JPH05200455A - Device for inverting die set of press, etc. - Google Patents

Abstract

PURPOSE:To vertically hang up the upper die of a die set having unbalance in the center of gravity and to safely invert it. CONSTITUTION:A rotary frame 2 is supported freely rotatably on sides of a frame 1. Width changing frames 21 are inserted respectively between inner faces of opposite two sides of the rotary frame. The two width changing frames can be moved separately horizontally. For example, four attachments 22 are set on inner faces of the width changing frames. Both the attachments and hanging rods of a die set are prepared and positioned while taking balance with respect to center of gravity of each die set so that a hanging rod of the die set is fitted into the attachment. In this way, though each of the die sets has the respective unbalanced center of gravity, the rotary frame is engaged with the upper die of the die set at a position while keeping respective balance and the upper die is hung up without oscillation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mounting upper and lower dies used in a press or the like and separating and reversing an upper die of a die set which is fitted vertically.

[0002]

2. Description of the Related Art The upper and lower molds used for a press or the like are sometimes directly attached to the main body of the press. However, when a single mold is not used at all times, a die set can be easily replaced. The die set is often attached to the press after the die is attached to the die (also called the die holder).
FIG. 6 shows a state in which the upper and lower parts of the die set 4 are separated, and the upper die 4A and the lower die 4B are preliminarily attached with the upper die MA and the lower die MB of the press die, respectively. Needless to say, upper mold M
Since A and the lower mold MB need to have a matching relationship to form a perfectly matched unevenness, the upper mold 4A and the lower mold 4B of the die set.
It is required to have accuracy without rattling even when mating with.
Therefore, the guide post (female) 42 is projected vertically downward on the upper mold 4A, and the guide post (male) 43 is projected upward on the lower mold 4B at the same position. Achieves high die set vertical fitting. Also, on the outer sides of the upper die and lower die of the die set,
A pair (usually four pieces each) of the hanging trunks 41 are provided to project, and a wire engaged with a hook of a crane or a hoist, or a hanging tool such as a chain is wound, and is used for lifting or reversing.

[0003]

A large die set weighs several tons, and the slinging work is always dangerous. In order to replace the press die, only the upper die 4A of the die set must first be lifted to divide it into upper and lower portions, and then the upper die must be inverted. In the case of a die set, as can be understood from FIG. 6, the guide post is projected downward or upward, and the vicinity of the center of the fitting surface is occupied by the press die, so the position where the guide post is erected is set. Is often out of the center, which is at least symmetrical to the front and back. If the upper die set die 4A is attempted to be vertically lifted up in such an asymmetrical unstable positional relationship, the load is always unevenly applied between the male and female guide posts, and it cannot be easily pulled out. Forcibly pulling it out unevenly will cause seizure, degrading the accuracy of the guide post and defeating the purpose of using the guide post.

The same applies when reversing the upper die set upper die 4A, in which the wire is attached to the suspension trunk of the die set whose center of gravity is usually biased to the front or back or to the left and right, and manually operated to invert it. There is no choice but to say that it is dangerous work without depending on the skill of skilled workers. That is, it is natural that the entire moment when the upper die 4A is lifted and the guide post is disengaged, the whole tilts greatly, and when the upper half 4A flips over, the rocking tilts greatly again. is there.

In practice, avoiding this dangerous inversion, the upper mold 4A
It is still hanging while being suspended in the hollow with a crane, and the worker enters underneath it to carry out the necessary steps such as punch exchange, and is often silent about the work method prohibited for safety. SUMMARY OF THE INVENTION In order to solve the problems described above, an object of the present invention is to provide a device in which the upper die of a die set having an eccentric center of gravity can be safely and reliably lifted and separated into a lower die, and safely inverted.

[0006]

DISCLOSURE OF THE INVENTION In a die set reversing device such as a press according to the present invention, a rotary frame 2 is rotatably engaged with an opening of a U-shaped frame 1 so that the rotary frame 2 faces each other. The width adjustment frames 21 that can independently move horizontally inside the two sides are respectively fitted inside, and a plurality of suspension trunks 41 projecting to the outer side of the die set 4 are fitted inside the width adjustment frames 21 in the same number. The above-mentioned problem was solved by attaching the attachment 22 detachably and by providing the suspending engaging member 11 at the center of the top side in the direction opposite to the opening of the frame 1 in a protruding manner. Alternatively, instead of the frame 1, a pair of hollow rectangular columns 5 are erected so as to face each other, and rams 6 that can be raised and lowered are fitted in the hollow portions of both columns 5, and the rotary frame 2 is rotated between the rams 6. It may be freely engaged.

[0007]

The die set 4 is taken out of the press with the upper and lower parts fitted to each other, and placed on the traveling carriage, for example. The rotating frame 2 is adjusted to the position of the die set upper die 4A by operating the crane or hoist that suspends the engaging member 11 at the center of the top side of the frame 1 of the die set reversing device of the present invention. Attachment 2 protruding from the inner surface of the width-shifting frame 21
When the position of 2 and the position of the upper trunk 41 are aligned, the width-shifting frame 21 is horizontally moved from the left and right toward the inside, and all the hanging trunks 41 are fitted into the opposing attachments 22. When the frame is lifted with a cleanser or the like through the engaging member 11 after being sufficiently fitted, the frame holds only the upper mold 4A and ascends to be separated from the lower mold 4B. When the upper mold is completely separated and lifted to the free space and the upper mold is stationary, the upper mold is gently inverted and the fitting surface is changed upward by rotating the rotating frame within the frame, so move to another position as it is. Then just hang it.

A major feature of operation is that a lifting posture that is most suitable for the position of the center of gravity that differs for each die set can be selected. FIG. 1 is a perspective view showing one embodiment of the present invention. Since the width-shifting frames 21A and 21B fitted in the left and right of the rotary frame 2 can individually move horizontally, the upper mold eccentric in the left-right direction. It is possible to absorb this eccentricity by moving it to different sides to different positions. Regarding the eccentricity with respect to the front-rear direction, the positions of the attachment 22 and the suspension trunk 41 facing the attachment 22 may be attached in an unbalanced manner in the front-rear direction. Alternatively, as described in a later example, the core of the engagement hole 23 of the attachment into which the suspension trunk 41 is fitted may be eccentric in the front-rear direction. In any case, since there are not so many types of die set 4, the combination of the hanging trunk and the attachment suitable for the position of the center of gravity peculiar to each die set is determined, and the mounting position and the moving position of the width adjustment frame are also specified. Then, if you keep a record, you can guarantee the lifting work for all the die sets with unbalanced center of gravity.

When the column 5 and the ram 6 are combined in place of the frame 1, hollow rectangular columns are erected so as to face each other, as shown in FIG. 4, to form a kind of gate-shaped four pillars. Since the rotary frame 2 is supported in the ram, the constraint force against the frame is strong, and even if the center of gravity of the die set is slightly deviated, it is forcibly gripped and vertically lifted by the action of the ram 6. In this respect, an action which is simpler and more productive than the above-mentioned examples is exhibited.

[0010]

Embodiments of the present invention will be described while avoiding the duplication of the preceding paragraph. FIG. 1 is a perspective view showing a first embodiment, in which a motor 12, a speed reducer 13, and a pinion 14 are provided on the side of the frame 1.
A gear 24 rotatably supported to the side of the rotary frame 2 via
Meshes with. The rotation of the motor 12 is a drive source that decelerates the rotation of the rotary frame 2, and this relationship is accurately shown in FIG.

In order to move the width-adjusting frame 21 fitted in the rotary frame 2 horizontally, the screw 2 is moved as shown in detail in FIG.
5 are individually rotated by the handle 26. To move the width-adjustment frame while keeping it parallel to the side of the rotation frame,
The rotation of the steering wheel is transmitted to the rear through the sprocket 27 and the chain 28, respectively, so that the steering wheel can move forward and backward simultaneously at the same speed.

As shown in FIGS. 2 and 3, the engagement hole 23 of the attachment 22 attached to the width-shifting frame 21 is not necessarily drilled at the center of the attachment, but is eccentric vertically (X direction) and front and rear (Y direction). A hole core is provided at the position. This follows a combination specified in advance so as to match the center of gravity of the asymmetrically distributed die set and maintain balance during lifting. Further, as shown in FIG. 1, a scale 29 is attached in the moving direction of the width-adjusting frame to control the moving amount to a preset amount, or the counterbalance 30 is rotated in the front-back direction by rotating a screw (not shown). Moving to balance the center of gravity is also a preferred embodiment.

FIG. 4 and FIG. 5 show a second embodiment, which is different in that the rotary frame can be moved up and down by itself without the operation of a crane or hoist. As illustrated in FIG. 5, the driving principle is provided with a motor 51 and a speed reducer 52 at the center of the upper apex of the column 5, and the rotation of the motor is built in the side of the column via a speed reducer 53 provided at the top side end. The speed is transmitted to the vertically oriented screw 54. The ram 6 held between the sides of the column
Female screws engraved in the engaging portions 61 at both ends mesh with the screw 54, and the ram 6 moves up and down as the screw rotates.
The ram 6 is provided with a pinion 62 inward, and the gear 2 of the rotary frame 2 is provided.
4, the rotary frame can be inverted around the shaft center 63.

[0014]

As described above, in the die set reversing device according to the present invention, the die set upper die having an unbalanced center of gravity is easily lifted in the vertical direction and separated from the fitted lower die. You can safely and safely invert and proceed to the next step. Therefore, not only can work safety be dramatically improved, but workability can be greatly improved, which can be expected to make a significant contribution to improving production efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing a part of the same example.

FIG. 3 is a cross-sectional plan view showing another part of the same example.

FIG. 4 is a perspective view showing a second embodiment of the present invention.

FIG. 5 is a vertical sectional side view showing a part of the same example.

FIG. 6 is a perspective view showing an upper die and a lower die of the die set.

[Explanation of symbols]

 1 frame 2 rotating frame 4 die set 5 column 6 ram 21 width-adjusting frame 22 attachment 41 suspension trunk

Claims (2)

[Claims] 1. A device for separating and reversing an upper die of a die set which is fitted with upper and lower dies used for a press or the like and which is fitted vertically, wherein a rotary frame 2 is rotatable to an opening portion of a U-shaped frame 1. To the inside of the two sides of the rotary frame 2 that can independently move horizontally, and the insides of the width-adjusting frames 21 project inside the width-adjusting frames 21 to the outer sides of the die set 4. The same number of attachments 22 into which a plurality of hanging trunks 41 can be fitted.
A detachable die set reversing device such as a press, characterized in that the lifting engagement member 11 is provided at the center of the top side in the direction opposite to the opening of the frame 1 in a detachable manner. 2. In the claim, a pair of hollow rectangular columns 5 instead of the frame 1 are erected so as to face each other, and rams 6 that can move up and down are fitted in the hollow portions of both columns 5, respectively. A die set reversing device such as a press characterized in that the rotary frame 2 is rotatably engaged between them.