CN109570875B - Pipe connection welding anti-deformation device for small-diameter thin-wall cylinder - Google Patents
Pipe connection welding anti-deformation device for small-diameter thin-wall cylinder Download PDFInfo
- Publication number
- CN109570875B CN109570875B CN201811637278.4A CN201811637278A CN109570875B CN 109570875 B CN109570875 B CN 109570875B CN 201811637278 A CN201811637278 A CN 201811637278A CN 109570875 B CN109570875 B CN 109570875B
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- Prior art keywords
- plate
- cylinder
- mandrel
- long rod
- wedge
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- 238000003466 welding Methods 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a connecting pipe welding deformation preventing device of a small-diameter thin-wall cylinder, which comprises a supporting plate (2), an adjusting device and a mandrel (1), wherein the adjusting device comprises a wedge block (6), a limiting block (7) and a long rod (8). The connecting pipe welding deformation preventing device for the small-diameter thin-wall cylinder is of a mechanical connection structure, can tightly support all parts inside through transmission of a simple thread structure, and can keep a tightly supported state through good self-locking capability even if the cylinder has a shrinkage trend under the action of welding stress, so that the welding deformation of the cylinder is effectively controlled. Meanwhile, the mandrel (1) is arranged, so that the pipe (11) to be welded can be effectively prevented from tilting.
Description
Technical Field
The invention relates to a welding deformation preventing device, in particular to a connecting pipe welding deformation preventing device for a small-diameter thin-wall long cylinder body.
Background
In the field of pressure vessels or chemical industry, small-diameter pressure vessels often occur, which are characterized in that the diameter of the cylinder is very small, the human body is difficult to enter, the cylinder wall is very thin, the length of the cylinder is long, and the length L can reach 1-2 meters.
At this time, a small connecting pipe is welded on the cylinder, and according to a welding deformation rule, the local shrinkage of the cylinder is caused to sink (the welding deformation of stainless steel is more serious) when the connecting pipe is welded, and the axis of the connecting pipe also deviates from the theoretical position, so that the perpendicularity of the connecting pipe and the roundness of the cylinder are ensured, and deformation prevention measures are required. However, the connecting pipe is too far away from the end face of the cylinder body, so that the hand cannot operate the traditional deformation prevention means cannot be implemented.
Disclosure of Invention
In order to solve the problems, the invention provides a connecting pipe welding deformation preventing device for a small-diameter thin-wall cylinder, which comprises a supporting plate and an adjusting device, wherein all parts in the device can be tightly supported through transmission of a simple thread structure, and even if the cylinder has shrinkage tendency under the action of welding stress, the device can also keep a tightly supported state through good self-locking capability, so that the welding deformation of the cylinder can be effectively controlled. Meanwhile, the mandrel is inserted into the connecting pipe, so that the integral stability of the cylinder body can be kept in the clamping process, and the axis of the connecting pipe can be prevented from deviating from the theoretical position in the welding process, thereby completing the invention.
Specifically, the invention aims to provide a connecting pipe welding deformation preventing device for a small-diameter thin-wall cylinder, which comprises a supporting plate and an adjusting device for adjusting the supporting plate, wherein the adjusting device can adjust the supporting plate to move along the radial direction of the cylinder so as to be tightly attached to the inner wall of the small-diameter thin-wall cylinder, so that the cylinder wall is tightly supported, and the cylinder is prevented from shrinking and sinking during welding the connecting pipe.
The connecting pipe welding anti-deformation device of the small-diameter thin-wall cylinder body provided by the invention has the following beneficial effects:
1) The device is particularly suitable for small-diameter thin-wall cylinders which cannot be operated by hands due to space limitation.
2) The operation of the device is completed by the worker outside the cylinder body far from the welding place.
3) The invention has reliable deformation resistance, difficult looseness and convenient disassembly.
4) The whole device is of a mechanical connection structure, flexible in use and strong in universality.
5) The device adopts a fully mechanical connection structure, has larger flexibility in use, and can meet the deformation-preventing requirements of the cylinders with different diameters by replacing one or more parts.
Drawings
FIG. 1 is a schematic view of a small diameter pressure vessel with a nipple;
FIG. 2 is a schematic view of the pipe joint welding deformation preventing device of the small-diameter thin-wall cylinder body of the invention;
fig. 3 is a left side view (left side) and a front side view (right side) of the support plate.
Reference numerals illustrate:
The reference numerals are as follows:
1-mandrel
2-Support plate
3-Roof
3' -Baseboard
4-Front end plate
5-Bolt
6-Wedge block
7-Limiting block
8-Long rod
9-Rear end plate
10-Weld zone
11-Pipe to be welded
Detailed Description
The invention is further described in detail below by means of the figures and examples. The features and advantages of the present invention will become more apparent from the description.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In the field of pressure vessels or chemical industry, small diameter pressure vessels are often found, on which a nipple is welded, as shown in fig. 1. The container is characterized in that the diameter of the cylinder is small, the human body is difficult to enter, the cylinder wall is thin, and the length of the cylinder is long and can reach 1-2 meters.
Therefore, in the case of the pressure vessel having the small diameter, the partial shrinkage and sinking of the cylinder are easily caused when the small connecting pipe is welded to the cylinder. In order to maintain the roundness of the cylinder, deformation prevention measures are required.
To this end, according to the invention, a device for preventing deformation of a small-diameter thin-walled cylinder for pipe connection welding is provided.
The invention relates to a connecting pipe welding deformation preventing device of a small-diameter thin-wall cylinder, which comprises a supporting plate 2 and an adjusting device for adjusting the supporting plate 2, as shown in figure 2.
The upper end face of the supporting plate 2 is arc-shaped, and can be preferably attached to the inner wall of the cylinder, the lower end face of the supporting plate 2 is an inclined plane, and the inclined angle of the inclined plane is the self-locking angle of the material. The width dimension of the upper portion of the support plate 2 is slightly smaller than the slot dimension of the top plate 3, so that the support plate 2 can move up and down without tilting itself, as shown in fig. 3.
In order to prevent the shrinkage sagging of the cylinder, it is necessary to provide a supporting force to the cylinder inside the cylinder to resist the deformation force generated at the time of welding. The support plate 2 is only high enough to function. The adjusting device can be used for adjusting the height of the support plate 2, and before entering the cylinder, the support plate is not required to be too high so as to be convenient to enter, after entering the appointed position of the cylinder, the support plate 2 can move radially along the cylinder through the adjusting device, and can be attached to the inner wall of the cylinder or separated from contact with the inner wall of the cylinder.
The adjusting device comprises a wedge-shaped block 6, a limiting block 7 and a long rod 8, as shown in figure 2. Preferably, the long rod 8 can drive the limiting block 7 to advance or retreat along the length direction of the long rod 8, so that the wedge-shaped block 6 is pushed to move back and forth along the length direction of the long rod 8, and the supporting plate 2 can be adjusted to be tightly attached to the inner wall of the cylinder in the radial direction of the cylinder or be separated from contact with the inner wall of the cylinder.
The cross section of the wedge-shaped block 6 along the length direction of the long rod 8 is gradually increased, preferably the outer surface of the wedge-shaped block 6 is an inclined surface, more preferably the inclined angle of the inclined surface of the wedge-shaped block 6 is the same as the inclined angle of the inclined surface of the lower end surface of the support plate 2, so that the wedge-shaped block 6 can be in inclined contact with the support plate 2.
The section of the upper end of the supporting plate 2 is arc-shaped and matched with the inner diameter of the cylinder, the section of the lower end of the supporting plate 2 is inclined and matched with the outer surface of the wedge-shaped block 6.
According to the invention, the contact surface of the supporting plate 2 and the wedge-shaped block 6 is an inclined surface, the gradient exists, and the relative displacement between the supporting plate 2 and the wedge-shaped block 6 can be changed by adjusting the relative motion between the supporting plate 2 and the wedge-shaped block 6, so that the height of the supporting plate 2 in the radial direction of the cylinder body is adjusted. Meanwhile, the inclination angle between the wedge-shaped block 6 and the support plate 2 is the self-locking angle of the material, so that the support plate 2 can be ensured not to loosen when the cylinder body contracts to generate extrusion force.
Preferably, the wedge-shaped block 6 can be a round table, a through hole is arranged in the axial middle of the round table, and the wedge-shaped block 6 is sleeved on the long rod 8 through the through hole.
The limiting block 7 is arranged on the long rod 8 and is used for fixing the wedge-shaped block 6, preferably a locking nut, and is installed on the long rod 8 through threaded connection.
The long rod can horizontally move, preferably, the end part of the long rod 8 is provided with threads, and the long rod horizontally moves through rotation of the threads.
In order to arrange the support plate 2 around the weld 10, the invention also comprises a frame-shaped structure comprising a front end plate 4, a rear end plate 9, a top plate 3 and optionally a bottom plate 3'. The front end plate 4, the rear end plate 9, the top plate 3 and optionally the bottom plate 3' are fixedly connected, preferably by means of bolts 5, to form a stable frame-shaped structure.
Limiting holes are formed in the top plate 3 and the bottom plate 3', and the lower end of the supporting plate 2 penetrates through the limiting holes in the top plate 3 and the bottom plate 3' and is in contact with the wedge-shaped block 6.
Preferably, at least two groups of limiting holes are arranged on the top plate 3 and the bottom plate 3', the limiting holes are distributed around the weld zone 10, and threaded holes are further arranged on the top plate 3 right below the center of the connecting pipe mouth 10.
The front end plate 4 is provided with a thread groove, and the long rod 8 is connected with the front end plate 4 through threads.
Preferably, the rear end plate 9 is provided with a through hole, the long rod 8 passes through the rear end plate 9 to be connected with the front end plate 4 through threads, and the long rod 8 can move along a threaded hole on the front end plate 4 through the threads.
According to a preferred embodiment of the invention, threaded holes are provided in the top plate 3.
Because the support plate is tightly attached to the inner wall of the cylinder, the whole device and the cylinder are easily caused to rotate together when the long rod 8 is rotated. In addition, the connecting pipe is welded on the pressure vessel with thin wall and small diameter, and the axis of the connecting pipe is easy to deviate from the theoretical position, so that the connecting pipe is inclined.
In order to solve the above problems, according to the present invention, the apparatus further comprises a mandrel 1, the mandrel 1 is inserted into the cylinder through the weld zone 10, the length of the mandrel 1 is longer than the length of the pipe 11 to be welded, and the outer diameter of all or at least one section of the mandrel 1 is smaller than the inner diameter of the pipe 11 to be welded.
The length of the mandrel 1 is larger than that of the pipe 11 to be welded, and the outer diameter of all or at least one section of the mandrel 1 is smaller than the inner diameter of the pipe 11 to be welded at the part where the mandrel 1 coincides with the pipe 11 to be welded.
The fixing action can only be exerted if the diameter of the mandrel 1 is slightly smaller than the inner diameter of the pipe 11 to be welded. If the diameter of the mandrel 1 is too small compared to the inner diameter of the pipe 11 to be welded, it cannot function to keep the pipe 11 to be welded vertical.
In order to facilitate the insertion and the extraction, at least one section of diameter of the mandrel 1 is matched with the inner diameter of the pipe 11 to be welded at the overlapping part of the mandrel 1 and the pipe 11 to be welded.
The upper end of the mandrel 1 is provided with a unthreaded hole or a handle, so that the mandrel 1 is convenient to install and detach.
The lower end of the mandrel 1 is provided with external threads, and the external threads are matched with threaded holes in the top plate 3.
The lower extreme of dabber 1 passes through threaded connection and fixes on roof 3, fixes dabber 1 on roof 3 through threaded connection for frame structure can provide the fulcrum for dabber 1, not only can guarantee that whole set of device can not rotate because of screwing up adjusting device, but also can guarantee the straightness that hangs down of waiting to weld pipe 11 when the welding waits to weld pipe 11.
According to the present invention, by using the above-mentioned device when welding the adapter tube on the small-diameter thin-wall cylinder, the deformation of the cylinder and the inclination of the adapter tube can be prevented, and the use method of the present invention comprises the following steps:
step 1, the support plate 2 of the deformation preventing device, the adjusting device and the frame-shaped structure are installed and placed in the cylinder to be welded, the mandrel 1 is inserted by the weld zone 10, and preferably, the lower end of the mandrel 1 is in threaded connection with the top plate 3.
And 2, rotating the long rod 8, and enabling the long rod 8 to advance along the threaded hole in the front end plate 4 to drive the limiting block 7 to advance, and simultaneously pushing the wedge-shaped block 6 to be in inclined surface contact with the support plate 2 until screwing.
And 3, sleeving the pipe 11 to be welded on the mandrel 1 for welding, wherein the pipe 11 to be welded is fixed on the cylinder body by spot welding before the deformation preventing device is installed.
And 4, after the welding is finished, the mandrel 1 is disassembled, then the long rod 8 is rotated in the opposite direction, and the device is disassembled and taken out.
The order of installing the mandrel 1 and the pipe 11 to be welded may be adjusted, the mandrel 1 may be inserted into the weld zone 10 and screwed to the top plate 3, or the pipe 11 to be welded may be spot-welded to the cylinder, and the mandrel 1 may be inserted. The former mounting sequence is more convenient to operate than the latter, facilitating quick alignment of the threaded holes in the spindle 1 and the top plate 3.
Because the device adopts a fully mechanical connection structure, the device has great flexibility in use, and can meet the deformation-preventing requirements of the cylinders with different diameters by replacing one or more parts. Therefore, the installation needs to be performed before the present device is used.
The installation mode of the pipe connection welding deformation preventing device of the invention can be various, and is not particularly limited, but preferably comprises the following substeps:
step 1, selecting a top plate 3, a bottom plate 3', a supporting plate 2 and a mandrel 1 according to the sizes of a cylinder to be welded and a pipe 11 to be welded;
Step 2, penetrating the long rod 8 through the rear end plate 9, and mounting the limiting block 7 and the wedge-shaped block 6 on the long rod 8;
A substep 3, connecting a long rod 8 into a threaded hole of the front end plate 4, and pre-adjusting the positions of a limiting block 7 and a wedge block 6 according to the positions of limiting holes on the top plate 3 and the bottom plate 5;
a substep 4 of connecting the top plate 3 and the bottom plate 3' with the front end plate 4 and the rear end plate 9 through bolts;
And 5, inserting the supporting plate 2 into the limit holes on the top plate 3 and the bottom plate 5 so that the supporting plate is just placed on the wedge-shaped block 6.
According to a preferred embodiment of the present invention there is provided: the supporting plates 2 are 2 groups, each group of 2 blocks, and correspondingly, the limiting holes on the top plate 3 and the bottom plate 5 are also two groups, and the two groups of supporting plates 2 respectively penetrate through the limiting holes on the top plate 3 and the bottom plate 3' and are arranged around the welding seam area 10 for supporting the cylinder body, and the figure 2 can be seen specifically.
The top plate 3, bottom plate 3', support plate 2 and mandrel 1 are selected according to the size of the cylinder to be welded and the pipe 11 to be welded. The long rod 8 passes through the rear end plate 9, and the limiting block 7 and the wedge-shaped block 6 are arranged on the long rod 8. The long rod 8 is then connected to the threaded holes of the front end plate 4, and the positions of the stopper 7 and the wedge 6 are adjusted in advance according to the positions of the stopper holes on the top plate 3 and the bottom plate 3'. The top plate 3 and the bottom plate 3 'are then connected with the front end plate 4 and the rear end plate 9 by bolts, and finally the support plate 2 is inserted into the limit holes on the top plate 3 and the bottom plate 3' so as to be just placed on the wedge-shaped block 6.
The installed device is placed in a cylinder to be welded, and the mandrel 1 is inserted into the weld zone 10 and is in threaded connection with the top plate 3. When the pipe 11 to be welded is welded, the long rod 8 is rotated to drive the limiting block 7 to advance along the long rod 8, so that the wedge-shaped block 6 is pushed to move upwards on the long rod 8. The contact surface between the lower end of the supporting plate 2 and the outer surface of the wedge-shaped block 6 is an inclined surface, the contact surface between the wedge-shaped block 6 and the supporting plate 2 is increased along with the forward movement of the wedge-shaped block 6, and the supporting plate 2 starts to move up and down under the pushing of the wedge-shaped block 6, so that the supporting plate 2 is tightly attached to the inner wall of the small-diameter thin-wall cylinder body, the cylinder wall is tightly supported, and the shrinkage and subsidence of the cylinder body when the pipe 11 to be welded are prevented.
When welding is finished, the long rod 8 is rotated to drive the limiting block 7 to retreat along the long rod 8, so that the wedge-shaped block 6 is pushed to move backwards on the long rod 8. The contact surface between the lower end of the support plate 2 and the outer surface of the wedge-shaped block 6 is an inclined surface, and as the wedge-shaped block 6 advances backward, the contact surface between the wedge-shaped block 6 and the support plate 2 is reduced, and the support plate 2 starts to fall back, so that the height of the support plate 2 is reduced. The mandrel 1 is then removed and the device is removed from the cartridge.
The invention has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the invention can be subjected to various substitutions and improvements, and all fall within the protection scope of the invention.
Claims (3)
1. The utility model provides a take over welding deformation preventing device of minor diameter thin wall barrel which characterized in that: comprises a supporting plate (2) and an adjusting device for adjusting the supporting plate (2);
The upper end face of the supporting plate (2) is arc-shaped and can be attached to the inner wall of the cylinder, and the lower end face of the supporting plate (2) is an inclined plane;
the adjusting device comprises a wedge block (6), a limiting block (7) and a long rod (8); the limiting block (7) can be driven to advance or retreat along the length direction of the long rod (8) through the long rod (8), so that the wedge block (6) is pushed to move forwards and backwards along the length direction of the long rod (8), and the supporting plate (2) can be adjusted to be tightly attached to the inner wall of the cylinder in the radial direction of the cylinder or be separated from contact with the inner wall of the cylinder;
The inclined angle of the inclined surface of the outer surface of the wedge block (6) is the same as the inclined angle of the inclined surface of the lower end surface of the support plate (2), so that the wedge block (6) and the support plate (2) can be in inclined surface contact, and the inclined angle of the lower end surface of the support plate (2) is the self-locking angle of the wedge block (6) and the material of the support plate (2);
The limiting block (7) is arranged on the long rod (8) and used for fixing the wedge-shaped block (6), and threads are arranged at the end part of the long rod (8);
The device also comprises a frame-shaped structure comprising a top plate (3), a front end plate (4), a rear end plate (9) and a bottom plate (3');
A thread groove is formed in the front end plate (4), and the long rod (8) is connected with the front end plate (4) through threads;
Limiting holes are formed in the top plate (3) and the bottom plate (3 '), and the lower end of the supporting plate (2) penetrates through the limiting holes in the top plate (3) and the bottom plate (3') and is contacted with the wedge-shaped block (6);
a threaded hole is formed in the top plate (3);
The device also comprises a mandrel (1), the mandrel (1) is inserted into the cylinder body through the welding seam area (10), the length of the mandrel (1) is larger than that of the pipe (11) to be welded, and the outer diameter of all or at least one section of the mandrel (1) is smaller than the inner diameter of the pipe (11) to be welded.
2. The adapter tube welding deformation preventing device according to claim 1, wherein:
The upper end of the mandrel (1) is provided with a unthreaded hole or a handle, so that the mandrel (1) can be conveniently installed and detached.
3. The adapter tube welding deformation preventing device according to claim 1, wherein: the lower end of the mandrel (1) is provided with external threads, and the external threads are matched with threaded holes in the top plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811637278.4A CN109570875B (en) | 2018-12-29 | 2018-12-29 | Pipe connection welding anti-deformation device for small-diameter thin-wall cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811637278.4A CN109570875B (en) | 2018-12-29 | 2018-12-29 | Pipe connection welding anti-deformation device for small-diameter thin-wall cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109570875A CN109570875A (en) | 2019-04-05 |
| CN109570875B true CN109570875B (en) | 2024-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811637278.4A Active CN109570875B (en) | 2018-12-29 | 2018-12-29 | Pipe connection welding anti-deformation device for small-diameter thin-wall cylinder |
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| CN (1) | CN109570875B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139749A (en) * | 2020-09-23 | 2020-12-29 | 中国航发贵州黎阳航空动力有限公司 | Welding tool and welding method for annular cylinder mounting seat |
| CN113751954B (en) * | 2021-08-19 | 2023-07-28 | 哈电集团（秦皇岛）重型装备有限公司 | Large steam generator sleeve anti-seismic block welding collapse prevention device and method |
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| CN203282128U (en) * | 2013-04-27 | 2013-11-13 | 洛阳建浩重工机械有限公司 | Tool for welding minor-diameter barrel and connecting tube |
| CN104999219A (en) * | 2015-07-16 | 2015-10-28 | 成都市松川金属材料有限公司 | Round pipe machining clamping device |
| CN206662511U (en) * | 2017-03-24 | 2017-11-24 | 山西阳煤化工机械（集团）有限公司 | A kind of positioning tool for welding emplacement type adapter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0542393A (en) * | 1991-08-12 | 1993-02-23 | Mitsubishi Electric Corp | Body pipe joining welding deformation preventing device |
| CN201592328U (en) * | 2009-11-16 | 2010-09-29 | 国营红阳机械厂 | Thin-walled cylinder-shaped piece circumferential seam adjustable supporting device |
| CN202271138U (en) * | 2011-09-15 | 2012-06-13 | 湖北三江航天江北机械工程有限公司 | Circular seam butt welding fixture for small-diameter thin-wall cylindrical shell |
| CN103433765A (en) * | 2013-08-20 | 2013-12-11 | 天津大学 | Adjustable self-centering inner supporting device for machining thin-wall tubular part |
| CN106584147A (en) * | 2016-11-29 | 2017-04-26 | 成都嘉新特种精密铸造有限公司 | Novel drilling and clamping device for flange plate |
| CN206296482U (en) * | 2016-12-09 | 2017-07-04 | 辽沈工业集团有限公司 | A kind of thin-wall barrel clamp for machining |
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- 2018-12-29 CN CN201811637278.4A patent/CN109570875B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203282128U (en) * | 2013-04-27 | 2013-11-13 | 洛阳建浩重工机械有限公司 | Tool for welding minor-diameter barrel and connecting tube |
| CN104999219A (en) * | 2015-07-16 | 2015-10-28 | 成都市松川金属材料有限公司 | Round pipe machining clamping device |
| CN206662511U (en) * | 2017-03-24 | 2017-11-24 | 山西阳煤化工机械（集团）有限公司 | A kind of positioning tool for welding emplacement type adapter |
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| CN109570875A (en) | 2019-04-05 |
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