Positioning jig for welding processing of PCB (Printed Circuit Board)

Abstract

The invention relates to the technical field of PCB welding positioning, in particular to a PCB welding processing positioning jig which comprises a bearing seat, a containing through hole used for horizontally containing a PCB is formed in the bearing seat, and bearing plates are installed at the four corners of the containing through hole; the device further comprises two moving sets, the two moving sets are connected to the two adjacent side walls of the bearing base, each moving set comprises a moving part connected to the side wall of the bearing base, a mounting frame is connected to the moving part, a guide block is mounted at the end, away from the center of the bearing base, of the middle section of the mounting frame, and a clamping column is mounted at the upper end of the mounting frame. According to the invention, the positioning group is matched with the moving group, the limiting group I and the limiting group II, so that a plurality of spliced PCBs can be limited at the same time, the steps of limiting the plurality of spliced PCBs are reduced, the efficiency of limiting the plurality of spliced PCBs is improved, meanwhile, the plurality of spliced PCBs can be subjected to multi-stage limiting, and the limiting effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board welding positioning, and particularly relates to a positioning fixture for PCB board welding processing. Background Art

[0002] The PCB board is an essential basic component in modern electronic devices. It is used to support and connect various electronic components and achieve electrical connections between components through conductive paths.

[0003] Multiple electrical components on the PCB board are connected to it by soldering, and multiple PCB boards also need to be plugged and assembled and soldered. During the splicing process of multiple existing PCB boards, a specific positioning mechanism is usually used for placement and positioning. Then, when splicing multiple PCB boards, after each PCB board is placed, it needs to be limited. The limiting steps of multiple PCB boards are cumbersome, thus reducing the efficiency of limiting multiple PCB boards. Moreover, each positioning mechanism can only limit specific multiple PCB boards, and the applicability of the positioning mechanism is low.

[0004] Therefore, there is an urgent need to provide a positioning fixture that can quickly limit multiple PCB boards and has high applicability. Summary of the Invention

[0005] Based on this, it is necessary to provide a positioning fixture for PCB board welding processing, aiming to solve the problems generated during the splicing and limiting of multiple existing PCB boards.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A positioning fixture for PCB board welding processing, comprising: a supporting seat, a placement through-hole for horizontally placing the PCB board is opened on the supporting seat, and supporting plates are installed at the four corners of the placement through-hole.

[0007] It further includes a moving group. There are two moving groups and they are connected to two adjacent side walls of the supporting seat. The moving group includes a moving part connected to the side wall of the supporting seat. An installation frame is connected to the moving part. A guiding block is installed at one end of the middle section of the installation frame away from the center of the supporting seat, and a positioning column is installed at the upper end of the installation frame.

[0008] It further includes a first limiting group, which is arranged on one of the installation frames and is used for guiding the vertical PCB board correspondingly.

[0009] It further includes a second limiting group, which is arranged on the other installation frame and is used for guiding the other vertical PCB board correspondingly.

[0010] It further includes a positioning group which is arranged on the supporting seat and used for locking and positioning the PCB board, the first limiting group and the second limiting group. The positioning group includes a positioning plate arranged above the supporting seat. Push rods are installed at positions corresponding to the two guiding blocks at the lower end of the positioning plate. A locking part for limiting the positioning plate is connected to the supporting seat, and a clamping frame for limiting the two clamping columns is installed at the upper end of the positioning plate.

[0011] When the positioning plate moves downward, the two guiding blocks are pushed by the two push rods, and then the two moving parts are respectively driven to limit the horizontal PCB board. At the same time, the two guiding blocks drive the first limiting group and the second limiting group to limit the two vertical PCB boards through the two mounting brackets.

[0012] Preferably, the first limiting group includes a threaded rod threadedly connected to the horizontal section of the corresponding mounting bracket. A sliding groove is opened at one end of the threaded rod close to the center of the supporting seat. A top rod is slidably connected in the sliding groove, and a top spring is installed between the top rod and the vertical side wall of the sliding groove.

[0013] Preferably, the second limiting group includes two symmetrically distributed sliding brackets which are slidably and penetratingly connected to the horizontal section of the corresponding mounting bracket. The sliding brackets are in an L-shaped structure. A limiting roller is rotatably connected to the side of the two sliding brackets close to the center of the supporting seat. A return spring is installed between the horizontal section of the sliding bracket and the corresponding mounting bracket.

[0014] Preferably, the positioning group further includes a horizontal pressing part connected to the middle of the positioning plate, and two vertical limiting parts are connected to the positioning plate at positions corresponding to the first limiting group and the second limiting group respectively.

[0015] Preferably, the moving part includes a moving groove opened at the upper end of the side wall of the supporting seat. Two guide rods are installed in the moving groove. A sliding block is slidably sleeved on the two guide rods together. A connecting spring is installed between the sliding block and the groove wall of the moving groove. A moving plate is installed at the upper end of the sliding block, and the moving plate is fixedly connected to the lower end of the mounting bracket.

[0016] Preferably, the locking part includes a guide rod installed at the upper end of the supporting seat. The guide rod is slidably and penetratingly matched with the positioning plate. A support column fixedly connected to the upper end of the supporting seat is arranged on one side of the guide rod. A limiting plate is rotatably connected to the upper end of the support column.

[0017] Preferably, the horizontal pressing part includes an adjusting screw threadedly connected to the positioning plate, and a lower pressing plate is installed at the lower end of the adjusting screw.

[0018] Preferably, the vertical limiting part includes a moving channel opened on the positioning plate. A moving block is slidably connected in the moving channel. A distance-adjusting screw rod horizontally threadedly connected to the positioning plate is rotatably connected to the moving block. A lifting rod slidably penetrates through the middle of the moving block. A connecting plate is integrally formed at the upper end of the lifting rod. A pressing spring is installed between the connecting plate and the moving block. An end limiting strip with an L-shaped structure is installed at the lower end of the lifting rod.

[0019] Preferably, an arc-shaped slope is provided at the upper end of the guiding block, and a guiding opening is opened at one end of the guiding block away from the mounting bracket.

[0020] Preferably, a plurality of annular openings for passing through component leads are opened on the limiting roller.

[0021] In summary, the present invention includes the following beneficial technical effects: 1. The positioning group adopted in the present invention first cooperates with the moving group during one working process, which can realize the function of the moving group limiting the horizontally placed PCB board at the bottom. Then, during one working process, the positioning group continues to cooperate with the first limiting group and the second limiting group, which can simultaneously limit two vertically spliced PCB boards, thereby realizing the function of limiting multiple spliced PCB boards during one limiting process, reducing the steps of limiting multiple spliced PCB boards, improving the limiting efficiency of multiple spliced PCB boards, and at the same time, it can also realize multi-stage limiting of multiple spliced PCB boards, and the limiting effect is good.

[0022] 2. The cooperation between the first limiting group and the second limiting group adopted in the present invention can guide the vertical placement and insertion of the PCB board, ensuring accurate alignment of multiple spliced PCB boards and facilitating the splicing of multiple PCB boards.

[0023] 3. Both the first limiting group and the second limiting group adopted in the present invention can adjust the guiding range and the limiting range, improving the applicability of the positioning fixture and increasing the usage occasions of the positioning fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0025] Figure 1 Shows a first perspective three-dimensional structural schematic diagram of the present invention.

[0026] Figure 2 Shows a second perspective three-dimensional structural schematic diagram of the present invention.

[0027] Figure 3Shows the front view of the present invention.

[0028] Figure 4 Shows the left view of the present invention.

[0029] Figure 5 Shows Figure 3 The sectional view taken along A-A in

[0030] Figure 6 Shows Figure 4 The sectional view taken along B-B in

[0031] Figure 7 Shows Figure 6 The enlarged view of area C in

[0032] Figure 8 Shows the structural schematic diagram of the positioning group of the present invention with the locking part removed.

[0033] Wherein, the above-mentioned drawings include the following reference numerals: 1, supporting seat; 10, placing through hole; 11, supporting plate; 2, moving group; 20, moving part; 200, moving groove; 201, guide rail rod; 202, sliding block; 203, connecting spring; 204, moving plate; 21, mounting frame; 22, guiding block; 220, arc-shaped slope; 221, guiding opening; 23, positioning column; 3, limiting group one; 30, threaded rod; 31, sliding groove; 32, ejector rod; 33, ejecting spring; 4, limiting group two; 40, sliding frame; 41, limiting roller; 410, annular opening; 42, reset spring; 5, positioning group; 50, positioning plate; 51, push rod; 52, locking part; 520, guide rod; 521, support column; 522, limiting plate; 53, clamping frame; 54, horizontal pressing part; 540, adjusting screw; 541, lower pressing plate; 55, vertical limiting part; 550, moving channel; 551, moving block; 552, distance adjusting screw; 553, lifting rod; 554, lower pressing spring; 555, end limiting strip. Detailed implementation manners

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0035] Referring to Figure 1 , a positioning fixture for PCB board welding and processing, includes a supporting seat 1, and a placing through hole 10 for horizontally placing the PCB board is opened on the supporting seat 1, and supporting plates 11 are installed at the four corners of the placing through hole 10.

[0036] During specific operation, the PCB board at the bottom is placed on the four supporting plates 11 with through holes 10 manually.

[0037] Refer to Figures 1-4 , this positioning fixture for PCB board welding and processing further includes a moving group 2. There are two sets of the moving group 2, which are connected to two adjacent side walls of the supporting seat 1. The moving group 2 includes a moving part 20 connected to the side wall of the supporting seat 1. An installation frame 21 is connected to the moving part 20. A guiding block 22 is installed at one end of the middle section of the installation frame 21 away from the center of the supporting seat 1, and a positioning column 23 is installed at the upper end of the installation frame 21.

[0038] Refer to Figure 1 and Figure 2 , this positioning fixture for PCB board welding and processing further includes a first limiting group 3. The first limiting group 3 is arranged on one of the installation frames 21 and is used for guiding the vertical PCB board correspondingly.

[0039] Refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 , the first limiting group 3 includes a threaded rod 30 threadedly connected to the horizontal section of the corresponding installation frame 21. A sliding groove 31 is opened at one end of the threaded rod 30 close to the center of the supporting seat 1. A top rod 32 is slidably connected in the sliding groove 31. A top push spring 33 is installed between the top rod 32 and the vertical side wall of the sliding groove 31.

[0040] During specific operation, according to the length of the components on the vertical PCB board to be placed, the position of the corresponding top rod 32 is adjusted. The specific adjustment steps are as follows: Rotate the corresponding threaded rod 30. The threaded rod 30 drives the top rod 32 to move through the top push spring 33, so that it matches the length of the components on the vertical PCB board at the insertion position. Subsequently, select the corresponding vertical PCB board, and move the end with components welded thereon towards the top rod 32 and downwards into the slot of the bottom PCB board. The multiple top rods 32 play a guiding role in the insertion of the vertical PCB board.

[0041] Refer to Figure 1 and Figure 2 , this positioning fixture for PCB board welding and processing further includes a second limiting group 4. The second limiting group 4 is arranged on the other installation frame 21 and is used for guiding another corresponding vertical PCB board.

[0042] Refer to Figure 1 , Figure 2 and Figure 5, the second limiting group 4 includes two sliding frames 40 that are symmetrically distributed and slidably penetrate and connect to the horizontal sections of the corresponding mounting frames 21. The sliding frames 40 are in an L-shaped structure. On the side of the two sliding frames 40 close to the center of the supporting seat 1, a limiting roller 41 is rotatably connected. A return spring 42 is installed between the horizontal section of the sliding frame 40 and the corresponding mounting frame 21.

[0043] Refer to Figure 2 , a plurality of annular openings 410 for the pins of components to pass through are formed on the limiting roller 41.

[0044] During specific operation, in the initial state, the return spring 42 drives the limiting roller 41 through the sliding frame 40 to a position corresponding to the position where the components on another vertical PCB board to be placed are inserted. When another vertical PCB board is placed, the end of the other vertical PCB board with components soldered on it faces away from the limiting roller 41 and moves downward along the limiting roller 41 until it is inserted into the slot of the bottom PCB board. The annular openings 410 can prevent the pins of the components from pushing against the limiting roller 41, and the limiting roller 41 plays a guiding role in the placement of another vertical PCB board.

[0045] Refer to Figure 1 , Figure 2 and Figure 8 , the PCB board soldering and processing positioning fixture further includes a positioning group 5. The positioning group 5 is arranged on the supporting seat 1 and is used for locking and positioning the PCB board, the first limiting group 3 and the second limiting group 4. The positioning group 5 includes a positioning plate 50 arranged above the supporting seat 1. The positioning plate 50 is in a Y-shaped structure. Push rods 51 are installed at the corresponding positions of the lower end of the positioning plate 50 and the two guiding blocks 22. A locking part 52 for limiting the positioning plate 50 is connected to the supporting seat 1. A clamping frame 53 for limiting the two clamping columns 23 is installed at the upper end of the positioning plate 50.

[0046] Refer to Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8 , the positioning group 5 further includes a horizontal pressing part 54 connected to the middle of the positioning plate 50. The horizontal pressing part 54 includes an adjusting screw 540 threadedly connected to the positioning plate 50. A lower pressing plate 541 is installed at the lower end of the adjusting screw 540.

[0047] During specific operation, after the two vertical PCB boards are inserted into the bottom PCB board, rotate the adjusting screw 540. The adjusting screw 540 drives the lower pressing plate 541 to rotate, so that the lower pressing plate 541 closely adheres to the components on the bottom PCB board when the positioning plate 50 limits the two vertical PCB boards and the bottom PCB board.

[0048] Refer to Figure 1 ,Figure 2 , Figure 5 , Figure 6 and Figure 8 , two vertical limiting parts 55 corresponding to the first limiting group 3 and the second limiting group 4 are connected to the positioning plate 50 respectively. The vertical limiting part 55 includes a moving channel 550 opened on the positioning plate 50. A moving block 551 is slidably connected in the moving channel 550. An adjusting distance screw 552 horizontally threadedly connected to the positioning plate 50 is rotatably connected to the moving block 551. A lifting rod 553 is slidably penetrated through the middle of the moving block 551. A connecting plate is integrally formed at the upper end of the lifting rod 553. A pressing spring 554 is installed between the connecting plate and the moving block 551. An end limiting strip 555 with an L-shaped structure is installed at the lower end of the lifting rod 553.

[0049] During specific operation, after two vertical PCB boards are inserted into the bottom PCB board, the two adjusting distance screws 552 are rotated in sequence. The two adjusting distance screws 552 drive the two moving blocks 551 to move respectively. The two moving blocks 551 drive the two lifting rods 553 to move. The two lifting rods 553 drive the two end limiting strips 555 to move to positions corresponding to the upper ends of the two vertical PCB boards. The end limiting strip 555 has an inverted L-shaped structure.

[0050] Refer to Figure 2 , Figure 5 and Figure 6 , the moving part 20 includes a moving groove 200 opened at the upper end of the side wall of the supporting seat 1. Two guide rods 201 are installed in the moving groove 200. A sliding block 202 is slidably sleeved on the two guide rods 201 together. A connecting spring 203 is installed between the sliding block 202 and the groove wall of the moving groove 200. A moving plate 204 is installed at the upper end of the sliding block 202. The moving plate 204 is fixedly connected to the lower end of the mounting frame 21.

[0051] Refer to Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8 , the locking part 52 includes a guide rod 520 installed at the upper end of the supporting seat 1. The guide rod 520 is slidably penetrated and matched with the positioning plate 5,0. A support column 521 fixedly connected to the upper end of the supporting seat 1 is arranged on one side of the guide rod 520. A limiting plate 522 is rotatably connected to the upper end of the support column 521.

[0052] Refer to Figure 5 , an arc-shaped slope 220 is arranged at the upper end of the guiding block 22. A guiding opening 221 is opened at one end of the guiding block 22 away from the mounting frame 21.

[0053] During specific operation, in the initial state, the positioning plate 50 is separated from the mounting bracket 21. After adjusting the positions of the two end limiting strips 555, manually move the positioning plate 50 directly above the supporting seat 1. When the positioning plate 50 moves downward, it pushes two guiding blocks 22 through two push rods 51, thereby driving two moving parts 20 to limit the horizontal PCB board respectively. At the same time, the two guiding blocks 22 drive the first limiting group 3 and the two vertical PCB boards to be limited through the two mounting brackets 21. The specific operation is as follows: After adjusting the positions of the lower pressing plate 541 and the two end limiting strips 555, move the positioning plate 50 directly above the supporting seat 1, and then move the positioning plate 50 downward. The positioning plate 50 drives the two push rods 51 to move downward. Roller wheels are arranged at the lower ends of the push rods 51. When the positioning plate 50 moves downward, the lower ends of the two push rods 51 are matched with the guiding openings 221. At the same time, the positioning plate 50 is in sliding fit with the guiding rod 520. The two guiding openings 221 and the guiding rod 520 play a guiding role in the movement of the positioning plate 50. At this time, the positioning plate 50 drives the two end limiting strips 555 to be attached to the upper ends of the two corresponding vertical PCB boards through two moving blocks 551 and two lifting rods 553. The two end limiting strips 555 limit the two vertical PCB boards. Then, press the positioning plate 50 downward. The positioning plate 50 drives the two push rods 51 to squeeze two arc-shaped slopes 220. The two guiding blocks 22 are forced to drive the two mounting brackets 21 to move. The two mounting brackets 21 drive the two moving plates 204 to move. The moving plates 204 slide in the moving grooves 200 through the sliding blocks 202 until the two moving plates 204 move to the upper end of the bottom PCB board and limit the bottom PCB board. When the two mounting brackets 21 move, they drive the first limiting group 3 and the second limiting group 4 to move respectively. One mounting bracket 21 drives a plurality of threaded rods 30 to move towards the corresponding vertical PCB board. Since a plurality of ejector rods 32 are in close contact with the components of the vertical PCB board, the threaded rods 30 squeeze the pushing spring 33 through the sliding grooves 31, so that the ejector rods 32 apply a thrust to the corresponding vertical PCB board. At the same time, it cooperates with the vertical sections on the corresponding end limiting strips 555, which can ensure that the vertical PCB board inserted on the bottom PCB board is in a vertical state and limit it. The other mounting bracket 21 drives the limiting roller 41 to squeeze another vertical PCB board through two sliding frames 40. The limiting roller 41 also cooperates with the vertical sections on the corresponding end limiting strips 555, which can ensure that the other vertical PCB board inserted on the bottom PCB board is in a vertical state and limit it. When the positioning plate 50 drives the two push rods 51 to move out of the arc-shaped slopes 220 of the two guiding openings 221 and continues to move downward, the vertical PCB board limits the end limiting strips 555, thereby stretching the lower pressing spring 554 until the positioning plate 50 drives the lower pressing plate 541 to be in close contact with the components on the bottom PCB board through the adjusting screw 540. Then stop pressing the lower pressing plate 541. After that, rotate the limiting plate 522, and the limiting plate 522 moves to the upper end of the lower pressing plate 541.The function of limiting the lower pressing plate 541 is realized, and then the function of simultaneously limiting multiple PCB boards is realized, effectively improving the efficiency of limiting multiple PCB boards. At this time, the three ends of the clamping frame 53 at the upper end of the positioning plate 50 are simultaneously sleeved and connected with two positioning columns 23 and the guide rod 520, further limiting the two moving mounting frames 21, and further improving the effect of limiting multiple PCB boards.

[0054] Subsequently, the limited multiple PCB boards are placed into an existing wave soldering machine for soldering, and the soldering of the multiple PCB boards is completed.

[0055] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0056] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "install", "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0057] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A positioning fixture for PCB board soldering and processing, characterized in that, Including: A supporting base, on which a placement through-hole for horizontal placement of a PCB board is provided, and supporting plates are installed at the four corners of the placement through-hole; Two moving groups, which are connected to two adjacent side walls of the supporting base. Each moving group includes a moving part connected to the side wall of the supporting base. An installation frame is connected to the moving part. A guiding block is installed at one end of the middle section of the installation frame away from the center of the supporting base, and a positioning column is installed at the upper end of the installation frame; A first limiting group, which is arranged on one of the installation frames and is used for guiding the vertical PCB board; A second limiting group, which is arranged on the other installation frame and is used for guiding the other vertical PCB board; A positioning group, which is arranged on the supporting base and is used for locking and positioning the PCB board, the first limiting group and the second limiting group. The positioning group includes a positioning plate arranged above the supporting base. Push rods are installed at positions corresponding to the two guiding blocks at the lower end of the positioning plate. A locking part for limiting the positioning plate is connected to the supporting base, and a clamping frame for limiting the two positioning columns is installed at the upper end of the positioning plate; When the positioning plate moves downward, the two guiding blocks are pushed by the two push rods, and then the two moving parts are driven respectively to limit the horizontal PCB board. At the same time, the two guiding blocks drive the first limiting group and the second limiting group through the two installation frames to limit the two vertical PCB boards.

2. The positioning fixture for PCB board soldering and processing according to claim 1, characterized in that: The first limiting group includes a threaded rod threadedly connected to the horizontal section of the corresponding installation frame. A sliding groove is opened at one end of the threaded rod close to the center of the supporting base. A top rod is slidably connected in the sliding groove, and a top spring is installed between the top rod and the vertical side wall of the sliding groove.

3. A PCB board soldering and processing positioning fixture according to claim 1, characterized in that: The second limiting group includes two symmetrically distributed sliding frames slidably penetrating and connected to the horizontal section of the corresponding installation frame. The sliding frames are in an L-shaped structure. A limiting roller is rotatably connected to the side of the two sliding frames close to the center of the supporting base. A return spring is installed between the horizontal section of the sliding frame and the corresponding installation frame.

4. A PCB board welding and processing positioning fixture according to claim 1, characterized in that: The positioning group further includes a horizontal pressing part connected to the middle of the positioning plate, and two vertical limiting parts are connected to the positioning plate at positions corresponding to the first limiting group and the second limiting group respectively.

5. The positioning fixture for PCB board welding and processing according to claim 1, characterized in that: The moving part includes a moving groove opened at the upper end of the side wall of the supporting base. Two guide rods are installed in the moving groove. A sliding block is slidably sleeved on the two guide rods together. A connecting spring is installed between the sliding block and the groove wall of the moving groove. A moving plate is installed at the upper end of the sliding block, and the moving plate is fixedly connected to the lower end of the installation frame.

6. The positioning fixture for PCB board soldering and processing according to claim 1, wherein: The locking part includes a guide rod installed at the upper end of the supporting base. The guide rod is slidably penetrated and matched with the positioning plate. A support column fixedly connected to the upper end of the supporting base is arranged on one side of the guide rod. A limiting plate is rotatably connected to the upper end of the support column.

7. A PCB board welding and processing positioning fixture according to claim 4, characterized in that: The horizontal pressing part includes an adjusting screw threadedly connected to the positioning plate, and a lower pressing plate is installed at the lower end of the adjusting screw.

8. A PCB board soldering and processing positioning fixture according to claim 4, characterized in that: The vertical limiting part includes a moving channel opened on the positioning plate. A moving block is slidably connected in the moving channel. A distance-adjusting screw threadedly connected to the positioning plate horizontally is rotatably connected to the moving block. A lifting rod slidably penetrates through the middle of the moving block. A connecting plate is integrally formed at the upper end of the lifting rod. A downward pressing spring is installed between the connecting plate and the moving block. An end limiting strip in an L-shaped structure is installed at the lower end of the lifting rod.

9. The positioning fixture for PCB board soldering and processing according to claim 1, characterized in that: An arc-shaped slope is arranged at the upper end of the guiding block, and a guiding opening is opened at one end of the guiding block away from the installation frame.

10. A PCB board welding and processing positioning fixture according to claim 3, characterized in that: A plurality of annular openings for the pins of components to pass through are formed in the limiting roller.

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