JPH0952200A - Frame structure of hydraulic press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a frame structure of hydraulic press capable of press- working in high precision by disposing connecting members between four uprights so as to reduce deflection/inclination and to prevent damage of die, etc. SOLUTION: Connecting members 7 are respectively disposed in the interval from the neighborhood of lower position of a slide 6, to which most of offset load of an upright 3 is acted, to the neighborhood of height of slide 6, the deflection and inclination generated to the upright 3 by offset load in press forming are suppressed to a minimum. Connecting member mounting parts are arranged as a prescribed thickness is built up at a prescribed position at the side face of upright and wedge grooves in vertical/horizontal directions are respectively arranged so that wedges 11, 12 are mounted in cross shape and mounting screw holes are arranged in a prescribed interval. On the other hand, the connecting members 7, in which cross wedges are recessed at the rear face, are disposed between the side faces of uprights 3 and mounted with bolts 16 attachable/detachable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic press, and more particularly to a frame structure of a hydraulic press which can suppress bending of an upright and inclination of a slide with respect to an eccentric load and can form an accurate product.

[0002]

2. Description of the Related Art Conventionally, in a large-sized press such as a stamping press or a forging press, a hydraulic press has been used, and a large load is applied to the press for forming.

In such a large hydraulic press, members having sufficient rigidity are used for a bed, a crown, and an upright as is well known, but in most cases, eccentric load is applied by pressurizing a slide by a hydraulic cylinder. As a result, the bed, the crown, and the upright are bent or fallen, so that the parallelism between the bed and the slide cannot be maintained, and the parallelism of the upright cannot be maintained, resulting in misalignment.

[0004]

Therefore, in the prior art, an equalizer device is attached to the slide, and the left and right rack and pinion are used to balance the load and suppress the eccentric load. In the tuning method, the load is suppressed by the torsional rigidity of the pinion shaft when an eccentric load is applied, so if you want to maintain the parallelism between the bed and slide with high accuracy, this function (purpose)
Had deviated from.

[0005] Further, although it is also possible to support the slide by a balance supporting device so as to keep it in equilibrium and to move up and down, it becomes expensive and cannot be applied to a high speed one such as a forging press. It was

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and in order to solve the above problems, uprights are installed upright at four corners of a bed and slide between them. In a hydraulic press that is driven up and down by a hydraulic cylinder to perform press molding, an eccentric load is applied to the upright between the four uprights between the lower limit position of the upright slide and the height of the slide. (EN) Provided is a frame structure of a hydraulic press, which is characterized in that connecting members for suppressing the bending and the collapse that occur are respectively installed.

[0007]

In the hydraulic press of the present invention, in order to prevent the upright from bending or collapsing due to an eccentric load, the four uprights between the lower limit position of the slide of the upright and the height of the slide are suppressed. By installing the connecting members respectively, even if an eccentric load is applied to the slide during press forming and a lateral load acts on the upright, the bending and tilting of the upright can be sufficiently reduced by the connecting member, and press forming can be performed accurately. be able to.

Further, in particular, by disposing wedges in a cross shape on the side surface of the upright and by fitting both sides of the coupling member to the cross lights by fitting them into the cross wedge, the front and rear direction of the upright, Bending and tilting in the left-right direction can be reduced to one-tenth or less of the conventional one, and the slide parallel accuracy can be improved.

[0009]

EXAMPLES The present invention will be described below based on examples. FIG. 1 and subsequent figures show one embodiment of the present invention. The hydraulic press 1 has a bed 2 of 4 as shown in FIGS.
The upright 3 is erected in the corner, and the crown 4 is above it.
Is attached to the crown 4, and the hydraulic cylinder 5 for pressure molding is attached to the crown 4.
Is arranged so that the slide 6 can be moved up and down between the uprights 3.

Then, from the vicinity of the lower limit position of the slide 6 on which the most eccentric load of the upright 3 acts, the slide 6
Between the heights of the two parts, a sufficiently rigid coupling member 7 is installed, as shown in FIGS. 1 and 2, to suppress the bending and tilting of the upright 3 due to the eccentric load during press molding to be minimized. are doing.

At the above-mentioned position on the side surface of the upright 3, as shown in FIG. 3, a connecting member mounting portion 8 is provided in a built-up shape with a predetermined thickness, and the connecting member mounting portion 8 has a wedge groove 9 in the vertical direction. And the wedge groove 10 in the horizontal direction are provided respectively, and the wedges 11 and 1 are provided.
2 are mounted in a cross shape, and mounting screw holes 13 are provided at predetermined intervals so that the coupling member 7 can be detachably mounted.

On the other hand, the connecting member 7 has a predetermined thickness, a predetermined width and a sufficient height as described above, and the vertical and horizontal wedge grooves are formed on both sides of the back surface thereof as shown in FIG. Cross-shaped wedge grooves 14 corresponding to 9 and 10 are provided as recesses, and the wedges 11 and 12 in the vertical direction and the horizontal direction are fitted to the upright 3.
Are installed between the side surfaces of the upright 3, and the bolt 16 is inserted into the mounting hole 15 so as to be fixed to the mounting screw hole 13 of the upright 3.

Therefore, by installing the connecting member 7 between the uprights 3 as described above, the uprights 3
Even if an eccentric load is applied to the upright 3, the upright 3 can be prevented from being bent or tilted in the front-rear direction and the left-right direction by the connecting member 7 fitted with the wedges 11 and 12 in a cross shape. For example, when the height of the connecting member 7 is 1500 mm, the parallel difference on both sides of the slide 6 can be reduced to 1/10 of that in the conventional case, and the molding can be performed accurately.

In the above-described embodiment, the connecting members are installed between the four uprights, but the connecting members are installed between the opposing uprights on the front and rear sides or the left and right sides as described above. However, a connecting member may be fixedly installed by welding between the other opposing uprights.

Further, a safety shutter is freely attached to the above-mentioned connecting member so as to be opened and closed, a slide fall prevention device is attached, and one end side of a device for carrying in and out a molding material and a molded product is attached to these members. The parts can be effectively used by arranging them at optimal positions close to each other.

The hydraulic press of the present invention is suitable for cold or hot forging presses having a large eccentric load and a short forming time, but it can be applied to other hydraulic presses to improve the forming accuracy of a formed product. You can

[0017]

As described above, according to the present invention, even if an eccentric load is applied to the upright during press molding, the bending and falling of the upright can be sufficiently reduced by the coupling member, and damage to the mold or the like can be prevented. Not only can it be prevented, but also press molding can be performed accurately.

Further, unlike the conventional rack and pinion system, there is no need for refueling or adjustment, so there is no need for maintenance.

In particular, the wedges are arranged in a cross shape on the side surface of the upright, and both sides of the connecting member are fitted into the cross wedges so as to be installed between the uprights. The conventional 1
It can be reduced to one-half or less, and the parallel accuracy of the slide can be improved.

Further, a safety shutter and a slide fall prevention device are provided on the above-mentioned connecting member provided between the uprights.
It can be effectively used by attaching a device for loading and unloading molding materials and molded products.

[Brief description of drawings]

FIG. 1 is a front view for explaining an embodiment of the present invention,

FIG. 2 is a side view of the above,

FIG. 3 is a front view of a connecting member mounting portion of the above upright,

FIG. 4 is a rear view in which a part of the above-mentioned coupling member is omitted.

[Explanation of symbols]

1 ... Hydraulic press 2 ... Bed
3 ... Upright 4 ... Crown 5 ... Hydraulic cylinder
6 ... Slide 7 ... Coupling member 11, 12 ... Wedge

Claims (7)

[Claims] 1. A hydraulic press in which uprights are provided upright at four corners of a bed, and slides are vertically moved by a hydraulic cylinder between them to perform press forming. From the vicinity of the lower limit position of the slides of the uprights. A frame structure for a hydraulic press, characterized in that a connecting member is installed between four uprights near the height of the slide to prevent the upright from bending or falling due to an eccentric load. 2. The frame of the hydraulic press according to claim 1, wherein wedges are arranged in a cross shape on the side surface of the upright, and both sides of the connecting member are fitted to the cross wedge and are installed between the uprights. Construction. 3. Among the four uprights, a connecting member is fixedly installed by welding between the opposed uprights on the front and rear sides or the left and right sides, and the connecting member can be assembled between the other opposed uprights. The frame structure of the hydraulic press according to claim 1, which is installed. 4. The frame structure of the hydraulic press according to claim 1, wherein the hydraulic press is for cold forging. 5. The frame structure of the hydraulic press according to claim 1, wherein a safety shutter is attached to the connecting member so as to be openable and closable. 6. The frame structure for a hydraulic press according to claim 1, wherein a slide fall prevention device is attached to the connecting member. 7. The frame structure for a hydraulic press according to claim 1, wherein one end side of a device for loading and unloading a molding material and a molded product is attached to the connecting member.