Butt welding process evaluation device

Abstract

The utility model discloses a butt welding process evaluation device which comprises a structural part protection part, a heat preservation cotton plate and a horizontal placing part, the structural part protection part is of a cuboid box body structure with an open upper end, the heat preservation cotton plate is arranged in the structural part protection part, and the horizontal placing part is arranged on the structural part protection part. The two welding materials are horizontally placed on the upper portion of the structural part protection part through the horizontal placing part, a welding groove is formed between the two welding materials, the heat preservation cotton plate is correspondingly arranged under the welding groove, and the structural part protection part is provided with a shielding gas assembly corresponding to the welding groove. According to the utility model, the structure protection part of the box body structure is arranged, two welding materials are horizontally arranged on the structure protection part through the horizontal placing part, and heat preservation or shielding gas protection on the welding position can be realized through the heat preservation cotton plate and the shielding gas assembly based on the actual welding condition, so that the welding device is suitable for different welding process conditions; therefore, various welding processes can be evaluated at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of welding process evaluation, in particular to a process evaluation device for butt welding. Background Art

[0002] In the welding professional sector, large structural parts, hydraulic pipelines and pressure-bearing equipment often need to be manufactured by welding. Especially when designing special equipment, there are many different welding operations such as the same metal connection and dissimilar metal connection in multiple locations on the same large spare part. For example, there are: welding of the same material of parent material cast steel ZG35Cr24Ni7SiN + cast steel ZG35Cr24Ni7SiN; welding of dissimilar materials of parent material cast steel ZG35Cr24Ni7SiN + stainless steel 06Cr25Ni20; welding of dissimilar materials of parent material cast steel ZG35Cr24Ni7SiN + low alloy steel Q355; welding of dissimilar materials of parent material stainless steel 06Cr25Ni20 + low alloy steel Q355; welding of dissimilar materials of parent material low carbon steel Q235 + low alloy steel Q355, etc.

[0003] When the equipment is subjected to the same or different welding processes, a large number of welding equipment and welding materials need to be purchased to meet the welding requirements of various metal joint materials. This occupies a large area, has complicated procedures and high costs. Welding defects are also prone to occur when welding is performed directly, and the welding quality cannot be guaranteed. Generally, process assessments need to be performed separately before welding. However, most of the existing welding process assessment devices cannot meet the assessment of multiple welding processes at the same time.

[0004] In view of the above-mentioned defects, the inventor of the present invention finally obtained the present invention after a long period of research and practice. Utility Model Content

[0005] In order to solve the above-mentioned technical defects, the technical solution adopted by the utility model is to provide a process evaluation device for butt welding, including a structural part protection part, a thermal insulation cotton board and a horizontal placement part, the structural part protection part is arranged as a rectangular box structure with an open upper end, the thermal insulation cotton board is arranged in the structural part protection part, the horizontal placement part is arranged on the structural part protection part, two welding materials are horizontally placed on the upper part of the structural part protection part through the horizontal placement part, a welding groove is formed between the two welding materials, the thermal insulation cotton board is arranged correspondingly below the welding groove, and the structural part protection part is provided with a shielding gas assembly corresponding to the welding groove.

[0006] Preferably, the shielding gas assembly includes a shielding gas inlet hole and a shielding gas delivery pipeline, the shielding gas inlet hole is arranged on the structural member protection portion, the shielding gas inlet hole is arranged corresponding to the bottom of the welding groove, and the shielding gas inlet hole is connected to the shielding gas delivery pipeline.

[0007] Preferably, the structural member protection portion includes a base plate, two first side plates and two second side plates, the two first side plates are arranged in parallel, the two second side plates are arranged in parallel, and the first side plates and the second side plates are vertically fixed to the base plate, and the first side plates and the second side plates are alternately arranged to form a rectangular frame structure.

[0008] Preferably, the height dimension of the first side plate is greater than the height dimension of the second side plate, and the two first side plates are simultaneously arranged on both sides of the two welding materials.

[0009] Preferably, the horizontal placement portion includes two horizontal support plates, the two horizontal support plates are arranged on the same horizontal plane, and the two horizontal support plates are respectively fixed on the two second side plates, the horizontal support plates are correspondingly arranged at the upper ends of the second side plates, and the horizontal support plates on the two second side plates respectively support the two welding materials.

[0010] Preferably, the two welding materials are both configured as flat plate pieces, a single-sided groove is provided on one side of the welding material, and the single-sided grooves of the two welding materials form the welding groove.

[0011] Preferably, the single-sided bevel is set to a 30° inclined bevel, the cross-section of the welding groove is a Y-shaped groove as a whole, and the upper part of the welding groove is a V-shaped groove with an angle of 60° formed by two single-sided bevels.

[0012] Preferably, the size of the welding material is set to 400 mm in length×200 mm in width×25 mm in thickness.

[0013] Compared with the prior art, the beneficial effect of the utility model is that: the utility model arranges the structural protection part of the box structure, and horizontally arranges the two welding materials on the structural protection part through the horizontal placement part, and based on the actual welding situation, the insulation cotton board and the protective gas component can be used to achieve insulation or protective gas protection at the welding position, so as to be suitable for different welding process conditions, thereby being able to evaluate multiple welding processes at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural stereoscopic view of the process evaluation device for butt welding;

[0015] Figure 2 An exploded view of the structure of the process assessment device for butt welding;

[0016] Figure 3 Schematic diagram of the weld of the butt welding.

[0017] The numbers in the figure represent:

[0018] 1-first welding material; 2-second welding material; 3-weld; 4-single-side groove; 5-structural component protection part; 6-shielding gas inlet hole; 7-shielding gas delivery pipeline; 8-insulation cotton board; 9-horizontal placement part; 31-bottom layer; 32-first filling layer; 33-second filling layer; 34-covering layer. DETAILED DESCRIPTION

[0019] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0020] Embodiment 1

[0021] like Figure 1 , Figure 2 As shown, Figure 1 A structural stereoscopic view of the process evaluation device for butt welding; Figure 2 This is an exploded view of the structure of the process assessment device for butt welding.

[0022] The process evaluation device for butt welding of the utility model comprises a structural member protection part 5, a thermal insulation cotton board 8 and a horizontal placement part 9, the structural member protection part 5 is arranged as a rectangular box structure with an open upper end, the thermal insulation cotton board is arranged in the structural member protection part 5, the horizontal placement part is arranged on the structural member protection part 5, two welding materials are horizontally placed on the upper part of the structural member protection part 5 through the horizontal placement part, a welding groove is formed between the two welding materials, the thermal insulation cotton board 8 is arranged correspondingly below the welding groove, and the structural member protection part 5 is provided with a shielding gas assembly corresponding to the welding groove.

[0023] It is worth pointing out that the two welding materials are respectively a first welding material 1 and a second welding material 2. The first welding material 1 and the second welding material 2 can be cast iron, stainless steel, low carbon steel and low alloy steel, generally butt welding of cast iron and cast iron, butt welding of cast iron and stainless steel, butt welding of cast iron and low alloy steel, butt welding of stainless steel and low alloy steel, and butt welding of low carbon steel and low alloy steel.

[0024] Preferably, the shielding gas assembly includes a shielding gas inlet hole 6 and a shielding gas delivery pipe 7, the shielding gas inlet hole 6 is arranged on the structural part protection portion 5, the shielding gas inlet hole 6 is arranged corresponding to the bottom of the welding groove, the shielding gas inlet hole 6 is connected to the shielding gas delivery pipe 7, and is used to introduce welding shielding gas into the structural part protection portion 5 to protect the back side of the weld 3 at the welding groove.

[0025] Specifically, the structural member protection portion 5 includes a bottom plate, two first side plates and two second side plates, the two first side plates are arranged in parallel, the two second side plates are arranged in parallel, and the first side plates and the second side plates are both vertically fixed on the bottom plate, the first side plates and the second side plates are alternately arranged to form a rectangular frame structure, and the structure of the structural member protection portion can enable the structural member protection portion 5 to form a sealing structure with only an upper end opening, so that while the welding position is insulated by the thermal insulation cotton board, the protective gas can also be guaranteed to provide gas protection to the welding position.

[0026] Preferably, the height dimension of the first side plate is greater than the height dimension of the second side plate, and the two first side plates are simultaneously arranged on both sides of the two welding materials, so that the two welding materials can be limited in the horizontal direction to further improve the position stability of the two welding materials after alignment.

[0027] The horizontal placement portion 9 includes two horizontal support plates, which are arranged on the same horizontal plane and fixedly arranged on the two second side plates respectively. The horizontal support plates are correspondingly arranged on the upper ends of the second side plates, and the horizontal support plates on the two second side plates respectively support the two welding materials, thereby ensuring the stable alignment of the two welding materials.

[0028] The two welding materials are both arranged as flat plate pieces, and a single-sided groove 4 is arranged on one side of the welding material, and the single-sided grooves 4 of the two welding materials form the welding groove.

[0029] The single-sided groove 4 is generally set to be a 30° inclined groove, the cross-section of the welding groove is a Y-shaped groove as a whole, and the upper part of the welding groove is formed by two single-sided grooves 4 to form a V-shaped groove with an angle of 60°.

[0030] The utility model arranges the structural protection part of the box structure, and horizontally arranges the two welding materials on the structural protection part through the horizontal placement part. Based on the actual welding situation, the insulation cotton board 8 and the protective gas component can be used to achieve insulation or protective gas protection at the welding position to be suitable for different welding process conditions, so that multiple welding processes can be evaluated at the same time.

[0031] Embodiment 2

[0032] In this embodiment, the two welding materials are cast steel (ZG35Cr24Ni7SiN) and stainless steel (06Cr25Ni20).

[0033] The welding material of cast steel (ZG35Cr24Ni7SiN) is machined from 25 mm and has dimensions of 400 mm in length×200 mm in width×25 mm in thickness, and a single-sided groove 4 of 30° is machined on the long side.

[0034] The welding material of stainless steel (06Cr25Ni20) is machined from 25 mm and has dimensions of 400 mm in length × 200 mm in width × 25 mm in thickness, and a single-sided groove 4 of 30° is machined on the long side.

[0035] The two welding materials of cast steel (ZG35Cr24Ni7SiN) and stainless steel (06Cr25Ni20) are paired to form a Y-shaped welding groove, and then the weld 3 is formed by single-sided welding and double-sided forming.

[0036] The structural member protection part 5 is formed by 10mm machining and welding, and the two welding materials are placed horizontally on the horizontal placement part 9. The shielding gas delivery pipeline 7 is formed by φ10mm seamless steel pipe machining and inserted into the shielding gas inlet hole 6, and the delivered argon gas protects the two welding materials to form the weld 3 on the back.

[0037] Connection method: first, the single-sided groove 4 is formed on the two welding materials of cast steel (ZG35Cr24Ni7SiN) and stainless steel (06Cr25Ni20) by mechanical processing, and then the two welding materials are paired, the shielding gas delivery pipe 7 is inserted into the shielding gas inlet hole 6, and the insulation cotton board 8 is placed in the structural component protection part 5, and then the paired welding materials are placed horizontally on the horizontal placement part, and finally the two welding materials are welded to form a weld 3.

[0038] The specific usage is:

[0039] Install the structural protection part 5, insert the protective gas delivery pipe 7 to deliver gas 2 minutes in advance, so that the argon gas inside the structural protection part 5 is filled to facilitate the welding protection of the bottom layer 31 of the welding groove, put the insulation cotton board 8 into the structural protection part 5, and finally put the assembled cast steel (ZG35Cr24Ni7SiN) and stainless steel (06Cr25Ni20) two welding materials horizontally on the horizontal placement part. Clean the single-sided groove 4, preheat the single-sided groove 4 on both sides by 100°~120°, in order to better reduce the local temperature difference stress, improve the internal structure, prevent or reduce the hardened structure, it is necessary to use a temperature measuring gun to verify the temperature on both sides of the weld 3. After the temperature is reached, the bottom layer 31 is welded using Panasonic YC-400TX4 manual argon arc welding and welding rod arc welding combined welding machine, manual tungsten inert gas arc welding linear rod method, high-purity argon purity 9999.9%, welding materials: ERNiCrMo-3 welding wire, argon arc welding wire φ2.5mm. The horizontal angle between the welding wire and the workpiece is 20°~45°, the horizontal angle between the welding gun and the workpiece is 75°~85°, and the welding current is 110A~140A. Figure 3 As shown, Figure 3 It is a schematic diagram of the weld seam of the cast steel and cast steel butt welding; the weld seam 3 is divided into a bottom layer 31, a first filling layer 32, a first filling layer 32 and a cover layer 34 from bottom to top. The bottom layer 31 is single-sided welded and double-sided formed. After the welding is completed, the surface of the weld seam 3 is cleaned to ensure that there are no welding defects and the weld seam 3 is flat, which is convenient for the welding of the filling layer. The filling layer and the cover layer 34 are started using a YD-350FR2 manual carbon dioxide gas shielded welding machine, gas shielded welding wire φ1.2mm, welding material: ERNiCrMo-3 welding wire, keep the interlayer temperature not lower than the preheating temperature, use the crescent-shaped wire feeding method, clean the surface of the weld seam 3 layer by layer, and the welding layer reaches 10 mm must be hammered to further eliminate local welding stress, ensure that there are no welding defects before welding the next layer, the cover layer 34 must be higher than the base material, but not > 3mm, and the two sides of the weld 3 maintain a smooth transition with the base material. After all welding is completed, oxyacetylene is used to continue tracking and heating the weld area at 300° for 2 hours, and then the insulation cotton is wrapped and slowly cooled to room temperature. X-ray flaw detection is carried out according to the non-destructive testing of pressure vessels JB / T4730-2005, and then mechanical properties testing is carried out according to NB / T47016-2011. The test results confirm that the welding performance of cast steel and stainless steel fully meets the requirements and is delivered for use in the formulated welding process.

[0040] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. A butt welding process evaluation device, characterized in that: It includes a structural part protection part, a thermal insulation cotton board and a horizontal placement part. The structural part protection part is arranged as a rectangular box structure with an open upper end. The thermal insulation cotton board is arranged in the structural part protection part. The horizontal placement part is arranged on the structural part protection part. Two welding materials are horizontally placed on the upper part of the structural part protection part through the horizontal placement part. A welding groove is formed between the two welding materials. The thermal insulation cotton board is arranged correspondingly below the welding groove. The structural part protection part is provided with a shielding gas assembly corresponding to the welding groove.

2. The process evaluation device for butt welding according to claim 1, characterized in that: The shielding gas assembly includes a shielding gas inlet hole and a shielding gas delivery pipeline. The shielding gas inlet hole is arranged on the structural member protection portion, the shielding gas inlet hole is arranged corresponding to the bottom of the welding groove, and the shielding gas inlet hole is connected to the shielding gas delivery pipeline.

3. The process evaluation device for butt welding according to claim 2, characterized in that: The structural member protection portion includes a bottom plate, two first side plates and two second side plates, the two first side plates are arranged in parallel, the two second side plates are arranged in parallel, and the first side plates and the second side plates are both vertically fixed to the bottom plate, and the first side plates and the second side plates are alternately arranged to form a rectangular frame structure.

4. The process evaluation device for butt welding as claimed in claim 3, characterized in that: The height dimension of the first side plate is greater than the height dimension of the second side plate, and the two first side plates are simultaneously arranged on both sides of the two welding materials.

5. The process evaluation device for butt welding according to claim 4, characterized in that: The horizontal placement part includes two horizontal support plates, which are arranged on the same horizontal plane and fixedly arranged on the two second side plates respectively. The horizontal support plates are correspondingly arranged on the upper ends of the second side plates, and the horizontal support plates on the two second side plates respectively support the two welding materials.

6. The process evaluation device for butt welding according to claim 2, characterized in that: The two welding materials are both arranged as flat plate pieces, and a single-sided groove is arranged on one side of the welding material, and the single-sided grooves of the two welding materials form the welding groove.

7. The process evaluation device for butt welding according to claim 6, characterized in that: The single-sided bevel is set as a 30° inclined bevel, the cross-section of the welding groove is a Y-shaped groove as a whole, and the upper part of the welding groove is a V-shaped groove with an angle of 60° formed by two single-sided bevels.

8. The process evaluation device for butt welding according to claim 1, characterized in that: The size of the welding material is set to be 400 mm long×200 mm wide×25 mm thick.

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