JPS603984A - Seam guiding device of device for producing electric welded pipe - Google Patents

Abstract

PURPOSE:To provide a titled device which guides exactly an unwelded pipe body without damaging said body by constituting a support roll including a seam guide fin and other plural support rolls in such a way that the rolls expand or contract relatively with the pipe axis and can turn around the pipe axis. CONSTITUTION:A seam guiding device of a device for producing electric welded pipe supports and guides an unwelded pipe body 11 with a support roll 32 having a seam guide fin 31 and other support rolls 33, 33'. Roll holders 34 fitted pivotally with said rolls 32, 33, 33' of such guiding device are slidably attached via sliders to a head 35 and said head 35 is vertically and laterally moved and adjusted by adjusting devices 45, 48 and is further constituted turnably by means of a head turning device 41 via a rack 37 and a pinion 38. The above- mentioned support rolls 32, 33, 33' are provided expandably and contractably relatively with the pipe axis by a fine adjusting device 36. The V-convergent point of the unwelded pipe 11 is guided at an adequate advance angle without damaging the edge part by the seam guiding device constituted in the above- mentioned way.

Description

[Detailed Description of the Invention] When welding an unwelded tube body formed by a welding ring using a high-frequency induced current or the like, a seam that guides the V convergence point of the edge portion to the center of the welding roll is related to the welding device. It is something.

In the electric resistance welded pipe manufacturing equipment, the steel strip is formed by forming, and the thickness of the steel strip becomes uneven during the process of forming the steel strip to the welding roll.

Side bending, uneven tightening of forming rolls, and other factors can cause a twisting phenomenon in the material called sealing. As a result, the V convergence point of the edge part deviates from the proper approach position and deviates from the center of the welding roll, causing defects in the butt shape, changes in the amount of offset, etc., and making it impossible to obtain a healthy quality of the welded part such as poor welding strength. There were often none.

In order to solve this problem, conventionally, as shown in FIG.
The seam guide fin 12 is inserted and guided within the V convergence angle a of 1, and the seam guide 12 is guided. A method has been proposed in which the V convergence point 14 of the edge portion is guided to the center of the welding roll 15.15 by one roll 13. However, Figure 2 (a)
From (b), the seam guide fins 12 and the support rolls 13 are connected to the shaft 1 installed perpendicularly to the tube axis.
2a.

Because it is pivoted to 13a, soumga 1 dofin 12
The support roll 13 can only be moved vertically and perpendicularly to the tube axis, and as a result, the torsion of the material can be adjusted.
This was mainly done by moving the seam guide fin in a direction perpendicular to the tube axis. Reference numerals 16 and 17 are a horizontal adjustment device and a vertical adjustment device of the seam guide device.

However, in this method, since the gauge fins 12 can only be moved in the vertical direction and in the direction perpendicular to the tube axis, if the seam part is twisted, one edge part 18f! : It was necessary to correct the problem by pressing the seam guide fin 12 in a direction perpendicular to the pipe i11+.

As a result, the edge part was strongly pressed in the right angle direction, causing pain in the edge part17, and because only one edge part was pushed strongly, the seam part opened and an appropriate entry angle could not be obtained, and the shape of the edge part There were problems such as the left and right not being symmetrical.

The present invention solves the above-mentioned drawbacks and provides a seam guide device for guiding the convergence point of the edge portion at an appropriate approach angle to the center of the roll without damaging the edge portion.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Third
4, the unwelded tube body 11 includes a support roll 32 including a seam guide fin 31 and a plurality of other support rolls 33 and 33' (two are shown in this embodiment).
It is well maintained. Each of the Trolls 32
, 33, 33' are pivotally attached to the roll holder 34,
Each roll holder is provided on the head 35 via a slider (not shown) and is adjustable in the direction perpendicular to the tube axis by a fine adjustment device 36 (only one is shown in this embodiment).

The head 35 is fixed to a head holding plate 40 by a head holder 39 so as to be rotatable about the tube axis by a rack 37 and a pinion 38 fixed around the head. Reference numeral 41 denotes a rotary rotating device for rotating the head 35. The head holding plate 40 has a slide groove 43 provided in the main column 42 of the device.
f: Fixed to the sliding plate 44 so as to be able to slide through it. 45 is an adjustment device for sliding the head holding plate 40 in the vertical direction. Further, the sliding plate 44 is slidably attached to the substrate 47 via a sliding groove 46. 48 is sliding plate 44□ka right, 5I□, Tsukaui, Eyu. , 8th and 4th aa. The board 47 is fixed to the bed (not shown) of the main body of the electric resistance welded tube manufacturing apparatus with bolts.

Since the seam guide device according to the present invention has the above-described configuration, it can be adjusted in the left-right direction, up-down direction, vertical direction, and rotational direction with respect to the tube axis.

Next, the operation of the seam guide device according to the above invention will be explained. The adjustment device 48 moves and adjusts the sliding plate 44 left and right, and the adjustment device 45 moves the holding plate 40 to the left and right.
slide in the vertical direction to pre-swage and center the seam guide device. Next, the fine adjustment device 36 expands and contracts the support rolls 32, 33, 33' to press the unwelded tube body 11 in a direction perpendicular to the tube axis to accurately center it. At this time, the unwelded tube body 11 is held in a predetermined shape by the support rolls 32 including the seam guide fins 31, but when a twisting phenomenon called rolling occurs in the raw steel strip, the convergence point of the edge part It will deviate from the proper entry position and deviate from the center of the welding roll, resulting in defective products such as poor butt shape. Therefore, in order to correct the twist, the unwelded tube body 11 is transferred to the support roll 32 including the seam guide fins 31 while maintaining the predetermined shape, and then transferred to the head 3 by the rotation device 41.
5 and rotates around the tube axis in the opposite direction to the twisting direction. In this case support roles 32, 33, 33
In the unwelded pipe body 11 surrounded by It is possible to guide the V convergence point to the center of the welding roll while maintaining the predetermined shape without causing damage or the like.

In addition, for expanding and contracting the support roll when changing rolls due to size changes and roll polishing, if a scroll chuck, for example, is used as the head, expansion and contraction can always be performed around the tube axis, making it easy to adjust the centering. But what about the wear and tear on the support rolls? - Slight changes in the roll diameter can be adjusted using the vertical fine adjustment device attached to the roll holder.

As described above, if the seam guide device according to the present invention is used, when guiding the V-convergent part of the unwelded pipe body to the center of the welding roll, it is possible to avoid problems such as poor opening of the seam with respect to the pipe axis and pressing only one edge. It is possible to prevent edge damage or deformation of the tube before it enters the welding roll, and is extremely effective in reducing machine stoppages for these adjustments, improving workability, and improving quality.

[Brief explanation of the drawing]

Fig. 1 is a general layout diagram of the welding roll vicinity of an electric resistance welded pipe manufacturing device, Fig. 2 is an explanatory diagram of an example of a conventionally used seal and guide device, and (a) is a perspective view thereof. , (b) is a diagram showing the relationship between the tube body, seam guide fins, and support rolls as viewed from the arrow A-A in Figure 1, and (c) is a drawing showing the relationship between the tube body, seam guide fins, and support rolls as viewed from the arrow A-A in Figure 1. (c) is a diagram showing the relationship between the tube body, seam guide fins, and support rolls, and (c) is a diagram showing the relationship between the tube body and the seam guide fins. 3 is a perspective view of the seam guide device according to the present invention, FIG. 4 is a front view thereof, and FIG.
The figure is a side view thereof. 10... Forming final roll, 11... Unwelded pipe body, 12... Seam guide fin, 12a... Seam guide fin shaft, 13... Su, N-) roll, 14...
・■Convergence point, 13a...Support roll axis, 15...
・Welding roll, 16... Lateral direction adjustment device, 17...
- Vertical direction adjustment device, 18... edge portion, 31...
Seam guide fin, 32, 33, 33'...Support roll, 34...Roll holder, 35...Head, 36...Fine adjustment device, 37...Rack, 38...
...Pinion, 39...Head holder, 40...Head holding plate, 41...Head rotating device, 42...Main pillar, 4
3 - Slide groove, 44... Sliding plate, 45... Adjustment device, 46 - Slide groove, 47... Board, 48...
Adjustment device. Patent Applicant: Nippon Pipe Mfg. Co., Ltd., Patent Attorney: Tomo Suzuki

Claims (1)

[Claims] An electric resistance welded pipe manufacturing device has a support roll including a seam guide fin and a plurality of other support rolls. - A seam guide device characterized by the fact that the troll can expand and contract with respect to the tube axis and can rotate around the tube axis.