JPS6213095B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a forging method using a horizontal forging press for the purpose of upsetting, that is, swaging forging.

In the perforation processing by the upsetter,
The workpiece is sequentially conveyed between the metal molds arranged in parallel to perform a predetermined forging process, and the conveyance at this time is performed by operating a manipulator. However, transportation by the manipulator, which corresponds to multiple stages of processing, is extremely complicated and takes a long time, and the posture on the mold becomes unstable due to close contact of the workpiece to the upper mold. There was a drawback that smooth conveyance was not carried out.

That is, FIG. 1A is an explanatory diagram showing a conventional manufacturing process, and the workpiece conveyance pattern in this process is shown in FIG. 1B. That is, to explain the procedure of material conveyance by the manipulator with reference to the same figure, first, as a loading process, the first manipulator 1 is lowered, and its clamp head grasps the workpiece A at point A and raises it by a predetermined amount at the same position. Subsequently, the workpiece A is moved forward from traversal and lowered at point B, and the workpiece A is placed on and released from the first mold. Here, the first manipulator 1 is returned to its original position by an upward movement, a backward movement, and a horizontal movement. Next, the workpiece A that has been processed in the first step is transported to the next processing position C, that is, onto the second mold. At this time, the second manipulator 2 is moved from horizontal to forward to downward. It moves to point B, grabs the workpiece A that has undergone the first machining, moves it upward, traverses, and then descends, and releases it at point C, completing the transfer onto the second mold. Then, the second manipulator 2 returns to its original position by an upward movement and then a backward movement. In this way, the workpiece A is sequentially conveyed onto the third and fourth molds using the second manipulator 2, and the workpiece A that has been processed at the final stage N point is processed by the operation of the third manipulator 7, i.e. Traverse → Forward → Descend → Grab →
It is carried out by the movement of ascending, retreating, traversing, descending, releasing, and rising, and is transferred onto a transport vehicle or the like.

As described above, in the conventional machining process, the conveyance of the forging machine onto each mold, especially the conveyance work of the second manipulator 2, is extremely complicated, and therefore, the above-mentioned drawbacks arise. They are forced to appear.

The present invention has been made to eliminate the above-mentioned drawbacks. That is, in the present invention, in order to quickly and accurately transfer the upsetter hole-formed product manufactured from short material between the molds, the end of the workpiece is driven into a holding member attached to the manipulator in the first step. This is characterized in that it is transported between the molds in the next process while being held integrally, and will be described below based on one embodiment shown in FIGS. 2 and 3.

FIG. 3 shows the relationship between an example of the holding member 3 for the workpiece A applied to the implementation of the present invention and the workpiece A, and the holding member 3 is the tip of the second manipulator 2. porter bar 4 fitted to
and a porter bar insert 5 attached to the end of the porter bar 4. The porter bar insert 5 has a stepped structure at its tip, which has the effect of preventing "burrs" from appearing on the end surface of the product after punching the hole.
During press forming, so-called "burrs" may occur on the peripheral edge of the rear end of the workpiece A, which may become overlapping defects in the next process. and the diameter d of workpiece A, _{d 1 <} √ ₂ ×
It has been experimentally confirmed that this can be effectively prevented by satisfying the dimensional condition of 0.57. In addition, by reducing the distance T between the end of the processing by the punch 6 and the tip of the porter bar insert 5, an improvement in yield can be expected.
By increasing the driving depth L of the workpiece A, the punch depth can be reduced, thereby making it possible to improve the life of the punch or omit a process. By adopting the above-mentioned holding means, even if the shape of the product changes, it is possible to adapt to it by changing the shape and dimensions of the porter bar insert 5.

FIG. 2 illustrates the processing procedure and conveyance pattern by the manipulator according to the present invention. The conveyance is the same as that of the conventional one, and the second manipulator 2 is moved and opposed to the workpiece A that has been carried and placed on the first mold and is waiting for the first stage processing. The end of the workpiece A is driven into the tip of the porter bar insert 5, which is supported via the holding member 3, that is, the porter bar 4, mounted on the manipulator 2, and then the first stage of drilling is performed. In this case, the second manipulator 2 starts from the standby position and moves in the order of traversing → advancing → descending, and as explained earlier, the porter bar insert 5 is opposed to the workpiece A, and driving and holding is performed here. After that, the second,
The conveyance from the third mold, that is, from the position C and D shown in FIG. It is done in this order. At point N in the final stage, the porter bar insert 5 is removed from the workpiece A, and the second manipulator 2 is moved upwards, backwards, and laterally to return to the standby location, and the required processing at point N is performed. The final stage manipulator 7 is operated to carry out the product.

According to the present invention, after the workpiece is carried onto the first mold, it is driven into the tip of the holding member of the manipulator in the first processing step to be held integrally, and this is held between the molds in the next step by the same manipulator. Therefore, the conventional complicated conveyance work between molds is omitted, and processing time can be significantly shortened by rapid conveyance, which reduces the conveyance cycle time by at least 1/2. In addition, the use of special holding members has significant effects such as improved molding yield and reduced product maintenance man-hours.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the processing steps and conveyance pattern according to the conventional method, Fig. 2 is an explanatory diagram showing the processing steps and conveyance pattern according to the present invention, and Fig. 3 is an explanatory diagram showing the relationship between an example of the holding member and the workpiece. FIG. A is a workpiece, 2 is a manipulator, and 3 is a holding member.

Claims (1)

[Claims] 1 In the upsetter drilling method, one end of the workpiece is driven into the tip of a holding member attached to the manipulator during the first processing step, and while the workpiece is held integrally, the next step is carried out between each mold. 1. A method for producing an assemblage forged product, characterized in that it is sequentially conveyed and forged.