JP2594849B2 - Finishing method of annular plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for finishing an annular plate, and more particularly to a method for improving the flatness of an annular plate having a large diameter. In order to reduce the size of the finishing device and to reduce the processing force at the time of finishing, it is possible to perform the finishing under the condition that the processing force acts on a part of the annular plate.

[0002]

2. Description of the Related Art A steel pipe for piping, particularly a steel pipe having a large diameter, is often provided with a flange in order to simplify connection at the time of piping. Such an annular plate such as a flange is formed into an endless ring by finishing a belt-like steel material into an annular shape and connecting both ends by welding or the like. In the case of an annular plate manufactured by such a method, the flatness of the constituent plane is not always accurate, and the finishing accuracy is insufficient. In order to increase the flatness of such an annular plate, an apparatus as disclosed in Japanese Utility Model Laid-Open Publication No. 1-165109 is conventionally used. In this apparatus, an annular plate is placed on a head, and the upper surface thereof is pressed by a pressing roller to smooth the surface. The pressing roller is composed of a plurality of pressing rollers arranged radially, and the pressing roller group is mounted for elevating and driven to revolve by a driving device. Since the lower generatrix of each of the pressing roller groups is arranged so as to constitute one plane, during the finishing method, the annular plate and the orbit of the pressing roller are set coaxially. The pressing rollers are revolved in a state in which the pressing rollers are pressed against the upper surface of the annular plate by lifting and lowering, thereby smoothing the upper surface of the annular plate in contact with each roller.

However, in the case of this prior art, the working force at the time of finishing is relatively large. In other words, the pressing force when pressing the pressing roller group equally over the entire area of the annular plate is large, and the driving force for revolving each pressing roller around the elevating shaft is large. In the case of the one corresponding to a small size, the working force does not become a big problem, but in the case of the finish corresponding to the large-sized annular plate, the working force described above is extremely increased, and Increase in size.

[0004] The present invention has been made in view of the above points, and is described as "Finishing of the annular plate R which is finished to improve the flatness of the annular plate R while supporting the annular plate R in a horizontal posture. Method], it is an object of the present invention to reduce the working force at the time of finishing. [About the invention of claim 1]

[0005]

The technical means of the present invention taken to solve the above-mentioned problem is that "a tapered upper roller 1 and a similar tapered lower roller 2 are alternately arranged along the circumferential direction of the annular plate R. The rotation axis of each upper roller 1 and each lower roller 2
The upper roller 1 and the lower roller 2 are disposed so that the rotation axis of the upper roller 1 and the lower roller 2 intersect on the central axis of the annular plate R, and a roller group including the upper roller 1 and the lower roller 2 is arranged in the circumferential direction. The set roller arrangement area is set to a certain range in the circumferential direction, and a substantially similar area on the opposite side is a support area provided with support means for rotatably supporting the annular plate R. Other areas between the support areas,
The lower generatrix of the upper rollers 1 and the upper generatrix of the lower rollers 2 and 2 coincide with a horizontal plane, and all or a part of the upper roller 1 and the lower roller 2 are rotationally driven to rotate the upper roller and the lower roller. The flatness of the annular plate R is improved by passing the annular plate R between the rollers and adjusting the flexural strength at each passing point when passing through the roller group to a predetermined degree. "
That is.

[0006]

The above technical means of the present invention operates as follows. The generatrix below the upper rollers 1 and 1 and the generatrix above the lower rollers 2 and 2 are respectively arranged on one horizontal plane. When the annular plate R is passed between these tapered rollers, the annular plate R is repeatedly bent during this time. Since the relative positions of the upper roller 1 and the lower roller 2 have been adjusted to a predetermined relationship in advance, the planar state of the annular plate R is improved and smoothed during repeated bending as described above. This operation is similar to that of a so-called roller leveler.

In the roller arrangement area, both the upper rollers 1, 1 and the lower rollers 2, 2 are disposed so that their axes extend from a common intersection point.
2, the intersection of the axes coincides with the central axis of the annular plate R, so that the annular plate R passes between the upper roller 1 and the lower roller 2 as described above, and When the roller 2 is rotationally driven, the above-described processing is performed while the annular plate R rotates at a fixed position. As described above, since the upper roller 1 and the lower roller 2 are alternately arranged to exert a bending force on a part of the annular plate R, the vertical acting force acting on the annular plate R is the above-mentioned bending force. Only the required action force. Further, the driving force for imparting the relative movement between the upper roller 1 or the lower roller 2 and the annular plate R is only the rotation driving force of these tapered rollers. In addition, since there is a supporting means for rotatably supporting the annular plate R on the opposite side of the roller arrangement area, the annular plate R is stably supported in a state of rotating.

[0008]

According to the present invention having the above configuration, the following specific effects are obtained. Since the roller and the annular plate R are relatively moved by the rotation of the tapered roller, the drive required for the relative movement between the roller and the annular plate R is smaller than the conventional finish in which a plurality of rollers revolve while being pressed. Power can be reduced. Further, the acting force in the vertical direction acting on the annular plate R can be reduced as compared with the conventional one in which only the acting force required for the bending is applied. Therefore, the overall working force at the time of finishing can be reduced. Further, both surfaces of the annular plate R can be smoothed simultaneously. Further, since a part of the rotation region of the annular plate R in the circumferential direction is used as the region for the finishing, the entire region of the annular plate R in the circumferential direction is used as the region for the finishing. An apparatus for performing the above-described finishing method can be reduced in size as compared with a conventional apparatus.

According to the present invention, the arrangement of the upper rollers 1, 1 and the lower rollers 2, 2 is specified.
"The roller arrangement area includes a first roller unit 1a including a pair of lower rollers 2 and 2 and an upper roller 1 positioned therebetween, and a pair of upper rollers 1 and 1 and a lower roller positioned therebetween. And a second roller unit 1b composed of two support rollers arranged in close proximity to each other, and the support means has a configuration in which support rollers rotatable in rotation are arranged in the circumferential direction. "

In the case of employing the above configuration, the first and second
Since the roller units 1a and 1b are continuously arranged close to each other, the height position of each roller can be adjusted by adjusting each roller unit individually, and the height adjustment of the rollers can be easily performed. Become.

[0011]

In the embodiment shown in FIGS. 1 to 3, an upper roller 1, 1 group and a lower roller 2, 2 group are arranged in a frame 4, and a support table is provided in front of an opening on the front surface of the frame 4. A plurality of support rollers 3 are provided on the support table 31. The combination of the upper roller 1 and the lower roller 2 in the frame 4 includes a first roller unit 1a composed of a pair of lower rollers 2 and 2 and an upper roller 1 located above and between them, 1 and a second roller unit 1b composed of a lower roller 2 provided below the intermediate roller 1, and in this embodiment, a pair of lower rollers 2 and 2 of the first roller unit 1a and a lower roller 2b of the second roller unit 1b. The lower roller 2 is supported so as to be able to move up and down. For this reason, in the first roller unit 1a, a pair of lower rollers 2,
Both ends of the rotating shaft 2 are rotatably supported by upper ends of the elevating shafts 21 and 21.
Are paired with the bearings 41 formed on the frame 4. The lower ends of the elevating shafts 21 and 21 are connected to each other, and the connecting bar is supported by a base B via a crank mechanism K. Accordingly, the pair of lower rollers 2 and 2 are integrally driven up and down in response to the rotation of the crank mechanism K. Similarly, the lower roller 2 provided below the other second roller unit 1b also has a pair of elevating shafts 21 and 21.
The lower roller 2 is driven up and down by a constant stroke in accordance with the rotation of the crank mechanism K.

An upper roller 1 mounted on the first roller unit 1a and a pair of upper rollers 1, 1 disposed on the upper part of the second roller unit 1b are both bearings 41 of the upper rail 40 of the frame 4. , 41 are rotatably supported by a pair of longitudinal axes 11, 11. The screw shafts 12, which are arranged in parallel with the longitudinal axes, are screwed around the upper crosspiece 40. The screw pair is even. The screw cylinder (13) is for adjusting the height position of the upper roller 1, 1 of the first roller unit 1a or the pair of upper rollers 1, 1 of the second roller unit 1b. By operating the handle, the degree of fitting of the screw pair can be adjusted, thereby enabling the height adjustment.

In the finishing method having the above structure, the upper roller 1 of the first roller unit 1a and the lower roller 2 of the second roller unit 1b are driven to rotate by the motor M. Lower roller 2, 2
When the lower roller 2 of the second roller unit 1b is in the lowered position, the annular plate R is placed on the lower rollers 2, 2 and the support rollers 3, 3 to correspond to the first roller unit 1a and the second roller unit 1b. Each of the crank mechanisms K is operated at the top dead center position to position the lower rollers 2, 2 at the highest position.
As a result, in the first roller unit 1a, one upper roller 1 bites between the pair of lower rollers 2 and 2 by a predetermined degree, and the annular plate R is bent at this portion.
In the other second roller unit 1b, the lower roller 2 bites into the pair of upper rollers 1 and 1 by a predetermined degree, and the annular plate R is similarly bent at this portion.
The degree of bending of the annular plate R is determined by the degree of bite. In order to adjust the degree of bending in the first roller unit 1a and the second roller unit 1b, the height of the upper rollers 1 and 1 may be adjusted by operating the screw cylinder 13. As described above, when the motor R is started in a state where the annular plate R is sandwiched between the upper roller 1 and the lower roller 2 and the motors M are synchronized, the annular plate R relatively moves with the respective tapered rollers, and the annular plate R moves. R itself rotates. During this rotation, the first roller unit 1a and the second roller unit 1b perform the same operation as the roller leveler, and the flatness of the surface of the annular plate R is corrected.

At this time, ideally, the radiation origin of the tapered rollers of the first roller unit 1a and the second roller unit 1b (the intersection of the tapered roller axis or an extension of the axis).
It is necessary to make the center of the annular plate R coincide with the center of the annular plate R. For this purpose, three guide rollers 5 and 5 may be arranged at predetermined positions in the frame 4 as shown in FIG. These guide rollers are arranged so as to be in contact with the movement trajectory of the peripheral edge of the annular plate R, and the axis thereof stands upright with respect to the rotation plane of the annular plate R. Therefore, as shown in FIG. 2, when the peripheral edge is positioned so as to be in contact with the guide rollers 5, 5, the radiation origins of the upper rollers 1, 1 and the lower rollers 2, 2 and the annular plate R
And the center of rotation of. In the above embodiment, the first
The pair of lower rollers 2 and 2 of the roller unit 1a and the pair of upper rollers 1 and 1 of the second roller unit 1b are configured such that each pair of rollers can be moved up and down at the same time, but each roller can be moved up and down individually. It is also possible.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is a side view thereof.

[Explanation of symbols]

 R: annular plate 1: upper roller 2: lower roller

Claims (2)

(57) [Claims] 1. With the annular plate R supported in a horizontal position,
In the method of finishing the annular plate R, which is finished to improve the flatness of the annular plate R, a tapered lower roller 2 similar to the tapered upper roller 1 is formed along the circumferential direction of the annular plate R. The upper roller 1 and the lower roller 2 are arranged so that the rotation axis of each upper roller 1 and the rotation axis of each lower roller 2 intersect on the center axis of the annular plate R alternately. The roller array area in which the roller group consisting of the upper roller 1 and the lower roller 2 is arranged in the circumferential direction is set to a fixed range in the circumferential direction, and the substantially similar area on the opposite side is free to rotate the annular plate R. A support area provided with support means for supporting the roller, the other area between the roller array area and the support area, and a bus below the upper rollers 1, 1 and a bus above the lower rollers 2, 2 The upper roller 1 and the lower roller All or a portion of La 2 are rotationally driven by passing the annular plate R between these upper and lower rollers,
A method of finishing an annular plate, in which the degree of flexural strength at each passing point when passing through these roller groups is adjusted to a predetermined degree to improve the flatness of the annular plate R. 2. The roller arrangement region includes a first roller unit 1a including a pair of lower rollers 2 and 2 and an upper roller 1 located therebetween, and a pair of upper rollers 1 and 1 and an intermediate portion between them. 2. The second roller unit 1 b including the lower roller 2 that is positioned is arranged close to the second roller unit 1 b, and the supporting unit is configured such that rotation-supporting support rollers are arranged in a circumferential direction. 3. Finishing method of annular plate.