A method of manufacturing a guide beam

Abstract

The application discloses a guide beam manufacturing method, and belongs to the technical field of parts manufacturing for bridge construction, and solves the technical problem of low manufacturing and processing precision of the guide beam in the prior art. The manufacturing method comprises the following steps: assembling two guide beam unit elements respectively, and adopting symmetrical welding for welding of a first web plate and first and second cover plates of each guide beam unit element and welding between a second web plate and the first and second cover plates; and aligning the connecting ends of the two guide beam unit elements, drilling and positioning holes for initial positioning, and then drilling and positioning first bolt holes for bolting. The guide beam manufactured by the application reduces manufacturing errors and welding residual stress, improves the processing precision of the guide beam, and the bolting method and mode further improve the splicing precision of the guide beam, and the flatness and parallelism of the guide beam are also significantly improved, so that the precision of the finally manufactured guide beam is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction component manufacturing technology, specifically a method for manufacturing a guide beam. Background Technology

[0002] In the manufacturing process of steel bridges, the main girder is broken at mid-span according to the stress requirements of the main bridge structure. Its basic structure consists of symmetrical rectangular guide beams set inside the large steel girder. One end of the guide beam is confined, while the other end is free, allowing longitudinal relative sliding. The manufacturing and processing accuracy of the guide beam has a significant impact on its operating condition. The guide beam is a steel structural component welded from thick plates, and it is broken at mid-span and connected by high-strength bolts. Its structural characteristics place extremely high demands on the bolting and assembly accuracy, flatness, and parallelism. Manufacturing errors and welding residual stress can affect the processing accuracy of the guide beam. Therefore, how to reasonably formulate the manufacturing and processing method of the guide beam and improve its manufacturing and processing accuracy has become a problem that needs to be addressed by those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to provide a method for manufacturing a guide beam, so as to at least partially solve the technical problem of low manufacturing precision of guide beams in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a guide beam manufacturing method, the guide beam manufacturing method comprising:

[0005] Two guide beam units are assembled separately. The welding of the first web plate to the first cover plate and the second cover plate and the welding of the second web plate to the first cover plate and the second cover plate of each guide beam unit are symmetrical.

[0006] The positioning holes and first bolting holes on the flanges connecting the assembled guide beam units, and the second bolting holes on the side end faces, the diameters of the positioning holes, first bolting holes and second bolting holes on one of the guide beam units are the forming size, and the positioning holes on the other guide beam unit are smaller than the forming size.

[0007] Align the ends of the two guide beam units, drill the hole diameter of the positioning hole on the other guide beam unit to the forming size, and connect the positioning holes on the two guide beam units with positioning pins that match the positioning holes to complete the initial positioning of the ends of the two guide beam units.

[0008] Drill the first bolt hole on the flange of the other guide beam unit that was initially positioned, and fix the first bolt holes at the ends of the two guide beam units with bolts to complete the end fixing of the two guide beam units.

[0009] A splicing plate is fixedly installed on the second bolt hole of one of the guide beam units. A second bolt hole is drilled on another guide beam unit through the connecting hole of the splicing plate. The splicing plate fixes the second bolt holes of the two guide beam units, thus completing the side end fixing of the two guide beam units.

[0010] Furthermore, the assembly of the two guide beam units specifically includes:

[0011] Raw material pretreatment: Select the sheet material and feed it onto the pretreatment conveyor roller table. The sheet material is then subjected to leveling, shot blasting and primer treatment in sequence.

[0012] The pre-treated sheet metal is processed into the first cover plate, second cover plate, first web plate, second web plate, partition plate, flange and steel gasket of the guide beam unit. The processed first cover plate, second cover plate, first web plate, second web plate and partition plate are then subjected to secondary leveling treatment.

[0013] The first cover plate and the second cover plate are processed to the forming dimensions.

[0014] Furthermore, the first web and the second web are processed to the final dimensions, specifically including:

[0015] The first web and the second web are respectively rough machined to have a 10mm allowance in the height direction;

[0016] The first and second web plates, after rough machining, are semi-finished by 3mm.

[0017] The first and second web plates, after being semi-finished, are finished to have a 1mm allowance.

[0018] Furthermore, the partition is rough-machined to have a 5mm allowance in both the length and height directions, and then fine-machined to have a 1mm allowance.

[0019] Furthermore, the flange and the steel gasket are machined to have a 5mm allowance in the thickness direction.

[0020] Furthermore, stress relief treatment is performed on the guide beam unit after welding.

[0021] Furthermore, the guide beam unit is subjected to a vibration aging process to relieve stress after welding.

[0022] Furthermore, machining the positioning hole and the first bolting hole specifically includes:

[0023] An axis is engraved on the guide beam unit. During the machining of the flange in the thickness direction, the perpendicularity of the axis on the guide beam unit to the machining surface of the flange is measured, and the flange in the thickness direction is machined to the forming size.

[0024] Machining lines are drawn on the flange to form positioning holes and the first bolting hole, and the positioning holes and the first bolting hole are drilled.

[0025] Furthermore, after fixing the side ends of the two guide beam unit components, the guide beam manufacturing method further includes:

[0026] The steel pad is assembled onto the two guide beam unit components;

[0027] The steel pads machined and assembled on the two guide beam units meet the requirements.

[0028] Furthermore, the steel pads processed and assembled on the two guide beam unit components meet the requirements, specifically including:

[0029] The steel pad located on one end face is milled to the forming size, and using this face as a reference face, the steel pads on the other three sides are milled to the forming size in sequence.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: the processing and manufacturing method of this guide beam adopts a symmetrical welding method during the assembly and welding of the plates, which reduces the residual stress and deformation between the plates; during the splicing of two guide beam units through flanges, a bolting hole method is adopted, which improves the splicing accuracy, parallelism and flatness of the guide beam; therefore, the manufacturing method of this guide beam can greatly reduce the manufacturing dimensional error of the guide beam, eliminate the residual stress generated during welding, and at the same time, the flatness and parallelism of the guide beam after bolting and assembly are improved, and the final manufacturing accuracy of the guide beam is greatly improved. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the guide beam of the present invention;

[0032] Figure 2 This is a side three-dimensional structural diagram of the partition end of the guide beam unit of the present invention;

[0033] Figure 3 This is a side three-dimensional structural diagram of the flange end of the guide beam unit of the present invention;

[0034] Figure 4 This is a schematic diagram illustrating the machining accuracy requirements of the guide beam of the present invention;

[0035] In the figure: 1. First cover plate; 2. Second cover plate; 3. First web plate; 4. Second web plate; 5. Partition plate; 6. Flange; 61. Positioning hole; 7. Steel pad plate; 8. First bolt hole; 9. Second bolt hole; 10. Splicing plate; 101. Guide beam unit. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Because of the installation process and environment of the guide beam inside the large steel beam, the requirements for the bolting and assembly accuracy, flatness and parallelism of the guide beam are extremely high, which in turn places higher demands on the manufacturing and processing methods of the guide beam.

[0038] The applicant provides a method for manufacturing guide beams to produce guide beams that meet the above requirements. Specifically, please refer to the appendix. Figure 1-4 The guide beam manufacturing method includes:

[0039] Two guide beam units 101 are assembled separately. The welding of the first web plate 3 to the first cover plate 1 and the second cover plate 2 and the welding of the second web plate 4 to the first cover plate 1 and the second cover plate 2 of each guide beam unit 101 are symmetrical. This symmetrical welding method can effectively eliminate the residual stress generated by the welding between the plates, thereby improving the service life of the guide beam.

[0040] The positioning hole 61 and the first bolting hole 8 on the flange 6 connected to the completed guide beam unit 101, and the second bolting hole 9 on the side end face, the hole diameter of the positioning hole 61, the first bolting hole 8 and the second bolting hole 9 on one guide beam unit 101 are the forming size, and the positioning hole 61 on the other guide beam unit 101 is 5mm smaller than the forming size.

[0041] Align the ends of the two guide beam units 101. Drill the positioning hole 61 on the other guide beam unit 101 to the specified size. Specifically, since the welded guide beam unit 101 is very large, the installer can enter the interior of the guide beam unit 101 through the through hole on the partition plate 5 or flange 6. From the inside, follow the guide beam unit 101 with the pre-drilled positioning hole 61 to enlarge the smaller positioning hole 61 on the other guide beam unit 101. Connect the positioning holes 61 on the two guide beam units 101 with the positioning pin that matches the positioning hole 61 to complete the initial positioning of the ends of the two guide beam units 101.

[0042] Drill the first bolting hole 8 on the flange 6 of the initially positioned guide beam unit 101. Specifically, since the welded guide beam unit 101 is very large, the installer can enter the interior of the guide beam unit 101 through the through hole on the partition plate 5 or the flange 6, and drill the first bolting hole 8 on the other guide beam unit 101 from the inside, following the guide beam unit 101 with the first bolting hole 8 already drilled. Then, fix the first bolting holes 8 at the ends of the two guide beam unit 101s together with bolts to complete the end fixing of the two guide beam unit 101s.

[0043] A splicing plate 10 is bolted to the second bolting hole 9 of a guide beam unit 101. The splicing plate 10 has connecting holes for connecting two guide beam units 101. One side of the splicing plate 10 connects to the guide beam unit 101 with its pre-drilled second bolting hole 9. The other side of the guide beam unit 101 has its second bolting hole 9 drilled through the connecting hole of the splicing plate 10 and then bolted in place. The splicing plate 10 secures the second bolting holes 9 of the two guide beam units 101, completing the side-end fixing of the two guide beam units 101. During the splicing of the two guide beam units 101 via the flange 6, the use of drilled bolting holes improves the splicing accuracy, parallelism, and flatness of the guide beams.

[0044] The assembly of two guide beam unit components 101 specifically includes:

[0045] Raw material pretreatment: Select the sheet material and send it onto the pretreatment conveyor roller table. The sheet material is then subjected to leveling, shot blasting and primer treatment in sequence.

[0046] The pre-treated sheet metal is processed into the first cover plate 1, the second cover plate 2, the first web plate 3, the second web plate 4, the partition plate 5, the flange 6, and the steel gasket 7 of the guide beam unit 101. The processed first cover plate 1, the second cover plate 2, the first web plate 3, the second web plate 4, and the partition plate 5 are then subjected to secondary leveling treatment.

[0047] The first cover plate 1 and the second cover plate 2 are processed to the forming dimensions.

[0048] The first web 3 and the second web 4 are processed to the final dimensions, specifically including:

[0049] The first web 3 and the second web 4 are rough machined to a height allowance of 10 mm, which is conventionally referred to as reserving a 10 mm machining allowance by those skilled in the art; the first web 3 and the second web 4 after rough machining are semi-finished by 3 mm; the first web 3 and the second web 4 after semi-finished machining are finished to a height allowance of 1 mm, which is conventionally referred to as reserving a 1 mm machining allowance by those skilled in the art.

[0050] The partition 5 is rough machined to have a 5mm allowance in both the length and height directions, and then fine machined to have a 1mm allowance, which is what those skilled in the art would conventionally refer to as reserving a 1mm machining allowance.

[0051] The flange and steel gasket are machined to a thickness allowance of 5mm, which is commonly referred to as a 5mm machining allowance by those skilled in the art.

[0052] Stress relief treatment is performed on the welded guide beam unit 101. Specifically, vibration aging is used to relieve stress on the welded guide beam unit 101. Of course, other methods for relieving internal stress in steel plates can also be used, and no limitation is made here.

[0053] To machine the positioning hole 61 and the first bolting hole 8 on the flange 6, it is necessary to first etch the axis on the guide beam unit 101 and the machining lines for the positioning hole 61 and the first bolting hole 8 on the flange 6, and then mill the flange 6 in the thickness direction to the forming size. This is to ensure the perpendicularity of the bolting surface of the flange 6 to the axis of the guide beam, thereby ensuring the perpendicularity of the positioning hole 61 and the first bolting hole 8 on the flange 6 to the axis of the guide beam.

[0054] After the side ends of the two guide beam unit components 101 are fixed, the guide beam manufacturing method further includes:

[0055] Assemble the steel pad 7 onto the two guide beam unit components 101;

[0056] The steel pads 7 machined and assembled on the two guide beam unit components 101 meet the requirements. Specifically, this includes milling the steel pad 7 located on one end face to the specified dimensions, and using this face as a reference surface, sequentially milling the steel pads 7 on the other three sides to the specified dimensions. This further ensures the parallelism and perpendicularity of the steel pads 7 on each side of the guide beam, resulting in higher tolerance accuracy of the guide beam after machining.

[0057] Finally, the processing dimensions of the guide beam after processing are inspected. The inspection method of the guide beam is as follows: (1) The external dimensions and behavioral tolerances of the guide beam are inspected using an API laser tracker and a dial indicator. Specifically, the behavioral tolerances are mainly inspected for the flatness, parallelism and perpendicularity of the steel pads on each side end face of the guide beam; (2) After disassembling the assembled guide beam into two guide beam unit parts 101, they are reassembled and spliced ​​into a guide beam. The spliced ​​guide beam is re-measured using an API laser tracker. The re-measurement results are compared with the initial results, and it is analyzed whether the re-measurement results are within the allowable error range.

[0058] The guide beam manufactured through the above steps reduces manufacturing errors and welding residual stress, improves the processing accuracy of the guide beam, and further improves the splicing accuracy of the guide beam by its bolting method and approach, and its flatness and parallelism are also significantly improved.

[0059] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0060] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a guide beam, characterized in that, The method for manufacturing the guide beam includes: Two guide beam units are assembled separately. The welding of the first web plate to the first cover plate and the second cover plate and the welding of the second web plate to the first cover plate and the second cover plate of each guide beam unit are symmetrical. The positioning holes and first bolting holes on the flanges connecting the assembled guide beam units, and the second bolting holes located on the side end faces after machining and assembly, the diameters of the positioning holes, first bolting holes and second bolting holes on one of the guide beam units are the forming size, and the positioning holes on the other guide beam unit are smaller than the forming size. Align the ends of the two guide beam units, drill the hole diameter of the positioning hole on the other guide beam unit to the forming size, and connect the positioning holes on the two guide beam units with positioning pins that match the positioning holes to complete the initial positioning of the ends of the two guide beam units. Drill the first bolt hole on the flange of the other guide beam unit that was initially positioned, and fix the first bolt holes at the ends of the two guide beam units with bolts to complete the end fixing of the two guide beam units. A splicing plate is fixedly installed on the second bolt hole of one of the guide beam units. A second bolt hole is drilled on another guide beam unit through the connecting hole of the splicing plate. The splicing plate fixes the second bolt holes of the two guide beam units, thus completing the side end fixing of the two guide beam units. The assembly of the two guide beam unit components specifically includes: Raw material pretreatment: Select the sheet material and feed it onto the pretreatment conveyor roller table. The sheet material is then subjected to leveling, shot blasting and primer treatment in sequence. The pre-treated sheet metal is processed into the first cover plate, second cover plate, first web plate, second web plate, partition plate, flange and steel gasket of the guide beam unit. The processed first cover plate, second cover plate, first web plate, second web plate and partition plate are then subjected to secondary leveling treatment. The first cover plate and the second cover plate are processed to the forming dimensions; The machining of the positioning hole and the first bolting hole specifically includes: An axis is engraved on the guide beam unit. During the machining of the flange in the thickness direction, the perpendicularity of the axis on the guide beam unit to the machining surface of the flange is measured, and the flange in the thickness direction is machined to the forming size. Machining lines are etched on the flange to form the positioning hole and the first bolting hole, and the positioning hole and the first bolting hole are drilled.

2. The method for manufacturing a guide beam according to claim 1, characterized in that: The processing methods for the first web and the second web specifically include: The first web and the second web are respectively rough machined to have a 10mm allowance in the height direction; The first and second web plates, after rough machining, are semi-finished by 3mm. The first and second web plates, after being semi-finished, are finished to have a 1mm allowance.

3. The method for manufacturing a guide beam according to claim 1, characterized in that: The partition is roughly machined to have a 5mm allowance in both the length and height directions, and then finely machined to have a 1mm allowance.

4. The method for manufacturing a guide beam according to claim 1, characterized in that: The flange and the steel gasket are machined to a thickness allowance of 5mm.

5. A method for manufacturing a guide beam according to claim 1, characterized in that: Stress relief treatment is performed on the guide beam unit after welding.

6. A method for manufacturing a guide beam according to claim 5, characterized in that: The guide beam unit components after welding are subjected to stress relief using a vibration aging process.

7. A method for manufacturing a guide beam according to claim 1, characterized in that: After the side ends of the two guide beam unit components are fixed, the guide beam manufacturing method further includes: The steel pad is assembled onto the two guide beam unit components; The steel pads machined and assembled on the two guide beam units meet the requirements.

8. A method for manufacturing a guide beam according to claim 7, characterized in that: The steel pads processed and assembled on the two guide beam unit components meet the requirements, specifically including: The steel pad located on one end face is milled to the forming size, and using this face as a reference face, the steel pads on the other three sides are milled to the forming size in sequence.

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