CN210586534U - Arc surface compression roller of pre-welding machine - Google Patents
Arc surface compression roller of pre-welding machine Download PDFInfo
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- CN210586534U CN210586534U CN201920941868.XU CN201920941868U CN210586534U CN 210586534 U CN210586534 U CN 210586534U CN 201920941868 U CN201920941868 U CN 201920941868U CN 210586534 U CN210586534 U CN 210586534U
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Abstract
The arc surface compression roller of the pre-welding machine comprises a roller sleeve and a mandrel, wherein the roller sleeve and the mandrel are connected through two self-aligning roller bearings, a spacer ring is installed between outer rings of the two self-aligning roller bearings, two ends of each self-aligning roller bearing are respectively provided with a gland, the gland and the roller sleeve are connected together through an inner hexagon screw, the gland compresses the self-aligning roller bearings, an O-shaped ring is installed on the gland, the roller surface of the roller sleeve is of an arc surface structure, and the roller surface radius R of the roller sleeve is 400-plus-700 mm. The utility model can avoid the indentation formed in the process of seaming the steel pipe blank, and improve the quality of the steel pipe; meanwhile, the structure is simple, the assembly and disassembly are convenient and quick, the standardization is easy to realize, and the device can be better suitable for field use.
Description
Technical Field
The utility model belongs to the technical field of mechanical equipment.
Background
On a longitudinal submerged arc welding steel pipe production line, a JCO forming machine presses a steel plate step by step for multiple times, the steel plate is plastically deformed into a C shape and then enters a pre-welding machine, and an open pipe blank is subjected to seam closing and welding through extrusion of a pre-welding press roller. Due to the characteristic of multi-pass pressing, the steel plate has circular arcs and straight edges after each pressing. The tube blank formed after the multi-pass pressing is of a polygonal structure formed by alternating arcs and straight sides. Meanwhile, as the performance of the steel plate changes, the process indexes such as ovality, front and back opening amount and the like of the pipe blank have certain deviation, and the shape of the pipe blank entering the pre-welding machine is unstable.
The pre-welding machine is a special device for seaming straight seam steel pipes, and 9 groups of compression roller mechanisms are arranged on an annular frame, and each group of compression roller mechanism consists of an angle rotating device, a telescopic lead screw, a roller beam and a plurality of compression rollers. And 9 groups of press rolls simultaneously extrude the C-shaped open tube blank, and the C-shaped open tube blank is extruded and seamed into an O shape and then welded. The roll sleeve of the press roll is contacted with the tube blank to extrude the tube blank. The original press roll structurally comprises eight parts such as a roll sleeve, an end cover, a self-aligning roller bearing, a mandrel and the like, wherein the roll sleeve is of a cylindrical structure, the press roll is stressed to deviate from the center of the press roll frequently due to reasons such as unstable tube blank shape, polygonal structure of the tube blank, angle of a press roll beam and the like, edge corners of the edge of the press roll are in contact with the tube blank of the steel tube seriously, and after the contact area is too small, serious indentation is formed on the steel tube, so that the quality of the steel tube.
Disclosure of Invention
The utility model aims at providing a pre-welding machine arc surface compression roller, which ensures the contact area between the pipe blank and the roller surface of the compression roller by optimizing the roller surface structure of the compression roller, avoids the formation of indentation in the process of seaming the pipe blank of the steel pipe and improves the quality of the steel pipe; meanwhile, the structure is simple, the assembly and disassembly are convenient and quick, the standardization is easy to realize, and the device can be better suitable for field use.
The utility model provides a scheme that technical problem adopted is:
the arc surface compression roller of the pre-welding machine comprises a roller sleeve 1 and a mandrel 6, wherein the roller sleeve 1 is connected with the mandrel 6 through two self-aligning roller bearings 8, a spacer ring 7 is installed between outer rings of the two self-aligning roller bearings 8, two ends of each self-aligning roller bearing 8 are respectively provided with a gland 4, the glands 4 are connected with the roller sleeve 1 through inner hexagon screws 2, and the glands 4 compress the self-aligning roller bearings 8 to realize axial positioning; an O-shaped ring 5 is arranged on the gland 4 to seal bearing lubricating grease. The roller surface of the roller sleeve 1 is of an arc surface structure, and the radius R is 400-700 mm.
The utility model discloses an actively the effect does:
the utility model discloses a compression roller adopts the arc surface structure, and the roll surface center is high, and both sides edges and corners are low, can guarantee roll surface central zone and pipe contact in the joint close process, can guarantee through selecting reasonable roll surface radian that area of contact is moderate, avoids appearing area of contact undersize, even line contact. The problem of forming indentations on the pipe blank can be solved, the appearance quality of the steel pipe is improved, the requirements of a pre-welding machine on the shape of the pipe blank are reduced, the process scheme of a forming machine is increased, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the arc surface compression roller of the pre-welding machine comprises a roller sleeve 1 and a mandrel 6, the roller sleeve 1 is connected with the mandrel 6 through two self-aligning roller bearings 8, a spacer ring 7 is installed between outer rings of the two self-aligning roller bearings 8, two ends of each self-aligning roller bearing 8 are respectively provided with a gland 4, the glands 4 are connected with the roller sleeve 1 by adopting inner hexagonal screws 2, and the glands 4 compress the self-aligning roller bearings 8 to realize axial positioning; an O-shaped ring 5 is arranged on the gland 4 to seal bearing lubricating grease. The roller surface of the roller sleeve 1 is of an arc surface structure, and the radius R is 400-700 mm.
When the device works, 0 to 8 groups of press rolls extrude the open tube blank to fold the tube blank into an O shape. The central line of each compression roller points to the circle center, the middle area of the compression roller sleeve 1 is contacted with the steel pipe blank, and no indentation exists. When a deviation a degrees appears in some press rolls (No. Nr3 press rolls), the edge angle at the lower side of the press roll is in line contact with the tube blank to form an indentation, which affects the quality of the steel tube. Adopt the arc surface compression roller, radius R is 400 and supplys power 700mm, and the compression roller both sides edges and corners is low in the middle of for the roller shell, and when the deviation appeared in the compression roller group, the regional contact in the middle of the roller shell 1 can prevent that the indentation from appearing in compression roller edges and corners and steel pipe contact, has eliminated because the indentation problem that equipment deviation, pipe shape change arouse.
Claims (2)
1. Welding machine arc surface compression roller in advance, including roller shell and dabber, connect through two self-aligning roller bearing between roller shell and dabber, install the spacer ring between two self-aligning roller bearing outer rings, self-aligning roller bearing both ends respectively have a gland, and interior hex head screw links together gland and roller shell, and the gland compresses tightly self-aligning roller bearing, installs O type circle on the gland, its characterized in that: the roller surface of the roller sleeve is of a circular arc surface structure.
2. The pre-welder arc surface pressing roller as set forth in claim 1, wherein: the roller surface radius R of the roller sleeve is 400-700 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920941868.XU CN210586534U (en) | 2019-06-21 | 2019-06-21 | Arc surface compression roller of pre-welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920941868.XU CN210586534U (en) | 2019-06-21 | 2019-06-21 | Arc surface compression roller of pre-welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210586534U true CN210586534U (en) | 2020-05-22 |
Family
ID=70715236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920941868.XU Active CN210586534U (en) | 2019-06-21 | 2019-06-21 | Arc surface compression roller of pre-welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210586534U (en) |
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2019
- 2019-06-21 CN CN201920941868.XU patent/CN210586534U/en active Active
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