JPS5947075A - Welding device of electric welded tube - Google Patents

Abstract

PURPOSE:To weld the rear end part of a tube to be welded, without executing any special work to the front and rear of the tube, by providing a means by which an electric conduction jig to be made to press-contact to the rear end part of a material to be welded and also to be made to press-contact to an electric conduction chip is moved and made to run suitably. CONSTITUTION:A work 12 transferred by pinch rolls 13, 14 is pressed by a squeeze roll 16 and is welded with pressure. On the other hand, a high frequency current is transformed by a matching transistor 30, flows to the work 12 from an electric conduction chip 18, and the work 12 is heated and welded in the center 50. When the rear end part of the work 12 approaches the roll 16, a limit switch operates, the rolls 13, 14 are kept away from the work 12, and simultaneously, an electric conduction jig 46 is lowered by operating an oil pressure cylinder 37. Subsequently, an oil pressure cylinder 45 operates, the tip of the jig 46 is made to contact with the inside circumferential face of the rear end part of the work 12, and it is made to run with the work 12. Even if the chip 18 slips out of the rear end of the work 12, it is placed on the tip of the jig 46, therefore, electric conduction to the work 12 can be executed.

Description

[Detailed description of the invention]

The present invention relates to a t4 sewn pipe bath welding device that allows the rear end of a commercial item to be bathed without causing poor bath welding. In order to manufacture pipe materials, there is a method in which a plate-shaped workpiece is first processed into a tubular cross-sectional shape by full roll forming, and then both rotating measuring parts are joined together by full high-frequency bath welding. In this method, both sides of the workpiece γ? liNshi no V; Zhou vt6
Connection 6: Do the following. Tsut,! l11. As shown in Figure 1, pinch roll l
An energized tip (hereinafter simply referred to as a tip) 3a is placed near the sides 2a and 2b of the workpiece 2 that is being fed. 3))) and the side part 2 a beyond that
A 2 b are brought into contact with each other in a V-shape. The current from the high-frequency wave source connected to the chips 3a and 3b flows through the V-shaped side portion 2a, as shown by arrows a and b in FIG.
2b, and at its turning point (the apex of the figure 7), it is rapidly heated by the proximity effect and easily reaches the bath contact temperature. Therefore, if pressure rolls (squeeze rolls) 4 are used to press this point from both sides of the work 2, the welding of the side tel (2a, 2b) is achieved. However, as shown in FIG. Therefore, as shown in Figure ζ11.3, the rear end of the workpiece 2 is
A method has been developed in which the welding auxiliary piece 5a * 5b is brought into contact with the workpiece 2 directly or by pressure, so that the welding auxiliary piece 5a * 5b can also be brought into contact with the workpiece 2. However, even if this method is used with actual guns, there are the following drawbacks. ``It is necessary to separate the target contact auxiliary piece after welding the city sewing pipe, and it is impossible to incorporate the r6 contact and the reciprocating stiffener of the welding auxiliary piece into the ``■u sewing pipe R8 contact line (+
L-rateful. Also, cut the frj joint sleeve piece u]1,
2. IJ welding of auxiliary piece and workpiece in 15 minutes
J II JT or cut a part of the workpiece into rounds. It would be better to cut them together, but not only would the materials be wasted, but the labor time required for each cut would be large.
In this case, it takes effort to correct the workpiece. Therefore, the present invention eliminates such drawbacks.
iυ'g 1a Wandering fitting (t/
The purpose is to provide r. The 41# configuration of the present invention that achieves such a 1'' location includes a feeding means for feeding the material to be welded B, which is formed into a tubular shape with both sides of the IdQ-shaped member facing each other, toward the axis of the material to be bathed. Fl'l M+2 front 614 cars II while sending out profane encounter! ll 1411 Kinshu r This is my family and I passed away with the above-mentioned two τ11 Toji.
'ichiwa L te h7 a pair of adjoining) a + tun Buddha and (r
'l'
j6 Himself bathing (concubine system T) I moxibustion 9 Rot? 1s still handles it, and Tomo I/'-1171N+, ) Departure Chisof'
The rear end of the IL jig and the energizing jig are moved into or out of the line of the contact material to the AfJ recorder. Means of transportation □ and
ItJ 'l13', the jig is made to run in the direction in which the material is fed out. i-Characterized. Below, the present invention will be explained in detail based on the actual example shown in the drawings. FIG. 4 shows a top view of the 1-Paken-tawarai-ren according to the present invention, a view taken along the line A-A in FIG. 4 is shown in FIG.
As shown in the figure. Three pairs of pinch rolls 13° 14.15 are provided on the bed 11 as feeding means for sending out 12f of the workpiece to be bathed (hereinafter referred to as the workpiece).
A pair of squeeze rolls 16 are provided to apply pressure from both sides. As the workpiece 12, in this embodiment, a plate-like member formed into a square tube shape by turning both sides of the workpiece 12 is used. By contacting the vicinity of 181s17 and energizing it, the portion of both 01+1 tjll 17 that is pressed and squeezed by the squeeze roll 16 is 'erw stitched' [
A pair of current-carrying chips 18 that are in contact with the two baths are connected to each other. Communication α
Since the chips 18i17j' and the workpiece 12 must be moved depending on their sizes, etc., the following structure is adopted. A support member 20 is provided across the workpiece 12 and two roughly square frame frames 19, and is vertically moved in the longitudinal direction of the workpiece 12 through the dovetail groove 21 of the supporting IJ11 material 20.
One unit 22 is fitted. And this hoj4 moving platform 22
Hydraulic cylinder 2 for moving along the dovetail groove 21
3 is fixed to the support member 20. The vertical movement table 22 is also provided with a dovetail groove 24, and the horizontal movement table 2 is provided in the dovetail i\1!24 so as to be movable in a direction perpendicular to the longitudinal direction of the workpiece 12.
5 is fitted. Then, this horizontal moving table 25 is moved to the dovetail groove 2.
A hydraulic cylinder 26 for moving along the vertical axis P is fixed to the moving table 22. The lateral movement table 25 is provided with a vertical movement table 28 having a dovetail groove 27 so as to be movable in the vertical direction, and a hydraulic cylinder 29 for moving the vertical movement table 28 is fixed to the VT movement table 25. Vertical moving table 2
8, the matching transformer 30 is installed at Ilt! A power supply cable 31 that supplies high frequency current to the matching transformer 30 is grounded. Below the matching transformer 30 is a contact support device 32.
A pair of current-carrying chips 18 are attached throughout the entire body, and the current-carrying chips 18 are mounted on both sides of the soak 12, respectively! <Pull the part near I517. The above is the basic 4-J structure of the conventional electric resistance welding pipe bath welding device, but the present invention includes the following means. ” 5 anti-alignment lances 301il for the vertical moving table 28
il'jl 'I'iJ, ? '1' Shellfish are being picked. The mutually flat supports &:OS3, :(3' are supported by the vertical movable table 28 respectively, and the core supports &33, 33' are connected and reinforced by connecting members 34, 35, 36. A connecting member 35 FC is a hydraulic cylinder 3 as a moving means.
The suspension member 38 can be opened via the L support 9. Inside or outside the line in which the workpiece 12 moves by operating the hydraulic cylinder 37;
It can be moved downwards. Ushita. Even if a force is applied to the suspension member 311, it remains horizontal for 111h at 84
(Mountain LE cylinder 37 m to my father)
L-shaped kite pillars 39 and 4 U are provided, and the kite pillars 39 and 40 are fixed to the connecting member 36 and 34 with a fixed tail of 7'Lf'C, and are inserted into the 11 and 11 holders 41 and 42 in a self-direction manner. A dovetail 43 is formed at the lower part of the suspension part 38 (see Figure 7), and the workpiece 12 slides in the direction of sending out the workpiece 12. A free sliding member 44 is connected to a pressure cylinder 450 and a cylinder 45' fixed to the hanging member 38 and serving as a traveling means. The energizing jig 46 connects the IEP to the IEP.

[The W jig 46 is a buffer type with an insulation fL of a rubber band on one side of the holding member 47, as shown in the enlarged view of the entire figure in Figure 6.
A pair of] 11 market pieces 4 through 48 pieces of material! l, 49'
k Leisure time = attached. , said A If, piece 49
, 49' energizing tip J8 to workpiece 2-10 is enough V
This is because the month ttt of state alloys etc. is in the middle, and it is like l, The balance of attachment is improved. In this embodiment, a hydraulic cylinder is used as the moving means and the traveling means I7, but instead of using a servo motor and a rack-pinion, a servo motor and a rack-pinion are used. '(i-It may be possible to make it so that it moves straight and still. The construction of the Iθ welding device for sewing 71 will now be explained. Workpieces transferred by pinch rolls 13 and 14) 2 is a squeeze The rollers 16 apply pressure from both sides 17 to each other at a pressure of about η.On the other hand, 1L is supplied from the supply cable 31.
It is transmuted by the transformer 30 with 6 high-frequency waves; 12 VC flows from the chip 18, and the squeeze roll 16 is connected to the middle of the 11] minutes (
Fold it at the SQR center (50) and attach it. This SQR
At the center 5(), the workpiece 12 is moved to the sword 11hf(: J, 枦Sa nru.) When each end hjS of the workpiece 12 comes close to the squeeze roll 16 as shown in Figure 2, detects the workpiece 12's valley, and the pinotirols 13 and 14, which were holding and feeding the workpiece 12, move away from the workpiece 12, and at the same time the VChIJ pressure cylinder 37 After making υ1, the jig 46 is slightly lower than the top surface of the workpiece 12.
r −* T,”IL) DoF' −j−2+.?X
VCm'+Lf, ? ? y JL 467'l"Location Iγ Setting -C1t・To lower L7A, also known as the plate (illustrated)
r, :isu1shi. ii.
,49 ahead 11',! A touch sensor (not shown) detects that the j section is attached to the inner circumferential surface of the front end of the workpiece 12, and then the 1st center jig 46 is placed on the inner peripheral surface of the 1st side edge of the workpiece 12. At the same time, the work 12 moves at the same speed as the VC work 12.
I want it to run with me. Work 1 with the same wide width
2 is i', taken out, trace'rt°C step 18 is work 1
2 no A〉9crystal 1tls to evening 1tt 7'c-shaped V3
VtCb Imo>'Iff, tip 18 brim 1fj
l'a piece/l 9, 49'u 2nd 11 shaku, circle, this i, Ii blank work 12 hind; part is SQR center 5
0 (<) (to 11jtj (; through to 5)
49' can be transferred from the hot chip 18 to the workpiece 12]). In other words. As shown in Figure 3, the bale of the workpiece is connected to the bath.
You can get the same effect as when you touch fi auxiliary piece k16 1
Nork 12's Postscript A II (Taking bath to Bao Chongquan-
Soon. Work 12 Itomo M is SQL center 5 ()
When it reaches '', the TW jig 46 drops a few drops and touches the workpiece 1.
2 or b'7)re, i'+rorrg cylinder 37 and 4
5 is activated, and the lodging device 466 returns to its original position, completing one cycle. Let's explain h1 when the workpiece 12' is smaller than the workpiece 12 (Fig. 5).
Fully lower. Then, the energizing jig 46 is also attached to the vertically movable table 28, and the energizing jig/tool 46 is also lowered by the same amount as the descending machine of the Oshikutun 18, so the relative position of the energizing jig 46 and the energizing jig 46 is Relationships change 5 energizing jig 46
There is no need to adjust the position of W·ν again. In addition, the workpiece 12 has both side parts 17 due to the bending at the time of molding, etc.
Since misalignment occurs in the gap between the two (seam gap), it is necessary to adjust the resistance value of the n-contact conductive path to be the same on both sides 17 so that the bath welding quality does not deteriorate. Therefore? lI] I-f Niji Linda 26 & Teyo! J Move the horizontal moving table 25 to match the seam gap! Susasetangeyo, but at this time, did it pass to the horizontal moving table 25? Since the q jig 46 is also fixed, the energizing jig 46 also moves at the same time, so that J + u and the jig 46 can be moved at the same time. 1 o suitable place comes to 1 [years old]. The same thing can be said when moving the +111 cff chip 18 in the direction of movement of the workpiece 12. 50 and the current-carrying tip 18 may be longer than 4i1kK. This "station building" can be moved by operating the hydraulic cylinder 23 to move the vertical moving table 22 in the direction of movement of the workpiece 12, but since the single energizing jig 46 is also attached to the vertical Bv1 table 22, AL The tip 18 moves by the same amount of sliding, and one tip is also used for welding the rear end of the workpiece 12.
The electric jig 46 is broken. Above, W), along with the fMI21 drawing (1, as stated above, unexploded ciJvc, r: n, li4 on the overlaid Jshi material)
The effect of 4't'r, which is the same as that of 'It r, k'a #J' when all the contact pieces f6 are in contact, can be obtained by f4, so the following effect is obtained. Bath service? 1! The labor and working time of bathing the i-splitting piece are unpleasant, and the welding 'fi [i
It is cost-effective because no material is needed for the auxiliary pieces. Welding resistance: JN500 - When used, spatter often occurs on the roll, but there is no such inconvenience. Due to the contact of the indirect auxiliary piece to the fr, it was necessary to stop at the work line, but with the present invention, it can be done continuously without stopping. Furthermore, since the energizing jig always moves by the same dimension in the same direction in which the energizing chip moves, there is no need to adjust only one energizing jig.

[Brief explanation of drawings]

FIGS. 1 to 3 are explanatory diagrams showing the conventional electric resistance welding welding device, FIGS. 4 to 8 are explanatory diagrams showing the welding resistance device for a welded pipe according to the present invention, and FIG. 4 is a front view 1. ．． Figure 5 is a view from the 0A-A arrow in Figure 4;
The figure is an enlarged view of part 8 in Fig. 4. Fig. 7 is an enlarged view of part C in Fig. 5, and Fig. 8 is an overall perspective view. 12 and 12' in the drawing are workpieces. 13.14.15 is pinch roll, 1 7 rl il EGIi. 18 is dn Shacho Nag. 37 and -15 are hydraulic cylinders. 46 is】Ex-g (Jig. Representative Patent Attorney Former Ishishishibu (and 1 other person) t: ~
I 1ffl

Claims (1)

[Claims] A feeding means for sending out the bathed material formed into a tubular shape in the axial direction of the bathed material with all ten parts of the plate-like member facing each other, and a feeding means for feeding the bathed material in the axial direction of the bathed material; and a pair of current-carrying tips that are brought into contact with and energized to contact the both sides of the electrical resistance welded pipe with the bathing material. 11 After the voltage is brought into contact with the energizing chip and energized,
7! j t'; A way to extend Is? A J jig, a moving means for moving the energizing jig into or out of the line of the broken ff3 contact material, and a traveling means for moving the 01f passing jig in the sending direction of the bathed contact material. An electric resistance welding pipe welding device that is designed to be constructed.