Welding defect test piece for teaching

Abstract

A welding defect test piece for teaching comprises a welding defect test block and a welding defect slice, the welding defect test block is made of high-quality carbon steel, a groove of the welding defect test block is in a V shape or an X shape, the welding defect test block is connected in a welding mode, and a welding defect is arranged in a welding bead of the welding defect test piece. Four typical welding defects including air holes, slag inclusion, incomplete fusion and incomplete penetration are adopted for welding defects according to preset requirements, two welding defect test blocks are arranged during machining, the two defect types and sizes are the same, one test block serves as the welding defect test block and is used for nondestructive testing of a beginner, and the other test block is used for manufacturing a welding defect slice; the welding defect test block has the beneficial effects that the light welding defect test block and the welding defect slice are combined for use, so that a beginner can conveniently take and use the welding defect test block and the welding defect slice, the welding defect can be easily detected, the learning enthusiasm is improved, and the beginner can clearly see the welding defect through the visual display of the welding defect slice.

Description

Technical Field

[0001] The utility model relates to the technical field of welding non-destructive testing, in particular to a welding defect test block for teaching and a welding defect slice that can be visually inspected. Background Art

[0002] At present, welding has been widely used in industrial sectors such as mechanical manufacturing, transportation, petrochemical industry, and national defense construction. Therefore, the training of non-destructive testing personnel for welds that can be detected is crucial. Usually, the training of non-destructive testing personnel for welds that can be detected is carried out using larger welding test plates for teaching. For the shape of defects, only the photos in textbooks can be referred to. For beginners, the photos in the books cannot visually show the shape of welding defects, and the actual defect shapes cannot be intuitively understood. Summary of the Invention

[0003] To solve the above problems and overcome the deficiencies of the prior art, the utility model provides a welding test piece that can be flexibly transported and conveniently detected, as well as a slice that can visually show the shape of welding defects, which can help beginners quickly get started. The specific technical solutions for the utility model to solve the above technical problems are as follows:

[0004] The welding defect test piece for teaching includes two parts: a welding defect test block and a welding defect slice.

[0005] The material of the welding defect test block is high-quality carbon steel, and the groove is V-shaped or X-shaped, which is connected by welding. Welding defects are provided inside the weld bead of the welding defect test piece. According to preset requirements, the welding defects adopt four typical welding defects: pores, slag inclusions, lack of fusion, and lack of penetration. When the welding defect test block is processed, it is set to be two pieces, with the same defect type and size for both pieces. One piece is used as the welding defect test block for beginners' non-destructive testing, and the other piece is used for the production of welding defect slices.

[0006] The welding defect slice is composed of two parts: a plexiglass disc and a defect weld grinding slice. The defect weld grinding slice is obtained by cutting the welding defect test piece. The cutting adopts wire cutting. Specifically, at the buried welding defect of the welding defect test piece, a welding test block slice is cut along the cross-section. After cutting, both sides are ground, and a corrosion solution is applied to the ground surface. Through acid corrosion, the weld fusion line, weld bead structure, and the shape of welding defects can be revealed, and the defect weld grinding slice is prepared.

[0007] The shape of the plexiglass disc is circular, with a counterbore in the center. The size and shape of the counterbore are the same as those of the defect weld grinding slice, which is used for the fixation and inlay of the defect weld grinding slice. Finally, the surface is ground to make it translucent for easy observation.

[0008] The beneficial effects of the present utility model are that the combined use of a lightweight welding defect test block and a welding defect slice enables beginners to easily access and detect welding defects, thereby enhancing their learning enthusiasm. The intuitive display of the welding defect slice allows beginners to clearly understand welding defects at a glance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 is a schematic structural diagram of the welding defect test piece of the present utility model;

[0010] Attached Figure 2 is a schematic structural diagram of the slice of the present utility model; In the drawings:

[0011] 1. Welding defect test block, 2. Welding defect, 3. Plexiglass disc, 4. Welding defect slice. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] To make the purpose, technical solutions and advantages of the implementation of the present utility model clearer, the present utility model will be described in more detail below in conjunction with the attached Figure 1 and attached Figure 2 drawings of the present utility model.

[0013] In the description of the present utility model, it should be understood that the description of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present utility model.

[0014] The welding defect test piece for teaching purposes includes a welding defect test block 1 and a welding defect slice 4.

[0015] The welding defect test block 1 is made of high-quality carbon steel. A standard weld is provided throughout the middle of the welding defect test block 1. The groove of the weld is of V-type or X-type and is connected by welding. Welding defects 2 are provided inside the weld of the welding defect test block 1. The welding defects 2 are a combination of one or more of the four typical welding defects of porosity, slag inclusion, lack of fusion and lack of penetration according to preset requirements. When the welding defect test block 1 is processed, it is set to two pieces, with the same defect type and size. One piece is used as the welding defect test block 1 for non-destructive testing; the other piece is made into a welding defect slice 4 for directly observing the morphology of the welding defect.

[0016] The welding defect slice 4 includes two parts: a plexiglass disc 3 and a ground slice of the defective weld.

[0017] The material of the plexiglass disc 3 is plexiglass, and its shape is circular. A counterbore with a depth of 2 mm is provided at the center. The size and shape of the counterbore are the same as those of the defective weld grinding piece, and the defective weld grinding piece can be inlaid in the counterbore. The gap is filled with transparent glass glue to fix the defective weld grinding piece. Finally, the upper surface is ground to make it flat, and its surface is bright, which is both beautiful and convenient for observation.

[0018] The welding defect slice 4 has the same material as the welding defect test block 1, with a thickness of 2 mm. The two sides are semi-circular and the upper and lower sides are straight lines. It is obtained by wire cutting the welding defect test block 1. Specifically, at the buried welding defect of one of the welding defect test blocks 1, a defective weld grinding piece is cut out along the cross-section. After cutting, both sides are ground, and the surface roughness reaches 0.8 - 0.4. An etching solution is applied to the ground surface, and through the acid etching method, the weld fusion line, the bead structure, and the shape of the welding defect 2 can be revealed, which is convenient for direct viewing.

[0019] The beneficial effect of the utility model is that the combined use of the lightweight welding test block and the slice is convenient for beginners to use, can easily detect welding defects, improve the learning enthusiasm, and the intuitive display of the slice enables beginners to have a clear understanding of welding defects.

Claims

1. A welding defect test piece for teaching, comprising a welding defect test block (1) and a welding defect slice (4), characterized in that: The material of the welding defect test block (1) is high-quality carbon steel. A standard weld is arranged throughout the middle of the welding defect test block (1). The groove of the weld is V-shaped or X-shaped and connected by welding. A welding defect (2) is arranged inside the weld of the welding defect test block (1). The welding defect (2) adopts one or a combination of two or more of the four typical welding defects of porosity, slag inclusion, lack of fusion and lack of penetration according to preset requirements. The welding defect test block (1) is provided in two pieces during processing. The two pieces have the same welding defect type and size. One piece is used as the welding defect test block (1) for nondestructive testing. The other piece is made into a welding defect slice (4) and embedded in a plexiglass plate (3) for directly observing the morphology of the welding defect.

2. The teaching welding defect test piece according to claim 1, characterized in that: The welding defect slice (4) comprises two parts: an organic glass plate (3) and a defective weld grinding sheet.

3. The teaching welding defect test piece according to claim 1, characterized in that: The material of the organic glass plate (3) is organic glass, and the shape is circular. A 2mm deep sink is arranged in the center. The size and shape of the sink are consistent with the defective weld grinding disc. The defective weld grinding disc can be embedded in the sink. The gap is filled with transparent glass glue to fix the defective weld grinding disc.

4. The teaching welding defect test piece according to claim 1, characterized in that: The welding defect slice (4) is made of the same material as the welding defect test block (1), has a thickness of 2 mm, has semicircular shapes on both sides, and is straight above and below. It is obtained by cutting the welding defect test block (1) by wire cutting, specifically, at the buried welding defect of one of the welding defect test blocks (1), a defect weld grinding slice is cut out along the cross section, and the surface roughness is 0.8-0.4.

Images