SU759267A1 - Method of adjusting technological tool of high-frequency welding mill - Google Patents

Description

The invention relates to the field of welding and can be used when setting up mills for high-frequency welding of pipes of medium and large diameters 5, beams and other products.

Methods are known for setting high technological tool mills in which the exhibition of the rolls in the axial direction in hori- zontally 10 and vertical planes is made according to the design dimensions using ^leveling,: string and plumb lines from the base surface, what can be processed po- (5 surface stand of frame and frame inside mandrel [ί].

The disadvantages of these methods are that the rolls are adjusted according to the drawing dimensions without taking into account the deviations, the parameters of the actual workpiece from the design, the design and manufacturing errors of the tool are not taken into account, and the external (mill) and internal (mandrel) tools are adjusted separately from different base surfaces, more complicated, and ineffective setting multi-roll calibers. . thirty

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There is a method of setting the technological tool of the mill of high-frequency welding, including the installation of the tool according to the design dimensions, with the help of strings, plumb lines, levels and patterns [2].

Using templates makes it much easier to set up multiple rolls? librov and improves the accuracy of the exhibition rolls, but the remaining shortcomings are not eliminated. As a result, when starting up new equipment and when transferring to another size of the product, it is necessary to adjust the setting of the tool during the welding process.

This stage, as a rule, leads to a great investment of time and metal.

The aim of the invention is to increase the accuracy of the settings due to the deviations of the parameters of the actual workpiece and the errors of design and manufacture of the tool.

This goal is achieved by the fact that one of the edges of the welded section is cut out to the depth, obviously. exceeding the amount of precipitation, control risks are applied on both edges to be welded, the distance of each of which is from the end of the edge exceeds the depth.

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After installation of the tool, the specified preset sizes are specified in the mill, the distances between the control risks are measured in different sections, the geometrical parameters of the edge convergence are determined from these data, and depending on the deviation from the optimal ones, an additional adjustment of the technological tool is made. ''

FIG. 1 is schematically depicted.

.77. "'.' T '^ inological tool of the mill for high-frequency welding / in Fig. 2 -

layout marking and cutting edges; see 3 - curve lines of edges constructed with the results of measurements with the required geometrical parameters. '; '·. ·· *.,'

In the modern mill of high-frequency welding of pipes with a diameter of 530 -

1620 mm the deformation of the edges of the billet 1 in the zone of their convergence and welding is carried out by the angle-setting rollers 2, the rollers of the welding stand 3 and · expanding caliber 4. Such a scheme

'the location of the tool allows you to get the required parameters of the convergence of the edges without the help of precipitation effort, i.e. contact pressure between the edges of the weld. In order to measure the geometrical parameters of the edges in the design setting of the tool, a pipe billet is set in the mill, one of the edges of which is cut to a depth a (see Fig. 2), obviously exceeding the value of the edge draft during welding. Before cutting, on the surface of the pipe billet they put risks 5, separated from the butt of edges at a distance b, greater than a, and covered in sections that are 50–100 mm apart from each other. According to the results of measurements of the distances between the cores, the curves _{r of the} line of edges b (see Fig. 3) are built, by which the geometrical parameters of their convergence are determined - the position of the point of convergence of the edges 7

 relative to the plane of the welding stand 3, the angle of convergence of the edges 'U, the total value of the convergence of the edges during welding, the degree of non-parallel edges for the plane of the expanding caliber 4.;' "

Setting the technological tool of the mill according to the proposed method is as follows.

With the help of strings, plumb lines and levelers-. Wound special stand exhibits the design dimensions of the technological tool of the mill and mandrel. The rolls of the welding stand 3 and expanding caliber 4 are set on templates, after which the mandrel is installed in

X ' ^: "mill ~ Pre-unblocked ^ a <7'7 cooking 1 with a cut-out edge GT is set into the mill so that its front \ end is at a distance of 300 \ 400 mm' beyond the plane of the expansion caliber 4. The distances between cores are measured at From the measured values of _h, 2 b is subtracted and the obtained results, divided in half, are deposited up and down from the axis. The points obtained are connected by smooth lines, and curves 6, which show the positions of the edges

(0 pipe billets deformed by the technological tool of the mill. The geometrical parameters of the edges measured by these curves are very close to the values that occur during the welding process at this tool setting. If the measured values differ from the optimal ones, the technological tool adjusts accordingly and deviates The practice shows that one or two adjustments are enough to obtain the geometrical parameters of the convergence of the edges required by the welding process.

With the proposed method, it is possible to develop a technological tool.

single and double seam pipes,. T-section beams and other products.

Using this method allows you to set up together the tool of the mill and the mandrel, taking into account the actual parameters of the workpiece and, thus, significantly reduce the time to master the new equipment and save metal, going into marriage with

35 tweaks during the welding process. In addition, a targeted exhibition of the tool in order to obtain the required parameters of the edges to be welded improves the quality of the welds.

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Claims (1)

Claim The method of setting the technological tool of high-frequency mill 45 welding of longitudinal seam pipes and other products, including the installation of tools according to design dimensions using strings, plumb lines, levels and patterns, characterized by C0 so that, in order to improve the accuracy of the setting by taking into account the deviations of the parameters of the actual workpiece and design and manufacturing errors; tool, one of the edges The welded billet is cut out to the depth of Bina, obviously exceeding the value precipitations, on both edges of the welded edges they apply control risks, the distance of each of which from the edge of the edge exceeds the depth of the notch, after 60 installation tool according to the design dimensions in the mill set the specified workpiece, measure in different sections of the distance between the control risks, from these data determine $ 5 Geometric parameters of convergence 759267 edges and depending on their deviation from the optimal produce additional tune technological tool.