JPS58167036A - Press machine - Google Patents

Abstract

PURPOSE:To facilitate correction of a die face by providing an inversing member near the lower pad and making it movable between the acting position where it is connected with a related part of an upper die and nonacting position where it retreats therefrom, and thereby inversing the upper die. CONSTITUTION:An upper pad 37 is provided in the lower face of a vertically movable slide 33 allowing rotation in a vertical plane. When fixing of upper pad 37 is released, the pad 37 rotates slowly to dangling position while being subjected to buffer action. Under this condition, a hydraulic cylinder 62 near the lower pad 23 operates, and the pad 37 is inverted by inversing members such as a guide cam 64a, a cam 46a etc. By this press machine, the upper die 38 is released facing upward, and the die face can be corrected easily.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a press machine used for testing and modifying molds.

Conventional technology In this type of press machine, which is installed above and below the mold, in order to easily modify the mold surfaces of both the upper and lower molds,
It is desirable to move the upper mold and the lower mold from their fixed positions so that the periphery of the mold surface is mMt**i. In this case, since the lower mold is supported by the lower pillow plate installed at the lower position, it is easy to move the lower mold to the open position by moving the lower pillow plate. In the case of the mold, it is supported by the upper pillow plate on a slide that is moved up and down at a position above the lower pillow plate, so it cannot be easily moved like the lower die.

Purpose This invention was made in order to eliminate these inconveniences, and its purpose is to hold the upper pillow plate supporting the upper mold in an inverted state during correction work on the upper mold surface. It is an object of the present invention to provide a new press machine that can easily perform mold surface correction work, and whose configuration does not interfere with mold matching work and trial pressing work of both upper and lower molds. .

EXAMPLE Hereinafter, an example embodying the present invention will be described based on the drawings. Reference numeral 21 denotes a machine base, and a pair of left and right supports 22 are erected and fixed on both sides thereof.

The upper plate of the machine base 21 is such that the lower pillow board 23 can move back and forth (the second
The lower mold 24 is mounted and fixed on the upper surface thereof as shown in FIG. 2 and FIGS. 5 to 7. As shown in Figure 2, the machine 2
A longitudinal drive hydraulic cylinder 25 is fixed to 1, and the lower pillow board 23 is moved longitudinally by the protrusion and retraction of the piston rod 25a. Further, as shown in FIGS. 1 and 4, a front position locking hydraulic cylinder 27 is arranged and fixed on the outside of each of the branch offices 22, and a support plate 28 is fixed to the piston rod 27a. Lock bins 29 are fixed to both ends of the support plate 28.

When the lower pillow board 23 is in the forward position between the two branches 22, the piston rod 27a protrudes.
The lock pin 29 fits into the hole 30 on the side surface of the lower pillow plate 23, and the lower pillow plate 23 is locked in the forward position.

As shown in FIG. 1, a bridge body 31 is fixed between the upper ends of both branches 22. A lifting hydraulic cylinder 32 is fixed to the bridge body 31 & this.

Note that a hydraulic drive unit (not shown) is provided on the upper surface of the bridge structure 31.

Above the lower pillow board 23, a slide 33 is arranged between the columns 22 so as to be movable up and down. The piston rod 32a of the lifting hydraulic cylinder 32 is connected to this slide 3.
3, and the slide 33 is moved up and down as the piston rod 32a moves in and out. As shown in FIG. 3, a pair of guide members 34 are provided on the inner surfaces of the five-car support columns 22, respectively, and a guide member 35 fixed to the slide 33 is in sliding contact with the guide members 34. Vertical movement is guided.

As shown in FIGS. 2 and 5 to 7, the slide 33
An upper pillow board 37 is rotatably supported in a vertical plane by a shaft 36 at the front end of the lower surface, and a pair of driven rollers 45 are provided at both ends of the upper pillow board 37, and an upper mold 38 is provided on the lower surface of the upper pillow board 37. As shown in FIGS. 1 and 3, a support tube 39 is integrally formed at the lower end of the rear surface of the slide 33, into which a connecting rod 40 is inserted.

A recess 40a is formed at the base end of the connecting rod 40. Connecting cylinders 41 and 42 are integrally formed on the lower end of the rear surface of the slide 33 and on the rear surface of the upper pillow plate 37, respectively, and as shown in FIG. When the connecting tubes 41 and 42 are placed in the closed position, the connecting tubes 41 and 42 are aligned, and the tip of the connecting rod 40 can be inserted into the connecting tubes 41 and 42, and the upper pillow plate 37 is in an upper horizontal position. is retained. Further, by extracting the connecting rod 40 from the connecting cylinder 42 of the upper pillow plate 31, the upper pillow plate 37 is rotated by its own weight to a slightly inclined hanging position as shown in FIG.

Further, as shown in FIG. 3, a locking hydraulic cylinder 43 is fixed to the rear surface of one of the pillars 22, and the connecting rod is attached to the tip of the piston rod 43a when the slide 33 reaches the top dead center position. A hook-shaped opening/closing piece 44 located in the recess 40a of the piston 40 is fixed, and at this time, the piston rod 43a moves in and out, thereby inserting and extracting the connecting rod 40 into and out of the connecting cylinders 41 and 42.

By the way, as shown in FIGS. 1 and 2, the machine stand 21
Cam plates 46 are fixed on both sides of the upper surface of the
As shown in FIGS. 5 to 7, the upper edge of this cam plate 46 has a cam portion 46a that has a gentle downward slope toward the front.
is formed.

Brackets 61 are fixed on the outer surfaces of both of these cam plates 46, respectively, and a guide hydraulic cylinder 62 is rotatably supported on each bracket 61. In addition, a pin 63 and a substantially doglegged guide plate 64 are rotatably supported at the upper rear end of both cam plates 46, and a guide cam portion 64a is formed on the upper edge of the guide plate 64, and a guide plate 64 is formed on the upper edge of the guide plate 64. A piston rod 62a of the guide hydraulic cylinder 62 is connected to the bent end portion 64b.

When the guide hydraulic cylinder 62 is not in operation, this guide plate 64 is held in a substantially horizontal inactive position as shown in FIG. 5, while when the guide hydraulic cylinder 62 is in operation it is held in an upward position as shown in FIG. The guide plate 64 is rotated upright and is placed in an operating position where the guide cam portion 64a of the guide plate 64 abuts against the driven roller 45 of the upper pillow plate 37 in the hanging position. In the operating position, the guide cam portion 64a and the cam portion 48a of the cam plate 46 are continuous on substantially the same straight line.

On the other hand, as shown in FIGS. 5 to 7', a first link 48 is rotatably supported on both sides of the slide 33 by shafts 47 at approximately the center, and an upper pillow plate 3
7, a second link 50 is rotatably supported at one end by a shaft 49, and the other end is rotatably connected to one end of the first link 48.

Further, an opening/closing hydraulic cylinder 53 is supported at the upper end by a shaft 52 via a bracket 51 at the upper front side of both branches 22, and a receiving piece 5 is attached to the lower end of the piston rod 53a.
4 is fixed, and the four parts of the receiving piece 54 are connected to the second
It is possible to engage with a bin 55 provided at the other end of the link 50.

As shown in FIG. 5, when the slide 33 is at the top dead center position, the first link 48 rotates in the direction of arrow Q as the upper pillow board 37 rotates downward from the upper horizontal position. As a result, the piston rod 53a is pushed up. At this time of pushing up, the opening/closing hydraulic cylinder 53 acts as a shock absorber, whereby the upper pillow plate 37 is prevented from rotating suddenly and rotates slowly. Furthermore, when the upper pillow board 37 is in the hanging position shown in FIG. The upper pillow plate 31 is pulled up to an upper horizontal position via the upper pillow board 31.

Next, the operation of the press configured as above will be explained. Now, in FIGS. 1, 2, and 5, the upper pillow plate 37 is arranged in an upper horizontal position, the piston rod 43a of the locking hydraulic cylinder 43 protrudes, and the slide 33 and the upper pillow plate 37 are connected by the connecting rod 40. are in a combined state.

Therefore, in this state, if the piston rod 32a of the lifting drive hydraulic cylinder 32 is moved up and down to move the slide 33 up and down, the upper mold 3 and the lower mold 24 will overlap and separate, and the mold of the mold in the manufacturing process will be Can perform fitting work and product trial pressing work.

Next, as a result of these inspections, if an abnormality or an inconvenient part in terms of accuracy is found on the upper mold surface (in this case, the mold surface is corrected by operating as described below). After the locking hydraulic cylinder 53 is activated and the receiving piece 54 stops the bottle 55 of the first link 48, if the locking hydraulic cylinder 43 is activated and the piston rod 43a is retracted, the connecting rod 40 is pulled out from the connecting cylinder 42 of the upper pillow plate 37, and its fixation to the upper pillow plate 37 is released.Therefore, the upper pillow plate 37 in the state shown in FIG. It slowly rotates under its own weight to the hanging position shown in Figure 6.At this time,
The upper pillow plate 37 is stopped in a state slightly inclined inward due to the weight of the upper mold 38.

When the guide hydraulic cylinder 62 is operated in this state,
The guide plate 64 is rotated upright to the operating position, and the guide cam portion 64a and the cam portion 46a of the cam plate 46 are connected to each other. Therefore, the driven roller 45 does not operate the lifting drive hydraulic cylinder 32 to lower the slide 33, and the driven roller 45 descends on the guide cam portion 64a and moves to the cam portion 46a.
After being guided to the side, it rolls downward on the cam portion 46a.

Therefore, as shown in FIG. 7, the upper pillow plate 37 is rotated inverted, and the upper mold 38 attached to the lower surface of the upper pillow plate 37 is completely facing upward in a position where it is opened outward from between the two branches 22. Therefore, it is possible to easily correct the mold surface. Further, after the upper pillow plate 37 is reversed, the piston rod 62a is retracted and the guide plate 64 returns to its original position.

Note that as shown in FIG. 7, the slide 33 is lowered to the first position.
When the link 48 moves downward, the opening/closing hydraulic cylinder 53
The piston rod 53a is connected to the receiving piece 54 and the first link 48.
Since the engagement with the bin 55 is released, the first link 4
It does not follow the downward movement of 8.

After the correction work described above is completed, the slide 33 is raised to the top dead center position, and then the piston rod 53a is placed in the protruding state shown in FIG. 2. Therefore, after the upper pillow plate 37 is moved from the upward position shown in FIG. 7 to the hanging position shown in FIG. 6, it is moved to the upper horizontal position shown in FIG. Therefore, in this state, if the connecting rod 40 is moved to the left in FIG. 1 by the locking hydraulic cylinder 43, the upper pillow plate 37 can be fixed in the upper horizontal position.

In addition, after the upper pillow plate 37 is reversely rotated, the second guide plate 64 is rotated back to the inactive position as shown in FIG. There is no risk of interfering with the vertical movement of the slide 33 during the mold matching work and the product trial pressing work in step 24.

When modifying the mold surface of the lower mold 24, the longitudinal motion drive hydraulic cylinder 25 is operated to move the lower pillow board 23.
move backwards. In this way, the lower mold 24 will be placed at both branches 22rp'! Since it is placed in a position that is open to the outside, work can be done easily.

The present invention is not limited to the above-mentioned embodiments, but can be embodied by, for example, configuring the reversing member as follows. That is, in the example shown in FIG. 8, a guide hydraulic cylinder 57 is rotatably provided on a bracket 56 fixed to the machine base 21, and a guide cam portion is provided on the upper edge of the rear end of the cam plate 46. A guide plate 58 having a guide plate 58a is rotatably supported, and a guide hydraulic cylinder 5 is installed in the center of the guide plate 58.
7 piston rods 57a are connected. Then, the guide hydraulic cylinder 57 is operated and the piston rod 57a
When the guide plate 58 is projected, the guide plate 58 is rotated upright, and the guide cam portion 58a and the cam portion 46a of the cam plate 46 are continuous on substantially the same straight line. Further, when the piston rod 57a is retracted, its guide plate 58 is rotated back to a substantially horizontal state as shown by the chain line in the figure.

In addition, although not shown, a cam plate without the guide plate of each of the above embodiments may be provided as a reversing member, and this cam plate may be configured to be movable in the front and back direction, or the upper This invention can be embodied by arbitrarily changing the structure and shape of each part without departing from the spirit of the invention, such as by providing an appropriate reversing means for forcibly reversing the pillow board.

Effects As detailed above, in this invention, as the upper pillow plate in the hanging position is lowered near the lower pillow plate, the upper pillow plate engages with a part of the upper pillow plate to invert the upper pillow plate. The upper pillow supporting the upper mold is provided with a reversing member and is movable between an active position where the reversing member engages with a part of the upper pillow board and an inactive position where it retreats from there. By holding the plate in an inverted state, it is possible to easily perform work such as correction of the mold surface, and the configuration for this purpose does not interfere with the mold matching work of the upper and lower molds and the trial pressing work. It has the excellent effect of being able to

[Brief explanation of the drawing]

The drawings show a press machine embodying the present invention; FIG. 1 is a rear view, FIG. 2 is a partially cutaway side view, FIG. 3 is a plan sectional view mainly showing the top surface of the slide, and FIG. Figure 4 is a cross-sectional plan view showing the locking mechanism of the upper pillow board. 5 to 7 are sectional views showing the operating state of the main parts, and FIG. 8 is a sectional view showing a separate part of the present invention. Lower pillow plate 23, lower mold 24, slide 33, upper pillow plate 37, upper mold 38, cam plate 46, hydraulic cylinder 62 for guiding cam part 46a5, guide plate 64, guide cam part 64a0 Patent applicant Nagase Co., Ltd. ironworks agent
Patent attorney Hironobu Onda

Claims (1)

[Scope of Claims] 1. A machine stand, a lower pillow plate on which the lower mold is placed, a slide that moves up and down above the lower pillow plate, and a slide that can rotate in a vertical plane on the lower surface of the slide. In a press machine, the press machine is provided with an upper pillow plate to which an upper mold is attached, and the upper pillow plate can be rotated by its own weight to a hanging position. When a reversing member is provided that engages with a part of the upper pillow board and inverts the upper pillow board as the pillow board descends, the working position where the reversing member engages with a part of the upper pillow board is provided. and a non-working position from which the press is evacuated. 2. The press machine according to claim 1, wherein the reversing member is a cam plate mounted on a machine base. 8. The reversing member consists of a cam plate fixed to the machine base and a guide plate connected to the upper part of one side of the cam plate, and this guide plate is rotatable between the operating position and the non-operating position. A press machine according to claim 1. 4. The press machine according to claim 3, wherein the guide plate is operated by a cam plate or a guide cylinder mounted on the machine stand.