Thin plate welding positioning fixture suitable for various joints

Abstract

The utility model discloses a thin plate welding positioning fixture suitable for various joints, belongs to the technical field of welding fixtures, and is used for welding thin plates with various joint forms. According to the technical scheme, a bottom plate is a square plate, a long welding groove with a square section is formed in the middle of the bottom plate, positioning holes are formed in the two ends of the bottom plate respectively, positioning columns and springs are placed in the positioning holes, the positioning columns are in sliding fit with the positioning holes, and two fixing bolts are welded to the edges of the two ends of the bottom plate respectively and located on the two sides of the long welding groove respectively. The pressing plate is a rectangular plate, two ends of the pressing plate are respectively provided with two round holes opposite to the fixing bolts of the bottom plate, the middle of the pressing plate is provided with a square groove hole in the length direction, the square groove hole is opposite to the welding long groove of the bottom plate, and the width of the square groove hole is larger than that of the welding long groove. The welding positioning device can meet the welding positioning requirements of butt joint, lap joint and T-shaped joints, meanwhile, reserved gaps can be accurately controlled, sample deformation can be corrected, the stability of the welding process is effectively guaranteed, and the welding seam forming consistency of obtained welding joints is good.

Description

Technical Field

[0001] The utility model relates to a thin plate welding positioning fixture suitable for various joint forms and belongs to the technical field of welding fixtures. Background Art

[0002] During the application of automotive plate products, systematic arc welding process tests are required. This test verifies the weldability while exploring the welding process. The test is often combined with the actual automotive welding structure, including welding tests and inspections of different joint types such as butt joints, lap joints, and T-joints. Currently, a flexible platform is mostly used in conjunction with a spiral clamping device to position the arc welding process test process, and there is still a lack of welding positioning fixtures suitable for different joint types. In addition, on the one hand, the welding process of thin plates below 3mm is particularly sensitive to the reserved gap and plate deformation, and on the other hand, the rigidity of the thin plate is poor, and the heat release during the welding process can easily cause deformation of the specimen. The current welding assembly method is difficult to meet the requirements of stable welding process. The obtained welding joints often have local burn-through or incomplete welding defects, and the consistency of weld formation is poor. It is very necessary to improve the existing welding positioning fixtures. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a thin plate welding positioning fixture suitable for a variety of joints. This positioning fixture can realize the welding positioning of samples with different joint forms, and at the same time can accurately control the reserved gap and correct the deformation of the sample, effectively ensure the stability of the welding process, and obtain good consistency of weld formation of various forms of welding joints.

[0004] The technical solution to solve the above technical problems is:

[0005] A thin plate welding positioning fixture suitable for various joints, comprising a bottom plate, a positioning column, a spring, a fixing bolt, a pressure plate, a nut, and a pad. The bottom plate is a square plate, the area of ​​the bottom plate is larger than the area of ​​two welded thin plates, a welding long groove with a square cross-section is provided in the middle of the bottom plate, the welding long groove is located below the weld bead of the two welded thin plates, positioning holes are provided at both ends of the bottom plate on one side of the welding long groove and at one end of the bottom plate on the other side of the welding long groove, positioning columns and springs are placed in the positioning holes, the springs are located below the positioning columns, the positioning columns and the positioning holes are in sliding fit, and the bottom plate edges at both ends of the welding long grooves are provided with positioning holes. Two fixing bolts are welded respectively, and the two fixing bolts are separated on both sides of the welding long groove. The pressure plate is a rectangular plate, and there are two circular holes at both ends of the pressure plate in the length direction. The positions of the circular holes are opposite to the fixing bolts of the base plate. The circular holes at both ends of the pressure plate are sleeved on the fixing bolts at both ends of the base plate and locked by nuts. There is a square slot hole along the length direction in the middle of the pressure plate, and the square slot hole is opposite to the welding long groove of the base plate. The length of the square slot hole matches the welding long groove, and the width of the square slot hole is larger than the width of the welding long groove. The pad is a rectangular plate, and the thickness of the pad is the same as the thickness of the lap-welded thin plate.

[0006] The above-mentioned thin plate welding positioning fixture is suitable for various joints. The positioning column is a stepped cylinder. The diameter of the upper large diameter section of the positioning column matches the diameter of the positioning hole. A spring is mounted on the lower small diameter section of the positioning column. The outer diameter of the spring matches the diameter of the positioning hole. The stepped surface of the positioning column is pressed on the upper end of the spring. In the natural state of the spring, the length of the positioning column extending out of the bottom plate plane matches the thickness of the two overlapping welded thin plates. After the positioning column compresses the spring, the upper end face of the positioning hole is embedded in the positioning hole and is flush with the bottom plate plane.

[0007] The above-mentioned thin plate welding positioning fixture is suitable for various joints. There are two parallel grooves on one side of the base plate. The T-joint support plate is a rectangular plate. There is a right-angle V-shaped notch on the upper end of the T-joint support plate. One side of the V-shaped notch is provided with a slot on the plate surface at a 45° angle downward. The two T-joint support plates are placed in parallel, and the lower ends of the two T-joint support plates are respectively inserted into the two parallel grooves of the base plate.

[0008] The beneficial effects of the utility model are:

[0009] The positioning column of the utility model can position the welding sample to ensure that the weld of the welding sample is aligned; the pressure plate is pressed on the top of the welding sample, and the welding sample is pressed by fixing bolts and nuts to avoid deformation of the welding sample; the positioning column is installed in the positioning hole of the bottom plate through a spring, and the positioning column can move up and down to adapt to the butt joint or overlap of welding samples of different thicknesses; two T-joint support plates are placed in parallel, and the right-angle notches and slots of the T-joint support plates can spot weld and shape the top plate and side plates of the T-joint welding sample, so that the T-joint welding sample can be welded on the bottom plate.

[0010] The utility model has the advantages of simple structure, convenient use and easy manufacture, and can realize the welding positioning of three different joint samples: butt joint, lap joint and T-joint. At the same time, it can accurately control the reserved gap and correct the deformation of the welding sample, effectively ensuring the stability of the welding process. The weld formation consistency of various welding joints obtained is good, which can meet the welding positioning requirements of the automobile plate arc welding process test process, effectively ensure the welding quality and improve the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure of the base plate;

[0013] Figure 3 yes Figure 2 AA section view;

[0014] Figure 4 It is a butt joint welding specimen;

[0015] Figure 5 It is the lap joint welding specimen and T-joint welding specimen;

[0016] Figure 6 It is a schematic diagram of the assembly of the butt joint welding specimen;

[0017] Figure 7 It is a schematic diagram of welding of butt joint welding specimen;

[0018] Figure 8 It is a schematic diagram of the assembly of the lap joint welding specimen;

[0019] Fig. 9 It is a schematic diagram of welding of lap joint welding specimen;

[0020] Fig.10 yes Fig. 9 BB cross-sectional view;

[0021] Fig.11 It is a schematic diagram of spot welding shaping of T-joint welding specimen;

[0022] Fig.12 It is a schematic diagram of the assembly of the T-joint welding specimen;

[0023] Fig.13 It is a schematic diagram of T-joint welding specimen welding.

[0024] The markings in the figure are as follows: base plate 1, positioning column 2, spring 3, fixing bolt 4, pressure plate 5, nut 6, gasket 7, T-joint support plate 8, welding long groove 9, slot 10, square slot hole 11, positioning hole 12, butt joint welding sample 13, lap joint welding sample / T-joint top plate 14, T-joint side plate 15, positioning circular hole 16, positioning long circular hole 17, butt joint sample weld 18, lap joint sample weld 19, T-joint sample weld 20. DETAILED DESCRIPTION

[0025] The utility model is composed of a bottom plate 1, a positioning column 2, a spring 3, a fixing bolt 4, a pressing plate 5, a nut 6, a pad 7 and a T-joint supporting plate 8.

[0026] Figure 1 , 23 shows that the bottom plate 1 is a square plate, and the area of ​​the bottom plate 1 is larger than the area of ​​the two welded thin plates. There is a welding long groove 9 with a square cross-section in the middle of the bottom plate 1. The welding long groove 9 is located below the weld bead of the two welded thin plates. The welding long groove 9 is used to weld the two welded thin plates. There are positioning holes 12 at both ends of the bottom plate on one side of the welding long groove 9 and at one end of the bottom plate on the other side of the welding long groove 9. The positioning column 2 and the spring 3 are placed in the positioning hole 12. The spring 3 is located below the positioning column 2. The positioning column 2 and the positioning hole 12 are in sliding fit. The positioning column 2 and the spring 3 are used to position the two welded thin plates to prevent the welded thin plates from moving. Two fixing bolts 4 are welded to the edges of the bottom plate 1 at both ends of the welding long groove 9. The two fixing bolts 4 are separated on both sides of the welding long groove 9. The fixing bolts 4 are used to install the pressure plate 5 to press the welded thin plates.

[0027] Figure 1 , 2 3 shows that the pressing plate 5 is a rectangular plate, and there are two circular holes at both ends of the pressing plate 5 in the length direction. The positions of the circular holes are opposite to the fixing bolts 4 of the bottom plate 1. The circular holes at both ends of the pressing plate 5 are sleeved on the fixing bolts 4 at both ends of the bottom plate 1 and locked by nuts 6. There is a square slot hole 11 along the length direction in the middle of the pressing plate 5. The square slot hole 11 is opposite to the welding long slot 9 of the bottom plate 1. The length of the square slot hole 11 matches the welding long slot 9, and the width of the square slot hole 11 is greater than the width of the welding long slot 9. The function of the pressing plate 5 is to press the welding sample, and then start welding the welding sample to prevent the welding sample from deforming during the welding process.

[0028] Figure 1 , 2 It is shown that there are two parallel slots 10 on one side of the bottom plate 1, the T-joint support plate 8 is a rectangular plate, the upper end of the T-joint support plate 8 has a right-angled V-shaped notch, one side of the V-shaped notch is provided with a slot on the plate surface at a 45° angle downward, the two T-joint support plates 8 are placed in parallel, and the lower ends of the two T-joint support plates 8 are respectively inserted into the two parallel slots 10 of the bottom plate 1. The right-angled notch and slot of the T-joint support plate 8 can be spot welded to the T-joint top plate 14 and the T-joint side plate 15, so that the T-joint welding sample can be welded on the bottom plate 1.

[0029] Figure 3It is shown that the positioning column 2 is a stepped cylinder, the diameter of the upper large diameter section of the positioning column 2 matches the diameter of the positioning hole 12, the spring 3 is mounted on the lower small diameter section of the positioning column 2, the outer diameter of the spring 3 matches the diameter of the positioning hole 12, and the stepped surface of the positioning column 2 is pressed on the upper end of the spring 3. The length relationship between the positioning column 2, the spring 3 and the positioning hole 12 is: the upper end of the positioning column 2 in the natural state of the spring 3 can extend out of the plane of the bottom plate 1, and the extended length can be used to position the welding specimens of the two overlapping layers; the positioning column 2 is pressed down, and the positioning column 2 can compress the spring 3 and then be embedded in the positioning hole 12, and the upper end surface of the positioning column 2 is flush with the plane of the bottom plate 1.

[0030] Figure 4 It shows that a slit is cut in the middle of the butt joint welding specimen 13, and a positioning circular hole 16 is provided on one side close to one end of the slit, and its diameter matches the positioning column 2, and a positioning oblong hole 17 is provided on the other side, and its length direction is perpendicular to the slit, and a positioning oblong hole 17 is provided on the same side of the positioning circular hole 16 at the other end of the slit, and its length direction is parallel to the slit.

[0031] Figure 5 It is shown that the top plate 14 of the lap joint welding specimen / T-joint has a positioning circular hole 16 and a positioning oblong hole 17 at both ends close to the edge of the specimen, and the length direction of the positioning oblong hole 17 is parallel to the edge of the specimen.

[0032] Figure 6 , 7 It shows that the positioning circular hole 16 and the positioning oblong hole 17 of the butt joint welding sample 13 are respectively fixed on the base plate 1 through the positioning columns 2 at three corresponding positions, and the slit position of the butt joint welding sample 13 coincides with the position of the welding long groove 9. Then the pressure plate 5 is installed through the fixing bolts 4 and tightened by the nuts 6. The pressure plate 5 presses the butt joint welding sample 13 and welding can be carried out.

[0033] Figure 8 , 9 10 shows that two lap joint welding specimens 14 are matched with backing plates 7 of the same thickness. The positioning circular holes 16 and the positioning oblong holes 17 of the two lap joint welding specimens 14 are respectively fixed on the bottom plate 1 through two positioning columns 2 at corresponding positions on one side of the welding long groove 9, and a positioning column 2 on the other side is pressed into the positioning hole 12. Then the pressure plate 5 is installed through the fixing bolts 4 and tightened by the nuts 6. The pressure plate 5 presses the lap joint welding specimen 14 and welding can be carried out.

[0034] Fig.11 , 1213 shows that first, two T-joint support plates 8 are inserted into the parallel slots 10 corresponding to the bottom plate 1, and the T-joint top plate 14 and the T-joint side plate 15 are respectively placed in the V-shaped notch and slot of the T-joint support plate 8, so that the T-joint top plate 14 and the T-joint side plate 15 are at a right angle, and then spot welded to fix. The fixed T-joint welding sample is removed, and the positioning circular hole 16 and the positioning oblong hole 17 of the T-joint top plate 14 are respectively fixed to the bottom plate 1 through the two positioning columns 2 at the corresponding positions on one side of the welding long groove 9, and a positioning column 2 on the other side is pressed into the positioning hole 12, and then the pressure plate 5 is installed through the fixing bolts 4 and tightened by the nuts 6. The pressure plate 5 presses the T-joint top plate 14, and welding can be carried out.

[0035] An embodiment of the present utility model is as follows:

[0036] The length of the bottom plate 1 is 250 mm, the width is 200 mm, and the thickness is 20 mm. The length of the welding long groove 9 is 160 mm, the width is 5 mm, and the depth is 4 mm. The center of the welding long groove 9 is 80 mm away from the edge of the bottom plate 1.

[0037] The diameter of the positioning hole 12 of the bottom plate 1 is 8 mm, the depth is 12 mm, the center position of the positioning hole 12 is 12 mm from the center line of the welding long groove 9, and the center distance between the two positioning holes 12 on the same side is 150 mm;

[0038] The width of the slot 10 at one end of the bottom plate 1 is 5 mm and the depth is 8 mm;

[0039] The upper diameter of the positioning column 2 is 8 mm, the height is 6 mm, the lower diameter is 4 mm, and the height is 8 mm;

[0040] The spring 3 has a diameter of 7 mm and a length of 12 mm in its natural state;

[0041] The fixing bolt 4 is of M16 specification, 40 mm high, with the center 25 mm away from the center of the welding long groove 9 and 30 mm away from the edge of the adjacent end;

[0042] The length of the pressing plate 5 is 220 mm, the width is 80 mm, and the thickness is 6 mm. The length of the square slot hole 11 is 170 mm, the width is 20 mm, and there are four round holes with a diameter of 16 mm at the positions corresponding to the fixing bolts 4;

[0043] The length of the butt joint welding sample 13 is 240 mm, the width is 160 mm, the middle slit is 150 mm long, the width is 0.4 mm, the diameter of the positioning circular hole 16 is 8 mm, the length of the positioning oblong hole 17 is 16 mm, the width is 8 mm, and its position matches the position of the positioning column 2;

[0044] The length of the lap joint welding specimen and the T-joint bottom plate 14 is 160 mm, the width is 50 mm, the diameter of the positioning circular hole 16 is 8 mm, the length of the positioning oblong hole 17 is 16 mm, the width is 8 mm, the center of the positioning hole is 10 mm from the edge and matches the position of the positioning column 2;

[0045] The length of the T-joint side plate 15 is 160 mm and the width is 40 mm.

Claims

1. A thin plate welding positioning fixture suitable for various joints, characterized by: It comprises a base plate (1), a positioning column (2), a spring (3), a fixing bolt (4), a pressure plate (5), a nut (6), and a pad (7). The base plate (1) is a square plate. The area of ​​the base plate (1) is larger than the area of ​​the two welded thin plates. A welding long groove (9) with a square cross-section is provided in the middle of the base plate (1). The welding long groove (9) is located below the weld bead of the two welded thin plates. Positioning holes (12) are respectively provided at both ends of the base plate (1) on one side of the welding long groove (9) and at one end of the base plate (1) on the other side of the welding long groove (9). The positioning column (2) and the spring (3) are placed in the positioning hole (12). The spring (3) is located below the positioning column (2). The positioning column (2) and the positioning hole (12) are in sliding fit. The edges of the base plate (1) at both ends of the welding long groove (9) are respectively welded. There are two fixing bolts (4), which are located on both sides of the welding long groove (9). The pressing plate (5) is a rectangular plate. Two circular holes are respectively provided at both ends of the length direction of the pressing plate (5). The positions of the circular holes are opposite to the fixing bolts (4) of the bottom plate (1). The circular holes at both ends of the pressing plate (5) are sleeved on the fixing bolts (4) at both ends of the bottom plate (1) and are locked by nuts (6). A square slot hole (11) is provided in the middle of the pressing plate (5) along the length direction. The square slot hole (11) is opposite to the welding long groove (9) of the bottom plate (1). The length of the square slot hole (11) matches the welding long groove (9). The width of the square slot hole (11) is greater than the width of the welding long groove (9). The pad (7) is a rectangular plate. The thickness of the pad (7) is the same as the thickness of the overlapped welded thin plate.

2. The thin plate welding positioning fixture applicable to various joints according to claim 1 is characterized in that: The positioning column (2) is a stepped cylinder. The diameter of the upper large diameter section of the positioning column (2) matches the diameter of the positioning hole (12). The spring (3) is mounted on the lower small diameter section of the positioning column (2). The outer diameter of the spring (3) matches the diameter of the positioning hole (12). The stepped surface of the positioning column (2) is pressed against the upper end of the spring (3). The length of the positioning column (2) extending out of the plane of the bottom plate (1) in the natural state of the spring (3) matches the thickness of the two overlapping welded thin plates. After the positioning column (2) compresses the spring (3) and is embedded in the positioning hole (12), the upper end surface is flush with the plane of the bottom plate (1).

3. The thin plate welding positioning fixture applicable to various joints according to claim 1 is characterized in that: One side of the bottom plate (1) has two parallel slots (10); the T-joint support plate (8) is a rectangular plate; the upper end of the T-joint support plate (8) has a right-angled V-shaped notch; one side of the V-shaped notch is provided with a slot on the plate surface at a 45° angle downward; the two T-joint support plates (8) are placed in parallel; and the lower ends of the two T-joint support plates (8) are respectively inserted into the two parallel slots (10) of the bottom plate (1).

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