Round tube special-shaped structure assembly guidance and quality inspection method

Abstract

The invention provides an assembly guidance and quality inspection method for a circular tube type special-shaped structure. The method comprises the following steps: step 1, constructing a multi-angle sample plate drawing group for positioning a bracket of the circular tube type special-shaped structure on an AutoCad platform; the physical circular pipe special-shaped structure comprises a main pipe, first flange seats installed at the two ends of the main pipe, a plurality of bracket branch pipes installed on the side face of the main pipe, and second flange seats installed at the free ends of the bracket branch pipes. Secondly, positioning spot welding is conducted on the real corbel branch pipe and the real second flange base according to the sample plate drawing; step 3, placing a ground sample on the bracket branch pipe with the second flange seat according to the sample plate drawing; fourthly, dimension inspection is conducted, and the assembly precision is ensured; calculating the actual space inspection size of the bevel edge through the Pythagorean theorem; and 5, welding and fixing. And the workshop manufacturing production efficiency and the joint node quality of the circular tube type special-shaped structure bracket are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to an assembly guidance and quality inspection method for a circular tube-like special-shaped structure. Background Art

[0002] In the field of manufacturing of special-shaped structures such as round tubes, Figure 1 and Figure 2 As shown, there are significant defects in the production drawings in the prior art, which leads to low production efficiency in the workshop and difficulty in quality control. Specifically, it manifests as follows: 1. Lack of centerline measurement: The centerline of the special-shaped structure of the circular tube is a key benchmark, but there is a lack of operable measurement markings in the existing drawings, which makes it impossible for the riveter to accurately locate the axis of the component (such as the assembly position of the corbel), and can only rely on ground layout. However, the layout cannot be directly converted into the actual assembly benchmark, resulting in component docking deviation. 2. Omission of key inspection dimensions: The drawings do not clearly mark the dimensions that need to be inspected in actual production, resulting in a lack of quantitative standards in the quality inspection link. 3. Insufficient assembly guidance: The existing drawings mainly serve ground layout, and lack effective guidance for the spatial positioning of complex nodes such as corbels. It is difficult for workshop operators to understand the three-dimensional spatial relationship from two-dimensional drawings. Misreading the drawings often leads to problems such as blind cutting and node displacement, resulting in waste of work time and materials. The above defects lead to chain problems: 1. Increased risk of rework: Repeated adjustments are required during the pre-installation phase due to node positioning deviations, which prolongs the construction period and increases safety hazards in high-altitude operations; 2. High inspection costs: The lack of key dimensions forces quality inspection to rely on high-precision equipment such as total stations for point-by-point measurement, which is inefficient; 3. Poor process controllability: Special-shaped pipes have strict requirements on straightness and torsion, but traditional drawings cannot meet the needs of high-precision manufacturing. In summary, although some technologies have attempted to improve local accuracy through mold optimization or support devices, none of them have solved the constraints of systematic defects in drawings on the overall production process. Therefore, there is an urgent need for a method for marking drawings of special-shaped structures of round tubes that can integrate design, production and inspection needs to break through the bottleneck of existing technologies. Summary of the Invention

[0003] Based on this, the purpose of the present invention is to provide an assembly guidance and quality inspection method for circular tube-like special-shaped structures, which greatly improves the workshop production efficiency and joint node quality of circular tube-like special-shaped structure corbels.

[0004] The present invention provides a method for guiding the assembly and quality inspection of a circular tube-like special-shaped structure, comprising the following steps:

[0005] Step 1: Create a multi-angle template drawing set for positioning the circular tube special-shaped structure bracket on the AutoCad platform; the actual circular tube special-shaped structure includes a main tube, a first flange seat installed at both ends of the main tube, multiple bracket branch pipes installed on the side of the main tube, and a second flange seat installed at the free end of the bracket branch pipe;

[0006] The template group comprises a template A, a template B, a template C, a template D, a template E, a template F, a template G, a template H, and a template I;

[0007] Step two, positioning spot welding is performed on the real bracket support pipe and the real second flange seat according to the templates;

[0008] Step three, the bracket support pipe with the second flange seat is placed according to the templates;

[0009] Step four, dimensional inspection is performed to ensure assembly accuracy; the values of the positioning points in the corresponding positions in the template H and the template I are taken, and the actual space inspection dimension of the hypotenuse is calculated through the Pythagorean theorem;

[0010] Step five, welding and fixing; the two positions of the straight angle edge of the bracket support pipe are placed according to the dimensions given in the circular pipe special-shaped structure template, and the bracket support pipe with the second flange seat is directly placed at the position of the real sample and spot welded and fixed;

[0011] In the step one, the templates are divided into two groups, one group is used to assist in positioning and detecting the real position of the bracket support pipe, and the other group is used to assist in positioning and detecting the real position of the second flange seat;

[0012] The template A is set as a front local view reflecting the connection relationship of the main pipe, the first flange seat, the bracket support pipe, and the second flange seat;

[0013] The template B is set as a sectional view of the main pipe;

[0014] The template C is set as the same front local view as the template A;

[0015] The template D is set as a local view reflecting the actual length of the bracket support pipe through the flat placement position;

[0016] The template E is set as a front view separately reflecting the actual length of the bracket support pipe;

[0017] The template F is set as a top view separately reflecting the actual length of the bracket support pipe;

[0018] The template G is set as a sectional view of the second flange seat;

[0019] The template H is set as the same front local view as the template A;

[0020] The template I is set as a top view reflecting the connection relationship of the main pipe, the first flange seat, the bracket support pipe, and the second flange seat;

[0021] The step one, taking the sample drawing A, sample drawing B, sample drawing C, sample drawing D, sample drawing E, sample drawing F, sample drawing G for identification, to assist positioning and detecting the real position of the bracket branch pipe drawing, comprising the following steps:

[0022] S1, in the sample drawing A, the three positioning points of the main pipe are numbered, and the numbering is a#, b# and c#, respectively. The vertical distance between points a#, b# and c# and the upper end of the main pipe is marked;

[0023] S2, in the sample drawing B, the arc length distance between a#, b# and c# and the top point d# of the main pipe section is identified:

[0024] S3, in the sample drawing C, the vertical distance value between a#, b# and c# and the first flange seat is marked out;

[0025] S4, in the sample drawing D, the horizontal distance value of the bracket branch pipe to the main pipe is identified; in the sample drawing E, the horizontal length value of the bracket branch pipe is identified; in the sample drawing F, the horizontal length value of the bracket branch pipe is identified;

[0026] The step one, taking the sample drawing H and the sample drawing I for identification, to assist positioning and detecting the real position of the second flange seat, comprising the following steps:

[0027] S5, in the sample drawing H, the distance value between the lowest point of the first flange seat and the outer diameter of at least 4 positioning points of the bottom surface of the second flange seat is identified;

[0028] S6, in the sample drawing I, the vertical distance value between the outer diameter of at least 4 positioning points of the bottom surface of the second flange seat and the axis of the first flange seat is identified; the lowest point of the edge of the bottom surface of the first flange seat is identified, and the straight line distance from the four positioning points in S6 to the positioning point is identified respectively.

[0029] Preferably, the S1 comprises the following steps:

[0030] S1-1. In the second flange seat, draw an auxiliary line DP1 vertically through the axis C1 of the second flange seat, and the intersection points of the auxiliary line DP1 with the opposite sides of the second flange seat are auxiliary points WP5 and WP6, respectively. The distance between auxiliary points WP5 and WP6 is the outer diameter length of the bracket branch pipe;

[0031] S1-2. Draw a line L1 through the auxiliary point WP5 that is tangent to the outer side of the branch pipe, and mark the intersection point of the line L1 and the main pipe as a#; draw a line L2 through the auxiliary point WP6 that is tangent to the outer side of the branch pipe, and mark the intersection point of the line L2 and the main pipe as b#; mark the highest point of the connection between the branch pipe and the main pipe as c#;

[0032] S1-3. Mark the vertical distance between a# and the upper end of the main pipe, mark the vertical distance between b# and the upper end of the main pipe, and mark the vertical distance between c# and the upper end of the main pipe.

[0033] Preferably, the S2 comprises the following steps:

[0034] S2-1. Draw a center line C2 vertically through the axis of the main pipe on the template B, and mark the highest point where the outer circle of the main pipe intersects with C2 as d#;

[0035] S2-2. Mark the arc length corresponding to the vertical distance value on the outer diameter of the main pipe, starting from d#, and taking the vertical distance value between a# and the upper end of the main pipe, the vertical distance value between b# and the upper end of the main pipe, and the vertical distance value between c# and the upper end of the main pipe as the vertical distance value.

[0036] Preferably, the S3 comprises the following steps:

[0037] S3-1. Mark a#, b#, and c# according to the method of S1;

[0038] S3-2. Draw the axis C3 of the first flange seat, and mark the intersection point between C3 and the main pipe as e#;

[0039] S3-3. Mark the vertical distance value between e# and a#, the vertical distance value between e# and b#, and the vertical distance value between e# and c#.

[0040] Preferably, the S4 comprises the following steps:

[0041] S4-1. Mark the positions of the auxiliary point WP5 and the auxiliary point WP6 on the branch pipe;

[0042] S4-2. Measure the horizontal distance value from the auxiliary point WP5 and the auxiliary point WP6 to the main pipe, respectively, taking the auxiliary point WP5 and the auxiliary point WP6 as the starting points;

[0043] When the branch pipe needs to be fully penetrated and welded with the already grooved main pipe, take the horizontal distance between the auxiliary point WP5, the auxiliary point WP6, and the inner wall length of the main pipe;

[0044] When the bracket branch pipe is not fully penetrated welding, the horizontal distance between the auxiliary point WP5 and the outer surface of the main pipe is taken.

[0045] Preferably, the S5 comprises the following steps:

[0046] S5-1. Draw the second flange seat axis C4, draw two auxiliary lines through C4 on the second flange seat bottom surface, and the intersection of the two auxiliary lines through C4 and the side edge of the second flange seat bottom surface forms four positioning points, which are respectively marked as WP1, WP2, WP3, and WP4.

[0047] S5-2. Mark the lowest point of the first flange seat as WP, and mark the distance values between WP1, WP2, WP3, WP4 and WP respectively.

[0048] S5-3. Draw an extended auxiliary line horizontally through WP, and mark the vertical distance values of WP1, WP2, WP3, and WP4 to the extended auxiliary line through WP.

[0049] Preferably, the S6 comprises the following steps:

[0050] S6-1. Draw the first flange seat axis C5 and the second flange seat axis C6.

[0051] S6-2. Draw two auxiliary lines through C6 on the bottom surface of the second flange seat, and the intersection of the two auxiliary lines through C6 and the side edge of the second flange seat bottom surface forms four positioning points, which are respectively marked as WP1', WP2', WP3', and WP4'.

[0052] S6-3. Mark the vertical distance of the four positioning points to C5 respectively.

[0053] S6-4. Mark the straight line distance of the four positioning points to WP' respectively.

[0054] Preferably, in the second step, one of the center lines of the actual second flange seat is taken as a reference point, and the auxiliary point WP5 and the auxiliary point WP6 on the actual bracket branch pipe are positioned and welded.

[0055] Preferably, in the third step, the auxiliary point WP5 and the auxiliary point WP6 are taken as reference points.

[0056] Preferably, in the fourth step, the calculation error value range of the actual space test size is 0.1mm-0.5mm, which is the normal error value range; and in the fifth step, a temporary fixed support is installed in the bearing direction of the bracket branch pipe.

[0057] The beneficial effects of the present application are: greatly improving the workshop production efficiency and joint node quality of such circular pipe special-shaped structures, reducing the blind cutting in the production process and preventing the node displacement in the pre-assembly, thereby saving the working hours and other costs, facilitating quality inspection, reducing the measurement amount of the total station, greatly shortening the pre-assembly period and eliminating the potential safety risks caused by a large number of rework due to high-altitude operation. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 is a prior art front view.

[0059] Figure 2 is a prior art top view.

[0060] Figure 3 is a schematic view of the present application.

[0061] Figure 4 is a template A.

[0062] Figure 5 is a template B.

[0063] Figure 6 is a template C.

[0064] Figure 7 is a template D.

[0065] Figure 8 is a template E.

[0066] Figure 9 is a template F.

[0067] Figure 10 is a template G.

[0068] Figure 11 is a template H.

[0069] Figure 12 is a template I.

[0070] The reference signs are: main pipe 10, first flange seat 11, bracket support pipe 12, and second flange seat 13. DETAILED DESCRIPTION

[0071] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in combination with specific embodiments and drawings.

[0072] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "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 integrally connected; 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, or it can be connected inside 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.

[0073] Please refer to Figures 3-12 The present application provides a kind of round pipe special-shaped structure assembly guidance and quality inspection method, comprising the following steps:

[0074] Step one, build the multi-angle sample drawing group of round pipe special-shaped structure bracket for positioning on AutoCad platform;Physical round pipe special-shaped structure includes main pipe 10, first flange seat 11 installed at both ends of main pipe 10, multiple bracket branch pipes 12 installed at the side of main pipe 10, second flange seat 13 installed at the free end of bracket branch pipe 12;

[0075] The sample drawing group includes sample drawing A, sample drawing B, sample drawing C, sample drawing D, sample drawing E, sample drawing F, sample drawing G, sample drawing H and sample drawing I;

[0076] Step two, refer to sample drawing, and carry out positioning spot welding to physical bracket branch pipe and physical second flange seat;

[0077] Step three, the bracket branch pipe with second flange seat is placed according to sample drawing;

[0078] Step four, size inspection, to ensure assembly accuracy;The values of the positioning points in sample drawing H and sample drawing I are taken respectively, and the actual space inspection size of the hypotenuse is calculated by Pythagorean theorem;

[0079] Step five, welding fixation, the actual production can be placed according to the size given by the round pipe special-shaped structure sample drawing to give the bracket branch pipe one side right angle edge two orientation of the sample, and the bracket branch pipe with second flange seat is directly placed in the sample position and spot welded;

[0080] In the step one, the sample drawing is divided into two groups, one group is used to assist positioning and detecting the physical position of the bracket branch pipe 12, and the other group is used to assist positioning and detecting the physical position of the second flange seat 13;

[0081] The sample drawing A is set as a front view of the connection relationship of the main pipe 10, the first flange seat 11, the bracket branch pipe 12 and the second flange seat 13;

[0082] The sample drawing B is set as a cross-sectional view of the main pipe 10.

[0083] The template drawing C is set as the same front view as the template drawing A, avoiding affecting the normal reading of the construction personnel in the same drawing because of too much content;

[0084] The template drawing D is set as a partial view reflecting the full length of the corbel branch pipe 12 through the flat position, and the template drawing D also reflects the relationship between WP5 and WP6;

[0085] The template drawing E is set as a front view reflecting the full length of the corbel branch pipe 12 alone;

[0086] The template drawing F is set as a top view reflecting the full length of the corbel branch pipe 12 alone;

[0087] The template drawing G is set as a sectional view of the second flange base 13;

[0088] The template drawing H is set as the same front view as the template drawing A, avoiding affecting the normal reading of the construction personnel in the same drawing because of too much content;

[0089] The template drawing I is set as a top view embodying the connection relationship of the main pipe 10, the first flange base 11, the corbel branch pipe 12, and the second flange base 13;

[0090] In step one, the template drawings A, B, C, D, E, F, and G are taken for identification, which are used to assist in positioning and detecting the position of the corbel branch pipe 12 on the drawing, including the following steps:

[0091] S1, in the template drawing A, three positioning points of the main pipe 10 are numbered, numbered as a#, b#, and c#, and the vertical distance values between a#, b#, c# and the upper end of the main pipe 10 are identified;

[0092] S2, in the template drawing B, the arc length values between a#, b#, c# and the top vertex of the main pipe 10 are identified;

[0093] S3, in the template drawing C, the vertical distance values between a#, b#, c# and the first flange base 11 are identified;

[0094] S4, in the template drawing D, the horizontal distance value of the corbel branch pipe 12 to the main pipe 10 is identified; in the template drawing E, the horizontal length value of the corbel branch pipe 12 is identified; in the template drawing F, the horizontal length value of the corbel branch pipe 12 is identified;

[0095] The step one, taking the template drawing H and the template drawing I to identify, to assist positioning and detecting the second flange seat 13 real object position, including the following steps:

[0096] S5, in the template drawing H, identify the distance value between the lowest point of the first flange seat 11 and the outer diameter of the bottom surface of the second flange seat 13 at least 4 positioning points;

[0097] S6, in the template drawing I, identify the vertical distance value between the outer diameter of the bottom surface of the second flange seat 13 at least 4 positioning points and the axis of the first flange seat 11; identify the lowest point of the bottom surface edge of the first flange seat 11, and then identify the straight line distance from the 4 positioning points in S6 to the positioning point.

[0098] Preferably, the S1 includes the following steps:

[0099] S1-1. Draw an auxiliary line DP1 through the axis C1 of the second flange seat 13 close to the mounting end of the bracket branch pipe 12, the intersection points of the auxiliary line DP1 with the opposite sides of the second flange seat 13 are auxiliary points WP5 and WP6, and the distance between the auxiliary points WP5 and WP6 is the outer diameter length of the bracket branch pipe 12;

[0100] S1-2. Draw an auxiliary line L1 through the auxiliary point WP5 and close to the outer side of the bracket branch pipe 12 to obtain the intersection point a# with the side of the main pipe 10; draw an auxiliary line L2 through the auxiliary point WP6 and close to the outer side of the bracket branch pipe 12 to obtain the intersection point b# with the main pipe 10; identify c# as the highest point connecting the bracket branch pipe 12 and the main pipe 10;

[0101] S1-3. The vertical distance value between a# and the upper end of the main pipe 10 is 240mm, the vertical distance value between b# and the upper end of the main pipe 10 is 351mm, and the vertical distance value between c# and the upper end of the main pipe 10 is 171mm.

[0102] The S2 includes the following steps:

[0103] S2-1. Draw a center line C2 vertically through the axis of the main pipe 10 on the template drawing B, and identify d# as the highest point where the outer circle of the main pipe 10 intersects with C2;

[0104] S2-2. Take d# as the starting point, take 240mm, 351mm, 171mm as the vertical distance value, and mark the arc length value corresponding to the vertical distance value on the outer diameter of the main pipe 10 in sequence; mark the arc length value 356mm corresponding to 240mm, mark the arc length value 485mm corresponding to 351mm, and mark the arc length value 287mm corresponding to 171mm.

[0105] The S3 includes the following steps:

[0106] S3-1. Identify a#, b#, and c# according to the method of S1;

[0107] S3-2. Draw the axis C3 of the first flange seat 11, and mark the intersection point between C3 and the main pipe 10 as e#;

[0108] S3-3. Mark the vertical distance value between e# and a#, e# and b#, and e# and c# in sequence; the vertical distance value between e# and a# is 201mm; the vertical distance value between e# and b# is 489; and the vertical distance value between e# and c# is 356mm.

[0109] Preferably, the S4 includes the following steps:

[0110] S4-1. Mark the positions of auxiliary point WP5 and auxiliary point WP6 on the bracket branch pipe 12;

[0111] S4-2. Take auxiliary point WP5 and auxiliary point WP6 as the starting points respectively, and measure and mark the horizontal distance value from auxiliary point WP5 and auxiliary point WP6 to the main pipe 10;

[0112] When the bracket branch pipe 12 needs to be fully penetrated and welded with an opened groove, the horizontal distance between auxiliary point WP5, auxiliary point WP6 and the inner wall length of the main pipe is taken;

[0113] When the bracket branch pipe 12 is not fully penetrated and welded, the horizontal distance between auxiliary point WP5, auxiliary point WP6 and the outer surface of the main pipe is taken.

[0114] Preferably, the S5 includes the following steps:

[0115] S5-1. Draw the axis C4 of the second flange seat 13, draw two auxiliary lines penetrating C4 on the bottom surface of the second flange seat 13, and form four positioning points at the intersection of the two auxiliary lines penetrating C4 and the side edges of the bottom surface of the second flange seat 13, which are marked as WP1, WP2, WP3, and WP4 respectively;

[0116] S5-2. Identify the lowest point of the first flange seat 11 as WP, and identify the distance values between WP1, WP2, WP3, WP4 and WP respectively, to obtain the horizontal direction size of WP~WP1 as 311mm, and the hypotenuse size as 315mm; the horizontal direction size of WP~WP2 as 361mm, and the hypotenuse size as 382mm, the horizontal direction size of WP~WP3 as 548mm, and the hypotenuse size as 549mm, the horizontal direction size of WP~WP4 as 599mm, and the hypotenuse size as 614mm;

[0117] S5-3. Make an extension auxiliary line through WP horizontally, and identify the vertical distance values of WP1, WP2, WP3, WP4 to the extension auxiliary line of WP respectively, to obtain the vertical distance of WP extension auxiliary line~WP1 as 51mm, the vertical distance of WP extension auxiliary line~WP2 as 125mm, the vertical distance of WP extension auxiliary line~WP3 as 40mm, and the vertical distance of WP extension auxiliary line~WP4 as 137mm.

[0118] The S6 comprises the following steps:

[0119] S6-1. Draw the axis C5 of the first flange seat 11 and the axis C6 of the second flange seat 13;

[0120] S6-2. Draw two auxiliary lines through C6 on the bottom surface of the second flange seat 13, and the intersection points of the two auxiliary lines through C6 and the edge of the bottom surface of the second flange seat 13 form four positioning points, which are WP1', WP2', WP3', and WP4' respectively; or four vertical lines through WP1~WP4 on the bottom surface of the second flange seat 13 in the template H are drawn to obtain the four intersection points WP1', WP2', WP3', and WP4' of the four vertical lines and the edge of the bottom surface of the second flange seat 13.

[0121] S6-3. Identify the vertical distance of the four positioning points to C5 respectively, to obtain the vertical distance value of WP1'~C5 as 442mm, the vertical distance value of WP2'~C5 as 271mm, the vertical distance value of WP3'~C5 as 524mm, and the vertical distance value of WP4'~C5 as 353mm;

[0122] S6-4. Identify the lowest point of the edge of the bottom surface of the first flange seat as WP', and identify the straight line distance of the four positioning points to WP' respectively, to obtain the hypotenuse size of WP1'~WP' as 540mm, the hypotenuse size of WP2'~WP' as 451mm, the hypotenuse size of WP3'~WP' as 758mm, and the hypotenuse size of WP4'~WP' as 695mm. The horizontal direction size of WP~WP1'~WP4' is consistent with the template H.

[0123] When the need for inspection, respectively from the template H and template I in the corresponding position of the positioning point values, through the Pythagorean theorem a 2 +b 2 =c 2 The actual space inspection size of the hypotenuse is calculated, such as the actual space size of WP→WP4, taking the distance value of WP→WP4 in the template H 614, and taking the vertical distance value of WP4'→C5 in the template I 353 mm, through the formula: 614 2 +353 2 =708.2 2 ; The distance value of figure H corresponds to the base of a right triangle, and the vertical distance value of figure I corresponds to the height of the right triangle. These two values can only be checked on the ground sample. Then the actual inspection space size to be measured is equal to the length of the hypotenuse of the right triangle, 614 2 +353 2 =708.2 2 .

[0124] Take another set of data to check the accuracy, through the formula: take the vertical distance value of WP4'→WP' in the template I 695 mm, and take the vertical distance value of WP extended auxiliary line→WP4 in the template H 137 mm, through the formula: 695 2 +137 2 =708.4 2 , The error of the actual space inspection size is only 0.2 mm, and the error value range of the actual space inspection size is 0.1 mm-0.5 mm, which is the normal error value range, which meets the standard specification.

[0125] Subsequently, the space actual size of the other three positioning points can be calculated by the same method. With these size data, even if the component is separated from the mold, the correct assembly of the bracket can be checked with a tape measure without the help of a total station.

[0126] In step two, take the center line C7 of one of the holes of the second flange seat, and align the auxiliary points WP5 and WP6 on the bracket support pipe to perform positioning point welding.

[0127] In step three, the ground sample needs to be placed with auxiliary points WP5 and WP6 as reference points.

[0128] In step five, temporary fixed supports are installed in the load direction of the bracket support pipe to reduce labor intensity and ensure accurate positioning of the node.

[0129] The above embodiment only expresses one implementation of the present application, which is described in more detail and in more detail, but cannot be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method for guiding and inspecting the assembly of special-shaped circular tube structures, characterized by: The following steps are involved: Step 1: construct a multi-angle template drawing group for positioning a circular tube-like special-shaped structure bracket on the AutoCad platform; the actual circular tube-like special-shaped structure includes a main tube (10), a first flange seat (11) installed at both ends of the main tube (10), a plurality of bracket branches (12) installed on the side of the main tube (10), and a second flange seat (13) installed at the free end of the bracket branch (12); The sample drawing group includes sample drawing A, sample drawing B, sample drawing C, sample drawing D, sample drawing E, sample drawing F, sample drawing G, sample drawing H, and sample drawing I; Step 2: Refer to the sample drawing and spot weld the actual bracket branch pipe and the actual second flange seat; Step 3: Place the actual corbel branch pipe with the second flange seat according to the sample drawing; Step 4: Dimension inspection to ensure assembly accuracy; take the values ​​of the corresponding positioning points from the template drawings H and I respectively, and calculate the actual spatial inspection dimensions of the hypotenuse using the Pythagorean theorem; Step 5: Weld and fix. In actual production, you can make two samples of the right-angle side of the corbel branch according to the size given in the sample drawing of the round tube special-shaped structure, and directly put the corbel branch with the second flange seat into the position of the sample and spot weld it; In the step 1, the template drawings are divided into two groups, one group is used to assist in locating and detecting the physical position of the corbel branch pipe (12), and the other group is used to assist in locating and detecting the physical position of the second flange seat (13); The template drawing A is set as a front partial view showing the connection relationship between the main pipe (10), the first flange seat (11), the bracket branch pipe (12) and the second flange seat (13); The template B is set as a cross-sectional view of the main pipe (10); The template drawing C is set to be the same front partial view as the template drawing A; The template diagram D is set as a partial view reflecting the actual length of the corbel branch pipe (12) in a flat position; The template diagram E is set as a main view that reflects the actual length of the corbel branch pipe (12) alone; The template diagram F is set as a top view that reflects the actual length of the corbel branch pipe (12) alone; The template view G is set as a cross-sectional view of the second flange seat (13); The template image H is set to be the same front partial view as the template image A; The model diagram I is set as a top view showing the connection relationship between the main pipe (10), the first flange seat (11), the bracket branch pipe (12), and the second flange seat (13); In the step 1, sample drawing A, sample drawing B, sample drawing C, sample drawing D, sample drawing E, sample drawing F, and sample drawing G are marked to assist in locating and detecting the actual position of the corbel branch pipe (12), including the following steps: S1. In the sample diagram A, three positioning points of the main pipe (10) are numbered as a#, b#, and c#, and the vertical distances between points a#, b#, and c# and the upper end of the main pipe (10) are marked respectively; S2. Mark the arc length distances between a#, b#, c# and the vertex d# of the cross section of the main pipe (10) on the template B: S3. Mark the vertical distance values ​​between a#, b#, c# and the first flange seat (11) on the sample diagram C; S4, marking the horizontal distance value from the corbel branch pipe (12) to the main pipe (10) in the template diagram D; marking the horizontal length value of the corbel branch pipe (12) in the template diagram E; and marking the horizontal length value of the corbel branch pipe (12) in the template diagram F; In the step 1, the template diagram H and the template diagram I are taken for marking to assist in positioning and detecting the physical position of the second flange seat (13), including the following steps: S5. In the sample diagram H, mark the distance value between the lowest point of the first flange seat (11) and at least four positioning points on the outer diameter of the bottom surface of the second flange seat (13); S6. In the sample diagram I, mark the vertical distance values ​​between at least four positioning points on the outer diameter of the bottom surface of the second flange seat (13) and the axis of the first flange seat (11); mark the lowest point of the edge of the bottom surface of the first flange seat (11), and then mark the straight-line distances from the four positioning points in S6 to the positioning point.

2. The method for guiding and inspecting the assembly of a circular tube-shaped special-shaped structure according to claim 1, characterized in that: Said S1 comprises the following steps: S1-1. Draw an auxiliary line DP1 perpendicular to the axis C1 of the second flange seat (13) at the installation end of the second flange seat (13) close to the upper side of the corbel branch (12). The intersection points of the auxiliary line DP1 with the opposite sides of the side edge of the second flange seat (13) are marked as auxiliary points WP5 and WP6, respectively. The distance between the auxiliary points WP5 and WP6 is the outer diameter of the corbel branch (12); S1-2. Draw an auxiliary line L1 through the auxiliary point WP5 that is attached to the outer side of the corbel branch (12) and obtains the intersection with the side of the main pipe (10) as a#; draw an auxiliary line L2 through the auxiliary point WP6 that is attached to the outer side of the corbel branch (12) and obtains the intersection with the main pipe (10) as b#; mark the highest point where the corbel branch (12) is connected to the main pipe (10) as c#; S1-3. Identify the vertical distance value between a# and the upper end of the main pipe (10), identify the vertical distance value between b# and the upper end of the main pipe (10), and identify the vertical distance value between c# and the upper end of the main pipe (10).

3. The method for guiding and inspecting the assembly of a circular tube-shaped special-shaped structure according to claim 2, characterized in that: The S2 comprises the following steps: S2-1. Draw a vertical centerline C2 running through the axis of the main pipe (10) on the template B, and mark the highest point where the outer circle of the main pipe (10) intersects with C2 as d#; S2-2. Taking d# as the starting point, the vertical distance value between a# and the upper end of the main pipe (10), the vertical distance value between b# and the upper end of the main pipe (10), and the vertical distance value between c# and the upper end of the main pipe (10) as the vertical distance values, the arc length distance values ​​corresponding to the vertical distance values ​​are marked in sequence on the outer diameter of the main pipe (10).

4. The method for guiding and inspecting the assembly of a circular tube-shaped special-shaped structure according to claim 1, wherein: The S3 includes the following steps: S3-1. Identify a#, b#, and c# according to the method in S1; S3-2 draw the axis C3 of the first flange seat (11), the intersection between C3 and the main pipe (10) is marked as e #; S3-3. Identify the vertical distance values ​​between e# and a#, e# and b#, and e# and c# in sequence.

5. The method for guiding and inspecting the assembly of a circular tube-shaped special-shaped structure according to claim 2, wherein: The S4 comprises the following steps: S4-1. Mark the positions of auxiliary points WP5 and WP6 on the corbel branch (12); S4-2. Using auxiliary point WP5 and auxiliary point WP6 as starting points, measure the horizontal distance value from auxiliary point WP5 and auxiliary point WP6 to the main pipe (10); When the said bracket branch pipe (12) needs full penetration welding and has a groove, the horizontal distance between the auxiliary point WP5, the auxiliary point WP6 and the inner wall length of the main pipe is taken; When the bracket branch pipe (12) is not fully penetrated, the horizontal distance between the auxiliary point WP5, the auxiliary point WP6 and the outer surface of the main pipe is taken.

6. The method for guiding and inspecting the assembly of a circular tube-like special-shaped structure according to claim 2, wherein: The S5 comprises the following steps: S5-1. Draw the axis C4 of the second flange seat (13), draw two auxiliary lines passing through the C4 on the bottom surface of the second flange seat (13), and the intersection of the two auxiliary lines passing through the C4 and the side edges of the bottom surface of the second flange seat (13) to form four positioning points, which are respectively identified as WP1, WP2, WP3, and WP4; S5-2. The lowest point of the first flange seat (11) is identified as WP, and the distance values ​​between WP1, WP2, WP3, WP4 and WP are identified; S5-3. Draw an extension auxiliary line horizontally through WP and mark the vertical distance values ​​from WP1, WP2, WP3, and WP4 to the WP extension auxiliary line respectively.

7. The method for guiding and inspecting the assembly of a circular tube-shaped special-shaped structure according to claim 1, wherein: The S6 comprises the following steps: S6-1 draw the axis C5 of the first flange seat (11) and the axis C6 of the second flange seat (13); S6-2. Draw two auxiliary lines through the C6 on the bottom surface of the second flange seat (13). The intersection of the two auxiliary lines through the C6 and the side edges of the bottom surface of the second flange seat (13) forms four positioning points, which are respectively identified as WP1', WP2', WP3', and WP4'; S6-3. Identify the vertical distances from each of the four positioning points to C5. S6-4. Identify the lowest point of the bottom edge of the first flange seat (11) as WP', and identify the straight-line distances from the four positioning points to WP'.

8. The method for guiding and inspecting the assembly of a circular tube-shaped special-shaped structure according to claim 2, wherein: In the second step, randomly select one of the center lines of the hole of the second flange seat of the physical object, align it with the auxiliary points WP5 and WP6 on the physical corbel branch pipe, and perform positioning spot welding.

9. The method for guiding and inspecting the assembly of a circular tube-like special-shaped structure according to claim 1, characterized in that: In step 3, the ground sample needs to be laid out with auxiliary points WP5 and WP6 as reference points.

10. The method for guiding and inspecting the assembly of a circular tube-like special-shaped structure according to claim 1, characterized in that: In the step 4, the calculated error value range of the actual space inspection size is 0.1mm to 0.5mm, which is the normal error value range; in the step 5, a temporary fixed support is installed in the load-bearing direction of the corbel branch pipe.

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