JP2000015498A - Frame structure of press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an yield of a stock by preparing a rigid plate which is integrated by welding at a divided position plural rigid members which are manufactured in a divided state at a position where a stress exerting on the rigid plate is small when press working is executed. SOLUTION: Left and right rigid plates 3 which are respectively welded to the inside of a pair of left and right side frames 2 are composed of rigid members 3a and 3b in the vicinity of a bed part 9. The largest stress exerts on an arc-like corner part in the lower part of the rigid plate 3, and a stress generating in a flat part of the bed shows an extremely small value. Thus, when the C shaped rigid plates 3 are manufactured, the plate is separately obtained by being divided at a position where a stress is small, and respective divided members are welded at the divided position and integrated. Therefore, the rigid plate is held in the largeness equal to that in the case that the rigid plate 3 which is formed with a single-sheet plate is used, and manufacturing costs are reduced by lessening a waste of a stock for the rigid plate 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a C-shaped side frame having a C-shaped side frame in a side view, and a C-shaped rigid plate provided inside the side frame to reinforce the side frame and maintain the rigidity of a press machine. C-type press machine or an O-type press having an O-shaped side frame in side view and having an O-shaped rigid plate inside the side frame to reinforce the side frame and maintain the rigidity of the press machine It relates to a rigid plate in a machine.

[0002]

2. Description of the Related Art FIG. 9 is a partial side sectional view of a C-type press machine. In the figure, the frame of the C-type press machine 1 is formed by welding a pair of left and right side frames 2 and a rigid plate 3 provided inside the pair of side frames 2 for reinforcing the side frames 2 by welding. Since the side frame 2 and the rigid plate 3 have an opening 1A that opens forward in substantially the center of the front part, the shape of the frame is C when viewed from the side.
It is shaped like a letter.

At the lower part of the C-type press machine 1 and between the left and right rigid plates 3, 3, a bed front plate 4a and a bed rear plate 4b are provided.
Are welded to the inside of the rigid plate 3 respectively. A bolster 5 is provided on an upper surface of a bed portion 9 formed by the pair of left and right side frames 2 and 2 and the rigid plates 3 and 3, a bed front plate 4a, and a bed rear plate 4b. A lower die 6 for a processing die is provided. A slide 7 is provided on the upper part of the C-type press machine 1 and at a position facing the bolster 5 so as to be movable up and down. A mold 8 is provided.

As shown in FIG. 10, a rigid plate 3 for reinforcing the side frame 2 is a pair of rigid members which are more symmetrical than one rectangular material, as shown in the layout of the rigid plate 3 of the C-type press machine. The plate 3 is cut out and manufactured by welding or the like.

FIG. 11 is a front view of a frame of an O-type press machine, and FIG. 12 is a sectional view taken along line AA of FIG. In the figure, a pair of left and right side frames 22 and a rigid plate 2 are shown.
3 has an O-shaped opening 21A substantially at the lower center.
Further, an upper frame 21a for mounting a drive unit (not shown) of the O-type press machine 21, and a bed unit 21b for supporting a bolster for mounting a lower die for an upper and lower die for press working.
Are welded between a pair of left and right side frames 22, 22 to form an integrated press machine frame. Each rigid plate 23 is manufactured from a single material by fusing or the like, and is welded to the inside of the left and right side frames 22 and 22 so as to be integrated to reinforce the side frames, thereby maintaining the rigidity of the press machine. .

[0006]

As shown in the plan view of a rigid plate of a C-type press machine shown in FIG. 10, a pair of members of a pair of C-shaped rigid plates 3 which are symmetrical to each other from a single rectangular material. Is manufactured, so that there is a problem that the yield of the material is deteriorated and the manufacturing cost is increased. In the O-type press machine 21 as well, the rigid plate 23 shown in FIG. 12 is manufactured from a single material by fusing or the like.
Similarly, there is a problem that the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a frame structure of a press machine capable of improving the yield of a material in manufacturing a C-shaped or O-shaped rigid plate. It is an object.

[0008]

Means for Solving the Problems, Functions and Effects In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a pair of left and right side frames having a C-shape in side view.
2, a C-shaped press machine having a C-shaped rigid plate 3 inside the side frame 2 for reinforcing the side frame 2 and maintaining the rigidity of the press machine. A plurality of rigid members 3a and 3b manufactured in a state of being divided at a position where stress is small are provided with a rigid plate 3 integrated by welding at the divided positions.

According to the first aspect of the present invention, a member manufactured by dividing a C-shaped rigid plate at a position where stress applied to the rigid plate is small, for example, at a flat portion at a front portion of a bed, is formed at the divided position. It is integrated by welding. The rigid plate integrated by welding, compared to the conventional rigid plate made of a single material without dividing, the bed deflection during press working and the frame inclination angle (C-shaped side frame (Corresponding to the opening amount of the opening) is as small as possible, so that the rigidity of the press machine can be maintained. Then, the plurality of divided members are manufactured so that the yield of the raw material is good (that is, the stripping, dimensions, and the like are set), so that the yield can be greatly improved as compared with the related art.

According to a second aspect of the present invention, in the frame structure of the press machine according to the first aspect, the divided rigid members 3a and 3b are made of different materials.

According to the second aspect of the present invention, since the plurality of divided members are manufactured from different materials,
The material, the board length, the dimensions, and the like can be set so that the yield is good. As a result, the yield can be significantly improved as compared with the related art.

According to a third aspect of the present invention, a pair of left and right side frames 22 having an O-shape in side view are provided on the left and right side surfaces. In an O-type press machine having an O-shaped rigid plate 23 for maintaining the rigidity of the machine, a plurality of rigid members 23a, 23a, 2 manufactured in a state where the stress applied to the rigid plate 23 is small at the time of press working.
3b and 23c are provided with a rigid plate 23 integrated by welding at the divided positions.

According to the third aspect of the present invention, a member manufactured by dividing an O-shaped rigid plate at a position where stress applied to the rigid plate is small, for example, at a flat portion above and below an opening is formed at the dividing position. It is integrated by welding. The rigid plate integrated by welding, compared to the conventional rigid plate made of a single material without splitting, the bed deflection during press working and the frame tilt angle (O-shaped side frame (Corresponding to the opening amount of the opening) is as small as possible, so that the rigidity of the press machine can be maintained. Then, the plurality of divided members are manufactured so that the yield of the raw material is good (that is, the stripping, dimensions, and the like are set), so that the yield can be greatly improved as compared with the related art.

According to a fourth aspect of the present invention, in the frame structure of the press machine according to the first aspect, the divided rigid members 23a, 23a, 23b, and 23c are made of different materials. I have.

According to the fourth aspect of the present invention, the plurality of divided members are manufactured from different materials.
The material, the board length, the dimensions, and the like can be set so that the yield is good. As a result, the yield can be significantly improved as compared with the related art.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a frame structure of a press machine according to the present invention will be described below in detail with reference to the drawings.

First, a first embodiment will be described with reference to FIGS. FIG. 1 is a partial cross-sectional side view of a frame of a C-type press machine according to the present invention. Here, the same components as those shown in FIG. In the figure, a pair of left and right side frames 2,
The left and right rigid plates 3, 3 welded to the inside of 2, respectively,
It is divided into two members near the bed 9. That is, each rigid plate 3 is composed of the rigid member 3a and the rigid member 3a.
b, the rigid member 3a and the rigid member 3b
Are welded and integrated at the divided position P.

FIG. 2 is a layout view of the material plate of each rigid plate 3. As shown in FIG. As shown in the figure, a rigid portion 3a and a rigid member 3b are divided at a flat portion of the rigid plate 3 corresponding to the bed portion 9, and the rigid member 3a and the rigid member 3b are separate portions of the same material. It is manufactured from.

Next, the operation and effect of the above configuration will be described. At the time of press working, when the slide 7 descends and the upper die 8 touches the processing material to perform the processing, a downward load F1, which is a pressing force, acts on the lower die 6 and the bolster 5, and the upper die 8 is pressed. An upward load F2, which is this reaction force, acts on the mold 8 and the slide 7. Due to the downward load F1 and the upward load F2, a vertical stress is generated in the C-shaped opening 1A of the side frame 2 and the rigid plate 3. Further, stress is generated in the bed portion 9 by the downward load F1. As a result, a so-called opening phenomenon occurs in which the opening amount of the opening 1A of the side frame 2 and the rigid plate 3 increases. The rigid plate 3 reduces the opening phenomenon and maintains the rigidity of the press machine.

FIG. 3 shows the state of the magnitude of the stress generated in the opening 1A of the frame in which the side frame 2 and the rigid plate 3 are integrated during the press working. In the figure, the stress generated in the arc-shaped corner below the opening 21A (corresponding to the opening 1A) is S1, and the stress generated in the vicinity of the arc-shaped corner is S2. The stress generated in the arc-shaped corner portion above the opening 21A is S3, the stress generated in the central straight portion of the opening 21A is S4, and the stress generated in the flat portion of the bed is S5. At this time, the relationship between the magnitudes of these stresses is expressed by a relational expression “S1> S2 = S3>S4>.
S5 ". As described above, the largest stress S1 acts on the lower circular corner of the rigid plate 3, and the stress S5 generated on the flat portion of the bed shows a very small value.

According to the present invention, the stress S5 generated in the flat portion of the bed
In order to improve the material yield in manufacturing the C-shaped rigid plate 3, the plate was divided at a position where the stress was small, and the plate was separately cut out. It is characterized in that members are welded at divided positions and integrated.

FIG. 4 shows that the rigid plate 3 is divided at a portion of the flat portion of the bed shown in FIG. 3 where the stress is small, and the rigid plate 3 manufactured according to the plan layout shown in FIG. FIG. 7 is a diagram illustrating an analysis of frame deformation during press working of a C-type press machine integrated by being integrated. As shown in the drawing, a bed portion representing the size of the opening phenomenon of the C-type press machine caused by the application of a downward load F1 acting on the bed portion 9 and an upward load F2 which is a reaction force during the press working. 9 has a small inclination angle θ1, which is equivalent to the inclination angle of the bed portion 9 at the time of press working when the rigid plate 3 is manufactured by the conventional material plate shown in FIG. Therefore, it is understood that the rigidity of the frame during the press working is sufficiently maintained.

As described above, the rigidity of the frame by the rigid plate 3 integrated by welding a plurality of members manufactured in a state where the stress applied to the rigid plate 3 is small at the time of press working at the divided positions is welded at the divided positions. It can be held in the same size as when a rigid plate 3 formed of a single plate as in the past is used,
There is an effect that the material yield of the rigid plate 3 can be improved.

Next, a second embodiment will be described with reference to FIG. In the present embodiment, an example is shown in which the divided members of the rigid plate 3 are manufactured from different materials. FIG.
Is an explanatory view of the rigid plate 3 according to the present embodiment. Here, the left side frame 2 of the pair of left and right side frames 2 is described, but the same applies to the right side. The divided rigid members 14a and 14b of the rigid plate 3 are made of different materials. That is,
A rigid member 14a having one C-shaped portion of the rigid plate 3 is manufactured by fusing or the like from a rectangular material having a plate thickness t1, and the other rigid member 14b of the rigid plate 3 is different from the material of the rigid member 14a. It is manufactured from a material having a thickness of t2 by fusing or the like. The thickness t2 of the material of the other rigid member 14b
May have the same thickness as the material of the one rigid member 14a. These rigid members 14a and 14b are welded at the divided position P to form an integrated rigid plate 3, and the rigid plate 3 is welded to the side frame 2 to form an integral structure.

Next, the operation and effect of the press frame structure according to this embodiment will be described. In order to improve the yield of the material of the C-shaped rigid plate 3, as described in the first embodiment, when the rigid plate 3 is divided and manufactured, of the stress applied to the C-shaped frame at the time of press working, Since the stress applied to the flat portion of the bed portion 9 is a very small value as shown in FIG. 3, the plate thickness of this flat portion may be smaller than the arc-shaped corner portion. Therefore,
As shown in FIG. 5, the material of the flat portion (that is, the rigid member 14b) having the plate thickness t2 smaller than the plate thickness t1 of the rigid member 14a having the arc-shaped corner portion is replaced with the rigid member 14a.
Can be manufactured separately from different materials. When each of the divided members of the rigid plate 3 is separately manufactured from a different material, a portion having a small stress is manufactured from a material having a small plate thickness as compared with an arc-shaped corner portion having a large stress. Therefore, the yield of the material can be improved by reducing the waste of the material, and the manufacturing cost can be greatly reduced.

In order to increase the capacity of the press machine and press work a high-precision molded product, the straightness of the bolster to which the lower mold is attached and the straightness of the vertical sliding movement of the slide with respect to the upper surface of the bolster must be good. Is required, and in the C-type press machine, a small opening amount is a condition.
For this reason, a frame structure in which the plate thickness of the rigid plate 3 is usually increased is easy. However, by manufacturing the rigid plate 3 as in the present embodiment, the material yield is greatly improved, and the production cost is greatly reduced. The effect is obtained.

According to the present invention, the rigid plate 3 of the side frame 2 of the C-type press machine is divided at predetermined positions to manufacture the members, thereby improving the yield of the material used and reducing the material cost. Therefore, the production cost can be greatly reduced even if the work cost for dividing, welding and integrating is included.

In the first and second embodiments, C
Although the frame structure of the die press machine has been described, the rigid plate 3 according to the present invention is provided with upright columns at the front portions of a pair of left and right C-shaped frames to further reduce the opening of the C-shaped frame. Having a structure, so-called D
It can also be applied to the frame structure of a mold press machine.

Next, a third embodiment will be described with reference to FIGS. FIG. 6 is a side sectional view of the O-type press machine 21 according to the present embodiment, and corresponds to the AA sectional view of FIG. Note that the same components as those in FIGS. 11 and 12 are denoted by the same reference numerals and description thereof will be omitted. In FIG.
An O-shaped opening 21A is provided at the lower part of the pair of left and right side frames 22, 22, and a rigid plate 23 having the same O-shaped opening 21A as the side frame 22 is integrally welded inside each side frame 22 by welding. Has been The rigid plate 23 is positioned at two positions (a total of four positions) on the left and right sides of each flat portion located at the upper and lower substantially central portions of the O-shaped opening 21A.
And two C-shaped rigid members 23a, 23a which are manufactured by dividing the same material as shown in FIG.
And a single rigid member 23b and a rigid member 23c. The rigid plate 23 is integrated by welding each of the divided rigid members at the divided position Q. And a pair of left and right side frames 22, 2
Each rigid plate 23 is welded to a predetermined position inside 2 to form a side frame 22 of the O-type press machine 21 as an integral body.

Next, the operation and effect of the present embodiment will be described. During the press working, a press working force acts on the side frame 22 in the vertical direction of the press machine. The magnitude of the stress generated in the O-shaped side frame 22 by this pressing force is the same as the stress acting on the C-shaped rigid plate 3 of the C-type press machine shown in FIG. The stress acting on the four arc-shaped corner portions of the opening 21A of the frame 22 is the largest, and the stress generated on the flat portion of the rigid plate 23 at the upper and lower central positions is very small as compared with the stress of the arc-shaped corner portions. . Paying attention to the small stress of this flat portion, the rigid plate 2
3, a plurality of rigid members 23a, 23a,
23b and 23c are welded and integrated at the divided position Q to improve the material yield.

The magnitude of the amount of breathing of the O-type press during the press working depends on the stress and length of the upright portion of the opening 21A formed by the side frame 22 and the rigid plate 23.
Therefore, the thickness and shape of the upright portion of the opening 21A are made the same as those of the conventional machine, and the upper and lower central portions of the opening 21A are divided into flat portions, and each of the divided rigid members is welded at the position Q. Then, the rigidity of the press frame becomes substantially the same as that of the conventional machine.

FIG. 8 shows a fourth embodiment of the frame structure according to the present invention. The rigid plate 23 in the present embodiment includes:
Two C-shaped rigid members 23a having upper and lower arc-shaped corners of the opening 21A and made of the same material,
23a, and rigid members 23b and 23c having flat portions located in the upper and lower central portions of the opening 21A and made of a material different from the rigid member 23a. The plurality of divided rigid members are welded at the divided positions Q and integrated to form a rigid plate 23. The rigid plate 23 is welded to a predetermined position inside the side frame 22 to form an integral body.

Next, the operation and effect of this embodiment will be described. Among the stresses applied to the rigid plate 23 at the time of press working, the stress at the flat portion located substantially at the upper and lower centers is the opening 2
Since the stress at the four corners of 1A is very small compared to the stress at the four corners, the thickness of this part may be smaller than that of the corners. Therefore, the rigid members 23b and 23c of the flat portions are separately manufactured from a material different from the rigid member 23a having the arc-shaped corner portion as shown in FIG. 8, and these rigid members are welded at the division position Q. The rigid plate 23 is formed integrally by welding, and the rigid plate 23 is welded to the side frame 22 to form an integral body, so that waste of material can be reduced and manufacturing cost can be greatly reduced.

In particular, in the O-type press machine 21 in which the front and rear dimensions of the bolster are large, the O-shaped opening 21A of the side frame 22 and the rigid plate 23 often has a long flat portion.
Therefore, when the side frame 22 and the rigid plate 23 are manufactured, as described above, the material at the upper and lower central portions of the opening 21A is made of a material different from the rigid member having the arcuate corners, so that the material is effectively used. The production cost can be greatly reduced due to the reduction of material costs.

According to the present invention, by manufacturing the rigid plate 23 of the O-type press machine 21 by dividing it into a plurality of members at predetermined positions, it is possible to improve the yield of the material cost to be used and reduce the material cost. . Thereby, even if the rigid plate 23 is divided and welded and integrated, the production cost is greatly reduced.

In the above embodiment, the case where a frame of one type of press machine is manufactured has been described. However, in the case of manufacturing a plurality of types of press machines having different press capacities or different slide and bolster dimensions, rigidity is required. By freely designing the board layout of a portion having a high stress acting on the plate and a portion having a small stress that can be used by being divided and welded, it can be manufactured so as to further improve the yield.

[Brief description of the drawings]

FIG. 1 is a partial side sectional view of a C-type press machine showing a first embodiment according to the present invention.

FIG. 2 is an arrangement view of a material plate for a rigid plate according to the present invention.

FIG. 3 is an explanatory diagram of a stress state acting on a rigid plate according to the present invention.

FIG. 4 is an analysis diagram of frame deformation during press working of a C-shaped frame having an integrated rigid plate according to the embodiment.

FIG. 5 is an explanatory view of a rigid plate showing a second embodiment according to the present invention.

FIG. 6 is a side sectional view of an O-type press machine showing a third embodiment according to the present invention.

FIG. 7 is a layout drawing of a rigid plate made of the same material according to a third embodiment.

FIG. 8 is an explanatory diagram of a material plate for a rigid plate manufactured from a different material according to the fourth embodiment.

FIG. 9 is a partial side sectional view of a C-type press machine according to the related art.

FIG. 10 is a layout drawing of a material plate of a rigid plate of a conventional C-type press machine.

FIG. 11 is a front view of a frame of an O-type press machine according to the related art.

FIG. 12 is a sectional view taken along line AA of FIG. 11;

[Explanation of symbols]

Reference Signs List 1 C-type press machine 1A, 21A Opening 2, 22 Side frame 3, 14, 23 Rigid plate 3a, 3b, 14a, 14b, 23a, 23b, 23c
Rigid member 4a Bed front plate 4b Bed back plate 5 Bolster 6 Lower die 7 Slide 8 Upper die 9 Bed part 21 O type press machine 21a Upper frame 21b Bed part t1, t2 Thickness of rigid plate θ1 Bed inclination angle P, Q Weld

Claims (4)

[Claims] A pair of left and right side-view C-shaped side frames (2, 2) are provided on the left and right side surfaces.
In a C-type press machine having a C-shaped rigid plate (3) for reinforcing the side frame (2) inside the (2) to maintain the rigidity of the press machine, the rigid plate (3) is applied to the rigid plate (3) during press working. A press machine characterized by comprising a rigid plate (3) integrated by welding a plurality of rigid members (3a, 3b) manufactured in a state where the stress is divided at a small position at the divided position. Frame structure. 2. The frame structure of a press machine according to claim 1, wherein said plurality of divided rigid members (3a, 3b) are made of different materials. 3. A pair of left and right side-view O-shaped side frames (22, 22) on the left and right sides.
In an O-type press machine having an O-shaped rigid plate (23) for reinforcing the side frame (22) inside the (22) and maintaining the rigidity of the press machine, the O-type press machine is applied to the rigid plate (23) during press working. A rigid plate (23) is provided in which a plurality of rigid members (23a, 23a, 23b, 23c) manufactured in a state of being divided at a position where stress is small are integrated by welding at the divided positions. Press machine frame structure. 4. The frame structure for a press machine according to claim 1, wherein the plurality of divided rigid members (23a, 23a, 23b, 23c).
Is a frame structure of a press machine characterized by being manufactured from different materials.