JPH08206895A - Slide guide device for press machine - Google Patents

Abstract

PURPOSE: To obtain a slide guide device for press machine which can absorb the displacement caused by thermal expansion of a slide and has simple structure. CONSTITUTION: The base axis parts 3 of guide posts 2 are rotatably supported at the four corners of the slide 1 and an eccentric axis part 5 each extending downward eccentrically with respect to the base axis part 3 are slidably guided in the vertical direction with a stroke bearing 8 and a guide bush 9 in a guide block 7 fitted to a bed 6. The respective guide blocks 7 are fitted in an angular relation of the direction of eccentricity between the center 3A of the part 3 and the center 5A of the part 5 of between the center of the guide 7 and the center 5A so that the slide 1 is guided freely movably in a vertical direction perpendicular to the direction of thermal expansion of the slide 1 while keeping the center of the slide 1 at a fixed position to constitute the slide guide device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a slide guide device of a press machine having slides which are vertically movably guided by a plurality of guide posts.

[0002]

2. Description of the Related Art In the prior art, a slide guide device of a press machine in which slides are vertically movably guided by a plurality of guide posts has a plurality of guide posts fixed between a crown of the press machine and a bed. It is often used that the guide post is provided with a slidable slide, and the slide is connected to a crank shaft provided on a crown by a connecting rod to drive up and down.

Further, in the press machine disclosed in Japanese Utility Model Laid-Open No. 4-47897, the upper and lower intermediate parts of the post guide are eccentric parts having a certain amount of eccentricity with respect to the support part of the crown and bed, and the eccentric part slides. Guides vertically, and supports expansion and contraction of the slide vertically and at right angles.
I am trying to displace the post guide.

[0004]

In the case of fixing a plurality of guide posts in the above-mentioned prior art between the crown and the bed of the press machine, the slide expands and contracts in the direction perpendicular to the guide posts, that is, during operation of the press machine. In addition, when the slide expands or contracts due to heat generated by friction of each part or a change in ambient temperature of the press machine, there is a drawback that the slide and the guide post do not slide smoothly.

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

The object of the present invention is to eliminate the above drawbacks, to accommodate expansion and contraction of the slide in the direction perpendicular to the guide post, and to improve the structure to eliminate the space limitation of the crown portion. To provide.

[0007]

In order to achieve the above-mentioned object, a base shaft portion in which the vertical direction is directed is rotatably supported at a required position of a slide, and the base shaft portion is eccentric with a constant eccentric amount. A plurality of guide posts that extend the eccentric shaft portion downward are provided, and a plurality of guide blocks that are installed in the bed corresponding to the respective guide posts and that guide the eccentric shaft portion slidably in the vertical direction are provided. The eccentric direction of the eccentric shaft part of the guide post with respect to the base shaft part has an angular relationship in which the center of the slide is guided in a vertically movable manner corresponding to the thermal expansion direction of the slide. A guide block is disposed in the slide guide device of the press machine having a slide guided vertically by a plurality of guide posts.

[0008]

In 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. Since the slide can be horizontally moved in the displacement direction and the displacement of the slide can be absorbed, 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 portion on the crown side, and the structure is simple.

[0010]

1 to 3 show an embodiment of the present invention. At the four corners of the slide 1, the base shaft portion 3 of the guide post 2 is oriented vertically, and the needle bearing 4 with the thrust bearing is provided.
It is freely rotatable at 4. The guide post 2 has a base shaft portion 3.
Has an eccentric shaft portion 5 that continuously extends downward, and a center 5A of the eccentric shaft portion 5 is eccentric with respect to a center 3A of the base shaft portion 3 by an eccentric amount e.

A guide block 7 corresponding to each guide post 2 is installed on the bed 6, and an eccentric shaft portion 5 of the guide post 2 is mounted by a vertical stroke bearing 8 and a guide bush 9 provided on the guide block 7. Guides are slidable.

FIG. 2 shows the positions of the center 3A of the base shaft portion 3 of the guide post 2 supported at the four corners of the slide 1 and the center 5A of the eccentric shaft portion 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 the slide 1 is eccentric from the front direction or the rear direction to the inside of the slide 1 in the left-right direction at an angle θ, and the thermal expansion direction C is perpendicular to the direction. I am trying to become.

As shown in FIG. 3, the eccentric shaft portion 5 or the guide block 7 of the guide post 2 fixed to the bed 6 side.
The center 3A of the base shaft 3 is different from the center 5A of the eccentric shaft 5
Alternatively, the guide block 7 is moved within the range of the angle α from the center 5A of the guide block 7 within the radius (e) by the 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 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, the displacement in the perpendicular direction Y = 0.0043 mm, the displacement in the thermal expansion direction of the slide 1 can be substantially absorbed, and the influence of the displacement in the perpendicular direction in the Y direction can be ignored.

The center 3A of the base shaft portion 3 of the guide post 2 and
It is obvious that the eccentric direction with respect to the eccentric shaft portion 5 or the center 5A of the guide block 7 may be the opposite direction to that shown in FIG. 2 or may have another constant angular relationship.

[0017]

As is apparent 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 to the direction perpendicular to the thermal expansion direction of the slide, so that the slide is moved. Even if it expands and contracts due to thermal expansion, it can absorb the displacement and maintain the center of the slide at a fixed position,
You can guide up and down.

Further, by providing the guide post and the guide block on the slide and the bed, there are no parts to be attached on the crown side, and the structure is simplified.

[Brief description of 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 portion of a slide showing an angular relationship of guide posts in an eccentric direction.

FIG. 3 is an explanatory diagram showing 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 portion, 3A is a center of the base shaft portion 3, 4 is a needle bearing with a thrust bearing, 5 is an eccentric shaft portion, 5A is a center of the eccentric shaft portion 5 or a guide block 7, and 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)

[Claims] 1. A slide guide device of a press machine having a slide which is vertically movably guided by a plurality of guide posts, wherein a base shaft portion is rotatably supported with its main portion oriented vertically. Providing a plurality of the guide posts that extend the eccentric shaft portion that is eccentric to the base shaft portion by a constant eccentric amount, is installed on the bed corresponding to each of the guide posts, and the eccentric shaft portion is A plurality of guide blocks that slidably guide in the vertical direction are provided, and the eccentric direction of each eccentric shaft portion of the guide post with respect to the base shaft portion corresponds to the thermal expansion direction of the slide and the center of the slide. The guide block is arranged so as to have an angular relationship in which the guide block is guided movably in the vertical direction while maintaining the fixed position. Machine of the slide guide apparatus.