CN111168318A - Anti-deformation method and tool for welding and heat treatment of stainless steel cylinder - Google Patents
Anti-deformation method and tool for welding and heat treatment of stainless steel cylinder Download PDFInfo
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- CN111168318A CN111168318A CN202010058519.0A CN202010058519A CN111168318A CN 111168318 A CN111168318 A CN 111168318A CN 202010058519 A CN202010058519 A CN 202010058519A CN 111168318 A CN111168318 A CN 111168318A
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- 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
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0531—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor internal pipe alignment clamps
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- 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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
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Abstract
The invention discloses an anti-deformation tool for welding and heat treatment of a stainless steel cylinder, which comprises a supporting plate frame, a high-temperature-resistant elastic supporting mechanism and a top supporting device, wherein a plurality of supporting sleeves are divergently arranged on the supporting plate frame from the center outwards, the supporting sleeves are connected with the top supporting device through the high-temperature-resistant elastic supporting mechanism, one end of the top supporting device, which is far away from the high-temperature-resistant elastic supporting mechanism, is used for abutting against the inner side wall of the stainless steel cylinder, the top supporting device and the high-temperature-resistant elastic supporting mechanism are also detachably connected through a fastening piece, the length of the top supporting device is adjustable, and the top supporting device and the supporting plate frame. The deformation-preventing tool for welding and heat treatment of the stainless steel cylinder provided by the invention can solve the problem that the deformation is different and the stainless steel cylinder cannot be supported due to the fact that the deformation amount of the deformation-preventing tool is different from that of the stainless steel cylinder.
Description
Technical Field
The invention relates to the technical field of equipment manufacturing and installation, in particular to an anti-deformation method for welding and heat treatment of a stainless steel cylinder and a tool thereof.
Background
With the improvement of equipment manufacturing level and industrial design level in China, the application of super-huge non-standard pressure equipment is more and more extensive, and especially in the fields of aerodynamics, environmental protection, large-scale deep submergence vehicles and the like, a batch of test devices with complex media and working conditions are designed and built. Part of the test device is applied to the ultralow temperature (-196 ℃) pressure reciprocating alternating working condition.
The large nonstandard pressure equipment under the complex working condition has complex structure and special material. For example, low-temperature wind tunnel equipment for aerodynamic research is made of 304L stainless steel materials, and in order to ensure the operation safety of the equipment, the pressure-bearing shell is subjected to heat treatment to eliminate the structure and welding residual stress.
The barrel needs to use a large amount of anti-deformation tools in the manufacturing process, if 304L materials made of the same material are used, the cost is huge, if high-temperature-resistant paint is coated on the outer surface of a carbon steel material to serve as the anti-deformation tool, the anti-deformation tool has obvious cost advantage, but due to the fact that the thermal expansion coefficients of the carbon steel material and the high-temperature-resistant paint are different (the 304L stainless steel is 18.58, and the carbon steel is 14.42), the linear expansion amount of the carbon steel material and the linear expansion amount of the carbon steel material are different in the heat.
Disclosure of Invention
The invention mainly aims to provide an anti-deformation method for welding and heat treatment of a stainless steel cylinder and a tool thereof, and aims to solve the problem that the stainless steel cylinder cannot be supported due to different deformation caused by inconsistent material of the anti-deformation tool and the material of the stainless steel cylinder.
In order to achieve the purpose, the invention provides an anti-deformation tool for welding and heat treatment of a stainless steel cylinder, which comprises a supporting plate frame, a high-temperature resistant elastic supporting mechanism and a top supporting device, wherein,
the supporting plate frame is provided with a plurality of supporting sleeves by outwards diverging the center, the supporting sleeves are connected with the top supporting device through a high-temperature-resistant elastic supporting mechanism, one end of the top supporting device, which deviates from the high-temperature-resistant elastic supporting mechanism, is used for being abutted against the inner side wall of the stainless steel barrel, the top supporting device and the high-temperature-resistant elastic supporting mechanism are detachably connected through fasteners, the length of the top supporting device is adjustable, and the top supporting device and the supporting plate frame are made of carbon steel.
Preferably, the supporting sleeve is accommodated with an inner sleeve at a free end thereof, one end of the high temperature resistant elastic supporting mechanism is connected with an inner bottom wall of the inner sleeve, and the other end of the high temperature resistant elastic supporting mechanism is connected with an inner bottom wall of the top supporting device.
Preferably, the high temperature resistant elastic supporting mechanism is a spring, and two ends of the spring are respectively connected with the top supporting device and the inner bottom wall of the inner sleeve.
Preferably, the top supporting device comprises a stay bar, a supporting head and an adjusting nut, and two ends of the adjusting nut are respectively in threaded connection with the stay bar and the supporting head.
Preferably, flanges are arranged on the outer side walls of the supporting sleeve and the stay bar, and a fastener penetrates through mounting holes of the flanges on the supporting sleeve and the stay bar to connect the supporting sleeve and the stay bar.
Preferably, the fastener comprises a stud arranged on the flange in a penetrating way and a nut sleeved on the stud.
Preferably, be provided with in the inside wall of support sleeve and be used for carrying on spacing fixed stop to the inner sleeve, fixed stop's outer diapire and fixed stop looks butt.
Preferably, the plurality of supporting sleeves are uniformly distributed in the circumferential direction of the supporting plate frame, and each supporting sleeve corresponds to a high-temperature-resistant elastic supporting mechanism and a top supporting device.
The invention further provides an anti-deformation method of the anti-deformation tool based on the welding and heat treatment of the stainless steel cylinder, which comprises the following steps of:
installing all parts of an anti-deformation tool for welding and heat treatment of the stainless steel cylinder, and adjusting the relative position between the supporting plate rack and the top supporting device and the length of the top supporting device to enable one end of the top supporting device, which is far away from the supporting plate rack, to be abutted against the inner side wall of the stainless steel cylinder;
welding the stainless steel cylinder, and loosening a fastening piece between the supporting plate frame and the top supporting device after welding is finished, so that the distance between the supporting plate frame and the top supporting device can be adjusted;
and (4) carrying out heat treatment on the stainless steel cylinder, after the heat treatment is finished, screwing the fastener between the supporting plate rack and the top supporting device, and adjusting the length of the top supporting device so as to adjust the roundness of the stainless steel cylinder.
The deformation-preventing tool for welding and heat treatment of the stainless steel cylinder provided by the invention has the following beneficial effects:
(1) the same set of anti-deformation tooling is adopted in the welding and heat treatment processes of the stainless steel cylinder, so that the problem of tooling replacement under different working conditions is solved;
(2 the problem that the deformation-preventing tool falls off from the cylinder body during heat treatment is solved by a method of pre-arranging a high-temperature-resistant spring between the supporting plate frame and the top supporting device to supplement insufficient expansion of the carbon steel;
(3) the length of this frock accessible adjustment top strutting arrangement realizes the application of barrel on the different diameters, has realized energy-concerving and environment-protective.
Drawings
FIG. 1 is a schematic structural view of an anti-deformation tool for welding and heat treatment of a stainless steel cylinder according to the present invention;
FIG. 2 is a schematic structural diagram of a support bracket in the anti-deformation tool for welding and heat treatment of a stainless steel cylinder body, which is hoisted into the stainless steel cylinder body;
FIG. 3 is a schematic structural diagram of a support bracket in the anti-deformation tool for welding and heat treatment of a stainless steel cylinder according to the present invention after a spring is installed;
FIG. 4 is a schematic structural diagram of a support bracket in the anti-deformation tool for welding and heat treatment of a stainless steel cylinder according to the present invention after installation of a stay bar;
FIG. 5 is a schematic structural diagram of a support bracket in the anti-deformation tool for welding and heat treatment of a stainless steel cylinder according to the present invention after a support head is installed;
fig. 6 is a partial structural schematic view of the deformation prevention tool for welding and heat treatment of the stainless steel cylinder according to the present invention.
In the figure, 1-support sleeve, 2-inner sleeve, 3-spring, 4-brace, 5-support head, 6-adjusting nut, 7-nut, 8-double-end stud and 9-base.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides an anti-deformation tool for welding and heat treatment of a stainless steel cylinder.
Referring to fig. 1 to 6, in the preferred embodiment, a deformation prevention tool for welding and heat treatment of a stainless steel cylinder includes a supporting plate frame, a high temperature resistant elastic supporting mechanism (in the embodiment, the high temperature resistant refers to a temperature of 600 ℃ or higher), and a top supporting device, wherein,
the supporting plate frame is provided with a plurality of supporting sleeves 1 by outwards dispersing in the center, the supporting sleeves 1 are connected with the top supporting device through the high-temperature-resistant elastic supporting mechanism to adjust the relative distance between the supporting sleeves 1 and the top supporting device, one end of the top supporting device, which deviates from the high-temperature-resistant elastic supporting mechanism, is used for being abutted to the inner side wall of the stainless steel cylinder body, the top supporting device and the high-temperature-resistant elastic supporting mechanism are detachably connected through fasteners, the length of the top supporting device is adjustable, and the top supporting device and the supporting plate frame are made of carbon steel.
This deformation frock of preapring for an unfavorable turn of events is particularly useful for the stainless steel barrel of major diameter, and wherein big direct cylinder that indicates the diameter is greater than 5000 mm.
Specifically, the inner sleeve 2 is accommodated on the free end of the supporting sleeve 1 (the supporting sleeve 1 is sleeved outside the inner sleeve 2), one end of the high-temperature-resistant elastic supporting mechanism is connected with the inner bottom wall of the inner sleeve 2, and the other end of the high-temperature-resistant elastic supporting mechanism is connected with the inner bottom wall of the top supporting device.
In this embodiment, the high temperature resistant elastic supporting mechanism is a spring 3 (a high temperature resistant spring is adopted), and two ends of the spring 3 are respectively connected with the top supporting device and the inner bottom wall of the inner sleeve 2 (the two ends of the spring may not be fixed, and only directly abut against each other).
The embodiment proposes a specific structure of a top support device: the top supporting device comprises a supporting rod 4, a supporting head 5 and an adjusting nut 6, wherein two ends of the adjusting nut 6 are respectively in threaded connection with the supporting rod 4 and the supporting head 5.
Specifically, flanges are arranged on the outer side walls of the supporting sleeve 1 and the stay bar 4, and fasteners penetrate through mounting holes of the flanges on the supporting sleeve 1 and the stay bar 4 to connect the supporting sleeve 1 and the stay bar 4. In this embodiment, the fastener includes a stud 8 disposed through the flange and a nut 7 disposed on the stud 8.
Be provided with in the inside wall of supporting sleeve 1 and be used for carrying out spacing fixed stop to interior sleeve 2, fixed stop's outer diapire and fixed stop looks butt. The stay bar 4 is also provided with a fixed baffle plate to limit the other end of the inner sleeve 2.
A plurality of supporting sleeves 1 are uniformly distributed in the circumferential direction of the supporting plate rack, and each supporting sleeve 1 corresponds to a high-temperature-resistant elastic supporting mechanism and a top supporting device. The supporting plate frame comprises a base 9 and a plurality of supporting sleeves 1 which are uniformly distributed in the circumferential direction of the base 9. In the present embodiment, six support sleeves 1 are provided as an example.
The working principle of the deformation prevention tool will be described below by taking the welding and thermal treatment deformation prevention for manufacturing a cylinder with a large diameter of phi 5400 as an example. Wherein, the excircle of supporting the plate rail is phi 3360mm, and the length of supporting head 5 is 420mm, and the length of vaulting pole 4 is 700mm, and when this frock was used for the stainless steel barrel of major diameter, only need increase the length of vaulting pole 4 can.
1. After the stainless steel cylinder is assembled, the supporting plate frame is hung on the assembling platform, and the center of the supporting plate frame is coincided with the center of the cylinder, as shown in fig. 2.
2. The inner sleeve 2 and the spring 3 are loaded into the support tray. The inner sleeve 2 is retained by a retaining baffle in the support tray as shown in figure 3.
3. Installing a support rod 4, wherein the support rod 4 is connected with the support sleeve 1 through a flange and a double-end stud 8, inserting the inner sleeve 2 into the support sleeve 1 during installation, and limiting the inner sleeve 2 through a fixed baffle in the support sleeve 1. The high temperature resistant spring 3 is compressed by tightening the nut 7 on the stud 8, as shown in fig. 4.
4. The mounting supports head 5 and adjusting nut 6, through adjusting nut 6, makes the tip that supports head 5 prop on the stainless steel barrel inside wall, adopts adjusting nut 6 to adjust as required, reaches the mesh of preapring for an unfavorable turn of events shape and adjustment barrel circularity, as shown in fig. 5.
5. And after the stainless steel cylinder is assembled and welded and is qualified through nondestructive testing, carrying out heat treatment, wherein in the heat treatment process, the expansion amounts of the two materials are different, for example, phi 5400mm, the expansion of the cylinder section is 28.60mm, and the deformation-preventing support disc frame is about 22.20 mm. Thus, before the heat treatment, the nuts 7 supporting the studs 8 between the dish rack and the stay 4 are loosened so that the gap reserved between the nuts 7 exceeds the difference in expansion of the two by at least more than (28.6 mm-22.2mm =6.4 mm).
6. In the heat treatment process, the material expands along with the temperature rise, and at the moment, the insufficient expansion amount of the carbon steel is compensated by the extension of the preset compression amount through the spring 3, so that the tool is prevented from falling off from the cylinder in the heat treatment process.
7. After the heat treatment is finished, the supporting plate rack is locked with the stud 8 of the flange on the support rod 4 again, and the roundness of the stainless steel cylinder body is adjusted by adjusting the elastic nut 7 again.
The deformation-preventing tool for welding and heat treatment of the stainless steel cylinder provided by the invention has the following beneficial effects:
(1) the same set of anti-deformation tooling is adopted in the welding and heat treatment processes of the stainless steel cylinder, so that the problem of tooling replacement under different working conditions is solved;
(2 the problem that the deformation-preventing tool falls off from the cylinder body during heat treatment is solved by a method of pre-arranging a high-temperature-resistant spring between the supporting plate frame and the top supporting device to supplement insufficient expansion of the carbon steel;
(3) the length of the top supporting device can be adjusted, the stainless steel cylinders with different diameters can be applied, and energy conservation and environmental protection are achieved.
The invention further provides an anti-deformation method of the anti-deformation tool based on the welding and heat treatment of the stainless steel cylinder.
In the preferred embodiment, the deformation preventing method of the deformation preventing tool based on the welding and the heat treatment of the stainless steel cylinder comprises the following steps:
step S10, mounting all parts of the anti-deformation tool for welding and heat treatment of the stainless steel cylinder, and adjusting the relative position between the supporting disk rack and the top supporting device and the length of the top supporting device to enable one end of the top supporting device, which is far away from the supporting disk rack, to be abutted against the inner side wall of the stainless steel cylinder;
step S20, welding the stainless steel cylinder, and loosening the fastening piece between the supporting disk rack and the top supporting device after welding to enable the distance between the supporting disk rack and the top supporting device to be adjustable;
and step S30, carrying out heat treatment on the stainless steel cylinder, after the heat treatment is finished, screwing the fastener between the supporting plate rack and the top supporting device, and adjusting the length of the top supporting device to adjust the roundness of the stainless steel cylinder.
The deformation preventing method for welding and heat treatment of the stainless steel cylinder provided by the invention has the following beneficial effects.
(1) The stainless steel cylinder adopts the same set of anti-deformation tooling during welding and heat treatment processes, and the problem of tooling replacement under different working conditions is solved.
(2 the problem that the deformation-preventing tool falls off the cylinder during heat treatment is solved by a method of pre-arranging a high-temperature-resistant spring between the supporting plate frame and the top supporting device to supplement the insufficient expansion amount of the carbon steel.
(3) Through the length of adjusting top strutting arrangement, realize the application of barrel on different diameters, realized energy-concerving and environment-protective.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are intended to be covered by the scope of the present invention.
Claims (9)
1. An anti-deformation tool for welding and heat treatment of a stainless steel cylinder is characterized by comprising a supporting plate frame, a high-temperature resistant elastic supporting mechanism and a top supporting device, wherein,
the supporting plate frame is provided with a plurality of supporting sleeves by outwards diverging the center, the supporting sleeves are connected with the top supporting device through a high-temperature-resistant elastic supporting mechanism, one end of the top supporting device, which deviates from the high-temperature-resistant elastic supporting mechanism, is used for being abutted against the inner side wall of the stainless steel barrel, the top supporting device and the high-temperature-resistant elastic supporting mechanism are detachably connected through fasteners, the length of the top supporting device is adjustable, and the top supporting device and the supporting plate frame are made of carbon steel.
2. The tool for preventing deformation during welding and heat treatment of the stainless steel cylinder according to claim 1, wherein the inner sleeve is received at the free end of the support sleeve, one end of the high temperature resistant elastic support mechanism is connected with the inner bottom wall of the inner sleeve, and the other end of the high temperature resistant elastic support mechanism is connected with the inner bottom wall of the top support device.
3. An anti-deformation tool for welding and heat treatment of a stainless steel cylinder according to claim 1, wherein the high temperature resistant elastic support mechanism is a spring, and two ends of the spring are respectively connected with the top support device and the inner bottom wall of the inner sleeve.
4. The deformation preventing tool for welding and heat treatment of the stainless steel cylinder according to claim 1, wherein the top supporting device comprises a stay bar, a supporting head and an adjusting nut, and two ends of the adjusting nut are respectively in threaded connection with the stay bar and the supporting head.
5. A deformation preventing tool for welding and heat treatment of a stainless steel cylinder according to claim 4, wherein flanges are arranged on the outer side walls of the supporting sleeve and the stay bar, and a fastener penetrates through mounting holes of the flanges on the supporting sleeve and the stay bar to connect the supporting sleeve and the stay bar.
6. A deformation prevention tool for welding and heat treatment of a stainless steel cylinder according to claim 5, wherein the fastener comprises a stud bolt arranged on the flange in a penetrating mode and a nut sleeved on the stud bolt.
7. An anti-deformation tool for welding and heat treatment of a stainless steel cylinder according to claim 1, wherein a fixed baffle for limiting the inner sleeve is arranged in the inner side wall of the supporting sleeve, and the outer bottom wall of the fixed baffle is abutted against the fixed baffle.
8. A deformation preventing tool for welding and heat treatment of a stainless steel cylinder according to any one of claims 1 to 7, wherein a plurality of supporting sleeves are uniformly distributed in the circumferential direction of the supporting plate rack, and each supporting sleeve corresponds to a high temperature resistant elastic supporting mechanism and a top supporting device.
9. A deformation prevention method for a deformation prevention tool for stainless steel cylinder welding and heat treatment according to any one of claims 1 to 8 is characterized by comprising the following steps:
installing all parts of an anti-deformation tool for welding and heat treatment of the stainless steel cylinder, and adjusting the relative position between the supporting plate rack and the top supporting device and the length of the top supporting device to enable one end of the top supporting device, which is far away from the supporting plate rack, to be abutted against the inner side wall of the stainless steel cylinder;
welding the stainless steel cylinder, and loosening a fastening piece between the supporting plate frame and the top supporting device after welding is finished, so that the distance between the supporting plate frame and the top supporting device can be adjusted;
and (4) carrying out heat treatment on the stainless steel cylinder, after the heat treatment is finished, screwing the fastener between the supporting plate rack and the top supporting device, and adjusting the length of the top supporting device so as to adjust the roundness of the stainless steel cylinder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010058519.0A CN111168318A (en) | 2020-01-19 | 2020-01-19 | Anti-deformation method and tool for welding and heat treatment of stainless steel cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010058519.0A CN111168318A (en) | 2020-01-19 | 2020-01-19 | Anti-deformation method and tool for welding and heat treatment of stainless steel cylinder |
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| CN111168318A true CN111168318A (en) | 2020-05-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112025193A (en) * | 2020-09-07 | 2020-12-04 | 九江海天设备制造有限公司 | Auxiliary tool supporting device for welding low-temperature container |
| CN112247316A (en) * | 2020-09-07 | 2021-01-22 | 江阴市富仁高科股份有限公司 | Welding process of pressure container |
| CN113601052A (en) * | 2021-07-28 | 2021-11-05 | 中国水利水电第六工程局有限公司 | Short pipe fixing tool suitable for automatic welding |
| CN115198064A (en) * | 2022-07-28 | 2022-10-18 | 江苏科技大学 | Large-scale metal ring part elliptical deformation shape correction tool and shape correction method |
| CN117001264A (en) * | 2023-09-25 | 2023-11-07 | 黑龙江省建筑安装集团有限公司 | Tank prefabricated telescopic supporting device |
-
2020
- 2020-01-19 CN CN202010058519.0A patent/CN111168318A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112025193A (en) * | 2020-09-07 | 2020-12-04 | 九江海天设备制造有限公司 | Auxiliary tool supporting device for welding low-temperature container |
| CN112247316A (en) * | 2020-09-07 | 2021-01-22 | 江阴市富仁高科股份有限公司 | Welding process of pressure container |
| CN113601052A (en) * | 2021-07-28 | 2021-11-05 | 中国水利水电第六工程局有限公司 | Short pipe fixing tool suitable for automatic welding |
| CN113601052B (en) * | 2021-07-28 | 2023-03-14 | 中国水利水电第六工程局有限公司 | Short pipe fixing tool suitable for automatic welding |
| CN115198064A (en) * | 2022-07-28 | 2022-10-18 | 江苏科技大学 | Large-scale metal ring part elliptical deformation shape correction tool and shape correction method |
| CN117001264A (en) * | 2023-09-25 | 2023-11-07 | 黑龙江省建筑安装集团有限公司 | Tank prefabricated telescopic supporting device |
| CN117001264B (en) * | 2023-09-25 | 2024-01-30 | 黑龙江省建筑安装集团有限公司 | Tank prefabricated telescopic supporting device |
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