A positioning fixture and processing technology for soldering PCB boards of computer mainframes

Abstract

The present invention relates to the field of electrical component welding, and specifically to a positioning fixture and processing technology for welding processing of a computer host PCB board, comprising an operating frame, a clamping assembly and a suction fixing assembly, wherein a first magnetic plate is horizontally arranged on one side of the lower end of the operating frame, two first magnetic slides are slidingly adsorbed on both sides of the first magnetic plate, and two first magnetic slides for placing PCB boards are horizontally arranged at the upper end of the operating frame through the first magnetic plate, and can be quickly adapted and adjusted for PCB boards of different sizes, and then cooperated with the clamping assembly that can also be adaptively adjusted, when performing welding auxiliary positioning on different PCB boards, the operation is convenient, the application range is wide, and under the cooperation of the suction fixing assembly, the support positioning is stable and reliable, the smoke generated by the welding of the PCB board can be promptly processed, the function is complete, and the use is safe.

Description

Technical Field

[0001] The invention relates to the field of electrical component welding, and in particular to a positioning fixture and a processing technology for welding a computer host PCB board. Background Art

[0002] PCB stands for printed circuit board, which is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. When PCB is combined with other electrical components, it needs to be connected by welding equipment. In small and medium-sized enterprises, PCB is mainly welded manually, and it needs to be positioned and fixed by positioning fixtures during welding.

[0003] The prior art patent CN217486724U discloses a processing jig for an optical transceiver integrated module, including an upper cover and a lower cover. A connecting seat is provided at one end of the upper cover and the lower cover that are close to each other. A connecting shaft can be embedded in the shaft hole of the connecting seat to hinge the upper cover and the lower cover. A lower positioning block and a PCB board positioning platform are provided on the surface of the lower cover on the side opposite to the upper cover, which can adjust the gap between the PCB board and the optical device, and can also fix the PCB positioning platform, thereby ensuring the welding effect. When in use, the PCB board is mainly pressed and fixed by the upper and lower covers, and then the through holes provided on the cover plate correspond to the position to be welded on the PCB board, and then targeted welding is performed. However, this positioning jig needs to be customized according to the existing structure of the PCB board to be welded when in use, and has a small scope of application and a single function. Summary of the invention

[0004] The purpose of the present invention is to provide a positioning fixture and processing technology for computer host PCB board welding processing to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a positioning fixture for welding processing of a computer host PCB board, the positioning fixture for welding processing of a computer host PCB board comprising:

[0006] An operating frame, wherein a first magnetic plate is horizontally arranged on one side of the lower end of the operating frame, two first magnetic slides are slidably adsorbed on both sides of the first magnetic plate, and a PCB board is horizontally overlapped on the upper ends of the two first magnetic slides;

[0007] A clamping assembly, wherein the clamping assembly is movably arranged on one side of the operating frame, and the clamping assembly includes a flip cover plate and two second magnetic slides, wherein the two second magnetic slides are slidably adsorbed on both sides of the flip cover plate, and a first pressing plate is horizontally arranged on one side of the two second magnetic slides, and the two first pressing plates are respectively in contact with the upper ends of the two first magnetic slides and clamp the upper ends of the PCB board;

[0008] The suction fixing component is arranged at the upper end of the flip cover plate, and the suction fixing component includes a suction control box. The two sides of the suction control box are horizontally symmetrically arranged on two fixed shafts. The upper ends of the two second magnetic suction slides are each provided with an arc-shaped fixing groove, and the two fixed shafts are respectively moved horizontally to pass through the two arc-shaped fixing grooves and the operating frame.

[0009] Preferably, the upper ends of the two first magnetic slides close to each other are provided with positioning grooves, and the two sides of the PCB board are horizontally inserted into the two positioning grooves respectively, the depth of the positioning groove is less than the thickness of the PCB board, and the width of the positioning groove is equal to the installation edge width of the PCB board.

[0010] Preferably, a plurality of threaded connection holes are symmetrically provided on the first magnetic plate, and lifting rods are vertically inserted through threads at the upper ends of the plurality of threaded connection holes, and the upper ends of the plurality of lifting rods are respectively in contact with the lower end of the PCB board.

[0011] Preferably, two hinge shafts are horizontally symmetrically provided on both sides of the flip cover, and the two hinge shafts rotate and penetrate the two sides of the operating frame respectively. Two adjustment grooves are symmetrically opened on both sides of the flip cover, and two second magnetic suction plates are horizontally symmetrically provided in the two adjustment grooves. The two second magnetic suction slides are respectively placed in the two adjustment grooves and movably absorb and sleeve the two second magnetic suction plates.

[0012] Preferably, the first pressure plate is arranged on a side of the second magnetic slide close to the first magnetic slide, a matching strip is vertically provided on the upper end of the first magnetic slide, and a docking groove is opened on the first pressure plate. When the lower end of the first pressure plate is in contact with the upper end of the first magnetic slide, the matching strip passes through the plug-in docking groove, and the two side surfaces of the upper end of the matching strip are inclined surface structures. A second pressure plate is horizontally provided at the center of one side of the flip cover close to the PCB board, and the lower end of the second pressure plate is pressed tightly against one side of the upper end of the PCB board.

[0013] Preferably, a storage groove is provided at the center of the upper end of the flip cover between the two adjustment grooves, the suction control box is movably arranged in the storage groove, one side of the two fixed axes respectively movably penetrates through the two sides of the storage groove, stable guide grooves are provided on both sides of the operating frame, and the fixed axes penetrate through the two sides of the storage groove and respectively movably penetrate through the two stable guide grooves, and the stable guide grooves are arc-shaped structures.

[0014] Preferably, a first elastic abutment strip is horizontally provided at the lower end of the arc-shaped fixed groove of the second magnetic slide, a groove is provided on one side of the fixed axis located in the adjustment groove, and a plurality of second elastic abutment strips are symmetrically provided on one side of the groove, and when the suction control box is tilted, the first elastic abutment strip engages and abuts with the second elastic abutment strip.

[0015] Preferably, the operating frame is horizontally provided with a support rod on one side of the stable guide groove, a fixed shaft is horizontally provided with an abutment plate on one side of the stable guide groove, a diversion cavity is opened in the suction control box, and a plurality of suction holes are opened in the diversion cavity through one side of the suction control box; when the first pressure plate is in contact with the upper end of the first magnetic slide, the suction hole of the suction control box points to the PCB board, and one side of the abutment plate abuts against the lower end of the support rod.

[0016] Preferably, the diversion chamber of the suction control box passes through the fixed axis and is provided with a first pipe connection groove, two matching joints are symmetrically provided on both sides of the operating frame, a transfer groove is provided in the matching joint, an access port and a second pipe connection groove are respectively provided at the lower end and one side of the transfer groove, and a suction hose is respectively connected between the second pipe connection grooves of the two matching joints and the first pipe connection grooves of the two fixed axes.

[0017] A processing technology for welding a computer host PCB board, wherein the processing technology for welding a computer host PCB board is applied to a positioning fixture for welding a computer host PCB board, and comprises the following steps:

[0018] Step 1: According to the width of the PCB board to be processed at this stage, slide the first magnetic slide and the second magnetic slide along the first magnetic plate and the second magnetic plate to a suitable position respectively, and keep the magnetic attraction self-fixed. According to the layout of the electrical components at the bottom of the PCB board, insert several lifting rods through threads;

[0019] Step 2: Insert the two sides of the PCB into the positioning grooves of the two first magnetic slides respectively, and the upper ends of the plurality of lifting rods are respectively abutted against the lower ends of the PCB for support;

[0020] Step 3: The flip cover is rotated by the hinge shaft to control the flipping of the second magnetic slide and the first pressure plate, the lower end of the first pressure plate contacts the upper end of the first magnetic slide, the first pressure plate cooperates with the positioning groove to clamp the two sides of the PCB board, and the docking groove is sleeved on the docking strip;

[0021] Step 4: At this time, the suction control box is rotated by the fixed shaft so that one side of the suction hole of the suction control box is tilted to point toward the PCB board. As the fixed shaft and the suction control box rotate, a plurality of second elastic abutting strips on one side of the fixed shaft abut and engage with the first elastic abutting strips. Under the deformation and compression abutment of the second elastic abutting strips and the first elastic abutting strips, the second magnetic suction slide maintains a fixed posture, and then the first magnetic suction slide is also strengthened and fixed accordingly under the engagement of the matching strip and the first pressure plate.

[0022] Step 5: When it is felt that the pressing force between the first pressing plate and the PCB is not enough, continue to rotate the suction control box to make the abutment plate on one side of the fixed shaft further abut against the support rod of the operating frame. Under the support of the support rod, the flip cover is further flipped and pressed down. Another second elastic abutment strip of the fixed shaft is engaged and abutted with the first elastic abutment strip to maintain the position of the flip cover. The first pressing plate applies a greater downward clamping force to the PCB.

[0023] Step six: When two negative pressure suction connectors are set on the welding workbench of the PCB board, the two access ports of the operating frame are respectively connected to the two negative pressure suction connectors. While fixing the position of the operating frame, when the negative pressure suction connector generates negative pressure suction, the smoke at the welding position of the PCB board with the suction hole surfaces facing each other can be sucked through the fixed axis and the suction control box.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Two first magnetic slides for placing PCB boards are horizontally arranged at the upper end of the operating frame through the first magnetic plate. They can be quickly adapted and adjusted for PCB boards of different sizes, and then cooperated with the clamping component that can also be adaptively adjusted. When performing welding auxiliary positioning for different PCB boards, it is convenient to operate and has a wide range of applications. With the cooperation of the suction and fixing component, the support positioning is stable and reliable, and the smoke generated by the welding of the PCB boards can be handled in time. It has complete functions and is safe to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle;

[0027] Figure 2 For the present invention Figure 1 Schematic diagram of part A;

[0028] Figure 3 For the present invention Figure 1 Schematic diagram of part B;

[0029] Figure 4 It is a schematic diagram of the structure of the present invention from a second viewing angle;

[0030] Figure 5 For the present invention Figure 4 Schematic diagram of the C part;

[0031] Figure 6 This is a schematic diagram of the structure of the lifting rod of the present invention;

[0032] Figure 7 For the present invention Figure 6 Schematic diagram of the D part;

[0033] Figure 8This is a schematic diagram of the structure of the second magnetic attraction plate of the present invention;

[0034] Fig. 9 It is a partial side-cut schematic diagram of the structure of the present invention;

[0035] Fig.10 For the present invention Fig. 9 Schematic diagram of part E;

[0036] Fig.11 It is an exploded schematic diagram of the cooperation between the first pressing plate, the suction control box and the first magnetic sliding seat of the present invention.

[0037] In the figure: operating frame 1, first magnetic plate 2, first magnetic slide 3, PCB board 4, threaded connection hole 5, lifting top rod 6, positioning groove 7, flip cover 8, second magnetic plate 9, second magnetic slide 10, first pressure plate 11, docking groove 12, matching strip 13, storage groove 14, suction control box 15, fixed shaft 16, arc-shaped fixed groove 17, first elastic abutment strip 18, second elastic abutment strip 19, stabilizing guide groove 20, matching joint 21, adapter groove 22, access port 23, suction hose 24, suction hole 25, support rod 26, abutment plate 27, second pressure plate 28. DETAILED DESCRIPTION

[0038] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 11 , the present invention provides the following technical solutions:

[0040] Embodiment 1: A positioning jig for welding processing of a computer host PCB board comprises an operating frame 1, wherein a first magnetic plate 2 is horizontally arranged on one side of the lower end of the operating frame 1, two first magnetic slides 3 are slidingly adsorbed on both sides of the first magnetic plate 2, and a PCB board 4 is horizontally overlapped on the upper ends of the two first magnetic slides 3, and positioning grooves 7 are provided on the upper ends of the two first magnetic slides 3 on the sides close to each other, and the two sides of the PCB board 4 are horizontally inserted into the two positioning grooves 7 respectively, and the depth of the positioning grooves 7 is less than the thickness of the PCB board 4, and the width of the positioning grooves 7 is equal to the installation edge width of the PCB board 4. When the computer host PCB board is installed, a certain position needs to be reserved on the side for later fixing with the computer. When the PCB board 4 is placed above the first magnetic slide 3, it is overlapped through the existing reserved position, and the electrical components of the PCB board 4 will not cause unstable placement.

[0041] The first magnetic plate 2 is symmetrically provided with a plurality of threaded connection holes 5, and the upper ends of the plurality of threaded connection holes 5 are vertically plugged with lifting rods 6 through threads, and the upper ends of the plurality of lifting rods 6 are respectively abutted against the lower ends of the PCB board 4, and the arrangement of the lifting rods 6 is offset from the position of the electrical components welded at the lower end of the PCB board 4, so as to stably support the PCB board 4 and keep the PCB board 4 flat;

[0042] A clamping assembly, which is movably arranged on one side of the operating frame 1, and the clamping assembly includes a flip cover 8 and two second magnetic slides 10. The two second magnetic slides 10 are slidably adsorbed on both sides of the flip cover 8. A first pressing plate 11 is horizontally arranged on one side of the two second magnetic slides 10, and the two first pressing plates 11 are respectively in contact with the upper ends of the two first magnetic slides 3 and press the upper ends of the PCB board 4. Two hinge shafts are horizontally symmetrically arranged on both sides of the flip cover 8, and the two hinge shafts rotate and penetrate the two sides of the operating frame 1 respectively. Two adjustment slots are symmetrically arranged on both sides of the flip cover 8, and two second magnetic plates 9 are horizontally symmetrically arranged in the two adjustment slots. The two second magnetic slides 10 are respectively placed in the two adjustment slots and movably adsorb and sleeve the two second magnetic plates 9. The first magnetic plate 2 and the second magnetic plate 9 are both strong magnets with iron cores inside. Under the condition of ensuring the strength of the first magnetic plate 2 and the second magnetic plate 9, the positions of the first magnetic slide 3 and the second magnetic slide 10 are adaptively self-fixed;

[0043] The first pressing plate 11 is arranged on the side of the second magnetic attraction slide 10 close to the first magnetic attraction slide 3, and the upper end of the first magnetic attraction slide 3 is vertically provided with a matching strip 13, and the first pressing plate 11 is provided with a docking groove 12. When the lower end of the first pressing plate 11 is in contact with the upper end of the first magnetic attraction slide 3, the matching strip 13 penetrates the plug-in docking groove 12, and the two side surfaces of the upper end of the matching strip 13 are inclined surface structures. A second pressing plate 28 is horizontally provided at the center of one side of the flip cover 8 close to the PCB board 4, and the lower end of the second pressing plate 28 is pressed and fitted with one side of the upper end of the PCB board 4. Scale lines can be set on the first magnetic attraction plate 2 and the second magnetic attraction plate 9 to facilitate the position adjustment of the first magnetic attraction slide 3 and the second magnetic attraction slide 10 to adapt to the different lengths of the PCB board 4. In addition, the width of the first pressing plate 11 is equal to the width of the first magnetic attraction slide 3. While pressing and fixing the side of the PCB board 4, it will not interfere with the electrical components on the upper end of the PCB board 4.

[0044] In this embodiment, the two sides of the PCB board 4 are respectively inserted into the positioning grooves 7 of the two first magnetic slides 3, and the upper ends of a number of lifting rods 6 are respectively abutted against the lower end of the PCB board 4 for support. The flip cover 8 is rotated by the hinge shaft, and the flip cover 8 controls the second magnetic slide 10 and the first pressure plate 11 to flip. The lower end of the first pressure plate 11 contacts the upper end of the first magnetic slide 3. The first pressure plate 11 cooperates with the positioning grooves 7 to clamp the two sides of the PCB board 4, and the docking grooves 12 are sleeved on the mating strips 13. When the second magnetic slide 10 and the first pressure plate 11 cannot move, the first magnetic slide 3 is further fixed by the connection between the docking grooves 12 and the mating strips 13.

[0045] Embodiment 2: On the basis of embodiment 1, a suction fixing component is provided to further strengthen the magnetic fixation of the second magnetic suction slide 10 and the first magnetic suction slide 3, so as to maintain the placement stability of the PCB board 4, and at the same time, increase the smoke adsorption function of the suction control box 15, the suction fixing component is provided at the upper end of the flip cover 8, the suction fixing component includes a suction control box 15, and the two sides of the suction control box 15 are horizontally symmetrically provided with two fixed shafts 16, the upper ends of the two second magnetic suction slides 10 are provided with arc-shaped fixed grooves 17, and the two fixed shafts 16 are respectively horizontally movable and penetrate the two arc-shaped fixed grooves 17 and the operating frame 1, and the flip cover 8 is provided with a suction fixing component. A storage slot 14 is provided at the center of the upper end of the rotating cover plate 8 between the two adjustment slots, and the suction control box 15 is movably arranged in the storage slot 14. One side of the two fixed shafts 16 movably penetrates the two sides of the storage slot 14 respectively. Both sides of the operating frame 1 are provided with stable guide slots 20, and the fixed shaft 16 penetrates the two sides of the storage slot 14 and movably penetrates the two stable guide slots 20 respectively. The stable guide slots 20 are arc-shaped structures, and the virtual axes of the two stable guide slots 20 are coaxially arranged with the hinge axis of the flip cover plate 8. When the flip cover plate 8 controls the first pressure plate 11 to abut against the first magnetic suction slide seat 3, the two sides of the two fixed shafts 16 are respectively inserted into the two stable guide slots 20;

[0046] A first elastic abutment strip 18 is horizontally provided at the lower end of the arc-shaped fixed groove 17 of the second magnetic suction slide 10, a groove is provided on one side of the fixed shaft 16 located in the adjustment groove, and a plurality of second elastic abutment strips 19 are symmetrically provided on one side of the groove. When the suction control box 15 is tilted, the first elastic abutment strip 18 is meshed and abutted with the second elastic abutment strip 19, a support rod 26 is horizontally provided on one side of the stable guide groove 20 of the operating frame 1, an abutment plate 27 is horizontally provided on one side of the fixed shaft 16 penetrating the stable guide groove 20, a shunt cavity is provided in the suction control box 15, and a plurality of suction holes 25 are provided in the shunt cavity penetrating one side of the suction control box 15, when the first pressing plate When the first magnetic slider 11 is in contact with the upper end of the first magnetic slider 3, the suction hole 25 of the suction control box 15 points to the PCB board 4, and one side of the abutting plate 27 abuts against the lower end of the supporting rod 26. At this time, the abutting plate 27 is abutted by the supporting rod 26, and the flip cover 8 cannot rotate. The first pressing plate 11 cooperates with the first magnetic slider 3 to press and fix the PCB board 4. At this time, there is still a certain distance between the lower end of the fixed shaft 16 and the lower end of the stable guide groove 20. When the suction control box 15 controls the fixed shaft 16 to continue to rotate, the abutting plate 27 is abutted by the supporting rod 26, and the flip cover 8 is further lowered, so that the first pressing plate 11 applies a greater pressing force to the PCB board 4.

[0047] When the PCB board 4 is not combined with the operating frame 1, the flip cover 8 is in a flipped and tilted posture. At this time, the suction control box 15 is inserted into the storage groove 14, and the abutment plate 27 is in a tilted posture relative to the flip cover 8. When the flip cover 8 rotates and fixes the PCB board 4 through the first pressure plate 11, the abutment plate 27 will not contact the supporting rod 26 during the flipping process of the flip cover 8. When the flip cover 8 is placed horizontally, the suction control box 15 is rotated by the fixed shaft 16, and the suction control box 15 is flipped out of the storage groove 14. At this time, the rotation of the fixed shaft 16 drives the abutment plate 27 to move to one side of the supporting rod 26 and abut against the lower end of the supporting rod 26.

[0048] In this embodiment, the suction control box 15 is rotated by the fixed shaft 16 so that one side of the suction hole 25 of the suction control box 15 is tilted to point to the PCB board 4. As the fixed shaft 16 and the suction control box 15 rotate, a plurality of second elastic abutment strips 19 on one side of the fixed shaft 16 abut and engage with the first elastic abutment strips 18. Under the deformation and compression abutment of the second elastic abutment strips 19 and the first elastic abutment strips 18, the second magnetic suction slide 10 maintains a fixed posture. When the suction control box 15 is horizontally set, the first elastic abutment strips 19 and the first elastic abutment strips 18 are deformed and pressed. The abutment strip 18 is placed in the groove of the fixed shaft 16 on the side where the second elastic abutment strip 19 is not provided. At this time, the second magnetic slide 10 can move horizontally normally. When the second elastic abutment strip 19 abuts and engages with the first elastic abutment strip 18, the second magnetic slide 10 cannot move under the action of the friction force of the pressed abutment. Then, the first elastic abutment strip 18 and the second elastic abutment strip 19 are used to strengthen the position fixation of the second magnetic slide 10 and the first magnetic slide 3, so as to keep the PCB board 4 supported and pressed stably.

[0049] Embodiment 3: On the basis of embodiment 2, the diversion cavity of the suction control box 15 passes through the fixed shaft 16 and is provided with a first pipe connection groove. Two matching joints 21 are symmetrically provided on both sides of the operating frame 1. A transfer groove 22 is provided in the matching joint 21. An access port 23 and a second pipe connection groove are respectively provided at the lower end and one side of the transfer groove 22. A suction hose 24 is respectively inserted between the second pipe connection grooves of the two matching joints 21 and the first pipe connection grooves of the two fixed shafts 16. When it is necessary to pre-treat the smoke generated by welding the PCB board 4, the matching joint 21 is connected to the two negative pressure suction devices, and the smoke generated by welding the PCB board 4 is adsorbed at the early stage to avoid the health impact of the workers during the rising and spreading of the smoke.

[0050] A processing technology for welding a computer host PCB board comprises the following steps:

[0051] Step 1: According to the width of the PCB board 4 to be processed at this stage, slide the first magnetic slide 3 and the second magnetic slide 10 along the first magnetic plate 2 and the second magnetic plate 9 to a suitable position respectively, and keep the magnetic attraction self-fixed, and according to the layout of the electrical components at the bottom of the PCB board 4, insert a number of lifting rods 6 through threads;

[0052] Step 2: Insert both sides of the PCB board 4 into the positioning grooves 7 of the two first magnetic slides 3 respectively, and the upper ends of the plurality of lifting rods 6 are respectively abutted against the lower ends of the PCB board 4 for support;

[0053] Step 3: The flip cover plate 8 is rotated by the hinge shaft, and the flip cover plate 8 controls the second magnetic slide 10 and the first pressure plate 11 to flip, and the lower end of the first pressure plate 11 contacts the upper end of the first magnetic slide 3, and the first pressure plate 11 cooperates with the positioning groove 7 to clamp the two sides of the PCB board 4, and the docking groove 12 is sleeved on the docking strip 13;

[0054] Step 4: At this time, the suction control box 15 is rotated by the fixed shaft 16 so that one side of the suction hole 25 of the suction control box 15 is tilted to point toward the PCB board 4. As the fixed shaft 16 and the suction control box 15 rotate, a plurality of second elastic abutting strips 19 on one side of the fixed shaft 16 abut and engage with the first elastic abutting strips 18. Under the deformation and compression abutment of the second elastic abutting strips 19 and the first elastic abutting strips 18, the second magnetic suction slide 10 maintains a fixed posture, and then the first magnetic suction slide 3 is also strengthened and fixed accordingly under the engagement of the matching strip 13 and the first pressure plate 11;

[0055] Step 5: When it is felt that the pressing force between the first pressing plate 11 and the PCB board 4 is not enough, continue to rotate the suction control box 15, so that the abutment plate 27 on one side of the fixed shaft 16 further abuts against the support rod 26 of the operating frame 1, and under the support of the support rod 26, the flip cover 8 is further flipped and pressed down, and the other second elastic abutment strip 19 of the fixed shaft 16 is engaged and abutted with the first elastic abutment strip 18 to maintain the position of the flip cover 8, and the first pressing plate 11 applies a greater downward clamping force to the PCB board 4;

[0056] Step six: When two negative pressure suction connectors are set on the welding workbench of the PCB board 4, the two access ports 23 of the operating frame 1 are respectively connected to the two negative pressure suction connectors. While fixing the position of the operating frame 1, when the negative pressure suction connector generates negative pressure suction, the smoke at the welding position of the PCB board 4 facing the suction hole 25 can be sucked through the fixed shaft 16 and the suction control box 15.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for welding computer host PCB board, It is characterized in that The positioning fixture for welding the computer host PCB board includes: An operating frame (1), wherein a first magnetic plate (2) is horizontally arranged on one side of the lower end of the operating frame (1), two first magnetic slide seats (3) are slidably adsorbed on both sides of the first magnetic plate (2), and a PCB board (4) is horizontally overlapped at the upper ends of the two first magnetic slide seats (3); A clamping assembly, wherein the clamping assembly is movably arranged on one side of the operating frame (1), and the clamping assembly comprises a flip cover (8) and two second magnetic slides (10), wherein the two second magnetic slides (10) are slidably adsorbed on both sides of the flip cover (8), and a first pressing plate (11) is horizontally arranged on one side of the two second magnetic slides (10), and the two first pressing plates (11) are respectively in contact with the upper ends of the two first magnetic slides (3) and clamp both sides of the upper end of the PCB board (4); A suction fixing component, the suction fixing component is arranged at the upper end of the flip cover (8), the suction fixing component comprises a suction control box (15), two fixing shafts (16) are horizontally symmetrically arranged on both sides of the suction control box (15), the upper ends of the two second magnetic suction slides (10) are each provided with an arc-shaped fixing groove (17), and the two fixing shafts (16) are respectively horizontally movable and penetrate the two arc-shaped fixing grooves (17) and the operating frame (1); A positioning groove (7) is provided at the upper ends of the adjacent sides of the two first magnetic suction slide seats (3), and the two sides of the PCB board (4) are horizontally inserted into the two positioning grooves (7), respectively, the depth of the positioning groove (7) is less than the thickness of the PCB board (4), and the width of the positioning groove (7) is equal to the installation edge width of the PCB board (4); The first magnetic attraction plate (2) is symmetrically provided with a plurality of threaded connection holes (5), the upper ends of the plurality of threaded connection holes (5) are provided with lifting rods (6) through vertical threaded insertion, and the upper ends of the plurality of lifting rods (6) are respectively in contact with the lower end of the PCB board (4); The first pressing plate (11) is arranged on a side of the second magnetic attraction slide (10) close to the first magnetic attraction slide (3), and a matching strip (13) is vertically arranged on the upper end of the first magnetic attraction slide (3). A docking groove (12) is opened on the first pressing plate (11). When the lower end of the first pressing plate (11) is in contact with the upper end of the first magnetic attraction slide (3), the matching strip (13) penetrates the plug-in docking groove (12), and the two side surfaces of the upper end of the matching strip (13) are inclined surface structures. A second pressing plate (28) is horizontally arranged at the center of one side of the flip cover (8) close to the PCB board (4), and the lower end of the second pressing plate (28) is pressed tightly against one side of the upper end of the PCB board (4); A first elastic abutment strip (18) is horizontally arranged at the lower end of the arc-shaped fixed groove (17) of the second magnetic attraction slide seat (10); a groove is provided on one side of the fixed shaft (16) located in the adjustment groove; a plurality of second elastic abutment strips (19) are symmetrically arranged on one side of the groove; when the suction control box (15) is tilted, the first elastic abutment strip (18) engages and abuts against the second elastic abutment strip (19).

2. A positioning jig for welding computer host PCB board according to claim 1, Features: Two hinge shafts are horizontally symmetrically arranged on both sides of the flip cover plate (8), and the two hinge shafts rotate and penetrate the two sides of the operating frame (1) respectively. Two adjustment slots are symmetrically arranged on both sides of the flip cover plate (8), and two second magnetic attraction plates (9) are horizontally symmetrically arranged in the two adjustment slots. The two second magnetic attraction slide seats (10) are respectively placed in the two adjustment slots and movably absorb and sleeve the two second magnetic attraction plates (9).

3. A positioning jig for welding computer host PCB board according to claim 2, Features: The flip cover (8) is provided with a storage groove (14) at the center of the upper end between the two adjustment grooves, the suction control box (15) is movably arranged in the storage groove (14), one side of the two fixed shafts (16) respectively movably penetrates the two sides of the storage groove (14), both sides of the operating frame (1) are provided with stabilizing guide grooves (20), and the fixed shaft (16) penetrates the two sides of the storage groove (14) and movably penetrates the two stabilizing guide grooves (20), and the stabilizing guide grooves (20) are arc-shaped structures.

4. A positioning jig for welding a computer host PCB board according to claim 3, Features: The operating frame (1) is horizontally provided with a support rod (26) on one side of the stabilizing guide groove (20), and a contact plate (27) is horizontally provided on one side of the fixed shaft (16) penetrating the stabilizing guide groove (20). A diversion cavity is provided in the suction control box (15), and a plurality of suction holes (25) are provided in the diversion cavity penetrating one side of the suction control box (15). When the first pressing plate (11) is in contact with the upper end of the first magnetic suction slide seat (3), the suction holes (25) of the suction control box (15) point to the PCB board (4), and one side of the contact plate (27) is in contact with the lower end of the support rod (26).

5. A positioning jig for welding computer host PCB board according to claim 4, Features: The diversion cavity of the suction control box (15) penetrates the fixed shaft (16) and is provided with a first pipe connection groove. Two matching joints (21) are symmetrically provided on both sides of the operating frame (1). A transfer groove (22) is provided in the matching joint (21). An access port (23) and a second pipe connection groove are respectively provided at the lower end and one side of the transfer groove (22). A suction hose (24) is inserted between the second pipe connection grooves of the two matching joints (21) and the first pipe connection grooves of the two fixed shafts (16).

6. A processing technology for welding computer host PCB board, Features: The processing technology for welding the computer host PCB board is applied to the positioning fixture for welding the computer host PCB board according to any one of claims 1 to 5, comprising the following steps: Step 1: According to the width of the PCB board (4) to be processed at the current stage, the first magnetic attraction slide (3) and the second magnetic attraction slide (10) are slid along the first magnetic attraction plate (2) and the second magnetic attraction plate (9) to suitable positions respectively, and the magnetic attraction is kept self-fixed, and according to the layout of the electrical components at the bottom of the PCB board (4), a plurality of lifting rods (6) are inserted through threads; Step 2: inserting the two sides of the PCB board (4) into the positioning grooves (7) of the two first magnetic suction slide seats (3) respectively, and the upper ends of a plurality of lifting rods (6) are respectively abutted against the lower ends of the PCB board (4) for support; Step 3: The flip cover plate (8) is rotated by the hinge shaft, and the flip cover plate (8) controls the second magnetic slide seat (10) and the first pressure plate (11) to flip, and the lower end of the first pressure plate (11) contacts the upper end of the first magnetic slide seat (3), and the first pressure plate (11) cooperates with the positioning groove (7) to clamp the two sides of the PCB board (4), and the docking groove (12) is sleeved on the docking strip (13); Step 4: At this time, the suction control box (15) is rotated by the fixed shaft (16) so that one side of the suction hole (25) of the suction control box (15) is tilted to point toward the PCB board (4). As the fixed shaft (16) and the suction control box (15) rotate, a plurality of second elastic abutment strips (19) on one side of the fixed shaft (16) abut and engage with the first elastic abutment strips (18). Under the deformation and compression abutment of the second elastic abutment strips (19) and the first elastic abutment strips (18), the second magnetic attraction slide (10) maintains a fixed posture, and then the first magnetic attraction slide (3) is also strengthened and fixed accordingly under the engagement of the matching strip (13) and the first pressure plate (11); Step 5: When it is felt that the pressing force between the first pressing plate (11) and the PCB board (4) is insufficient, the suction control box (15) is continuously rotated so that the abutment plate (27) on one side of the fixed shaft (16) further abuts against the support rod (26) of the operating frame (1). Under the support of the support rod (26), the flip cover plate (8) is further flipped and pressed downward, and the other second elastic abutment strip (19) of the fixed shaft (16) is engaged with the first elastic abutment strip (18) to hold the flip cover plate (8) in position. The first pressing plate (11) applies a greater downward clamping force to the PCB board (4). Step 6: When two negative pressure suction connectors are provided on the welding workbench of the PCB board (4), the two access ports (23) of the operating frame (1) are respectively sleeved onto the two negative pressure suction connectors, and the position of the operating frame (1) is fixed. When the negative pressure suction connector generates negative pressure suction, smoke and dust at the welding position of the PCB board (4) facing the suction hole (25) can be sucked through the fixed shaft (16) and the suction control box (15).

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