JPH1024400A - Housing of press machine and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation of a loop frame and upper/lower pressure receiving boards in pressing operating by reducing the stress to act on a loop frame and upper/lower pressure receiving boards in press by a press machine so as to execute pressing action in the state close to no stress. SOLUTION: The housing 1 of press machine is constituted of a loop frame 2 made of a looped material with steel plate stacked, a pair of upper/lower pressure receiving boards 3, 4 of roughly semicircle shape, a pair of side plates 5 and a tapered rib 6 for lock to surely hold the pressure receiving boards 3, 4. The loop frame 2 has looped shape and obtd. by coiling thin/long steel plate 50-100 turns. Further, the loop frame 2 is constructed with a pair of curved parts 2a respectively located vertically and a pair of straight parts 2b respectively located left/right, and pressing force of press machine is dispersedly received at the curved parts 2a. A plate thickness and plate width of loop material is arbitrarily decided corresponding to a size of the pressing force of press machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press housing and a method of manufacturing the same, and more particularly, to a press housing in which an upper frame, a lower frame, and columns supporting these frames are integrated, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a press has been used as a machine for cutting or forming a material by applying pressure to a workpiece or compressing an object.

FIG. 18 shows a conventional general press machine 20. The conventional press machine 20 has a main cylinder 22 disposed on a base 21, and a ram 23 of the main cylinder 22 projects upward. A lower frame 24 serving as a pressure receiving plate is provided on the outer periphery of the main cylinder 22.
Are mounted on the lower frame 24, and the lower ends of four columns 25, 25,... These columns 25, 25,.
Each book constitutes a side frame. An upper frame 26 serving as a pressure receiving plate located immediately above the lower frame is supported on the upper ends of these four columns 25, 25,....

A lower pressure plate 27 is supported on a ram 23 of the main cylinder 22 and is supported by the upper frame 2.
6, an upper pressing plate 28 is supported downward so as to face the lower pressing plate 27.

In such a conventional press machine 20, a work is placed on a lower pressing plate 27, and the ram 23 of the main cylinder 22 is raised by hydraulic pressure or the like to raise the lower pressing plate 27 upward. Move to. And
Pressure is applied to the workpiece between the upper pressing plate 28 and the lower pressing plate 27 to form a workpiece having a desired shape.

On the other hand, when a pressure is applied to the workpiece, this force acts as a reaction force on each component of the press machine 20 by action / reaction. In particular, a bending stress or a shear stress is applied to the upper frame 26 and the lower frame 24, and the columns 25, 25,.
Is subjected to tensile stress.

Therefore, the upper frame 26, the lower frame 24, and the columns 25, 25,... Are made of a shaft, a thick plate, or a casting mainly composed of steel so as to have strength capable of withstanding bending stress and tensile stress. Was formed of a thick plate.

[0008]

However, in the conventional press machine 20, stress concentrates on the central portions of the upper frame 26 and the lower frame 24, and deformation is apt to occur in these portions, and fatigue fatigue is locally caused. There was a risk of doing so.

In the conventional press machine 20, the upper frame 26, the lower frame 24, and the columns 25, 2
5, ... were formed as separate bodies, so that the strength of each frame was uneven. Moreover, each frame 24, 2
Since the bolts 5 and 26 were joined by various joining means such as bolts and nuts or welding, it was difficult to accurately calculate the strength required for the entire frame in consideration of the strength.

Further, each of the frames 24, 25, 26
Is formed of a thick plate of a casting, cavities may be formed inside due to a difference in cooling between the inside and outside of the frames 24, 25, 26 at the time of manufacturing, and the reliability cannot be said to be sufficient.

Further, each frame 24, 25, 26
Since the strength of the frame was exclusively adjusted by the material of the frames 24, 25 and 26 and the thickness of the frames 24, 25 and 26,
The weight became large, leading to high costs.

The present invention has been made in view of such problems, and is a lightweight and high-strength housing.
An object of the present invention is to provide a press housing and a method for manufacturing the same, which can uniformly and reduce the stress applied to the frame during pressurization and can be manufactured simply and at low cost.

[0013]

According to the first aspect of the present invention, there is provided a press machine housing comprising: a loop frame having a curved portion in a vertical position; and a curved portion of the loop frame. It comprises a pair of pressure receiving disks each having an inscribed curved surface, and a pair of side plates fitted between the two pressure receiving disks to support the pressure receiving disks. And by adopting such a configuration, high strength is obtained with a simple structure,
The stress applied to the frame at the time of pressurization is uniformly received by the curved portion of the loop frame, so that stress concentration can be prevented from occurring.

A feature of the press machine housing according to the second aspect is that the loop frame is formed in a loop shape by stacking and winding a long thin plate from one end. By adopting such a configuration, manufacturing is easy, and strength calculation of the loop frame is easy, so that it is possible to reduce material costs while maintaining safety.

A feature of the press housing according to the third aspect is that a taper rib for locking for holding the pressure receiving disk is fitted between the pressure receiving disk and a pair of side plates. And by adopting such a configuration, it is possible to adjust the side plate by the locking taper rib without making the dimensional accuracy of the side plate strict.

A feature of the method for manufacturing a press machine housing according to the present invention is that a long thin plate is stacked from one end and wound to form a loop material, and the loop material has a curved surface to be joined to the loop material. Inscribe a pair of pressure receiving plates provided respectively,
These pressure receiving plates are moved in the diameter direction of the loop material so as to be separated from each other, and the loop material is pushed flat to form a loop frame, and the pressure receiving plate is held. The present invention is characterized in that a pair of side plates are fitted between the pressure receiving plates to manufacture a press housing. According to such a manufacturing method, a press machine housing having a frame that is in a state close to no stress when pressurized can be manufactured simply and at low cost.

A feature of the method for manufacturing a press machine housing according to the fifth aspect is that a long thin plate is piled up from one end and wound to form a loop material, and a portion of the loop material separated in the diameter direction is formed. Each of them is pressed inward to narrow the loop width, and a pair of pressure receiving plates each having a curved surface to be joined to the loop material are inscribed at both ends in the longitudinal direction of the loop material, and these pressure receiving plates are attached. A loop frame is formed by moving the loop material outward in the longitudinal direction of the loop material and pushing the loop material flat to form a loop frame, and a pair of side plates is provided between the two pressure receiving plates so as to hold the pressure receiving plate. The point is that the plate is inserted to manufacture the press housing. According to such a manufacturing method, the loop frame can be formed more accurately, and a press machine housing having high strength can be easily manufactured.

A method of manufacturing a press machine housing according to a sixth aspect of the present invention is characterized in that a pair of flat protective plates are applied to a part of the outer peripheral surface of the loop material, and these protective plates are fastened by tightening bolts. The point is that each of the loop members is pressed inward by tightening to reduce the loop width. And according to such a manufacturing method, it becomes easy to form a loop frame in a desired shape.

The method of manufacturing a press machine housing according to the present invention is characterized in that the loop material is pushed flat by using a jack disposed between a pair of pressure receiving plates. is there. And according to such a manufacturing method,
The loop frame can be easily formed.

[0020] The method of manufacturing the press machine housing according to the present invention is characterized in that the main jack is interposed between the center portions of the two press receiving plates mainly for extending the loop material. A pair of auxiliary jacks disposed on both sides of the main jack extend the loop material so as to form a loop frame in order to uniformly push and extend the loop material while maintaining the parallel relationship between the pressure receiving plates. The point is to do so. According to such a manufacturing method, a loop frame having a more precise shape can be formed.

A feature of the method for manufacturing a press machine housing according to the ninth aspect is that the loop material is extended by a main cylinder which is a pressure source of the press machine. And according to such a manufacturing method, since a manufacturing process can be simplified, a press machine housing can be manufactured more easily.

A feature of the method of manufacturing a press machine housing according to the tenth aspect is that, when a pair of side plates are inserted between the pressure receiving plates, a space between the pressure receiving plate and each of the side plates is provided. The taper ribs for locking are fitted into the pressure receiving plates respectively to hold the pressure receiving plate. According to such a manufacturing method, even if the height of the side plate is smaller than the interval between the pressure receiving plates, the pressure receiving plate is surely supported by being adjusted by the lock taper rib. Can be.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 to FIG. 10 show a first embodiment of the present invention. FIG. 1 shows a press housing 1 according to the first embodiment. The press machine housing 1 includes a loop frame 2 made of a loop material 8 on which steel plates are stacked, and a pair of upper and lower press receiving plates 3 having a substantially semicircular shape so as to be in close contact with the curved portion 2 a of the loop frame 2. 4, a pair of side plates 5 for supporting the pressure receiving plates 3, 4, and the pressure receiving plate 3 by filling gaps between the pressure receiving plates 3, 4 and the side plates 5. , 4 for securing the taper rib 6 for locking.

The loop frame 2 has a loop shape in which a thin long steel plate is wound, for example, 50 to 100 times from one end. The loop frame 2 includes a pair of curved portions 2a positioned vertically and a pair of curved portions 2a positioned right and left.
And a pair of straight portions 2b.
, The pressing force of the press machine 10 can be distributed and received. The radius of curvature of the curved portion 2a and the straight portion 2
The length of b can be determined arbitrarily, and the loop material 8
Of the pressing machine 10 can be arbitrarily determined according to the magnitude of the pressing force of the press machine 10. The strength of the loop frame 2 is proportional to the number of turns, plate thickness, plate width, and the like of the loop frame 2. For this reason, the thinner the plate thickness, the more precise the strength calculation can be performed, and the easier it is to form a loop.

Each of the pressure receiving plates 3 and 4 has an arcuate curved surface portion 3a, 4a and an outer peripheral surface composed of flat portions 3b, 4b formed of flat surfaces communicating with both ends of the curved surface portions 3a, 3b. The curved portions 3a and 4a are inscribed in and support the curved portions 2a and 2a of the loop frame 2, and the flat portions 3b and 4b receive the pressing force of the main cylinder 15. Has become. The flat portions 3b, 4
The pressing force received by b is distributed to the curved portion 2a of the loop frame 2 via the curved portions 3a, 4a. Further, the pressure receiving plates 3 and 4 have a pair of side surfaces 3c and 4c formed of flat surfaces located on both sides of the outer peripheral surface. Further, the inside of the pressure receiving plates 3 and 4 may be solid, or a space may be provided if necessary rigidity can be obtained.

The side plate 5 is for supporting the upper press receiving plate 3 and the lower press receiving plate 4, and as shown in FIG. 2, a flat plate 5a and two side plates 5b.
Are joined in a U-shape with the flat plate 5a at the center. Further, a square notch 7 is formed at the tip corner at the lower end of each side plate 5b of the side plate. The upper end surface of the side plate 5b comes into contact with the end of the flat portion 3b of the upper pressure receiving platen 3, while
A taper rib 6 for locking is fitted into a notch 7 formed at a corner at the lower end of the side plate 5b.

The locking taper rib 6 is fitted as a wedge between the side plate 5 and the lower pressure receiving plate 4 to fix each side plate 5, and a space between the two pressure receiving plates 3, 4. Is to ensure. As shown in FIG. 3, the locking taper rib 6 is composed of two halves 6a and 6b each having a rectangular parallelepiped shape as a whole. Surfaces 6c, 6c are formed. Therefore,
Even when the height of the side plate 5 is smaller than the distance between the upper pressure receiving plate 3 and the lower pressure receiving plate 4, the pair of halves 6a, 6
b is inserted into the notch 7 of the side plate 5 by sliding the inclined surface 6c of the other half 6b along the inclined surface 6c of the one half 6a. Thereby, the pressure receiving plates 3 and 4 can be reliably held.

Next, a method of manufacturing the press housing 1 of the first embodiment will be described with reference to FIGS.

First, as shown in FIG. 4, a thin long steel plate is wound a predetermined number of times from one end to form a loop material 8. Each end of the loop material 8 is fixed by welding or an adhesive and a rivet. The diameter and the number of turns of the loop member 8 may be arbitrarily determined according to the magnitude of the pressing force and the like. Then, the pair of pressure receiving plates 3 and 4 are arranged on the inner peripheral surface of the loop material 8 such that the curved portions 3a and 4a are in contact with each other (see FIG. 5). A main jack for flatly extending the loop material 8 between the flat portion 3b of the upper press receiving plate 3 and the flat portion 4b of the lower press receiving plate 4 so as to have a predetermined loop width. A main hydraulic jack 11 is provided.
, Auxiliary auxiliary hydraulic jacks 12 are provided on both sides of the auxiliary hydraulic jacks 12. Each sub-hydraulic jack 12 pushes the loop member 8 with a uniform force while keeping the flat portions 3b, 4b of the pair of pressure receiving plates 3, 4 parallel to each other. (See FIG. 6). When the upper pressure receiving plate 3 and the lower pressure receiving plate 4 are moved in the diametrical direction of the loop frame 2 by the hydraulic jacks 11 and 12 so as to be vertically separated from each other, the loop frame 2 Is deformed into a substantially elliptical shape which is flat to the left and right, and a linear portion 2b along the longitudinal direction is formed on the left and right (see FIGS. 6 and 7). The operation of pushing and extending by the hydraulic jacks is continued until the frame width of the loop frame 2 and the linear portion 2b have a desired length. And
When the loop frame 2 has a desired shape, in order to maintain this shape, the side plate 5 is moved from outside the linear portion 2b of the loop frame 2 to the flat portions of the upper and lower pressure receiving plates 3, 4. 3b and 4b, and the upper and lower end corners of each side plate 5b of the side plate 5 are flattened 3b and 4b of the upper pressure receiving disk 3 and the lower pressure receiving disk 4.
To support the upper pressure receiving plate 3 (see FIG. 8). Next, the notch 7 formed at the lower corner of the side plate 5b of the side plate 5 has the tapered rib 6 for locking.
Is inserted to fill the gap between the lower pressure receiving plate 4 and the side plate 5 to reliably support the upper pressure receiving plate 3.

After manufacturing the press housing 1 by the above method, as shown in FIG. 9, the main cylinder 15 as a pressurizing source of the press 10 is
And a lower pressing plate 19a is supported on a ram 18 of the main cylinder 15, while the upper pressing plate 3
The upper pressing plate 19b is supported downward on the flat portion 3b so as to face the lower pressing plate 19a. Then, the press machine 10 can be completed by fixing the press machine housing 1 on the press table 9.

A lower pressure plate 27 is supported on the ram 23 of the main cylinder 22, and the upper frame 2
6, an upper pressing plate 28 is supported downward so as to face the lower pressing plate 27.

In the above-described embodiment, the main hydraulic jack 11 and the pair of sub-hydraulic jacks 12 are used to extend and form the loop frame 2. A main cylinder 15, which is a pressurizing source of 10, is provided, and the ram 18 of the main cylinder 15 is raised by the pressing force of the main cylinder 15, and the loop frame 2 is pushed up and down to form a desired shape. You may. Specifically, when disposing the lower pressure receiving plate 4, the lower pressure receiving plate 4 on which the main cylinder 15 is disposed in advance is disposed.
The loop frame 2 may be pushed out with a pressing force of 5.

According to the press machine housing 1 and the method of manufacturing the same according to the first embodiment of the present invention, the press machine housing 1 includes the loop frame 2, the upper and lower press receiving plates 3, 4, the side plate 5, and the lock. Taper rib 6
Therefore, even the large press machine 10 can be easily assembled at a local factory.

10 (a), 10 (b), and 10 (c) show the loop frame 2 and the upper and lower pressure receiving plates 3 and 4, respectively.
As shown in (1), when the loop frame 2 is flatly extended, a stress acts inward when no pressure is applied due to elastic deformation. For this reason, when a stress acts on the outside of the loop frame 2 via the upper and lower pressure receiving plates 3 and 4 when the work is pressed by the main cylinder 15, the stress on the inside and the stress on the outside Is canceled out.
Therefore, the press machine 1 is operated in a state where almost no stress acts on the loop frame 2 and the upper and lower press receiving plates 3 and 4.
A final press operation of 0 is performed, and the deformation of the loop frame 2 and the upper and lower press receiving plates 3 and 4 that occur when a workpiece is formed can be prevented.

Further, since the loop frame 2 is employed as the pressure-resistant frame, the number of turns, the plate width, the frame diameter and the like can be easily changed, so that various press machine housings 1 can be manufactured. Is easy to calculate.

Further, the stress acting on the upper and lower pressure receiving plates 3, 4 and the loop frame 2 is increased by the curved surface portions 3a, 4b.
In addition, since the pressure is uniformly dispersed in the curved portion 2a, concentrated stress does not occur, and the press machine housing 1 that can withstand high pressure can be provided. Therefore, the overall weight of the press machine 10 can be reduced. For example, a press machine 10 using the press machine housing 1 of the present invention with respect to a conventional press machine 20 needs only about 2/3 of the weight. If this is converted into a cost aspect such as a material cost, in the present invention, an inexpensive thin plate is used, so that the cost can be reduced to about half of the conventional cost. Therefore, a larger press 10 can be manufactured at low cost.

Next, a second embodiment of the present invention will be described with reference to FIGS.

In the second embodiment, the structure of the press housing 1 is substantially the same as that of the first embodiment, but the manufacturing method of the press housing 1 is different. Therefore, the description of the structure of the press machine housing 1 will not be repeated, and its manufacturing method will be described in detail.

As shown in FIG. 11, the method for manufacturing the press housing 1 according to the second embodiment is as follows. A loop material 8 made of a long steel plate is wound so as to have a predetermined size, and both ends are welded or the like. Fix it. A pair of flat plate-like protection plates 1 is provided on the outer peripheral surface of a portion of the loop material 8 which is separated in the diameter direction.
3 and is tightened by a tightening bolt 14 until a predetermined loop width is obtained (see FIG. 12). Each protective plate 13
Is made larger than the width of the steel plate of the loop material 8, and is made to protrude laterally from both sides of each protection plate 13 and the loop material 8; A plurality of tightening bolts 14 are installed between both side portions so as to pass therethrough, and each of the tightening bolts 14 is prevented from coming off by a nut 14a. Three tightening bolts 14 are provided for each side of the protective plate 13 so that the loop material 8 is uniformly tightened by the protective plate 13 by rotating each nut 14a. When the loop material 8 is tightened to a predetermined loop width, only the middle tightening bolt 14 of the three tightening bolts 14 on one side is left, and the two tightening bolts 14 on the upper and lower steps are removed. After a predetermined loop width of the loop material is secured, a space for insertion inside the loop 8 is formed. Then, the upper pressure receiving plate 3 and the lower pressure receiving plate 4 loaded with the main cylinder 15 are disposed so as to be in close contact with the inner peripheral surface of the curved portion 2a of the loop material 8 (see FIG. 13). . At this time, the upper pressure receiving platen 3 is held by a holding member (not shown). A lower pressing plate 19a is supported on the ram 18 of the main cylinder 15, and an upper pressing plate 19b is provided on the flat portion 3b of the upper pressing receiving plate 3 so as to face the lower pressing plate 19a. It is supported downward. And the main cylinder 1
A plurality of liner plates 16 functioning as spacers are loaded on the upper surface 5, the main cylinder 15 is operated, and the ram 18 of the main cylinder 15 is raised (see FIG. 14). After the loop material 8 is pushed up and down by the pressing force of the main cylinder 15 so as to have a desired frame width of the loop frame 2 and a length of the linear portion 2b, the remaining intermediate tightening bolts 14 are removed. Then, a flat side plate 5 is fitted between the flat portion 3b of the upper press receiving plate 3 and the flat portion 4b of the lower press receiving plate 4 (see FIG. 15). This side plate 5 has a side plate 5b of the side plate 5 described in the first embodiment.
Similarly to the above, a notch 7 for fitting the lock taper rib 6 is formed. Therefore, the locking taper rib 6 is fitted into the notch 7 of the side plate 5, and the side plate 5 and the lower pressure receiving plate 4 are fitted.
And fill the gap. In this way, the upper press receiving plate 3 and the lower press receiving plate 4 are securely held, and the press machine housing 1 is completed (see FIG. 16).

When the side cover 17 having the legs formed on the press machine housing 1 is disposed, the press machine 10
Will be completed.

In the method of manufacturing the press housing 1 according to the second embodiment, when the loop frame 2 is formed, a force for vertically extending the main frame 15 is applied. As in the first embodiment described above, the loop frame 2 may be formed by applying a pushing force by the main hydraulic jack 11 and the auxiliary hydraulic jack 12.

Further, a plurality of loop members narrowed to a predetermined loop width by the protection plate 13 and the tightening bolts 14 are prepared, and these loop members are arranged in a direction perpendicular to the plane of FIG. If a loop frame is formed by the main cylinder or the like, a large-sized press can be manufactured by a simple method.

Therefore, according to the press machine housing 1 and the manufacturing method thereof according to the second embodiment of the present invention, the press machine housing 1 is composed of the loop frame 2, the pressure receiving plates 3, 4, the side plates 5, and the locking plate. Taper rib 6
It can be easily assembled at a local factory.

The loop frame 2 and the upper and lower pressure receiving plates 3 and 4 are provided with the components shown in FIGS. 17 (a), (b) and (c).
As shown in (1), when the loop frame 2 is flatly extended, a stress acts inward when no pressure is applied due to elastic deformation. For this reason, when a stress acts on the outside of the loop frame 2 via the pressure receiving plates 3 and 4 when the workpiece is pressed by the main cylinder 15, the inward stress and the outward stress Will be offset. Therefore, the loop frame 2 and the upper and lower pressure receiving plates 3, 4
Can be reduced, and finally the press operation of the press machine 10 is performed in a state close to no stress. For this reason, the loop frame 2 and the upper and lower pressure receiving plates 3,
4 can be prevented, and the pressing machine 1
0 can be downsized and a high-pressure press machine 10 can be introduced even in a narrow space.

Further, the number of turns and the plate width of the loop frame 2,
Since the frame diameter and the like can be easily changed, various types of presses 10 can be designed, and the strength calculation of the press housing 1 is also easy.

Further, since concentrated stress is prevented from being generated in the loop frame 2 and the upper and lower pressure receiving plates 3 and 4 and the stress is dispersed to the curved portion 2a and the curved surface portions 3a and 4a, the press machine 10 The deformation of the loop frame 2 and the upper and lower press receiving plates 3 and 4 during pressurization can be prevented, and the weight of the press 10 can be reduced. Therefore, the frame can be made smaller than that of the conventional press machine 20, and it is possible to contribute to a reduction in material costs and manufacturing costs.

The present invention is not limited to the above embodiments, but can be variously modified as needed.

For example, the loop frame 2 is formed by winding long steel plates so as to overlap each other to form a loop.
As the number of turns, various numbers of turns can be selected according to the rigidity required for the press machine 10.

When the pressure receiving plates 3 and 4 are held by the side plates 5, the locking taper ribs 6 are used as wedges. If it can be formed so that the distance from the board 4 and the height from the side plate 5 completely match,
The taper rib 6 for locking may not be used.

Further, the jack used to extend the loop material 8 need not be limited to a hydraulic jack, but may be a jack utilizing water pressure or a rack.

[0052]

As described above, according to the present invention, the stress acting on the loop frame and the upper and lower press receiving plates at the time of pressurizing the press machine can be reduced, and the pressurizing operation can be performed with almost no stress. In addition, deformation of the loop frame and the upper and lower pressure receiving plates during the pressing operation can be prevented.

Further, since the stress applied to the loop frame is small even when a high pressure is applied to the workpiece, the press can be downsized and the production cost can be reduced.

Further, since the structure of the press machine housing is simple, it can be manufactured easily, and the calculation of the strength of the loop frame can be performed accurately and easily.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a press machine housing according to the present invention.

2 (a) is a front view (side plate) of a side plate which is a component of the press housing of the present invention, and FIG. 2 (b) is a similar side view (flat plate).

FIG. 3 (a) is a front view of a locking taper rib which is a component of the press housing of the present invention, and FIG. 3 (b) is a similar side view.

FIG. 4 is a plan view showing a loop material used as a loop frame in the method for manufacturing a press housing according to the first embodiment of the present invention.

FIG. 5 is an explanatory view showing a state in which a pair of pressure receiving plates are arranged on a loop material in the method for manufacturing a press machine housing according to the first embodiment.

FIG. 6 is an explanatory diagram showing a state in which a loop material is pushed out by a main hydraulic jack and a sub-hydraulic jack in the method for manufacturing a press machine housing in the first embodiment.

FIG. 7 is an explanatory view showing a state in which a loop frame is formed in the method for manufacturing a press machine housing according to the first embodiment.

FIG. 8 is an explanatory diagram showing a state in which a side plate is fitted in the method for manufacturing a press machine housing according to the first embodiment.

FIG. 9 is a front view showing a press using the press housing in the first embodiment.

FIG. 10A is an explanatory diagram showing a stress state of the press machine housing in the first embodiment in a non-pressurized state, FIG. 10B is an explanatory diagram of a stress state in an initial pressurized state, and FIG. ) Is an explanatory diagram showing the stress state in the final pressurized state

FIG. 11 is a plan view showing a loop material used as a loop frame in the method for manufacturing a press machine housing according to the second embodiment.

FIG. 12 is an explanatory view showing a method for reducing the loop width of the loop material in the method for manufacturing a press machine housing according to the second embodiment.

FIG. 13 is an explanatory view showing a state in which a pair of pressure receiving plates are arranged on a loop material in the method for manufacturing a press machine housing according to the second embodiment.

FIG. 14 is an explanatory diagram showing a state in which a liner plate is loaded on a main cylinder and a loop material is pushed out in the method for manufacturing a press machine housing in the second embodiment.

FIG. 15 is an explanatory view showing a state in which a side plate and a locking taper rib are fitted between a pair of pressure receiving plates in the method for manufacturing a press housing in the second embodiment.

FIG. 16 is an explanatory view showing a press in which a side cover is attached to a press housing in the second embodiment.

FIG. 17 (a) is an explanatory view showing a stress state in a pressurized state of the press housing in the second embodiment, FIG. 17 (b) is an explanatory view showing a stressed state in an initial pressurized state, and FIG. ) Is an explanatory diagram showing the stress state in the final pressurized state

FIG. 18 is a front view showing a conventional press machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press machine housing 2 Loop frame 3 Upper press receiving board 4 Lower press receiving board 5 Side plate 6 Tapered rib for locking 7 Notch 8 Loop material 10 Press machine 11 Main hydraulic jack 12 Secondary hydraulic jack 13 Protective plate 14 Tightening bolt 15 Main cylinder

Claims (10)

[Claims] 1. A press machine housing provided around a main cylinder of a press machine and supporting a press machine body, comprising: a loop frame having a curved portion at a vertical position; and a curved surface inscribed in the curved portion of the loop frame. A press housing characterized by comprising a pair of pressure receiving disks provided respectively and a pair of side plates fitted between the two pressure receiving disks for supporting the pressure receiving disks. . 2. The press machine housing according to claim 1, wherein said loop frame is formed in a loop shape by winding a long thin plate from one end. 3. The press according to claim 1, wherein a lock taper rib for holding the pressure receiving plate is fitted between the pressure receiving plate and each of the side plates. housing. 4. A loop material is formed by laminating and winding a long thin plate from one end, and a pair of pressure receiving plates each having a curved surface joined to the loop material is inscribed in the loop material. A loop frame is formed by moving the pressure receiving plates in the diametrical direction of the loop material so as to be spaced apart from each other, and pressing the loop material flat to form a loop frame. A method for manufacturing a press machine housing, wherein a pair of side plates are fitted between pressure receiving plates to manufacture a press machine housing. 5. A loop material formed by laminating a long thin plate from one end to form a loop material, and pressing the diametrically separated portions of the loop material inward to reduce the loop width, A pair of pressure receiving plates each having a curved surface joined to the loop material at both ends in the longitudinal direction are inscribed, and these pressure receiving plates are respectively moved outward in the longitudinal direction of the loop material to remove the loop material. Forming a loop frame by flattening and extending the pair of side plates between the two pressure receiving plates so as to hold the pressure receiving plate, thereby manufacturing a press housing. A method for manufacturing a press housing. 6. A pair of flat protective plates are applied to a part of the outer peripheral surface of the loop material, and these protective plates are tightened with tightening bolts to press the loop materials inward to reduce the loop width. 6. The method according to claim 5, wherein
5. The method for manufacturing a press machine housing according to 1. 7. The apparatus according to claim 4, wherein a jack is provided between the pair of pressure receiving plates, and the jack is used to push the loop material flat. 7. The method for manufacturing a press housing according to any one of 6. 8. A main jack interposed between central portions of both pressure receiving plates to push and extend a loop material as the jack, and the pair of pressure receiving plates maintain a parallel relationship with each other. 8. The method according to claim 7, wherein a pair of auxiliary jacks disposed on both sides of the main jack are used to uniformly spread the material. 9. A main cylinder, which is a pressure source of a press machine, is disposed between said pair of pressure receiving plates, and said main cylinder extends a loop material. A method for manufacturing a press housing according to claim 6. 10. When the side plates are inserted between the pressure receiving disks, locking taper ribs are inserted between the pressure receiving disks and the respective side plates to hold the pressure receiving disks. The method for manufacturing a press housing according to any one of claims 4 to 9, wherein