JPS58218396A - Hydraulic press device - Google Patents

Abstract

PURPOSE:To negate the deflections to be generated in a pressure receiving frame and a movable table, by forming a pressure chamber corresponding to a working surface in at least one of the pressure receiving frame and the movable frame and communicating the same with a pressure chamber for driving the movable table. CONSTITUTION:The 3rd pressure chamber 33 for driving a movable table 4, a hollow chamber 32 of a ram 5 and the 2nd pressure chamber 31 in the table 4 are filled with the pressure oil from a hydraulic source and the table 4 is moved upward. At the same time, the pressure oil is supplied through a hydraulic path 34 into the 1st pressure chambe 30 of a pressure receiving frame 1 as well. The pressure is then transmitted over the entire part of the 1st working surface 9 and the 2nd working surface 10 respectively from the chamber 30 and the chamber 31 so that the force is transmitted over the entire surface of both top and bottom dies mounted to both surfaces 9, 10 to bring the dies into tight contact with each other. Since pressing is accomplished in such a state, the deflections that may be generated in the frame 1 and the frame 4 are negated with each other.

Description

[Detailed description of the invention] The present invention relates to a hydraulic press device.

2. Description of the Related Art Conventionally known hydraulic press apparatuses include those shown in FIGS. 1 to 3, for example. In the hydraulic press apparatus shown in FIG. 1, a pressure receiving frame 1 is supported by a pillar 3 between it and a cylinder frame 2, and a movable table 4 is disposed so as to be vertically movable using the pillar 3 as a guide. This movable table 4 is fixed to the upper surface side of the ram 5.
The ram 5 is formed within the cylinder frame 2 and housed in a pressure chamber 6 in a vertically movable manner. Furthermore, 7 is Natsuto and 8 is Patsuking Land.

Reference numeral 9.10 indicates a working surface, and reference numeral 11 indicates a hydraulic supply/discharge path. Further, in the hydraulic press device shown in FIG. 2, a piston 12 is used in place of the ram 5, and hydraulic supply and discharge passages 13 and 14 for vertical movement of the piston 12 are connected to pressure chambers 15 and 16, respectively. . Other parts are substantially the same as those in FIG. 1, and the same parts in the figure are designated by the same reference numerals and redundant explanation will be omitted. In the hydraulic press device shown in FIG. 3, the ram 5, piston 1
2, a cylinder 17 supports a movable table 18,
A fixed ram 20 (provided on a fixed frame 19 replacing the cylinder frame 2) is combined with a pressure chamber 21 in the cylinder 17. A hydraulic pressure supply/discharge path 22 is connected to this pressure chamber 21. Other details 1 and 2, the same parts in the figures are designated by the same reference numerals and redundant explanations will be omitted. The movable table 4.18 is moved up and down by supplying and discharging hydraulic pressure, and press is applied via molds (not shown) attached to the work surface 9 on the pressure receiving frame 1 side and the work surface 10 on the movable table 4.18 side, respectively. 9. Both work surfaces (mold attachment surface') are required to enable highly accurate press work, especially work that requires the upper and lower molds to be in close contact with each other (for example, molding work).9. , L
It is essential that the OIC has straightness and parallelism, and that the pressure receiving frame 1 and the movable table 4.18 have no deflection.If these conditions are not satisfied, both the upper and lower molds cannot be brought into close contact with each other, resulting in a sagging condition. occurs, resulting in the production of defective products. Within these conditions.

Straightness and parallelism are determined to appropriate values at the manufacturing stage of the device, but deflection depends on the rigidity of the pressure-receiving flume 1 and the movable table 4.18, the force transmission method, in other words, the essential mechanism of the device,
In accordance with the design standards, defects occur to a greater or lesser extent.67'.

The present invention has been developed by focusing on such conventional problems.A pressure chamber is formed in at least one of the pressure receiving frame and the movable tape, and the movable table is attached to the pressure chamber in a size corresponding to the work surface. By applying hydraulic pressure for driving, even if the pressure-receiving frame and movable table are slightly bent, the force is evenly transmitted over the entire surface of the mold, allowing both the upper and lower molds to come into close contact, making it possible to This is an attempt to resolve the problem. Specifically, the hydraulic press device according to the present invention has a configuration in which a pressure chamber of a size corresponding to the work surface is formed in at least one of the pressure receiving frame and the movable table, and the pressure chamber for driving the movable table is communicated with the pressure chamber. belongs to.

The details will be explained below based on FIGS. 4 to 6. In the following description, the same reference numerals will be used for parts that are the same as or similar to those in the prior art, and redundant explanation will be omitted.

FIG. 4 is a diagram showing the first embodiment of the present invention, and shows the pressure receiving frame 1? ) There is a first pressure chamber 30 inside.

A second pressure chamber 31 is formed inside the collapsible Qiboo with an area corresponding to the width of each work surface 9, 10. The ram 5 has a hollow shape.

The third pressure chamber 33 for driving the movable table 4 and the second pressure chamber 31 are brought into communication via the hollow chamber 32,
Furthermore, the sixth pressure chamber 33 and the first pressure chamber 30 are placed in communication via a common hydraulic pressure 34.

Next, to explain the operation, the hydraulic pressure supplied from a hydraulic source (not shown) fills the third pressure chamber 33, the hollow chamber "32, and the second pressure chamber 31, and drives the movable table 4 upward. The same hydraulic pressure is also supplied to the first pressure chamber 30 via the hydraulic path 34, and the first pressure chamber 3 is supplied to the entire first working surface 9 and the second working surface 10, respectively.
0 and the second pressure chamber 31 are transmitted to both working surfaces 9.1.
The force is transmitted to the entire surface of both the upper and lower molds (not shown) attached to the 0, and the molds are brought into close contact with each other. Since the pressing process is always carried out in such a state, even if the pressure receiving arm, V-arm 1, and movable table 4 are deflected, the deflection is, so to speak, canceled out.

FIG. 5 is a diagram showing a second embodiment of the present invention.

In this embodiment, a first pressure chamber 3 is provided inside the pressure-receiving full seam 1.
5 is similar to the first embodiment in that a second pressure chamber 36 is formed inside the movable table 4, but the movable table 4 is supported by a piston 12 instead of the ram 5, and the second pressure chamber 36 is formed inside the movable table 4. The second pressure chamber 36 and the third pressure chamber 38 for driving the movable table 4 are brought into communication via the hollow chamber 3T, and furthermore, the third pressure chamber 38 and the first pressure chamber 35 are in common communication with each other. It is connected via a hydraulic path 39. The sixth pressure chamber 38 is for driving the movable table 4 forward (upward), and another fourth pressure chamber 40 for driving the movable table 4 backward (downward) is also provided within the cylinder frame 2. be.

Next, the effect will be explained. Hydraulic pressure is supplied from a hydraulic source (not shown) to the third pressure chamber 38. Hollow chamber 37 and second pressure chamber 36
The movable table 4 is driven upward, but at this time, the same hydraulic pressure is also supplied to the first pressure chamber 35 via the hydraulic path 39, so that the first and second working surfaces 9 are
The force is uniformly transmitted from both the first and second pressure chambers 35 and 36 to the entire surface of the work surface 9.degree. It transmits information and brings the molds into close contact with each other, and even if some deflection occurs, it cancels it out.

FIG. 6 is a diagram showing a third embodiment of the present invention.

In this embodiment, the same structure as in the first and second embodiments is used.
A pressure chamber 42 is formed in each case. But the first and second
Unlike the embodiment, the movable table 18i is supported by the cylinder 17, and the fifth pressure chamber 431C in the cylinder 17 is combined with the fixed ram 20, and the third pressure chamber 43 and the second pressure chamber 42 are connected, and 6 pressure chamber 43 and the first
The pressure bushing chambers 41 are connected via a common hydraulic path 44.

To explain the effect, 3rd. When hydraulic pressure is supplied to the utility chamber 43 from a hydraulic source (not shown), the hydraulic pressure is supplied to the sixth pressure chamber 43.
and fills the second pressure chamber 42, and at the same time fills the hydraulic passage 44.
Since the first pressure chamber 41 is also filled and exerts a force on the entire first and second working surfaces 9.10, the movable table 18 applies hydraulic pressure to both the third and second pressure chambers 43.42. When it moves forward (raises) in response to the supply, force is transmitted to the entire surface of both the upper and lower dies (not shown) attached to both work surfaces 9 and 10, forcing the dies into close contact with each other, even if the pressure receiving frame 1 Movable table 1
Even if flexure occurs on both sides of 8, it cancels it out.

First of all. Second. In each third embodiment.

Both the pressure receiving frame 1 and the movable table 4.18 have pressure chambers 3 of a size corresponding to the size of the work surfaces 9, 10, respectively.
0, 31, 35, 36, 4142, but the invention is not limited to this, and at least one of the pressure receiving frame 1 and the movable table 4.18 is provided with a "pressure chamber".
Once formed, the original purpose can be achieved.

Further, the size of the pressure chamber element 0.31.35.36°41.42 can be freely made larger than the size of the work surface 9.10.

As described above, according to the present invention, a pressure chamber of a size corresponding to the work surface is formed in at least one of the pressure receiving frame and the movable table, and the pressure chamber is communicated with the pressure chamber for driving the movable table. In the case of molding, ruding work, etc. in which molds are brought into close contact with each other, force is transmitted uniformly to the entire working surface of the pressure receiving frame and movable table, and the force is equally transmitted to the entire surface of the mold to which it is attached. ,
This makes it possible to forcibly bring the molds into close contact with each other, and even if there is some deflection in the pressure receiving frame or movable table, this is an excellent feature in that it can cancel this out and bring the upper and lower molds into close contact. In addition to this effect, even if the device is not straight during the manufacturing stage.

Another effect is that even if there is a defect in parallelism, it can partially cancel it out.

[Brief explanation of drawings]

FIGS. 1 to 6 are side views of main parts broken away, showing conventional hydraulic press equipment, and FIGS. 4 to 6 show embodiments of the present invention, respectively. FIG. 3 is a side view of a correspondingly broken main part. 1 ・・・・・・・・・・・・・・・Pressure frame 2
・・・・・・・・・・・・・・・Cylinder frame 4.
18...Movable table 5...
・・・・・・・・・La Muro, 15.16.21・
・・・・・・Pressure chamber 9.10 ・・・・・・・・・Work surface 12 ・・・・・・・・・・・・Piston 17
・・・・・・・・・・・・・・・Cylinder 30, 3
5.41...First pressure chamber 31, 36.42...Second pressure chamber 33, 38.43...Third pressure chamber 34, 39.44...Hydraulic path

Claims (1)

[Claims] A pressure chamber having a size corresponding to the work surface is formed in at least one of the pressure receiving frame and the movable table. A hydraulic press device in which a pressure chamber for driving a movable table and the above pressure chamber are communicated with each other.