Annular argon arc welding clamp for bearing seat and using method of annular argon arc welding clamp

Abstract

The invention discloses a bearing seat annular argon arc welding fixture and a using method thereof, and belongs to the technical field of welding fixtures. The lower portion of the base is connected with a plurality of lower pressing plates, the middle of the upper end of the base is fixedly connected with a taper sleeve through taper sleeve bolts, the outer side of the taper sleeve is attached to wedge-shaped faces of a plurality of positioning blocks, a guide pipe is inserted into the upper end of each positioning block, air channels are formed in the guide pipes and the interiors of the corresponding positioning blocks in a communicating mode, and the air channels are communicated with the guide pipes. A plurality of air outlets are formed in the outer side wall of each positioning block; the upper end of the base is fixedly connected with the annular pressing plate. By means of the ingenious structural design, accurate positioning and tensioning of the lower portion of a product are achieved, meanwhile, assembling and pressing of the upper portion of the product are facilitated, the problem that argon protection gas rushes into the annular structure in the welding process is solved, and the welding quality is improved; and the clamp is reasonable in structure, good in machining manufacturability and convenient to operate, the labor intensity is reduced, the working efficiency is improved, and the actual production requirement is met.

Description

Technical Field

[0001] The invention relates to a bearing seat annular argon arc welding fixture and a use method thereof, belonging to the technical field of welding fixtures. Background Art

[0002] In the assembly and welding process of the bearing seat annular argon arc welding products, due to the special structure and strict positioning requirements of the products, it is particularly important to design a special welding fixture. However, the existing technology faces many challenges:

[0003] 1. The structural characteristics of the product result in a relatively high welding position. Therefore, the fixture structure needs to be designed to take into account both convenience and the specific requirements of the welding position to ensure the smooth progress of the welding process.

[0004] 2. The product assembly involves welding of two annular pieces on the entire ring belt, and the argon arc welding process is used. In order to protect the welding area from oxidation, argon gas needs to be injected as a protective gas. However, due to the particularity of the annular structure, the argon box cannot directly enter the interior of the product for gas injection, so the fixture structure needs to be specially designed to achieve effective injection of argon gas into the inner cavity.

[0005] 3. The processing technology of the fixture is also a factor that must be considered during the design process. The fixture structure should be designed reasonably to ensure its processability and practicality to meet actual production needs.

[0006] 4. Product positioning requirements are strict, and the fixture structure and its use process must be able to accurately meet this positioning requirement to ensure welding quality.

[0007] 5. In view of the large size of the product, the fixture design should be easy to operate to improve work efficiency and reduce labor intensity.

[0008] 6. The complexity of product structure and fixture design requires that the interference between multiple positions must be fully considered during the design process, and reasonable avoidance must be made to ensure the overall rationality of the fixture structure. Summary of the invention

[0009] In order to solve the problems existing in the background technology, the present invention provides a bearing seat annular argon arc welding fixture and a use method thereof.

[0010] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a bearing seat annular argon arc welding fixture, comprising a base, a lower pressure plate, an annular pressure plate, a conduit, a cone sleeve, a cone sleeve bolt and a positioning block; the lower part of the base is connected to multiple lower pressure plates, the middle part of the upper end of the base is fixedly connected to the cone sleeve by the cone sleeve bolts, the outer side of the cone sleeve is fitted with the wedge surfaces of multiple positioning blocks, a conduit is inserted into the upper end of each positioning block, each conduit is provided with an air duct connected to the inside of the corresponding positioning block, and the outer wall of each positioning block is provided with multiple air outlets; the upper end of the base is fixedly connected to the annular pressure plate.

[0011] The base includes a bottom plate, columns and a top plate; the upper end of the bottom plate is welded and fixed to the lower ends of multiple columns, the upper end of each column is welded and fixed to the top plate, the upper surface of the top plate is provided with a center hole and multiple slides, and the multiple slides are all arranged along the radial direction of the top plate; the upper surface of the bottom plate is connected to multiple lower pressure plates, a cone sleeve is inserted in the center hole, and a positioning block is slidably provided in each slide.

[0012] Each of the positioning blocks includes a positioning ring and an expansion block; the wedge-shaped surface of the inner end of the expansion block is fitted with the wedge-shaped surface of the cone sleeve, the outer end of the expansion block is fixedly connected to the inner end of the positioning ring, a catheter is inserted into the upper end of the expansion block, and the expansion block is slidably arranged in the corresponding slideway, the interior of the positioning ring and the expansion block has an air passage connected to the catheter, and the outer wall of the positioning ring is provided with an air outlet; pads are provided at both ends of the interior of the positioning ring.

[0013] The positioning blocks include large positioning blocks and small positioning blocks of the same number and arranged alternately one by one. The large positioning blocks include large expansion blocks and large positioning rings. The small positioning blocks include small positioning rings and small expansion blocks. The side walls of each adjacent large positioning ring and small positioning ring are fitted with each other.

[0014] Each expansion block is slidably plugged with an expansion block bolt, the outer side of the expansion block bolt is sleeved with a washer, and the lower end of the expansion block bolt is screwed to the base.

[0015] A cylindrical pin is inserted into the cone sleeve bolt, and the cylindrical pin is arranged in the cone sleeve.

[0016] A method for using a bearing seat annular argon arc welding fixture of the present invention comprises the following steps:

[0017] S1: Fix the base on the welding workbench;

[0018] S2: The lower part of the product is guided and assembled on the base through the outer diameter of the top plate in the base, and the lower part of the product is pressed and positioned by the lower pressing plate;

[0019] S3: After the positioning block and the corresponding conduit are assembled, they are respectively installed into the corresponding slideway;

[0020] S4: Insert the cone sleeve into the center hole of the base through the cone sleeve bolt, so that the cone surface of the cone sleeve contacts the cone surface of the positioning block, push the positioning block to slide, so that the outer wall of the positioning block contacts the inner wall of the product, and realize the positioning and tightening of the lower part of the product. At the same time, the air outlet of the positioning block corresponds to the welding position H of the product;

[0021] S5: Tighten the expansion block bolts to fix the position of the positioning block through the washers;

[0022] S6: Assemble the upper part of the product onto the positioning block to ensure that the upper and lower parts of the product fit together;

[0023] S7: Assemble the annular pressing plate away from the position of the conduit so that the inclined surface of the annular pressing plate is pressed onto the upper outer wall of the product, and tighten the bolts of the annular pressing plate to press the upper part of the product. The upper and lower parts of the product are positioned and pressed;

[0024] S8: Connect the argon box pipeline to all the conduits and flush the product with argon;

[0025] S9: Weld the joints between the upper and lower parts of the product to complete the circular argon arc welding of the product.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention realizes precise positioning and tightening of the lower part of the product through ingenious structural design, and is convenient for assembly and pressing of the upper part of the product, solving the problem of argon shielding gas intrusion during the welding of the annular structure and improving the welding quality; the fixture has a reasonable structure, good processing technology, and convenient operation, which reduces labor intensity, improves work efficiency, and meets actual production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 yes Figure 1 A cross-sectional view of

[0030] Figure 3 It is a schematic diagram of the structure of the base;

[0031] Figure 4 yes Figure 3 A cross-sectional view of

[0032] Figure 5 It is a schematic diagram of the structure of the base plate;

[0033] Figure 6 yes Figure 5 A cross-sectional view of

[0034] Figure 7 It is a schematic diagram of the structure of the top plate;

[0035] Figure 8 yes Figure 7 A cross-sectional view of

[0036] Fig. 9 It is a schematic diagram of the structure of the annular pressure plate;

[0037] Fig.10 yes Fig. 9 A cross-sectional view of

[0038] Fig.11 It is a schematic diagram of the structure of the small positioning ring;

[0039] Fig.12 yes Fig.11 A cross-sectional view of

[0040] Fig.13 It is a schematic diagram of the structure of the large positioning ring;

[0041] Fig.14 yes Fig.13 A cross-sectional view of

[0042] Fig.15 It is a schematic diagram of the structure of the small rising block;

[0043] Fig.16 yes Fig.15 A cross-sectional view of

[0044] Fig.17 It is a schematic diagram of the structure of the large rising block;

[0045] Fig.18 yes Fig.17 A cross-sectional view of

[0046] Fig.19 It is a structural diagram of the cone sleeve. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0048] A bearing seat annular argon arc welding fixture, including a base 1, a lower pressure plate 2, an annular pressure plate 8, a guide tube 12, a cone sleeve 15, a cone sleeve bolt 16 and a positioning block; the lower part of the base 1 is connected to multiple lower pressure plates 2, and the middle part of the upper end of the base 1 is fixedly connected to the cone sleeve 15 by the cone sleeve bolt 16. Due to the large size of the product, the fixture should be easy to operate to improve work efficiency. The cone sleeve 15 adopts a conical surface structure. When the cone sleeve bolt 16 is tightened downward, the cone sleeve 15 contacts downward with the conical surface of the positioning block, pushing the positioning block to slide, forming a linkage, and meeting the positioning requirements. The outer side of the cone sleeve 15 is fitted with the wedge-shaped surfaces of multiple positioning blocks. The upper end of each positioning block is plugged with a vertically arranged conduit 12. Each conduit 12 is provided with an air passage connected to the inside of the corresponding positioning block. The outer wall of each positioning block is provided with multiple air outlets. Since two annular single pieces need to be welded on the entire annular belt, argon needs to be injected into the product as a protective gas for argon arc welding to isolate the air outside the welding area to prevent oxidation of the welding area to achieve welding requirements. The annular structure welding causes the argon box to be unable to enter the product to inject argon. Therefore, the combined structure of the positioning block and the conduit is used to form an air passage. The argon box can be connected to the conduit, and multiple air outlets are processed at the position where the positioning ring is flush with the welding position. Argon is injected into the inner wall of the product to ensure welding requirements. The upper end of the base 1 is fixedly connected to the annular pressure plate 8 by corresponding connecting bolts. The annular pressure plate 8 adopts an annular structure according to the shape of the product. The pressing part is an inclined surface, which contacts the inclined surface of the outer wall of the product. The annular pressure plate 8 is pressed by connecting bolts, and the positioning blocks are evenly distributed in all directions at the pressing position. At the same time, in order to avoid the conduit for rushing in argon gas, the annular pressure plate 8 is designed into a "flower" shape structure to realize the pressing function of the product.

[0049] The base 1 includes a bottom plate 1-1, columns 1-2 and a top plate 1-3; the upper end of the bottom plate 1-1 is welded and fixed to the lower ends of multiple columns 1-2 evenly distributed along its circumference, and the upper end of each of the columns 1-2 is welded and fixed to the top plate 1-3. The upper surface of the top plate 1-3 is provided with a center hole 1-5 and multiple slideways 1-4. The multiple slideways 1-4 are all arranged along the radial direction of the top plate 1-3 and evenly distributed along the circumference of the top plate 1-3, and the multiple slideways 1-4 are connected to the center hole 1-5; the upper surface of the bottom plate 1-1 is connected to multiple lower pressure plates 2 evenly distributed along its circumference through corresponding supporting structures, a cone sleeve 15 is inserted in the center hole 1-5, and a positioning block is slidably provided in each slideway 1-4.

[0050] Due to the structural characteristics of the product, the welding position is relatively high, so the base 1 uses columns 1-2 to weld the bottom plate 1-1 and the top plate 1-3 to raise the fixture and control it to the welding ring position.

[0051] Each of the positioning blocks includes a positioning ring and an expansion block; the wedge-shaped surface at the inner end of the expansion block is fitted with the wedge-shaped surface of the cone sleeve 15, the outer end of the expansion block is fixedly connected to the inner end of the positioning ring by a positioning pin, the upper end of the expansion block is plugged with a conduit 12, and the expansion block is slidably arranged in the corresponding slideway 1-4, the interior of the positioning ring and the expansion block has an air passage connected to the conduit 12, and the outer side wall of the positioning ring is provided with an air outlet; both ends of the interior of the positioning ring are provided with pads for closing the air passage to ensure normal air outlet.

[0052] In order to ensure the processability of the fixture processing, a two-body structure is adopted between the locating ring and the expansion block, which is convenient for the processing of the slender hole for the argon gas duct and has strong processability. Since the locating ring needs to contact the inside of the product, copper material is used for processing to prevent scratches on the parts. However, the copper locating ring is also easy to be damaged, affecting the positioning. Therefore, a two-body structure is adopted to facilitate the replacement of the locating ring.

[0053] The positioning blocks include large positioning blocks and small positioning blocks of the same number and arranged alternately along the circumference of the base 1. The large positioning blocks include large expansion blocks 18 and large positioning rings 19. The small positioning blocks include small positioning rings 6 and small expansion blocks 11. The side walls of each adjacent large positioning ring 19 and small positioning ring 6 are fitted together.

[0054] The product positioning requirements are high. The top plate in the base 1 is designed with eight evenly distributed slideways 1-4, which cooperate with the expansion block. Four evenly distributed small positioning rings 6 and four evenly distributed large positioning rings 19 are alternately arranged to form a full circle. When the small expansion block 11 slides outward at the junction of the side wall of the large positioning ring 19 and the side wall of the small positioning ring 6, the small positioning ring can push the large positioning ring to form a linkage, which is convenient for operation and adjustment, so that the inclined surface of the positioning ring fits the inside of the product to ensure the positioning requirements. The setting of the large positioning block and the small positioning block better ensures the positioning state.

[0055] An expansion block bolt 13 is slidably inserted on each expansion block, and a washer 14 is sleeved on the outer side of the expansion block bolt 13. The lower end of the expansion block bolt 13 is screwed to the base 1.

[0056] The cone sleeve bolt 16 is plugged with a cylindrical pin 17, which is arranged in the cone sleeve 15. Since the cone sleeve 15 is difficult to disassemble after the cone surface is in contact, after the bolt 16 is inserted into the cone sleeve 15, a φ4 hole is combined and processed on the bolt 16, and the cylindrical pin 17 is assembled. When the bolt is disassembled, the cone sleeve 15 can be taken out, which is convenient for disassembly.

[0057] A method for using a bearing seat annular argon arc welding fixture of the present invention comprises the following steps:

[0058] S1: fix the base 1 on the welding workbench;

[0059] S2: The lower part of the product is guided and assembled onto the base 1 through the outer diameter of the top plate in the base 1, and the lower part of the product is pressed and positioned by the lower pressing plate 2;

[0060] S3: After the positioning block and the corresponding guide tube 12 are assembled, they are respectively installed into the corresponding slideways 1-4;

[0061] S4: Install the cone sleeve 15 into the center hole 1-5 of the base 1 through the cone sleeve bolt 16, so that the cone surface of the cone sleeve 15 contacts the cone surface of the positioning block, push the positioning block to slide, and make the outer wall of the positioning block contact the inner wall of the product to achieve positioning and tightening of the lower part of the product. At the same time, the air outlet of the positioning block corresponds to the welding position H of the product.

[0062] S5: Tighten the expansion block bolt 13 to fix the position of the positioning block through the washer 14;

[0063] S6: Assemble the upper part of the product onto the positioning block to ensure that the upper and lower parts of the product fit together;

[0064] S7: Assemble the annular pressing plate 8 away from the position of the conduit 12, so that the inclined surface of the annular pressing plate 8 is pressed onto the upper outer wall of the product, and tighten the annular pressing plate bolts 9 to press the upper part of the product. The upper and lower parts of the product are positioned and pressed, and the position of the annular argon arc welding to be performed is fixed;

[0065] S8: Connect the argon box pipeline to all the conduits 12 to flush the product with argon;

[0066] S9: Weld the joints between the upper and lower parts of the product to complete the circular argon arc welding of the product.

[0067] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0068] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bearing seat annular argon arc welding fixture, characterized in that: It comprises a base (1), a lower pressure plate (2), an annular pressure plate (8), a conduit (12), a cone sleeve (15), a cone sleeve bolt (16) and a positioning block; the lower part of the base (1) is connected to a plurality of lower pressure plates (2); the middle part of the upper end of the base (1) is fixedly connected to the cone sleeve (15) by means of the cone sleeve bolt (16); the outer side of the cone sleeve (15) is fitted with the wedge-shaped surfaces of a plurality of positioning blocks; the upper end of each positioning block is plugged with a conduit (12); each conduit (12) is provided with an air passage communicating with the interior of the corresponding positioning block; and the outer side wall of each positioning block is provided with a plurality of air outlets; the upper end of the base (1) is fixedly connected to the annular pressure plate (8).

2. The annular argon arc welding fixture for a bearing seat according to claim 1 is characterized in that: The base (1) comprises a bottom plate (1-1), columns (1-2) and a top plate (1-3); the upper end of the bottom plate (1-1) is welded and fixed to the lower ends of a plurality of columns (1-2), the upper end of each column (1-2) is welded and fixed to the top plate (1-3), the upper surface of the top plate (1-3) is provided with a center hole (1-5) and a plurality of slideways (1-4), and the plurality of slideways (1-4) are all arranged along the radial direction of the top plate (1-3); the upper surface of the bottom plate (1-1) is connected to a plurality of lower pressure plates (2), a cone sleeve (15) is inserted into the center hole (1-5), and a positioning block is slidably provided in each slideway (1-4).

3. The annular argon arc welding fixture for a bearing seat according to claim 2 is characterized in that: Each positioning block comprises a positioning ring and an expansion block; the wedge-shaped surface at the inner end of the expansion block is arranged to fit with the wedge-shaped surface of the cone sleeve (15); the outer end of the expansion block is fixedly connected to the inner end of the positioning ring; the upper end of the expansion block is plugged with a catheter (12); the expansion block is slidably arranged in a corresponding slideway (1-4); the interior of the positioning ring and the expansion block has an air passage connected to the catheter (12); the outer wall of the positioning ring is provided with an air outlet; pads are provided at both ends of the interior of the positioning ring.

4. The annular argon arc welding fixture for a bearing seat according to claim 3 is characterized in that: The positioning blocks include large positioning blocks and small positioning blocks of the same number and arranged alternately one by one. The large positioning blocks include large expansion blocks (18) and large positioning rings (19). The small positioning blocks include small positioning rings (6) and small expansion blocks (11). The side walls of each adjacent large positioning ring (19) and small positioning ring (6) are arranged to fit each other.

5. The annular argon arc welding fixture for a bearing seat according to claim 3 is characterized in that: An expansion block bolt (13) is slidably inserted on each expansion block, a washer (14) is sleeved on the outer side of the expansion block bolt (13), and the lower end of the expansion block bolt (13) is screwed to the base (1).

6. The annular argon arc welding fixture for a bearing seat according to claim 1, characterized in that: A cylindrical pin (17) is inserted into the cone sleeve bolt (16), and the cylindrical pin (17) is arranged in the cone sleeve (15).

7. A method for using the annular argon arc welding fixture for a bearing seat according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S1: fix the base (1) on the welding workbench; S2: The lower part of the product is guided and assembled onto the base (1) through the outer diameter of the top plate in the base (1), and the lower part of the product is pressed and positioned by the lower pressing plate (2); S3: After the positioning block and the corresponding guide tube (12) are assembled, they are respectively installed into the corresponding slideways (1-4); S4: The cone sleeve (15) is installed into the central hole (1-5) of the base (1) through the cone sleeve bolt (16), so that the cone surface of the cone sleeve (15) contacts the cone surface of the positioning block, and the positioning block is pushed to slide, so that the outer wall of the positioning block contacts the inner wall of the product, so as to achieve positioning and tightening of the lower part of the product. At the same time, the air outlet of the positioning block corresponds to the welding position H of the product. S5: Tighten the expansion block bolt (13) to fix the position of the positioning block through the washer (14); S6: Assemble the upper part of the product onto the positioning block to ensure that the upper and lower parts of the product fit together; S7: Assemble the annular pressing plate (8) away from the position of the conduit (12), so that the inclined surface of the annular pressing plate (8) is pressed onto the upper outer wall of the product, and tighten the annular pressing plate bolts (9) to press the upper part of the product, so that the upper and lower parts of the product are positioned and pressed; S8: Connect the argon box pipeline to all the conduits (12) to flush the product with argon; S9: Weld the joints between the upper and lower parts of the product to complete the circular argon arc welding of the product.

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