JP2840928B2 - Slide machine for press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a slide guide device for a press machine having a slide guided by a plurality of guide posts so as to be vertically movable.

[0002]

2. Description of the Related Art In the prior art, a slide guide device of a press machine in which a slide is guided by a plurality of guide posts so as to freely move in a vertical direction, a plurality of guide posts are fixed between a crown of the press machine and a bed, A slidable slide is provided on the guide post, and the slide is connected to a crankshaft provided on the crown by a connecting rod, and is driven up and down by driving.

In a press machine disclosed in Japanese Utility Model Laid-Open Publication No. 4-47897, an upper and lower intermediate portion of a post guide is formed as an eccentric portion having a certain amount of eccentricity with respect to a crown and a bed supporting portion, and the eccentric portion slides. Guide up and down, corresponding to the vertical expansion and contraction of the slide at right and left,
The post guide is displaced.

[0004]

When a plurality of guide posts according to the prior art described above are fixed between a crown and a bed of a press machine, slides extend and contract in a direction perpendicular to the guide posts, that is, during operation of the press machine. In addition, when the slide expands and contracts due to the heat generated by the friction of each part or the change in the ambient temperature of the press machine, the slide between the slide and the guide post is not smooth.

The press machine disclosed in Japanese Utility Model Laid-Open No. 4-47897 can cope with expansion and contraction due to a change in slide temperature. However, since both ends of the post guide are rotatably supported by the crown and the bed, respectively, However, there are drawbacks in that the structure is complicated and that there are many restrictions on the space for providing the structure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a slide guide device for a press machine which can cope with expansion and contraction of a slide in a direction perpendicular to a guide post and which has improved structure to eliminate restrictions on the space of a crown portion. Is to provide.

[0007]

In order to achieve the above-mentioned object, a vertical base shaft portion is rotatably supported at a required position of a slide, and is eccentric with respect to the base shaft portion by a constant eccentric amount. A plurality of guide posts are provided in which the eccentric shaft portions are extended downward, and a plurality of guide blocks are installed on the bed corresponding to the respective guide posts and guide the eccentric shaft portions slidably in the vertical direction. The eccentric direction of the eccentric shaft portion of the guide post with respect to the base shaft portion has an angular relationship corresponding to the direction of thermal expansion of the slide so that the center of the slide is maintained at a fixed position and guided movably in the vertical direction. A guide block is disposed on the guide post to constitute a slide guide device of a press machine having a slide guided by a plurality of guide posts so as to be movable up and down.

[0008]

According to the slide guide device of the press machine of the present invention constructed as described above, even if the slide is displaced by thermal expansion, the center of the base shaft portion of the guide post is thermally expanded with respect to the center of the eccentric shaft portion. The slide can be moved horizontally in the displacement direction and the displacement of the slide can be absorbed, so that the slide is stably guided in the vertical direction.

Also, since the guide post is provided between the slide and the bed, there is no support on the crown side, and the structure is simplified.

[0010]

1 to 3 show an embodiment of the present invention. At the four corners of the slide 1, the base shaft 3 of the guide post 2 is turned up and down, and the needle belling 4 with a thrust bearing,
4 makes it freely rotatable. The guide post 2 has a base shaft 3
The center 5A of the eccentric shaft 5 is eccentric with respect to the center 3A of the base shaft 3 by the amount of eccentricity e.

A guide block 7 corresponding to each guide post 2 is installed on a bed 6, and the eccentric shaft 5 of the guide post 2 is fixed by a vertical stroke bearing 8 and a guide bush 9 provided on the guide block 7. It is slidably guided.

FIG. 2 shows the position of the center 3A of the base shaft 3 of the guide post 2 supported at the four corners of the slide 1 and the center 5A of the eccentric shaft 5 or the guide block 7.
The eccentric direction of the eccentric shaft portion 5 or the center 5A of the guide block 7 with respect to the center 3A of the base shaft portion 3 of the guide post 2 is perpendicular to the thermal expansion direction C at each corner of the slide 1.

The positional relationship shown in FIG. 2 is an example, and is decentered from the front or rear of the slide 1 to the inside of the slide 1 in the left-right direction at an angle θ, so that the thermal expansion direction C is perpendicular to the direction perpendicular to the thermal expansion direction C. I am trying to become.

As shown in FIG. 3, the eccentric shaft 5 of the guide post 2 fixed to the bed 6 or the guide block 7
The center 3A of the base shaft portion 3 is
Alternatively, the slide 1 moves on a circular arc having a radius (e) from the center 5A of the guide block 7 by an assumed thermal expansion of the slide 1.

At this time, the center 3A of the base shaft portion 3 of the guide post 2 moves by X in the thermal expansion direction and by Y in the direction perpendicular thereto, but the displacement Y in the direction perpendicular to the displacement X is extremely small. For example, as an actual measurement example, when the eccentricity e = 0.5 mm and the angle θ = 15 °, the displacement X =
0.13 mm, and the displacement Y in the perpendicular direction is 0.0043 mm. Thus, the displacement in the thermal expansion direction of the slide 1 can be substantially absorbed, and the influence of the displacement Y in the perpendicular direction can be ignored.

A center 3A of the base shaft 3 of the guide post 2;
It is clear that the eccentric direction with respect to the eccentric shaft portion 5 or the center 5A of the guide block 7 may be opposite to the direction shown in FIG.

[0017]

As is clear from the above description, according to the present invention, the eccentric direction between the base shaft portion and the eccentric shaft portion of the guide post is set at a right angle to the direction of thermal expansion of the slide. Even if it expands and contracts due to thermal expansion, it can absorb the displacement and maintain the center of the slide at a certain position,
It can be guided up and down.

In addition, since the guide post and the guide block are provided on the slide and the bed, there are no parts to be mounted on the crown side, and the structure is simplified.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a main part of a slide guide device of a press machine according to an embodiment.

FIG. 2 is a plan view of a main part of a slide showing an angular relationship of an eccentric direction of a guide post.

FIG. 3 is an explanatory view showing the movement of the center of the base shaft portion with respect to the center of the guide post.

[Explanation of symbols]

1 is a slide, 2 is a guide post, 3 is a base shaft, 3A is a center of the base shaft 3, 4 is a needle bearing with a thrust bearing, 5 is an eccentric shaft, 5A is a center of the eccentric shaft 5 or a guide block 7, 6 Is a bed, 7 is a guide block, 8 is a stroke bearing, 9 is a guide bush,
C is the direction of thermal expansion, E is the amount of eccentricity, X and Y are displacements due to thermal expansion, and α and θ are angles.

Claims (1)

(57) [Claims] 1. A slide guide device of a press machine having a slide which is guided by a plurality of guide posts so as to be movable in a vertical direction, wherein a base shaft portion is rotatably supported at a main portion of the slide in a vertical direction, A plurality of guide posts are provided in which an eccentric shaft portion eccentric with a constant eccentric amount is extended downward with respect to the base shaft portion, and the guide posts are installed on a bed corresponding to the respective guide posts, and the eccentric shaft portion is provided. A plurality of guide blocks are provided so as to be slidable in the vertical direction, and the eccentric direction of the eccentric shaft portion of each guide post with respect to the base shaft portion corresponds to the direction of thermal expansion of the slide. The guide block is arranged so that the guide block has an angular relationship in which the guide block is guided so as to be movable up and down while maintaining a predetermined position. Machine of the slide guide apparatus.