JP7367965B2 - Magnetic clamp with floating function and die spotting press with magnetic clamp - Google Patents

Description

The present invention relates to a magnetic clamp with a floating function and a die spotting press equipped with the magnetic clamp.

There is a mold coupling device described in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2019-34339) that is used for mold matching work of press molds etc. consisting of an upper mold and a lower mold. This mold joining device had an "XY plane free movement means" in the lower mold mounting section that allows the lower mold to move freely in a horizontal plane with respect to the fixed upper mold.

As a die spotting press used for correction work and trial work of upper and lower molds, there is one described in Patent Document 2 (Japanese Unexamined Patent Publication No. 2001-129695). A technique for performing the mold matching work using such a die spotting press is described in paragraph "0095" of the above-mentioned Patent Document 1.

Moreover, "FIG. 8" of Patent Document 1 discloses a magnetic clamp as a clamp device for fixing the upper die.

As a magnetic clamp, there is also disclosed a double magnetic clamp that has magnetic units on both sides: a surface for clamping a workpiece such as a mold, and a surface for fixing to a base (table) (see "FIG. 11" of Patent Document 3).

There is also a die spotting press in which the upper mold and the lower mold are clamped using magnetic clamps on the slide for fixing the upper mold and the table for placing the lower mold.

JP 2019-34339 Publication Japanese Patent Application Publication No. 2001-129695 Japanese Patent Application Publication No. 2012-148378

When trying to perform mold matching work in addition to mold correction work and trial work with the die spotting press using the magnetic clamp, the "XY plane free movement means" as described in Patent Document 1 is It must be provided separately on the top side of the magnetic clamp on the mold placement table.
However, separately providing the "XY plane free movement means" increases the cost.

Therefore, an object of the present invention is to enable mold matching work to be performed at low cost in a die spotting press using a magnetic clamp, without providing a separate "XY plane free movement means". .

In order to achieve the above object, the present invention has taken the following measures. That is, the magnetic clamp with a floating function of the present invention is a magnetic clamp used on a table on which the lower mold is placed of a mold coupling device used for mold matching work such as a press mold consisting of an upper mold and a lower mold. The body includes a body having an upper surface on which the lower mold is placed and a lower surface on which the lower mold is placed, and the body includes a magnet unit that attracts the lower mold , and an opening in at least one of the upper and lower surfaces. An air chamber is provided, and a bottom plate is arranged that closes the air chamber and comes into contact with the lower mold or the table, and pressurized air is supplied to the air chamber so that the bottom plate is removed from the body. The lower mold is detached and floats relative to the table, so that the lower mold is movable in a horizontal plane .

Preferably, the body is provided with a magnet unit that attracts the table.

The die spotting press of the present invention includes a slide on which the upper mold of the mold is attached and is movable up and down and reversible, and a table on which the lower mold of the mold is placed and can be moved laterally from directly below the slide, The table is equipped with the floating magnetic clamp.

According to the present invention, since the magnetic clamp has a floating function, there is no need to separately provide the conventional "XY plane free movement means", and the cost is reduced.

FIG. 1 is a front view showing an embodiment of a die spotting press of the present invention. FIG. 2 is a side view of FIG. 1; FIG. 1 is a perspective view showing an embodiment of a magnetic clamp with a floating function of the present invention. FIG. 4 is a front view of FIG. 3; Top view of a magnetic clamp with floating function. A sectional view taken along the line AA in FIG. 5. FIG. 3 is a sectional view showing another embodiment of the magnetic clamp with floating function of the present invention.

Embodiments of the present invention will be described below based on the drawings.
What is shown in FIGS. 1 and 2 is a die spotting press according to an embodiment of the present invention. The die spotting press has a bed 1 and a gate-shaped frame 2 provided so as to straddle the bed 1. A slide 3 is provided on a gate-shaped frame 2 so as to be movable in the vertical direction. A known magnetic clamp 4 is fixed to the lower surface of the slide 3 via a fixing device (not shown). An upper die (not shown) of the mold is fixed to the magnetic clamp 4 by suction.

In the present invention, it is not essential to attach the magnetic clamp 4 to the slide 3, and the upper die may be directly clamped to the lower surface of the slide 3.

The slide 3 is rotatably provided around a horizontal axis, with the front side in the front view of FIG. 1 serving as a fulcrum. That is, the slide 3 rotates 90 degrees around the front fulcrum so that the rear side hangs downward, and the lower end of the slide 3 approaches the bed 1. Further, the slide 3 is rotated 90 degrees and reversed so that the lower surface of the slide 3 faces upward. In this second half rotation of 90 degrees, the slide 3 rotates while descending. The slide 3 is placed on the bed 1 in a 180 degree inverted state. In this state, the magnetic clamp 4 fixed to the slide 3 is located on the top surface of the slide 3.

As shown in FIG. 2, the bed 1 protrudes outward from within the portal frame 2 when viewed from the side. A table 5 is provided on the bed 1 so as to be movable outward from inside the gate-shaped frame 2.

A magnetic clamp 6 with a floating function according to an embodiment of the present invention is placed on the table 5. This magnetic clamp 6 is a double magnetic clamp in which attractive force acts on the upper and lower surfaces. The lower die (not shown) of the mold can be fixed to this double magnetic clamp by suction.

Note that, in the present invention, a double magnet is not essential, and a single magnet that applies adsorption force only to the top surface may be used.

What is shown in FIGS. 3 to 6 are details of a magnetic clamp 6 with a floating function according to an embodiment of the present invention. Although the upper die 7 is directly clamped to the lower surface of the slide 3 in FIGS. 3 and 4, the upper die 7 may be clamped via the magnetic clamp 4 shown in FIG. 1.

The magnetic clamp 6 with a floating function is placed on the table 5 of the die spotting press. A T-slot 8 is provided on the top surface of the table 5. A bottom plate 9 is fixed to the top surface of the table 5 so as to close this T-slot 8. The upper surface of the bottom plate 9 is a flat surface. A lower mold 10, which is a workpiece, is placed on this magnetic clamp 6 with a floating function.

The magnetic clamp 6 with a floating function has a body 11. The body 11 has an upper surface on which a lower mold 10 as a workpiece is placed, and a lower surface on which the table 5 is placed. The body 11 is a thin rectangular parallelepiped. The upper surface and the lower surface are formed into planes parallel to each other and serve as suction surfaces.

A magnet unit 12 for attracting the workpiece 10 is built into the body 11 on the upper surface side. A magnet unit 12 is also built in on the lower surface side of the body 11, and in this embodiment, it is a double magnet clamp. Note that the magnet unit 12 is a well-known device as shown in the above-mentioned patent document, so a description thereof will be omitted.

The body 11 is provided with an air chamber 13 that opens on the lower surface. The air chambers 13 are provided at one or more evenly spaced positions on the lower surface side where they do not interfere with the magnet unit 12. The body 11 is provided with a pressurized air supply path (not shown) that supplies pressurized air to the air chamber 13. By supplying pressurized air to the air chamber 13 from an external pressurized air supply source (not shown), the body 11 rises from the bottom plate 9 on the table 5, and the lower mold 10 is made movable in a horizontal plane.

Next, the operation of the embodiment described above will be explained.
The mold matching operation using the die spotting press shown in FIGS. 1 and 2 will be explained.
The slide 3 is turned over 180 degrees and placed on standby on the bed 1 so that the lower surface of the slide 3 shown in FIG. 1 faces upward. The upper mold 7 is placed and fixed on the slide 3 so that the guide posts 14 of the upper mold 7 face upward. This fixation is performed by the attraction force of the magnetic clamp 4 in the case where the magnetic clamp 4 is provided on the lower surface of the slide 3, and directly clamped on the lower surface of the slide 3 in the case where the magnetic clamp 4 is not provided.

The slide 3 is raised and turned 180 degrees, and the upper mold 7 is held so that the guide post 14 of the upper mold 7 clamped to the lower surface of the slide 3 faces downward.

A lower mold 10 is placed on a magnetic clamp 6 with a floating function on a table 5 on a bed 1 so that its guide bush 15 faces upward. The table 5 is moved into the portal frame 2, and the lower mold 10 is positioned directly below the upper mold 7.

The slide 3 is lowered and the molds are matched so that the guide post 14 of the upper mold 7 fits into the guide bush 15 of the lower mold 10. This mold matching is performed by supplying pressurized air to the air chamber 13, floating the magnetic clamp 6 with a floating function from the bottom plate 9, and manually moving the magnetic clamp 6 freely in a horizontal plane to align the guide post 14 and guide bush 15. Perform alignment. When both centers are aligned, the slide 3 is lowered to integrate the upper and lower molds 7 and 10, completing the mold matching.

After the upper mold 7 and lower mold 10 are integrated, the clamp of the upper mold 7 is released from the slide 3, the table 5 is moved to the outside of the portal frame 2, and the integrated molds 7 and 10 are floated. It is lifted from the functional magnetic clamp 6 and transported to a storage location.

What is shown in FIG. 7 is another embodiment of the present invention. The magnetic clamp 6 with a floating function has an air chamber 13 opened on the upper surface side of the body 11.

Since the lower surface of the lower mold 10 is uneven, the bottom plate 9 is arranged so as to make the lower surface of the lower mold 10 a flat surface. This bottom plate 9 closes the air chamber 13.

In this embodiment, by supplying pressurized air to the air chamber 13, the upper mold 10 floats through the bottom plate 9, so it is possible to manually move the upper mold 10 lightly within a horizontal plane. Therefore, the same mold matching work as in the embodiment described above can be performed.
In addition, in FIG. 7, the air chamber 13 is opened on the upper and lower surfaces, but the lower air chamber 13 may not be provided.

The embodiments disclosed herein are illustrative in all respects and are not restrictive. For example, the target workpiece is not limited to a press mold, but may be a resin mold. The shape of the air chamber 13 is not particularly limited, and the air chamber 13 is not limited to a full-face opening, but may be one in which air is ejected from a slit-shaped opening, a nozzle-shaped opening, or the like to cause the air to float. Any material that forms an air gap between the surface of the body 11 and the bottom plate 9 may be used. Further, the bottom plate 9 is not essential and is unnecessary if the other side (top surface of the table, bottom surface of the workpiece) is a flat surface.

The scope of the present invention is indicated by the claims rather than the above description, and includes all changes within the meaning and scope equivalent to the claims.

1 Bed 2 Gate-shaped frame 3 Slide 4 Magnetic clamp 5 Table 6 Magnetic clamp with floating function 7 Upper mold 8 T-slot 9 Bottom plate 10 Lower mold (work)
11 Body 12 Magnet unit 13 Air chamber 14 Guide post 15 Guide bush

Claims (3)

In a magnetic clamp used for a table on which the lower mold of a mold coupling device is used for mold matching work such as a press mold consisting of an upper mold and a lower mold,
a body having an upper surface on which the lower mold is placed and a lower surface on which the table is placed;
The body is provided with a magnet unit that attracts the lower mold , and an air chamber that opens on at least one of the upper and lower surfaces ,
A bottom plate is arranged that closes the air chamber and comes into contact with the lower mold or the table,
A floating device configured such that when pressurized air is supplied to the air chamber, the bottom plate separates from the body and the lower mold floats relative to the table, thereby allowing the lower mold to move freely in a horizontal plane. Magnetic clamp with function. 2. The magnetic clamp with a floating function according to claim 1, wherein the body is provided with a magnet unit that attracts the table . A die spotting press equipped with a slide on which the upper mold of the mold is attached and which can be moved up and down and reversible, and a table on which the lower mold of the mold is placed and which can be moved laterally from directly below the slide,
A die spotting press, wherein the table is equipped with the magnetic clamp with a floating function according to claim 1 or 2.

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