JP3751210B2 - Beam vertical drive mechanism in transfer device of forging press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a beam vertical drive mechanism in a transfer device of a forging press.
[0002]
[Prior art]
For example, the forging press A with transfer device will be described with reference to FIG. 1 and FIG. 2. Each press position P ₁ , P ₂ , P ₃ , P ₄ , P ₅ is determined on the lower die Q, and the transfer is performed. By repeating the operation of gripping the workpiece a with the fingers b of the beam F moving up and down, left and right and back and forth of the apparatus B and the separating operation, the workpiece a is sequentially moved to each press position P _1. Move and press work. At this time, the workpiece a is supplied to the press position P ₁ or the front position P ₀ , and the press-completed product is carried out (dispensed) from the press position P ₅ . The unloading is transferred to a conveyor by an appropriate means and transferred to a required position.
[0003]
The transfer device B in this type of forging press A is provided with frame casings G at both ends of the forging press A, and the pair of front and rear beams F and F are passed between the frame casings G and G. It is general that the beams F and F are moved in the vertical direction (Z direction), the front-rear direction (Y direction), and the left-right direction (X direction), that is, three-dimensionally, by driving means provided in the frame casing G. .
[0004]
The workpiece a is moved in and out of the lower mold Q by the vertical movement of the beam F (lift / down operation), and the finger b is moved close to and separated by the longitudinal movement of both beams F and F. The workpiece a is clamped or released (clamping / unclamping operation), and the workpiece F is moved back to the next process by the movement of the beam F in the horizontal direction (advance / return operation).
[0005]
As a mechanism for moving the beam F in the XYZ triaxial directions, as shown in FIG. 6, a vertically moving frame 10 is attached to a frame casing G via a guide 11, and this frame 10 is attached to a ball screw 13a and a servo motor 12 by a servo motor 12. The frame 10 is provided with a ball screw 15 driven by a servo motor 14 via a screw bearing (ball nut) 13b, and a support arm 17 for the beam F is provided on the ball screw 15 via a ball nut 16. There is a configuration that can move.
[0006]
In this configuration and the like, the vertical drive mechanism of the beams F and F is conventionally shown in Japanese Patent Application Laid-Open No. 11-192531, etc., and as shown in FIG. 7, in order to obtain the vertical vertical movement with high accuracy of the lift frame 10, In general, the ball screw 13a is attached to the frame casing G with upper and lower bearings 18a and 18b, and the upper end thereof is connected to the servo motor 12 through a coupling 19.
[0007]
[Problems to be solved by the invention]
In the conventional beam vertical drive mechanism, when the ball screw 13a portion is disassembled, the coupling 19 is removed, the servo motor 12 is pulled away from the ball screw 13a and pulled upward, and the bearings of the vertical bearings 18a and 18b and the screw bearing 13b. Etc., the ball screw 13a is pulled upward. This upward pulling is complicated, and if there is an obstacle above it, the number of man-hours for removing the obstacle will increase and it will become more complicated.
[0008]
Further, the upper bearing 18a is attached to a horizontal support plate 18 provided in a spanning manner in the middle of the work window P of the frame casing G with lateral support. For this reason, it is difficult to see the upper bearing 18a from the work window P, and its inspection and repair are complicated. Further, in the horizontal support, it is difficult to align the upper bearing 18a with the other bearing 18b and the screw bearing 13b.
[0009]
This invention makes it a subject to improve workability | operativity of inspection and repair of an upper bearing in view of the said situation.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention first has a halved structure for the upper bearing. This is because if the structure is halved, the bearing can be disassembled first, so that inspection, repair, and disassembly can be performed without pulling out the ball screw from the bearing.
[0011]
Next, according to the present invention, the upper bearing is attached to the upper plate of the frame casing to which the servo motor is attached via a support plate. If it is attached to the upper plate, even if the working window is formed in the frame casing along the ball screw, it is not necessary to provide the upper bearing mounting lateral plate in the window as in the conventional case, and the working window is attached to the ball screw. It can be made large enough to be seen, and there is no obstruction, and inspection, repair, installation, and disassembly of the ball screw and the like can be performed through the work window. It is also easy to center.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
As an embodiment of the present invention, a pair of beams along a row direction in a plurality of press positions in series are moved up and down, left and right, and front and back, and an operation of sandwiching a workpiece by a finger of the beam and an operation of separating the workpiece. In the mechanism for moving the beam back and forth in the transfer device of the forging press machine that moves the workpiece to the respective press positions in order, the vertical ball screw is moved up and down in the frame casing. The ball screw in the direction is supported by the upper and lower bearings fixed to the frame casing, the ball screw is supported by the upper and lower bearings fixed to the frame casing, and the upper end of the ball screw is fixed to the upper plate of the frame casing. It is connected to the motor, and a frame for moving the beam up and down is attached to the ball screw via a ball nut. Only, and may be adopted a configuration in which the upper bearing and half structure.
[0013]
In this structure, the upper bearing is fixed to a support plate extending downward from the upper plate of the frame casing, the lower bearing is fixed to the lower plate of the frame casing, and the side surface of the frame casing along the ball screw In the configuration, a work window may be formed. At this time, if the removable half part of the upper bearing is directed to the work window side, it can be removed from the window side.
[0014]
【Example】
An embodiment is shown in FIGS. 1 to 5, and a forging press A with a transfer device B according to this embodiment has five upper and lower dies P _{1 to} P ₅ and Q _{1 to} Q ₅ as described above. By repeating the operation of sandwiching the workpiece (billet) a with the finger b of the beam F moving up and down, left and right and back and forth of the transfer feed device B, and separating the workpiece a, the workpiece a is moved to each mold P ₁ , Q ₁ ..., P ₅ and Q ₅ are sequentially transferred to perform press working. Hereinafter, the lowering positions of the upper molds P _{1 to} P ₅ are indicated as P _{1 to} P ₅ with the press (process) positions being set.
[0015]
At the time of this pressing, the billet a from the induction heater is sent to the front position P ₀ of the forging press A corresponding to the pressing operation by a billet supply device (not shown), and the billet a is transferred to each press position by the transfer device B. sent in sequence to P ₁ to P _5, it is a product. In other words, the billet a at the front position P ₀ has a smoothing process at the first press position P ₁ , a rough finishing process at the second press position P ₂ , a forming process at the third press position P ₃ , and a precision at the fourth press position P ₄ . finishing, simultaneous punching of the inside and outside of Bali is made in the fifth press position P _5.
[0016]
In the transfer device B, a frame casing G is provided on each of the left and right columns H of the forging press A, and a pair of beams F and F are passed between the frame casings G and G. The beams F and F are moved forward and backward, up and down by a clamping / unclamping operation mechanism (back and forth movement mechanism), a lift / down operation mechanism (up and down movement mechanism) and an advance / return operation mechanism (left and right movement mechanism) in the frame casing G. Moved left and right. The frame casings G on both sides have the same configuration except for the advance / return operation mechanism.
[0017]
As the clamp / unclamp operation mechanism and the advance / return operation mechanism, well-known and publicly known ones described in the publications 1 and 2 and JP-A 2000-246378 are employed. In this embodiment, The lift / down operation mechanism is unique.
[0018]
3 to 5, the lower end of the ball screw 21 is supported by the lower bearing 22 fixed to the lower plate 20a of the frame casing G, and the upper end thereof is supported by the upper bearing 23. Via a coupling 24, the frame casing G is connected to a vertical movement (lift) servomotor 25 fixed to an upper plate (top plate) 20 b of the frame casing G. The lift frame 10 of the beam F is attached to the ball screw 21 via a ball nut type slider 26. When the ball screw 21 rotates, the lift frame 10 moves up and down, and the beam F also moves up and down. . At this time, the lift frame 10 moves up and down without rotating by a mechanism such as the guide 11 described above. As shown in FIG. 5, the slider 26 has a half cap 26 a, and the ball screw 21 can be separated from the lift frame 10 by removing the half cap 26 a.
[0019]
The upper bearing 23 has a half structure, and one half 23a of the upper bearing 23 is fixed to a support plate 27 extending downward from the upper plate 20b to which the servo motor 25 is attached. As shown in FIG. 5, the upper bearing 23 has a cap 23a and a bearing retainer plate 23b divided in half, and the collar retainer nut 23c, the upper and lower collars 23d, and the lower bearing retainer plate 23e remain annular. For this reason, the ball screw 21 is separated from the upper bearing portion by removing the half cap 23a and the half retainer plate 23b and removing the bolt of the lower retainer plate 23e. Therefore, if the coupling 24 is removed and the bearing cap 26a of the slider 26 is removed, the ball screw 21 can be pulled out from the lower bearing 22 and replaced. In the figure, c is a fastening bolt, and an appropriate number is used for each component.
[0020]
A work window P is formed on the side surface of the frame casing G so as to extend almost to the length of the ball screw 21, and a cap 26 a of the slider 26 and a removable cap 23 a of the upper bearing 23 are opposed to the work window P. . Therefore, by removing the caps 23a and 26a from the work window P, the ball screw 21 is separated from the lift frame 10 and the support plate 27, and the ball screw 21 can be inspected, repaired, and disassembled. In the figure, reference numeral 30 denotes a buffering air spring provided between the frame casing lower plate 20 a and the lift frame 10.
[0021]
【The invention's effect】
As described above, since the upper bearing has a halved structure as described above, it is easy to inspect and repair the ball screw. Further, by supporting the upper bearing from above, the work becomes easier. Centering between the bearings is also easy.
[Brief description of the drawings]
FIG. 1 is a schematic partially cut plan view of a forging press with transfer device according to one embodiment. FIG. 2 is a partially cut front view of the same. FIG. FIG. 5 is an exploded perspective view of the main part of the same embodiment. FIG. 6 is a schematic perspective view of the main part of the transfer device. FIG. 7 is a front view of the main part of the conventional example. ]
A Forging press B Transfer device F Beam G Frame casing P ₁ , P ₂ , P ₃ , P ₄ , P ₅ Press position a Work piece b Finger 10 Lift frame (vertical moving frame)
11 Frame lifting / lowering guide 20a Frame casing lower plate 20b Frame casing upper plate 21 Ball screw 22 Lower bearing 23 Upper bearing 23a Upper bearing half cap 24 Coupling 25 Servo motor 26 Ball nut type slider 26a Half of ball nut type slider Split cap 27 Upper bearing support plate

Claims (1)

A pair of beams F and F along the row direction of a plurality of press positions P ₁ , P ₂ , P ₃ , P ₄ , and P ₅ in series are moved up and down, left and right, and back and forth. In the mechanism for moving the beam F back and forth in the transfer device B of the forging press A that moves the workpiece a sequentially to the respective press positions by repeating the operation of sandwiching the workpiece a and the separating operation. In the beam vertical drive device,
A vertical ball screw 21 is supported on the frame casing G by upper and lower bearings 22 and 23 fixed to the frame casing G, and an upper end of the ball screw 21 is fixed to a servo motor 25 fixed to the upper plate 20b of the frame casing G. The frame 10 is vertically attached to the ball screw 21 via a ball nut 26 and the upper bearing 23 has a half structure.
Further, the upper bearing 23 is fixed to a support plate 27 extending downward from the upper plate 20 b of the frame casing G, the lower bearing 22 is fixed to the lower plate 20 a of the frame casing G, and the ball screw 21. A beam vertical drive mechanism in a transfer device of a forging press machine, characterized in that a work window P is formed on a side surface of the frame casing G along the line.

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