one slide is moved up and down by one main cylinder, and a plurality of sub-cylinders are built in the slide. There was a type with a type holder attached.
In this type of hydraulic press, the slide is lowered by the main cylinder, the material between the upper die and the lower die is pressurized, and further, the plurality of sub cylinders are lowered to further reduce the upper die. Finished the molding.
However, in this type of hydraulic press, there is only one main cylinder and one slide. Therefore, when the material is contained only in the end die set among the plurality of upper and lower die sets, the slide is caused by the eccentric load. Tilt was likely to occur. In this case, the dimensional accuracy of the forged product decreases.

In order to solve the above problems, a hydraulic press having a plurality of (for example, two) main cylinders on a slide has been developed.
However, even in this hydraulic press, since there was only one slide, when the material is contained only in the end mold set among the plurality of upper and lower mold sets, the slide is inclined due to the eccentric load. It was. Also in this case, improvement in the dimensional accuracy of the forged product cannot be expected.

When the slide is tilted as described above, the dimensional accuracy of the molded product is lowered. Therefore, as one means for avoiding this, a measure to increase the rigidity of the slide guide can be taken. However, doing so results in expensive equipment.
Further, in the configuration in which a plurality of mold sets are attached to one slide, it takes time to finely adjust the molds (shut height, etc.) between the molds in each process, which is disadvantageous for high-mix low-volume production.

On the other hand, a patent that uses a plurality of slides for the plate bending press instead of forging, and a hydraulic cylinder is arranged between each slide and the press frame, so that the slide lowering amount can be adjusted individually. There is the prior art of Document 1.
The technique disclosed in Patent Document 1 enables a workpiece to be machined with a single press even for a workpiece that requires a plurality of different machining operations by different protrusion amounts and pressurization for each mold.
Since the prior art of this plate bending press does not focus on the inclination of the slide due to the eccentric load, there is no mention of a slide guide that prevents the inclination of the slide.

In the prior art of Patent Document 2, three sub-slides are attached to one main slide, and two plungers are attached between the left and right crowns of the main slide.
The structure of this prior art is intended to suppress the influence of the press reaction force on the central portion of the main slide where the plunger is not attached, and does not consider the inclination of the slide.
Accordingly, there is no disclosure of the slide guide for the main slide, and the slide guide for the sub-slide is composed of one vertical guide rail provided between the left and right sides of the sub-slide and the side wall of the main slide and a guide member fitted to the guide rail. It is only a simple thing. In other words, even if the left and right direction guide can be managed, there is no guide capability in the front-rear direction, and therefore no guide capability in the oblique direction. Therefore, it cannot be applied to a forging press that requires a powerful guide function.

JP-A-8-168897 JP 2009-113096 A

  In view of the above circumstances, the present invention can suppress the generation of an eccentric load in a press for forming a forged product in a multi-step process, and can prevent a tilt of a slide even if an eccentric load is generated, thereby obtaining a forged product with high dimensional accuracy. An object is to provide a hydraulic press.

A hydraulic press according to a first aspect of the present invention is a hydraulic press for forming a forged product in a multi-step process, a press frame in which a bed and a crown are connected with upright, a give block attached to the upright, and a crown. A first sub-cylinder, a second main cylinder, a third sub-cylinder, which are attached in order of processes; a first sub-slide attached to the first sub-cylinder; a second main slide attached to the second main cylinder; A third sub-slide attached to the third sub-cylinder, a first slide guide for guiding the first sub-slide, a second slide guide for guiding the second main slide, and a guide for the third sub-slide A third slide guide, and the second slide guide includes a guide portion provided on the give block; It is configured to be guided by a guide portion provided on the second main slide, and the first slide guide is provided on the front and rear give blocks on the press entry side and the guide portion provided on the first sub-slide. The third slide guide is configured to be guided by a guide portion provided on the front and rear give blocks on the press exit side and a guide portion provided on the third sub-slide. It is characterized by.
The hydraulic press according to a second aspect of the present invention is the hydraulic press according to the first aspect, wherein the second slide guide has a guide portion that is formed to project from the four corners of the second main slide in the left-right direction. The constituting guide surface is an overhanging X-type guide having a surface substantially parallel to a virtual line connecting the press center and each upright center.
The hydraulic press according to a third aspect of the present invention is the hydraulic press according to the first or second aspect, wherein the first slide guide and the third slide guide are respectively provided on the outer end surface and the outer end surface at both ends in the front-rear direction of each sub-slide. It is an opposed U-shaped six-surface guide composed of six guide portions guided from three adjacent side surfaces.
The hydraulic press according to a fourth aspect of the present invention is the hydraulic press according to the first or second aspect, wherein the front and rear two give blocks on the press entry side and the front and rear two give blocks on the press exit side are both integrally formed. The first slide guide and the third slide guide are respectively guided at two end portions in the front-rear direction of each sub-slide from the outer end surface and one side surface adjacent to the outer end surface; The sub-slide is an opposing five-surface guide comprising a guide portion provided between the other side surface along the front-rear direction of the sub-slide and the give block.
The hydraulic press according to a fifth aspect of the present invention is the hydraulic press according to the second aspect, wherein the first slide guide and the third slide guide are extended X-shaped in the second slide guide at both ends in the front-rear direction of the sub-slide, respectively. It is an opposed X-type four-surface guide comprising a guide portion having a guide surface parallel to the guide surface of the guide and a guide portion having a guide surface perpendicular to the guide surface.

According to the first invention, the second main slide is firmly guided at the four corners by the slide guides, and the first sub-slide and the third sub-slide are also respectively guided by the dedicated slide guides. Since the second main slide, the first sub-slide, and the third sub-slide can be formed by one independent mold set, an eccentric load is unlikely to occur. Even if an eccentric load is generated, the slides are individually guided by a dedicated slide guide, so that the inclination of each slide is well prevented, and the parallelism of each slide with respect to the bed is maintained with high accuracy. For this reason, a forged product with high dimensional accuracy is obtained.
According to the second invention, the four guide surfaces of the overhanging X-type guide in the second slide guide are substantially parallel to the virtual line from the press center substantially the same as the press load point to the center of each upright. The load in the upright direction due to the load is released by sliding on the guide portion, and the upright is hardly deformed. For this reason, a forged product with high dimensional accuracy is obtained.
According to the third aspect of the invention, the opposite U-shaped six-surface guides guide the both ends of the first sub-slide and the third sub-slide from the outer end surface and the three adjacent side surfaces. Guided in both the left and right directions. For this reason, the parallelism with respect to a bed is maintained with high precision, and a forged product with high dimensional precision is obtained.
According to the fourth aspect of the present invention, since the two giving blocks on the press entrance side and the two giving blocks on the press exit side are integrated, the deformation of the upright hardly occurs. In addition, since the first sub-slide and the third sub-slide have their guide rigidity enhanced by opposing five-surface guides, forged products with high dimensional accuracy can be obtained.
According to the fifth invention, the extended X-type guide of the second main slide and the guide portion of the opposed X-type four-surface guide of the first sub-slide are opposed to each other, and the opposed X-type four-surface of the third sub-slide Since the guide portions of the guide are also opposed to each other, the press load transmitted from the second main slide is transmitted to the upright through the first sub slide or the third sub slide via the give block. Thus, since the sub-slide is interposed between the two front and rear give blocks to prevent deformation of both, the guide rigidity of the second main slide is further increased, and a forged product with high dimensional accuracy is obtained.

It is a principal section sectional front view of the hydraulic press concerning a 1st embodiment of the present invention. It is a cross-sectional view shown by the II-II line in the hydraulic press of FIG. It is explanatory drawing of the multistep operation | work in the hydraulic press of FIG. It is explanatory drawing of the single process operation | work in the hydraulic press of FIG. It is a cross-sectional view of the hydraulic press in the second embodiment of the present invention. It is a cross-sectional view of the hydraulic press in the third embodiment of the present invention.

Next, an embodiment of the present invention will be described with reference to the drawings.
First, a basic configuration of a hydraulic press to which the present invention is applied will be described with reference to FIG.
The hydraulic press P is a forging machine that forms a forged product in a multi-step process including three steps. The press frame is a known structure in which the bed 1 and the crown 2 are connected by four uprights 3. It should be noted that the upright 3 includes configurations other than four in the present invention. A bolster 13 is installed on the bed 1. The lower mold is installed on the bolster 13, and the upper mold is attached to a slide described later.

(First embodiment)
Hereinafter, this embodiment will be described in detail.
A first sub-cylinder 4, a second main cylinder 5, and a third sub-cylinder 6 are attached to the crown 2 in order of process from the left side to the right side in the figure. A first sub slide 7 is attached to the first sub cylinder 4, a second main slide 8 is attached to the second main cylinder 5, and a third sub slide 9 is attached to the third sub slide 6. It has been.
The feature of the present invention is that the three slides are individually operated by three cylinders, and the three slides are each guided by a dedicated slide guide as will be described later.

  The hydraulic press of the present embodiment is for three steps, the set of the first sub cylinder 4 and the first sub slide 7 is for the first step, and the set of the second main cylinder 5 and the second main slide 8 is for the second step. The set of the third sub cylinder 6 and the third sub slide 9 is for the third step.

The first sub-cylinder 4 and the third sub-cylinder 6 use small-diameter hydraulic cylinders with a small output, and the second main cylinder 5 uses a large-diameter hydraulic cylinder with a large output.
A small cylinder 11 is built in the second main slide 8 and is pressure-molded together with the pressure of the main cylinder 5. In addition, what does not have this small cylinder 11 is also contained in this invention.

Next, the structure of the slide guides of the slides 7, 8, 9 will be described with reference to FIG.
Each of the slides 7, 8 and 9 has an individual slide guide, and adopts a guide structure effective for measures against eccentric load according to the mounting position.

  Of the three slides attached to each cylinder, the second main slide 8 is a large slide, and the first sub-slide 7 and the third sub-slide 9 are small slides. The cross section (cross section in the XY plane) of the second main slide 8 is a long square, and the length in the Y direction is longer than that in the X direction. The cross section (cross section in the XY plane) of the first sub-slide 7 and the third sub-slide 9 is also a long rectangle, and the length in the Y direction is longer than the X direction.

The lengths of the slides 8, 7, and 9 in the X direction and the Y direction are arbitrary, and are not limited to the illustrated embodiment. Therefore, in the illustrated embodiment, the ratio of the Y-direction length of the second main slide 8 to the X-direction length is smaller than the ratio of the Y-direction length of the first and third sub-slides to the X-direction length. This is also an example, and the present invention is not limited to such a length ratio.
In FIG. 2, the left-right direction of the press, that is, the conveying direction of the molding is indicated by an X arrow, and the front-rear direction, that is, the direction orthogonal to the X direction is indicated by a Y arrow.

  Each of the four uprights 3 is provided with one give block 10, and a total of four give blocks 10 are used. 1 and 2, the left side of the figure is the press entry side, and the right side is the press exit side. Therefore, the left two parts are hereinafter referred to as “press entry side give 10L”, and when the front and rear are separated. The reference numerals 10Lf and 10Lr are used, and the right side “give 10R on the press exit side” is used. When the front and rear are separated, the reference numerals 10Rf and 10Rr are used.

  A guide part g4 is formed in the four give blocks 10Lr, 10Lf, 10Rr, and 10Rf. That is, a guide part g4 is formed in the give block 10Lr, and the guide part g4 is a press center O side surface in the left-right direction (X direction) of the give block 10Lr and a press in the front-rear direction (Y direction). It is formed between the surface away from the center O. Furthermore, the guide part g4 is formed so as to be inclined with respect to both the X direction and the Y direction. The guide blocks g4 having the same shape are also formed in the give blocks 10Lf, 10Rr, and 10Rf.

The four corners of the second main slide 8 project in the left-right direction, that is, on the give block side, and a guide part g8 is provided at each projecting part. The guide surfaces of the four guide portions g8 are formed obliquely. That is, in the plan view shown in FIG. 2, the guide surface of each guide part g8 is inclined both in the front-rear direction (Y direction) and in the left-right direction (X direction).
Thus, the guide surface of the guide part g4 on the give block side and the guide surface of the guide part g8 on the slide side are both inclined and can slide with each other.
A slide guide of the type having the guide portion g8 in which the second main slide 8 projects in the left-right direction (X direction) as described above is referred to as an extended X-type slide guide.

In FIG. 2, the symbol O is the center of the press and coincides with the center of the second main slide 8. An imaginary line connecting the press center O and the center of each upright 3 is indicated by a symbol L.
The guide surfaces of the four guide portions g4 of each give block 10 and the four guide portions g8 of the second main slide 8 are substantially parallel to the four virtual lines L. In the present specification, the term “substantially parallel” includes those that are not completely parallel but are inclined with respect to each other at a slight angle. That is, when the upright 3 is deformed toward the press center O, the force acting on the guide surface by the deformation of the upright 3 (that is, the force by which the upright 3 and the give block 10 push the guide surface of the second main slide 8). The angle including such an effect can be included.

  The overhanging X-type guide as described above can reduce the guide gap in the front-rear direction (gap between the guide part g4 and the guide part g8) and the guide gap in the left-right direction. The parallelism of the main slide 8 with respect to the bolster 13 can be maintained with high accuracy.

Next, slide guides for the first and second sub-slides 7 and 9 will be described.
Each of the four give blocks 10Lr, 10Lf, 10Rr, and 10Rf is provided with guide portions g1, g2, and g3, each of which is a set of three, inside the longitudinal direction of the press (Y direction). The guide part g1 has a guide surface extending in the left-right direction, and the guide parts g2, g3 have guide surfaces extending in the front-rear direction. The guide part g1 and the guide parts g2 and g3 intersect at a right angle, and the guide parts g2 and g3 face each other.

  The first sub-slide 7 is guided by two give blocks 10L (10Lr, 10Lf) arranged in the front-rear direction on the press entry side shown on the left side in the drawing. In other words, the outer end surfaces (the end surfaces in the front-rear direction) of the first sub-slide 7 at both ends in the front-rear direction are guided by the guide part g1 of the give block 10Lr and the guide part g1 of the give block 10Lf. Further, both side surfaces (side surfaces in the left-right direction) adjacent to the outer end surface at both ends of the first sub-slide 7 are guided by the guide portions g2 and g3 of the give block 10Lr and the guide portions g2 and g3 of the give block 10Lf. Has been.

The third sub-slide 9 is guided by two give blocks 10R (10Rr, 10Rf) arranged in the front-rear direction on the press delivery side shown on the right side in the drawing. That is, the outer end surfaces (the end surfaces in the front-rear direction) at both ends in the front-rear direction of the third sub-slide 9 are guided by the guide part g1 of the give block 10Rr and the guide part g1 of the give block 10Rf. Further, both side surfaces (side surfaces in the left-right direction) adjacent to the outer end surface at both ends of the third sub-slide 9 are guided by the guide portions g2 and g3 of the give block 10Rr and the guide portions g2 and g3 of the give block 10Rf. Has been.
In this specification, this type of slide guide used for the first sub-slide 7 and the third sub-slide 9 is referred to as an opposed U-shaped six-surface guide.

3 and 4 show a work procedure in the hydraulic press of the first embodiment.
FIG. 3 shows the outline of the three-step operation.
The upper mold M11 of the first process mold M1 is attached to the first sub slide 7, the upper mold M21 of the second process mold M2 is attached to the second main slide 8, and the third process mold. The upper mold M31 of M3 is attached to the third sub-slide 9. The lower molds M12, M22, and M32 in each of the three steps are all installed on the bolster 13.
With this mold arrangement, the cylinders 4, 5, 6 and the slides 7, 8, 9 can be individually moved up and down to perform three-step molding.
That is, the mold M1 is molded by the lowering of the first sub-slide 7, the mold M2 is molded by the lowering of the second main slide 8, and the mold M3 is moved by the lowering of the third sub-slide 9. Is formed. Moreover, the molding operation can be performed independently in the first to third steps.

FIG. 4 shows the outline of the single process operation.
The lower ends of the first sub-slide 7, the second main slide 8, and the third sub-slide 9 are connected by a connecting block 14. The upper mold M41 of the mold M4 is attached to the connecting block 14, and the lower mold M42 is installed on the bolster 13.
With this mold arrangement, three cylinders and three slides can be combined to form a single step.
In this case, the pressurizing force is the combined output of the three cylinders 4, 5, and 6, so that a strong pressurization is possible.

In the three-step operation shown in FIG. 3, when the molds M1, M2, and M3 are attached to the slides 7, 8, and 9 and pressurized, the slides 7, 8, and 9 are guided by dedicated slide guides. Eccentric load is unlikely to occur.
In addition, when one of the slides 7, 8, 9 is pressed with only two adjacent ones, the mold (one or two of M 1 to M 3) assigned to each slide is pressed. As a result, eccentric load is unlikely to occur.
Further, even in the single process operation shown in FIG. 4, the three slides 7, 8, and 9 are connected by the connecting block 14, and the mold M4 is in the center, so that an eccentric load is hardly generated.

  In addition to the above, according to the present embodiment, the parallelism of the slides 7, 8, 9 with respect to the bolster 13 (or the bed 1) is maintained with high accuracy even if an eccentric load is generated for the following reason.

(1) Since the guide surface of the overhanging X-type guide in the second main slide 8 is substantially parallel to a virtual line L from the press center O that is substantially the same as the press load point to the center of each upright 3, the upright 3 is in the center of the press. When deforming toward O, the force acting on the guide surface by the deformation of the upright 3 (that is, the force by which the upright 3 and the give block 10 push the guide surface of the second main slide 8) can be suppressed. For this reason, a forged product with high dimensional accuracy is obtained.

(2) The first sub-slide 7 and the third sub-slide 9 are guided by the respective opposing U-shaped six-surface guides from the outer end surface at both ends of each sub-slide 7 and 9 and the three surfaces adjacent to each other. The Therefore, the slides 7 and 9 are guided both in the left-right direction and the front-rear direction. For this reason, a forged product with high dimensional accuracy is obtained.

(Second Embodiment)
A second embodiment will be described with reference to FIG.
In this embodiment, the front and rear give blocks are integrally coupled by a coupling member, and a facing five-surface guide is adopted as a slide guide.
That is, the front and rear give blocks 10Lr and 10Lf on the press entry side are integrally coupled to each other by the coupling member 10c, and the front and rear give blocks 10Rr and 10Rf on the press delivery side are also integrally coupled to each other by the coupling member 10c. In addition, what manufactured the front and rear give block and the coupling member 10c as an integral member besides the thing which couple | bonded the front and rear give block using the coupling member 10c which is a member different from a give block is also contained in this invention.
And although the guide parts g1 and g2 are the same as the said 1st Embodiment, in this embodiment, the one guide part g5 is provided in the center part of the coupling member 10c.

The first sub-slide 7 has outer end surfaces at both end portions thereof guided by the guide portions g1 of the give blocks 10Lr and 10Lf, an outward side surface is guided by the guide portion g2, and an inward longitudinal intermediate portion (guide portion g2) on the inward side surface. The opposite side) is guided by the guide part g5.
The third sub-slide 9 is also guided by the guide part g1 of the giving blocks 10Rr and 10Rf at the both end portions thereof, by the guide part g2 that contacts the outward side surface, and at the intermediate portion in the front-rear direction on the inward side surface. (Half body side of the guide part g2) is guided by the guide part g5.

In the above configuration, the two guide portions g2 and the one guide portion g5 face each other in the left-right direction.
In the present invention, this type of slide guide is referred to as an opposed five-surface guide.

In the second embodiment, the two giving blocks 10L (10Lr, 10Lf) on the pressing side and the two giving blocks 10R (10Rr, 10Rf) on the pressing side are connected by the connecting member 10c, or Since they are integrated using the integral member, the guide rigidity of the first sub-slide 7 and the third sub-slide 9 is increased, and a forged product with high dimensional accuracy is obtained.
The first sub-slide 7 and the third sub-slide 9 are both guided by guide portions g1 and g1 that face each other in the front-rear direction, and the guide portions g2 and g2 at two locations in the left-right direction and the guide portions that oppose the guide portions. Guided with g5.
Since the guides are thus guided from the front, rear, left and right directions, the parallelism of the sub-slides 7 and 9 with respect to the bolster 13 is maintained with high accuracy.

(Third embodiment)
A third embodiment will be described with reference to FIG.
As the slide guides of the first sub-slide 7 and the third sub-slide 9 in this embodiment, an opposed X-type four-surface guide is adopted.
The four corners of the first sub-slide 7 in plan view are formed as slopes. That is, the slope is inclined with respect to the front-rear direction and the left-right direction, and these four slopes are configured as a guide portion g7.

On the other hand, the front and rear guide blocks 10Lr and 10Lf on the press entry side are each provided with two guide portions g10 and g10. The guide portions g10 and g10 are inclined inward and are in contact with and opposed to the guide portion g7 of the first sub-slide 7.
These four guide portions g10 each have guide surfaces that are substantially orthogonal to the guide surfaces of the adjacent guide portions. That is, the guide part g7 includes a guide part g7 having a guide surface parallel to the guide surface of the overhanging X-type guide in the second slide guide, and a guide part g7 having a guide surface perpendicular to the guide surface. .

  The four corners of the third sub-slide 9 in plan view are also formed on the slope. That is, the slope is inclined with respect to the front-rear direction and the left-right direction, and the four slopes are configured as guide portions g7.

On the other hand, the front and rear guide blocks 10Rr and 10Rf on the press entry side are each provided with two guide portions g10 and g10. The guide portions g10 and g10 are inclined inward and are in contact with and opposed to the guide portion g9 of the third sub-slide 9.
These four guide portions g10 each have guide surfaces that are substantially orthogonal to the guide surfaces of the adjacent guide portions. That is, the guide part g10 includes a guide part g10 having a guide surface parallel to the guide surface of the overhanging X-type guide in the second slide guide, and a guide part g10 having a guide surface perpendicular to the guide surface.

  The guide structure of the first sub-slide 7 and the third sub-slide 9 as described above is referred to as an opposed four-surface X-type guide in this specification.

  In the third embodiment, the extended X-type guide of the second main slide 8 and the X-type guide of the first sub-slide 7 are opposed to each other, and the X-type guide of the third sub-slide 9 is also opposed to each other. Therefore, the force generated in the second main slide 8 can be transmitted to the upright through the first sub slide 7 or the third sub slide 9 via the give block. In this way, the sub-slide 7 (also the sub-slide 9) is interposed between the two front and rear give blocks 10Lr and 10Lf (also 10Rr and 10Rf) to prevent deformation of the second main block. The guide rigidity of the slide 8 is further increased, and a forged product with high dimensional accuracy is obtained.

4 1st sub cylinder 5 2nd main cylinder 6 3rd sub cylinder 7 1st sub slide 8 2nd main slide 9 3rd sub slide g1-g10 Guide part 10 (10Lr, 10Lf, 10Rr, 10Rf) Giving guide

Claims (5)

A hydraulic press for forming a forged product in multiple steps,
A press frame connecting the bed and the crown with upright;
A give block attached to the upright;
A first sub-cylinder, a second main cylinder, and a third sub-cylinder attached to the crown in order of process;
A first sub-slide attached to the first sub-cylinder, a second main slide attached to the second main cylinder, a third sub-slide attached to the third sub-cylinder,
A first slide guide for guiding the first sub-slide, a second slide guide for guiding the second main slide, and a third slide guide for guiding the third sub-slide;
The second slide guide is configured to be guided by a guide portion provided on the give block and a guide portion provided on the second main slide,
The first slide guide is configured to be guided by a guide portion provided on the front and rear give blocks on the press entry side and a guide portion provided on the first sub-slide,
The hydraulic press characterized in that the third slide guide is configured to be guided by a guide portion provided on the front and rear give blocks on the delivery side of the press and a guide portion provided on the third sub-slide. The second slide guide has a guide portion that extends in the left-right direction from the four corners of the second main slide, and the guide surface formed by the guide portion on the side of the give block has a center of press and each upright center. 2. The hydraulic press according to claim 1, wherein the hydraulic press is an overhanging X-type guide having a surface substantially parallel to a connecting virtual line. The first slide guide and the third slide guide respectively include six guide portions that guide from three surfaces of an outer end surface and both side surfaces adjacent to the outer end surface at both end portions in the front-rear direction of each sub-slide. The hydraulic press according to claim 1, wherein the hydraulic press is an opposed U-shaped six-surface guide. The two front and rear give blocks on the press entry side and the two front and rear give blocks on the press exit side are both configured integrally,
The first slide guide and the third slide guide are respectively guided at two end portions in the front-rear direction of each sub-slide from the outer end surface and one side surface adjacent to the outer end surface;
3. The hydraulic press according to claim 1, wherein the hydraulic slide press is an opposing five-surface guide comprising a guide portion provided between the other side surface of each sub-slide in the longitudinal direction of the press and the give block. The first slide guide and the third slide guide each have a guide surface that is parallel to the guide surface of the overhanging X-type guide in the second slide guide at both ends in the front-rear direction of the sub-slide. The hydraulic press according to claim 2, wherein the hydraulic press is an opposed X-type four-surface guide comprising a guide portion having a guide surface perpendicular to the guide surface.

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