JPH0340424Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a guide device for a die set to which a press mold is attached, and particularly to a guide device that facilitates insertion of a guide post into a guide bush. It is.

[Prior art]

Generally, when performing press working, a die set is used, which is equipped with an upper die and a lower die of a press mold, and has a guide device that guides the upper die to move up and down in accordance with the operation of the press machine.

FIG. 4 shows an example of a general die set. In the figure, reference numeral 1 denotes a die set, which has an upper holder part 2 that is attached to the ram of a press machine and moves up and down in accordance with the operation of the press machine, and a lower holder part 3 that is attached to the bolster of the press machine. A guide post 6 is installed in the lower holder part 3 perpendicularly to the mounting surface, and together with a guide bush 7 buried in the upper holder part 2, a guide device is configured. It guides the ascent and descent of 2. In addition, an upper mold 4 and a lower mold 5 are provided at corresponding positions in the upper holder part 2 and the lower holder part 3, respectively.
is disposed, and the upper holder part 2 moves up and down in accordance with the operation of the press machine, whereby the material is pressed by the upper die 4 and the lower die 5 to form a desired product.

Next, the guide device of the die set 1 will be explained in detail. Guide devices can be roughly divided into a plain guide type shown in FIG. 5 and a ball guide type shown in FIG. 6.

As shown in FIG. 5, the plain guide type guide device includes a guide bush 7 mounted on the upper holder part 2 and a guide post 6 implanted in the lower holder part.
It is formed by. The inner diameter of the guide bush 7 is made slightly larger than the outer diameter of the guide post 6 to form a clearance of several μm to several tens of μm. Furthermore, by applying oil or the like, an oil film or the like is formed on the sliding surface to facilitate sliding.

As described above, the plain guide type guide device has excellent load resistance and impact resistance due to its sliding bearing, and is often used as a guide for precision molds.

Furthermore, as shown in Fig. 6, a ball guide type guide device has a cylindrical member made of resin or non-ferrous metal, etc., in which a large number of balls made of steel balls etc. are rotatably and regularly arranged. A ball retainer 9 is installed between the guide post 6 and the guide bush 8. The gap formed between the guide post 6 and the guide bush 8 is formed on one side to be slightly smaller than the ball diameter of the ball retainer 9, and is used with a preload applied to the balls. Furthermore, when the guide bush 8 slides against the guide post 6, the ball retainer 9
The ball rotates and guides the sliding movement.

As mentioned above, the ball guide type guide device can handle high-speed sliding due to the rolling bearing.
Further, the guide bush 8 can be easily inserted into the guide post 6.

[Problem that the invention attempts to solve]

By the way, in recent years, guide devices of the plain guide type have been developed with guide bushes or guide posts that can handle high-speed sliding.
The scope of its use is also expanding. However, as the press mold becomes larger, the weight of the mold increases, and when the upper mold is assembled with the upper holder into the lower holder during mold matching work or after mold repair work, the upper holder part and There was a problem in that the lower holder part had to be held parallel, and that the work of inserting the guide bushing into the guide post was extremely difficult and required a lot of time. In addition, if an attempt is made to forcefully insert the mold, there is a problem in that the guide device and a part of the mold are damaged.

On the other hand, the ball guide type guide device has a rolling shaft, so the guide bush can be easily inserted into the guide post, but it has poor load resistance and impact resistance, and is used for precision molds and large metal molds. There was a problem that it was not suitable for the mold.

[Means for solving problems]

The present invention was created in view of the above-mentioned problems, and incorporates the advantages of a ball guide type guide device into a plain guide type guide device.
It is an object of the present invention to provide a guide device for a die set that has excellent insertability of a guide bush into a guide post, as well as load resistance and impact resistance.

To achieve this objective, the configuration of the present invention consists of an upper holder part to which the upper mold of the press mold is attached, a lower holder part to which the lower mold is attached, and the upper holder part moves up and down in accordance with the operation of the press machine. In the guide device for a die set, the guide device includes a guide bush attached to an upper holder portion;
The guide post is attached to the lower holder part and is disposed at a position corresponding to the guide bush, and the guide bush has a large diameter part formed on the insertion side of the guide post and is slidable on the guide post. A ball retainer having an inner diameter slightly larger than the outer diameter of the guide post is housed in the large diameter portion via a stopper mechanism.

[Effect]

With the above configuration, the die set guide device of the present invention is such that when the guide bush is inserted into the guide post, the insertion is guided by the ball retainer, and after insertion, the guide post is inserted into the slide bearing portion of the guide bush. It is slidably guided by.

〔Example〕

The present invention will be explained in detail below using the drawings. The structure of the die set is similar to the conventional die set shown in FIG. 4, so the guide device will be explained.

FIG. 1 shows an example of a guide device for a die set according to the present invention. The guide bush 10 has a bush main body 11 that is integrally or removably disposed on the upper holder portion 2 by press-fitting, adhesion, or the like. This bush main body 11 is attached to the guide post 6
a large-diameter portion 11a formed on the insertion side of the guide post 6 and having an inner diameter much larger than the outer diameter of the guide post 6; and a sliding bearing portion formed on the upper portion of the large-diameter portion 11a and slidably fitted to the guide post 6. 11b. A ball retainer 12 in which a large number of balls 12a made of steel balls or the like are regularly arranged is disposed between the large diameter portion 11a and the guide post 6. Furthermore, the ball retainer 12 is prevented from falling off by a ring-shaped stopper 13 that is removably attached to the bush main body 11. The inner diameter of the ball retainer 12 is formed to be slightly larger than the outer diameter of the guide post 6, and the ball retainer 12 and the guide post 6 are in a loosely fitted state when inserted. In addition, ball cage 1
The outer diameter of No. 2 is the same as or slightly smaller than the inner diameter of the large diameter portion 11a.

Here, when the guide bush 10 is inserted into the guide post 6, the guide post 6 comes into contact with the spherical surface of the ball 12a attached to the ball retainer 12,
Guide post 6 while being guided by ball 12a
The axial center of the guide bush 10 can be easily made to coincide with the axial center of the guide bush 10.

When the guide bush 10 is further inserted into the guide post 6, the guide post 6 is slidably fitted into the slide bearing portion 11b of the guide bush 10.

Therefore, when inserting the guide bush 10 into the guide post 6 when assembling the upper holder part 2 into the lower holder part (not shown), the insertion is guided by the ball retainer 12, so that the insertion operation is easy. This makes it extremely easy to do so, and there is no risk of damaging the guide device or part of the mold. Thereafter, when the upper holder part 2 moves up and down, for example during press processing, the guide post 6 is slidably fitted into the sliding bearing part 11b, and has excellent load resistance and impact resistance, and is suitable for precision molds. It has the advantage that it can be applied to large molds as well. Further, the ball retainer 12 is connected to the stopper 1.
By removing 3, it can be easily replaced.

[Other Examples]

The shape of the guide device is as shown in Figure 2 or Figure 3.
The configuration shown in the figure may also be used.

FIG. 2 shows a second embodiment of the guide device of the present invention. In the figure, reference numeral 20 denotes a guide bush, which includes a bush main body 21 that is integrally or removably disposed on the upper holder part 2, and this bush main body 21.
a sliding bearing portion 22 which is integrally fixed to the guide post 6 and slidably fits into the guide post 6;
2 and the bushing body 21.
The ball retainer 12 housed in the bushing body 1a, and the ball retainer 1 detachably attached to the bushing body 21.
It has a ring-shaped stopper 13 for holding 2. The sliding bearing portion 22 is formed of a bearing material such as a sintered oil-impregnated bearing, a self-lubricating bearing material whose surface is coated with silicon carbide or titanium carbide, or high carbon chromium bearing steel. It is something. Further, the ball retainer 12 is made of steel balls or the like, similar to the embodiment described above.
2a are arranged regularly.

The inner diameter of the ball retainer 12 is formed to be slightly larger than the outer diameter of the guide post 6, and the ball retainer 12 and the guide post 6 are in a loosely fitted state when inserted. Further, the outer diameter of the ball retainer 12 is set to be the same as or slightly smaller than the inner diameter of the large diameter portion 21a.

From the above, when assembling the upper holder part 2 into the lower holder part (not shown) as in the above embodiment, when inserting the guide bush 20 into the guide post 6, the ball 12a of the ball retainer 12 Since the insertion is guided, the insertion operation is extremely easy, and the guide device or part of the mold is not damaged during insertion. Thereafter, when the upper holder part 2 moves up and down, for example during press working, the guide post 6 is slidably fitted into the sliding bearing part 22,
It has excellent load resistance and impact resistance, and can be applied to precision molds and large molds.
Further, the sliding bearing portion 22 is formed separately from the bush main body 21, and the optimal bearing material can be used for the sliding bearing portion 22 according to the conditions of use. Materials suitable for mounting 12 can be selected. Furthermore, by removing the stopper 13, the ball retainer 12 can be easily replaced.

On the other hand, FIG. 3 shows a third embodiment of the guide device of the present invention. In the figure, reference numeral 30 denotes a guide bush, which includes a sliding bearing portion 31 that is integrally or removably disposed on the upper holder portion 2, and a holding portion 32 that is integrally formed with the sliding bearing portion 31 by a screw 33 or the like. have. The slide bearing portion 31 is formed of a bearing material, and its inner peripheral surface is configured to slidably fit into the guide post 6. Further, the holding portion 32 has a large diameter portion 32a having an inner diameter larger than the inner diameter of the sliding bearing portion 31. And this large diameter portion 32a
A ball retainer 12 is housed in which a large number of balls 12a made of steel balls or the like are regularly arranged. Furthermore, a ring-shaped stopper 13 is attached to the holding part 32.
This configuration prevents the ball retainer 12 from falling off by attaching it to the ball retainer 12. Further, the inner diameter of the ball retainer 12 is slightly larger than the outer diameter of the guide post 6, and is loosely fitted to the guide post when inserted. The outer diameter of the ball retainer 12 is equal to or slightly smaller than the large diameter portion 32a.

From the above, when assembling the upper holder part 2 into the lower holder part (not shown), as in the above embodiment,
When inserting the guide bush 30 into the guide post 6, the insertion is guided by the balls 12a of the ball retainer 12, which makes the insertion process extremely easy and avoids damaging the guide device or part of the mold during insertion. Not at all. For example, when the upper holder part 2 moves up and down during press processing,
The guide post 6 is slidably fitted into the sliding bearing portion 31, has excellent load resistance and impact resistance, and has the advantage of being applicable to precision molds and large molds. Moreover, since the sliding bearing part 31 is formed separately from the holding part 32 to which the ball retainer 12 is attached, the sliding bearing part 31 can be made of the most suitable bearing material depending on the conditions in which it is used. A material suitable for mounting the ball retainer 12 can be selected for the holding portion 32. Furthermore, remove the stopper 13 or loosen the screw 33 to
By removing 2, the ball retainer 12 can be easily replaced.

In addition, the shape of the balls 12a attached to the ball retainer 12 is not limited to a spherical shape, but may be a drum-shaped roller. Further, the number or arrangement position thereof is not particularly limited as long as they can be easily inserted into the guide post 6. Further, the ball 12a may be rotatably mounted or fixed. Although the stopper 13 has a ring shape in the above embodiment, it may have any shape as long as the ball retainer 12 does not fall off.
For example, in the guide bush 30 having the configuration shown in FIG. 3, a protrusion that protrudes inward may be provided on the guide post 6 side of the holding portion 32, and this protrusion may be configured to prevent the ball retainer 12 from falling off.

〔effect〕

As mentioned above, the die set guide device of the present invention includes a guide bush attached to the upper holder,
The guide post is attached to the lower holder part and is arranged at a position corresponding to the guide bush, and the guide bush slides between a large diameter part formed on the insertion side of the guide post and the guide post. The ball retainer has a slide bearing part that can be fitted freely, and a ball retainer having an inner diameter slightly larger than the outer diameter of the guide post is housed in the large diameter part via a stopper mechanism.

Therefore, when inserting the guide bushing into the guide post when assembling the upper holder part into the lower holder part, the insertion is guided by the ball retainer, making the insertion work extremely easy, and the guide bushing is inserted into the guide post. It will not damage any part of it. Afterwards, when the upper holder part moves up and down during press processing, etc., the guide post is slidably fitted into the sliding bearing part, so it has excellent load resistance and impact resistance, and is suitable for precision molds and large molds. It has the effect that it can also be applied.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of essential parts showing one embodiment of the guide device for a die set of the present invention, and FIG.
3 are enlarged cross-sectional views of main parts showing other embodiments of the present invention, FIG. 4 is a diagram showing an example of a conventional general die set, and FIGS. The figure is an enlarged sectional view of a main part of a conventional die set guide device. 1...Die set, 2...Upper holder part, 3...
Lower holder part, 6...Guide post, 10, 20,
30... Guide bush, 11a, 21a, 32a
...Large diameter portion, 11b, 22, 31... Sliding bearing portion, 12... Ball retainer, 13... Stopper (stopper mechanism).

Claims (1)

[Scope of utility model registration request] An upper holder part to which an upper mold of a press mold is attached, a lower holder part to which a lower mold is attached, and a guide device for a die set that guides the upper holder part to move up and down in accordance with the operation of the press machine, the guide device is composed of a guide bush attached to the upper holder part and a guide post disposed at a position corresponding to the guide bush attached to the lower holder part, the guide bush being formed on the insertion side of the guide post. The ball retainer has a large diameter portion and a sliding bearing portion that is slidably fitted to the guide post, and a ball retainer having an inner diameter slightly larger than the outer diameter of the guide post is attached to the large diameter portion via a stopper mechanism. A guide device for a die set, characterized in that it is housed in a die set.