JP2022100857A - Molding device - Google Patents

Abstract

To suppress aggravation of molding accuracy and suitably support a slide.SOLUTION: A molding device 1 includes a slide 30, and a plurality of uprights 20 for movably supporting the slide 30 in a predetermined movement direction. Each of the uprights 20 supports the slide 30 on both side faces 23a of a guide part 23 approximately parallel to a straight line R connecting the center of the slide 30 and the center of the upright 20, in a plane perpendicular to a vertical direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a molding apparatus.

Generally, in a molding apparatus, a material (work) arranged between two molds is molded by moving a slide to which one mold is fixed to a bed to which one mold is fixed. ..
The slide has a guide gap that allows it to slide smoothly with respect to the frame that guides the movement. This guide gap can cause misalignment between the two molds, so it is necessary to keep it as small as possible.

However, in the case of a so-called 8-sided guide that guides the slide on two sides along the front-back and left-right sides of each frame as described in Patent Document 1, for example (see FIG. 7A), the guide gap is large during operation. May change. That is, in this case, the deformation of the frame and the thermal deformation of the slide (for example, thermal expansion) under load occur substantially radially around the slide center (press center), so that the guide gap changes significantly during operation. It ends up.
Therefore, it is necessary to adjust the guide gap to a large initial value in anticipation of this change during operation, and as a result, the two molds may be largely misaligned and the molding accuracy may deteriorate.

Japanese Patent No. 6276361

The present invention has been made in view of the above circumstances, and an object of the present invention is to suppress deterioration of molding accuracy and to suitably support a slide.

The molding apparatus according to the present invention is
With slides
A plurality of pillars that movably support the slide in a predetermined moving direction,
Equipped with
Each of the plurality of pillars supports the slide with a plurality of support surfaces substantially parallel to a straight line connecting the center of the slide and the center of the pillar in a plane orthogonal to the moving direction.

According to the present invention, the slide can be suitably supported while suppressing deterioration of molding accuracy.

It is a figure which shows the molding apparatus which concerns on embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. (A) is a perspective view of the vicinity of the guide portion of the upright according to the embodiment, and (b) is a sectional view taken along line III-III of (a). It is a figure which shows the attachment structure of the slide and the give block which concerns on embodiment. It is sectional drawing of the sliding unit which concerns on embodiment. It is a figure which shows the deformation of a frame by a load at the time of a press. (A) is a diagram showing an eight-sided guide, and (b) is a diagram showing an X-type guide. It is a figure which shows the modification of the support structure of the slide which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Overall configuration of molding equipment]
FIG. 1 is a diagram showing a molding apparatus 1 according to the present embodiment.
As shown in this figure, the molding apparatus 1 according to the present embodiment is a pressing apparatus that drives a slide to form a workpiece. Specifically, the molding apparatus 1 includes a crown 11, a bed 12, a plurality of (four in this embodiment) uprights 20 erected between them, and a slide 30.
In the following description, front-back, left-right, and up-down refer to the directions shown in the figure.

The crown 11, the bed 12, and the plurality of uprights 20 constitute the frame 10 of the molding apparatus 1. The crown 11, the bed 12, and the plurality of uprights 20 are fastened to each other by inserting a tie rod 21 into the inside thereof and tightening the tie rod nut 22. The upright 20 corresponds to an example of a pillar according to the present invention.

A bolster 13 is fixed on the bed 12, and a lower mold 14 is fixed on the upper part of the bolster 13.
A cylinder 15 is provided on the crown 11, and a slide 30 is fixed to the cylinder 15. The slide 30 is supported by a plurality of uprights 20 so as to be able to move forward and backward (movable) in the vertical direction. Details of the support structure of the slide 30 will be described later.
The upper mold 16 is fixed to the lower part of the slide 30. As the cylinder 15 extends, the slide 30 descends, and the work is pressed by the upper mold 16 and the lower mold 14 to perform molding.

[Slide support structure]
2 is a cross-sectional view taken along the line II-II of FIG. 1, FIG. 3 (a) is a perspective view of the vicinity of the guide portion 23 described later in the upright 20, and FIG. 3 (b) is a view. 3 (a) is a cross-sectional view taken along the line III-III. 4 (a) and 4 (b) are views showing a mounting structure of the slide 30 and the give block 32 described later.
As described above, the slide 30 is supported by the four uprights 20 so as to be movable in the moving direction along the vertical direction.
As shown in FIGS. 2 and 3 (a) and 3 (b), the four uprights 20 are substantially evenly spaced from each other at the four corners diagonally, front, back, left, and right about the press center axis Ax along the vertical direction. It is erected with a space. Each upright 20 has a cross-sectional shape on a plane orthogonal to the vertical direction, which is axisymmetric with respect to a straight line R connecting the press center axis Ax and the center of the upright 20 (the center of the tie rod 21 in this embodiment). It has become. However, this shape does not have to be a completely line-symmetrical shape, and may be a substantially line-symmetrical shape. For example, when the dimension between the tie rods 21 in the left-right direction is 1, and the dimension between the tie rods 21 in the front-rear direction is within the range of 0.7 to 1.3, the shape is substantially axisymmetric.
In the following description, the direction perpendicular to the press central axis Ax is referred to as "diameter direction", and the rotation direction about the press central axis Ax is referred to as "circumferential direction".

Each upright 20 has a guide portion 23 for guiding the slide 30 on a surface on the inner diameter side (inside in the radial direction).
The guide portion 23 extends in the vertical direction over a range slightly longer than the movement range of the slide 30 at a height position slightly above the center of each upright 20.
The guide portion 23 is provided so as to project from the inner diameter side surface of the upright 20, and has both side surfaces 23a which are support surfaces for supporting the slide 30. The both side surfaces 23a are planes substantially parallel to the straight line R in the plane orthogonal to the vertical direction, and in the present embodiment, the planes substantially parallel to the plane including the press center axis Ax and the center of the upright 20. ..
The distance between the side surfaces 23a, that is, the guide width G is equal to or less than the diameter D of the tie rod 21. The diameter D of the tie rod 21 is defined according to the rated load of the molding apparatus 1, and is about 300 mm at a rated load of 300 tons and about 450 mm at a rated load of 6000 tons.
The portion of the guide portion 23 between the both side surfaces 23a is solid so that the both side surfaces 23a are not easily deformed. That is, in the upright 20, the space 20a into which the tie rod 21 is inserted is formed on the outer diameter side (diameter outer side) of the guide portion 23 (the portion between the both side surfaces 23a).

As shown in FIGS. 4A and 4B, the slide 30 is formed in the shape of a rectangular plate having a substantially square shape in a plan view, and is orthogonal to the press central axis Ax in a state where the center thereof coincides with the press central axis Ax. Arranged to do.
Four give blocks 32 are detachably attached to the four corners of the slide 30 diagonally, front, back, left, and right. The four give blocks 32 correspond to the four uprights 20 and are arranged between the corresponding uprights 20 and the slide 30.
Further, as shown in FIG. 2, the left-right (or front-back) width (maximum width) Ws of the slide 30 is smaller than the distance Wu between the uprights 20 adjacent to each other in this direction. Therefore, the slide 30 can be passed between the adjacent uprights 20 with the four give blocks 32 removed. The width Ws of the slide 30 and the distance Wu between the uprights 20 do not have to be the lengths in the directions corresponding to each other, and at least one of the distances between the uprights 20 adjacent to each other is all the give blocks 32. It may be larger than the width (maximum width) of the slide 30 in the removed state.

As shown in FIGS. 3A and 3B, a pull-back cylinder 17 is fixed to the upper surface of each give block 32. The rod tip of the pull-back cylinder 17 is fixed to the crown 11. As the pull-back cylinder 17 extends, the slide 30 rises and the upper mold 16 separates from the work. The pull-back cylinder 17 may be provided at another location. Alternatively, the slide 30 may be raised by the contraction of the cylinder 15 without providing the pull-back cylinder 17.

Each give block 32 has a U-shaped recess 32a in a plan view on the outer diameter side surface. Each give block 32 is movable in the vertical direction relative to the guide portion 23 by fitting the recess 32a in the radial direction with the guide portion 23 of the upright 20.
Among the give blocks 32, a plurality of sliding units 40 that slide with the guide portion 23 of the upright 20 are attached to both side walls 321 of the recess 32a. In this embodiment, four sliding units 40 are arranged along the vertical direction for each side wall 321.

FIG. 5 is a cross-sectional view of the sliding unit 40.
The sliding unit 40 extends substantially along the T direction orthogonal to the straight line R in the plane orthogonal to the vertical direction. In the following, the side of the upright 20 closer to the guide portion 23 in the T direction is referred to as “one end side”, and the side far from the guide portion 23 is referred to as “the other end side”.
Specifically, as shown in FIG. 5, the sliding unit 40 has a substantially cylindrical case member 41. The case member 41 is fixed to the side wall 321 of the give block 32.
A shaft member 42 is inserted into the case member 41 from one end side. The tip of the shaft member 42 on the other end side is exposed from the case member 41, and is fastened and fixed to the case member 41 by a large nut 43 screwed to the tip. Further, the shaft member 42 is urged to one end side with respect to the case member 41 by the elastic member 44 housed inside the case member 41. The elastic member 44 may be a spring member or a metal having a relatively low hardness, as long as it elastically supports the spherical member 46 described later via the shaft member 42.

A bolt 45 is inserted inside the shaft member 42.
The tip of the bolt 45 on the other end side is exposed from the shaft member 42, and the bolt 45 is fastened and fixed to the shaft member 42 by a small nut 48 screwed to the tip. However, an elastic member 49 (a disc spring in this embodiment) is sandwiched between the small nut 48 and the end face of the shaft member 42, and the shaft member 42 and the bolt 45 are within the range in which the elastic force acts. Relative movement is allowed.

A spherical member 46 is fixed to the tip of the bolt 45 on one end side. The spherical member 46 is supported by the guide portion 23, and is an example of the supported member according to the present invention. The surface on the other end side of the spherical member 46 is formed in a spherical shape, and is supported by the surface on one end side of the shaft member 42 which is formed in the corresponding spherical shape and can move (slide) relative to each other (that is, spherical support). ) Has been.
A sliding member 47 that slides with the guide portion 23 (side surface 23a) is attached to the surface on one end side of the spherical member 46. The sliding member 47 is made of a material (for example, a copper alloy) that is softer than the guide portion 23 of the upright 20. In the present embodiment, the guide gap S between the sliding member 47 and the side surface 23a of the guide portion 23 is adjusted to about 0.1 mm. Further, a groove (not shown) for interposing a lubricant (grease) with the side surface 23a of the guide portion 23 is formed on the surface on one end side of the sliding member 47.

[Technical effect of this embodiment]
As described above, according to the present embodiment, each upright 20 has two supports substantially parallel to the straight line R connecting the press center axis Ax and the center of the upright 20 in a plane orthogonal to the vertical direction. The slide 30 is supported by the surfaces (both sides 23a of the guide portion 23).
That is, as shown in FIG. 6, the deformation of the frame 10 (upright 20) under load occurs substantially radially around the press central axis Ax, and the thermal deformation (for example, thermal expansion) of the slide 30 is also omitted. Where they occur radially, the directions of these deformations and the side surfaces 23a of the guide portion 23, which is the support surface, are substantially parallel to each other. As a result, unlike the case of the eight-sided guide as shown in FIG. 7A, the change of the guide gap S during operation can be suppressed, and the initial value of the guide gap S at the time of assembly can be set small.
Therefore, the slide 30 can be suitably supported while suppressing the misalignment of the molds 14 and 16 and suppressing the deterioration of the molding accuracy.

Further, according to the present embodiment, since the both side surfaces 23a of the guide portion 23, which is the support surface in each upright 20, face each other in opposite directions, the load in the circumferential direction around the press central axis Ax is suitably supported. be able to.
That is, depending on the shape of the mold and the like, a reaction force in the circumferential direction around the press center axis Ax may act on the slide 30, but as shown in FIG. 7B, each frame faces the slide center 1 In the case of the X-shaped guide that guides the slide on the surface, the thermal deformation as described above can be suppressed, but the load in the circumferential direction cannot be received by all the supporting surfaces. For example, when a clockwise load in FIG. 7 (b) acts on the slide, this load is applied only to the upper right and lower left support surfaces in the figure, and the surface pressure is higher than that applied to all the support surfaces. Will rise. On the other hand, in the present embodiment, since the slide 30 is supported by the side surfaces 23a of the guide portions 23 facing in opposite directions, each frame 10 (upright) is applied to a load in the circumferential direction in any direction. This can be supported by one support surface per 20). Therefore, the slide 30 can be more preferably supported.

Further, according to the present embodiment, since the portion of each upright 20 between the side surfaces 23a of the guide portion 23 is solid, the deformation of the side surface 23a can be suppressed as compared with the case where the portion is hollow. .. Therefore, even when the slide 30 or the upright 20 is loaded, the slide 30 can be guided more accurately.

Further, according to the present embodiment, both side surfaces 23a of the guide portion 23 are provided on the inner diameter side portion of each upright 20.
As a result, the guide width G can be reduced as compared with the case where both side surfaces 23a (guide portions 23) are provided on the side portions of the upright 20. As a result, the processing accuracy of both side surfaces 23a can be improved, and the guide gap S can be set to be smaller with higher accuracy.

Further, according to the present embodiment, the spherical member 46 supported on the side surface 23a of the guide portion 23 is spherically supported on the surface opposite to the guide portion 23.
As a result, the spherical member 46 changes its inclination so as to follow the deformation of the side surface 23a of the guide portion 23 in any direction regardless of whether it is assembled or operated. Therefore, the slide 30 can be more preferably supported. Further, it is possible to relax the machining accuracy such as flatness and parallelism required for the side surface 23a of the guide portion 23.

Further, according to the present embodiment, since the spherical member 46 is supported by the elastic member 44 arranged on the side opposite to the side surface 23a of the guide portion 23, the initial value of the guide gap S at the time of assembly is made smaller. Can be set. For example, the initial value of the guide gap S can be set to zero, and a preload can be further applied.

Further, according to the present embodiment, each upright 20 is formed in a line-symmetrical shape with respect to a straight line R connecting the press center axis Ax and the center of the upright 20 in a plane orthogonal to the vertical direction. There is.
As a result, deformation of the guide gap S due to load or heat can be suppressed more reliably.

Further, according to the present embodiment, the distance Wu between the four uprights 20 and the adjacent objects is larger than the width Ws of the slide 30 with the four give blocks 32 removed.
As a result, the slide 30 can be passed between the uprights 20 with the four give blocks 32 removed. Therefore, the slide 30 and the give block 32 can be taken out of the frame 10 or incorporated into the frame 10 without disassembling the frame 10.

[others]
Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.
For example, in the above embodiment, the recess 32a of each give block 32 is fitted to the guide portion 23 projecting from each upright 20, but the relationship between the unevenness may be reversed. That is, as shown in FIG. 8, each give block 32 is provided with a convex guide portion 33 toward the outer diameter side instead of the concave portion 32a, and each upright 20 is provided with an inner diameter side instead of the guide portion 23. A recess 24a may be provided in the recess 24a. Then, the guide portion 33 of each give block 32 and the recess 24a of each upright 20 may be combined. Even in this case, the sliding unit 40 is provided on the give block 32 (slide side) (for example, it is built in the guide portion 33). However, the sliding unit 40 may be provided on the upright 20 (for example, it may be attached to the side wall 24 of the recess 24a and slid with both side surfaces of the guide portion 33).

Further, in the above embodiment, each upright 20 has both side surfaces 23a of the guide portion 23 as two support surfaces facing in opposite directions, but three or more supports including such two support surfaces. It may have a surface.

Further, in the above embodiment, the four uprights 20 are arranged at equal intervals in the front, back, left and right, but the arrangement is not limited to this. For example, the distance between the front and back of the four uprights 20 and the distance between the left and right may be different. Further, the number of uprights 20 is not limited as long as they are plural.

Further, in the above embodiment, a plurality of uprights 20 erected in the vertical direction support the slide 30, but the plurality of pillars according to the present invention support the slide so as to be movable in a predetermined moving direction. Anything is fine. That is, the extending direction of the plurality of pillars and the moving direction of the slide do not have to be the vertical direction.

Further, in the above embodiment, the press device has been described as the molding device, but the molding device according to the present invention is not limited to the press device as long as it includes a moving slide for molding, and is, for example, an injection molding device. It can also be applied to.
In addition, the details shown in the above-described embodiment can be appropriately changed without departing from the spirit of the invention.

1 Molding equipment 10 Frame 11 Crown 12 Bed 20 Upright (pillar)
21 Tie rod 23 Guide part 23a Side surface (support surface)
30 Slide 32 Give block 32a Recess 321 Side wall 40 Sliding unit 42 Shaft member 44 Elastic member 46 Spherical member (supported member)
47 Sliding member Ax Press center axis D Tie rod diameter G Guide width R Straight line S Guide gap Ws Slide width Wu Distance between uprights

Claims (8)

With slides
A plurality of pillars that movably support the slide in a predetermined moving direction,
Equipped with
Each of the plurality of pillars supports the slide with a plurality of support surfaces substantially parallel to a straight line connecting the center of the slide and the center of the pillar in a plane orthogonal to the moving direction.
Molding equipment. The plurality of support surfaces include two support surfaces facing in opposite directions.
The molding apparatus according to claim 1. Each of the plurality of columns is solid in the portion between the two support surfaces.
The molding apparatus according to claim 2. The two support surfaces are provided on the central portion of the slide among each of the plurality of pillars.
The molding apparatus according to claim 2 or 3. A supported member attached to the slide and supported by the support surface is provided.
The surface of the supported member opposite to the surface facing the support surface is spherically supported.
The molding apparatus according to any one of claims 1 to 4. The supported member is supported by an elastic member arranged on the side opposite to the support surface.
The molding apparatus according to claim 5. Each of the plurality of pillars is formed in a substantially line-symmetrical shape with respect to the straight line in a plane orthogonal to the moving direction.
The molding apparatus according to any one of claims 1 to 6. A plurality of give blocks detachably attached to the slide and arranged between the plurality of pillars and the slide.
The plurality of pillars have at least one of the distances between adjacent ones larger than the width of the slide with the plurality of give blocks removed.
The molding apparatus according to any one of claims 1 to 7.

Images