JP2818996B2 - Caulking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caulking device using a split punch composed of a plurality of punches.

[0002]

2. Description of the Related Art A conventional caulking device using a split punch composed of a plurality of punches will be described. For example, in order to crimp a sphere to a swaged work so that it can be freely rotated, put the sphere in a substantially cylindrical tube formed in the swaged work, and press a punch from above the swaged work. This is performed by caulking so that the cylinder wraps the sphere. In this case, when the rod is formed on the sphere and the sphere is formed on the other side of the rod, the crimping operation cannot be performed by the integral punch. Therefore, in such a case, a split punch that is divided into a plurality is used.

An important point in such a case is to prevent the split punch from opening when the split punch is pressed against the work to be swaged. For this reason, in the conventional caulking device, the punch holder is pressed in the alignment direction by the side clamp cylinder.

[0004]

However, the above-mentioned conventional caulking device has the following problems. That is, since the opening prevention of the split punch depends only on the pressing force of the side clamp cylinder, a pressing force larger than the crimping force acting on the split punch is required. For this reason,
A strong one has to be used for the side clamp cylinder, and accordingly, the size of the side clamp cylinder has become a problem. Increasing the size of the side clamp cylinder not only makes it difficult to carry in and carry out the work to and from the work table, but also makes it difficult to replace the work table.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a caulking device which can apply a predetermined caulking force to a split punch and which can be made smaller than the conventional one. It is intended to be.

[0006]

SUMMARY OF THE INVENTION A caulking device according to the present invention is a caulking device using a split type punch composed of a plurality of punches, comprising a plurality of punch holders to which each punch is attached, and a plurality of these punch holders. A holder driving unit that moves the holder up and down integrally, a plurality of side clamp cylinders that press each punch holder in the direction of the mating surface of each punch, and a substantially portal-type upper punch holding unit that holds the punch holder from above and from both sides A holding unit driving unit for vertically moving the upper punch holding unit, a lower punch holding unit attached to the base frame, and a substantially cylindrical shape for holding and holding a holding ridge formed on the upper surface of each punch. And a pressing mechanism that presses the split punch through the cylindrical punch holding portion. The split punch is mounted on the lower punch holding portion. Mari writing recess fitting from above is formed.

[0007]

[Function] During crimping work, the split punch is not only horizontally clamped by the left and right side clamp cylinders, but also directly by the lower punch holder and the cylindrical punch holder, and indirectly by the upper punch holder. Directional forces are applied.

[0008]

FIG. 1 is a schematic perspective view of a main portion of a caulking device according to an embodiment of the present invention, FIG. 2 is a schematic partially cutaway front view of a main portion of the caulking device, and FIG. FIG. 4 is a schematic plan view showing a state in which an upper punch holding portion and a cylindrical punch holding portion are removed from FIG.
FIG. 4 is a partial cross-sectional side view showing the relationship between a split punch and a work to be swaged.

The caulking device according to this embodiment has a right punch 1
A caulking device that uses a split punch 100 composed of a right punch 110R and a left punch 110L.
Split punch 1 composed of R and left punch 110L
At the time of crimping work by 00, the split punch 100 is prevented from being opened.

The caulking device comprises a right punch holder 210R on which the right punch 110R is mounted and a left punch 1R.
A punch holder 200 including a left punch holder 210L to which 10L is mounted, and a right punch holder 210
R and a left side punch holder 210L as a unit, and a holder driving unit (not shown) for vertically moving the punch holder 21L.
0R, 210L in the direction of the mating surfaces 111R, 111L of the punches 110R, 110L, and left and right side clamp cylinders 600R, 600L, and a substantially gate-shaped upper punch holding unit 300 for holding the punch holder 200 from above and from both sides. A holding unit driving unit 700 for vertically moving the upper punch holding unit 300;
0, and the holding projections 1 formed on the upper surfaces of the punches 110R, 110L.
It has a substantially cylindrical tubular punch holder 500 for holding and holding 12R and 112L, and a pressing mechanism (not shown) for pressing the split punch 100 via the cylindrical punch holder 500.

First, the split punch 100 is shown in FIGS.
As shown in the figure, the right and left punches 110R and 110L are symmetrical. The right punch 110R is formed in a substantially seven-character shape in plan view, and its mating surface 111 is formed.
At the upper edge of R, a holding projection 112R is formed.
In addition, on the lower surface of the right punch 110R, a swaging portion 114R (in this case, the rod-shaped work 9
A curved surface corresponding to the upper right side of the sphere 910 is formed (see FIGS. 2 and 4). Further, the swaging portion 114
A groove 115L continuous from R is formed on the mating surface 111R. In the drawing, 113R is the right punch 11
This is a through-hole for a bolt (not shown) used when attaching 0R to the right punch holder 210R.

The left punch 110L is the right punch 1 described above.
It is formed symmetrically with 10R. Therefore, as shown in FIG. 1 or FIG.
When L is closed, the right swaged portion 114R and the left swaged portion 114L cause the cylindrical portion 8 of the swaged work 800 to be closed.
A caulking unit 114 corresponding to the number 10 is configured. At the same time, a through hole 115 through which the rod portion 920 of the rod-shaped work 900 passes is constituted by the grooves 115R and 115L.

The left and right punches 110R, 110
As shown in FIG. 1 and the like, the punch holder 200 to which the L is attached includes a right punch holder 210R and a left punch holder 210L.
10R and 210L are substantially U-shaped frames 610 in plan view.
It is provided inside. Right side punch holder 210R
Is movable laterally by a right side clamp cylinder 600R, which is a hydraulic cylinder attached to the outer surface of the frame 610. On the other hand, the left punch holder 210L is also movable in the left and right lateral directions by the left side clamp cylinder 600L which is a hydraulic cylinder.

The punch holders 210R, 210R
L is left and right side clamp cylinders 600R, 6
00L makes it possible to move not only horizontally and horizontally but also up and down through the punch holder 200 by the holder driving unit. Punch holder 200
Is formed in a substantially trapezoidal shape when viewed from the front with inclined left and right side surfaces.

The upper punch holding section 300 has hanging walls 310R and 310L formed on both left and right sides, and has a substantially gate shape as a whole. The inner side surfaces 311R, 311L of both hanging walls 310R, 310L are inclined so as to expand downward. Therefore, the upper punch holding unit 30
0 means that the punch holder 200 can be fitted from above.

The upper punch holding unit 3 configured as described above
00 can be moved up and down by the holding unit driving unit 700.

The lower punch holding section 400 is mounted on the upper surface of the base frame 700 via a pair of legs 420. A concave portion 410 having a width slightly larger than the width of the split die punch 100 is formed on the upper surface of the lower punch holding portion 400. The recess 410 is a portion into which the split punch 100 is fitted from above.

The cylindrical punch holder 500 has two large cuts 510 and two small cuts 5.
20 are formed. The small cutouts 520 are formed to face each other. This small notch 520 is used for the left and right punches 110 that match the mating surfaces 111R and 111L.
This is a portion for holding and holding the holding projections 112R and 112L of R and 110L. The small notch 520 sandwiches and holds the holding projections 112R and 112L, thereby holding down the split punch 100 from above, and
0 can be prevented from opening.

On the other hand, the large cut 510 is formed by the rod-shaped work 90 inserted into the cylindrical portion 810 of the work 800 to be swaged.
0 is an opening through which a ring-shaped self-supporting jig holder 970 for self-supporting before being held by the split punch 100 passes.

Below the split punch 100, there is provided a work table 710 for mounting the work 800 to be swaged. The work table 710 is attached to the upper surface of the base frame 700, similarly to the lower punch holding unit 400.

The operation of the caulking device configured as described above will be described. First, the work to be swaged 800 is placed on the work table 710, and the work to be swaged 800 is set.
The sphere 910 of the rod-shaped work 900 is put into the cylindrical portion 810 of FIG. At this point, the split punch 100 is divided into a right punch 110R and a left punch 110L, and the punch holder 200 is also located at an upper position.

As shown in FIG. 5, it is assumed that another work 950 is caulked to the other sphere 910 of the rod-shaped work 900 in the previous step. A self-standing jig 960 is fitted into the work 950, and a plurality of, for example, six, sets are formed by a ring-shaped self-standing jig holder 970.

Next, the left and right side clamp cylinders 6
00R and 600L, the punch holder 200 is moved in the horizontal direction, and the right punch 110R and the left punch 110L are moved.
And the respective mating surfaces 111R, 111L contact,
The split punch 100 closes. Closed split punch 10
In the through hole 115 composed of the zero grooves 115R and 115L,
The rod portion 920 of the rod-shaped work 900 is sandwiched.

Split-type punch 100 by holder driving unit
Descends together with the punch holder 200. Then, the split punch 100 is inserted into the concave portion 410 of the lower punch holder 400.
From above. With this, split type punch 1
In the lower part, 00 is pinched and fixed by the lower punch holder 400. In this state, the swaging portion 114 of the split punch 100 is in contact with the cylindrical portion 810 of the work 800 to be swaged, but cannot be swaged because the pressing force is small.

Next, the upper punch holder 300 is lowered from above the punch holder 200 by the holder driving unit 700 which moves up and down. At the same time, the cylindrical punch holding section 500 is also lowered, and the holding ridge 1 for holding the split punch 100 is moved.
12R and 112L are pinched and held. At this time, the ring-shaped self-supporting jig holder 970 passes through the two large cuts 510 of the cylindrical punch holding section 500.

Left and right side clamp cylinders 600
R and 600L press the punch holder 200 from both sides with high pressure. In this state, the pressing mechanism applies a high load to the split punch 100 via the cylindrical punch holding section 500. Thereby, the swaging work is performed on the work to be swaged 800. At the time of this caulking operation, the split punch 100 is moved to the left and right side clamp cylinders 600.
R and 600L, the left and right lateral forces are applied directly by the lower punch holder 400 and the cylindrical punch holder 500, and indirectly by the upper punch holder 300. The opening of the split punch 100 can be prevented with high accuracy.

When the caulking operation is completed, the cylindrical punch holding section 500 and the upper punch holding section 300 are raised, and the right and left side clamp cylinders 600R, 600R are moved.
The pressing by L is released. Further, the punch holder 20
0 rises and the split punch 100 is moved to the lower punch holding unit 4.
Deviates from 00. Thereby, the rod-shaped work 900
Can take out the swaged work 800 that has been swaged.

[0028]

The caulking device according to the present invention is a caulking device that uses a split punch composed of a plurality of punches. A holder driving unit that moves up and down, a plurality of side clamp cylinders that press each punch holder in the direction of the mating surface of each punch, a substantially gate-shaped upper punch holding unit that holds down the punch holder from above and from both sides, A holding unit driving unit that moves the punch holding unit up and down, a lower punch holding unit attached to the base frame, and a substantially cylindrical tubular punch that holds and holds a holding ridge formed on the upper surface of each punch. A holding mechanism, and a pressing mechanism that presses the split punch through the cylindrical punch holding section. The split punch is fitted into the lower punch holding section from above. Recess writing is formed.

Therefore, the opening of the split type punch is prevented not only by the side clamp cylinder but also by the upper punch holding section, the lower punch holding section and the cylindrical punch holding section as in the prior art. It is possible to prevent the split punch from opening with high accuracy without using a complicated one. Therefore, a small hydraulic cylinder can be used as the side clamp cylinder, which can contribute to downsizing of the entire caulking device. In addition, along with the downsizing, advantages such as easy loading and unloading of the work to and from the work table arise.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a main part of a caulking device according to an embodiment of the present invention.

FIG. 2 is a schematic partially cutaway front view of a main part of the caulking device.

FIG. 3 is a schematic plan view showing a state where an upper punch holding unit and a cylindrical punch holding unit are removed from the caulking device.

FIG. 4 is a schematic front view of a split punch.

FIG. 5 is a partial sectional side view showing a relationship between a split punch and a work to be swaged or the like.

[Explanation of symbols]

 100 split type punch 111R, 111L mating surface 112R, 112L holding ridge 200 punch holder 300 upper punch holding unit 400 lower punch holding unit 410 concave portion 500 cylindrical punch holding unit 600R, 600L side clamp cylinder 700 holding unit driving unit

Claims (1)

(57) [Claims] 1. A caulking device using a split type punch composed of a plurality of punches, a plurality of punch holders to which each punch is attached, a holder driving unit for vertically moving these punch holders integrally, A plurality of side clamp cylinders for pressing the holder in the direction of the mating surface of each punch, a substantially gate-shaped upper punch holding portion for holding the punch holder from above and from both sides, and a holding portion drive for vertically moving the upper punch holding portion Part, a lower punch holding part attached to the base frame, a substantially cylindrical cylindrical punch holding part for holding and holding a holding projection formed on the upper surface of each punch, and this cylindrical punch holding part And a pressing mechanism that presses the split punch through the lower punch holding portion. The lower punch holding portion is formed with a concave portion into which the split punch is fitted from above. A caulking device characterized by the above-mentioned.