A laminated tooling strip and method of assembling same

Abstract

The application discloses a kind of laminated tool strip and its assembly method, including by sequentially laminated setting bottom plate, middle layer plate and upper layer plate from bottom to top and fixed structure;Positioning hole is set on bottom plate, middle layer plate and upper layer plate respectively, and direction mark notch is respectively set on the side of bottom plate, middle layer plate and upper layer plate;Welding hole is set on bottom plate and middle layer plate, and a plurality of load-bearing holes for supporting pipe shell are provided in bottom plate, and limiting hole with width greater than load-bearing hole is set on middle layer plate and upper layer plate at the position corresponding to load-bearing hole.The cooperation between fixed structure and bottom plate, middle layer plate and upper layer plate is used to stack and position bottom plate, middle layer plate and upper layer plate, so that the welding holes on bottom plate, middle layer plate and upper layer plate correspond to each other and are connected by means of laminated welding, completing the assembly of the strip.The processing difficulty is small, and the processing cycle and cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a stacked loading bar and its assembly method. Background Technology

[0002] In the automated production of semiconductor optoelectronic devices, materials to be assembled need to be loaded into carrier strips to complete operations at each stage and for transfer between stages. Currently, commonly used carrier strips are designed with different mounting holes depending on the characteristics of the product. Traditional carrier strip manufacturing methods often involve milling aluminum alloy materials, which not only has a long processing cycle but also requires highly skilled operators due to the small size of the materials to be assembled, consuming a significant amount of time for precise operation. This increases the processing difficulty and greatly increases production costs. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a stacked loading bar and its assembly method to solve the problem of difficult processing of existing loading bars.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A stacked loading bar is provided, specifically comprising a bottom plate, a middle plate, and an upper plate stacked sequentially from bottom to top, and a fixing structure for stacking the bottom plate, middle plate, and upper plate together; corresponding positioning holes are provided on the bottom plate, middle plate, and upper plate, and corresponding direction marking notches are provided on one side of each of the bottom plate, middle plate, and upper plate; a plurality of corresponding welding holes are provided on the bottom plate and middle plate; a plurality of bearing holes for supporting the tube shell are provided on the bottom plate; a plurality of limiting holes for restricting the tube shell are provided on the middle plate and upper plate at positions corresponding to the bearing holes; the positioning holes, direction marking notches, welding holes, bearing holes, and limiting holes on the upper plate, bottom plate, and upper plate can all be formed by stamping, which greatly reduces the operational difficulty compared to milling; the upper plate, middle plate, and bottom plate are connected by welding through the welding holes to complete the processing of the loading bar, which is less difficult to operate, less time-consuming, and reduces manufacturing costs compared to existing processing methods.

[0005] Each of the aforementioned bearing holes and each of the limiting holes are rectangular in shape and of the same size. On one of the opposite sides of the bearing hole, two rectangular first clearance holes are symmetrically arranged and connected to the bearing hole. On each side of the first clearance hole corresponding to the bearing hole of each limiting hole, a clearance hole is formed with both ends overlapping the first clearance hole and connected to the limiting hole, thereby increasing the size of the limiting hole so that more sizes of tube shells can be installed.

[0006] At a corner where each of the first clearance holes is far apart from the others, a second clearance hole in the shape of a three-quarter circle is formed, which is connected to the first clearance hole. At both ends of each clearance hole, a third clearance hole is formed at the position corresponding to the second clearance hole, which is collinear with the center of the second clearance hole. Since there may be errors in the dimensions between different tube shells, the second clearance hole and the third clearance hole can avoid the four corners of the tube shell, preventing the corners from getting caught on the tube shell and affecting the quality of the tube shell.

[0007] The bottom plate, middle plate, and top plate each have a first end, a second end, and opposite sides. The two sides of the top plate extend backwards to make the width of the top plate greater than the width of the middle plate and the bottom plate. The two sides of the top plate extend backwards and are provided with several inclined anti-slip grooves. When the top plate, middle plate, and bottom plate need to be welded, the stacked top plate, middle plate, and bottom plate need to be clamped first. The anti-slip grooves can increase the friction between the clamping devices to ensure the transport of the carrier strip.

[0008] The upper plate has symmetrically arranged tube shell positioning through holes on both sides corresponding to the positions of the limiting holes, which are used for positioning the tube shell in the horizontal direction.

[0009] The fixing structure includes a first limiting part for vertically restricting the bottom plate, middle plate, and top plate; a second limiting part for horizontally restricting the bottom plate, middle plate, and top plate; and a retractable connecting part connected to the first and second limiting parts respectively. After the bottom plate, middle plate, and top plate are overlapped, by restricting the movement of the bottom plate, middle plate, and top plate in the vertical and horizontal directions, the positions of the bottom plate, middle plate, and top plate remain consistent during the welding process, avoiding positional deviations between the bottom plate, middle plate, and top plate that would affect the quality of the final product. Deviations in any of the bottom plate, middle plate, and top plate would cause changes in the shape of the limiting hole and bearing hole of the loading shell, making the installation of the shell difficult. The structure of this embodiment restricts the movement of the bottom plate, middle plate, and top plate from all directions, thus avoiding this problem.

[0010] The positioning holes are respectively formed on the first and second ends of the bottom plate, the middle plate, and the top plate, and correspond to each other; the first limiting part includes a limiting block with a through groove formed on one side surface and a first positioning post that is slidably disposed on the limiting block in the vertical direction and corresponds to the positioning holes on the second ends of the bottom plate, the middle plate, and the top plate. The thickness of the through groove is equal to the sum of the thicknesses of the bottom plate, the middle plate, and the top plate to restrict the movement of the bottom plate, the middle plate, and the top plate in the vertical direction when the bottom plate, the middle plate, and the top plate are engaged in the through groove; the second limiting part includes a support for the first end of the top plate. The system includes a pad and second positioning posts that slide vertically on the pad, corresponding to the positioning holes on the first ends of the bottom plate, middle plate, and top plate. Both the first and second positioning posts are provided with limiting parts to restrict their sliding after they pass through the corresponding positioning holes. This restricts the horizontal movement of the bottom plate, middle plate, and top plate in conjunction with the limiting parts, thus achieving omnidirectional positioning of the bottom plate, middle plate, and top plate. The overall structure is simple and easy to operate.

[0011] The directional marking notches are set on the side where the first ends of the corresponding bottom plate, middle plate, and top plate are located, so that they overlap vertically after the bottom plate, middle plate, and top plate are stacked. The pad is provided with a third positioning post for abutting against each directional marking notch. The directional marking notches can determine the orientation of the bottom plate, middle plate, and top plate, and before the first and second positioning posts of the fixing structure pass through the corresponding positioning holes, they are used to press the bottom plate, middle plate, and top plate against the through groove of the limiting block to restrict the movement of the bottom plate, middle plate, and top plate in the horizontal direction.

[0012] The connecting part is located on the side of the upper plate away from the middle plate. The connecting part includes a first connecting rod with one end connected to the pad, a second connecting rod with one end connected to the limiting block, and a length adjustment part provided on the other end of the first and second connecting rods for connecting the first and second connecting rods. The length adjustment part can adjust the length between the first and second connecting rods to facilitate the assembly work between the bottom plate, the middle plate and the upper plate, and simplify the installation process.

[0013] This invention provides an assembly method, comprising the following steps:

[0014] Confirm the orientation of the upper, middle and lower plates according to the notches in each direction, align the corresponding positioning holes so that the centers of each positioning hole are collinear, and then overlap the upper, middle and lower plates in order from top to bottom.

[0015] Position the pad and connector on the side of the upper plate away from the middle plate and attach the pad to the upper plate. The third positioning post abuts against the notches marked in each direction.

[0016] Align the through slot of the limiting block with the second ends of the bottom plate, middle plate and top plate. Control the second connecting rod to move toward the first connecting rod through the length adjustment part so that the limiting block moves toward the pad block until the through slot is fitted onto the second ends of the bottom plate, middle plate and top plate to restrict the movement of the bottom plate, middle plate and top plate in the vertical direction.

[0017] Push the first and second positioning pins toward the positioning holes so that the first and second positioning pins respectively pass into the corresponding positioning holes to restrict the horizontal movement of the bottom plate, middle plate and top plate;

[0018] The external welding fixture is controlled by the positioning through hole of the tube shell to hold the two sides of the upper plate, and the external welding device is controlled to weld the welding holes on the bottom plate and the middle plate until the upper plate, the middle plate and the bottom plate and the middle plate are connected.

[0019] Using the above method, the orientation of the bottom plate, middle plate, and top plate can be determined. By using the cooperation between the limiting block and the pad block and the connecting part, the bottom plate, middle plate, and top plate can be restricted in the vertical and horizontal directions. This ensures that the positioning holes of the bottom plate, middle plate, and top plate completely overlap, guaranteeing that the positions of the bottom plate, middle plate, and top plate remain relatively fixed during welding and ensuring the quality of the carrier strip after welding.

[0020] The stacked loading strip and its assembly method of the present invention have at least the following beneficial effects: through the cooperation between the fixing structure and the bottom plate, the middle plate and the top plate, the fixing structure is used to stack and position the bottom plate, the middle plate and the top plate, so that the welding holes on the bottom plate, the middle plate and the top plate correspond, and are connected by stacked welding, thereby completing the assembly of the loading strip. The bearing hole on the bottom plate and the limiting hole on the middle plate and the top plate are used to load the tube shell. The machining of the hole is less difficult and easier to operate than milling. The machining of the entire loading strip can be completed by welding the bottom plate, the middle plate and the top plate with holes. Not only is the machining difficulty less, but the machining cycle and cost are also reduced. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a front structural view of the stacked loading bar of the present invention;

[0023] Figure 2 for Figure 1 An enlarged view of part A shown;

[0024] Figure 3 for Figure 1 An enlarged view of part B shown;

[0025] Figure 4 This is a top view of the stacked loading bar of the present invention;

[0026] Figure 5 This is a top view of the upper plate of the present invention;

[0027] Figure 6 This is a top view of the middle layer plate of the present invention;

[0028] Figure 7 This is a top view of the bottom plate of the present invention.

[0029] The meanings of the labels in the attached diagram are as follows:

[0030] Bottom plate-1; Middle plate-2; Top plate-3; Fixing structure-4; First limiting part-41; Limiting block-411; First positioning post-412; Through groove-413; Second limiting part-42; Pad-421; Second positioning post-422; Third positioning post-423; Connecting part-43; First connecting rod-431; Second connecting rod-432; Length adjusting part-433; Sliding groove-4331; Engaging groove-4332; Slot-4333; Engaging teeth -4334; Spring piece -4335; Pressing block -4336; Limiting part -44; First magnetic block -441; Second magnetic block -442; Bearing hole -51; First clearance hole -511; Boss -512; Second clearance hole -513; Limiting hole -52; Clearance hole -521; Third clearance hole -522; Welding hole -53; Positioning hole -54; Direction marking notch -55; First end -56; Second end -57; Anti-slip groove -58; Tube shell positioning through hole -59. Detailed Implementation

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] The stacked loading bar of the present invention is used to support a package, wherein the package refers to a semiconductor package, which is a semiconductor periodic or integrated circuit containing one or more discrete housings, made of metal, plastic, glass or ceramic.

[0033] Reference Figures 1 to 7The stacked loading bar of the present invention includes a bottom plate 1, a middle plate 2 and an upper plate 3 stacked sequentially from bottom to top, and a fixing structure 4 for stacking the bottom plate 1, the middle plate 2 and the upper plate 3 together. The bottom plate 1 has a plurality of bearing holes 51 for supporting the tube shell, and the middle plate 2 and the upper plate 3 have a plurality of limiting holes 52 for limiting the tube shell. Each limiting hole 52 on the middle plate 2 and each limiting hole 52 on the upper plate 3 are respectively corresponding to each bearing hole 51 on the bottom plate 1. When the bottom plate 1, the middle plate 2 and the upper plate 3 are stacked, the bearing holes 51 and the limiting holes 52 overlap each other to correspond. Both the bottom plate 1 and the middle plate 2 have corresponding welding holes 53. After the bottom plate 1, the middle plate 2, and the top plate 3 are stacked by the fixing structure 4, they are welded through the welding holes 53 on the bottom plate 1 and the middle plate 2, so that the middle plate 2 and the bottom plate 1 are connected and fixed to the top plate 3 to form a whole. The overlapping bearing holes 51 and limiting holes 52 after assembly are used to load the shell. The bottom plate 1, the middle plate 2, and the top plate 3 are all provided with corresponding positioning holes 54, and corresponding direction marking notches 55 are provided on one side of the bottom plate 1, the middle plate 2, and the top plate 3. The direction marking notches 55 are used to quickly identify the assembly direction of the bottom plate 1, the middle plate 2, and the top plate 3 during assembly and keep them consistent.

[0034] Specifically, the bottom plate 1, middle plate 2, and top plate 3 are all rectangular flat structures. Each of these has a first end 56, a second end 57, and opposite sides. The bottom plate 1 and middle plate 2 have the same width. The two sides of the top plate 3 extend horizontally in opposite directions, making its width greater than the widths of the middle plate 2 and the bottom plate 1. The distance between the first end 56 and the second end 57 is the length of the bottom plate 1, middle plate 2, and top plate 3, and the distance between the two sides is the width of the bottom plate 1, middle plate 2, and top plate 3. When the bottom plate 1, middle plate 2, and top plate 3 are stacked together with the fixing structure 4, the top plate 3, middle plate 2, and bottom plate 1 are adjacent to each other and in contact. Four positioning holes 54 are provided on the bottom plate 1, the middle plate 2, and the top plate 3. The four positioning holes 54 are symmetrically arranged in pairs at the four corners of the bottom plate 1, the middle plate 2, and the top plate 3, so that the four positioning holes 54 on the top plate 3, the middle plate 2, and the bottom plate 1 are respectively located at the first end 56 and the second end 57. When the bottom plate 1, the middle plate 2, and the top plate 3 are stacked, the four positioning holes 54 of the bottom plate 1, the four positioning holes 54 of the middle plate 2, and the four positioning holes 54 of the top plate 3 are respectively overlapped to form four sets of positioning holes 54 with collinear centers. The positioning holes 54 with collinear centers in the vertical direction are one set. The positioning holes 54 are used to fix the position of the bottom plate 1, the middle plate 2, and the top plate 3 during welding, ensuring that the bottom plate 1, the middle plate 2, and the top plate 3 can be located in the predetermined position without deviation after welding.

[0035] At least two bearing holes 51 are arranged in a rectangular array on the bottom plate 1. The number and position of several limiting holes 52 on the middle plate 2 and the upper plate 3 correspond one-to-one with the number and position of the bearing holes 51, and are also arranged in a rectangular array, thus enabling them to support multiple tube shells. Each bearing hole 51 and each limiting hole 52 is a rectangular hole structure of the same size so that each bearing hole 51 has two pairs of opposite sides. The length direction of the bearing hole 51 can be parallel to the length direction of the bottom plate 1, the middle plate 2 and the upper plate 3, or perpendicular to the length direction of the bottom plate 1, the middle plate 2 and the upper plate 3. On one of the opposite sides of the bearing hole 51, two rectangular first clearance holes 511 connected to the bearing hole 51 are symmetrically arranged, so that each bearing hole 51 has four first clearance holes 511 connected to the bearing hole 51. Each first clearance hole 511 corresponds to the four corners of the tube shell. The installation area is configured such that a boss 512 protruding inward is formed between the two first clearance holes 511 on each side. The boss 512 is used to support the tube shell. At a corner of the four first clearance holes 511 that is far apart from each other, corresponding to the four corners of the tube shell, a second clearance hole 513 in the shape of a three-quarter circle is formed, which is connected to the first clearance holes 511. This is used to avoid the four corners of the tube shell. Since some tube shells have errors, the corners of the tube shells are not flat. Therefore, in order to avoid damaging the tube shells, the clearance holes 51 are avoided to prevent the side of the bearing hole 51 from contacting the corners of the tube shells and damaging the tube shells, thereby increasing the protection of the tube shells. On each limiting hole 52, corresponding to the first clearance hole 511 of the bearing hole 51, a clearance hole 521 is formed on both sides, with both ends overlapping the first clearance hole 511. The clearance hole 521 is connected to the limiting hole 52 so that the limiting hole 52 faces away from the outer edge of the boss 512 of the bearing hole 51 to avoid the boss 512, so that the boss 512 can support the tube shell. The limiting hole 52 restricts the position of the tube shell so that the entire carrier strip can load the tube shell and limit the tube shell around its perimeter to fix the position of the tube shell. The clearance hole 521 extends along the pin direction of the tube shell to be compatible with through-hole tube shells and surface-mount tube shells of the same length and width. At both ends of each clearance hole 521, corresponding to the position of the second clearance hole 513, a third clearance hole 522 is formed, which is collinear with the center of the second clearance hole 513. The four third clearance holes 522 on each limiting hole 52 correspond to the four second clearance holes 513 on their respective bearing holes 51. When the bottom plate 1, the middle plate 2 and the top plate 3 are stacked, the four third clearance holes 522 and the four second clearance holes 513 overlap to complete the overall clearance of the corners of the tube shell and avoid damage to the tube shell with errors in shape.

[0036] In this embodiment, several sets of anti-slip groups are symmetrically arranged on both sides of the upper plate 3 extending away from each other. Each set of anti-slip groups has several anti-slip grooves 58 that extend vertically. The anti-slip grooves 58 of each set are arranged obliquely along the length of the upper plate 3, and the anti-slip grooves 58 are diagonally shaped and evenly distributed. A tube positioning through hole 59 is provided between each adjacent set of anti-slip groups. The tube positioning through hole 59 corresponds to each row of limiting holes 52 arranged in a rectangular array on the upper plate 3. That is, a tube positioning through hole 59 is provided on both outer sides of each row of limiting holes 52. When placing the tube, the corresponding tube positioning through hole 59 on each row of limiting holes 52 is used to guide the tube and position it horizontally, facilitating identification by automated equipment.

[0037] The bottom plate 1 and the middle plate 2 each have a plurality of welding holes 53, each of which is circular. These welding holes 53 are arranged in a rectangular array, evenly distributed on the bottom plate 1 and the middle plate 2, and located around and at the edges of the corresponding limiting holes 52 or bearing holes 51. The number and position of the welding holes 53 on the bottom plate 1 and the middle plate 2 are the same. Preferably, the welding holes 53 on the bottom plate 1 are larger than those on the middle plate 2, and the difference in diameter between the welding holes 53 on the bottom plate 1 and the welding holes 53 on the middle plate 2 is within 2 mm. During welding, welding is performed at the welding holes 53 after stacking. The portion of the upper plate 3 located at the corresponding welding holes 53 is welded together through the welding holes 53, thereby completing the processing of the carrier strip. Compared to milling, this invention is easier to process.

[0038] The directional marking notch 55 is formed on the side where the first end 56 of the corresponding bottom plate 1, middle plate 2 and top plate 3 are located. When the bottom plate 1, middle plate 2 and top plate 3 are stacked, the directional marking notches 55 on the bottom plate 1, middle plate 2 and top plate 3 are all vertically overlapping. The directional marking notch 55 extends vertically and horizontally towards the side away from the bottom plate 1, forming a notch shape. The directional marking notch 55 gradually narrows from the outside to the inside along the length of the bottom plate 1 to facilitate horizontal movement towards each directional marking notch 55 to align the directional marking notches 55 on the bottom plate 1, middle plate 2, and top plate 3. During welding, the directional marking holes are used to distinguish the orientation of the bottom plate 1, middle plate 2, and top plate 3, preventing incorrect placement of the bottom plate 1, middle plate 2, and top plate 3, which could cause misalignment between the positioning holes 54, welding holes 53, bearing holes 51, and limiting holes 52, thus hindering welding and shell support. This embodiment avoids this assembly error. In this embodiment, the directional marking notch 55 is semi-circular, and its center coincides with the side edge of the first end 56 of the carrier strip.

[0039] The fixing structure 4 includes a first limiting part 41 for vertically limiting the stacked bottom plate 1, middle plate 2, and top plate 3; a second limiting part 42 for horizontally limiting the stacked bottom plate 1, middle plate 2, and top plate 3; and a retractable connecting part 43 connected to the first limiting part 41 and the second limiting part 42 respectively. This facilitates adjustment of the distance between the first limiting part 41 and the second limiting part 42, allowing it to be used to connect to carrier strips of different lengths. During the installation of this embodiment, the retractable connecting part 43 makes the installation of the first limiting part 41 and the second limiting part 42 more convenient. The first limiting part 41 and the second limiting part 42 can stack the bottom plate 1, middle plate 2, and top plate 3 and limit and position the stacked bottom plate 1, middle plate 2, and top plate 3 from all directions, ensuring that the bottom plate 1, middle plate 2, and top plate 3 can achieve the expected stacking effect without positional deviation, thus facilitating the processing of the carrier strip.

[0040] The first limiting part 41 is used to be installed on the second end 57 of the bottom plate 1, the middle plate 2, and the top plate 3, and the second limiting part is used to be installed on the first end 56 of the bottom plate 1, the middle plate 2, and the top plate 3. The first limiting part 41 includes a limiting block 411 with a through groove 413 formed on one side surface and a first positioning post 412 that is slidably disposed on the limiting block 411 in the vertical direction and corresponds to the positioning hole 54 on the second end 57 of the bottom plate 1, the middle plate 2, and the top plate 3. The thickness of the through groove 413 is equal to the sum of the thicknesses of the bottom plate 1, the middle plate 2, and the top plate 3. When the bottom plate 1, the middle plate 2, and the top plate 3 are stacked in sequence, the limiting block 411 passes through the through groove 413. The groove 413 is fitted onto the second end 57 of the stacked bottom plate 1, middle plate 2 and top plate 3. Since the thickness of the groove 413 is the same as the sum of the thicknesses of the bottom plate 1, middle plate 2 and top plate 3, the second end 57 of the bottom plate 1, middle plate 2 and top plate 3 is just stuck in the groove 413 and cannot move vertically, thus restricting the bottom plate 1, middle plate 2 and top plate 3, so that the bottom plate 1, middle plate 2 and top plate 3 fit tightly together.

[0041] Specifically, the limiting block 411 has a cuboid structure, and the length direction of the limiting block 411 is parallel to the width direction of the bottom plate 1, the middle plate 2 and the top plate 3. The through groove 413 is formed on the side of the limiting block 411 facing the bottom plate 1, the middle plate 2 and the top plate 3, and the length direction of the through groove 413 is consistent with the length direction of the limiting block 411. The through groove 413 is cuboid in shape and the side facing the bottom plate 1 and both ends of the through groove 413 (i.e. the two ends of the through groove 413 facing away from each other along the length direction) are open to form a through groove structure. Preferably, the slot 413 is designed such that the opening on the side of the through slot facing the bottom plate 1, the middle plate 2, and the top plate 3 gradually narrows from the side facing the bottom plate 1 to the side away from the bottom plate 1, so that the opening of the through slot 413 facing the bottom plate 1 is funnel-shaped. The funnel-shaped opening can guide the bottom plate 1, the middle plate 2, and the top plate 3 when they are inserted into the through slot 413, so that the second ends 57 of the bottom plate 1, the middle plate 2, and the top plate 3 can enter the through slot 413 more easily, thereby allowing the limiting block 411 to be quickly fitted onto the second ends 57 of the bottom plate 1, the middle plate 2, and the top plate 3. A first through hole is provided on the limiting block 411 in the vertical direction. The first through hole corresponds to the first positioning post 412 and intersects the through groove 413. There are two first through holes, which are arranged to correspond to the positions of the two positioning holes 54 on the second end 57 of the bottom plate 1, the middle plate 2 and the top plate 3. There are two second positioning posts 422, which are respectively movably arranged in the two first through holes so that they can slide relative to the first through holes in the vertical direction. The first positioning post 412 is used to make the center of the first positioning post 412 collinear with the two positioning holes 54 located on the second end 57 after the limiting block 411 is sleeved on the bottom plate 1, the middle plate 2 and the top plate 3. At this time, by pushing the first positioning post 412, the first positioning post 412 can be inserted into the positioning hole 54, thereby restricting the movement of the bottom plate 1, the middle plate 2 and the top plate 3 in the horizontal direction.

[0042] The second limiting part 42 includes a pad 421 for supporting the first end 56 of the upper plate 3, a second positioning post 422 slidably disposed on the pad 421 corresponding to the positioning holes 54 on the first end 56 of the bottom plate 1, the middle plate 2, and the upper plate 3, and a third positioning post 423 disposed on the pad 421 for abutting against the directional marking notches 55. The two ends of the connecting part 43 are respectively connected to the pad 421 and the limiting block 411. When the third positioning post 423 abuts against the directional marking notches 55 on the bottom plate 1, the middle plate 2, and the upper plate 3, it achieves initial positioning of the bottom plate 1, the middle plate 2, and the upper plate 3. After the limiting block 411 is fitted onto the bottom plate 1, the middle plate 2, and the upper plate 3, the length of the connecting part 43 is adjusted so that the third positioning post 423 can press the bottom plate 1, the middle plate 2, and the upper plate 3 tightly against the through groove 413, thereby... The bottom plate 1, middle plate 2, and top plate 3 are positioned and limited to ensure that they are aligned and stacked together. At this time, the positioning hole 54 is collinear with the center of each of the first positioning post 412 and the second positioning post 422. The length direction of the bottom plate 1, middle plate 2, and top plate 3 is restricted, but there is no specific restriction in the horizontal direction perpendicular to the length direction of the bottom plate 1, middle plate 2, and top plate 3. Therefore, if other external forces are applied in this direction, the position of the bottom plate 1, middle plate 2, and top plate 3 may be deviated. Therefore, pushing the second positioning post 422 and the first positioning post 412 to insert them into the positioning hole 54 can achieve all-round restriction in the horizontal direction, further realizing the positioning of the bottom plate 1, middle plate 2, and top plate 3, and avoiding the possibility of the bottom plate 1, middle plate 2, and top plate 3 shifting in the horizontal direction.

[0043] In this embodiment, the pad 421 has a cuboid structure. Two second through holes are formed vertically through the pad 421, corresponding to the positions of the two positioning holes 54 on the first end 56 of the bottom plate 1, middle plate 2, and top plate 3. Two second positioning posts 422 are movably disposed within the second through holes to slide vertically relative to them. A third positioning post 423 is cylindrical and positioned corresponding to the direction marking notch 55. The diameter of the third positioning post 423 is equal to the diameter of the direction marking notch 55. Preferably, the diameters of the first positioning post 412 and the second positioning post 422 are the same as the diameter of the positioning hole 54, and the ends of the first positioning post 412 and the second positioning post 422 passing through the positioning hole 54 gradually narrow in the vertical direction away from the first positioning post 412 and the second positioning post 422.

[0044] Preferably, both the first positioning post 412 and the second positioning post 422 are provided with limiting parts 44 for restricting the sliding of the first positioning post 412 and the second positioning post 422 after they pass through the corresponding positioning holes 54 in sequence. When the first positioning post 412 passes through the positioning hole 54 located on the second end 57 and the second positioning post 422 passes through the positioning hole 54 located on the first end 56, since the first positioning post 412 and the second positioning post 422 are movably connected, under the action of external force, the first positioning post 412 and the second positioning post 422 may fall out of the corresponding positioning hole 54 and fail to play a limiting role. However, the limiting parts 44 can restrict the first positioning post 412 and the second positioning post 422 from continuing to slide, ensuring that the first positioning post 412 and the second positioning post 422 can always be located in the corresponding positioning hole 54 when needed and will not slide out of the positioning hole 54, so that the first positioning post 412 and the second positioning post 422 achieve the best positioning and limiting effect.

[0045] Four limiting parts 44 are provided and are respectively disposed on one end of the two first positioning posts 412 and the two second positioning posts 422. Each limiting part 44 includes a first magnetic block 441 disposed on one end of the corresponding first positioning post 412 or second positioning post 422. The corresponding first magnetic block 441 and the tapered portion are respectively disposed on both ends of the first positioning post 412 and the second positioning post 422. Second magnetic blocks 442 are provided on the pad 421 and the limiting block 411 for magnetic attraction with the first magnetic blocks 441. When the first positioning post 412 and the second positioning post 422 are inserted into the corresponding positioning hole 54, the first magnetic block 441 is magnetically attracted to the second magnetic block 442. This restricts the movement of the first positioning post 412 and the second positioning post 422, ensuring they remain inserted within the positioning hole 54. This guarantees that the corresponding welding holes 53 of the bottom plate 1, the middle plate 2, and the top plate 3 are collinear, and that the corresponding bearing holes 51 are aligned with the limiting holes 52, resulting in a neat and high-quality carrier strip after welding. When it is necessary to remove the first positioning post 412 and the second positioning post 422, they can be pushed out of the positioning hole 54 by external force. It should be noted that the first positioning post 412 and the second positioning post 422 are independent of and not connected to the fixing structure 4. Alternatively, a vertical groove can be opened on one end of the first positioning post 412 and the second positioning post 422 where the first magnetic block 441 is located, and a slide rail can be installed in the first and second through holes. The slide rail can be slidably installed in the groove to achieve a sliding connection between the first positioning post 412 and the first through hole, and a sliding connection between the second positioning post 422 and the second through hole. It should be noted that the structure of the limiting part 44 is not limited to the structure of this embodiment, and other structures that can achieve this function can be used instead. For example, the limiting part 44 includes four pin holes corresponding to the first through hole and the second through hole opened in the upper plate 3 in the horizontal direction, and four pins for being inserted into the pin holes. The pin holes corresponding to the first through hole intersect the corresponding first through hole, and the pin holes corresponding to the second through hole intersect the corresponding second through hole. A third through hole is opened in the horizontal direction on both the first positioning post 412 and the second positioning post 422. When the first positioning post 412 and the second positioning post 422 are inserted into the corresponding positioning hole 54, the pins pass through the pin holes and enter the third through hole in the first through hole or the second through hole to limit the movement of the first positioning post 412 and the second positioning post 422 in the vertical direction.

[0046] The connecting part 43 is located on the side of the upper plate 3 away from the middle plate 2, and the pad 421 is located on the same side as the connecting part 43. The connecting part 43 includes a first connecting rod 431 connected to the pad 421 at one end, a second connecting rod 432 connected to the limiting block 411 at one end, and a length adjusting part 433 provided on the other end of the first connecting rod 431 and the second connecting rod 432 for connecting the first connecting rod 431 and the second connecting rod 432. The length between the first connecting rod 431 and the second connecting rod 432 can be adjusted by the length adjusting part 433.

[0047] Specifically, both the first connecting rod 431 and the second connecting rod 432 are elongated rod-shaped structures with their length direction parallel to the length direction of the bottom plate 1. The length, width, and height of the first connecting rod 431 are all greater than those of the second connecting rod 432. The length adjustment part 433 includes a sliding groove 4331 for the second connecting rod 432 to pass through, which is formed on the end face of the first connecting rod 431 facing the second connecting rod 432; an engagement groove 4332 on the inner wall of one side of the sliding groove 4331; a slot 4333 that forms a connection with the sliding groove 4331 on the outer wall of the first connecting rod 431; and engagement teeth 4334 formed on the end of the second connecting rod 432 near the first connecting rod 431 for engaging with the engagement groove 4332. The first connecting rod 432 is provided with a spring piece 4335 made of elastic material. The sliding groove 4331, engagement groove 4332, and slot 4333 are all arranged along the length of the first connecting rod 431. The slot 4333 connects the inner cavity of the sliding groove 4331 and the opening of the sliding groove 4331. The second connecting rod 432 can slide within the sliding groove 4331 along the length of the first connecting rod 431, allowing the length between the first connecting rod 431 and the second connecting rod 432 to extend or retract. The sliding groove 4331 is cuboid in shape, and engagement teeth 4334 are formed on the side of the second connecting rod 432 facing the engagement groove 4332. Both the engagement groove 4332 and the engagement teeth 4334 are serrated and have grooves. The grooves of the engagement groove 4332 and the engagement teeth 4334 are arranged obliquely relative to the second connecting rod 432, extending from one end of the sliding groove 4331 towards the other end of the second connecting rod 432 along the length of the first connecting rod 431. One end of the spring piece 4335 is connected to the second connecting rod 432, and the other end of the spring piece 4335 is inclined towards the second connecting rod 432 and abuts against the inner wall of the sliding groove 4331. The meshing teeth 4334 and the spring piece 4335 are respectively arranged on opposite sides of the second connecting rod 432, so that when the second connecting rod 432 moves towards the sliding groove 4331, the spring piece 4335 squeezes the meshing teeth 4334 so that the meshing teeth 4334 always abut against the side of the meshing groove 4332, while the inclined end is inclined towards the second connecting rod 432. The inclined meshing groove 4332's groove arm presses against the outer wall of the inclined meshing tooth 4334, allowing the meshing tooth 4334 to continue moving along the length of the first connecting rod 431 within the sliding groove 4331. When the second connecting rod 432 slides outward from the sliding groove 4331, the meshing tooth 4334 is stuck by the meshing groove 4332 due to the compression of the spring piece 4335 and the groove shape of the meshing groove 4332, thus restricting the sliding of the second connecting rod 432.Preferably, a pressing block 4336 is provided on the second connecting rod 432, which extends movably out of the slot 4333. Both the pressing block 4336 and the slot 4333 are located on the side opposite to the spring piece 4335. When it is necessary to extend or retract the first connecting rod 431 and the second connecting rod 432, the pressing block 4336 is pressed towards the spring piece 4335, causing the pressing block 4336 to move the second connecting rod 432 towards the spring piece 4335. The second connecting rod 432 presses the spring piece 4335, causing the meshing teeth 4334 to move away from the meshing groove 4332 until the meshing teeth 4334 disengage from the meshing groove 4332, thereby allowing the length between the first connecting rod 431 and the second connecting rod 432 to be adjusted. It should be noted that the second connecting rod 432 is made of an elastic material and has elasticity. When the pressing block 4336 is pressed by an external force, the second connecting rod 432 can bend relatively without breaking, and can return to its original shape after the external force is removed, so that the entire length adjustment part 433 can realize the length adjustment between the first connecting rod 431 and the second connecting rod 432, and the method of use is simple and convenient.

[0048] The assembly method of the stacked loading bar of the present invention includes the following steps:

[0049] (1) Confirm the orientation of the upper plate 3, middle plate 2 and bottom plate 1 according to the notches 55 in each direction, align the corresponding positioning holes 54 so that the centers of each positioning hole 54 are collinear, and then overlap the upper plate 3, middle plate 2 and bottom plate 1 from top to bottom.

[0050] (2) Position the pad 421 and the connecting part 43 on the side of the upper plate 3 away from the middle plate 2 and attach the pad 421 to the upper plate 3, with the third positioning post 423 abutting against the notch 55 of each direction mark.

[0051] (3) Align the through groove 413 of the limiting block 411 with the second end 57 of the bottom plate 1, the middle plate 2 and the top plate 3. Control the second connecting rod 432 to move toward the first connecting rod 431 through the length adjustment part 433 so that the limiting block 411 moves toward the pad block until the through groove 413 is fitted onto the second end 57 of the bottom plate 1, the middle plate 2 and the top plate 3. The bottom plate 1, the middle plate 2 and the top plate 3 abut against the third positioning post 423 through the direction marking notch 55 to restrict the movement of the bottom plate 1, the middle plate 2 and the top plate 3 in the vertical and length directions.

[0052] (4) Push the first positioning post 412 and the second positioning post 422 toward the positioning hole 54 so that the first positioning post 412 and the second positioning post 422 respectively pass into the corresponding positioning hole 54 and the first magnetic block 441 is magnetically attracted to the second magnetic block 442 to restrict the bottom plate 1, the middle plate 2 and the top plate 3 from moving in the horizontal direction.

[0053] (5) Control the external welding fixture to hold both sides of the upper plate 3 through the positioning through hole 59 of the tube shell, and control the external welding device to weld the welding holes 53 on the bottom plate 1 and the middle plate 2 until the upper plate 3, the middle plate 2 and the bottom plate 1 and the middle plate 2 are connected.

[0054] (6) The stacked carrier strip is clamped by a welding fixture, and the positions of the stacked bottom plate 1, middle plate 2 and top plate 3 are confirmed through the positioning through hole 59 of the tube shell. The welding holes 53 on the bottom plate 1 and middle plate 2 are welded by a welding tool until the bottom plate 1, middle plate 2 and top plate 3 are welded together.

[0055] (7) Open the welding fixture and fixing structure 4, and take out the welded carrier bar.

[0056] Compared with the prior art, the stacked loading strip and its assembly method of the present invention divide the loading strip into a three-layer structure consisting of a bottom plate 1, a middle plate 2, and an upper plate 3. Welding holes 53, bearing holes 51, or limiting holes 52 are punched on the bottom plate 1, the middle plate 2, and the upper plate 3 respectively by means of stamping. The loading strip is processed by welding the bottom plate 1, the middle plate 2, and the upper plate 3 through the welding holes 53. Compared with the milling method, the processing difficulty is reduced, and the overall structure has better quality after welding due to the restriction of the fixed structure 4.

Claims

1. A stacked loading bar for supporting pipe shells, characterized in that: It includes a bottom layer, a middle layer and an upper layer, which are stacked sequentially from bottom to top, as well as a fixing structure for stacking the bottom layer, the middle layer and the upper layer together; Corresponding positioning holes are provided on the bottom plate, middle plate and top plate, and corresponding directional marking notches are provided on one side of the bottom plate, middle plate and top plate respectively; a number of corresponding welding holes are provided on the bottom plate and middle plate, a number of bearing holes for supporting the shell are provided on the bottom plate, and a number of limiting holes for limiting the shell are provided on the middle plate and top plate at the positions corresponding to the bearing holes.

2. The stacked loading bar as described in claim 1, characterized in that: Each of the bearing holes and each of the limiting holes are rectangular in shape and of the same size. On one of the opposite sides of the bearing hole, two rectangular first clearance holes are symmetrically arranged and connected to the bearing hole. On each side of the first clearance hole corresponding to the bearing hole of each limiting hole, a clearance hole is formed with both ends overlapping the first clearance hole and connected to the limiting hole.

3. The stacked loading bar as described in claim 2, characterized in that: At a corner where each of the first clearance holes is far apart from the others, a second clearance hole in the shape of a three-quarter circle is formed, which is connected to the first clearance hole. At both ends of each clearance hole, a third clearance hole is formed at a position corresponding to the position of each second clearance hole, which is collinear with the center of the second clearance hole.

4. The stacked loading bar as described in claim 3, characterized in that: The bottom plate, middle plate and top plate each have a first end, a second end and opposite sides. The two sides of the top plate extend backwards so that the width of the top plate is greater than the width of the middle plate and the bottom plate. The two sides of the top plate extend backwards and are provided with a number of inclined anti-slip grooves.

5. The stacked loading bar as described in claim 4, characterized in that: The upper plate has symmetrically arranged tube shell positioning through holes on both sides corresponding to the positions of the limiting holes.

6. The stacked loading bar as described in claim 1 or 5, characterized in that: The fixing structure includes a first limiting part for vertically limiting the bottom plate, the middle plate and the top plate, a second limiting part for horizontally limiting the bottom plate, the middle plate and the top plate, and a retractable connecting part that is connected to the first limiting part and the second limiting part respectively.

7. The stacked loading bar as described in claim 6, characterized in that: The positioning holes are respectively formed on the first and second ends of the bottom plate, the middle plate and the top plate and correspond to each other; The first limiting part includes a limiting block with a through groove formed on one side surface and a first positioning post that is slidably disposed on the limiting block in the vertical direction and corresponds to the positioning holes on the second ends of the bottom plate, the middle plate and the top plate. The thickness of the through groove is equal to the sum of the thicknesses of the bottom plate, the middle plate and the top plate. The second limiting part includes a pad for supporting the first end of the upper plate and a second positioning post that is slidably disposed on the pad in the vertical direction and corresponds to the positioning holes on the first ends of the bottom plate, the middle plate and the upper plate. Both the first positioning post and the second positioning post are provided with limiting parts for restricting the sliding of the first positioning post and the second positioning post after they pass through the corresponding positioning holes in sequence.

8. The stacked loading bar as described in claim 7, characterized in that: The directional marking notches are set on the side where the first end of the corresponding bottom plate, middle plate and top plate are located, so that they overlap vertically after the bottom plate, middle plate and top plate are stacked; the pad is provided with a third positioning post for abutting against the directional marking notch.

9. The stacked loading bar as described in claim 8, characterized in that: The connecting part is located on the side of the upper plate away from the middle plate. The connecting part includes a first connecting rod with one end connected to the pad plate, a second connecting rod with one end connected to the limiting block, and a length adjustment part provided on the other end of the first connecting rod and the second connecting rod for connecting the first connecting rod and the second connecting rod. The length adjustment part can adjust the length between the first connecting rod and the second connecting rod.

10. An assembly method, characterized in that, Includes the following steps: Confirm the orientation of the upper, middle and lower layers based on the notches in each direction, align the corresponding positioning holes so that the centers of each positioning hole are collinear, and then overlap the upper, middle and lower layers in sequence from top to bottom. Position the pad and connector on the side of the upper plate away from the middle plate and attach the pad to the upper plate. The third positioning post abuts against the notches marked in each direction. Align the through slot of the limiting block with the second ends of the bottom plate, middle plate and top plate. Control the second connecting rod to move toward the first connecting rod through the length adjustment part so that the limiting block moves toward the pad block until the through slot is fitted onto the second ends of the bottom plate, middle plate and top plate to restrict the movement of the bottom plate, middle plate and top plate in the vertical direction. Push the first and second positioning pins toward the positioning holes so that the first and second positioning pins respectively pass into the corresponding positioning holes to restrict the horizontal movement of the bottom plate, middle plate and top plate; The external welding fixture is controlled by the positioning through hole of the tube shell to hold the two sides of the upper plate, and the external welding device is controlled to weld the welding holes on the bottom plate and the middle plate until the upper plate, the middle plate and the bottom plate and the middle plate are connected.

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