JPS6230050B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention aims to simplify the assembly and mold alignment adjustment work of various plates that position and hold press dies, and also makes the various plates common to facilitate their storage and management. This relates to a mold unit.

When performing press work, it is a holding mechanism that fixes and holds the upper and lower molds in a predetermined position with respect to the press machine, and guides the vertical movement of the molds in accordance with the reciprocating movement of the slide of the press machine. A mold unit is required.

An example of this type of mold unit is shown in FIG.

That is, a punch holder 1 having a shank 2 connected to a slide of a press machine and a die holder 3 fixed on a bolster of a press machine are each provided with a guide bush 4 and a guide post 5, and assembled in a die set format.

Then, the punch plate 6 with the punch 7 fixed thereon and the die plate 8 with the opening 9 serving as the die are attached to the punch holder 1 and the die holder 3, respectively, and after the molds are matched, a dowel pin is driven in and the position is determined. Fix it. After that, the die holder 3 is placed and fixed on the bolster of the press machine,
The shank 2 is connected to a slide shaft to perform press work. Further, in FIG. 1, 10 is a stripper plate on which a stripper bolt 11 is installed, and 12 is a stripper spring.

By the way, recently, the field of processing in press operations has expanded significantly, and products have also become more diverse. For this reason, the demand for efficient production of molds is increasing.

However, in the conventional method shown in Figure 1,
Because the die set, punch, and die are each made and assembled separately, accurate positioning of the two is a laborious and time-consuming task that relies on intuition, and requires considerable skill. This had become an obstacle in making molds efficiently.

On the other hand, methods have also been considered that eliminate positioning and adjustment work for the die set. In other words, if the die plate and punch plate are machined and the guides are attached at the same time, and then the guide parts are attached and assembled, the die matching is achieved mechanically, so it is possible to attach the die plate to the die set as is. It can also take the form of a guide.

However, in this case, extremely advanced technology and high-grade machine tools are required to attach and process the guide parts to the die and punch plate, and the guide device required for these needs to be manufactured separately, and this sub-guide. Therefore, there is a problem in that it requires double effort to attach the matched dies to the die set.

By the way, as mentioned above, with the expansion of the product field, the number of sizes of plates constituting each mold has become extremely large, and the storage and management of these plates has become complicated. For example, in addition to the punch plate and die plate, the mold unit shown in Figure 1 includes a stripper plate as mentioned above, and parts that receive the pressure applied to the punch as necessary. Since king plates and the like are also used, it is quite troublesome to store and manage these various sizes, taking into account the material type.

Therefore, one way to solve the above-mentioned problems is to standardize the size of the mold plate.
For each die set, the size of the mold plate is standardized to one type or several types, and the number of types of mold plates that must be prepared in advance is minimized as much as possible. However, the current standardization of each plate is done individually for the mold plate side and the mold holder side that makes up the die set, so each plate needs to be prepared separately, and there are many types of each plate. There is no escape from what will become. If the mold plate and the mold holder assembled in die set format were standardized at the same time and could be used for both, the variety of sizes could be greatly reduced.

The present invention has been made in view of the above-mentioned circumstances, and has the same size and shape at a common position on a plane of a die holder such as a die holder or a punch holder and a die plate such as a die plate or a punch plate that constitute a die set. A plurality of through holes are provided, and these through holes are used as a positioning reference for each plate, and a guide means for guiding the vertical movement of the mold unit is provided in the through hole, and this guide means is held in the through hole. The fixing means for fixing each plate is housed, and the plates are positioned with respect to each other using either the guide means or the fixing means, thereby providing compatibility between the plates and facilitating their storage and management. The object of the present invention is to provide a mold unit that simplifies the assembly and positioning work of the mold unit and the work of matching the molds, and further improves the effective use area of each plate. .

Embodiments of the mold unit according to the present invention will be described below with reference to the drawings.

FIG. 2 shows an example in which the mold unit according to the present invention is applied to a so-called reverse mold in which the punch is the lower mold and the die is the upper mold, and the product is dropped by a pad. Of course, if you turn the mold upside down, the product will fall out.

In FIG. 2, the left side of the dashed line is a cross-sectional view of the main part, and 21 indicates that the shank 22 connected to the slide shaft of the press is screwed, for example. This is a die holder that is implanted by means such as. Further, a knock out rod 23 is provided passing through the shank 22 and die holder 21.

On the other hand, 24 is a punch holder placed and fixed on the bolster of the press machine, and 25 is the die holder 2.
1 is a die plate for holding the die 26, and 27 is a knockout pad connected to the knockout rod 23 for dropping the product.

Further, 28 is a punch plate for holding the punch 29 on the punch holder 24, and a punch pad 30 serving as a packing plate is disposed between the punch holder 24 and the punch plate 28 as necessary. .

Furthermore, numeral 31 is a stripper plate whose vertical stroke is regulated by a stripper bolt 31b, and which is constantly pushed up toward the die side by a stripper spring 31c.

Regarding the plate configuration, the mold unit of the present application is similar to the conventional mold unit, but the present application has a new structure different from the conventional mold unit regarding the positioning and guiding mechanism of each plate described below. It is.

That is, the die holder 21 has a counterbore hole 21b.
A through hole 21a with a diameter is bored. All other plates, that is, die plate 25, stripper plate 31, punch plate 28, punch pad 30, and punch holder 24, also have through holes 25a and 31a of the same diameter whose centers are on the center line of the through hole 21a. , 28a, 30a and 24a
The through holes 24 are drilled in the through holes of other plates other than thin plates such as the packing plate 30.
A counterbore hole is formed that is the same as the counterbore hole 24b provided in section a.

A plurality of at least two or more through holes are formed in accordance with the guide arrangement in a conventional die set.

In this case, if the arrangement shape of each through-hole is such that, for example, if each plate has four through-holes, each through-hole is located at each vertex of a right-angled quadrilateral, each plate can be used both front and back. This has the advantage that it can be used for Furthermore, regarding the die holder 21 and the punch holder 24, if it is necessary to provide a mounting part 21c as shown by the broken line in FIG. Different external dimensions may be used.

In this case as well, it goes without saying that the through holes 21a and 24a are formed at positions corresponding to the other plates. However, since the die holder 21 and punch holder 24 have different sizes from other plates, compatibility with other plates is lost.

Now, as mentioned above, each plate has through-holes that are concentric and have the same diameter, but the processing and mold processing for attaching a mold to each plate is based on the through-holes drilled in each plate. I will do it. In this case, each plate must first be positioned with respect to the machine tool and machining standards must be set, but it is cumbersome to perform this work individually for each plate. Therefore, if a jig as shown in FIG. 3 is used, for example, processing becomes extremely easy.

That is, a jig plate 41 with a through hole 41a of the same diameter drilled at the same position as the through hole of each plate is made in advance, and it is positioned on the table of a machine tool, clamped, and then the machining standard is set. Set. Then, the jig plate 41
Place the plate to be processed, for example, the die plate 25, on top, and insert the respective through holes 25a, 4.
Insert a tightly fitting plug 42 through 1a;
The die plate 25 is attached to the jig plate 4 by another means.
If the plate is clamped at 1 and processed, each plate can be processed extremely efficiently and with high precision.

The processed plates are then assembled as a mold unit as shown in FIG.

First, the flanged washer 32 as a fixing means that fits into the through hole 21a with the counterbore 21b of the die holder 21 is inserted.

On the other hand, in the through hole 25a of the die plate 25,
A flanged guide bushing 33 having the same external dimensions as the through hole 25a and constituting one of the guide means.
is tightly inserted across the mating surfaces of the die holder 21 and die plate 25 to position the die holder 21 and die plate 25. Further, a snap ring 34 is fitted into the guide bush 33, and a nut 36 is fitted using the snap ring 34 as a stopper, so that the bolt 35 inserted into the flanged washer 32 is screwed into the nut 36. The flanged washer 32 and the guide bush 33 are tightened and fixed. In this way, the die holder 21 and the die plate 25 are accurately positioned, and at the same time, they are tightened and integrated.
No relative deviation will occur thereafter.

Reference numeral 37 denotes a flanged guide post constituting the other guide means, and each through hole 2 of the punch holder 24, punch plate 28, and punch pad 30
4a, 28a, and 30a, and a base 37 for positioning the punch holder 24, punch plate 28, and punch pad 30;
a, a flange portion 37b having a larger diameter than each of the through holes, and a post portion 37c formed concentrically with the base portion 37a and slidingly fitted to the guide bush 33;
A screw hole 37d is formed in the center of the base 37a. 38 is the through hole 24a of the punch holder 24
It is a washer with a flange as a fixing means that fits into the
By passing through this flanged washer 38 and screwing the bolt 39 into the screw hole 37d, the flanged washer 38 and the guide post 37 are tightened and fixed, and each plate of the punch holder 24, punch plate 28, and punch pad 30 is fixed. Accurate positioning and integration.

Further, reference numeral 40 denotes a guide bush for the stripper plate 31, which has an outer diameter that matches the inner diameter of the through hole 31a, and an inner diameter that slides and fits into the post portion 37c without a gap.

Therefore, the post portion 37c of the guide post 37
However, if the guide bush 33 is slid into the guide bush 33, the through holes of each plate mentioned above will all be aligned on the same center line, and since this through hole was used as the mold processing reference in advance, the die 26 and the punch 29 will be able to engage with each other. In some cases, of course, an accurate mold match can be obtained automatically.

In addition, the precision of the mold matching is expressed as a total error of all machining, so the more precise the machining is, the better the precision of the mold matching is. Thus,
The positioning of each plate and the mold matching, which required a long time for a skilled worker, can now be performed without adjustment, and this has an extremely large effect on the rationalization of mold processing.

Moreover, in this case, each of the plates mentioned above has a through hole in a common position, so they are compatible with each other, and if you prepare multiple types of plates with different thicknesses, you can immediately use them as a mold unit. It becomes possible to assemble. Therefore, the storage and management of each plate type only needs to be done regarding the thickness, and it is possible to produce many types of molds with a small number of types of plates.

Further, a guide means for each plate and a fixing means for holding the guide means and fixing at least some of the plates are housed in the through hole, and the guide means or the fixing means positions the plates. Another advantage is that, for example, the effective usable area of the die plate and punch plate is greatly increased, and the degree of freedom in mold design is increased.

Incidentally, in the above-mentioned embodiment, the stripper plate 31 is also movably guided by the guide post 37, but if the punch 29 is sufficiently thick, the stripper plate 31 can be moved as shown in FIG. 4a. The plate 31 may be guided only by the punch 29 instead of being guided by the guide post 37.

Furthermore, the guide post 37 is connected to the guide bush 3.
If it is necessary to guide through the 4th
As shown in FIG.
In either one or both of the counterbore holes in a,
Fit the flange 33a of the bushing into the through hole 21
The guide bush 33 may be held within the guide bushes a and 25a.

However, in the case shown in FIG. 4b, means 50 for tightening the die holder 21 and die plate 25 must be provided separately.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications without changing the gist thereof.

As described above, in the mold unit according to the present invention, through-holes with the same inner diameter are bored at common positions on the plane of the plates that constitute the upper and lower molds and hold them, and , a guide means for guiding the vertical movement of each plate, and a fixing means for holding the guide means in the through hole, and at least one of the guide means or the fixing means positions each plate. .

Therefore, as long as the molds for various plates are machined using the through holes as a reference and they are assembled using the guide member, the positioning and mold matching of each member can be performed without adjustment. This greatly simplifies the assembling work of the mold unit, and the effects obtained are extremely large in terms of improving work efficiency and making molds quickly and inexpensively.

Furthermore, in the mold unit according to the present invention, the plates consisting of the mold holder and the mold plate have through-holes formed in common positions, so each plate is compatible, and storage and management thereof is extremely easy. It becomes easier. In other words, it is no longer necessary to store and manage each plate by function as in the past, and it is only necessary to manage them by thickness, which reduces the number of types of plates that must be kept at all times. This saves storage space and provides excellent management benefits.

In addition, since the tightening means for each plate type is also housed in the through hole, the effective area used as a mold increases, and the effect of increasing the degree of freedom in mold design is achieved. , is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a partially cross-sectional front view of a conventional mold unit; FIG. 2 is a partially cross-sectional front view of an embodiment of a mold unit according to the present invention; FIG. 3 is a perspective view showing a jig applied to the same embodiment, and FIGS. 4a and 4b are sectional views of main parts showing another embodiment of the mold unit according to the present invention. 21...Die holder, 24...Punch holder, 25
...Die plate, 28...Punch plate, 33...
Guide bush, 37...Guide post, 21a,
24a, 25a, 28a... through holes.

Claims (1)

[Claims] 1 In a mold unit consisting of various plates constituting a press mold and a press die set to which they are assembled, common planes of the punch holder and die holder constituting the die set and the mold plate constituting the press mold a plurality of through holes having the same inner diameter drilled at positions where the guide means is housed in the through holes, and a guide means consisting of a guide post and a guide bush; , the member constituting at least one of the guide means and the fixing means passes through the mating surfaces of plates that are always integrated among the die holder, punch holder, and mold plate and is tightly fitted into the through hole. A mold unit configured to perform positioning.