JPH0543938Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an electric resistance welded tube forming device that reduces the stand arrangement pitch and shortens the overall length.

[Prior Art] An ERW tube forming device is a device that gradually bends and shapes a plate into a cylindrical shape when manufacturing an ERW tube.

An example of a conventional electric resistance welding tube forming apparatus will be explained with reference to FIG.
A main roll stand 4a, 4b, 4c, 4d having a pair of upper and lower horizontal rolls 3a, 3b, 3c, 3d rotatably supported by a, 2b, 2c, 2d.
A pair of left and right vertical rolls 6a, 6b, 6c, rotatably supported by axle boxes 5a, 5b, 5c, 5d,
It is an idle roll stand equipped with 6d. The idle roll stand 4a is located upstream of the main roll stand 1a with respect to the material traveling direction D, and the idle roll stands 4b, 4c, and 4d are located between the main roll stands 1a and 1b, between 1b and 1c, and between the main roll stands 1a and 1c.
They are respectively arranged between c and 1d.

In the electric resistance welding tube forming apparatus described above, the plate sent in the material progress direction D passes through each roll stand and is gradually formed into a cylindrical cross-sectional shape.

[Problems to be Solved by the Invention] However, in the above-mentioned electric resistance welded tube forming apparatus, the main roll stands 1a to 1d and the idle roll stands 4a to 4d all have base plates 7a, 7b, and 7c on a common bed frame 9. ,7d,
8a, 8b, 8c, and 8d, and there is a gap between the adjacent main roll stand and idle roll stand, which increases the stand arrangement pitch and increases the overall length L of the device. It was hot.

The present invention was developed in view of the above-mentioned circumstances, with the aim of shortening the overall length of the device by narrowing the stand arrangement pitch.

[Means for Solving the Problems] The present invention provides an electric resistance welded pipe forming apparatus in which a plurality of sets of a main roll stand equipped with horizontal rolls and a plurality of idle roll stands or cluster roll stands each equipped with vertical rolls are arranged alternately. , the housing of the adjacent main roll stand and the housing of the idle roll stand or cluster roll stand are integrally connected.

[Function] As the plate passes through each roll stand, its cross-sectional shape is gradually bent and formed into a cylindrical shape, but since the stand arrangement pitch can be reduced, the overall length of the device is shortened.

[Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIGS. 1 to 8 show an embodiment of the present invention, and the same reference numerals as those shown in FIG. 9 represent the same parts.

In this embodiment as well, the idle roll stand 4a is located upstream of the main roll stand 1a, and the idle roll stands 4b, 4c, and 4d are located between the main roll stands 1a and 1b, between 1b and 1c, and between 1c and 1c.
d, respectively.

The details of the main roll stand 1a and idle roll stand 4a, which are disposed on the most upstream side with respect to the material progress direction D, will be explained with reference to FIGS. 2 to 4.
A base plate 10a is provided on both left and right sides of the top, and the base plate 10a has bolt holes 11.
It is fastened to the bed frame 9 by a bolt inserted through the hole a.

On the base plate 10a, there is a horizontal roll 3a.
A window portion 12 on which the axle box 2a fitted with the axle box 2a can get on and off.
A housing 13a including a housing 13a is integrally fixed, and a frame 14a having a built-in lowering device is removably attached to the upper part of the housing 13a.

A housing 15a having a height lower than the height of the material passing surface H and extending in a direction orthogonal to the material traveling direction D is erected and fixed at the upstream end of the base plate 10a with respect to the material traveling direction D. ,
Furthermore, housings 16a and 15b are erected on the upstream and downstream sides of the housing 13a in the material traveling direction D, parallel to and of the same height as the housing 15a,
The housings 16a and 15b are similar to the housing 13
It is fixed to the side a and the base plate 10a. Therefore, between the housings 15a and 16a,
A rolling down device 17a is provided which can adjust the vertical roll 6a via the axle box 5a in the height direction and in a direction perpendicular to the material traveling direction D.

Details of the main roll stands 1b, 1c and idle roll stands 4b, 4c, which are arranged at intermediate positions with respect to the material progress direction D, are shown in FIGS. 5 and 6.
To explain with a diagram, base plates 10b and 10c are disposed on both left and right sides of the bed frame 9 with the molding line L in between.
0b and 10c are fastened to the bed frame 9 with bolts inserted through bolt holes 11b and 11c.

On the base plates 10b, 10c, housings 13b, 13c equipped with window parts 12b, 12c through which axle boxes 2b, 2c fitted with horizontal rolls 3b, 3c can be moved up and down are fixed integrally, and the upper part of the housings 13b, 13c is fixed. Frames 14b and 1c each having a built-in rolling device are removably fixed thereto.

On the upstream and downstream sides of the housings 13b, 13c in the material progress direction D, there are housings 16b, 15c, 16c, 15 that are parallel to and have the same height as the housings 15a, 16a, 15b shown in FIGS. 2 and 3.
d is installed upright, and the housings 16b, 15c, 1
6c and 15d are fixed to the sides of the housings 13b and 13c and to the base plates 10b and 10c. Therefore, the housings 15b, 16b, 15
Between c and 16c, the vertical rolls 6b and 6c are placed in the axle box 5.
A lowering device 17 that can be adjusted in the height direction and in a direction perpendicular to the material progress direction D via b and 5c.
b, 17c are arranged.

The details of the final stage main roll stand 1d and idle roll stand 4d will be explained with reference to FIGS. 7 and 8. Base plates 10d are disposed on both left and right sides of the bed frame 9 with the forming line L in between. Base plate 10d has bolt hole 1
It is fastened to the bed frame 9 by a bolt inserted through 1d.

On the base plate 10d is a horizontal roll 3d.
A window portion 12 in which the axle box 2d fitted with the axle box 2d can be moved up and down.
A housing 13d including a housing 13d is integrally fixed, and a frame 14d having a built-in lowering device is detachably fixed to the upper part of the housing 13d.

On the upstream side of the housing 13d in the material traveling direction D, a housing 16d is erected in parallel with and at the same height as the housings 15a, 16a, etc., and the housing 16d is fixed to the side of the housing 13d and the base plate 10d. A lowering device 17d is disposed between the housings 15d and 16d, which can adjust the vertical roll 6d in the height direction and in a direction perpendicular to the material traveling direction D via the axle box 5d.

In the above apparatus, the plate sent in the material progress direction D passes through each roll stand, and its cross-sectional shape is gradually bent and formed into a cylindrical shape.

As mentioned above, the base plate of the main roll stand and idle roll stand is common, and the housing of the idle roll stand is integrally fixed to the adjacent main roll stand, so the stand arrangement pitch can be reduced, and the equipment can be The total length L' can be shorter than the conventional total length L.

In addition, in the embodiment of the present invention, the case where four sets of main roll stands and four idle roll stands are installed has been explained, but it is noted that any number of sets of main roll stands and idle roll stands may be installed, and that the stand on the most upstream side of the molding line is installed as the idle stand. Although we have explained the case where it is used as a roll stand, it can also be implemented as a main roll stand, a cluster roll stand can be installed instead of an idle roll stand, and other various changes can be made without departing from the gist of the invention. Of course, there are other things that can be added.

[Effects of the invention] According to the electric resistance welding tube forming device of the present invention, the stand arrangement pitch can be shortened, so the overall length of the device can be shortened.
Therefore, the excellent effect of reducing equipment costs can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an overall explanatory diagram of an embodiment of the electric resistance welded tube forming device of the present invention, Fig. 2 is an explanatory diagram of the upstream stand of the device in Fig. 1, and Fig. 3 is a view taken from the − direction arrow in Fig. 2. Figure 4 is a view taken in the negative direction of Figure 2, Figure 5 is an explanatory diagram of the intermediate stand of the device shown in Figure 1, Figure 6 is a view taken in the negative direction of Figure 5, and Figure 7 is a view taken in the negative direction of Figure 5. FIG. 8 is an explanatory view of the downstream stand of the apparatus shown in FIG. 1, FIG. 8 is a view taken in the - direction arrow of FIG. 7, and FIG. 9 is an explanatory view of the conventional electric resistance welded tube forming apparatus. In the figure, 1a, 1b, 1c, 1d are main roll stands, 4a, 4b, 4c, 4d are idle roll stands, 10a, 10b, 10c, 10d are base plates, 13a, 13b, 13c, 13
d, 15a, 15b, 15c, 15d, 16a,
16b, 16c, and 16d indicate housings.

Claims (1)

[Scope of utility model registration request] In an electric resistance welding tube forming apparatus in which a plurality of sets of main roll stands with horizontal rolls and idle roll stands or cluster roll stands with vertical rolls are arranged alternately, the housings of the adjacent main roll stands and the idle roll stands or clusters are An electric resistance welded tube forming device characterized by integrally connecting the housing of a roll stand.