CN210451355U - Extrusion roller device for high-frequency welding of longitudinal welded pipe - Google Patents
Extrusion roller device for high-frequency welding of longitudinal welded pipe Download PDFInfo
- Publication number
- CN210451355U CN210451355U CN201921119172.5U CN201921119172U CN210451355U CN 210451355 U CN210451355 U CN 210451355U CN 201921119172 U CN201921119172 U CN 201921119172U CN 210451355 U CN210451355 U CN 210451355U
- Authority
- CN
- China
- Prior art keywords
- squeeze roll
- inverted
- adjusting mechanism
- extrusion roller
- shaped seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
A squeeze roll device for high-frequency welding of straight welded pipes comprises a left squeeze roll (1), a right squeeze roll (2) and an upper squeeze roll (3) which jointly form a perfect circle, wherein an inverted U-shaped seat (5) is positioned and abutted with the side wall of a U-shaped base (4); the left extrusion roller (1) and the right extrusion roller (2) respectively adjust the positions of vertical rotating shafts of the left extrusion roller and the right extrusion roller through a first adjusting mechanism (10); the upper extrusion roller (3) is aligned to the rotating shaft X through a second adjusting mechanism (20)1‑X1The whole body can be adjusted up and down; the upper extrusion roller (3) is aligned to the rotating shaft X through a third adjusting mechanism (30)1‑X1Adjusting levelness of the steel tube. The straightThe extrusion roll device for high-frequency welding of seam welded pipes accurately and simply realizes the extrusion roll device with three rolls enclosing into a perfect circle.
Description
Technical Field
The invention relates to the technical field of welded pipes, in particular to a squeeze roller device for high-frequency welding of a straight welded pipe.
Background
The production of straight welded pipe is a plastic working method in which a strip steel is passed through a plurality of forming rolls having a specific contour in sequence, and is gradually bent and deformed to finally obtain the cross-sectional shape of a circular pipe having a specific diameter.
The welding extrusion rollers are usually extruded by five rollers, the roller surfaces of two vertical side extrusion rollers with vertical shafts, a lower extrusion roller with a horizontal shaft and two upper extrusion rollers with inclined shafts are encircled together to form a perfect circle, and the roller surfaces of the upper extrusion rollers with the two inclined shafts are respectively extruded at two butt joint edge parts of the tube blank to form pressure fusion welding of the butt joint edges. The other rollers are simplified into four rollers, the lower extrusion roller is omitted, and the lower arc of the vertical side extrusion roller of the vertical shaft is extended.
The four-roll extrusion or the five-roll extrusion of the prior art is liable to cause the following problems because the axes of the two upper extrusion rolls are inclined. 1) The outer side edge of the upper squeeze roll opposite to the welding line is easy to cause linear indentation to the tube blank, and the actual production process cannot form an ideal perfect circle because the parameter setting of the roll is not necessarily just adjusted to the design size, so that the welding line side and the outer side of the upper squeeze roll are contacted with the tube blank, the extrusion force applied to the tube blank at the welding line side is large, and the extrusion force applied to the tube blank at the outer side is small. But the small extrusion force causes the outer edge to generate linear indentation on the tube blank; 2) if the upper squeeze roll is displaced from the center of the unit, the molten metal is easily squeezed by the upper squeeze roll, causing a dent. The existing five-roller extrusion brings much trouble to the adjustment of actual production, the field adjustment is not easy to consider due to the fact that the production line and the like form pipes, the calabash is often pressed, the adjustment can only be tried and seen according to experience, and the defects are difficult to completely control.
The extrusion roller device is easy to adjust and control the quality of a welding seam, and is an urgent technical problem for increasing the efficiency of a production enterprise.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide a squeeze roll device for high-frequency welding of a straight welded pipe, which is easy to adjust and easy to control the quality of a weld.
The invention aims to realize the purpose, and the squeeze roll device for high-frequency welding of the longitudinal welded pipe comprises a left squeeze roll, a right squeeze roll and an upper squeeze roll which jointly enclose into a perfect circle, wherein the left squeeze roll and the right squeeze roll are slidably arranged on a U-shaped base, and the upper squeeze roll is integrally arranged on an inverted U-shaped base in an up-and-down adjustable manner; the inverted U-shaped seat is positioned and involuted with the side wall of the U-shaped base;
two side walls of the U-shaped base are respectively provided with a first adjusting mechanism, and the first adjusting mechanisms are respectively connected with the left extrusion roller and the right extrusion roller; the left extrusion roll is provided with a vertical rotating shaft Y with adjustable position1-Y1The right squeeze roll has a vertical rotating shaft Y with adjustable position2-Y2The left extrusion roller and the right extrusion roller respectively adjust the positions of vertical rotating shafts of the left extrusion roller and the right extrusion roller through first adjusting mechanisms;
the upper extrusion roller is connected with the rotating shaft X through the second adjusting mechanism1-X1The whole body can be adjusted up and down;
the top wall of the inverted U-shaped seat is provided with three adjusting mechanisms, and the upper extrusion roller is provided with a rotating shaft X1-X1The upper extrusion roller is aligned to the rotating shaft X through a third adjusting mechanism1-X1Adjusting levelness of the steel tube.
Further, when the inverted U-shaped seat is aligned with the side wall of the U-shaped base, the parallelism of the top beam of the inverted U-shaped seat and the bottom beam of the U-shaped base is less than 0.1/300.
Furthermore, the first adjusting mechanism comprises a sliding block, a sliding rail, a first screw and a first nut, wherein vertical rotating shafts of the left extrusion roller and the right extrusion roller are respectively and rotatably fixed on the sliding block, the sliding rail is arranged on the U-shaped base along the X-axis direction, and the sliding block is respectively in sliding fit with the sliding rail; the inner end of the first screw is fixedly connected with a sliding block, the first nuts are respectively fixed on two vertical side walls of the U-shaped base, and the first screw is spirally matched in the first nuts.
Furthermore, the second adjusting mechanism comprises a second screw rod which is fixedly connected to the top plate of the portal frame in an adjustable mode, the lower end of the second screw rod is fixedly connected with the inverted U-shaped seat, and the second screw rod can drive the inverted U-shaped seat to be positioned and closed with the side wall of the U-shaped base.
Further, the third adjusting mechanism comprises a hoisting arm, a shaft mounting part is arranged at the lower part of the hoisting arm, a hoisting slider is integrally connected to the bottom of the shaft mounting part, and the hoisting slider is in sliding fit in the second guide hole; the second guiding hole is formed in the top surfaces of the steps of the two side walls of the U-shaped base, the upper portion of the hoisting arm is integrally connected with a third screw rod, and the third screw rod is spirally matched in the top beam of the inverted U-shaped base.
Further, the slide rail top surface is the base locating surface, and back timber fixation nut position has the back timber locating surface, the U-shaped seat back timber of falling is less than 0.1/300 with U-shaped base floorbar depth of parallelism specifically does: the parallelism between the top beam positioning surface and the base positioning surface is less than 0.1/300.
Furthermore, at least 3 guide posts are arranged on two side walls of the inverted U-shaped seat, a positioning frustum is integrally arranged at the root of each guide post, first guide holes are formed in the tops of the two side walls of the U-shaped base corresponding to the guide posts, positioning taper holes are integrally formed in the tops of the first guide holes, and when the distance between the bottom surfaces of the two side walls of the inverted U-shaped seat and the top surface gap distance L of the two side walls of the U-shaped base are abutted, the positioning frustum is matched in a positioning taper hole to complete positioning and folding, and an up-and-down folding frame is formed.
Furthermore, the two third adjusting mechanisms are fixedly connected to the top beam of the inverted U-shaped seat; rotation axis X1-X1Both ends are rotatably mounted in the shaft mounting portions of the third adjustment mechanism, respectively.
Furthermore, the hanging slider and the second guide hole are in clearance fit, and the average clearance is larger than or equal to 0.1 mm.
Furthermore, the top beam of the inverted U-shaped seat is provided with a fixing nut, a top beam positioning surface is arranged at the position of the fixing nut, and the locking nut is in spiral fit with the third screw and abuts against the top beam positioning surface.
The squeeze roll device for high-frequency welding of the longitudinal welded pipe can finely adjust the levelness of the rotating shaft of the upper squeeze roll on the premise of positioning the up-and-down involutive frame, and accurately and simply adjusts the squeeze roll device which realizes the simultaneous enclosure of three rolls into a perfect circle.
Drawings
FIG. 1 is a front sectional view of a squeeze roll apparatus for high-frequency welding of a straight welded pipe according to the present invention.
1 left squeeze roll, 2 right squeeze rolls, 3 upper squeeze rolls, 4U-shaped bases, 5 inverted U-shaped bases and 6 portal frames
10 first adjusting mechanism, 11 slide block, 12 slide rail, 13 first screw rod, 14 first nut, 15 hand wheel, 16 first guide hole, 17 second guide hole, 18 step top surface
20 second adjusting mechanism, 22 second screw rod, 23 guide post, 24 positioning frustum, 25 positioning taper hole and 26 second nut
30 third adjusting mechanism, 31 hoisting arm, 32 shaft mounting part, 33 hoisting slider, 34 third screw, 35 locking nut and 36 top beam positioning surface
Detailed Description
The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings, but is not intended to limit the scope of the invention.
As shown in FIG. 1, a squeeze roll device for high-frequency welding of a straight welded pipe comprises
The left squeeze roll 1, the right squeeze roll 2 and the upper squeeze roll 3 jointly form a perfect circle, and the left squeeze roll 1 is provided with a vertical rotating shaft Y with adjustable position1-Y1(ii) a The right squeeze roll 2 has a vertical rotation axis Y whose position is adjustable2-Y2(ii) a The upper squeeze roll 3 has a rotation axis X1-X1Said axis of rotation X1-X1Is adjustable, while the axis of rotation X is of revolution1-X1The whole body can be adjusted up and down;
the left extrusion roll 1 and the right extrusion roll 2 are adjusted by a first adjusting mechanism 10; the upper squeeze roll 3 is adjusted by a second adjustment mechanism 20. The left extrusion roller 1 and the right extrusion roller 2 are slidably mounted on a U-shaped base 4, and the upper extrusion roller 3 is integrally mounted on an inverted U-shaped base 5 in an up-and-down adjusting manner. When the inverted U-shaped seat 5 is aligned with the side wall of the U-shaped base 4, the parallelism of the top beam of the inverted U-shaped seat 5 and the bottom beam of the U-shaped base 4 is less than 0.1/300.
The first adjusting mechanism 10 comprises a sliding block 11, a sliding rail 12, a first screw 13 and a first nut 14, wherein vertical rotating shafts of the left extrusion roller 1 and the right extrusion roller 2 are respectively and rotatably fixed on the sliding block 11, the sliding rail 12 is arranged on the U-shaped base 4 along the X-axis direction, and the sliding blocks 11 are respectively in sliding fit with the sliding rail 12; the slide rails 12 are preferably dovetail slide rails. The inner end of the first screw 13 is fixedly connected with the sliding block 11, and the first screw 13 is spirally matched in the first nut 14. The first nuts 14 are respectively fixed on two vertical side walls of the U-shaped base 4. The first adjusting mechanism 10 is responsible for adjusting and moving the sliding block 12 on the sliding rail along the X-axis direction through the cooperation of the first screw 13 and the first nut 14. The outer end of the first screw 13 is fixedly connected with a hand wheel 15.
The second adjusting mechanism 20 comprises a portal frame 21, a second nut 27 is vertically fixed on the portal frame 21 along the axis, a second screw 22 is spirally matched in the second nut 27, the lower end of the second screw 22 is fixedly connected with the inverted U-shaped seat 5, guide columns 24 are arranged on two side walls of the inverted U-shaped seat 5, first guide holes 16 are formed in the tops of two side walls of the U-shaped base 4, and the guide columns 24 are in guide fit in the first guide holes 16 in the tops of the side walls of the U-shaped base 4. The root of the guide post 24 is integrally provided with a positioning frustum 25, and the perpendicularity between the axis of the positioning frustum 25 and the bottom surfaces of the two side walls of the inverted U-shaped seat 5 is less than 0.01 mm. The top of the first guiding hole 16 is integrally provided with a positioning taper hole 26, and the perpendicularity between the axis of the positioning taper hole 26 and the top surfaces of the two side walls of the U-shaped base 11 is less than 0.01 mm. When the distance between the bottom surfaces of the two side walls of the inverted U-shaped seat 5 is equal to the gap distance L between the top surfaces of the two side walls of the U-shaped base 4, the positioning frustum 25 is positioned and matched in the positioning taper hole 26. The perpendicularity between the two side walls of the U-shaped base 4 and the bottom plate is less than 0.01mm, and the planeness of the upper surface and the lower surface of the bottom plate is less than 0.01 mm. The perpendicularity between the two side walls of the inverted U-shaped seat 5 and the top plate thereof is less than 0.01 mm.
The third adjusting mechanism 30 comprises a hoisting arm 31, a shaft mounting part 32 is arranged at the lower part of the hoisting arm 31, a hoisting slider 33 is integrally connected to the bottom of the shaft mounting part 32, and the hoisting slider 33 is in sliding fit in the second guide hole 17; second guide holes 17 are provided in stepped top surfaces 18 of both side walls of the U-shaped base 4. The upper part of the hoisting arm 31 is integrally connected with a third screw 34, the third screw 34 is spirally matched in a top beam fixing nut of the inverted U-shaped block 23, and a top beam positioning surface 36 is arranged at the position of the top beam fixing nut. The locking nut 35 is screwed with the third screw 34 and is tightly pressed against the positioning surface of the top beam. Rotation axis X1-X1Both ends are rotatably mounted in the shaft mounting portions 32 of the third adjustment mechanism 30, respectively; the third adjusting mechanism 30 is fixed on the top beam of the inverted U-shaped seat 23 in a manner of being independently adjusted up and down. The two third adjusting mechanisms 30 can adjust the rotating axis X1-X1The levelness of (2). The hanging slider 33 is in clearance fit with the second guide hole 17, and the average clearance is more than or equal to0.1mm。
The bottom plate of the U-shaped base 11 is horizontally and fixedly arranged on ground engineering, and the levelness is ensured to be less than or equal to 0.75: 1000.
The action principle is as follows: the left extrusion roll 1 and the right extrusion roll 2 are adjusted in place by rotating the hand wheel 15 of the first adjusting mechanism 10, and then the extrusion roll 3 is gradually and integrally moved downwards by the adjusting screw 22 of the second adjusting mechanism 20 until the positioning frustum 25 is positioned and matched in the positioning taper hole 26, and then the rotating shaft X is adjusted by the third adjusting mechanism 301-X1The levelness of the steel pipe enables the left extrusion roll 1, the right extrusion roll 2 and the upper extrusion roll 3 to jointly form a perfect circle, and continuous pressure welding of the edge of the steel pipe can be met.
When the positioning frustum 25 of the inverted U-shaped seat 23 is positioned and matched in the positioning taper hole 26 of the U-shaped seat, an up-and-down involutive frame is formed, the whole body moves downwards, and at the moment, the left extrusion roll 1, the right extrusion roll 2 and the upper extrusion roll 3 commonly enclose a perfect circle. However, in actual production, the upper squeeze roll still needs to be adjusted by the third adjusting mechanism 30 so that the edge butt meets the perfect circle requirement. The positioning frustum 25 and the positioning taper hole 26 can be respectively designed as single wear-resistant parts which can be replaced periodically, and are fixedly connected with the side wall of the inverted U-shaped seat 5 and the side wall of the U-shaped base 4.
The squeeze roll device for high-frequency welding of the longitudinal welded pipe can finely adjust the levelness of the rotating shaft of the upper squeeze roll on the premise of positioning the up-and-down involutive frame, and accurately and simply adjusts the squeeze roll device which realizes the simultaneous enclosure of three rolls into a perfect circle.
Claims (10)
1. The squeeze roll device for high-frequency welding of the longitudinal welded pipe is characterized by comprising a left squeeze roll (1), a right squeeze roll (2) and an upper squeeze roll (3) which jointly form a perfect circle, wherein the left squeeze roll (1) and the right squeeze roll (2) are slidably mounted on a U-shaped base (4), and the upper squeeze roll (3) is mounted on an inverted U-shaped base (5) in a vertically and integrally adjustable manner; the inverted U-shaped seat (5) is positioned and involuted with the side wall of the U-shaped base (4);
two side walls of the U-shaped base (4) are respectively provided with a first adjusting mechanism (10), and the first adjusting mechanisms (10) are respectively connected with the left extrusion roller (1) and the right extrusion roller (2); the left squeeze roll (1) has a vertical rotation axis Y with an adjustable position1-Y1The right squeeze roll (2) has a vertical rotation axis Y with adjustable position2-Y2The left extrusion roller (1) and the right extrusion roller (2) respectively adjust the positions of vertical rotating shafts of the left extrusion roller and the right extrusion roller through a first adjusting mechanism (10);
the extrusion device is characterized by further comprising a portal frame (6), wherein a second adjusting mechanism (20) is arranged on the top wall of the portal frame, the second adjusting mechanism (20) is connected with the inverted U-shaped seat (5), and the upper extrusion roller (3) is aligned to the rotating shaft X through the second adjusting mechanism (20)1-X1The whole body can be adjusted up and down;
the top wall of the inverted U-shaped seat (5) is provided with three adjusting mechanisms (30), and the upper squeeze roll (3) is provided with a rotating shaft X1-X1The upper extrusion roller (3) is aligned to the rotating shaft X through a third adjusting mechanism (30)1-X1Adjusting levelness of the steel tube.
2. The squeeze roll device for high-frequency welding of the longitudinal welded pipe according to claim 1, wherein when the inverted U-shaped seat (5) is positioned and aligned with the side wall of the U-shaped base (4), the parallelism of the top beam of the inverted U-shaped seat (5) and the bottom beam of the U-shaped base (4) is less than 0.1/300.
3. The squeeze roll device for high-frequency welding of the straight welded pipe according to claim 2, wherein the first adjusting mechanism (10) comprises a slide block (11), a slide rail (12), a first screw (13) and a first nut (14), wherein vertical rotating shafts of the left squeeze roll (1) and the right squeeze roll (2) are respectively and rotatably fixed on the slide block (11), the slide rail (12) is arranged on the U-shaped base (4) along the X-axis direction, and the slide blocks (11) are respectively and slidably fitted on the slide rail (12); the inner end of the first screw (13) is fixedly connected with the sliding block (11), the first nuts (14) are respectively fixed on two vertical side walls of the U-shaped base (4), and the first screw (13) is spirally matched in the first nuts (14).
4. The squeeze roll device for high-frequency welding of the longitudinal welded pipe according to claim 1, wherein the second adjusting mechanism (20) comprises a second screw rod (22) which is adjustably and fixedly connected to a top plate of a portal frame, the lower end of the second screw rod (22) is fixedly connected with the inverted U-shaped seat (5), and the second screw rod (22) can drive the inverted U-shaped seat (5) to be positioned and abutted against the side wall of the U-shaped base (4).
5. The squeeze roll device for high-frequency welding of the longitudinal welded pipe according to claim 4, wherein the third adjusting mechanism (30) comprises a hoisting arm (31), a shaft mounting part (32) is arranged at the lower part of the hoisting arm (31), a hanging slider (33) is integrally connected to the bottom of the shaft mounting part (32), and the hanging slider (33) is slidably fitted in the second guide hole (17); the second guide holes (17) are arranged in the step top surfaces (19) of the two side walls of the U-shaped base (4), the upper parts of the hoisting arms (31) are integrally connected with third screw rods (34), and the third screw rods (34) are spirally matched in top beams of the inverted U-shaped base (5).
6. The squeeze roll device for high-frequency welding of the longitudinal welded pipe according to claim 3, wherein the top surface of the slide rail (12) is a base positioning surface (18), the top beam fixing nut position is provided with a top beam positioning surface (36), and the parallelism between the top beam of the inverted U-shaped seat (5) and the bottom beam of the U-shaped base (4) is less than 0.1/300: the parallelism between the top beam positioning surface (36) and the base positioning surface (18) is less than 0.1/300.
7. The squeeze roll device for high-frequency welding of the straight welded pipe according to claim 1, wherein at least 3 guide posts (24) are arranged on two side walls of the inverted U-shaped seat (5), a positioning frustum (25) is integrally arranged at the root of each guide post (24), first guide holes (16) are formed in the tops of two side walls of the U-shaped seat (4) corresponding to the guide posts, positioning taper holes (26) are integrally formed in the tops of the first guide holes (16), and when the bottom surfaces of the two side walls of the inverted U-shaped seat (5) are spaced from the top surface of the two side walls of the U-shaped seat (4) in a gap L manner, the positioning frustum (25) is positioned and matched in the positioning taper holes (26) to complete the positioning and folding to form an up-down folding frame.
8. The squeeze roll device for high-frequency welding of a longitudinal welded pipe according to claim 5, which comprisesIs characterized in that the two third adjusting mechanisms (30) are fixedly connected to the top beam of the inverted U-shaped seat; rotation axis X1-X1Both ends are rotatably mounted in the shaft mounting parts (32) of the third adjusting mechanism (30), respectively.
9. The squeeze roller device for high-frequency welding of a straight welded pipe according to claim 5, wherein the fitting of the hanger slider (33) and the second guide hole (17) is a clearance fitting, and the average clearance is 0.1mm or more.
10. The squeeze roll device for high-frequency welding of straight welded pipes according to claim 5, wherein the top beam of the inverted U-shaped seat (5) is provided with a fixing nut, the fixing nut is provided with a top beam positioning surface (36), and the locking nut (35) is in threaded fit with the third screw rod (34) and abuts against the top beam positioning surface (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921119172.5U CN210451355U (en) | 2019-07-16 | 2019-07-16 | Extrusion roller device for high-frequency welding of longitudinal welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921119172.5U CN210451355U (en) | 2019-07-16 | 2019-07-16 | Extrusion roller device for high-frequency welding of longitudinal welded pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210451355U true CN210451355U (en) | 2020-05-05 |
Family
ID=70445810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921119172.5U Active CN210451355U (en) | 2019-07-16 | 2019-07-16 | Extrusion roller device for high-frequency welding of longitudinal welded pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210451355U (en) |
-
2019
- 2019-07-16 CN CN201921119172.5U patent/CN210451355U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20090054083A (en) | Welding apparatus of h-beam | |
| JP6737962B2 (en) | Assembled welding mill for the production of pipes | |
| CN211162699U (en) | Small-bore pipeline welding set | |
| CN113714330B (en) | Fifteen-roller middle plate straightener with adjustable roll gap spacing and operation method thereof | |
| CN114273766B (en) | Plasma welding equipment for medium and thick plate and working method thereof | |
| CN210451355U (en) | Extrusion roller device for high-frequency welding of longitudinal welded pipe | |
| CN219292955U (en) | A integrated into one piece machine for T shaped steel structure | |
| CN216989278U (en) | Plate leveler | |
| CN214683598U (en) | Steel pipe welding bead leveling device | |
| CN213702365U (en) | Assemblage machine of H shaped steel production usefulness | |
| CN212823023U (en) | Feeding device for pipe cutting machine | |
| CN216460953U (en) | Welding I-steel orthotic devices | |
| CN211386440U (en) | Welded pipe forming and extruding device | |
| CN111940541A (en) | Automatic adjusting die of thin-wall metal plate spiral butt welding air pipe forming unit | |
| CN109277444B (en) | Leveling rib pressing machine, using method thereof and air pipe production line | |
| CN211637818U (en) | Straightening roller frame | |
| CN110773849B (en) | Gantry type tower tube joint welding machine | |
| CN210586536U (en) | Sheet metal plate rolling machine | |
| CN213079579U (en) | Leveling and rib-pressing continuous forming device of thin-wall metal plate spiral butt welding unit | |
| RU2668237C1 (en) | Assembling and welding mill for pipe manufacture | |
| CN213079578U (en) | Resistance-free guide mechanism of thin-wall metal plate spiral butt welding unit mould | |
| CN101844163B (en) | Machine set for producing medium-caliber straight-seam double-sided submerged-arc welding steel pipe and forming method of steel pipe | |
| CN219852819U (en) | Lifting type welding device for bracket | |
| CN215699033U (en) | Can body welding machine | |
| CN219936758U (en) | Cable sheath forming wheel device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 256200 Jiaoqiao town Jiaolin Road West, diaosong village north, Zouping County, Binzhou City, Shandong Province Patentee after: Shandong Juncheng Chuangxin PIPE Tech. Co.,Ltd. Address before: 256200 Jiaoqiao town Jiaolin Road West, diaosong village north, Zouping County, Binzhou City, Shandong Province Patentee before: SHANDONG JUNCHENG INNOVATIVE PIPE TECHNOLOGY CO.,LTD. |