JP2017100174A - Column type press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column type pres device which can uniformly press.SOLUTION: A column type press device (100) comprises: four tie rods (3a to 3d); first and second lambs (12, 22) which are rectangular plate-like members in which four tie rods (3a to 3d) are inserted in respective open holes (12a to 12d, 22a to 22d) formed at four corners thereof; a movable mold (13) fixed to the first lamb (12); and a stationery mold (23) which is fixed to the second lamb (22) and is so located as to face the movable mold (13). The first lamb (12) movable along the tie rods (3a to 3d) is moved toward the fixed second lamb (22) thereby performing pressing. The open holes (12a to 12d, 22a to 22d) of the first and second lambs (12, 22) are respectively so formed as to be expanded in an elliptical shape toward a lamb center side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a column type press apparatus.

  Patent Document 1 discloses a column-type press device.

Japanese Patent Laid-Open No. 06-170589

  In the press apparatus, it is preferable that the movable mold and the fixed mold are brought into close contact with each other and pressed uniformly during the pressurization for pushing the movable mold into the fixed mold. Therefore, in the conventional column-type press device, the tie rod has a large diameter and has a high rigidity, thereby achieving uniform pressing.

  By the way, downsizing of the press device is required. When the diameter of the tie rod is reduced, each tie rod is warped inward during the pressing process that pushes the movable die toward the fixed die, so that the movable die and the fixed die are warped and the entire surface cannot be contacted and the workpiece can be pressed uniformly. There was something I couldn't do.

  As a specific example, there is a press apparatus 900 shown in FIG. In the press device 900, load sources 95a, 95b, 95c (not shown), and 95d (not shown) move the columns 94a, 94b, 94c (not shown), and 94d (not shown) to the fixed mold 923 side, respectively. As a result, the movable mold 913 can be pressed against the fixed mold 923 to apply a press load. However, when the diameters of the tie rods 93a, 93b, 93c, and 93d are reduced, the top plate 911 and the base 922 are deformed so that the center portion protrudes from both ends thereof, so that the tie rods 93a, 93b, 93c, and 93d are movable. The ram 912 may warp so as to protrude toward the center side. As a result, the movable ram 912 is warped so as to protrude toward the top plate 911, and the pedestal 922 is warped so as to protrude toward the opposite side of the movable ram 912 (here, the Z-axis minus side). Since the movable ram 912 and the base 922 warp each other, the movable mold 913 and the fixed mold 923 held by these also warp each other. As a result, since the molding surface 913a of the movable mold 913 and the molding surface 923a of the fixed mold 923 are not in close contact with each other, the press device 900 cannot press the workpiece uniformly.

  The present invention provides a column-type press apparatus that can press uniformly.

According to the column-type press device according to the present invention,
Four tie rods,
First and second rams that are rectangular plate-like members into which the four tie rods are inserted, respectively, in through holes formed at four corners,
A movable mold fixed to the first ram (for example, a movable ram);
A fixed mold that is fixed to the second ram (for example, a fixed ram) and disposed opposite to the movable mold,
A column-type pressing device that presses the first ram movable along the tie rod by moving toward the fixed second ram,
The through holes of the first and second rams are each formed to swell in an elliptical shape toward the ram center side.
According to such a configuration, the movable ram and the fixed ram are provided with through holes through which the tie rods are inserted. Each of the through holes swells in an elliptical shape toward the center side of the ram. Therefore, during the press work for pushing the movable die into the fixed die, even if each tie rod warps inward, the movable ram and the fixed ram release the force applied from each tie rod. Therefore, it is possible to suppress the movable mold and the fixed mold from warping each other. As a result, the entire mating surface of the movable mold and the fixed mold can be brought into close contact, and the workpiece can be pressed uniformly.

  The column type press device according to the present invention can press uniformly.

1 is a schematic diagram illustrating a press device according to a first embodiment. 1 is a cross-sectional view showing a press device according to a first embodiment. FIG. 3 is a schematic diagram showing one step of a pressing method using the press device according to the first embodiment. FIG. 3 is a schematic diagram showing one step of a pressing method using the press device according to the first embodiment. It is a schematic diagram which shows the conventional press apparatus.

Embodiment 1
The press apparatus according to the first embodiment will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating a press device according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view showing the press device according to the first embodiment. 3 and 4 are schematic diagrams illustrating one process of the pressing method using the pressing apparatus according to the first embodiment. 1 to 4, a right-handed xyz three-dimensional coordinate is defined.

  As shown in FIGS. 1 and 2, the pressing device 100 includes a top plate 11, a pedestal 21, tie rods 3a, 3b, 3c, and 3d, columns 4a, 4b, 4c (not shown), and 4d (not shown). A movable ram 12, a movable mold 13, load sources 5a, 5b, 5c (not shown), 5d (not shown), a fixed ram 22, a fixed mold 23, and load receivers 6a, 6b, 6c (illustrated). Abbreviation) and 6d (not shown). The press apparatus 100 is a column type press apparatus that moves the movable mold 13 using columns 4a to 4d.

  The top plate 11 and the pedestal 21 are rectangular plate-like members. Tie rods 3 a, 3 b, 3 c, and 3 d are provided at the four corners of the base 21, respectively, and support the four corners of the top plate 11. The top plate 11 and the pedestal 21 are fixed so as to face each other by tie rods 3a, 3b, 3c, and 3d.

  The movable ram 12 (which may also be referred to as a first ram) is a rectangular plate-shaped member, and has through holes 12a, 12b, 12c, and 12d at four corners. The through holes 12 a, 12 b, 12 c, and 12 d are formed to swell in an elliptical shape toward the center side of the movable ram 12. Tie rods 3a, 3b, 3c, and 3d are inserted through the through holes 12a, 12b, 12c (not shown), and 12d (not shown), respectively. The movable ram 12 is arranged between the top plate 11 and the base 21 so as to be movable along the tie rods 3a to 3d. The movable ram 12 holds the movable mold 13 so that the molding surface 13a of the movable mold 13 faces the pedestal 21 side. In other words, the movable mold 13 is fixed to the main surface of the movable ram 12, in particular, the pedestal 21 side of the movable ram 12.

  Columns 4a, 4b, 4c and 4d are ball screws. Columns 4a, 4b, 4c, and 4d are inserted into the through holes of the top plate 11, and are arranged closer to the center of the top plate 11 than the tie rods 3a, 3b, 3c, and 3d. The ends of the columns 4a, 4b, 4c, and 4d on the pedestal 21 side are mechanically connected to the movable ram 12.

  Load sources 5 a, 5 b, 5 c, 5 d are provided in the opening on the base 21 side of the through hole of the top plate 11. The load sources 5a, 5b, 5c, and 5d rotate the columns 4a, 4b, 4c, and 4d, so that the columns 4a, 4b, 4c, and 4d have the same axial direction as the tie rods 3a to 3d (here, the Z-axis direction). Can be moved to. The load sources 5a, 5b, 5c, and 5d move the columns 4a, 4b, 4c, and 4d to the pedestal 21 side, whereby the movable ram 12 and the movable mold 13 can be moved to the pedestal 21 side. The load sources 5a, 5b, 5c, and 5d are, for example, servo motors.

  The fixed ram 22 (also referred to as a second ram) is a rectangular plate-like member, and has through holes 22a, 22b, 22c, and 22d at four corners thereof. The through holes 22 a, 22 b, 22 c, and 22 d are formed to swell in an elliptical shape toward the center side of the fixed ram 22. Tie rods 3a, 3b, 3c, and 3d are inserted through the through holes 22a, 22b, 22c, and 22d, respectively. The fixed ram 22 is disposed between the movable ram 12 and the base 21 so as to be movable along the tie rods 3a to 3d.

  Load receivers 6 a, 6 b, 6 c, 6 d are arranged between the fixed ram 22 and the base 21. Even when the fixed ram 22 receives a load from the press, the load receivers 6a, 6b, 6c, and 6d support the fixed ram 22 and are hardly moved to the pedestal 21 side so that good pressing can be performed. The fixed ram 22 holds the fixed mold 23 so that the molding surface 23a of the fixed mold 23 faces the movable ram 12 side. In other words, the fixed mold 23 is fixed to the fixed ram 22, in particular, the main surface of the fixed ram 22 on the top plate 11 side. The fixed ram 22 can move along the tie rods 3a to 3d from the load receivers 6a, 6b, 6c, 6d until the fixed mold 23 contacts the movable mold 13.

(Operation of press machine)
Next, operation | movement of the press apparatus 100 is demonstrated.
As shown in FIG. 3, the load sources 5 a, 5 b, 5 c, and 5 d move the movable mold 13 to the pedestal 21 side and press the movable mold 13 against the fixed mold 23. The fixed mold 23 is supported by the pedestal 21 and the load receivers 6a, 6b, 6c, 6d, and hardly moves to the pedestal 21 side even when a load is received from the movable mold 13.

  Here, the center of the top plate 11 is pushed from the load sources 5a, 5b, 5c, and 5d, while the end of the top plate 11 is mechanically connected to the tie rods 3a, 3b, 3c, and 3d. The load source 5a, 5b, 5c, 5d is pulled against the force. Therefore, the top plate 11 warps so as to protrude, and its deflection becomes D1.

  Further, the vicinity of the center of the pedestal 21 is pushed from the load receivers 6a, 6b, 6c and 6d, while the end of the pedestal 21 is mechanically connected to the tie rods 3a, 3b, 3c and 3d. 6a, 6b, 6c and 6d are pulled against the force. Therefore, the pedestal 21 warps so as to overhang, and its deflection becomes D2.

  Since the top plate 11 and the base 21 warp each other, the tie rods 3 a, 3 b, 3 c, 3 d warp so as to protrude toward the center side of the movable ram 12 and the fixed ram 22. The warpage of the tie rods 3a, 3b, 3c, and 3d tends to increase when the diameter-reduced tie rods 3a, 3b, 3c, and 3d are used to reduce the size of the press device 100. As shown in FIG. 4, when the tie rod 3a warps, the tie rod 3a moves to the center side of the fixed ram 22 in the through hole 22a, and may approach or contact the inner peripheral surface of the through hole 22a. However, since the through hole 22a is formed in an elliptical shape toward the center side of the fixed ram 22, a force applied from the tie rod 3a to the inner peripheral surface of the through hole 22a can be released.

  Further, even if the tie rods 3b, 3c, and 3d are warped by the same principle as that of the tie rod 3a in the through hole 22a, the force applied to the inner peripheral surfaces of the through holes 22b, 22c, and 22d can be released, respectively.

  Since the fixed ram 22 releases the force applied from the tie rods 3a, 3b, 3c, and 3d, the fixed ram 22 is prevented from warping so as to protrude toward the base 21 side. Since the fixed mold 23 is fixed to the fixed ram 22, the fixed mold 23 is prevented from warping so as to protrude to the pedestal 21 side.

  Here, in the through holes 22a, 22b, 22c, and 22d, the elliptical bulge toward the center side of the fixed ram 22 causes the tie rods 3a, 3b, 3c, and 3d to bend at the time of press working, so that the center side of the fixed ram 22 It is preferable that it is larger than the movement trajectory of the tie rods 3a, 3b, 3c, 3d when projecting toward. When this elliptical bulge has such a preferable size, the tie rods 3a, 3b, 3c, 3d do not come into contact with the fixed ram 22, so that the through holes 22a, 22b, 22c, No force may be applied to the inner peripheral surface of 22d.

  On the other hand, on the same principle as the tie rod 3a in the through hole 22a, the movable ram 12 suppresses warping so as to protrude toward the top plate 11 side in order to release the force applied from the tie rod 3a. Since the movable mold 13 is fixed to the movable ram 12, the movable mold 13 is prevented from warping so as to protrude toward the top plate 11.

  Moreover, even if the tie rods 3b, 3c, and 3d are warped, forces applied to the inner peripheral surfaces of the through holes 12b, 12c, and 12d can be released, respectively.

  The movable ram 12 is restrained from warping so as to overhang the top plate 11 in order to release the force applied from the tie rods 3a, 3b, 3c, and 3d. Since the movable mold 13 is fixed to the movable ram 12, the movable mold 13 is prevented from warping so as to protrude toward the top plate 11.

  Here, in the through holes 12a, 12b, 12c, and 12d, the elliptical bulge toward the center side of the movable ram 12 is caused by the deflection of the tie rods 3a, 3b, 3c, and 3d during the press working, and the center side of the movable ram 12 It is preferable that it is larger than the movement trajectory of the tie rods 3a, 3b, 3c, 3d when projecting toward. When this elliptical bulge has such a preferable size, the tie rods 3a, 3b, 3c, 3d do not come into contact with the movable ram 12, so that the through holes 12a, 12b, 12c, No force may be applied to the inner peripheral surface of 12d.

  Therefore, when the movable mold 13 is pressed against the fixed mold 23 in order to prevent the movable mold 13 and the fixed mold 23 from warping, the molding surface 13a of the movable mold 13 and the molding surface 23a of the fixed mold 23 are in close contact with each other. Can do. Therefore, the work can be uniformly pressed by pressing the movable mold 13 against the fixed mold 23 after the work is sandwiched between the molding surface 13a and the molding surface 23a. Even if the tie rods 3a, 3b, 3c, and 3d having a reduced diameter are used, the work can be pressed uniformly. Therefore, the press apparatus 100 can be made compact by including the tie rods 3a, 3b, 3c, and 3d having a reduced diameter.

  As mentioned above, according to the column type press apparatus concerning Embodiment 1, a workpiece | work can be pressed uniformly.

  In addition, the column type pressing device according to the first embodiment includes the load receivers 6 a, 6 b, 6 c, and 6 d that support the fixed ram 22 and separate it from the pedestal 21. For this reason, the fixed ram 22 does not directly receive a force from the pedestal 21, so that the warpage of the fixed ram 22 can be suppressed. Therefore, it is possible to press the workpiece uniformly more reliably.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

100 Press device 12 Movable ram 12a, 12b, 12c, 12d Through hole 13 Movable type
22 fixed ram 22a, 22b, 22c, 22d through hole 23 fixed type
3a, 3b, 3c, 3d Tie rod

Claims (1)

Four tie rods,
First and second rams that are rectangular plate-like members into which the four tie rods are inserted, respectively, in through holes formed at four corners,
A movable mold fixed to the first ram;
A fixed die fixed to the second ram and disposed opposite the movable die,
A column-type pressing device that presses the first ram movable along the tie rod by moving toward the fixed second ram,
The through holes of the first and second rams are each formed to swell in an elliptical shape toward the ram center side.
Column type press machine.

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