Three-dimensional elbow pipe space position detection tool and detection method

Abstract

The application discloses a three-dimensional elbow spatial position detection tool and a detection method. The detection tool comprises a bottom plate. A plurality of detection assemblies are detachably arranged on the bottom plate and are used for detecting three-dimensional elbows with different structures. The three-dimensional elbow has a first end and a second end. The detection assembly comprises a first positioning member which is detachably arranged on the bottom plate and is used for positioning the first end. At least one second positioning member is detachably arranged on the bottom plate at a preset angle and is used for positioning the pipe body of the three-dimensional elbow. A detection member is detachably arranged on the bottom plate at a preset angle and is used for detecting the axial direction of the second end and detecting the spatial position of the end face of the second end. The detection assemblies of various three-dimensional elbows are integrated on the bottom plate in a detachable positioning assembly mode, the operation is convenient, the detection is accurate, and the connection of two interfaces is ensured.

Description

Technical Field

[0001] This invention relates to the field of parts inspection technology, and in particular to a three-dimensional bending pipe spatial position detection fixture and inspection method. Background Technology

[0002] Three-dimensional pipe bending (such as) Figure 1 The image shows a type of three-dimensional bend, featuring a multi-planar, multi-angle three-dimensional structure used for connecting two interfaces in a specific spatial structure. The straight sections of the three-dimensional bend typically have large design clearances with other parts within the installation space, resulting in a low possibility of interference and thus generally lower control precision. The arc sections of the bend are not precision-machined, and their design clearances are even larger, therefore, arc sections are typically subject to less stringent control. The structural characteristics of a three-dimensional bend require accurate positioning and orientation at both ends to ensure the successful assembly and connection of the two interfaces in the spatial structure. To meet the connection requirements of interfaces in different locations, the structures of three-dimensional bends vary considerably. Therefore, a spatial position detection fixture and method for three-dimensional bends are designed to meet the detection needs of various structural three-dimensional bends and ensure the successful connection of interfaces. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the existing technology, it is desirable to provide a three-dimensional pipe bending spatial position detection fixture and detection method, which integrates various three-dimensional pipe bending detection components into a base plate in a detachable positioning assembly method, making operation convenient, detection accurate, and ensuring the connection of the two interfaces.

[0004] This invention provides a three-dimensional curved pipe spatial position detection fixture, including a base plate; the base plate is detachably equipped with several detection components, which are used to detect three-dimensional curved pipes of different structures, the three-dimensional curved pipes having opposing first and second ends; the detection components include: The first positioning element is detachably mounted on the base plate and is used to position the first end. At least one second positioning element is provided, which is detachably mounted on the base plate at a preset angle, for positioning the tube body of the three-dimensional curved tube; The detection component is detachably mounted on the base plate at a preset angle, and is used to detect the axial direction of the second end and the spatial position of the end face of the second end.

[0005] Furthermore, the first positioning component includes a first positioning shaft; a first insertion post is coaxially provided at the bottom end of the first positioning shaft, and a first insertion hole is provided on the base plate corresponding to the first insertion post; a positioning hole or positioning pin is coaxially provided at the top end of the first positioning shaft, the inner diameter of the positioning hole is clearance-fitted with the outer diameter of the first end, and the outer diameter of the positioning pin is clearance-fitted with the inner diameter of the first end.

[0006] Furthermore, the second positioning component includes a second positioning shaft; a second insertion post is coaxially provided at the bottom end of the second positioning shaft, and a positioning plane is provided on one side of the second insertion post, making its cross-section D-shaped; a second insertion hole is provided on the base plate corresponding to the second insertion post; a first positioning groove is provided at the top end of the second positioning shaft at a preset angle, and the width of the first positioning groove is clearance-fitted with the outer diameter of the three-dimensional bent pipe.

[0007] Furthermore, a machining reference plane is provided on one side of the second positioning axis, making its cross-section D-shaped.

[0008] Furthermore, the detection component includes a detection shaft; a third insertion post is coaxially arranged at the bottom end of the detection shaft, and a positioning plane is provided on one side of the third insertion post, making its cross-section D-shaped; a third insertion hole is opened on the base plate corresponding to the third insertion post; a second positioning groove is opened on the top surface of the detection shaft at a preset angle, the width of the second positioning groove is clearance-fitted with the outer diameter of the second end, a first detection plane is provided on one side of the second positioning groove, and a second detection plane parallel to the first detection plane is provided on the other side, and the end face of the second end is located between the first detection plane and the second detection plane, then the spatial position of the end face of the second end is qualified.

[0009] Furthermore, a machining reference plane is provided on one side of the detection shaft, making its cross-section D-shaped.

[0010] Furthermore, the detection component includes an inverted T-shaped detection seat; first pin holes are respectively provided on both sides of the detection seat, and a second pin hole is opened on the base plate corresponding to the first pin holes; a positioning pin is provided in the first pin hole, and the bottom end of the positioning pin is inserted into the corresponding second pin hole; a through hole is opened on the detection seat corresponding to the second end, and a detection pin passes through the through hole with clearance fit, and one end of the detection pin is inserted into the second end with clearance fit; A C-shaped detection card is fitted on the detection pin between the second end and the detection seat. The detection card includes a first detection card and a second detection card with different thicknesses. When the first detection card can be inserted between the second end and the detection seat, and the second detection card cannot be inserted between the second end and the detection seat, the spatial position of the second end face is qualified.

[0011] Furthermore, the present invention also provides a detection method using the above-mentioned three-dimensional curved pipe spatial position detection fixture, comprising the following steps: 1) Select the appropriate detection component based on the three-dimensional bend to be detected, and install it on the base plate; 2) Position the first end of the three-dimensional bend using the first positioning component; 3) Position the pipe body of the three-dimensional bend using the second positioning component; 4) The axial direction of the second end of the three-dimensional bend is detected by the testing component, and the spatial position of the end face of the second end is detected to see if it meets the design requirements.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention integrates various 3D pipe bending detection components onto a single base plate using a detachable positioning assembly method. When a 3D pipe to be inspected is received, a suitable detection component is first selected based on its structural characteristics and then placed on the base plate. The spatial position of the 3D pipe is then detected using the detection component. Multiple 3D pipes can be inspected on a single base plate, making operation convenient and accurate, ensuring that qualified 3D pipes can achieve connection at both interfaces.

[0013] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0014] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A schematic diagram of a structural embodiment of a three-dimensional bent pipe; Figure 2 This is a schematic diagram of the testing fixture. Figure 3 This is a structural schematic diagram of one embodiment of the detection component (the base plate structure is simplified for ease of understanding). Figure 4 An exploded structural diagram of one embodiment of the detection component; Figure 5 A schematic diagram of one embodiment of a three-dimensional bent pipe mounted on a detection assembly; Figure 6 A top view of one embodiment of the testing component; Figure 7 This is a schematic diagram of another embodiment of the detection component; Figure 8 This is a schematic diagram of the structure of various three-dimensional bends installed on corresponding detection components (some detection components may interfere with each other in the view, but since only one set of detection components is installed in actual application, the interference in the view does not affect the actual application).

[0015] The diagram labels are: 1. Base plate; 2. Detection component; 3. Three-dimensional pipe bend. 11. First connector; 12. Second connector; 13. Third connector; 21. First positioning component; 22. Second positioning component; 23. Inspection component; 211. First positioning shaft; 212. First insertion post; 213. Positioning hole; 221. Second positioning shaft; 222. Second insertion post; 223. First positioning groove; 231. Detection shaft; 232. Third insertion post; 233. Second positioning groove; 234. First detection plane; 235. Second detection plane; 236. Detection seat; 237. Positioning pin; 238. Detection pin; 239. Detection card; 31. First end; 32. Second end; 33. Pipe body. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Please refer to Figures 1-8 An embodiment of the present invention provides a three-dimensional curved pipe spatial position detection fixture, including a base plate 1; a plurality of detection components 2 are detachably disposed on the base plate 1, respectively used for detecting three-dimensional curved pipes 3 with different structures, the three-dimensional curved pipes 3 having opposing first ends 31 and second ends 32; the detection components 2 include: The first positioning component 21 is detachably mounted on the base plate 1 and is used to position the first end 31. At least one second positioning element 22 is detachably mounted on the base plate 1 at a preset angle for positioning the tube body 33 of the three-dimensional bent tube 3. The detection component 23 is detachably mounted on the base plate 1 at a preset angle, and is used to detect the axial direction of the second end 32 and the spatial position of the end face of the second end 32.

[0019] In this embodiment, when inspecting the three-dimensional curved pipe 3, a suitable inspection component 2 is first selected according to its structural characteristics and then placed on the base plate 1; then the first end 31 of the three-dimensional curved pipe 3 is positioned by the first positioning component 21, and the pipe body 33 of the three-dimensional curved pipe 3 is positioned by the second positioning component 22; finally, the axial direction of the second end 32 of the three-dimensional curved pipe 3 is inspected by the inspection component 23, and the spatial position of the end face of the second end 32 is inspected.

[0020] This application integrates the detection components 2 of various three-dimensional pipe bends 3 into a base plate 1 using a detachable positioning assembly method. The detection of various three-dimensional pipe bends 3 can be completed on a single base plate 1, which is convenient to operate and accurate in detection, ensuring that the qualified three-dimensional pipe bends 3 can achieve the connection of two interfaces.

[0021] In a preferred embodiment, such as Figure 4 and Figure 5 As shown, the first positioning component 21 includes a first positioning shaft 211; a first insertion post 212 is coaxially provided at the bottom end of the first positioning shaft 211, and a first insertion hole 11 is provided on the base plate 1 corresponding to the first insertion post 212; a positioning hole 213 or a positioning pin is coaxially provided at the top end of the first positioning shaft 211, the inner diameter of the positioning hole 213 is clearance-fitted with the outer diameter of the first end 31, and the outer diameter of the positioning pin is clearance-fitted with the inner diameter of the first end 31.

[0022] In this embodiment, based on the structural features of the first end 31 of the three-dimensional curved pipe 3, a suitable positioning hole 213 or positioning pin is selected for positioning. The first end 31 is inserted into the positioning hole 213 or the positioning pin is inserted into the first end 31. The operation is convenient and the positioning is accurate, ensuring the accuracy of the detection.

[0023] In a preferred embodiment, such as Figure 4 and Figure 5 As shown, the second positioning component 22 includes a second positioning shaft 221; a second insertion post 222 is coaxially arranged at the bottom end of the second positioning shaft 221, and a positioning plane is provided on one side of the second insertion post 222, making its cross-section D-shaped; a second insertion hole 12 is opened on the base plate 1 corresponding to the second insertion post 222; a first positioning groove 223 is opened at the top end of the second positioning shaft 221 at a preset angle, and the width of the first positioning groove 223 is clearance-fitted with the outer diameter of the tube body 33 of the three-dimensional bent tube 3.

[0024] In this embodiment, while positioning the first end 31, the tube body 33 is embedded into the first positioning groove 223 at the top of the second positioning shaft 221 to achieve positioning of the tube body 33. Based on the length of the three-dimensional curved tube 3, 1-3 second positioning shafts 221 are selected from the detection assembly 2 to meet the positioning requirements of the tube body 33, ensuring convenient installation and accurate positioning.

[0025] The second insertion post 222 at the bottom of the second positioning shaft 221 adopts a D-shaped structure, which realizes the angular positioning of the second positioning shaft 221 with fewer structural features, making it easy to process and accurate in positioning.

[0026] In a preferred embodiment, such as Figure 4 and Figure 5 As shown, a machining reference plane is provided on one side of the second positioning shaft 221, making its cross-section D-shaped. The second positioning shaft 221 is clamped and fixed by the machining reference plane. The positioning plane of the second insertion post 222 and the first positioning groove 223 are machined with reference to ensure the accuracy of the angular relationship between the two structural features.

[0027] In a preferred embodiment, such as Figure 4 and Figure 5 As shown, the detection component 23 includes a detection shaft 231; a third insertion post 232 is coaxially arranged at the bottom end of the detection shaft 231, and a positioning plane is provided on one side of the third insertion post 232, making its cross-section D-shaped; a third insertion hole 13 is opened on the base plate 1 corresponding to the third insertion post 232; a second positioning groove 233 is opened on the top surface of the detection shaft 231 at a preset angle, the width of the second positioning groove 233 is clearance-fitted with the outer diameter of the second end 32, a first detection plane 234 is provided on one side of the second positioning groove 233, and a second detection plane 235 parallel to the first detection plane 234 is provided on the other side. When the end face of the second end 32 is located between the first detection plane 234 and the second detection plane 235, the spatial position of the end face of the second end 32 is qualified.

[0028] In this embodiment, after the first end 31 and the body 33 of the three-dimensional bent pipe 3 are positioned, it is first checked whether the second end 32 can be inserted. If it can, its angular orientation is qualified; otherwise, it is unqualified. After the angular orientation of the second end 32 is qualified, it is further checked whether its end face is located between the first detection plane 234 and the second detection plane 235. If so, its spatial position is qualified; otherwise, it is unqualified. If both the angular orientation and spatial position are qualified, the three-dimensional bent pipe 3 is qualified; if either one is unqualified, the three-dimensional bent pipe 3 is unqualified.

[0029] The third insertion post 232 at the bottom of the detection shaft 231 adopts a D-shaped structure, which realizes the angular positioning of the detection shaft 231 with fewer structural features, making it easy to process and accurate in positioning.

[0030] The position of the first detection plane 234 is the design spatial position of the second end 32 face minus the maximum tolerance, and the position of the second detection plane 235 is the design spatial position of the second end 32 face plus the maximum tolerance; the detection results are intuitive and accurate, and the detection operation is convenient.

[0031] In a preferred embodiment, such as Figure 4 and Figure 5 As shown, a machining reference plane is provided on one side of the detection shaft 231, making its cross-section D-shaped. The detection shaft 231 is clamped and fixed by the machining reference plane, and the positioning plane of the third plug post 232, as well as the second positioning groove 233, the first detection plane 234 and the second detection plane 235 are machined with reference to ensure the accuracy of the angular relationship between the various structural features.

[0032] In a preferred embodiment, such as Figure 2 and Figure 7 As shown, the detection component 23 includes an inverted T-shaped detection seat 236; first pin holes are respectively provided on both sides of the detection seat 236, and a second pin hole is opened on the base plate 1 corresponding to the first pin holes; a positioning pin 237 is provided in the first pin hole, and the bottom end of the positioning pin 237 is inserted into the corresponding second pin hole; a through hole is opened on the detection seat 236 corresponding to the second end 32, and a detection pin 238 passes through the through hole with clearance fit, and one end of the detection pin 238 is inserted into the second end 32 with clearance fit; A C-shaped detection card 239 is fitted on the detection pin 238 between the second end 32 and the detection seat 236. The detection card 239 includes a first detection card and a second detection card with different thicknesses. When the first detection card can be inserted between the second end 32 and the detection seat 236, and the second detection card cannot be inserted between the second end 32 and the detection seat 236, the spatial position of the end face of the second end 32 is qualified.

[0033] In this embodiment, the detection seat 236 is positioned and installed on the base plate 1 by the positioning pin 237; if the detection pin 238 can pass through the through hole and be inserted into the second end 32, then its angular orientation is qualified; otherwise, it is unqualified. The gap between the designed spatial position of the second end 32 and the detection seat 236 is set as D, and the tolerance of the spatial position of the second end 32 is ±d; the thickness of the first detection card is Dd, and the thickness of the second detection card is D+d; if the first detection card can be inserted between the second end 32 and the detection seat 236, and the second detection card cannot be inserted between the second end 32 and the detection seat 236, then the spatial position of the second end 32 is qualified; otherwise, it is unqualified. The operation is convenient, and the test results are intuitive and accurate.

[0034] Furthermore, embodiments of the present invention also provide a detection method using the above-described three-dimensional pipe bending spatial position detection fixture, comprising the following steps: 1) Select the appropriate detection component 2 according to the three-dimensional curved pipe 3 to be detected, and install it on the base plate 1; 2) The first end 31 of the three-dimensional curved pipe 3 is positioned by the first positioning component 21; 3) The pipe body 33 of the three-dimensional bend 3 is positioned by the second positioning element 22; 4) The axial direction of the second end 32 of the three-dimensional bend 3 is detected by the detection component 23, and the spatial position of the end face of the second end 32 is detected to see if it meets the design requirements.

[0035] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A three-dimensional pipe bending spatial position detection fixture, characterized in that, Includes a base plate (1); several detection components (2) are detachably mounted on the base plate (1), respectively used to detect three-dimensional bent pipes (3) with different structures, the three-dimensional bent pipes (3) having a first end (31) and a second end (32) opposite to each other; the detection components (2) include: The first positioning element (21) is detachably mounted on the base plate (1) and is used to position the first end (31); At least one second positioning element (22) is detachably mounted on the base plate (1) at a preset angle for positioning the tube body (33) of the three-dimensional curved tube (3); The detection component (23) is detachably mounted on the base plate (1) at a preset angle, and is used to detect the axial direction of the second end (32) and the spatial position of the end face of the second end (32).

2. The three-dimensional pipe bending spatial position detection fixture according to claim 1, characterized in that, The first positioning component (21) includes a first positioning shaft (211); a first insertion post (212) is coaxially provided at the bottom end of the first positioning shaft (211), and a first insertion hole (11) is provided on the base plate (1) corresponding to the first insertion post (212); a positioning hole (213) or a positioning pin is coaxially provided at the top end of the first positioning shaft (211), the inner diameter of the positioning hole (213) is clearance-fitted with the outer diameter of the first end (31), and the outer diameter of the positioning pin is clearance-fitted with the inner diameter of the first end (31).

3. The three-dimensional pipe bending spatial position detection fixture according to claim 1, characterized in that, The second positioning component (22) includes a second positioning shaft (221); a second insertion post (222) is coaxially provided at the bottom end of the second positioning shaft (221), and a positioning plane is provided on one side of the second insertion post (222) so that its cross-section is D-shaped; a second insertion hole (12) is provided on the base plate (1) corresponding to the second insertion post (222); a first positioning groove (223) is provided at the top end of the second positioning shaft (221) at a preset angle, and the width of the first positioning groove (223) is clearance-fitted with the outer diameter of the tube body (33) of the three-dimensional bent tube (3).

4. The three-dimensional pipe bending spatial position detection fixture according to claim 3, characterized in that, The second positioning shaft (221) has a machining reference plane on one side, so that its cross-section is D-shaped.

5. The three-dimensional pipe bending spatial position detection fixture according to claim 1, characterized in that, The detection component (23) includes a detection shaft (231); a third insertion post (232) is coaxially provided at the bottom end of the detection shaft (231), and a positioning plane is provided on one side of the third insertion post (232) so that its cross-section is D-shaped; a third insertion hole (13) is provided on the base plate (1) corresponding to the third insertion post (232); a second positioning groove (233) is provided on the top surface of the detection shaft (231) at a preset angle, the width of the second positioning groove (233) is clearance-fitted with the outer diameter of the second end (32), a first detection plane (234) is provided on one side of the second positioning groove (233), and a second detection plane (235) parallel to the first detection plane (234) is provided on the other side. If the end face of the second end (32) is located between the first detection plane (234) and the second detection plane (235), then the spatial position of the end face of the second end (32) is qualified.

6. The three-dimensional pipe bending spatial position detection fixture according to claim 5, characterized in that, A machining reference plane is provided on one side of the detection shaft (231), so that its cross-section is D-shaped.

7. The three-dimensional pipe bending spatial position detection fixture according to claim 1, characterized in that, The detection component (23) includes an inverted T-shaped detection seat (236); the detection seat (236) has first pin holes on both sides, and the base plate (1) has a second pin hole corresponding to the first pin hole; a positioning pin (237) is provided in the first pin hole, and the bottom end of the positioning pin (237) is inserted into the corresponding second pin hole; the detection seat (236) has a through hole corresponding to the second end (32), and a detection pin (238) passes through the through hole with clearance fit, and one end of the detection pin (238) is inserted into the second end (32) with clearance fit; A C-shaped detection card (239) is fitted on the detection pin (238) between the second end (32) and the detection seat (236). The detection card (239) includes a first detection card and a second detection card with different thicknesses. When the first detection card can be inserted between the second end (32) and the detection seat (236), and the second detection card cannot be inserted between the second end (32) and the detection seat (236), the spatial position of the end face of the second end (32) is qualified.

8. A detection method using the three-dimensional curved pipe spatial position detection fixture according to any one of claims 1-7, characterized in that, The steps include the following: 1) Select the appropriate detection component (2) according to the three-dimensional curved pipe (3) to be detected, and install it on the base plate (1); 2) The first end (31) of the three-dimensional curved pipe (3) is positioned by the first positioning component (21); 3) Position the tube body (33) of the three-dimensional curved tube (3) using the second positioning component (22); 4) The axial direction of the second end (32) of the three-dimensional bend (3) is detected by the detection component (23), and the spatial position of the end face of the second end (32) is detected to see if it meets the design requirements.

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