Variable cross-section steel guardrail precision guarantee device and welding control method thereof

Abstract

The present application belongs to the technical field of bridge guardrail auxiliary device, especially relates to a variable cross-section steel guardrail precision guarantee device and a welding control method thereof. The precision guarantee device comprises a support plate assembly, a flange positioning frame and a longitudinal limiting plate. The support plate assembly is provided with a type groove which is matched with the longitudinal section side surface of the steel guardrail column surface. The flange positioning frame is fixed at one end of the support plate assembly. The longitudinal limiting plate is inserted between the flange positioning frame and the support plate assembly to temporarily replace the flange plate at the bottom of the steel guardrail, and is closely matched with the bottom end of the steel guardrail column surface. The longitudinal limiting plate is provided with a hand hole which is matched with the bottom end contour of the steel guardrail column surface. The present application is used to solve the problem that the manufacturing precision of the variable cross-section guardrail cannot meet the requirements.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge guardrail auxiliary devices, and particularly relates to a variable cross-section steel guardrail precision guarantee device and a welding control method thereof. BACKGROUND

[0002] As an important auxiliary facility of expressways, the bridge guardrail not only meets the anti-collision demand of traffic safety, but also gradually improves the demand of landscape modeling. The metal beam column type guardrail is recommended for bridge guardrails because it can be easily coordinated with the surrounding environment and has good landscape effects.

[0003] With the diversification of the structure of the steel guardrail, a hexagonal variable cross-section steel guardrail structure is also applied to large steel bridges. However, because there is no precedent for such a structure, the traditional manufacturing and assembly method cannot guarantee the manufacturing precision of the steel guardrail. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to overcome the shortcomings of the prior art and provide a variable cross-section steel guardrail precision guarantee device to solve the problem that the manufacturing precision of the variable cross-section guardrail cannot meet the requirements.

[0005] The technical solution for solving the above technical problem in the embodiments of the present application is as follows: a variable cross-section steel guardrail precision guarantee device comprises: a support plate assembly, a type groove being formed in the support plate assembly and being matched with the longitudinal section side surface of the column surface of the steel guardrail;

[0006] a flange positioning frame being fixed to one end of the support plate assembly;

[0007] a longitudinal limiting plate being inserted between the flange positioning frame and the support plate assembly to temporarily replace the flange plate at the bottom of the steel guardrail and being matched with the bottom end of the column surface of the steel guardrail, and a hand hole being formed in the longitudinal limiting plate and being matched with the contour of the bottom end of the column surface of the steel guardrail.

[0008] Further, a pressing device is arranged on one side of the support plate assembly, and the acting end of the pressing device is suspended above the type groove to press and position the steel guardrail.

[0009] Further, the pressing device comprises: a stand column being fixed to one side of the support plate assembly and having an insertion hole being formed therein;

[0010] a suspension rod being inserted into the insertion hole of the stand column;

[0011] a top pressing device being arranged on the suspension rod and the surface of the steel guardrail.

[0012] Further, the inner diameter of the hand hole is not less than the inner diameter of the contour of the bottom end of the column surface of the steel guardrail, and the inner diameter of the hand hole is not greater than the outer diameter of the contour of the bottom end of the column surface of the steel guardrail.

[0013] Further, the flange positioning frame is provided with positioning holes consistent with bolt holes on the flange plate at the bottom of the steel guardrail, and the positioning holes are matched with the dowel pins.

[0014] Further, the support plate assembly comprises a plurality of spaced lower support plates, and the lower support plates are cut according to different support profiles of the intersecting lines at different positions of the steel guardrail to form the forming groove.

[0015] The positioning gap matched with the bracket is formed between two adjacent lower support plates, and the rotation shaft for positioning the bracket is arranged on the lower support plate to tightly attach the bracket to the surface of the steel guardrail.

[0016] The embodiment also discloses a welding control method, which comprises the following steps:

[0017] The columnar parts are cut, and the columnar parts are positioned and welded after being limited in the forming groove to obtain the lower columnar part.

[0018] A plurality of inner stiffening plates are welded in the lower columnar part.

[0019] The bracket is positioned by the positioning gap of the lower support plate and the rotation shaft, and the bracket is welded on the lower columnar part.

[0020] The upper columnar part and the lower columnar part are closed, and the upper columnar part and the lower columnar part are positioned and welded after being compressed by the compression device.

[0021] The outer stiffening plates welded at both ends of the upper columnar part and the lower columnar part are welded.

[0022] The longitudinal limiting plate is taken out and welded after being positioned in the flange plate.

[0023] The steel guardrail is taken out, and all the welds are welded.

[0024] Further, the columnar parts are cut, and the columnar parts are positioned and welded after being limited in the forming groove.

[0025] The steel guardrail is longitudinally cut into the upper columnar part and the lower columnar part, and the columnar parts are cut and punched.

[0026] The columnar parts are limited in height in the forming groove, and the columnar parts are sequentially and tightly attached to the longitudinal limiting plate and the flange positioning frame for longitudinal limitation, and the assembled columnar parts are positioned and welded.

[0027] Further, the outer stiffening plates welded at both ends of the upper columnar part and the lower columnar part comprise:

[0028] The outer stiffening plates matching the contour of the bottom end of the steel guardrail are embedded into the inside of the bottom end of the steel guardrail from the hand hole on the longitudinal limiting plate, and the stiffening plates are fully welded from the hand hole.

[0029] Further, after cutting each cylindrical part, the cylindrical part is positioned in the limiting position and then positioning welding is performed, and before this, a steel guardrail cylindrical space shape mold is opened, and the rebound amount is corrected by determining the mold profile through pressure test;

[0030] The intersection contour of each lower support plate and the surface of the steel guardrail is calculated, and the support contour is formed by laser cutting at different positions of the lower support plate.

[0031] The one or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

[0032] 1. Low tooling cost, no additional investment in processing equipment is required;

[0033] 2. The structure design completely matches the cross section of the steel guardrail, the working condition is stable during tooling use, and the space multidirectional limiting is realized, which can effectively ensure the manufacturing precision;

[0034] 3. The precision control method has strong logic and is beneficial, and according to the method, rapid and efficient mass production of hexagonal variable cross section steel guardrails can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 It is a schematic diagram of the overall structure of the application.

[0037] Figure 2 It is a schematic diagram of the front view structure of the lower support plate in the application.

[0038] Figure 3 It is a schematic diagram of the front view structure of the longitudinal limiting plate in the application.

[0039] Figure 4 It is a schematic diagram of the front view structure of the flange positioning frame in the application.

[0040] Figure 5 It is a schematic diagram of the overall structure of the steel guardrail in the application.

[0041] REFERENCE SIGNS:

[0042] 1, lower cylinder; 2, upper cylinder; 3, inner stiffening plate; 4, outer stiffening plate; 5, flange plate; 6, bracket;

[0043] 7, lower support plate; 8, profiled groove; 9, flange positioning frame; 10, longitudinal limiting plate; 11, hand hole;

[0044] 12, pressing device; 13, stand column; 14, suspension rod; 15, pressing device;

[0045] 16, positioning hole; 17, positioning gap; 18, rotating shaft. DETAILED DESCRIPTION

[0046] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0047] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by the skilled in the art to which the present application belongs.

[0048] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0050] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] The variable cross-section steel guardrail generally comprises an upper column surface and a lower column surface and a flange plate, the upper column surface and the lower column surface are combined to form a column surface of the steel guardrail, the flange plate is fixed at the bottom end of the column surface, a plurality of inner stiffening plates supporting the inner wall of the column surface are connected between the upper column surface and the lower column surface, outer stiffening plates are further connected to the inner wall at both ends of the bottom end and the top end of the column surface, three or four brackets are spacedly welded on the surface of the lower column surface as the impact surface, and the welding precision of the steel guardrail cannot be guaranteed by using the traditional splicing assembly method.

[0052] Embodiment 1

[0053] As Figure 1 shown, the precision guarantee device for the variable cross-section steel guardrail comprises a support plate assembly, a flange positioning frame and a longitudinal limiting plate, a type groove matched with the longitudinal section side surface of the column surface of the steel guardrail is formed on the support plate assembly, and the support plate assembly and the flange positioning frame can be fixedly welded on an operating station.

[0054] The flange positioning frame is fixed at one end of the support plate assembly, and the longitudinal limiting plate is inserted between the flange positioning frame and the support plate assembly to temporarily replace the flange plate at the bottom of the steel guardrail and is closely matched with the bottom end of the column surface of the steel guardrail, a hand hole matched with the contour of the bottom end of the column surface of the steel guardrail is formed on the longitudinal limiting plate, the longitudinal limiting plate plays a role in limiting in the longitudinal direction, that is, in the horizontal direction, specifically, the longitudinal limiting plate abuts against the bottom end of the column surface of the steel guardrail, and the longitudinal limiting plate keeps consistent with the thickness of the flange plate to temporarily replace the flange plate to play a role in limiting, so that the longitudinal limiting plate is convenient to take out and insert the flange plate for welding use;

[0055] The hand hole formed on the longitudinal limiting plate can be used for welding operation on the inside of the bottom end of the steel guardrail.

[0056] Specifically, the inner diameter of the hand hole is not less than the inner diameter of the contour of the bottom end of the column surface of the steel guardrail, and the inner diameter of the hand hole is not greater than the outer diameter of the contour of the bottom end of the column surface of the steel guardrail, so as to ensure that the bottom ends of the upper column surface and the lower column surface after being combined can abut against the surface of the longitudinal limiting plate, and the contour inner diameter after being combined can be exposed, so as to facilitate the insertion of the stiffening plate through the hand hole and the full welding connection of one round.

[0057] Further, a pressing device is arranged on one side of the support plate assembly, and the acting end of the pressing device is suspended above the type groove to press and position the combined steel guardrail.

[0058] Specifically, the pressing device comprises a stand column, a suspension rod and a pressing device, the stand column is fixed on one side of the support plate assembly and is provided with an insertion hole, the suspension rod is inserted into the insertion hole of the stand column, and the pressing device is arranged between the suspension rod and the surface of the steel guardrail, the combined upper column surface and lower column surface are pressed by the reaction force between the pressing device and the suspension rod through the elongation of the pressing device, and the positioning welding without assembly gap on both sides is guaranteed.

[0059] The flange positioning frame is provided with positioning holes consistent with bolt holes on the flange plate at the bottom of the steel guardrail, and a punch pin is matched and inserted into the positioning holes.

[0060] The hole diameter and hole distance of the flange positioning frame are consistent with the hole diameter and hole distance of the flange plate, the punch pin is matched and inserted into the bolt holes of the flange positioning frame and the flange plate, the flange positioning is realized, and the welding and fixing of the flange plate are facilitated.

[0061] The support plate assembly comprises a plurality of spaced lower support plates, each two adjacent lower support plates are paired to form a lower support plate group, and the lower support plate group is provided with three groups or four groups according to the height of the steel guardrail, and the lower support plates are cut into different support contours according to the intersecting lines at different positions of the steel guardrail to form the profile groove.

[0062] A positioning gap matched with the bracket is formed between the two adjacent lower support plates, the positioning gap is consistent with the distance between the outer edges of the bracket, a rotating shaft for positioning the bracket is arranged on the lower support plate, the distance between the rotating shaft and the rotating shaft hole is equal to the distance between the bracket hole and the edge of the bracket, and the rotating shaft hole is arranged through the lower support plate and the bracket, the distance between the rotating shaft hole on the bracket and the edge of the bracket is consistent with the distance between the rotating shaft hole on the lower support plate and the top, and after the rotating shaft is inserted into the rotating shaft holes on the bracket and the lower support plate, the bracket can be closely attached to the surface of the steel guardrail, and subsequent welding and fixing are facilitated.

[0063] Embodiment 2

[0064] A welding control method is also disclosed in the embodiment, which comprises the following steps:

[0065] A mold is opened according to the space shape of the steel guardrail column surface, and the rebound amount is corrected by determining the pressure.

[0066] The intersecting line contour of each lower support plate and the surface of the steel guardrail is calculated, and the profile groove is formed by cutting the support contour on the lower support plate at different positions by using laser.

[0067] Specifically, since the lower support plate is arranged at the lower part of the steel guardrail, the cross section of the steel guardrail changes, and the lower support plate at different positions is calculated and laid out on the computer to ensure that the lower support plate is closely attached to the steel guardrail, and the contour of the lower support plate at different positions is cut by using laser cutting, so that the lower support plate is completely and closely attached to the steel guardrail.

[0068] Each column part is cut, the column part is positioned and welded after being limited in the profile groove to obtain a lower column surface.

[0069] Specifically, the cylindrical surface of the hexagonal variable cross-section steel guardrail is divided into an upper cylindrical surface and a lower cylindrical surface from the longitudinal direction, and the upper cylindrical surface and the lower cylindrical surface are separately punched and bent after being expanded and cut according to the actual cross-section to obtain a three-fold cylindrical surface part. Since the lower cylindrical surface has a large bending at the bottom impact surface, the two cylindrical surface parts are bent and then spliced and assembled, and then positioned and welded after being positioned in a type groove in the height direction and the longitudinal direction.

[0070] When the cylindrical surface part is put in, the longitudinal limiting plate is first placed in close contact with the flange positioning frame, and the cylindrical surface part is put in the type groove in close contact to limit the height direction. The cylindrical surface part is in close contact with the longitudinal limiting plate and the flange positioning frame in sequence to limit the longitudinal direction. The assembled cylindrical surface part is positioned and welded.

[0071] A plurality of inner stiffening plates are welded in the middle of the lower cylindrical surface. The inner stiffening plates are three hexagons with different cross-sectional sizes. After the positioning welding of the lower cylindrical surface is completed, the three inner stiffening plates are placed in the corresponding positions and welded to be stable. Since the lower cylindrical surface is the impact surface, the inner stiffening plates are fully welded to the lower cylindrical surface.

[0072] The positioning gap of the lower support plate is used in combination with the shaft positioning bracket, and the bracket is welded to the lower cylindrical surface.

[0073] Specifically, the distance between two adjacent lower support plates is consistent with the outer edge distance of the bracket, and the distance from each group of lower support plates to the longitudinal limiting plate is set according to the height from the bracket to the flange plate. A shaft is provided on the lower support plate, and a shaft hole is provided on the bracket and the lower support plate. The distance between the shaft and the shaft hole and the distance between the bracket hole and the steel guardrail are equal. The shaft is inserted into the shaft hole in the bracket after penetrating the lower support plate, and the bracket is positioned in the positioning gap between each group of lower support plates. At this time, the bracket is in close contact with the surface of the lower cylindrical surface, and then the bracket is welded and fixed.

[0074] The upper cylindrical surface and the lower cylindrical surface are closed, and the upper cylindrical surface and the lower cylindrical surface are positioned and welded after being pressed by the pressing device.

[0075] The outer stiffening plates connected at both ends of the upper cylindrical surface and the lower cylindrical surface are welded.

[0076] Specifically, the outer stiffening plate that fits the contour of the bottom end of the steel guardrail is inserted into the inside of the bottom end of the steel guardrail from the hand hole on the longitudinal limiting plate, and the stiffening plate is fully welded from the hand hole.

[0077] In addition, another outer stiffening plate is inserted into the inside of the top end of the steel guardrail. There is no obstruction here, and the outer stiffening plate can be fully welded around.

[0078] The longitudinal limiting plate is removed and inserted into the flange plate for welding.

[0079] Since the longitudinal limiting plate is consistent with the thickness of the flange plate to be welded, after the longitudinal limiting plate is taken out, the flange plate can be closely inserted, the hole diameter and hole distance of the flange positioning frame are consistent with the hole diameter and hole distance of the flange plate, the positioning block on the flange positioning frame is corresponded to the bolt hole on the flange plate, then the punch is used to penetrate the bolt hole of the flange positioning frame and the flange plate, the flange is positioned, and then welding is carried out.

[0080] The steel guard rail full-welded welds are taken out, specifically, the preliminarily formed steel guard rail is taken out from the lower support plate, and welding operation is performed on the welds, and a column cap is welded on the top of the steel guard rail.

[0081] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A welding control method of a variable cross-section steel guardrail, applied to a variable cross-section steel guardrail precision guarantee device, characterized by, The precision guarantee device of the variable cross-section steel guardrail comprises: a support plate assembly, a type groove being formed on the support plate assembly and being matched with the longitudinal section side surface of the surface of the steel guardrail column; a flange positioning frame being fixed to one end of the support plate assembly; a longitudinal limiting plate being inserted between the flange positioning frame and the support plate assembly, the longitudinal limiting plate being kept consistent with the thickness of the flange plate, and the longitudinal limiting plate being matched with the bottom end of the steel guardrail column, a hand hole being formed on the longitudinal limiting plate and being matched with the contour of the bottom end of the steel guardrail column, the inner diameter of the hand hole being not less than the inner diameter of the contour of the bottom end of the steel guardrail column, and the inner diameter of the hand hole being not greater than the outer diameter of the contour of the bottom end of the steel guardrail column; a pressing device being arranged on one side of the support plate assembly, the acting end of the pressing device being suspended above the type groove, and the steel guardrail being pressed and positioned by the pressing device; the support plate assembly comprises a plurality of spaced lower support plates, the lower support plates being cut by different support contours according to the intersection lines at different positions of the steel guardrail to form the type groove; a positioning gap being formed between the adjacent two lower support plates and being matched with the bracket, a rotating shaft being arranged on the lower support plate to position the bracket, and the bracket being matched with the surface of the steel guardrail; the welding control method of the variable cross-section steel guardrail comprises the following steps: cutting to obtain each column part, positioning welding after the column part is limited in the type groove to obtain a lower column; a plurality of inner stiffening plates are welded at intervals in the lower column; the bracket is positioned by the positioning gap of the lower support plate and the rotating shaft, and the bracket is welded on the lower column; the upper column and the lower column are combined, and the upper column and the lower column are positioned after being pressed by the pressing device; outer stiffening plates are welded at both ends of the upper column and the lower column, specifically, the outer stiffening plates matched with the contour of the bottom end of the steel guardrail are embedded into the inside of the bottom end of the steel guardrail from the hand hole of the longitudinal limiting plate, and the stiffening plates are fully welded from the hand hole; the longitudinal limiting plate is taken out, and the flange plate is positioned and welded after being inserted; the steel guardrail is taken out, and each weld is fully welded.

2. The welding control method of claim 1, wherein, the pressing device comprises: a stand being fixed to one side of the support plate assembly, an insertion hole being formed on the stand; a suspension rod being arranged in the insertion hole of the stand; a top pressing device being arranged between the suspension rod and the surface of the steel guardrail.

3. The welding control method of claim 1, wherein, a positioning hole being formed on the flange positioning frame and being consistent with the bolt hole of the flange plate of the steel guardrail, a punch being matched and inserted in the positioning hole.

4. The welding control method of claim 1, wherein, the cutting to obtain each column part, positioning welding after the column part is limited in the type groove comprises: the steel guardrail is longitudinally divided into an upper column and a lower column, each column part is cut and punched; the column part is put into the type groove for height limiting, the column part is sequentially matched with the longitudinal limiting plate and the flange positioning frame for longitudinal limiting, and the assembled column part is positioned and welded.

5. The welding control method of claim 4, wherein, before the cutting to obtain each column part, positioning welding after the column part is limited in the type groove, the following steps are further included: a mold is opened according to the spatial shape of the column of the steel guardrail, and the rebound amount is corrected by trial pressing to correct the contour of the mold; the intersection line contour of each lower support plate and the surface of the steel guardrail is calculated, and the type groove is formed by cutting the support contour on the lower support plate at different positions by using a laser.

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