JP3692184B2 - Press machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a press machine, and more particularly to a press machine that improves processing accuracy by preventing deformation of a frame.
[0002]
[Prior art]
3 and 4, a press machine 101 having a C-shaped frame conventionally has an overall C-shaped frame 105 provided with a notch 103 at a position corresponding to the processing region. A slider 109 that moves up and down along the slide guide 107 is provided at the top of each frame 105.
[0003]
A crankshaft 111 is rotatably provided above the slider 109, and a slide drive motor 115 is provided at one end of the crankshaft 111 via a gear mechanism 113.
[0004]
On the lower surface of the slider 109, an upper sub-plate 117 on which an upper mold (not shown) is mounted is provided. In addition, a bed 119 is provided integrally with the lower portion of the frame 105, and a lower sub-plate 121 on which a lower mold (not shown) is mounted is provided on the bed 119.
[0005]
Accordingly, the workpiece is positioned between the upper die and the lower die, and the slider 109 is moved up and down by rotationally driving the crankshaft 111 with the slide drive motor 115 to perform press working.
[0006]
[Problems to be solved by the invention]
However, in such a conventional technique, when the frame 105 is deformed so as to open its mouth due to a reaction force acting on the upper die and the lower die during press working (see FIG. 5), In some cases (see FIG. 6). In these cases, there is a problem that the alignment accuracy of the punch and the die is lost and the processing accuracy is lowered.
[0007]
Referring to FIG. 7, in order to solve such a problem, as shown in Japanese Utility Model Laid-Open No. 63-56996, a straight side press in which the left and right frames 123 are not provided with the notches 103 as described above. 125 is used to prevent opening of the mouth, and by connecting the left and right frames 123 with tie rods 127, the frame 123 is prevented from bulging. However, in this case, there is a problem that workability is deteriorated because each frame 123 is not notched.
[0008]
The object of the present invention has been made by paying attention to the conventional techniques as described above, and improves the machining accuracy by preventing the opening of the frame of the conventional C-type press and the swelling to the left and right by a simple method. An object of the present invention is to provide a press machine that achieves this.
[0009]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems. In a press machine having left and right frames having a C shape, left and right upper ends are respectively attached to upper front portions of the left and right frames by a plurality of bolts. The lower end of each vertical tie rod is attached to the lower front part of each of the left and right frames with a plurality of bolts, and both ends of the horizontal tie rods provided between the left and right vertical tie rods are pressed below the upper end. Further, it is attached to the left and right vertical tie rods at a position slightly above the lower surface of the slider provided to be freely movable up and down .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0016]
1 and 2 show a press machine 1 according to the present invention. Here, the illustrated internal structure of the press machine 1 is basically the same as that already described above, so a detailed description of the internal structure will be omitted.
[0017]
Referring to FIGS. 1 and 2, on the upper side and the lower side of the notch 7 corresponding to the processing region in the front end face 5 of the left and right frames 3L and 3R, the step 9 is formed so that the notch 7 side becomes higher. 9 is provided.
[0018]
On the other hand, the H-type tie rod 11 attached to the front side of the frames 3L and 3R connects the pair of vertical tie rods 13L and 13R attached to the front end surface 5 of the frame 3 to the vertical tie rods 13L and 13R at a substantially central height position. One horizontal tie rod 15.
[0019]
As shown in FIG. 1, the horizontal tie rod 15 is attached to the vertical tie rods 13L and 13R by bolts 19 via a base plate 17 at a position slightly above the lower surface of a slider 27 that can move up and down. It is composed. Here, the vertical tie rods 13L and 13R and the horizontal tie rod 15 are both made of square pipes.
[0020]
The vertical tie rods 13 </ b> L and 13 </ b> R of the H-type tie rod 11 are attached to the front side end face 5 of the frame 3 with bolts 23 via fillers 21. The filler 21 is provided with a step 25 having a shape corresponding to the step 9 provided on the frame 3. It is effective to attach the filler 21 to the upper and lower portions of the vertical tie rods 13L and 13R by welding.
[0021]
Accordingly, by moving the slider 27 up and down, an unillustrated upper mold mounted on the upper sub-plate 29 on the lower surface of the slider 27 and a lower unillustrated mounted on the lower sub-plate 33 mounted on the bed 31. The press work is performed in cooperation with the mold, and the vertical tie rods 13L and 13R suppress the opening of the front surface of the frame 3 that occurs at this time. At this time, since the step 9 on the front surface of the frame 3 and the step 35 of the filler 21 are engaged with each other, there is no slip.
[0022]
In addition, since the horizontal tie rod 15 suppresses the outward bulge and the inward deformation of the frame 3, the deformation of the frame 3 can be sufficiently prevented. Thereby, since the consistency of the upper mold and the lower mold is maintained, the processing accuracy can be improved.
[0023]
Further, since the vertical tie rods 13L and 13R and the horizontal tie rod 15 are attached to the main body of the press machine 1 which is the current machine, the strength of the frame 3 can be easily increased and the processing accuracy can be improved without incurring costs.
[0024]
Further, since it has a notch 7 and the cross-sectional dimensions of the vertical tie rods 13L and 13R may be smaller than the cross-sectional dimension of the column of the straight size press, it is easy to interpose a manpower to the processing part during the setup work. The workability of the C-type frame can be maintained.
[0025]
The present invention is not limited to the above-described embodiment, and can be implemented in other modes by making appropriate modifications. That is, in the above-described embodiment, the square pipes are used as the members of the vertical tie rods 13L and 13R and the horizontal tie rod 15. However, the present invention is not limited to this, and any member may be used as long as sufficient tensile strength is obtained.
[0026]
In the above-described embodiment, the vertical tie rods 13L and 13R are attached to the frame and the horizontal tie rod 15 is attached to the vertical tie rods 13L and 13R by the bolts 23 and 19, but they are joined by welding instead. You may do it.
[0027]
Moreover, although the case where one horizontal tie rod 15 was attached was demonstrated in the above-mentioned embodiment, the case where two or more are used is also considered.
[0028]
【The invention's effect】
As described above, in the press machine according to the present invention , when pressing is performed by a press machine having a C-shaped frame, the vertical tie rod fixed to the front surface of the frame prevents the so-called frame opening caused by the reaction force. Therefore, it is possible to secure the consistency between the upper mold and the lower mold and improve the processing accuracy. Moreover, since this vertical tie rod is retrofitted to the front surface of the frame, it can be easily attached to a press machine that has been used conventionally.
[0029]
In addition, the vertical tie rod fixed to the front surface of the frame prevents the so-called frame opening caused by the reaction force during the press working, and the horizontal tie rod prevents the frame from deforming in the horizontal direction. Improvements can be made.
[Brief description of the drawings]
FIG. 1 is a front view showing an entire press machine according to the present invention.
FIG. 2 is a side view seen from the direction II in FIG.
FIG. 3 is a front view showing an entire conventional press machine.
4 is a side view seen from the direction IV in FIG. 3;
FIG. 5 is an explanatory view showing a so-called opening state during press working.
FIG. 6 is an explanatory view showing a state in which the frame swells in the horizontal direction during press working.
FIG. 7 is a front view showing a straight frame press machine.
[Explanation of symbols]
1 Press machine 3 Frame 5 Frame front 7 Notch 9 Step (Step on the frame side)
13 Vertical tie rod 15 Horizontal tie rod 25 Step (step on the vertical tie rod side)

Claims (1)

Left and right vertical tie rods (13L, 13R) having upper ends attached to upper front portions of the left and right frames (3L, 3R) by a plurality of bolts (23), respectively, in a press machine having left and right frames having a C-shape. Are attached to the lower front portions of the left and right frames (3L, 3R) by a plurality of bolts (23), respectively, and both ends of the horizontal tie rod (15) provided between the left and right vertical tie rods (13L, 13R). A portion is attached to the left and right vertical tie rods (13L, 13R) at a position slightly above the lower surface of the slider (27) provided below the upper end portion so as to be movable up and down in the press machine. Press machine.

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