JPS6347369Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that allows die alignment work on a draw bench to be performed quickly and easily by remote control.

A draw bench is a machine that pulls out the material pushed into a die and plastically processes it into a polished bar such as a round bar or square bar of the required size. A carriage 101 to be gripped, a chain 102 that pulls the carriage 101 backward (to the left in the figure), a sprocket wheel 103 that winds the chain 102, and a motor, speed reducer, etc. (not shown) that drives the sprocket wheel 103. Consists of. A material (not shown) conveyed on the carry-in conveyor 104 by a pusher (not shown) is pushed into a die (not shown) in a die holder 107 attached to a pusher pointer 106 provided just before the draw bench 105, and then transferred to the carriage 10.
1 to a predetermined location from a delivery conveyor (not shown).

By the way, depending on the shape accuracy of the material and the dimensional accuracy of the die, bending may occur in the polished bar after drawing, and this is due to the inherent unevenness of the cutting edge in the circumferential direction of the inner circumferential surface of the die. It is thought that there is. In order to reduce the bending of the polishing bar due to this type of die, it is best to tilt the die in a certain direction in advance so that the bending of the polishing bar is canceled out, and then pull out the material in this state. It is known. For this reason, in the past, an alignment operation was performed in which the die was tilted in response to the bending of the polished bar material after processing, and for this purpose, one of two alignment devices was conventionally employed. As shown in FIG. 2a, which shows the cross-sectional structure of one alignment device, the die holder 107 and the die fixture 109 into which the die 108 is fitted form a spherical pair. It is designed to be able to swing in any direction.
At least three adjustment bolts 111 are arranged at equal intervals on a presser plate 110 fixed to the die holder 107, and the inclination angle of the die mount 109 can be arbitrarily set by adjusting the screwing amount of these adjustment bolts 111. It's getting old. As shown in FIG. 2b, which is an enlarged view of arrow B in FIG. This device does not require the adjustment bolt 111.

However, since alignment work using such an alignment device is performed by an operator on the draw bench 106 and relies on intuition, it involves risks such as falling, requires skilled technique, and is inefficient. It was hot.

SUMMARY OF THE INVENTION In view of the drawbacks of conventional alignment devices, an object of the present invention is to provide a device that can quickly and easily align dice on a draw bench.

The structure of the self-aligning device for draw bench dies of the present invention that achieves this purpose is such that an aligning bracket whose outer circumferential surface is a part of a spherical surface is fitted into the device main body so that these brackets form a pair of spherical surfaces. A die holder is removably locked in the center of this alignment bracket, and the die for plastically processing the workpiece into a predetermined shape when the workpiece passes therethrough is set so that its center coincides with the tilting center of the alignment bracket. The tips of two screw type centering rods are attached to the die holder and extend and contract in the direction of passage of the workpiece relative to the apparatus main body to adjust the tilting state of the centering bracket. The tip of at least one fluid pressure type centering rod is connected to form a pair and is capable of expanding and contracting in the direction of passage of the workpiece relative to the apparatus main body to fix the centering bracket. It is characterized by being connected to form a pair.

Hereinafter, one embodiment of the draw bench die self-aligning device according to the present invention will be described in detail with reference to FIGS. 3 to 7. FIG. As shown in FIG. 4, which shows a cross section in the direction of arrows, and FIG. Front plate 1 that locks the
4 is fixed, and a spherical pair is formed on this front plate 14 and the centering bracket 13. A die holder 17 to which a die 16 is attached via a presser plate 15 is removably locked to the alignment bracket 13 in a direction perpendicular to the direction in which a workpiece (not shown) passes (left-right direction in FIG. 3). A locking groove 18 is carved from the upper end toward the center, and a presser metal fitting 19 is provided at the upper end of the aligning bracket 13 to prevent the die holder 17 from coming off when it is attached to the aligning bracket 13. It is assembled into. A hanging fitting 20 for attaching and detaching the die holder 17 is provided at the upper end of the die holder 17, and the hanging fitting 20 is hooked onto a hook of a crane (not shown) and moved up and down to perform attachment/detachment work. It's summery.

On the other hand, the alignment bracket 13 is formed with a rectangular flange portion 21, which is shown in FIG.
As shown in FIG. 6, which shows a cross section in the direction of arrows, the spherical bushing 24 is fixed to the tip of the threaded centering rod 22 via a stopper 23, and is attached to a presser plate 25 integral with the flange portion 21 via a spacer 26. The spherical bushing 24 and the spacer 26 form a spherical pair. A feed nut 29 to which a spherical bushing 28 is fixed by a lock nut 27 is screwed into the threaded centering rod 22 with a male thread. It is fixed to the front plate 14 via. A rotating shaft 3 extending from a chain spring 33 connected to an alignment rod feed motor 32
4 is rotatably supported by a pillow block 34 fixed to a stand (not shown), and this rotating shaft 34 and the threaded alignment rod 22 are connected to a pair of universal joints 36.
are connected via. Since a spline 38 is engraved on the connecting shaft 37 of the universal joint 36,
Operate the aligning rod feed motor 32 to move the screw type aligning rod 2.
2 in the left-right direction in FIG. 6, the distance between the pair of universal joints 36 only changes, and no inconvenience occurs. A tire-shaped coupling 40 is connected to a detector 39 that detects the amount of movement of the threaded centering rod 22 and confirms the inclination angle of the die 16, and a rotation shaft 41 extending from the tire-shaped coupling 40 and the rotation shaft 34 are connected to each other. , are connected via a timing belt 42. In addition, the reference numeral 43 in the figure is a pillow block attached to a stand (not shown) that supports the rotating shaft 41, and in this embodiment, the above-mentioned alignment system is used as the alignment bracket 1.
They are provided at two locations on the upper side of the flange portion 21 of No. 3.

As shown in FIG. 7, which shows the cross-sectional structure in the direction of the − arrow in FIG.
A spacer 4 is attached to a presser plate 25 that is integrated with the flange portion 21.
7, and this spherical bushing 46
and spacer 47 constitute a spherical pair. A hydraulic cylinder 50 in which a piston rod 49 is connected to a hydraulic alignment rod 44 is attached to a bracket 48 fixed to a frame (not shown), and this hydraulic cylinder 50 aligns the alignment bracket 13 with a constant tension.
It is in a tense state. In this embodiment, this alignment system is provided at two locations below the flange portion 21 of the alignment bracket 13.

Therefore, by appropriately driving the alignment rod feed motor 32, the alignment bracket 13 can be tilted in any arbitrary direction, and the three-dimensional tilt position can be automatically read by the detector 39. It is. In this embodiment, the hydraulic centering rod 44
Although the tilting state of the alignment bracket 13 is fixed by using two alignment brackets, it is also possible to align the die 16 by providing only one or three or more alignment brackets, but in this case, three alignment brackets are used. 22 must be moved simultaneously under NC control, and care must be taken not to form a gap between the contact surfaces that form the spherical pair.

During the actual pulling operation, one workpiece (not shown) is pulled out in advance, and the direction and angle of inclination of the alignment bracket 13 are determined empirically from the direction of bending and amount of warpage, and the direction and angle of inclination of the alignment bracket 13 are determined empirically. The feed motor 32 is driven based on the feedback signal from the detector 39.

As described above, according to the draw bench die self-aligning device of the present invention, the die holder can be attached simply by dropping the die holder into the alignment bracket, and replacement work can now be easily performed.
In addition, since the two screw type centering rods can each be freely expanded and contracted independently, and the die centering work can be electrically controlled remotely, the work can be done quickly, easily, and reliably.

[Brief explanation of the drawing]

Figure 1 is a front view showing the external appearance of the draw bench.
FIG. 2a is a sectional view showing the structure of a conventional die aligning device, FIG. 2b is an enlarged sectional view taken in the direction of arrow B in FIG. 2a, showing the structure of another conventional die aligning device; FIG. 3 is a plan view of a push pointer representing an embodiment of the draw bench die self-aligning device according to the present invention, FIG.
Figures 6 and 7 are - in Figure 4, respectively.
13 is an alignment bracket, 14 is a front plate, 16 is a die, 17 is a die holder, and 18 is a locking groove. 21
is the flange part, 22 is the threaded centering rod, 24, 2
8, 46 are spherical bushes, 26, 30, 47 are spacers, 29 is a feed nut, 32 is an alignment rod feed motor, 34, 41 is a rotating shaft, 36 is a universal joint, 38
is a spline, 39 is a detector, 42 is a timing belt, 44 is a hydraulic centering rod, and 50 is a hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] An aligning bracket whose outer circumferential surface is a part of a spherical surface is fitted onto the main body of the device so that they form a pair of spherical surfaces, and a die holder is removably locked in the center of this aligning bracket, and the workpiece is A die that plastically processes the workpiece into a predetermined shape when it passes is attached to the die holder so that its center coincides with the center of tilt of the alignment bracket, and the die is expanded and contracted in the direction of passage of the workpiece relative to the device body. The tips of two screw-type centering rods for adjusting the tilting state of the centering bracket are connected to the centering bracket so as to form a spherical pair, and the direction in which the workpiece passes with respect to the main body of the device is fixed. A draw bench die self-aligning device characterized in that a tip end of at least one fluid pressure type centering rod capable of expanding and contracting to fix the centering bracket is connected to the centering bracket so as to form a spherical pair.