Pattern plate stud welding and positioning tool
By using paired positioning modules and connecting handles between modules, the problem of inaccurate position control of positioning tools between holes in the tube sheet was solved, achieving uniform distribution and precise positioning of studs, thus improving welding quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN SINOMA ENVIRONMENTAL PROTECTION CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-15
AI Technical Summary
When the existing positioning tool is removed from one hole in the tube sheet and inserted into the next, it cannot accurately control the circumferential position of the positioning tool. This results in irregular and inconsistent distribution of studs around different tube sheet holes, which can easily cause interference during welding operations or local deformation of the tube sheet.
The positioning modules are arranged in pairs and connected by handles between the modules to ensure that the positioning modules and the holes in the tube sheet naturally stop rotating. Combined with the fact that the number and arrangement of the positioning holes on the positioning modules are the same, the studs are accurately positioned and evenly distributed.
This ensures that the number and distribution of studs around each hole in the perforated plate are consistent, avoiding interference during welding operations and local deformation of the perforated plate, thus improving welding accuracy and efficiency.
Smart Images
Figure CN224238466U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a welding and positioning fixture for flower plate studs, belonging to the technical field of welding auxiliary equipment used for fixing or positioning workpieces. Background Technology
[0002] Metal filter bags are the core filtration components of baghouse dust collectors, typically fixed to a tube sheet in a matrix configuration. There are generally two methods for fixing metal filter bags. One method, as disclosed in Chinese Utility Model Patent No. CN212283243U, involves a head flange clamping device for metal filter bags. In this device, the head flange has multiple lugs on its outer circumference, each lug having a through-hole for a screw to pass through. One end of the screw is welded to the tube sheet, and the other end passes through the lug and connects to a nut, thus clamping the head flange to the tube sheet. Multiple screws (i.e., studs) are arranged around the tube sheet holes. The other method, as disclosed in Chinese Utility Model Patent No. CN219848693U, involves a metal filter bag flange sealing device. In this device, multiple bolts (i.e., studs) are fixed to the tube sheet around the tube sheet holes. The studs pass through independent pressure plates and connect to nuts. The nuts press the pressure plates, which in turn press the flange edge of the filter bag mechanism, thus fixing the filter bag mechanism.
[0003] Therefore, regardless of the fixing method, studs must first be welded onto the perforated plate. Since there are a large number of holes in the perforated plate, manually positioning each stud individually results in very low positioning accuracy and welding efficiency. To address this, Chinese utility model patent CN210159348U discloses a positioning tool for a filter bag fixing assembly. This tool includes a primary frustum, a secondary frustum, and a tertiary frustum with diameters decreasing progressively from top to bottom. The outer edge of the primary frustum has concentrically distributed positioning holes, and a positioning tube fits above the positioning holes. The outer diameter of the tertiary frustum is the same as the diameter of the holes in the perforated plate. In use, inserting the tertiary frustum into the holes in the perforated plate achieves positioning between the tool and the plate. The positioning tube positions the studs, ensuring the accuracy of the stud welding.
[0004] The aforementioned positioning tool can position multiple studs around a single hole in a tube sheet at once, and a handle is provided on the primary circular platform for easy handling. However, due to the matrix arrangement of numerous tube sheet holes, once multiple studs around one hole are welded and fixed, the circumferential position of the positioning tool cannot be accurately controlled when it is removed and placed into the next hole. This results in irregular and inconsistent distribution of studs around different holes, and large errors can lead to two studs around adjacent holes being too close together, causing welding interference or local deformation of the tube sheet due to two welding points being too close together. Utility Model Content
[0005] The purpose of this utility model is to provide a welding and positioning fixture for tube sheet studs, so as to solve the problem that when the existing positioning tool is taken out from one tube sheet hole and put into the next tube sheet hole, it is impossible to accurately control the circumferential position of the positioning tool, resulting in irregular and inconsistent distribution of studs around different tube sheet holes.
[0006] To achieve the above objectives, the welding and positioning fixture for the flower plate stud in this utility model adopts the following technical solution:
[0007] A welding positioning fixture for tube sheet studs includes a pair of positioning modules. The two positioning modules in a pair are connected by a module handle. Each positioning module includes a positioning boss for insertion into a tube sheet hole with an outer diameter that matches the inner diameter of the tube sheet hole. Each positioning module also includes an annular body concentric with the positioning boss and with an outer diameter larger than the outer diameter of the positioning boss. Multiple positioning holes for positioning the welding of the studs are evenly distributed along the circumference of the annular body. The number of positioning holes on each positioning module and the arrangement of each positioning hole relative to the center of the positioning module are the same.
[0008] The beneficial effects of the above technical solution are as follows: This utility model is a combination invention, which uses positioning modules in pairs. The positioning boss of each positioning module can realize the positioning between the positioning module and the hole in the tube sheet, and the positioning hole on the annular body of each positioning module can position the welding of the stud, thus realizing the basic function of the positioning module. At the same time, the two positioning modules in a pair are connected by a module handle, so that the two positioning modules in a pair are bound together by the module handle, realizing that the two positioning modules can simultaneously position and cooperate with a pair of tube sheet holes. When the two positioning modules are taken out from a pair of tube sheet holes and put into the next pair of tube sheet holes, the two positioning modules and the pair of tube sheet holes naturally stop rotating. No positioning module can change its circumferential position relative to the tube sheet hole. Therefore, it is only necessary to put a pair of positioning modules into a pair of tube sheet holes in one direction to ensure that the circumferential orientation of each positioning module relative to the tube sheet hole remains unchanged. Meanwhile, the number of positioning holes on each positioning module and the arrangement of each positioning hole relative to the center of the positioning module are the same. This ensures that the number and distribution pattern of studs around each hole in the tube sheet are consistent, ensuring the positional accuracy of the studs around each hole in the tube sheet. This avoids problems such as welding interference caused by two studs around two adjacent holes in the tube sheet being too close, or local deformation of the tube sheet caused by two welding points being too close.
[0009] Furthermore, the positioning module is provided in two pairs, with the four positioning modules in each pair arranged in a matrix. The handles between the two pairs of positioning modules are connected by the inter-pair handles, which are used to lift all four positioning modules at the same time.
[0010] Furthermore, each end of the handle is provided with a hanging slot, and the middle part of the handle between the two modules is respectively hooked into the corresponding hanging slot.
[0011] Furthermore, the inter-module handle includes a U-shaped main body and extensions located at both ends of the U-shaped main body and extending outwards and away from each other. Each of the two positioning modules in a pair is provided with a socket for the extensions at both ends of the inter-module handle to be inserted, and there is a fitting gap between the extensions and the sockets.
[0012] Furthermore, a fixing tube is fixed on the positioning module, and the inner hole of the fixing tube forms the insertion hole.
[0013] Furthermore, a baffle is fixed to the end of the extension that passes through the insertion hole for engaging with the stop of the fixed tube.
[0014] Furthermore, the outer periphery of the annular body is provided with a plurality of lugs evenly distributed along the circumference, and each lug is provided with the aforementioned positioning hole.
[0015] Furthermore, each lug is fixed with a positioning tube, which is arranged coaxially with the positioning hole, and the inner diameter of the positioning tube is equal to the diameter of the positioning hole.
[0016] Furthermore, the positioning boss includes a cylindrical section and a frustum section, the frustum section being used to guide the positioning boss into the hole in the perforated plate.
[0017] Furthermore, the positioning module includes an end plate, with a positioning boss concentrically fixed on one side of the end plate, and a handle connecting the modules to the other side of the end plate. The portion of the end plate extending beyond the positioning boss forms the aforementioned annular body. Attached Figure Description
[0018] Figure 1 This is a top view of Embodiment 1 of the welding positioning tool for the flower plate stud of this utility model;
[0019] Figure 2 This is a front view of Embodiment 1 of the welding and positioning fixture for the flower plate stud of this utility model;
[0020] Figure 3 This is a left view of Embodiment 1 of the welding positioning fixture for the flower plate stud of this utility model;
[0021] Figure 4 This is a schematic diagram of the mating part between the positioning boss and the hole in the flower plate in Embodiment 1 of the welding positioning tool for the flower plate stud of this utility model;
[0022] Figure 5 This is a top view of Embodiment 2 of the welding positioning fixture for the flower plate stud of this utility model;
[0023] Figure 6 This is a top view of Embodiment 3 of the welding and positioning fixture for the flower plate stud of this utility model.
[0024] In the diagram: 100, positioning module; 1, end plate; 11, annular body; 12, lug; 2, positioning boss; 21, cylindrical section; 22, frustum section; 3, positioning tube; 4, fixing tube; 200, handle between modules; 201, U-shaped main body; 202, extension; 203, baffle; 300, handle between modules; 301, hanging groove; 400, perforated plate; 401, perforated plate hole. Detailed Implementation
[0025] To address the technical problems existing in the prior art, the basic concept of this utility model is to bind the positioning modules together in pairs, so that when a pair of positioning modules is taken out from a pair of orifice holes and put into the next pair of orifice holes, the two positioning modules and the pair of orifice holes naturally stop rotating, and no positioning module can change its circumferential position relative to the orifice hole. At the same time, combined with the positioning holes on each positioning module having the same number and arrangement pattern, it is ensured that the number and distribution pattern of the studs around each orifice hole are consistent.
[0026] The features and performance of this utility model will be further described in detail below with reference to the embodiments.
[0027] The implementation method of the welding and positioning fixture for the studs on the decorative plate in this utility model is as follows:
[0028] like Figure 1 , Figure 2 and Figure 3 As shown, the tube sheet stud welding positioning fixture includes a pair of positioning modules 100. As an embodiment 1, there are two pairs of positioning modules 100 in this embodiment, that is, a total of four positioning modules 100. The four positioning modules 100 are arranged in a matrix. The spacing between the two pairs of positioning modules 100 and the spacing between the two positioning modules 100 in a pair are the same as the arrangement spacing of the tube sheet holes arranged in a matrix on the tube sheet, so that the tube sheet stud welding positioning fixture can simultaneously position and cooperate with the four tube sheet holes.
[0029] In this invention, the two positioning modules 100 in a pair are connected by a module handle 200, which binds the two positioning modules 100 together. This allows the two positioning modules 100 to simultaneously engage with a pair of perforated plate holes. When the two positioning modules 100 are removed from one pair of perforated plate holes and placed into the next pair, the two positioning modules 100 and the pair of perforated plate holes naturally stop rotating. Neither positioning module 100 can change its circumferential position relative to the perforated plate hole. The same applies to the other pair of positioning modules 100. Therefore, by placing the four positioning modules 100 into the four perforated plate holes in one direction, the circumferential orientation of each positioning module 100 relative to the perforated plate hole remains unchanged.
[0030] Specifically, the inter-module handles 200 of the two pairs of positioning modules 100 are connected by inter-pair handles 300. The inter-pair handles 300 are used to lift four positioning modules 100 simultaneously. This design is simple, easy to operate, and the force application position is relatively central. Furthermore, as... Figure 2 As shown, each end of the inter-module handle 300 is provided with a hanging slot 301. The middle parts of the two inter-module handles 200 are respectively hooked into the corresponding hanging slots 301. The structure is simple, which facilitates the connection between the two inter-module handles 200 and the inter-module handle 300, and also facilitates the disassembly of the inter-module handle 300. This allows each pair of positioning modules 100 to be operated and used independently through the inter-module handle 200. Figure 5 As shown, this scheme, as an embodiment 2 of the welding positioning fixture for the flower plate stud, has only one pair of positioning modules 100 and no inter-handle 300.
[0031] Of course, given the connection method between the inter-module handle 300 and the inter-module handle 200, the positioning module 100 can be further expanded to obtain, as shown below. Figure 6 The embodiment 3 shown has three pairs of positioning modules 100. Hanging slots are provided at both ends and the middle of the inter-module handles 300 for the inter-module handles 200 of the three pairs of positioning modules 100 to be hooked. In this case, since there is an inter-module handle 200 in the middle of the inter-module handle 300, this position is not suitable for direct gripping. Therefore, the operator can use both hands to simultaneously grasp the inter-module handles 300, with the grasping position located on both sides of the middle inter-module handle 200. This method of picking up and putting down involves applying force with both hands simultaneously, and since the weight of the six positioning modules 100 is relatively large, applying force with both hands makes it easy to pick up, thus it is feasible to a certain extent.
[0032] However, considering that too many positioning modules 100 would drastically increase the weight of the tooling and make it impossible to weld multiple studs around the tube sheet holes at the same time, it is preferable to adopt Embodiment 1. This ensures that four tube sheet holes can be positioned at once, avoiding frequent tooling movement, while the overall weight of the tooling is moderate, allowing operators to easily pick it up and put it down with one hand.
[0033] Of course, for Embodiments 1 and 3, the connection between the inter-module handle 300 and the inter-module handle 200 can also be a bolt connection instead of a hook connection. In this case, the inter-module handle 300 and the inter-module handle 200 are still detachable. Of course, in other embodiments, it can also be welded, in which case the inter-module handle 300 is not detachable.
[0034] Of course, regardless of the embodiment, the structure of each positioning module 100 is the same, such as... Figures 1-3 At the same time, combined Figure 4As shown, each positioning module 100 includes a positioning boss 2 for insertion into the perforated plate hole 401, with its outer diameter matching the inner diameter of the perforated plate hole 401. Further, to facilitate insertion of the positioning boss 2 into the perforated plate hole 401, the positioning boss 2 is designed to include a cylindrical section 21 and a frustum section 22. The conical surface of the frustum section 22 can guide the positioning boss 2 into the perforated plate hole 401. Of course, in other embodiments, the positioning boss 2 may only include the cylindrical section 21, and the positioning boss 2 can be guided into the perforated plate hole 401 by machining a chamfer at the end of the cylindrical section 21.
[0035] Each positioning module 100 also includes an annular body 11 concentric with the positioning boss 2 and having an outer diameter larger than that of the positioning boss 2. In use, the annular body 11 overlaps the tube sheet 400. In embodiments 1 to 3, each positioning module 100 includes an end plate 1. The positioning boss 2 is concentrically fixed to one end face of the end plate 1, and a handle 200 between modules is connected to the other end face of the end plate 1. The portion of the end plate 1 extending beyond the positioning boss 2 constitutes the annular body 11. Since the end plate 1 is a single, complete plate, this structure facilitates the manufacture of positioning fixtures. The fixing method between the end plate 1 and the positioning boss 2 can be welding, bonding, or screw connection. In other embodiments, the annular body 11 can be an independent annular component, which is fitted around the outer periphery of the positioning boss 2 and welded to it. In this case, the handle 200 between modules is connected to the end face of the positioning boss 2.
[0036] The annular body 11 is provided with a plurality of positioning holes evenly distributed along its circumference for positioning the welding of studs. In embodiments 1 to 3, each positioning module 100 has four positioning holes on its annular body 11. The four positioning holes are arranged in a cross shape relative to the center of the positioning module 100, distributed on rays at 45 degrees, 135 degrees, 225 degrees, and 315 degrees. In other embodiments, the number of positioning holes may be set to 6 or other numbers depending on the number of studs to be welded and fixed on the tube sheet 400.
[0037] In this utility model, regardless of how many pairs of positioning modules 100 are provided, and regardless of how many positioning holes are on each positioning module 100, the number of positioning holes on each positioning module 100 and the arrangement orientation of each positioning hole relative to the center of the positioning module 100 are the same. This ensures that the number and distribution pattern of studs around each flower plate hole 401 are consistent, ensuring the positional accuracy of the studs around each flower plate hole 401, and avoiding problems such as welding operation interference caused by two studs around two adjacent flower plate holes 401 being too close, or local deformation of the flower plate 400 caused by two welding points being too close.
[0038] Furthermore, such as Figure 1As shown, the annular body 11 has a plurality of lugs 12 protruding outward from its outer periphery, evenly distributed along the circumference. Each lug 12 has a positioning hole. The lugs 12 are only partially protruding on the annular body 11. Placing the positioning holes on the lugs 12 saves material and reduces the weight of the positioning fixture. Furthermore, it avoids the situation where the annular body 11 is a regular circle, resulting in an excessively large outer diameter. This would cause interference between adjacent positioning modules 100 when the spacing of the perforated plate holes is small, preventing the positioning fixture from being assembled and used. In other embodiments, if the spacing of the perforated plate holes is large enough, the annular body 11 can be a regular circle, i.e., its outer circumferential surface is cylindrical. In this case, the positioning holes are directly provided on the annular body 11.
[0039] Furthermore, a positioning tube 3 is fixed to the surface of each lug 12. The specific fixing method can be welding or bonding. The positioning tube 3 is arranged coaxially with the positioning hole, and the inner diameter of the positioning tube 3 is equal to the diameter of the positioning hole. In this way, the inner hole of the positioning tube 3 can also position the welding of the stud, which is equivalent to lengthening the length of the positioning hole. In other words, while ensuring the length of the positioning hole, the positioning tube 3 is only fixed locally on the end plate 1, which can reduce the thickness of the end plate 1 and reduce the weight of the positioning fixture. Of course, in other embodiments, the end plate 1 can be made thick enough that the positioning hole can be directly opened on the end plate 1 to meet the length requirement. In this case, it is not necessary to fix the positioning tube 3.
[0040] Regarding the connection method between the inter-module handle 200 and the positioning module 100, as follows: Figure 3 As shown, the inter-module handle 200 includes a U-shaped main body 201 and extensions 202 located at both ends of the U-shaped main body 201 and extending outwards and away from each other. Each of the two positioning modules 100 in a pair is provided with a socket for inserting the extensions 202 at both ends of the inter-module handle 200. There is a fitting gap between the extensions 202 and the sockets. In this way, when the positioning fixture is not in use, the inter-module handle 300 can be removed. Or, for a positioning fixture with only one pair of positioning modules 100, the inter-module handle 200 can be rotated to fit against the end faces of the two positioning modules 100, thereby saving space and facilitating storage.
[0041] Furthermore, a fixing tube 4 is fixed on the positioning module 100, and the inner hole of the fixing tube 4 constitutes the aforementioned insertion hole, which facilitates the formation of the insertion hole, has a simple structure, and is easy to manufacture. In embodiments 1 to 3, the fixing tube 4 is fixed on the end face of the end plate 1, located at the center, and the fixing tubes 4 on the two positioning modules 100 are arranged coaxially. In other embodiments, if the annular body 11 is an independently welded annular component fixed to the outer periphery of the positioning boss 2, then the fixing tube 4 is fixed on the end face of the positioning boss 2. Of course, regardless of the form, a U-shaped ring can be used instead of the fixing tube 4, and the U-shaped ring and the end face of the positioning module 100 together form the insertion hole. In other embodiments, the insertion hole can also be machined on the end face of the positioning module 100 by removing material. In this case, a groove is machined on the end face of the positioning module 100, and the insertion hole is machined on the side wall of the groove. The groove is provided to accommodate the extension 202, so as to facilitate the assembly between the module handle 200 and the positioning module 100.
[0042] Furthermore, a baffle 203 for engaging with the fixing tube 4 is fixed to the end of the extension 202 that passes through the insertion hole. The length of the extension 202 allows the positioning module 100 to move laterally within a small range (within 3mm), so that each positioning module 100 can be smoothly inserted into the hole in the perforated plate. The baffle 203 can restrict the lateral position of the positioning module 100 and prevent the positioning module 100 from disengaging from the inter-module handle 200. In other embodiments, screws can be installed on the outer peripheral surface of the end of the extension 202 that passes through the insertion hole as a stop for engaging with the fixing tube 4. Of course, cotter pins or elastic retaining rings for shafts can also be installed as stop without affecting the smooth rotation of the inter-module handle 200. Of course, in other embodiments, the stop member may not be installed. Instead, a tool may be used to bend the end of the extension 202 that passes through the socket (in cases where the extension 202 is easily deformed). The bent part constitutes the stop member. Alternatively, the end of the extension 202 may be deformed to form a riveting part, which constitutes the stop member. Of course, the extension 202 may be straight and the stop member may not be installed. In this case, the positioning fixture can be held flat to prevent the positioning module 100 from detaching from the handle 200 between the module and the positioning module.
[0043] by Figures 1-3Taking the positioning fixture shown as an example, when in use, four positioning modules 100 are inserted into four holes in the perforated plate at once to position the welding positions of multiple studs around the four holes. During welding, the operator holds the welding torch of the arc welding equipment and inserts it into the positioning holes of the positioning tube 3 and the annular body 11. The welding torch holds the stud with a pre-installed ceramic sleeve at its lower end. The outer diameter of the ceramic sleeve matches the inner diameter of the positioning hole. The ceramic sleeve can constrain the position of the stud and prevent it from shifting during welding. At the same time, the ceramic sleeve can prevent heat from being conducted to the positioning tube 3 and causing it to melt. After welding, the operator removes the positioning fixture and breaks the ceramic sleeve by striking it with a tool. It should be noted that this welding method of using a ceramic sleeve is existing technology, such as the welding method of stainless steel studs to steel plates disclosed in Chinese invention patent application CN111069750A.
[0044] Along the transverse or longitudinal direction of the perforated plate, place the removed positioning fixture into the next set of perforated plate holes, and perform welding operations on the studs around the periphery of the next set of perforated plate holes. Repeat the above steps to complete the welding operation of the studs around the periphery of two rows or two columns of perforated plate holes. When the four positioning modules 100 are placed, none of the positioning modules 100 can rotate relative to the perforated plate holes, and the number of positioning holes on each positioning module and the arrangement of each positioning hole relative to the center of the positioning module are the same. This ensures that the number and distribution pattern of the studs around each perforated plate hole are consistent, guaranteeing the positional accuracy of the studs around each perforated plate hole.
[0045] When only two holes remain at the transverse or longitudinal end of the tube sheet (only one hole remains in a row or column), the inter-handle 300 can be removed, and the inter-module handle 200 can be used to insert the two positioning modules 100 into the two holes to continue the stud welding operation.
[0046] After the studs around the outer edges of the two rows of perforated plate holes in the horizontal direction are welded, the positioning fixture is moved one distance in the longitudinal direction. Then, the positioning fixture is placed sequentially in the horizontal direction to complete the welding of the studs around the outer edges of the next two rows of perforated plate holes, and so on, until all studs are welded. Alternatively, after the studs around the outer edges of the two columns of perforated plate holes in the longitudinal direction are welded, the positioning fixture is moved one distance in the horizontal direction. Then, the positioning fixture is placed sequentially in the longitudinal direction to complete the welding of the studs around the outer edges of the next two columns of perforated plate holes, and so on, until all studs are welded.
[0047] In other embodiments of the welding and positioning fixture for the flower plate stud: a fixing hole is provided on the annular body, the positioning tube is inserted into the fixing hole and welded to the fixing hole, the end face of the positioning tube is flush with the end face of the annular body, and at this time the positioning hole is completely formed by the inner hole of the positioning tube.
[0048] In other embodiments of the welding and positioning fixture for the flower plate stud: the two ends of the handle between the modules can be directly welded and fixed to the two positioning modules in a pair, in which case the handle between the modules cannot be rotated.
[0049] In other embodiments of the welding and positioning fixture for the stud on the tube sheet: the positioning boss can be stepped, such as the first-level boss, second-level boss and third-level boss with gradually decreasing outer diameter disclosed in patent CN210159348U. The outer diameter of the third-level boss is adapted to the inner diameter of the hole in the tube sheet, and the second-level boss overlaps on the tube sheet, so that there is a gap between the first-level boss and the tube sheet. At this time, the root of the stud is exposed, and the root of the stud can be welded and fixed to the tube sheet using an ordinary welding gun. At this time, the inner diameter of the positioning hole is adapted to the outer diameter of the stud to ensure the positioning accuracy of the stud.
[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.
Claims
1. A welding and positioning fixture for flower plate studs, characterized in that, The device includes a pair of positioning modules, which are connected by a handle. Each positioning module includes a positioning boss for insertion into a perforated plate hole with an outer diameter that matches the inner diameter of the hole. Each positioning module also includes an annular body concentric with the positioning boss and with an outer diameter larger than the positioning boss. The annular body has multiple positioning holes evenly distributed along its circumference for positioning the welding of studs. The number of positioning holes on each positioning module and the arrangement of each positioning hole relative to the center of the positioning module are the same.
2. The welding and positioning fixture for the flower plate studs according to claim 1, characterized in that, The positioning module is set in two pairs, and the four positioning modules in the two pairs are arranged in a matrix. The handles between the two pairs of positioning modules are connected by the handles between the pairs, which are used to lift all four positioning modules at the same time.
3. The welding and positioning fixture for the flower plate studs according to claim 2, characterized in that, Each end of the handle is provided with a hanging slot, and the middle part of the handle between the two modules is hooked into the corresponding hanging slot.
4. The welding and positioning fixture for the flower plate studs according to any one of claims 1 to 3, characterized in that, The inter-module handle includes a U-shaped main body and extensions located at both ends of the U-shaped main body and extending outwards and away from each other. Each of the two positioning modules in a pair is provided with a socket for the extensions at both ends of the inter-module handle to be inserted, and there is a fitting gap between the extensions and the sockets.
5. The welding and positioning fixture for the flower plate studs according to claim 4, characterized in that, A fixing tube is fixed on the positioning module, and the inner hole of the fixing tube forms the insertion hole.
6. The welding and positioning fixture for the flower plate studs according to claim 5, characterized in that, The end of the extension that passes through the insertion hole is fixed with a baffle for engaging with the fixed tube stop.
7. The welding and positioning fixture for the flower plate studs according to any one of claims 1 to 3, characterized in that, The outer periphery of the annular body is provided with a plurality of lugs evenly distributed along the circumference, and each lug is provided with the aforementioned positioning hole.
8. The welding and positioning fixture for the flower plate studs according to claim 7, characterized in that, Each lug is fixed with a positioning tube, which is arranged coaxially with the positioning hole, and the inner diameter of the positioning tube is equal to the diameter of the positioning hole.
9. The welding and positioning fixture for the flower plate studs according to any one of claims 1 to 3, characterized in that, The positioning boss includes a cylindrical section and a frustum section. The frustum section is used to guide the positioning boss into the hole in the perforated plate.
10. The welding and positioning fixture for flower plate studs according to any one of claims 1 to 3, characterized in that, The positioning module includes an end plate, with a positioning boss concentrically fixed on one side of the end plate. A handle between modules is connected to the other side of the end plate, and the portion of the end plate extending beyond the positioning boss forms the annular body.