JPH0241396B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding section guiding and supporting device for guiding and supporting the web material and flange material of a welded section steel in a welded section when manufacturing a welded section steel such as a welded H section steel. .

Welded shaped steel is made by welding multiple members to a predetermined H.
Shapes and T-shapes are manufactured, but if the center of the member is not guided and supported correctly, the relative positional relationship of the flange material and web material cannot be maintained correctly, which has a serious drawback of causing so-called center deviation. . As shown in FIG. 1, conventionally, the web material W is supported by the web support roll 2 at the welding point between the upper and lower pressure welding rolls 1, 1, so there is little positional variation, but due to space constraints, the flange material F
Generally, the end face of the flange is guided by a guide roll 3 in front of the welding point.

However, especially for narrow-width, thin-walled flanges, it is difficult to correctly guide the flange material to the welding center because the rigidity of the steel material is low.
This becomes more difficult as the distance between the guide roll and the welding point increases, the narrower the width, and the thinner the material. Furthermore, it has the disadvantage that adjustment must be made each time depending on the width of the flange material.

This invention was proposed in view of the above circumstances, and its purpose is to provide a welded part that can accurately and stably guide and support the web material and flange material at the welded part and prevent center deviation. An object of the present invention is to provide a guide support device.

The welding part guiding and supporting device according to the present invention includes a guide roll having a web support part that comes into contact with the side surface of the web material and a flange support part that can guide the flange end face between the upper and lower press rolls that press the flange material of the weld part. , the web and flange support points are arranged in the same plane as the pressure contact points of the upper and lower pressure rolls, and the width of the upper and lower pressure rolls is made smaller than the width of the flange material, so that the web material and the flange By simultaneously guiding and supporting the web material and the flange material within the same cross section at the welding part, the web material and the flange material can be positioned at the welding center, and center deviation can be minimized.

The present invention will be described below based on an illustrated embodiment. As shown in FIG. 2, a guide roll 4 is disposed between the upper and lower pressure rolls 1, 1, and the rotation center axis of the guide roll 4 and the rotation center axis of the upper and lower pressure rolls are located in the same plane. It has a web support part 5 that comes into contact with the side surface of the web material W and a flange support part 6 that can guide the end surface of the flange material F.

As shown in FIG. 3, the web support portion 5 includes a pair of web support rolls 7 vertically spaced apart from each other.
The flange support section 6 is composed of a pair of upper and lower flange guide rolls 8, and the center portion of the flange guide rolls 8 is supported by a support bracket 10 via a bearing 9. Further, the web support roll 7 is fitted onto a flange guide roll 8, and this roll 8 is tightened in the vertical direction with bolts and nuts 11, whereby the roll 7 and the roll 8 are integrated.

Furthermore, the diameter of the guide portion of the flange guide roll 8 is as follows:
The diameter is smaller than the diameter of the web support roll 7 by (flange width - web thickness + set interval). Here, the set gap varies depending on the required dimensional accuracy, but by setting it to 0.2 to 0.5 mm, it is possible to reliably support the web material at the welding point and at the same time reduce the variation in center deviation. Further, the width of the pressure roll 1 is made smaller than the flange width to avoid contact with the roll 8.

Next, FIG. 4 shows the web support roll 7.
The web support roll 7 is attached to the shaft-cum-flange support roll 8 via a bearing 12. In this way, the difference in circumferential speed on the contact surface or guide surface due to the difference in roll diameter can be eliminated.

As shown in FIG. 5, in the conventional method, the degree of center deviation and the variation in center deviation were extremely large, but as shown in FIG. 6, according to the present invention, the center deviation becomes extremely small.

In the embodiment, a normal H-shaped steel was described, but the present invention can also be applied to special H-shaped steel whose flange width and thickness differ at the center of the flange and web, or the upper and lower parts, and welded shaped steel such as T-shaped steel.

As mentioned earlier, according to the present invention, the deviation in the center is extremely small and the quality can be improved. Just by incorporating the role, there is no need for any subsequent adjustments, reducing the frequency of adjustments. Furthermore, by changing the flange guide roll, various sizes can be easily accommodated.

[Brief explanation of the drawing]

Figures 1A, B, and C are a plan view, front view, and cross-sectional view showing a conventional welding part guide and support device; Figures 2A,
B and C are a plan view, a front view, and a cross-sectional view showing a welding part guide and support device according to the present invention, FIG. 3 is a cross-sectional view showing details of a similar device, and FIG. 4 is a second embodiment. A cross-sectional view, FIG. 5 is a graph showing a conventional center deviation state, and FIG. 6 is a graph showing a center deviation state according to the present invention. 1... Upper and lower pressure contact rolls, 2... Web support rolls, 3... Guide rolls, 4... Guide rolls, 5
...Web support part, 6...Flange support part, 7...
... Web support roll, 8 ... Flange guide roll, 9 ... Bearing, 10 ... Support bracket, 11
...Bolts/Nuts, 12...Bearings.

Claims (1)

[Claims] 1. In a device that guides and supports a steel strip at a welded joint in the welded shape steel production process in which steel strips are continuously assembled and formed by electric resistance welding, the side surface of the web material is A guide roll having a web support part that comes into contact with the web support part and a flange support part that can guide the flange end face is arranged so that its rotation center axis and the rotation center axis of the upper and lower pressure rolls are located in the same plane, A welded section guide and support device for welded section steel, characterized in that the roll width of the upper and lower press rolls is smaller than the width of the flange material.