JPS6157091B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cylindrical workpiece processing machine capable of performing processes such as butt welding, trimming, drilling, etc. on a cylindrical workpiece.

That is, in a cylindrical workpiece processing machine configured to fit and hold a cylindrical workpiece in a horn and process it using a workpiece on the slide ram side, conventionally the workpiece shown in FIGS.
As shown in the figure, the workpiece 4 on the side is moved one step toward the front side of the horn 2 as shown by arrow a, and then moved as shown by arrow b to be fitted and held by the horn 2. The slide ram 3 of the press frame 1 on which the workpiece 2 is installed is lowered, and the workpiece 4 is processed by the workpiece 3a, and then the workpiece 4 is taken out to the front side as shown by arrow c, and then taken out to the side as shown by arrow d. Because processing was performed by moving the workpiece to the horn, it was time-consuming to attach, remove, and position the workpiece to the horn.Also, since the horn is supported on a cantilever, the horn receives bending moment when the workpiece is pressed down. As a result, the workpiece is bent, resulting in machining defects due to changes in the position of the workpiece, impairing machining accuracy, and causing damage to the mold.

The present invention solves these drawbacks, and allows for quick and smooth feeding and removal of workpieces to and from the horn, increases the rigidity of the horn, ensures machining accuracy, and has a simple structure. Specifically, in the case where a cylindrical workpiece is fitted and held in the horn and the workpiece is machined on the slide ram side, the horn is centered around the shaft. The slide ram is located at the tip of each of a plurality of arms extending in the radial direction, and is configured to be rotatable about the above-mentioned axis as a fulcrum, and has a cylindrical horn located directly below the slide ram in the lower part of the slide ram. This invention relates to the structure of a machine for processing cylindrical objects, which is provided with a bolster that can be supported at two sandwiched points.

Next, an embodiment of the present invention shown in FIGS. 3 and 4 will be described.

A workpiece 3a is installed at the lower part of the slide ram 3 that moves up and down in the press frame 1, and the lower part of the cylindrical workpiece 4 fits into the upper part of the bolster 5 fixed below the slide ram 3 and can be moved. A recess 6 is formed with the upper and both sides open, and both upper surfaces of the bolster 5 sandwiching the recess 6 are formed into flat support surfaces 5a, 5a which can be joined to the lower surface of the horn 7.

Further, the horns 7 have a diameter smaller than the inner diameter of the cylindrical workpiece 4 and extend radially around a shaft 9 which is set above a stand 8 provided near the front side of the press frame 1. It is located at the tip of each of the four integrated arms 7a, and is configured to be able to rotate intermittently in one direction every 90 degrees about the shaft 9 as a fulcrum. Further, on the press frame 1 side, a support surface 5 is located at the lower part of the slide ram 3 described above and supports two points in the longitudinal direction of the horn 7 and on both sides of the fitted cylindrical workpiece 4.
a, 5a, and the supporting surfaces 5a,
A bolster 5 having a recess 6 capable of receiving the lower part of the cylindrical workpiece 4 is provided between the supports 5a.

As shown in FIG. 4, when the workpiece 4 is fitted into the horn 7 as shown by the arrow a from the supply position on one side, and the horn 7 is rotated 90 degrees, the lower part of the workpiece 4 extends into the recess 6 of the bolster 5, and the horns 7 on both sides of the workpiece 4
The lower two points of the slide ram 3 come into contact with the support surfaces 5a, 5a of the bolster 5, and the slide ram 3 descends to perform processing using the workpiece 3a.

In this case, since the two lower points of the horn 7 that sandwich the workpiece 4 are supported by the support surfaces 5a, 5a of the bolster 5, the deflection caused by the impact from the workpiece 3a is extremely small compared to a cantilevered horn. The workpiece 4 can be held.

When the machining is completed, the horn 7 is further rotated 90 degrees intermittently to move the workpiece 4 to the other side, as shown in FIG. In the same manner, the workpieces 4 can be successively fed to the horn 7 from one side and taken out one after another from the other side.

In this way, the present invention moves the horn that can fit and attach the workpiece on one side to the operating position of the slide ram and stops it, and after processing, moves the horn to the other side to remove the workpiece. Since the horns are configured to be freely movable in a circular manner, feeding and removing workpieces to and from the horns can be carried out quickly and smoothly. Therefore, workpieces can be fed one after another from one side and taken out one after another from the other side to perform work efficiently.

In addition, this horn should be a transfer machine that can continuously perform multi-step processing by installing a plurality of horns in addition to four horns and connecting a plurality of processing machines on the rotation circumference of the horn. Needless to say, you can do it too.

Furthermore, at the operating position of the slide ram, the two points of the horn on both sides that sandwich the workpiece are installed and configured so that they can be supported by bolsters, etc., thereby increasing the rigidity of the horn and improving machining accuracy. It has the advantage that it can be implemented easily with a simple structure.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional example, Fig. 2 is a plan view of a part thereof, Fig. 3 is a side sectional view of a processing machine which is an embodiment of the present invention, and Fig. 4 is a plan view of a part thereof. be. 7... Horn, 4... Workpiece, 3... Slide ram, 3a... Workpiece, 5... Bolster.

Claims (1)

[Claims] 1 In the case where a cylindrical workpiece is fitted and held in the horn and processed by the workpiece on the slide ram side, the horn is located at the tip of each of a plurality of arms extending radially around the axis, Moreover, it is configured to be rotatable around the above-mentioned axis as a fulcrum,
A cylindrical object processing machine comprising a bolster provided below the slide ram to support a horn located directly below the slide ram at two points across the cylindrical workpiece.