Crack source weld bead forming tool

Abstract

The utility model relates to the technical field of drop hammer sample manufacturing, in particular to a crack source weld bead forming tool which is used for forming a crack source weld bead on a sample blank and comprises a base, a cover plate and a fixing assembly. The cover plate is provided with a profiling through hole matched with a crack source weld bead to be formed in size. The fixing assembly is arranged on the base and used for pressing and fixing a sample blank to the upper portion of the base through the cover plate. According to the crack source weld bead forming tool, the welding quality and the forming efficiency of the crack source weld bead can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drop hammer specimen production, in particular to a crack source weld bead forming tool. Background Art

[0002] The Nil Ductility Transition Temperature (NDT) of ferritic steel is the highest temperature at which a specimen with tiny cracks is not damaged by plastic deformation. It is the key characteristic temperature for determining the platform under the brittle-ductile transition temperature curve of the material, and is also a dynamic transition temperature indicator widely used in engineering. In order to test this temperature, a special drop hammer impact specimen is required.

[0003] The structure of the specimen is a rectangular plate of a certain size, and its tensile surface retains the original rolled surface of the material. On the tensile surface, a crack source weld of a certain shape and size needs to be welded. The processing and forming of the crack source weld is a key link in the drop hammer impact specimen, because the performance of the weld determines the overall quality of the specimen. If the crack source weld is not processed properly, it may cause the specimen to be scrapped. Therefore, there is an urgent need for a tooling to improve the forming quality of the crack source weld. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a crack source weld bead forming tool that can improve welding quality and forming efficiency.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a crack source weld bead forming tool for forming a crack source weld bead on a sample blank, and the crack source weld bead forming tool comprises:

[0006] Pedestal;

[0007] A cover plate provided with a contoured through hole matching the size of the crack source weld bead to be formed;

[0008] The fixing assembly is arranged on the base and is used for pressing and fixing the sample blank to the upper part of the base through the cover plate.

[0009] In an embodiment of the present invention, the base and / or the cover plate and / or the fixing assembly are made of a copper material different from the material of the welding rod.

[0010] In an embodiment of the utility model, a positioning groove is provided on the base, and the positioning groove is matched with the size of the sample blank.

[0011] In one embodiment of the utility model, a positioning portion is provided on the base;

[0012] The positioning portion is configured such that, when the cover plate and the sample blank are fixed by the fixing assembly, the contoured through hole just encloses a welding area on the sample blank where the crack source weld is predetermined to be welded.

[0013] In an embodiment of the utility model, a cooling module for cooling the crack source weld is provided in the base.

[0014] In one embodiment of the present invention, the cooling module comprises:

[0015] A cooling channel is arranged in the base;

[0016] A water inlet and a water outlet are arranged on the base, and the water inlet and the water outlet are respectively connected to two ends of the cooling channel.

[0017] In one embodiment of the present invention, the fixing assembly comprises:

[0018] A limiting bracket, comprising a top plate and two side plates connected to the top plate, wherein the two side plates are vertically arranged on the base and parallel to each other;

[0019] The fastening element is arranged on the top plate in a direction perpendicular to the base and is threadedly connected with the top plate.

[0020] In an embodiment of the present invention, along a direction perpendicular to the side panels, the distance between the two side panels at least matches the size of the cover panel.

[0021] In one embodiment of the utility model, the crack source weld bead forming tooling also includes a welding robot for welding the crack source weld bead, which is arranged beside the base, and the welding robot is configured to be able to weld the crack source weld bead in a straight line at a uniform speed along the length direction of the contoured through hole.

[0022] In an embodiment of the present invention, the positioning portion is integrally provided with one of the limiting brackets.

[0023] To achieve the above-mentioned purpose and other related purposes, the utility model provides a crack source weld bead forming method, comprising the following steps:

[0024] Providing the crack source weld bead forming tooling;

[0025] Placing the sample on the base, aligning the contoured through hole with a predetermined welding area of ​​the crack source weld to be formed on the sample;

[0026] Fix the sample blank and the cover plate with a fixing assembly;

[0027] A welding robot is used to continuously build up a crack source weld bead of a predetermined height in a straight line direction on the sample blank within the enclosed area of ​​the profiling through hole at one time.

[0028] In summary, the utility model realizes the precise formation of crack source welds at preset positions or areas on the sample by designing special contoured through holes on the cover plate, thereby significantly reducing errors in the welding process, ensuring the accuracy and consistency of the welding process, and reducing or avoiding test errors caused by differences in welding quality of each sample; by precisely controlling the forming of the crack source welds, the probability of welding defects is significantly reduced; by setting a fixed component, it is ensured that the sample can be pressed evenly on the base, effectively reducing welding stress and deformation, further improving welding quality, and thereby improving the test success rate of ferritic steel drop hammer impact specimens; and precise crack source weld forming reduces the generation of scrap due to poor welding, saving material costs. At the same time, the tooling provides a unified standard for welding operations, contributes to the standardized management of the welding process, and improves welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of a sample blank assembled in a crack source weld bead forming tooling according to an embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the cover structure of an embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of the sample structure of an embodiment of the utility model;

[0033] Figure 4 This is a schematic diagram of the connection between the base and the fixing assembly according to an embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the cooling module structure in the base according to an embodiment of the utility model;

[0035] Description of component numbers: sample 101, crack source weld 102, base 1, positioning groove 11, positioning portion 12, cover plate 2, contoured through hole 21, fixing assembly 3, limiting bracket 31, top plate 311, side plate 312, fastening element 32, cooling module 4, cooling channel 41, water inlet 42, water outlet 43. DETAILED DESCRIPTION

[0036] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0037] See also Figures 1 to 5 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0038] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of those skilled in the art and the description of the present invention, and any prior art methods, equipment and materials similar or equivalent to the methods, equipment and materials in the embodiments of the present invention can also be used to implement the present invention.

[0039] In the drop hammer test of the non-plastic transition temperature of ferritic steel, ferritic steel refers to all α-Fe steels, including martensite, pearlite, bainite and all non-austenitic steels, etc. The specific principle is to apply a single impact load to each sample in a group of samples of a given material at a series of selected temperatures, and measure the highest temperature when the sample breaks. The cutting direction of the sample blank 101 is generally horizontal, and the sample blank 101 of the drop hammer sample should be taken from the vicinity of other mechanical property samples. For example, the drop hammer sample blank 101 of forgings and castings should be cut from the main body of the forging or casting or the lengthened or enlarged part of the main body. When the size of the forging or casting cannot meet the continuous cutting requirements, intermittent sampling can be performed at other parts of the same product size. The plate sample 101 should retain an original rolled surface as the tensile surface of the cladding crack source weld 102 during the test, and the crack source weld 102 is located in the middle of the original surface (tensile surface) of the sample; the notch processing of the crack source weld 102 should ensure that the cutting tool does not damage the metal surface of the sample 101 under the weld, and the cutting tool can be a mechanical saw, a manual saw, a milling cutter, a thin grinding wheel or other convenient cutting tools, or it can be processed by an electric spark machining machine; the processed notch bottom surface should be parallel to the tensile surface of the sample and perpendicular to the side of the sample.

[0040] See also Figure 1 to Figure 2 The utility model provides a crack source weld bead forming tool, which is used to form a crack source weld bead 102 on a sample blank 101. The crack source weld bead forming tool comprises a base 1, a cover plate 2 and a fixing assembly 3. The cover plate 2 is provided with a contoured through hole 21 matching the size of the crack source weld bead 102 to be formed;

[0041] The fixing assembly 3 is disposed on the base 1 and is used to press and fix the sample 101 to the upper part of the base 1 through the cover plate 2 .

[0042] It should be noted that the upper surface of the base 1 is a plane, which is used to place the sample 101 and the cover plate 2. The contoured through hole 21 provided on the cover plate 2 is matched with the size of the crack source weld 102 to be welded. Specifically, the contoured through hole 21 matches the length, width and height of the crack source weld 102 to be formed, so that the size of the formed crack source weld 102 tends to be standard, thereby improving the processing quality of the sample, and further improving the test success rate of the ferritic steel drop hammer impact sample. The fixing component 3 is arranged on the base 1, and is used for pressing the sample 101 onto the upper part of the base 1 through the cover plate 2. The cover plate 2 can be in a separated state from the fixing component 3, or in a connected state with the fixing component 3, and the specific selection is made according to the specific structure of the fixing component 3. For example, the fixing component 3 includes a pressing part. When the pressing part approaches and squeezes the cover plate 2 in a non-rotating manner, the cover plate 2 can be fixedly connected to or separated from the pressing part. When the pressing part approaches the cover plate 2 in a rotating direction, the pressing part can be rotationally connected to or separated from the cover plate 2. The crack source weld 102 is generally formed by surfacing, and the surfacing material for forming the crack source weld 102 can be nickel-based alloys, stainless steel, alloy steel, carbon steel and other materials; these materials have significant differences from copper materials in terms of melting point, thermal conductivity, chemical properties, etc., and therefore will not mix and condense during normal surfacing; this is because the physical and chemical properties of nickel-based alloys, stainless steel, alloy steel and carbon steel are different from those of brass, and their performances during the welding process are also different.

[0043] In the present case, by designing a special contoured through hole 21 on the cover plate 2, the crack source weld 102 is accurately formed at a preset position or area on the sample 101, thereby significantly reducing the error in the welding process and ensuring the accuracy and consistency of the welding process; by accurately controlling the forming of the crack source weld 102, the probability of welding defects is significantly reduced; by setting the fixing component 3, it is ensured that the sample 101 can be pressed evenly on the base 1, effectively reducing the welding stress and deformation, further improving the welding quality, and thereby improving the test success rate of the ferritic steel drop hammer impact specimen; and the precise weld bead forming reduces the generation of scrap due to poor welding and saves material costs. At the same time, the tooling provides a unified standard for welding operations, which is conducive to the standardized management of the welding process.

[0044] As an optional embodiment of the present case, the base 1 and / or the cover plate 2 and / or the fixing assembly 3 are made of a copper material different from the material of the welding rod.

[0045] It should be noted that the copper material can be brass or red copper. Brass is an alloy of copper and zinc with excellent thermal conductivity, while red copper has a melting point of 1083°C and a relative density of 8.9. It is a tough, soft, and ductile purple-red metal. These copper materials all have excellent thermal conductivity. Therefore, during the surfacing process, when the contoured through hole 21 with a copper material as the inner wall is used to enclose the area where the crack source weld 102 is formed, the copper material can quickly absorb and conduct the heat generated by welding, thereby reducing the thermal impact of the surfacing area; at the same time, since the copper material and the surfacing material are made of different materials, the crack source weld 102 can be prevented from sticking to the cover plate 2, which facilitates disassembly and improves ease of use.

[0046] See also Figure 4 As an optional embodiment of the present case, a positioning groove 11 is provided on the base 1 , and the positioning groove 11 is matched with the size of the sample 101 .

[0047] It should be noted that the length, width and height of the positioning groove 11 are the same as and match the length, width and height of the sample blank 101 of the test specimen; by setting the positioning groove 11 matching the size of the sample blank 101 on the base 1, the position of the sample blank 101 during the welding process can be ensured to be accurate and avoid position offset or misalignment; when the operator positions the sample blank 101, he only needs to align the sample blank 101 and put it into the positioning groove 11, and the positioning of the sample blank 101 can be completed quickly and accurately, which simplifies the operation process, improves work efficiency, and reduces the trouble of manual positioning required by the operator during the welding process and the influence of human operation errors. At the same time, the accuracy of the position of the sample blank 101 helps to achieve the precise forming of the crack source weld 102, thereby reducing the possibility of welding defects and improving welding quality.

[0048] See also Figure 4 , as an optional embodiment of the present case, a positioning portion 12 is provided on the base 1;

[0049] The positioning portion 12 is configured such that when the cover plate 2 and the sample blank 101 are fixed by the fixing assembly 3 , the contoured through hole 21 just encloses the welding area of ​​the predetermined welding crack source weld bead 102 on the sample blank 101 .

[0050] It should be noted that, for example, the positioning portion 12 is disposed at one end of the fixing assembly 3, and is used to position the cover plate 2 or the cover plate 2 and the sample 101, so that the contoured through hole 21 just encloses the welding area of ​​the predetermined welding crack source weld 102 on the sample 101, thereby improving the molding quality of the crack source weld 102, while reducing the difficulty of aligning the position of the cover plate 2 and the sample 101 during assembly, reducing manual operation errors, and improving assembly efficiency. Figure 4As described, the positioning portion 12 in the figure is integrally formed with the limiting bracket 31. It should be understood that the positioning portion 12 only needs to be fixed at a predetermined position on the base 1. As to whether it is integrally formed with the limiting bracket 31, it can be selected according to actual needs.

[0051] See also Figure 4 As an optional embodiment of the present case, the positioning portion 12 is integrally provided with one of the limiting brackets 31 .

[0052] It should be noted that when the positioning portion 12 and the limiting bracket 31 are integrally formed, the positioning portion 12 can be exempted from assembly after the limiting bracket 31 is fixed, which can improve assembly efficiency. Generally, the limiting bracket 31 and the base 1 can be connected by welding or by a detachable connection such as a screw.

[0053] See also Figure 5 As an optional embodiment of the present case, a cooling module 4 for cooling the crack source weld 102 is provided in the base 1 .

[0054] It should be noted that the cooling module 4 can be water-cooled or air-cooled, for example, a cooling channel 41 for cooling the crack source weld 102 is opened in the base 1; for example, the formed crack source weld 102 is air-cooled by cooling gas; the welding area can also be preheated before welding to reduce the temperature gradient and thermal stress during the welding process, thereby improving the welding quality of the crack source weld 102.

[0055] See also Figure 5 As an optional embodiment of the present invention, the cooling module 4 includes a cooling channel 41, a water inlet 42 and a water outlet 43;

[0056] The cooling channel 41 is disposed in the base 1;

[0057] The water inlet 42 and the water outlet 43 are disposed on the base 1 , and the water inlet 42 and the water outlet 43 are communicated with two ends of the cooling channel 41 , respectively.

[0058] It should be noted that the coolant is introduced into the cooling channel 41 in the base 1 through the water inlet 42. The coolant can be water or cooling oil, so as to cool the sample on the upper surface of the base 1 and ensure uniform temperature during welding, thereby ensuring the welding quality of the crack source weld 102; the cooling channel 41 can be U-shaped or S-shaped or other shapes that meet the use requirements, as long as the predetermined cooling effect can be achieved.

[0059] See also Figure 1 and 4As an optional embodiment of the present case, the fixing assembly 3 includes a limiting bracket 31 and a fastening element 32; the limiting bracket 31 includes a top plate 311 and two side plates 312 connected to the top plate 311, and the two side plates 312 are vertically arranged on the base 1 and parallel to each other;

[0060] The fastening element 32 is disposed on the top plate 311 along a direction perpendicular to the base 1 and is threadedly connected to the top plate 311 .

[0061] It should be noted that the limit bracket 31 is fixedly connected to the base 1, the top plate 311 is arranged parallel to the surface of the base 1, the side plate 312 is arranged perpendicular to the surface of the base 1, and the two side plates 312 are arranged in parallel. The minimum height of the two side plates 312 needs to ensure that the sample 101 welded with the crack source weld 102 can be smoothly removed from the crack source weld forming tooling. The fastening element 32 can be a bolt or a threaded rod. The top plate 311 is provided with a threaded hole. The fastening element 32 is matched with the threaded hole. The fastening element 32 is tightened to fix the cover plate 2 and the sample 101. Generally, the fixing assembly 3 is provided with at least two groups. Generally, one fastening element 32 can be provided on each top plate 311, or two or more fastening elements 32 can be provided, as long as the top plate 311 can be evenly compressed. The two fixing components 3 are used to fix the two ends of the cover plate 2 respectively, so that the cover plate 2 can evenly press the sample 101. It should be understood that the two sets of fixing components 3 can be made into a whole.

[0062] When assembling the cover plate 2, one end of the cover plate 2 passes through the area enclosed by the top plate 311 and the two side plates 312 of one of the limiting brackets 31, and the end of the cover plate 2 is abutted against the positioning portion 12 of the other fixing component 3 to achieve assembly positioning.

[0063] When the base 1 is provided with a positioning groove 11, the minimum spacing between the two fixing components 3 is greater than or equal to the length dimension or the width dimension of the positioning groove 11. In this case, the two fixing components 3 are arranged at the two ends in the length direction of the positioning groove 11. When the sample 101 is assembled, generally, it can be directly placed from between the two fixing components 3 into the positioning groove 11 on the base 1; when the base 1 is not provided with a positioning groove 11, the sample 101 is also located between the cover plate 2 and the base 1, and the assembly method of the sample 101 is the same as the method of assembling the cover plate 2.

[0064] See also Figure 1 As an optional embodiment of the present case, along the direction perpendicular to the side panels 312 , the distance between the two side panels 312 is at least adapted to the size of the cover panel 2 .

[0065] It should be noted that the spacing between the two side plates 312 at least matches the size of the cover plate 2, and can also match the size of the cover plate 2 and the sample 101 at the same time. Generally, when the positioning groove 11 is not provided, the spacing between the two side plates 312 needs to match the size of the sample 101. Generally, the spacing between the two side plates 312 can be selected to match the width size of the cover plate 2. By matching the size of the cover plate 2 with the spacing size of the two side plates 312, the two side plates 312 can limit the position of the cover plate 2 in the direction perpendicular to the side plates 312, which improves the stability of the position of the cover plate 2 and is not easy to move; on the other hand, it can also facilitate the relative fixation of the position of the cover plate 2 and the sample 101, avoiding the misalignment of the profiling through hole 21 on the cover plate 2 and the center position of the sample 101, that is, avoiding the misalignment of the profiling through hole 21 on the cover plate 2 and the predetermined crack source weld 102 on the sample 101, thereby improving the accuracy of the forming position of the crack source weld 102.

[0066] As an optional embodiment of the present case, the crack source weld bead forming tooling also includes a welding robot for welding the crack source weld bead 102, which is arranged beside the base 1, and the welding robot is configured to be able to uniformly weld the crack source weld bead 102 in a straight line along the length direction of the contoured through hole 21. When the welding robot is debugged, the crack source weld bead 102 is welded by the welding robot, so that the accuracy and repeatability of the welding operation can be improved, and by ensuring the consistency of the welding quality of the crack source weld bead 102 of each sample, the test error caused by the difference in welding quality can be reduced or prevented.

[0067] The utility model also provides a crack source weld bead forming method, comprising the following steps:

[0068] Providing the above-mentioned crack source weld bead forming tool;

[0069] Place the sample 101 on the base 1, and align the contoured through hole 21 with the predetermined position of the crack source weld 102 to be formed on the sample 101;

[0070] Fix the sample 101 and the cover plate 2 with a fixing assembly 3;

[0071] A welding robot is used to continuously build up a crack source weld bead 102 of a predetermined height in a straight line direction on the sample blank 101 within the enclosed area of ​​the profiling through hole 21 at one time.

[0072] Furthermore, the method step of placing the sample 101 on the base 1 and aligning the contoured through hole 21 with the predetermined position of the crack source weld bead 102 to be formed on the sample 101 also includes the following steps:

[0073] Clean the surface of the sample 101, and preheat the welding area and welding rod of the sample 101 to a predetermined temperature;

[0074] Furthermore, the method of using a welding robot to continuously build up a crack source weld bead 102 of a predetermined height in a straight line direction on the sample blank 101 within the enclosed area of ​​the profiling through hole 21 at one time also includes the following steps:

[0075] Debugging the welding robot, at least including adjusting the welding current and / or welding speed and / or welding gun travel path of the welding robot according to preset parameters;

[0076] When the welding robot's welding gun is welding the sample 101 , the cooling module 4 is used to continuously dissipate heat from the sample 101 .

[0077] The specific steps of the crack source weld bead forming method are as follows:

[0078] S1, pre-treatment sample 101:

[0079] Clean the surface of the sample 101: Use anhydrous ethanol to wipe the area to be welded of the sample 101 to remove possible impurities and oil stains to ensure the cleanliness of the welding area of ​​the sample 101;

[0080] Preheating treatment: preheat the welding area and welding rod of the sample 101 to 100-200°C, such as 100°C, 150°C or 200°C, and keep it warm for a preset time, such as 30 minutes, to prevent defects such as pores or cracks from being generated during the welding process.

[0081] S2, set the crack source weld bead forming tooling:

[0082] Placing the sample 101: placing the pre-treated sample 101 on the base 1 of the crack source weld bead forming tooling, and covering the cover plate 2 on the sample 101;

[0083] Positioning the profiling through hole 21: ensuring that the profiling through hole 21 on the cover plate 2 is exactly located at the center of the sample blank 101 and surrounds the predetermined position or welding area of ​​the crack source weld 102 to be welded;

[0084] Fixing the sample 101: Use the fixing assembly 3 to fix the cover plate 2 and the sample 101 on the base 1 to ensure that the sample 101 and the cover plate 2 will not be displaced during the surfacing process.

[0085] S2, welding process:

[0086] Heat dissipation setting: A cooling module 4 is set on the base 1, so that cooling water enters from the water inlet 42 and is discharged from the water outlet 43, so as to continuously and evenly dissipate heat for the sample 101.

[0087] Set welding parameters: select suitable welding robot and welding gun, set welding current to 180-200 amperes, such as 180A or 190 or 200A, use medium arc length, electrode diameter of 4-5 mm, and material of ordinary low alloy steel cladding electrode.

[0088] Calculate welding speed: According to the required height of the crack source weld bead 102, calculate the moving speed V of the welding rod to ensure that the required weld bead height is achieved.

[0089] Perform welding: The welding gun of the welding robot starts welding from one end of the contoured through hole 21 and moves in a straight line to the other end at a constant speed V; the welding process must be carried out continuously without interruption to ensure that the crack source weld 102 is formed in one go.

[0090] Completion of welding: When the welding gun reaches the end of the profiled through hole 21, welding is completed and the welding gun is automatically withdrawn.

[0091] The above steps ensure the standardization and repeatability of welding operations, thereby improving welding quality and efficiency.

[0092] In summary, the utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance.

[0093] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A crack source weld bead forming tool, characterized in that: Used for forming a crack source weld on a sample, the crack source weld forming tool comprises: Pedestal; A cover plate provided with a contoured through hole matching the size of the crack source weld bead to be formed; The fixing assembly is arranged on the base and is used for pressing and fixing the sample blank to the upper part of the base through the cover plate.

2. The crack source weld bead forming tool according to claim 1, characterized in that: The base and / or the cover plate and / or the fixing assembly are made of a copper material different from the material of the welding rod.

3. The crack source weld bead forming tool according to claim 1, characterized in that: The base is provided with a positioning groove, and the positioning groove is matched with the size of the sample blank.

4. The crack source weld bead forming tool according to claim 1, characterized in that: A positioning portion is provided on the base; The positioning portion is configured such that, when the cover plate and the sample blank are fixed by the fixing assembly, the contoured through hole just encloses a welding area on the sample blank where the crack source weld is predetermined to be welded.

5. The crack source weld bead forming tool according to claim 1, characterized in that: A cooling module for cooling the crack source weld is arranged in the base.

6. The crack source weld bead forming tool according to claim 5, characterized in that: The cooling module comprises: A cooling channel is arranged in the base; A water inlet and a water outlet are arranged on the base, and the water inlet and the water outlet are respectively connected to two ends of the cooling channel.

7. The crack source weld bead forming tool according to claim 1, characterized in that: The fixing assembly comprises: A limiting bracket, comprising a top plate and two side plates connected to the top plate, wherein the two side plates are vertically arranged on the base and parallel to each other; The fastening element is arranged on the top plate in a direction perpendicular to the base and is threadedly connected with the top plate.

8. The crack source weld bead forming tool according to claim 7, characterized in that: Along a direction perpendicular to the side plates, the distance between the two side plates is at least adapted to the size of the cover plate.

9. The crack source weld bead forming tool according to claim 7, characterized in that: The positioning portion is integrally arranged with one of the limiting brackets.

10. The crack source weld bead forming tool according to claim 1, characterized in that: It also includes a welding robot for welding the crack source weld, which is arranged beside the base, and the welding robot is configured to be able to weld the crack source weld in a straight line at a uniform speed along the length direction of the contoured through hole.

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