A fixture for pre-weld positioning and post-weld verification of a standard tube

Abstract

The utility model relates to the technical field of machining manufacturing, specifically is a kind of tool for standard pipe positioning before welding and verification after welding, including bottom plate, support column and pressing plate, the bottom of the main body of workpiece to be processed is detachably connected on bottom plate, support column is set below standard pipe, the bottom of support column is detachably connected on bottom plate, the top of support column is provided with the standard pipe placing groove matched with the standard pipe appearance and welding installation position of workpiece to be processed, and the top of support column is detachably fixedly connected with the pressing plate for compacting standard pipe. The tool for standard pipe positioning before welding and verification after welding can accurately constrain standard pipe position before welding, facilitate welding operator to position quickly, and can also check standard pipe center to datum plane size after welding, provide basis for post-welding straightening, facilitate operator to load and unload, improve welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing and manufacturing technology, specifically to a tooling for positioning standard pipes before welding and verifying them after welding. Background Technology

[0002] With the rapid development and widespread adoption of automation and intelligent manufacturing, the demands for product structures across various industries are becoming increasingly diversified, and the requirements for product dimensional accuracy are continuously rising. In the field of mechanical manufacturing, the structure of standard tubes welded to the side walls of parts is very common, such as... Figure 1 As shown, the side wall of the main body 610 of the workpiece 6 to be processed is welded with several standard tubes 620. However, due to the special nature of this structure, it is difficult to ensure the high-precision dimension from the center of the standard tube to the reference surface by the traditional method of "pre-welding allowance + post-welding machining".

[0003] Relying solely on welding to ensure dimensional accuracy presents numerous challenges in practice. Firstly, pre-welding positioning has limitations; relying solely on a clamping station cannot accurately calibrate the distance from the standard tube's center to the reference plane, leading to inaccurate positioning and potential defects in subsequent welding quality. Secondly, during welding, the standard tube is connected to the sidewall via welding, subjecting it to an uneven temperature field. This uneven temperature field generates thermal stress at the weld joint, causing a shift in the tube's center position relative to the reference plane, further affecting welding accuracy.

[0004] Meanwhile, post-weld inspection also presents challenges. Due to a lack of effective inspection methods, it is impossible to accurately measure the relevant dimensions of the standard pipe center, resulting in a lack of reliable basis for post-weld straightening and making it difficult to ensure that the welding quality meets design requirements. Furthermore, traditional standard positioning fixtures are cumbersome to install and remove, making on-site operation difficult, consuming significant time and manpower, and reducing welding efficiency, failing to meet the demands of modern machinery manufacturing for efficient and precise production.

[0005] Therefore, developing a tooling for pre-welding positioning and post-welding inspection of standard pipes is of great practical significance. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a fixture for pre-weld positioning and post-weld verification of standard pipes. This fixture can accurately constrain the position of the standard pipe before welding, facilitating rapid positioning by the welding operator, and can also verify the dimension from the center of the standard pipe to the reference surface after welding, providing a basis for post-weld straightening, facilitating loading and unloading by the operator, and improving welding efficiency.

[0007] The technical solution of this utility model is as follows: A tooling for pre-welding positioning and post-welding verification of standard pipes includes a base plate, a support column, and a pressure plate. The bottom of the main body of the workpiece to be processed is detachably connected to the base plate. The support column is located below the standard pipe, and its bottom is detachably connected to the base plate. The top of the support column is provided with a standard pipe placement groove that matches the shape of the standard pipe and the welding installation position of the workpiece to be processed. The top of the support column is detachably fixedly connected to a pressure plate for pressing the standard pipe.

[0008] Furthermore, a central hole is provided in the center of the base plate.

[0009] Furthermore, the side of the base plate is provided with lifting holes.

[0010] Furthermore, the base plate is provided with a main body positioning pin hole I and a main body fastening threaded hole. On the chassis at the bottom of the main body, there are a main body positioning pin hole II and a main body fastening through hole that mate with the main body positioning pin hole I and the main body fastening threaded hole. Positioning pin I is installed in the main body positioning pin hole I and the main body positioning pin hole II, and screw II is installed in the main body fastening threaded hole and the main body fastening through hole.

[0011] Furthermore, the base plate is provided with a support column positioning pin hole I and a support column fastening threaded hole. At the bottom of the support column, there are support column positioning pin holes II and support column fastening through holes that respectively mate with support column positioning pin holes I and support column fastening threaded holes. Positioning pins II are installed in support column positioning pin holes I and II, and screws III are installed in support column fastening threaded holes and support column fastening through holes.

[0012] Furthermore, the bottom of the support column is provided with a clearance notch to avoid interference between the support column and the chassis at the bottom of the main body.

[0013] Furthermore, the top of the support column is provided with a pressure plate positioning and fastening hole. The upper part of the pressure plate positioning and fastening hole is a pin hole and the lower part is a threaded hole. The pressure plate consists of a pressure block for pressing the standard tube and a positioning column that mates with the pin hole at the top of the pressure plate positioning and fastening hole. A pressure plate fastening through hole is provided in the center of the positioning column. After the screw I passes through the pressure plate fastening through hole, it engages with the threaded hole at the bottom of the pressure plate positioning and fastening hole to fasten the pressure plate to the top of the support column.

[0014] Furthermore, a spring is provided at the bottom of the positioning column, and the spring is installed in the positioning and fastening hole of the pressure plate.

[0015] Furthermore, the base plate, support column, and pressure plate are made of AL6061.

[0016] Furthermore, the spring is made of 304 stainless steel.

[0017] The beneficial effects of this utility model are as follows: 1. This utility model discloses a tooling for pre-weld positioning and post-weld verification of standard pipes. The base plate of this tooling, used for pre-weld positioning and post-weld verification of standard pipes, is detachably connected to the main body of the workpiece to be processed through the main body positioning pin holes I and II engaging with positioning pin I, and through the main body fastening threaded holes and through holes engaging with screw II, thereby achieving angular positioning of the main body of the workpiece. The support column is detachably connected to the base plate through the support column positioning pin holes I and II engaging with positioning pin II, and through the support column fastening threaded holes and through holes engaging with screw III. Simultaneously, the top of the support column is set with the shape of the standard pipe. The standard tube placement groove, which matches the welding installation position, can accurately constrain the XY dimension of the standard tube's center position. The support column also limits the height dimension from the center of the standard tube to the reference plane. Through these structures, the standard tube can be quickly and accurately positioned during the pre-welding assembly process, ensuring the accuracy of the tube's center position dimension before welding, effectively reducing the accumulation of post-welding errors, and improving welding quality. The top of the support column can be detachably fixed with a pressure plate, which can press the standard tube tightly to prevent it from moving in the Z direction during welding, further ensuring the stability of the standard tube's position during welding and ensuring welding accuracy.

[0018] 2. This utility model discloses a tooling for pre-weld positioning and post-weld verification of standard pipes. This tooling is easy to install and disassemble. The upper part of the positioning and fastening hole of the pressure plate is a pin hole, and the lower part is a threaded hole. The pressure plate consists of a pressure block and a positioning post that cooperates with the pin hole. A pressure plate fastening through hole is set in the center of the positioning post. Screw I passes through the through hole and cooperates with the threaded hole to fasten the pressure plate to the top of the support post. A spring is set at the bottom of the positioning post and installed in the positioning and fastening hole of the pressure plate. This spring clamping mechanism design allows the pressure plate to spring up a certain height when the screw is loosened during the installation and disassembly process, which greatly facilitates the installation and disassembly of standard pipes. At the same time, it saves the time of finding the pressure plate during the assembly process and also plays a role in preventing the pressure plate from being lost, thus improving the operating efficiency. The base plate, support post, pressure plate and other components are detachably connected by positioning pins and screws. The positioning is accurate and the connection is stable. At the same time, this detachable design makes the tooling more flexible in the use of different workpieces or different production links, and it is easy to assemble and adjust according to actual needs.

[0019] 3. This utility model discloses a tooling for pre-weld positioning and post-weld verification of standard pipes. The tooling has a center hole in the center of the bottom plate and a lifting hole on the side, which facilitates the handling, installation and positioning of the tooling and improves its practicality and ease of operation. The bottom of the support column is provided with an avoidance notch to avoid interference between the support column and the bottom chassis of the main body, ensuring the reasonable layout and normal operation of the various parts of the tooling, so that the tooling can better adapt to different workpiece structures and welding requirements.

[0020] 4. This utility model discloses a tooling for pre-weld positioning and post-weld verification of standard pipes. The base plate, support column, and pressure plate of this tooling are made of AL6061 material, which has good mechanical properties, machinability, and corrosion resistance. It can meet the strength and stability requirements of the tooling during use, and is easy to manufacture, ensuring the dimensional accuracy and surface quality of each component of the tooling. The spring is made of 304 stainless steel, which has excellent elasticity and corrosion resistance, and can stably perform the function of the spring clamping mechanism for a long time, extending the service life of the tooling.

[0021] 5. This utility model discloses a tooling for pre-weld positioning and post-weld verification of standard pipes. This tooling has post-weld verification and correction functions. After welding, the tooling can be reinstalled. By checking the assembly of the tooling with the standard pipe, the tooling can verify whether the center dimension of the standard pipe relative to the reference surface meets the drawing requirements, which facilitates post-weld self-inspection. If the verification shows that the center dimension of the standard pipe relative to the reference surface is slightly out of tolerance, the tooling can be used for dimensional correction, providing a reliable basis for post-weld correction and improving the product qualification rate and quality stability.

[0022] 6. This utility model discloses a tooling for pre-weld positioning and post-weld verification of standard pipes. This tooling improves production efficiency and capacity. The tooling has a simple, convenient, and fast structure. Compared with traditional standard pipe positioning tooling, it is more efficient in clamping, disassembly, and operation, reduces auxiliary time in the production process, significantly improves welding efficiency, and thus increases the capacity of the entire production process, meeting the needs of modern machinery manufacturing for efficient production. Attached Figure Description

[0023] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0024] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the workpiece to be processed; Figure 2 This is a three-dimensional structural schematic diagram of a tooling for pre-welding positioning and post-welding verification of standard pipes according to an embodiment of the present utility model. Figure 3 This is a three-dimensional structural diagram of the base plate of a tooling for pre-welding positioning and post-welding verification of standard pipes, according to an embodiment of the present utility model. Figure 4 This is a three-dimensional structural diagram of a support column for a tooling used for pre-welding positioning and post-welding verification of standard pipes, according to an embodiment of the present invention. Figure 5 This is a three-dimensional structural diagram of a pressure plate for a tooling used for pre-welding positioning and post-welding verification of standard pipes, according to an embodiment of the present invention. Figure 6 This is a three-dimensional structural diagram of a spring in a tooling for pre-welding positioning and post-welding verification of a standard pipe, according to an embodiment of the present invention. The components represented by the various reference numerals in the diagram are: This utility model comprises: 1. Base plate, 110. Center hole, 120. Lifting hole, 130. Main body positioning pin hole I, 140. Main body fastening threaded hole, 150. Support column positioning pin hole I, 160. Support column fastening threaded hole, 2. Support column, 210. Support column positioning pin hole II, 220. Support column fastening through hole, 230. Clearance notch, 240. Standard tube placement groove, 250. Pressure plate positioning fastening hole, 3. Pressure plate, 310. Pressure block, 320. Positioning pin, 330. Pressure plate fastening through hole, 4. Spring, 5. Positioning pin I, 6. Workpiece to be processed, 610. Main body, 611. Chassis, 612. Main body positioning pin hole II, 613. Main body fastening through hole, 620. Standard tube, 7. Positioning pin II, 8. Screw I, 9. Screw II, 10. Screw III. Detailed Implementation

[0025] like Figure 2 As shown, the tooling used for pre-weld positioning and post-weld verification of standard pipes consists of a base plate 1, a support column 2, a pressure plate 3, a spring 4, positioning pins (including positioning pin I5 and positioning pin II7), and screws (including screw I8, screw II9, and screw III10), and is suitable for the structure of standard pipes with sidewall welding.

[0026] like Figure 3 As shown, the base plate 1 is made of AL6061 and has a cylindrical or cuboid structure. It has threaded holes on its surface for securing parts and support columns 2. It also has pin holes for positioning the main body 610 and support columns 2, with precise dimensions at the center of each pin hole. The base plate 1 has a center hole 110 and a lifting hole 120 on its side. Specifically, the base plate 1 has a main body positioning pin hole I 130 and a main body fastening threaded hole 140. On the base plate 611 at the bottom of the main body 610, there are main body positioning pin holes II 612 and main body fastening through holes 613 that mate with the main body positioning pin holes I 130 and 140. The base plate 1 also has support column positioning pin holes I 150 and support column fastening threaded holes 160.

[0027] like Figure 4As shown, the support column 2 is made of AL6061 and has a cuboid structure with grooves on its surface, namely the standard tube placement groove 240. It has high dimensional accuracy and is used to support and position the standard tube 620. It has pin holes, including a support column positioning pin hole II 210 for connecting the base plate 1, and a pin hole for connecting the pressure plate 3 (i.e., the upper pin hole part of the pressure plate positioning fastening hole 250). The relative position dimension of the center of the pin holes is precise. It has threaded hole features, including a support column fastening threaded hole 220 for tightening the base plate 1, and a threaded hole at the lower part of the pressure plate positioning fastening hole 250 for tightening the spring pressure plate 3. The bottom of the support column 2 is provided with a clearance notch 230 to avoid interference between the support column 2 and the chassis 611 at the bottom of the main body 610.

[0028] like Figure 5 As shown, the spring pressure plate 3 is made of AL6061 and has a cuboid structure. The bottom cylinder acts as a positioning post 320, which fits precisely with the pin hole at the top of the support post 2 (the upper pin hole of the pressure plate positioning and fastening hole 250). A spring 4 is inserted between the two, which is used to press the standard tube 620 to prevent the tube from moving in the Z direction during welding, and also facilitates quick installation and removal. A pressure plate fastening through hole 330 is provided in the center of the positioning post 320.

[0029] like Figure 6 As shown, spring 4 is made of 304 stainless steel and has a rotating structure. It is used in conjunction with pressure plate 3 to facilitate clamping and disassembly and improve clamping efficiency.

[0030] The locating pins are made of 9CrWMn and are used to precisely position the parts and the base plate 1, the support column 2 and the base plate 1. They include locating pin I5 installed in the main body locating pin hole I130 and the main body locating pin hole II612, and locating pin II7 installed in the support column locating pin hole I150 and the support column locating pin hole II210.

[0031] The screws are made of stainless steel and are used to tighten various components, including screw I8, which passes through the pressure plate fastening through hole 330 and engages with the threaded hole at the bottom of the pressure plate positioning fastening hole 250 to fasten the spring pressure plate 3 to the top of the support column 2; screw II9, which is installed in the main body fastening threaded hole 140 and the main body fastening through hole 613; and screw III10, which is installed in the support column fastening threaded hole 160 and the support column fastening through hole 220.

[0032] The fixture used for pre-weld positioning and post-weld verification of standard pipes can accurately constrain the position of the standard pipe 620 before welding, making it easy for the welding operator to quickly position it. It can also verify the dimension from the center of the standard pipe 620 to the reference surface after welding, providing a basis for post-weld straightening, making it easy for the operator to load and unload, and improving welding efficiency.

[0033] In this fixture, the base plate 1 is used to position the parts. It can constrain the angular direction of the parts by pin positioning, thus achieving a "foolproof" function. In addition, the base plate 1 is equipped with threads, which can be used to clamp the parts with pressure plates to constrain welding deformation. The support column 2 is installed on the base plate 1 by pin positioning and tightened with screws. The standard tube 620 rests in the top groove (standard tube placement groove 240), which constrains the XY dimension of the center of the standard tube 620. The spring 4 is inserted into the top pin hole of the support column 2 (the upper pin hole of the pressure plate positioning and fastening hole 250), and then the spring pressure plate 3 is inserted into the pin hole and tightened with screws. This can clamp the standard tube 620 and prevent the standard tube 620 from moving in the Z direction. When disassembling, the spring pressure plate 3 pops up when the screws are loosened, which is convenient for installation and disassembly. At the same time, it saves the time of finding the pressure plate during the assembly process and also prevents loss.

[0034] The usage process of the tooling used for pre-weld positioning and post-weld inspection of standard pipes is as follows: Fixing the main body of the part: Place the bottom surface of the main body 610 of the workpiece 6 to be processed on the base plate 1, use the positioning pin I5 to install it into the main body positioning pin hole I130 and the main body positioning pin hole II612 to constrain the angular direction of the main body 610, and use the screw II9 to install it into the main body fastening threaded hole 140 and the main body fastening through hole 613 to tighten and fix the main body 610.

[0035] Preliminary assembly of standard tube: Assemble the standard tube 620 onto the main body 610 of the part, and limit the extension length of the standard tube 620 by the main body clamp.

[0036] Support column installation: Install support column 2 onto base plate 1. Use positioning pin II7 to install it into support column positioning pin hole I150 and support column positioning pin hole II210 for positioning. Use screw III10 to install it into support column fastening thread hole 160 and support column fastening through hole 220 to tighten support column 2. During installation, place standard tube 620 into standard tube placement groove 240 at the upper end of support column 2.

[0037] Spring and spring pressure plate installation: Insert spring 4 and spring pressure plate 3 into the pressure plate positioning and fastening hole 250 at the upper end of support column 2 (put spring 4 in first, then insert the positioning post 320 of spring pressure plate 3), and use screw I8 to pass through the pressure plate fastening through hole 330 and engage with the threaded hole at the lower part of the pressure plate positioning and fastening hole 250, tighten spring pressure plate 3 and support column 2, and fix standard tube 620.

[0038] Spot welding: Spot weld standard pipe 620 to body 610.

[0039] Disassembly tooling: Disassembly tooling facilitates welding of standard 620 pipe.

[0040] Post-weld inspection and straightening: After welding, reinstall the tooling according to the above steps. If it cannot be installed, it means that the center of the standard tube 620 is deviated from the datum plane. Straighten the standard tube 620 until the tooling can be successfully assembled.

[0041] This fixture, used for pre-weld positioning and post-weld verification of standard pipes, can accurately position the standard pipe 620 during pre-weld assembly, ensuring accurate pre-weld dimensions and reducing the accumulation of post-weld errors. After welding, it can verify whether the center dimension of the standard pipe 620 relative to the reference plane meets the drawing requirements, facilitating post-weld self-inspection. If the verification reveals that the center dimension of the standard pipe 620 relative to the reference plane is slightly out of tolerance, it can be corrected according to the fixture. The spring clamping mechanism not only acts as a pressure plate but also springs up to a certain height during loading and unloading, facilitating installation and disassembly. At the same time, it saves time in finding the pressure plate during assembly and prevents loss.

Claims

1. A fixture for pre-weld positioning and post-weld verification of a standard pipe, characterized by, Includes a base plate (1), a support column (2) and a pressure plate (3). The bottom of the main body (610) of the workpiece (6) to be processed is detachably connected to the base plate (1). The support column (2) is set below the standard tube (620). The bottom of the support column (2) is detachably connected to the base plate (1). The top of the support column (2) is provided with a standard tube placement groove (240) that matches the shape and welding installation position of the standard tube (620) of the workpiece (6) to be processed. The top of the support column (2) is detachably fixedly connected with a pressure plate (3) for pressing the standard tube (620).

2. A fixture for pre-weld positioning and post-weld verification of a standard pipe as claimed in claim 1, wherein, The base plate (1) has a central hole (110) at its center.

3. The tooling for pre-welding positioning and post-welding inspection of standard pipes according to claim 1, characterized in that, The side of the base plate (1) is provided with a lifting hole (120).

4. A fixture for pre-weld positioning and post-weld verification of a standard pipe as defined in claim 1, wherein, The base plate (1) is provided with a main positioning pin hole I (130) and a main fastening threaded hole (140). The chassis (611) at the bottom of the main body (610) is provided with a main positioning pin hole II (612) and a main fastening through hole (613) that cooperate with the main positioning pin hole I (130) and the main fastening threaded hole (140). A positioning pin I (5) is installed in the main positioning pin hole I (130) and the main positioning pin hole II (612). A screw II (9) is installed in the main fastening threaded hole (140) and the main fastening through hole (613).

5. A fixture for pre-weld positioning and post-weld verification of a standard pipe as defined in claim 1, wherein, The base plate (1) is provided with a support column positioning pin hole I (150) and a support column fastening thread hole (160). The bottom of the support column (2) is provided with a support column positioning pin hole II (210) and a support column fastening through hole (220) that respectively cooperate with the support column positioning pin hole I (150) and the support column fastening thread hole (160). Positioning pin II (7) is installed in the support column positioning pin hole I (150) and the support column positioning pin hole II (210). Screw III (10) is installed in the support column fastening thread hole (160) and the support column fastening through hole (220).

6. The tooling for pre-welding positioning and post-welding inspection of standard pipes according to claim 5, characterized in that, The bottom of the support column (2) is provided with a clearance opening (230) to avoid interference between the support column (2) and the chassis (611) at the bottom of the main body (610).

7. The tooling for pre-welding positioning and post-welding inspection of standard pipes according to claim 1, characterized in that, The top of the support column (2) is provided with a pressure plate positioning and fastening hole (250). The upper part of the pressure plate positioning and fastening hole (250) is a pin hole and the lower part is a threaded hole. The pressure plate (3) consists of a pressure block (310) for pressing the standard tube (620) and a positioning column (320) that cooperates with the upper pin hole of the pressure plate positioning and fastening hole (250). A pressure plate fastening through hole (330) is provided in the center of the positioning column (320). After the screw I (8) passes through the pressure plate fastening through hole (330), it is threadedly engaged with the lower threaded hole of the pressure plate positioning and fastening hole (250) to fasten the pressure plate (3) to the top of the support column (2).

8. A fixture for pre-weld positioning and post-weld verification of a standard pipe according to claim 7, characterized in that, A spring (4) is provided at the bottom of the positioning column (320), and the spring (4) is installed in the positioning and fastening hole (250) of the pressure plate.

9. A fixture for pre-weld positioning and post-weld verification of a standard pipe according to claim 1, characterized in that, The base plate (1), support column (2) and pressure plate (3) are made of AL6061.

10. The tooling for pre-welding positioning and post-welding inspection of standard pipes according to claim 8, characterized in that, The spring (4) is made of 304 stainless steel.

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