JP2000176697A - Slide column for press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide column resistant to bending moment and sufficient in cost performance. SOLUTION: In this slide column in which both ends of the slide column 6 freely slidably supported with a bed are fixed with frames 4, 5, a distance between the bed and one side of frame 4 is changed and a material to be pressed between the bed and the other side of frame 5 is compressed, the slide column is composed of an inner column 9 whose both ends penetrate the both frames 4, 5 and the frames 4, 5 are pushed and stopped with nuts 11 at the tip ends, and outer column 10 whose inner part is penetrated with the inner column 9 and whose both ends are fitted into the both frames 4, 5. The cross section shape of the outer column 10 is a circle in the fitting part within the frames and is turned from the circle into a square at the positions where the outer column just leaves the frames 4, 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press slide column.

[0002]

2. Description of the Related Art A straight-side press or a pull-down press has a structure in which upper and lower ends of a slide column are fixed by connecting members. FIG. 8 is a structural view of a press having a pull-down type slide column. A pressurizing cylinder 2 is disposed vertically below a bed 1 fixed to a foundation (not shown). A main ram 3 is provided inside the pressurizing cylinder 2, and protrudes downward by supplying a high-pressure hydraulic fluid to the pressurizing cylinder 2 from a hydraulic pump (not shown).

The lower part of the main ram 3 is a bottom frame 4
(Connecting material). A top frame 5 (connecting material) is provided on the upper part of the bed 1, and the top frame 5 and the bottom frame 4 are fixed by a slide column 6. At both ends of the bed 1, a slide column 6 slidably penetrates, and by actuating the main ram 2, this force is transmitted to the top frame 5 via the slide column 6, and the pressed plate installed on the top of the bed 1 is pressed. The material 7 is compressed by the top frame 5. An ascending cylinder 8 is provided between the bed 1 and the bottom frame 4 to raise the bottom frame 4 lowered by the main ram 3 to return to the original position.

The slide column 6 comprises an inner column 9 having a circular cross section and an outer column 10 having a circular cross section through which the inner column 9 penetrates.
, And each frame 4, 5 is held down by a nut 11 at both ends. The outer column 10 has two frames 4 and 5 at the tip.
Even if an unbalanced force is generated at the time of pressing and a bending moment is generated, the bending moment applied to the outer column 10 is suppressed by this fitting portion.

[0005]

The outer column has a circular outer cross-sectional shape in order to fit both ends to the frames 4 and 5, and the inner column 9 penetrates the inside. Material is machined at both ends and inside. For this reason, the cost of material and processing is considerable. For this reason, as shown in FIG. 9, the outer column may have a square structure made of a steel plate stopped on the outside of the frame. However, if a large bending moment is generated by an unbalance force in the press, the structure cannot withstand this. ing. This form may be used when the bending moment is small.

The present invention has been made to solve such a problem. That is, an object of the present invention is to provide a slide column that withstands a large bending moment and is cost effective.

[0007]

In order to achieve the above object, according to the present invention, in a slide column of a press in which upper and lower ends of a slide column are connected by connecting members, both ends of the slide column are connected by the connection member. It consists of an inner column that penetrates the material and holds the connecting material with a nut at the tip, and an outer column that penetrates the inside and fits the upper and lower connecting materials at both ends. The shape is circular at the fitting portion in the connecting member, and is more square than circular at the position where the connecting member protrudes.

Since the section of the outer column inside the connecting member has a circular cross section, it is easy to drill a hole on the connecting member side, and since it has a fitting portion, it can withstand a bending moment. Also, since the outside of the connecting member is square, it can be easily manufactured using a plate material or the like.

According to the second aspect of the present invention, the outer column of the first aspect is made of an integral material up to a position where the connecting member comes out from the tip to become a quadrangle rather than a circle, and an intermediate square portion is made of a steel plate. I do.

[0010] The part from the connecting material of the outer column until the cross-sectional shape changes from circular to square is made of an integral material such as a forged material or a machined material, and the remaining part outside the connecting material is rectangular. It is composed of steel plate. As a result, parts that do not fit into the connecting member can be assembled with a steel plate, so that material costs and machining costs are significantly reduced as compared with the case of using an integrated material such as a forged material or a machined material.

According to a third aspect of the present invention, in the slide column of the press in which the upper and lower ends of the slide column are respectively connected by connecting members, the slide column has both ends penetrating through the connecting member and the connecting member is stopped at the tip by a nut. And an outer column whose inside is penetrated by the inner column and whose both ends are fitted to the upper and lower connecting members. The cross-sectional shape of this outer column is It is circular and becomes quadrilateral after that, and it is also quadrilateral outside the connecting material.

Since the cross-sectional shape of the distal end portion of the outer column in the connecting member is circular, it is easy to drill a hole on the connecting member side.
After that, it is inside the connecting member and is rectangular, but the processing is not so difficult because it is close to the entrance. Since it has a fitting portion, it can withstand a bending moment. In addition, the cylindrical part that is relatively weak to bending moment is only the tip part where the value of bending moment is small, and thereafter it is a square that is strong in bending moment even in the connecting material, so it can withstand even large bending moment value enough It is a structure that can be done. Further, since the outside of the connecting member is also rectangular, the structure is such that it can sufficiently withstand a bending moment. The square portion inside and outside the connecting member of the outer column can be made of a plate material, so that the processing becomes easy.

According to a fourth aspect of the present invention, the outer column of the third aspect is made of an integral material up to a position where the outer column becomes a square from the circular cross section at the tip, and a middle square portion is made of a steel plate.

The part of the connecting material of the outer column until the cross-sectional shape of the connecting material is changed from a circle to a square is an integral material such as a forged material or a machined material, and the inner and outer parts of the connecting material thereafter are made of a steel plate because they are square. I do. By expanding the range that can be manufactured from this steel sheet, material costs and machining costs are significantly reduced.

According to a fifth aspect of the present invention, the inside of the steel plate constituting the outer column of the second or fourth aspect is provided with a concave portion corresponding to the outer diameter of the inner column.

The rectangular portion of the outer column is made of a steel plate, and the inner column penetrates the inside. The square shape is determined so that the inside of this steel plate does not hit the outer diameter of the inner column.In this case, it is necessary to reduce the outer shape of the square by providing a concave portion on the inner surface of the steel plate according to the outer diameter of the inner column. it can.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1A and 1B show a slide column according to a first embodiment, in which FIG.
Is a perspective view of a tip portion, and (C) is a cross-sectional view taken along a diagonal line of (B). FIG. 2 is a cross-sectional view at each cutting position in FIG. Although the press using the slide column of the first and second embodiments will be described as a pull-down type shown in FIG. 8, the slide column of the present invention can be applied to a press using a slide column. In the pull-down type, the connecting material is called a frame, while in the straight side type, the upper connecting material is called a crown and the lower connecting material is called a bed. The same reference numerals as those in FIG. 8 indicate the same components. An internal column 9 is provided through the bottom frame 4 and the top frame 5, and each of the frames 4, 5 is held down by a nut 11 provided at the tip.

The distal end of the outer column 10 is
5 is fitted in the hole provided. This frame 4,5
The hole provided at the center portion 12 has a large hole diameter at the central portion 12 and is fitted to the outer column 10 at the tip and the base. External column 1
Numeral 0 is composed of a tip 10a and a trunk 10b.
a is a cylindrical portion and a portion changed from a cylinder to a quadrangular prism, and is made of a forged material or a cut material. The body 10b is a portion after the portion connected to the square pillar of the tip 10a, and is configured by joining four steel plates. The cylindrical outer shape and the inner hole of the tip portion 10a are machined. The joining of the four steel plates of the body 10b and the joining with the tip 10a are performed by welding.

FIG. 3 shows a cross section of the body 10b. Torso 10
b is formed using four steel plates, and the internal column 9 penetrates the internal space with a gap. (A) is a case where a steel plate is used as it is. In this case, the outer shape of the trunk portion 10b becomes large. (B) shows the case where the inner surface of the steel plate is cut into an arc shape,
(C) is a case where the inner surface of the steel plate is cut into a polygon, and (D) is a case where the inner surface of the steel plate is cut into a square.
Can be made smaller.

FIGS. 4A and 4B show a slide column according to a second embodiment, in which FIG. 4A is a cross-sectional view of the tip, FIG. 4B is a perspective view of the tip, and FIG. 4C is a cross-sectional view of FIG. Is shown. FIG.
4A is a cross-sectional view at each cutting position in FIG. The same reference numerals as those in FIG. 8 indicate the same components. In the second embodiment, the length of the tip portion 100a made of a forged material or a machined material is shorter than that of the first embodiment, and a square body 100b is formed.
Also partially enter the frames 4 and 5 and are fitted to the frames 4 and 5.

The tip and the trunk of the outer column 10 are fitted into holes provided in the frames 4 and 5, respectively. The holes provided in the frames 4 and 5 have a large diameter at the central portion 120 and are fitted to the outer column 10 at the tip and the base.
The outer column 10 includes a tip portion 100a and a body portion 100b. The tip portion 100a includes a cylindrical portion and a portion changed from a cylinder to a quadrangular prism, and is formed of a forged material or a machined material, and is located in a frame. The body portion 100b is a portion connected to the quadrangular prism of the tip portion 100a and is formed by joining four steel plates, and the vicinity of the connection portion with the tip portion 100a is located in the frame. The cylindrical outer shape and the inner hole diameter of the distal end portion 100a are machined. The joining of the four steel plates of the body portion 100b and the joining with the tip portion 100a are performed by welding. The outer surfaces of the portions of the body 100b located in the frames 4, 5 are machined. As shown in the A4 section in FIG. 5, the outer shape of the body 100b in the A4 section is a square with a reduced angle, and therefore the frame hole is also machined into a square corresponding to this. In addition, the central part 120 is A2-1, A of FIG.
The cross section may be square as shown in 3-1.

FIG. 6 shows a view in which the shape of the portion made of the forged material or the cut material shown in FIG. 4B is changed. Since the portion of the outer column 10 that is fitted to the frames 4 and 5 is a portion to which a large bending moment is applied, the portion that changes into a quadrangle from a cylinder is made longer so as to change smoothly.

FIG. 7 shows a frame 5 shown in a section A4 in FIG.
4A shows a case where a liner is inserted in a fitting portion between the body portion 100b, (A) shows a case of a straight liner 130, and (B) shows a case of a taper liner 140. By using the liner, the body 100b and the frames 5, 4
The gap with the opening provided in the hole can be accurately adjusted. By using the taper liner 140, it is easy to make the gap zero.

[0024]

As described above, according to the present invention, the outer column is fitted to the frame to withstand the bending moment, and only the tip portion of the outer column is formed as an integral material such as a forged material or a cut material. By forming the other part in a square shape and using a steel plate, material costs and machining costs can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of each cutting position in FIG.

FIG. 3 shows a cross section of the body of the outer column.

FIG. 4 is a diagram showing a configuration of a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of each cutting position in FIG.

FIG. 6 shows a shape in which a portion that changes from a cylindrical shape to a quadrangular prism is made gentle.

FIG. 7 shows a case where a liner is used for a fitting portion between a frame and an external column.

FIG. 8 shows a structure of a press using a slide column.

FIG. 9 shows an example of the structure of a conventional slide column.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bed 2 Processing cylinder 3 Main ram 4 Bottom frame 5 Top frame 6 Slide column 7 Pressed material 8 Ascending cylinder 9 Inner column 10 External column 10a Tip 10b Body 11 Nut 12 Center 100a Tip 100b Body 120 Center 130 Straight liner 140 Taper liner

Claims (5)

[Claims] 1. A slide column for a press in which upper and lower ends of a slide column are connected by connecting members, respectively, wherein the slide column has both ends penetrating through the connecting member and the connecting member being held at a tip by a nut. And an outer column whose inside is penetrated by this inner column and whose both ends are fitted to the upper and lower connecting members. The cross section of the outer column is circular at the fitting portion in the connecting member, and the connecting member exits. A press slide column characterized by being more square than round at the right position. 2. The outer column is formed of an integral material up to a position where the connecting member protrudes from the tip to a position where the outer column becomes a quadrangle rather than a circle, and a middle square portion is formed of a steel plate. The slide column of the press according to 1. 3. A slide column of a press in which upper and lower ends of a slide column are connected by connecting members, respectively, wherein said slide column has both ends penetrating through said connecting member, and the connecting member is held at its tip by a nut. And an external column in which the internal column penetrates the inside and both ends are fitted to the upper and lower connecting members.
A slide column for a press, characterized in that at the fitting portion inside the connecting member, the tip portion is circular and thereafter square, and outside the connecting member is also square. 4. The press according to claim 3, wherein the outer column is made of a single piece of material up to a position where the outer column becomes a square from the circular cross section at the tip, and a middle square portion is made of a steel plate. Slide column. 5. The slide column for a press according to claim 2, wherein a concave portion is provided on an inner side of the steel plate forming the outer column so as to correspond to an outer diameter of the inner column.