JP2755430B2 - Progressive processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to, for example, when performing processing such as punching and bending drawing on a workpiece, individually performing processing in each step in one apparatus. The present invention relates to a progressive processing apparatus that sequentially sends the processing to the next step to perform additional processing and completes the processing in the final step.

[Conventional technology]

2. Description of the Related Art Conventionally, when a steel sheet is formed into a sheet metal product having a predetermined shape by a forming process such as punching, bending drawing, compression, or the like, the process usually involves several steps. When such a sheet metal product is manufactured in a large quantity, each step or stage is individually processed in one processing die, and is sequentially sent to the next stage to add the processing and proceed. Means for completing the processing on the stage is employed. Such a processing die structure is called a progressive die. For example, since one sheet metal product can be obtained for each stamp of the press, there is an advantage that the efficiency is extremely high.

FIG. 3 is an explanatory view showing an example of the above-mentioned progressive die for processing a bowl-shaped sheet metal product. Although FIG. 3 is a cross-sectional view for easy understanding, hatching is omitted, and the drawing is slightly simplified.

In FIG. 3, reference numeral 10 denotes a block type, which comprises an upper die 10a and a lower die 10b. For example, the upper die 10a is placed on a press ram (not shown) via a shank 11, and the lower die 10b is placed on a press table. Attach it to a positioning fixing plate (not shown). Next, the block die 10 includes, in order from the left, a hole punch 12a and a hole die 12b, a cutting punch 13a and a hole die 13b, and first to fourth dies 14a, 15a, 16a, and 17a for drawing. And respective punches 14b, 15b, 16b, 17b, first and second shaping dies 18a, 1
9a and punches 18b and 19b and edging die 20a and punch 20
Arrange b. These punches and dies are held at predetermined intervals by an upper die holder 21a and a lower die holder 21b.

With the above configuration, if the workpiece 3, for example, a strip is fed from the left between the punches and dies at a constant pitch, the punches and dies can sequentially perform processes such as punching and bending drawing. For example, a bowl-shaped or cap-shaped sheet metal product can be obtained.

FIG. 4 and FIG. 5 are a plan view and a front view, respectively, showing a processing state of a workpiece. In both figures, the workpiece 3 is sent from left to right at an equal pitch P, and a pilot hole 4 is formed by punching dies 12a and 12b shown in FIG. 3 to form an upper die holder 21a and a lower die holder. By engaging a pilot guide (not shown) disposed between the stage and the stage 21b, the workpiece is positioned on each stage. Next, reference numerals 31 to 38 denote stages, respectively.
Each has an interval of the feed pitch P of the workpiece 3. These stages will be schematically described with reference to FIG. First, in the stage 31, an arc-shaped notch having a diameter larger than the outer dimensions of a cap-shaped sheet metal product is formed in the workpiece 3 by the cutting punch 13a and the cutting die 13b. Thereafter, the workpiece 3 is sequentially and intermittently moved to the right at the pitch P, whereby the stages 32 to 35 are moved.
At this time, the first to fourth drawing processes are performed by the first to fourth drawing dies 14a to 17a and the punches 14b to 17b, respectively. After completion of the above-mentioned cutting and drawing, the first and second stages 36 and 37 are used.
The first and second shaping processes are performed by the shaping dies 18a and 19a and the punches 18b and 19b, respectively, thereby completing the inner and outer shapes. Next, in the stage 38, the die 20a for trimming is used.
And the punch 20b finally regulate the outer dimensions, and separate the cap-shaped sheet metal product 39 from the workpiece 3;
Complete the processing. In each of the above stages, the block mold 10 is provided with a means for holding wrinkles and a knockout means for each stage in order to prevent wrinkles of the workpiece 3 due to drawing and shaping. However, illustration is omitted.

[Problems to be solved by the invention]

In the progressive processing apparatus such as the above-mentioned conventional progressive die, the production speed is high, the delivery time from the input of the workpiece to the completion of the processing is short, the number of processes in the middle of the press processing is small, and the number of workers is small. On the other hand, there is an advantage in that mass production is possible, but there are the following problems. That is, since a plurality of pairs of punches and dies are incorporated in one mold, the mold structure becomes extremely complicated, requiring high-precision mold manufacturing technology, and the manufacturing period is lengthened. The cost will increase. Also, when repairing or adjusting the mold for partial damage, it is necessary to disassemble the entire mold, which is extremely complicated and requires a great deal of time and man-hours. Furthermore, in the case of high-mix low-volume production, if the dedicated mold is completely manufactured every time the shape of the workpiece is different, the cost of the mold will be relatively high, and in recent years the demand for the FMS production system has been increasing. There is a problem that it cannot respond.

The inventors of the present invention have solved the above-mentioned problems in the prior art, and have a simple structure and a progressive machining apparatus as shown in FIGS. For a patent application dated December 1, 1988 (Japanese Patent Application
No. 304694). FIG. 6 is a front view of an essential part of the proposed progressive machining apparatus, and FIG.
The figure is a plan view of a main part.

As shown in FIGS. 6 and 7, the progressive feeding apparatus proposed above firstly includes a press table 5 having a U-shaped punch / die set 50 for forming a pilot hole and having two T-grooves 8 formed therein. It is set on top using the two T-grooves 8 described above. Next, a U-shaped pilot guide 60 is set at a distance P from the U-shaped punch and die set 50 to engage with the pilot hole and correct the processing position of the workpiece. Here, P is a feed pitch of a workpiece (not shown) fed from right to left. Furthermore, a U-shaped punch / die for incision processing is placed at a distance of 2.5P from the U-shaped punch / die set 50.
The die set 70, the U-shaped punch and die set 80 for drawing at a distance of 4.5P, the second U-shaped pilot guide 60 at a distance of 6P, and the U-shaped for flange hole processing at a distance of 7.5P A punch and die set 90 is provided, and a U-shaped punch and die set 100 for edge cutting is disposed at a distance of 9.5P. Note that reference numeral 9
Is a mounting vault, and 6 is a spacer. The spacer 6
Are fixed to the lower surface of the press ram 7 in correspondence with the positions of the U-shaped punch / die set and the U-shaped pilot guides 50 to 100. By feeding, for example, a steel strip from the right side at equal pitches to the progressive feeding apparatus having the above-described configuration and operating the press ram 7, a bowl-shaped or cap-shaped sheet metal product can be obtained.

In the above-described progressive feeding apparatus proposed above,
A U-shaped pilot guide 60 is provided to make the processing position on the workpiece accurate. And because the U-shaped pilot guide 60 is an independent device,
Since the installation location of the U-shaped pilot guide 60 is required, there is an undesired problem that the line of the progressive processing apparatus becomes long. 6 and 7, the number of the U-shaped pilot guides 60 is two. However, in order to improve the accuracy of the processing position with respect to the workpiece, the U-shaped pilot guide 60 is required. It is better to increase the number of installations of 60, but the increase in the number of installations promotes an undesired problem that the line of the progressive feeding apparatus becomes long. In order to improve the accuracy of the machining position, the U-shaped pilot guide 60
Is preferably as close as possible to the processing position and the position can be easily adjusted.

The present invention solves the above-mentioned problems, and makes it possible to make the installation position of the pilot guide close to the processing position and easily adjust the installation position without increasing the line length of the progressive processing apparatus. It is an object of the present invention to provide a progressive feeding apparatus capable of improving the accuracy of a processing position with respect to a workpiece by tightening.

[Means for solving the problem]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems. Therefore, a progressive feeder according to the present invention includes a pilot processing means for sequentially processing pilot holes having a predetermined pitch in a workpiece, and A plurality of independent processing means configured to perform processing corresponding to the processing step, wherein the pilot processing means and the plurality of processing means are provided in order in the feed direction of the workpiece. A configuration in which at least the plurality of processing means are independently and freely changeable in the arrangement direction in the feed direction of the workpiece, and a pilot guide means engaging with the pilot hole is provided between the processing means. In the progressive feeding apparatus described above, the pie rod guide means is mounted and disposed on a side surface of the processing means in the front direction in the workpiece feeding direction. Further, a pitch adjusting plate for adjusting the position of the pilot guide means is removably interposed between the pilot guide means and the side face of the processing means.

 Hereinafter, description will be made with reference to the drawings.

〔Example〕

FIG. 1 and FIG. 2 are explanatory views for explaining an embodiment of the present invention. FIG. 1 is a state diagram at the top dead center of the press ram, FIG. 1 (A) is a front view, and FIG. 1 (B) is a side view. FIG. 2 is a state diagram at the bottom dead center of the press ram, and FIG.
FIG. (B) is a side view. In the drawing, reference numeral 1 denotes a pilot guide, 1-1 denotes a pilot main body frame, and 1-
2 is a pilot pin, 1-3 is a stripper, 1-4 is a knockout spring, 1-5 is a pitch adjustment plate, 1-6 and 1-7 are pilot position adjustment screws, 1-8 is a pilot pin engagement hole, -9 is a mounting bolt, 1-10 is a pilot pin holding part, 1-11 is a stripper holding bolt, 1-12 is a pilot pin holding part supporting bolt, 2 is a punch and die set, 2-1 is a hydraulic cylinder, 2- 2 is press ram, 2
-3 indicates a processing table, and other symbols are the third.
FIG. 7 corresponds to FIG. 1 (B) and 2 (B), a part of the punch / die set 2 is omitted for simplification of the drawings, and the pilot guide 1 is described for convenience. 3 shows an irregular main section of the pilot guide 1. Also, for example, in FIG. 1 (B) and FIG. 2 (B), the components according to the present invention are simplified for simplification of the drawing, as the illustration of the stripper holding bolts 1-11 is omitted. It is noted that some parts are not shown in FIGS. 1 and 2 in order to facilitate understanding.

The present invention relates to a progressive feeder having basically the same processing steps as the progressive feeder described with reference to FIGS. 6 and 7 at the beginning of the present specification. The punch and die set 2 in the illustrated embodiment corresponds to the U-shaped punch and die sets 70, 80, 90, and 100 in the progressive feeder shown in FIGS. 6 and 7. Therefore, description of the configuration and operation of the punch and die set 2 will be omitted, and the configuration and operation of the pilot guide 1 according to the present invention will be described with reference to FIGS.

The pilot guide 1 according to the present invention includes a pilot body frame 1-1, a pilot pin 1-2, a stripper 1-3, a knockout spring 1-4, and a pitch adjustment plate 1-.
5. Pilot position adjusting screws 1-6 and 1-7 are main components.

The pilot body frame 1-1 has a pilot pin engaging hole 1-8 into which the pilot pin 1-2 is inserted, and a detachable pitch adjusting plate 1-5 on a side surface of the punch / die set 2. And is fixed by mounting bolts 1-9.

The pilot pin 1-2 is connected to the pilot pin holding portion 1-
Press ram 2-2 of punch and die set 2 through 10
Are supported by pilot pin holding portion support bolts 1-12.

The stripper 1-3 is supported by the press ram 2-2 via a stripper holding bolt 1-11, and a knockout spring 1-4 interposed between the stripper 1-3 and the pilot body frame 1-1. Pressed.

FIG. 1 shows a state when the workpiece 3 is fed.
That is, when the workpiece 3 is fed, the press ram 2-
2 is located at the top dead center, and the workpiece 3 is fed, for example, from right to left at a feed level (arrow a in the drawing). Then, at the time of processing, as shown in FIG. 2, when the press ram 2-2 reaches the position of the bottom dead center, the workpiece 3 is pushed down and at the processing level (arrow b in the drawing). , Predetermined processing is performed.
At the time of the machining, the pilot pin 1-2 is engaged with the pilot hole 4 formed in the workpiece 3 so that the machining position is accurately indexed.

Next, a description will be given of an intermediate state from the state shown in FIG. 1 to the state shown in FIG. When one step of the press working is completed, the press ram 2-2 rises to the position of the top dead center, and the workpiece 3 is fed by a predetermined distance and stopped. This situation is illustrated in FIG. Thereafter, the press ram 2-2 is pushed down by the hydraulic cylinder 2-1 and reaches the position of the bottom dead center, so that the punch / die set 2 performs a predetermined process. This situation is illustrated in FIG. Although illustration of a transition state from the state shown in FIG. 1 to the state shown in FIG. 2 is omitted, the work material 3 before the press ram 2-2 reaches the position of the bottom dead center is omitted. When the pilot pin 1-2 is engaged with the pilot hole 4 formed in the hole, the machining position is accurately determined, and then the press ram 2-2 reaches the position of the bottom dead center. Thus, the above processing is performed accurately. Therefore, in order to accurately determine the processing position, it is necessary to accurately set the position of the pilot guide 1 (the positions of the pilot pin 1-2 and the pilot pin engagement holes 1-8).

In the present invention, the following position adjusting means of the pilot guide 1 is provided. That is, the position of the workpiece 3 in the feed direction is adjusted by adjusting the thickness of the pitch adjusting plate 1-5 detachably provided between the pilot guide 1 and the punch / die set 2. It can be carried out. Position adjustment in the front-rear direction (for example, the left-right direction in FIG. 2B) can be performed with the pilot position adjustment screw 1-6. Further, the vertical position adjustment can be performed by the pilot position adjustment screw 1-7. Thus, the pilot guide 1
Since the position adjustment can be performed accurately, it is possible to accurately determine the processing position. In order to adjust the position of the pilot guide 1 by the position adjusting means of the pilot guide 1 described above, the press ram 2-2 with respect to the pilot pin holding portion support bolt 1-12 that supports the pilot pin holding portion 1-10. Pilot main body frame 1-1 with respect to mounting through holes and mounting bolts 1-9 for fixing pilot main body frame 1-1
It is needless to say that the mounting through hole and the like are formed in a shape having a margin such as an elliptical shape.

〔The invention's effect〕

As described above, according to the present invention, in addition to the effects of the progressive feed processing device premised on the present invention described above with reference to FIGS. 6 and 7, a pilot guide for indexing the processing position is provided. The accuracy of the processing position with respect to the workpiece can be greatly improved by making it possible to easily adjust the installation position of the pilot guide while making it possible to make it on the side of the punch and die set. A progressive feeding device can be provided. In addition, since the pilot guide is not installed as an independent device but is mounted on the side surface of the punch and die set, the installation space for the pilot guide can be omitted, so that the line length of the progressive processing device can be reduced. It becomes possible.

[Brief description of the drawings]

1 and 2 are explanatory views for explaining an embodiment of the present invention, FIG. 3 is an explanatory view of a conventional progressive machining apparatus, and FIGS. 4 and 5 are diagrams of FIG. FIGS. 6 and 7 are a plan view and a front view showing a processing state of a workpiece.
FIG. 1 is an explanatory view for explaining a progressive feeding apparatus which is a premise of the present invention. In the drawing, reference numeral 1 denotes a pilot guide, 1-1 denotes a pilot body frame, 1-2 denotes a pilot pin, 1-3 denotes a stripper, 1-4 denotes a knockout spring, 1-5 denotes a pitch adjustment plate, 1-6 and 1 -7 is a pilot position adjusting screw,
1-8 is a pilot pin engagement hole, 1-9 is a mounting bolt,
1-10 is a pilot pin holding portion, 1-11 is a stripper holding bolt, 1-12 is a pilot pin holding portion supporting bolt,
2 is a punch / die set, 2-1 is a hydraulic cylinder, 2-
2 is press ram, 3 is work material, 4 is pilot hole, 5
Denotes a press table, 8 denotes a T groove, and 9 denotes a mounting bolt.

Claims (1)

(57) [Claims] A pilot processing means for sequentially processing pilot holes having a predetermined pitch in a workpiece, and a plurality of independent processing means configured to perform processing corresponding to each processing step. The pilot processing means and the plurality of processing means are provided in order in the feed direction of the workpiece, and at least the plurality of processing means are independently arranged in the feed direction of the workpiece. A progressive guide device arranged so as to be freely changeable, and provided with pilot guide means for engaging with the pilot hole between the processing means, wherein the pilot guide means is a workpiece feeding direction of the processing means. And the pilot guide is disposed between the pilot guide means and the side face of the processing means. Progressive processing apparatus characterized by being configured to be removably interposed pitch adjustment plate for adjusting the position of the stage.