PCBA (printed circuit board assembly) solder paste printing equipment

Abstract

The invention discloses a PCBA board solder paste printing device, and relates to the technical field of PCBA board processing, the PCBA board solder paste printing device comprises a jig board and a clamping piece, the jig board is provided with a first positioning part used for positioning a PCBA board and a second positioning part located on the periphery of the PCBA board, the second positioning part extends in the first direction perpendicular to the PCBA board, and the clamping piece is arranged on the first positioning part. The periphery of the steel sheet abuts against the second positioning part and is movably arranged in the first direction relative to the second positioning part, and the second positioning part can limit the steel sheet and guide the steel sheet to move in the first direction; the clamping piece is movably arranged in the first direction, the clamping piece clamps the outer edge of the steel sheet and enables the steel sheet to be parallel to the PCBA board, the steel sheet and the clamping piece are relatively fixed in the first direction, the clamping piece drives the steel sheet to be attached to the PCBA board at the preset position, and the technical problem that the steel sheet and the PCBA board are prone to dislocation in the alignment or separation process of the steel sheet and the PCBA board is solved. And the steel sheet and the PCBA board can be quickly and accurately positioned.

Description

Technical Field

[0001] The present invention relates to the technical field of PCBA board processing, and particularly relates to a solder paste printing device for PCBA boards. Background Art

[0002] During the solder paste printing process of a PCBA board, it is necessary to accurately align the solder paste stencil with the PCBA board, and then clamp the stencil and the PCBA board together with a fixture or fix the stencil and the PCBA board together with adhesive tape. Finally, the solder paste is brushed on the stencil, and through the relief holes on the stencil, the solder paste remains at the positions on the PCBA board that need to be soldered.

[0003] However, during the alignment or separation process of the stencil and the PCBA board, the stencil and the PCBA board are prone to dislocation, resulting in incorrect solder paste printing positions or scratching of the solder paste, etc., affecting the subsequent soldering effect.

[0004] Therefore, how to avoid the dislocation of the stencil and the PCBA board during the alignment and separation process of the stencil and the PCBA board is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a solder paste printing device for PCBA boards, which can achieve rapid and precise positioning of the stencil and the PCBA board, avoid displacement between the stencil and the PCBA board, and improve the printing effect of the solder paste.

[0006] To achieve the above purpose, the present invention provides a solder paste printing device for PCBA boards, including:

[0007] A jig plate, on which a first positioning portion for positioning the PCBA board is provided, and a second positioning portion located on the outer periphery of the PCBA board is provided, and the second positioning portion extends along a first direction perpendicular to the PCBA board;

[0008] A clamping member, the clamping member is movably arranged along the first direction, the clamping member clamps the outer edge of the stencil and keeps the stencil parallel to the PCBA board, the stencil and the clamping member are relatively fixed in the first direction, the outer periphery of the stencil abuts against the second positioning portion, and is movably arranged relative to the second positioning portion in the first direction, and the stencil fits with the PCBA board at a preset position.

[0009] The beneficial effects of the present invention are as follows. The PCBA board is positioned on the jig board through the first positioning portion, ensuring the position accuracy of the PCBA board. A second positioning portion extending in a direction perpendicular to the PCBA board is provided on the outer periphery of the PCBA board. The outer periphery of the steel sheet is circumferentially abutted against the second positioning portion to achieve the positioning of the steel sheet. After both the steel sheet and the PCBA board are positioned, the position where the solder paste needs to be printed on the PCBA board is aligned with the holes of the steel sheet. The clamping member can keep the steel sheet parallel to the PCBA board and drive the steel sheet to approach or move away from the PCBA board. Under the limiting action of the second positioning portion, the steel sheet moves in a direction perpendicular to the PCBA board and fits with the PCBA board at a preset position. Thus, during the alignment and separation of the steel sheet and the PCBA board, relative displacement can only occur in the direction perpendicular to the PCBA board, and misalignment will not occur in the plane direction of the PCBA board, improving the printing effect of the solder paste. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 Schematic diagram of the three-dimensional structure of the PCBA board solder paste printing equipment provided by the embodiment of the present invention;

[0012] Figure 2 Schematic diagram of the structure of the PCBA board and the steel sheet in the separated state provided by the embodiment of the present invention;

[0013] Figure 3 Schematic diagram of the relative positions of the steel sheet, the PCBA board, the positioning board, and the jig board provided by the embodiment of the present invention;

[0014] Figure 4 Schematic diagram of the structure of the baffle provided by the embodiment of the present invention;

[0015] Figure 5 Schematic diagram of the linkage structure of the positioning board and the baffle provided by the embodiment of the present invention;

[0016] Figure 6 Schematic diagram of the linkage structure of the positioning board and the push rod provided by the embodiment of the present invention;

[0017] Figure 7 Schematic diagram of the cooperation structure of the third drive board and the guide groove provided by the embodiment of the present invention.

[0018] In the figure: 1 - jig board; 2 - steel sheet; 3 - clamping member; 4 - PCBA board; 5 - bottom plate; 6 - aggregate board; 7 - positioning board;

[0019] 11 - Second positioning part; 12 - Positioning groove; 13 - Avoidance part; 111 - Second positioning frame; 131 - First avoidance groove; 132 - Second avoidance groove;

[0020] 31 - Chuck; 32 - Connecting plate; 33 - Second driving part; 34 - Support plate; 35 - Fixed block; 36 - Guide rod; 37 - Second spring; 311 - Clamping groove;

[0021] 61 - Inclined part; 62 - Horizontal part;

[0022] 71 - First positioning frame; 72 - Baffle; 73 - Notch; 74 - First driving part; 75 - Mounting plate; 76 - First spring; 77 - Second driving plate; 721 - Positioning section; 722 - Connection section; 723 - First driving plate;

[0023] 81 - First vertical plate; 82 - First rotating shaft; 83 - First driving wheel; 84 - Second driving wheel; 85 - Third driving wheel; 86 - Synchronous belt;

[0024] 91 - Second vertical plate; 92 - Second rotating shaft; 93 - Third rotating shaft; 94 - Fourth driving wheel; 95 - Fifth driving wheel; 96 - Sixth driving wheel; 97 - Third driving plate; 98 - Push rod;

[0025] 101 - Fixed plate; 102 - T-shaped plate; 103 - Guide groove. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0027] The terms "including" and "having" in the specification of the present invention and the above accompanying drawings, as well as any deformations related to "including" and "having", are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units not listed.

[0028] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0029] Next, a PCBA board solder paste printing device provided by the embodiments of the present invention will be introduced in detail. Please refer to Figures 1 to 7, the device includes a jig plate 1 and a clamping member 3. The jig plate 1 serves as the main carrier for positioning the PCBA board 4 and the steel sheet 2. On the jig plate 1, a first positioning portion for positioning the PCBA board 4 is provided. There are various ways to set the first positioning portion, such as vacuum adsorption, limit groove positioning, limit post positioning, pressing plate positioning, etc. There is no excessive limitation here. It is only necessary to ensure that the PCBA board 4 can be accurately positioned on the jig plate 1, and all fall within the protection scope of the present invention. It should be noted that when the PCBA board 4 is positioned by the first positioning portion, it should be ensured that the side of the PCBA board 4 that needs to be printed with solder paste is exposed, providing a necessary condition for the fitting of the steel sheet 2 and the PCBA board 4.

[0030] On the jig plate 1, a second positioning portion 11 located on the outer periphery of the PCBA board 4 is also provided. The second positioning portion 11 extends along a first direction perpendicular to the PCBA board 4. Specifically, one end of the second positioning portion 11 is provided on the top surface of the jig plate 1, and the other end extends away from the top surface of the jig plate 1 along the first direction, thereby forming a second positioning portion 11 with a certain extension length. On this basis, the side wall of the second positioning portion 11 facing the PCBA board 4 is parallel to the first direction. Wherein, the first direction is the direction perpendicular to the PCBA board 4 or perpendicular to the board surface of the PCBA board 4 after the PCBA board 4 is positioned on the jig plate 1.

[0031] The clamping member 3 can be movably arranged along the first direction. The clamping member 3 can clamp the outer edge of the steel sheet 2. The part of the steel sheet 2 clamped by the clamping member 3 does not need to be fitted with the PCBA board 4. It is only necessary to ensure that the part of the steel sheet 2 with a hole in the middle is fitted with the PCBA board 4. When the clamping member 3 clamps the steel sheet 2, the steel sheet 2 can be kept parallel to the PCBA board 4. At the same time, the clamping member 3 is an active member and can provide power for the steel sheet 2 to approach or move away from the PCBA board 4.

[0032] In addition, when the clamping member 3 clamps the steel sheet 2, it is not necessary to provide sufficient clamping force to ensure that the clamping member 3 and the steel sheet 2 do not have relative displacement in the direction. It is only necessary to ensure that the clamping member 3 can limit the displacement of the steel sheet 2 in the first direction, that is, the steel sheet 2 and the clamping member 3 are relatively fixed in the first direction. In the direction parallel to the steel sheet 2, whether there is relative displacement between the steel sheet 2 and the clamping member 3 is not overly restricted here.

[0033] On the basis that the steel sheet 2 and the clamping member 3 are relatively fixed in the first direction, when the clamping member 3 moves in the first direction, the steel sheet 2 can also move synchronously in the first direction; when the steel sheet 2 gradually approaches the PCBA board 4, at a certain position (the position before the steel sheet 2 is attached to the PCBA board 4), the outer periphery of the steel sheet 2 abuts against the side wall of the second positioning portion 11, and under the limiting and guiding action of the second positioning portion 11, the steel sheet 2 can only move in the first direction between this position and the position where it is attached to the PCBA board 4, so as to ensure that before or after the steel sheet 2 is attached to or detached from the PCBA board 4, the steel sheet 2 and the PCBA board 4 will not be misaligned in the board surface direction, and the printing effect of the solder paste is guaranteed.

[0034] Combining the above embodiments, the present invention positions the PCBA board 4 on the jig board 1 through the first positioning portion to ensure the position accuracy of the PCBA board 4. A second positioning portion 11 extending in a direction perpendicular to the PCBA board 4 is provided on the outer periphery of the PCBA board 4. The outer periphery of the steel sheet 2 abuts against the circumference of the second positioning portion 11 to realize the positioning of the steel sheet 2. After both the steel sheet 2 and the PCBA board 4 are positioned, the position where the solder paste needs to be printed on the PCBA board 4 is aligned with the holes of the steel sheet 2; the clamping member 3 can keep the steel sheet 2 parallel to the PCBA board 4 and drive the steel sheet 2 to approach or move away from the PCBA board 4. Under the limiting action of the second positioning portion 11, the steel sheet 2 moves in a direction perpendicular to the PCBA board 4 and is attached to the PCBA board 4 at a preset position, so that only relative displacement can occur in the direction perpendicular to the PCBA board 4 during the alignment and detachment of the steel sheet 2 and the PCBA board 4, and no misalignment will occur in the board surface direction of the PCBA board 4, improving the printing effect of the solder paste.

[0035] It should be noted that the holes on the steel sheet 2 are pre-opened holes, and each hole can correspond to the position where the solder paste needs to be printed on the PCBA board 4; after the steel sheet 2 is positioned by the second positioning portion 11 and the PCBA board 4 is positioned by the first positioning portion, in the first direction, the holes on the steel sheet 2 are precisely corresponding to the positions where the solder paste needs to be printed on the PCBA board 4, so as to realize the rapid and precise positioning of the steel sheet 2 and the PCBA board 4.

[0036] In some embodiments, the second positioning portion 11 includes a second positioning frame 111 provided on the top surface of the jig board 1. The second positioning frame 111 can be a continuous or discontinuous frame structure. An accommodation space for accommodating the steel sheet 2 is formed by enclosing the frame structure of the second positioning frame 111; when the steel sheet 2 is placed in the second positioning frame 111, it is only necessary to ensure that the second positioning frame 111 has sufficient frame structure to limit the outer periphery of the steel sheet 2, so as to limit and constrain the steel sheet 2 in other directions except the first direction, and ensure that the steel sheet 2 is fixedly arranged relative to the second positioning frame 111 in any direction in its plane, where the above-mentioned any direction includes the direction of forming translation and the direction of forming rotation, etc.

[0037] In addition, considering that before the steel sheet 2 is attached to the PCBA board 4, the outer periphery of the steel sheet 2 first needs to abut against the side wall of the second positioning frame 111, the second positioning frame 111 can be made to extend beyond the attachment surface of the PCBA board 4 and the steel sheet 2 in the first direction, ensuring that before the steel sheet 2 is attached to the PCBA board 4, the second positioning frame 111 first restricts and positions it; similarly, after the steel sheet 2 is detached from the PCBA board 4, the steel sheet 2 can also be restricted by the second positioning frame 111 by a certain distance to prevent the steel sheet 2 and the PCBA board 4 from being misaligned within this distance. Among them, the distance by which the steel sheet 2 is restricted by the second positioning frame 111 should ensure that the solder paste on the steel sheet 2 and the PCBA board 4 is completely separated, avoiding the solder paste on the PCBA board 4 being scraped by the steel sheet 2 due to insufficient restriction distance.

[0038] As mentioned above, the clamping member 3 is provided on the one hand to keep the steel sheet 2 parallel to the PCBA board 4, and on the other hand to restrict the steel sheet 2 in the first direction to ensure that the clamping member 3 and the steel sheet 2 can move synchronously in the first direction. Although the clamping member 3 does not need to completely clamp the steel sheet 2, the method of completely clamping the steel sheet 2 can also achieve the technical effects of the present invention, so it also falls within the protection scope of the present invention.

[0039] However, for the method of completely clamping the steel sheet 2 by the clamping member 3, the steel sheet 2 and the second positioning frame 111 need to maintain a high alignment accuracy. In actual operation, due to factors such as processing errors and assembly errors, the alignment efficiency of the steel sheet 2 and the second positioning frame is relatively low; therefore, the present invention adopts the method of rough positioning the steel sheet 2 by the clamping member 3 and fine positioning the steel sheet 2 by the second positioning frame 111, so that the steel sheet 2 can be quickly and accurately positioned by the second positioning frame 111.

[0040] Specifically, the clamping member 3 includes a plurality of chucks 31 distributed on the outer periphery of the steel sheet 2. A clamping groove 311 for clamping the steel sheet 2 is provided on the side of the chuck 31 facing the steel sheet 2. When the clamping groove 311 clamps the steel sheet 2, the two clamping walls of the clamping groove 311 can respectively abut against the two sides of the steel sheet 2, so that the clamping groove 311 and the steel sheet 2 are limited and clamped in the first direction, realizing the rough positioning of the steel sheet 2 by the clamping member 3; however, the clamping wall does not apply a clamping force to the steel sheet 2 or applies a small clamping force to the steel sheet 2, ensuring that the steel sheet 2 can move in a direction parallel to the plane where the steel sheet 2 is located in the clamping groove 311. When the clamping wall does not apply a clamping force to the steel sheet 2, the movement of the steel sheet 2 in the clamping groove 311 is more flexible and smooth, and it is easier to adjust the alignment of the steel sheet 2 and the second positioning frame 111; when the clamping wall applies a small clamping force to the steel sheet 2, the friction between the steel sheet 2 and the clamping wall can be increased, making the steel sheet 2 more stable in the clamping groove 311, which is convenient for improving the rough positioning effect of the clamping member 3 on the steel sheet 2.

[0041] In addition, to ensure that the clamping member 3 can make the steel sheet 2 parallel to the PCBA board 4, the clamping grooves 311 of multiple chucks 31 can be arranged in the same plane parallel to the PCBA board 4. Or rather, the upper clamping walls of multiple clamping grooves 311 are in the same plane parallel to the PCBA board 4, and the lower clamping walls of multiple clamping grooves 311 are in the same plane parallel to the PCBA board 4, so that the steel sheet 2 located in the clamping groove 311 can be parallel to the PCBA board 4.

[0042] Considering that when the steel sheet 2 is about to enter the second positioning frame 111, the rough positioning effect of the clamping member 3 cannot ensure that the steel sheet 2 is accurately aligned with the second positioning frame 111 every time. Therefore, a guiding structure such as a chamfer structure, an inclined plane structure or an arc structure can be arranged along the inner edge of the top of the second positioning frame 111. When the steel sheet 2 is not aligned with the second positioning frame 111, the guiding structure can play a certain role in correcting the deviation of the steel sheet 2, so that the steel sheet 2 is gradually and accurately aligned with the second positioning frame 111. It should be noted that the guiding structure can be arranged on each frame structure of the second positioning frame 111 to ensure that the guiding structure can correct the deviation of each side of the steel sheet 2 and ensure the alignment accuracy between the steel sheet 2 and the second positioning frame 111.

[0043] Since the chuck 31 is arranged on the outer edge of the steel sheet 2, and the second positioning frame 111 needs to be in contact with the outer periphery of the steel sheet 2, the existence of the chuck 31 may affect the normal contact between the second positioning frame 111 and the steel sheet 2. In the present invention, an avoidance portion 13 can be arranged in the second positioning frame 111. The avoidance portion 13 corresponds to the chuck 31 in the first direction. When the steel sheet 2 is in contact with the second positioning frame 111, the chuck 31 can enter the avoidance portion 13, so as to prevent the second positioning frame 111 and the chuck 31 from interfering in the first direction and affecting the normal entry of the steel sheet 2 into the second positioning frame 111.

[0044] The avoidance portion 13 can be an avoidance groove opened on the second positioning frame 111. The avoidance groove is adapted to the shape of the chuck 31, or the size of the avoidance groove is slightly larger than that of the chuck 31, so that the chuck 31 can smoothly enter the avoidance groove.

[0045] In some embodiments, to improve the positioning effect and stability effect of the steel sheet 2, the steel sheet 2 can be a rectangular sheet. Multiple chucks 31 are respectively arranged at the four right angles of the steel sheet 2, and the clamping grooves 311 on the chucks 31 are right-angle grooves adapted to the right angles of the steel sheet 2. When the steel sheet 2 cooperates with the clamping groove 311, the four corners of the steel sheet 2 can respectively extend into the clamping grooves 311 of the chuck 31, so as to make the steel sheet 2 parallel to the PCBA board 4 as a whole by restricting the right-angle positions of the steel sheet 2. Correspondingly, the second positioning frame 111 is a rectangular frame adapted to the shape of the steel sheet 2, and the avoidance portion 13 includes a first avoidance groove 131 arranged at the right-angle corner of the second positioning frame 111.

[0046] After the four chucks 31 complete the rough positioning of the steel sheet 2, that is, after the four corners of the steel sheet 2 are inserted into the clamping grooves 311, the steel sheet 2 is parallel to the PCBA board 4, and the steel sheet 2 and the chucks 31 are relatively fixed in the first direction. However, in the direction parallel to the steel sheet 2, a preset space for the steel sheet 2 to translate along its plane direction should be reserved in the clamping grooves 311, so that the steel sheet 2 can move relative to the chucks 31 in the plane direction of the steel sheet 2, ensuring that when the steel sheet 2 is not precisely aligned with the second positioning frame 111, a certain moving space can be provided for the steel sheet 2, and then the steel sheet 2 can be moved to be precisely aligned with the second positioning hole.

[0047] It should be noted that the multiple chucks 31 of the present invention include but are not limited to being arranged at the right angles of the steel sheet 2, and can also be distributed on the four sides of the steel sheet 2, ensuring that the steel sheet 2 can be stably supported and the chucks 31 and the steel sheet 2 are relatively fixed in the first direction. There is no excessive limitation here, and all fall within the protection scope of the present invention.

[0048] In addition, to improve the fitting stability between the PCBA board 4 and the steel sheet 2, the fitting surfaces of the PCBA board 4 and the steel sheet 2 can be coplanar with the top surface of the jig board 1. At this time, a part of the steel sheet 2 can be attached to the PCBA board 4, and the other part exceeds the PCBA board 4, so it can be attached to the top surface of the jig board 1, so that the jig board 1 and the PCBA board 4 jointly attach and support the steel sheet 2 to ensure the fitting effect between the steel sheet 2 and the PCBA board 4.

[0049] On the basis of the above embodiments, since the fitting surfaces of the PCBA board 4 and the steel sheet 2 need to be coplanar with the top surface of the jig board 1, the first positioning portion can be a positioning groove 12 opened on the top surface of the jig board 1. The PCBA board 4 is located in the positioning groove 12, and the upper board surface of the PCBA board 4 can be flush with the top surface of the jig board 1; the positioning groove 12 can limit the outer periphery of the PCBA board 4 to prevent the PCBA board 4 from moving in the direction of its board surface. At the same time, vacuum suction accessories or the like can be provided in the positioning groove 12 to realize the positioning of the PCBA board 4 in the first direction.

[0050] It should be noted that to ensure that the bonding surface of the PCBA board 4 and the steel sheet 2 is coplanar with the top surface of the jig board 1, it is also necessary to ensure that the lower clamping wall of the clamping groove 311 is coplanar with the top surface of the jig board 1. At this time, the bottom surface of the steel sheet 2 can be attached to the top surface of the jig board 1. However, since there is a certain distance between the lower clamping wall of the clamping groove 311 and the bottom surface of the clamping groove 311, in order to make the lower clamping wall of the clamping groove 311 coplanar with the top surface of the jig board 1, a second avoidance groove 132 corresponding to the position of the first avoidance groove 131 needs to be provided on the jig board 1. The chuck 31 can sequentially enter the first avoidance groove 131 and the second avoidance groove 132 in the first direction. After the chuck 31 enters the second avoidance groove 132, the part between the lower clamping wall of the clamping groove 311 and the bottom surface of the clamping groove 311 corresponds to the second avoidance groove 132, so that the lower clamping wall of the clamping groove 311 is coplanar with the top surface of the jig board 1. Thus, the lower clamping wall of the clamping groove 311, the bonding surface of the PCBA board 4 and the steel sheet 2, and the top surface of the jig board 1 can be made coplanar.

[0051] In addition, the clamping member further includes connecting plates 32 provided on two opposite sides of the steel sheet 2. The connecting plates 32 can be located at both ends in the length direction of the steel sheet 2, or at both ends in the width direction of the steel sheet 2, and there is no excessive limitation here. The chucks 31 on two opposite sides of the steel sheet 2 are respectively fixedly connected to the corresponding connecting plates 32. Taking the connecting plates 32 being arranged at both ends in the length direction of the steel sheet 2 as an example, the two chucks 31 at one end in the length direction of the steel sheet 2 are fixedly connected to one connecting plate 32, and the two chucks 31 at the other end in the length direction of the steel sheet 2 are fixedly connected to the other connecting plate 32.

[0052] Considering that the presence of the connecting plates 32 may interfere with the second positioning frame 111 in the first direction and affect the positioning of the steel sheet 2 by the second positioning frame 111, an interval for accommodating the second positioning frame 111 can be provided between the connecting plates 32 and the side edges of the steel sheet 2. That is, the connecting plates 32 can adopt a C-shaped structure. The two end parts of the C-shaped structure are respectively connected to the two chucks 31, and there is an interval between the middle part of the C-shaped structure and the steel sheet 2. When the steel sheet 2 enters the second positioning frame 111, the frame structure of the second positioning frame 111 can enter the above-mentioned interval, so as to avoid interference between the clamping member 3 and the frame structure of the second positioning frame 111 in the first direction.

[0053] To install or remove the steel sheet 2 on the clamping member 3, the two connecting plates 32 can be arranged to move away from or close to each other in a direction parallel to the steel sheet 2, that is, the two connecting plates 32 are relatively movably arranged in a direction parallel to the steel sheet 2, so as to realize the mutual separation or approach of the two connecting plates 32. Further, a method of fixing one connecting plate 32 and movably arranging the other connecting plate 32 can be adopted; or a method of movably arranging both connecting plates 32 can also be adopted.

[0054] The clamping member 3 further includes second driving members 33 distributed on both sides of the jig plate 1 and corresponding to the two connecting plates 32 respectively. The second driving members 33 can be power cylinders such as electric cylinders, air cylinders, and hydraulic cylinders. The power end of the second driving member can move along the first direction. A support plate 34 is provided on the power end of the second driving member 33, and the connecting plate 32 is arranged on the support plate 34. Through the telescopic action of the second driving member 33, the clamping member 3 is driven to act, and the second driving members 33 on both sides need to act synchronously, so as to ensure that the steel sheet 2 can move along the first direction in a state parallel to the PCBA board 4.

[0055] For the method of fixing one connecting plate 32 and movably arranging the other connecting plate 32, one connecting plate 32 can be fixedly arranged on a support plate 34, and the other connecting plate 32 can be movably arranged on the support plate 34, and the moving direction is parallel to the direction of the steel sheet 2; for the method of movably arranging both connecting plates 32, both connecting plates 32 can be movably arranged on the support plate 34, and the moving direction is parallel to the direction of the steel sheet 2.

[0056] In addition, for the movably arranged connecting plate 32, a fixing block 35 can be provided on the support plate 34 movably connected to the connecting plate 32. A through guiding rod 36 is provided on the fixing block 35. The guiding rod 36 can be slidably arranged relative to the fixing block 35. Under the limiting action of the fixing block 35, the guiding rod 36 can move along its axial direction; wherein, the number of the fixing blocks 35 and the guiding rods 36 can be set to be multiple, the fixing blocks 35 and the guiding rods 36 are in one-to-one correspondence, and the axial direction of the guiding rod 36 is parallel to the steel sheet 2. The guiding rod 36 is fixedly connected to the connecting plate 32, and the connecting plate 32 is in contact with the support plate 34, so that the support plate 34 provides a stable sliding support effect for the connecting plate 32; a second spring 37 is sleeved on the outer periphery of the guiding rod 36. Both ends of the second spring 37 are respectively connected to the connecting plate 32 and the fixing block 35, and the second spring 37 has an initial compression amount. The second spring 37 provides an elastic force for the sliding connecting plate 32 to move towards the other connecting plate 32, so that the chucks 31 on the two connecting plates 32 can tightly press the steel sheet 2 under the action of the elastic force.

[0057] In addition, since there is a gap between the connecting plate 32 and the steel sheet 2, a finger can move the movable connecting plate 32 at this gap to drive the chuck 31 away from the steel sheet 2, and then the steel sheet 2 can be removed from the clamping member 3. When clamping the steel sheet 2, first slide the movable clamping member 3 in a direction away from the fixed clamping member 3, then insert the two corners at one end of the steel sheet 2 into the clamping groove 311 of the fixed clamping member 3, and then slide the sliding clamping member 3 in a direction close to the fixed clamping member 3 to stably clamp the steel sheet 2. When the operating end of the second driving member 33 extends, the support plate 34 rises, and the clamping member 3 clamps the steel sheet 2 and rises, so as to separate from the PCBA board 4 in the first direction; when the operating end of the second driving member 33 retracts, the support plate 34 descends, so that the steel sheet 2 moves toward the PCBA board 4 in the first direction until it closely adheres to the PCBA board 4.

[0058] As mentioned above, the first positioning portion can be the positioning groove 12 formed on the jig plate 1. After the PCBA board 4 is placed in the positioning groove 12 and positioned, the bonding surface of the PCBA board 4 and the steel sheet 2 can be flush with the top surface of the jig plate 1, or not flush with the top surface of the jig plate 1. As long as it is ensured that the bonding surface of the PCBA board 4 and the steel sheet 2 is not lower than the top surface of the jig plate 1, it falls within the protection scope of the present invention.

[0059] Among them, the positioning effect of the positioning groove 12 on the PCBA board 4 is that the PCBA board 4 is fixedly arranged relative to the positioning groove 12 in any direction in its plane. Among them, this any direction includes the direction of translation and the direction of rotation, etc. For example, this effect is achieved by the way that the positioning groove 12 abuts against the outer periphery of the PCBA board 4. In the first direction, the PCBA board 4 is movably arranged relative to the positioning groove 12 to facilitate the taking and placing of the PCBA board 4 in the positioning groove 12.

[0060] Furthermore, to prevent the PCBA board 4 from directly sliding into contact with the inner wall of the positioning groove 12, which may cause damage to the PCBA board 4, the first positioning portion of the present invention further includes a positioning plate 7 placed in the positioning groove 12. The outer periphery of the positioning plate 7 abuts against the inner wall of the positioning groove 12, and the PCBA board 4 is fixedly arranged on the positioning plate 7. The positioning plate 7 can be movably arranged relative to the positioning groove 12 in the first direction. It can be seen that the positioning groove 12 can position the positioning plate 7, which can ensure the positioning effect of the PCBA board 4 on the positioning plate 7, and the setting of the positioning plate 7 can prevent the PCBA board 4 from directly sliding into contact with the inner wall of the positioning groove 12, thus ensuring the safety of the PCBA board 4.

[0061] In order to fix the PCBA board 4 on the positioning board 7, a first positioning frame 71 extending in the first direction can be provided on the top surface of the positioning board 7. The first positioning frame 71 encloses to form a receiving space with a notch 73 on one side for receiving the PCBA board 4. The PCBA board 4 can enter and exit the first positioning frame 71 through the notch 73. After the PCBA board 4 enters the first positioning frame 71, the outer periphery of the PCBA board 4 can be in contact with the first positioning frame 71, so as to realize the limit of the PCBA board 4. Specifically, the notch 73 on the first positioning frame 71 can be located on one side in the width direction of the first positioning frame 71. Fillets that fit the arc surface of the PCBA board 4 can be provided on both sides in the length direction and the other side in the width direction of the first positioning frame 71. As for the outer contours of other shapes of the PCBA board 4, they will not be elaborated one by one here. It is only necessary to ensure that the inner wall of the first positioning frame 71 can correspond to and fit the outer contour of the PCBA board 4.

[0062] A liftable baffle 72 is provided on the side of the positioning board 7 with the notch 73. Specifically, the baffle 72 is movably arranged along the first direction, and there are at least two positions for the baffle 72. The baffle 72 in the first position is higher than the top surface of the positioning board 7, so that the baffle 72 is in contact with the side of the PCBA board 4, and cooperates with the first positioning frame 71 to position and limit the PCBA board 4 in the circumferential direction of the PCBA board 4; the baffle 72 in the second position can be lower than the top surface of the positioning board 7, so that the baffle 72 is disengaged from the side of the PCBA board 4, and further the first positioning frame 71 releases the positioning and limit of the PCBA board 4.

[0063] Furthermore, the baffle 72 includes a positioning section 721 extending in the first direction and a connecting section 722 perpendicular to the positioning section 721, that is, the baffle 72 is integrally L-shaped; a through hole corresponding to the positioning section 721 is provided on the positioning board 7, and the positioning section 721 can move in the through hole, and the positioning section 721 can be in contact with or disengaged from the side of the PCBA board 4.

[0064] The connecting section 722 is located below the positioning board 7. The connecting section 722 interferes with the through hole on the positioning board 7 in the first direction, so that the positioning section 721 has an upper limit of movement in the first direction, preventing the positioning section 721 from exceeding the upper board surface of the PCBA board 4; in addition, the connecting section 722 and the positioning board 7 can also be connected by a first spring 76, and the first spring 76 is used to provide an elastic force for the baffle 72 to move towards the first position.

[0065] Specifically, both ends of the first spring 76 can be respectively connected to the bottom surface of the positioning plate 7 and the top surface of the connecting section 722. The first spring 76 has an initial stretching amount, thereby providing an elastic force for the baffle 72 to move towards the first position; alternatively, it is fixed to the bottom surface of the positioning plate 7 through the mounting plate 75. The mounting plate 75 is L-shaped. The top surface of the vertical section of the mounting plate 75 is fixed to the bottom surface of the positioning plate 7. One end of the first spring 76 is fixed to the top surface of the horizontal section of the mounting plate 75, and the other end of the first spring 76 is fixed to the bottom surface of the connecting section 722 of the baffle 72. The first spring 76 has an initial compression amount, and the first spring 76 exerts a force on the baffle 72 to move the baffle 72 upward. When there is no external force, the first positioning frame 71 and the baffle 72 limit the PCBA board 4 to prevent the PCBA board 4 from displacing. In addition, since the horizontal section of the mounting plate 75 corresponds to the connecting section 722 of the baffle 72, it can also make the positioning section 721 have a lower limit of movement in the first direction, preventing the positioning section 721 of the baffle 72 from disengaging from the through hole on the positioning plate 7.

[0066] The printing device of the present invention further includes a bottom plate 5. The jig plate 1 is fixedly connected to the bottom plate 5 through a support rod. The support rod raises the jig plate 1 so that there is a certain distance between the jig plate 1 and the bottom plate 5; the positioning plate 7 is arranged on the bottom plate 5 through a first driving member 74. The first driving member 74 can be a power cylinder such as an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder. The first driving members 74 are distributed on both sides of the positioning plate 7 and are located below the jig plate 1. The power end of the first driving member 74 moves along the first direction. The power end of the first driving member 74 is connected to the positioning plate 7. When the action end of the first driving member 74 extends, the positioning plate 7 rises, and when the action end of the first driving member 74 retracts, the positioning plate 7 descends. And the positioning plate 7 is movably arranged between the jig plate 1 and the bottom plate 5, so that the positioning plate 7 can enter and exit the positioning groove 12. In addition, the second driving member 33 is also arranged on the bottom plate 5.

[0067] A plurality of first vertical plates 81 are arranged on the bottom plate 5. Two first vertical plates 81 form a group. A first rotating shaft 82 is arranged between the two first vertical plates 81 in a group. The first rotating shaft 82 is rotatably arranged relative to the first vertical plates 81, and a coaxial first driving wheel 83 and a second driving wheel 84 are fixedly arranged on the first rotating shaft 82; a first driving plate 723 located below the positioning plate 7 is arranged on the baffle 72, and a second driving plate 77 is arranged on the bottom surface of the positioning plate 7. Both the first driving plate 723 and the second driving plate 77 extend along the first direction. Among them, the second driving plate 77 is in transmission connection with the second driving wheel 84, the first driving plate 723 is in transmission connection with the first driving wheel 83, the movement directions of the first driving plate 723 and the second driving plate 77 are the same, and the speed of the first driving plate 723 is greater than the speed of the second driving plate 77.

[0068] When the positioning plate 7 descends, the second driving plate 77 descends synchronously with the positioning plate 7. The second driving plate 77 drives the second driving wheel 84 to rotate. The second driving wheel 84 drives the first driving wheel 83 to rotate synchronously under the action of the first rotating shaft 82. The first driving wheel 83 can drive the first driving plate 723 to descend. However, since the descending speed of the first driving plate 723 is greater than that of the second driving plate 77, the descending speed of the baffle plate 72 will be faster. Therefore, the baffle plate 72 will generate a downward displacement relative to the positioning plate 7. As the positioning plate 7 continues to descend, at a certain position of the positioning plate 7, the baffle plate 72 overcomes the elastic force of the first spring 76 and reaches the first position, that is, the baffle plate 72 is lower than the top surface of the positioning plate 7. At this time, the PCBA board 4 can slide out from the notch 73.

[0069] Conversely, when the positioning plate 7 ascends, the corresponding second driving wheel 84 will rotate in the reverse direction, so that the first driving wheel 83 drives the first driving plate 723 to move upward in the reverse direction. The baffle plate 72 will generate an upward displacement relative to the positioning plate 7, so that at a certain position, the baffle plate 72 reaches the second position, that is, the baffle plate 72 is higher than the top surface of the positioning plate 7. At this time, the PCBA board 4 will be positioned and limited in the first positioning frame 71.

[0070] Further, the first driving wheel 83 and the second driving wheel 84 can be rubber wheels. Silicone surfaces are provided on the surface of the first driving plate 723 in contact with the first driving wheel 83 and the surface of the second driving wheel 84 in contact with the second driving plate 77. The transmission connection between the first driving plate 723 and the first driving wheel 83, and between the second driving plate 77 and the second driving wheel 84 is realized through friction. In addition, the first driving plate 723 and the first driving wheel 83 can also adopt the way of gear and rack to realize the transmission connection, that is, the first driving wheel 83 is a gear and the first driving plate 723 is a rack, and the transmission connection is realized through the meshing of the gear and the rack. Similarly, the second driving plate 77 and the second driving wheel 84 can also adopt the way of gear and rack to realize the transmission connection, which will not be elaborated here.

[0071] To make the speed of the first driving plate 723 higher than that of the second driving plate 77, the outer diameter of the first driving wheel 83 can be made larger than that of the second driving wheel 84. At the same rotation speed of the first driving wheel 83 and the second driving wheel 84, the linear speed at the tangent point of the first driving wheel 83 and the first driving plate 723 is greater than the linear speed at the tangent point of the second driving wheel 84 and the second driving plate 77, so that the speed of the first driving plate 723 is higher than that of the second driving plate 77, and further, the baffle plate 72 and the positioning plate 7 generate a relative displacement in the first direction. It should be noted that within the moving range of the positioning plate 7, the baffle plate 72 can move to the first position and the second position. In other words, during the process of the positioning plate 7 ascending or descending to realize the linkage of the baffle plate 72, the baffle plate 72 can reach the first position during the ascending process of the positioning plate 7, and the baffle plate 72 can reach the second position during the descending process of the positioning plate 7.

[0072] To ensure the linkage effect between the positioning plate 7 and the baffle 72, two sets of first vertical plates 81 can be arranged on the bottom plate 5. The two sets of first vertical plates 81 are respectively located on both sides of the baffle 72 in the length direction. Correspondingly, the number of the first drive plates 723 and the second drive plates 77 is also two. The two first drive plates 723 are arranged on both sides of the baffle 72 in the length direction, and the two second drive plates 77 are also arranged on both sides of the baffle 72 in the length direction. In this way, both sides of the baffle 72 can be subjected to the linkage effect synchronized with the positioning plate 7, realizing the stable rising or falling of the baffle 72.

[0073] Several second vertical plates 91 are also arranged on the bottom plate 5. Two second vertical plates 91 form a group. The first vertical plate 81 is located on the side of the positioning plate 7 with the notch 73, while the second vertical plate 91 is located on the side of the positioning plate 7 opposite to the notch 73. A parallel second rotating shaft 92 and a third rotating shaft 93 are arranged between the two second vertical plates 91 in a group. Both the second rotating shaft 92 and the third rotating shaft 93 are rotatably connected to the second vertical plate 91. A coaxial fourth drive wheel 94 and a fifth drive wheel 95 are fixedly arranged on the second rotating shaft 92. A sixth drive wheel 96 is arranged on the third rotating shaft 93. One side of the sixth drive wheel 96 is in transmission connection with the fifth drive wheel 95, and the other side is in transmission connection with the third drive plate 97. A push rod 98 is arranged on the third drive plate 97. The push rod 98 penetrates through the first positioning frame 71 to push the PCBA board 4 towards the notch 73.

[0074] Specifically, a third drive wheel 85 is also arranged on the first rotating shaft 82. The third drive wheel 85 is in transmission connection with the fourth drive wheel 94 through a synchronous belt 86. When the positioning plate 7 descends, the third drive wheel 85 can drive the fourth drive wheel 94 to rotate through the synchronous belt 86. The fourth drive wheel 94 drives the fifth drive wheel 95 to rotate under the action of the second rotating shaft 92, and the fifth drive wheel 95 can drive the sixth drive wheel 96 to rotate, and the sixth drive wheel 96 can drive the third drive plate 97 to rotate, thereby realizing the movement of the push rod 98.

[0075] Among them, the transmission connections between the third drive wheel 85 and the synchronous belt 86, and between the fourth drive wheel 94 and the synchronous belt 86 can both adopt the transmission form of a gear chain. The fifth drive wheel 95 and the sixth drive wheel 96 can adopt the transmission connection of rubber wheel friction or gear meshing. The sixth drive wheel 96 and the third drive plate 97 can adopt the transmission connection of a gear rack or a rubber wheel and a silica gel surface. Specifically, the transmission connection form of the first drive wheel 83 and the first drive plate 723 can be referred to, and details are not described here. It should be noted that the above-mentioned transmission connection methods include but are not limited to the methods given above, and details are not described one by one here, and all fall within the protection scope of the present invention.

[0076] A through hole for the push rod 98 to penetrate is formed on the side wall of the first positioning frame 71. The through hole is a vertical waist-shaped hole. One end of the push rod 98 close to the through hole is arc-shaped. The push rod 98 penetrates the through hole and pushes the PCBA board 4. Specifically, when the positioning plate 7 descends, the baffle 72 switches from the first position to the second position. The push rod 98 moves towards the notch 73. When the baffle 72 reaches the second position, the push rod 98 contacts the side of the PCBA board 4. As the positioning plate 7 continues to descend, the push rod 98 pushes the PCBA board 4 out of the first positioning frame 71, thus realizing the linkage between the push rod 98 and the positioning plate 7.

[0077] Conversely, when the positioning plate 7 ascends, the baffle 72 switches from the second position to the first position. The push rod 98 moves in a direction away from the notch 73. When the baffle 72 is about to reach the first position, the end of the push rod 98 can move from the inside of the first positioning frame 71 to be flush with the inner wall of the first positioning frame 71 or enter the inner wall of the first positioning frame 71. At this time, the baffle 72 does not exceed the top surface of the positioning plate 7. The PCBA board 4 can enter the first positioning frame 71 through the notch 73. After the PCBA board 4 completely enters the first positioning frame 71, as the positioning plate 7 continues to ascend, the baffle 72 will reach the first position, that is, the positioning section 721 of the baffle 72 abuts against the side wall of the PCBA board 4, thus realizing the linkage positioning of the PCBA board 4.

[0078] To ensure that the push rod 98 can smoothly push the PCBA board 4 out of the first positioning frame 71, two groups of second vertical plates 91 can be arranged on the bottom plate 5. The two groups of second vertical plates 91 correspond to the two groups of first vertical plates 81 respectively. The fourth driving wheels 94 on each group of second vertical plates 91 correspond to the third driving wheels 85 on each group of first vertical plates 81. Under the action of the synchronous belt 86, the synchronous rotation of the fourth driving wheels 94 is realized, thereby realizing the synchronous rotation of the sixth driving wheels 96, and further enabling the two push rods 98 to move synchronously. The two push rods 98 can act on the PCBA board 4 synchronously, so that the side of the PCBA board 4 close to the push rods 98 is synchronously stressed and is smoothly pushed out of the first positioning frame 71.

[0079] In addition, since the push rod 98 needs to move a relatively long path to completely push the PCBA board 4 out of the first positioning frame 71, the fifth driving wheel 95 can adopt a small-diameter wheel, and the sixth driving wheel 96 can adopt a large-diameter wheel. Thus, the push rod 98 has a larger stroke to meet the requirement of pushing the PCBA board 4 out of the first positioning frame 71.

[0080] As mentioned above, there are two third drive plates 97 . A T-shaped plate 102 fixed to the base plate 5 is provided between the two third drive plates 97 . A fixed plate 101 fixed to the base plate 5 is provided on the opposite side of the two third drive plates 97 . The fixed plate 101 and the T-shaped plate 102 are provided with guide grooves 103 . The third drive plate 97 is provided with a guide block that cooperates with the guide grooves 103 . The guide direction of the guide grooves 103 is set along the axial direction of the push rod 98 , thereby providing the push rod 98 with a stable pushing effect. Of course, the guiding effect of the push rod 98 can also be achieved by using a guide rail slider, that is, a slide rail is provided on the T-shaped plate 102 and the fixed plate 101 , and the third drive plate 97 is a guide block that cooperates with the slide rail, or a guide block that cooperates with the slide rail is provided on the third drive plate 97 , thereby supporting and guiding the third drive plate 97 .

[0081] The printing device also includes a collecting plate 6 arranged on the bottom plate 5 and located on the side of the positioning plate 7 having a notch 73. The collecting plate 6 includes an inclined portion 61 and a horizontal portion 62. The inclined portion 61 is inclined downward from close to the positioning plate 7 to away from the positioning plate 7. The horizontal portion 62 is connected to the lowest side of the inclined portion 61. The highest side position of the inclined portion 61 is lower than the lowest position after the positioning plate 7 is lowered.

[0082] During the descending process of the baffle 72, the push rod 98 extends into the first positioning frame 71. When the top surface of the positioning section 721 of the baffle 72 is flush with the top surface of the positioning plate 7, the push rod 98 contacts the PCBA board 4. When the positioning section 721 of the baffle 72 continues to descend, the push rod 98 pushes the PCBA board 4 toward the collecting plate 6. Under the guidance of the inclined portion 61, the PCBA board 4 slides down along the inclined portion 61 to the horizontal portion 62, thereby realizing automatic stripping and unloading of the PCBA board 4.

[0083] When solder paste printing is performed, the PCBA board 4 is first placed in the first positioning frame 71, the actuating end of the first driving member 74 extends, the positioning plate 7 rises, and the baffle 72 rises in conjunction to achieve positioning of the PCBA board 4. When the PCBA board 4 enters the positioning groove 12 and the PCBA board 4 is flush with the top surface of the jig plate 1, the first driving member 74 stops moving.

[0084] Then, the steel sheet 2 is clamped by the clamping member 3, and the actuating end of the second driving member 33 is retracted, so that the steel sheet 2 and the PCBA board 4 are in close contact. Under the limit of the second positioning frame 111, the holes on the steel sheet 2 and the positions of the PCBA board 4 where the solder paste is to be printed are automatically and quickly aligned.

[0085] Then, solder paste is brushed on the steel sheet 2. After printing is completed, the actuating end of the second driving member 33 extends to separate the steel sheet 2 and the PCBA board 4 along the first direction. Then, the actuating end of the first driving member 74 retracts to lower the positioning plate 7 with the PCBA board 4.

[0086] When the positioning plate 7 descends, the baffle 72 is linked to descend until the top surface of the positioning section 721 of the baffle 72 is lower than the top surface of the positioning plate 7.

[0087] During the descent of the baffle 72, the push rod 98 extends into the first positioning frame 71. When the top surface of the positioning section 721 of the baffle 72 is flush with the top surface of the positioning plate 7, the push rod 98 contacts the PCBA board 4. When the vertical section of the baffle 72 continues to descend, the push rod 98 pushes the PCBA board 4 towards the aggregate plate 6. Under the guiding action of the inclined portion 61, the PCBA board 4 slides down along the inclined portion 61 to the horizontal portion 62, thereby realizing the automatic unloading and discharging of the PCBA board 4, facilitating the staff to take the printed PCBA board 4.

[0088] The above has introduced in detail a PCBA board solder paste printing device provided by an embodiment of the present invention. The embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method part.

[0089] In this article, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A solder paste printing device for a PCBA board, characterized in that, Comprising: A jig plate (1), on which a first positioning portion for positioning a PCBA board (4) is provided, and a second positioning portion (11) located on the outer periphery of the PCBA board (4) is provided, and the second positioning portion (11) extends along a first direction perpendicular to the PCBA board (4); A clamping member (3), the clamping member (3) is movably arranged along the first direction, the clamping member (3) clamps the outer edge of the steel sheet (2) and keeps the steel sheet (2) parallel to the PCBA board (4), the steel sheet (2) and the clamping member (3) are relatively fixed in the first direction, the outer periphery of the steel sheet (2) abuts against the second positioning portion (11), and is movably arranged relative to the second positioning portion (11) in the first direction, and the steel sheet (2) fits the PCBA board (4) at a preset position.

2. The PCBA board solder paste printing device according to claim 1, characterized in that, The second positioning portion (11) includes a second positioning frame (111) provided on the top surface of the jig plate (1), and the second positioning frame (111) encloses to form an accommodating space for accommodating the steel sheet (2), and the steel sheet (2) is fixedly arranged relative to the second positioning frame (111) in any direction in its plane, and the second positioning frame (111) extends beyond the fitting surface of the PCBA board (4) and the steel sheet (2) in the first direction.

3. The PCBA board solder paste printing device according to claim 2, characterized in that, The clamping member (3) includes a plurality of chucks (31) distributed on the outer periphery of the steel sheet (2), and a clamping groove (311) for clamping the steel sheet (2) is provided on one side of the chuck (31) facing the steel sheet (2), the clamping groove (311) is limited and clamped with the steel sheet (2) in the first direction, and the clamping grooves (311) of the plurality of chucks (31) are in the same plane parallel to the PCBA board (4).

4. The solder paste printing device for the PCBA board according to claim 3, characterized in that, The second positioning frame (111) is provided with an avoidance portion (13), and the avoidance portion (13) corresponds to the chuck (31) in the first direction.

5. The solder paste printing equipment for the PCBA board according to claim 4, wherein, The steel sheet (2) is a rectangular sheet, and the plurality of chucks (31) are respectively provided at the four right angles of the steel sheet (2), and the clamping groove (311) is a right-angle groove adapted to the right angle; The second positioning frame (111) is a rectangular frame adapted to the steel sheet (2), and the avoidance portion (13) includes a first avoidance groove (131) provided at the corner of the second positioning frame (111).

6. The solder paste printing device for the PCBA board according to claim 5, characterized in that, The fitting surface of the PCBA board (4) and the steel sheet (2) is coplanar with the top surface of the jig plate (1), and the steel sheet (2) fits on the top surface of the jig plate (1); The avoidance portion (13) further includes a second avoidance groove (132) provided on the jig plate (1) and corresponding to the first avoidance groove (131), and the chuck (31) located in the second avoidance groove (132) is used to make the lower clamping wall of the clamping groove (311), the fitting surface of the PCBA board (4) and the steel sheet (2), and the top surface of the jig plate (1) coplanar; The clamping member (3) includes connecting plates (32) provided on two opposite sides of the steel sheet (2), the chucks (31) on the two opposite sides are respectively fixedly connected to the corresponding connecting plates (32), and a gap for accommodating the second positioning frame (111) is provided between the connecting plates (32) and the side edges of the steel sheet (2); The two connecting plates (32) move away from or close to each other in a direction parallel to the steel sheet (2); The clamping member (3) further includes second driving members (33) distributed on both sides of the jig plate (1) and corresponding to the two connecting plates (32) respectively. The power ends of the second driving members (33) move along the first direction. A support plate (34) is provided at the power end of the second driving member (33). One connecting plate (32) is fixedly provided on one support plate (34), and the other connecting plate (32) is movably provided on the other support plate (34), and the moving direction is parallel to the direction of the steel sheet (2); A fixing block (35) is provided on the support plate (34) movably connected to the connecting plate (32). A guide rod (36) is slidably provided on the fixing block (35). The guide rod (36) is fixedly connected to the connecting plate (32). A second spring (37) is sleeved on the outer periphery of the guide rod (36). The two ends of the second spring (37) are respectively connected to the connecting plate (32) and the fixing block (35). The second spring (37) has an initial compression amount, which is used to provide an elastic force for the connecting plate (32) to move towards the other connecting plate (32), and under the action of the elastic force, the chucks (31) on the two connecting plates (32) are pressed against the steel sheet (2).

7. The PCBA board solder paste printing equipment according to any one of claims 2-6, characterized in that, The first positioning portion includes a positioning groove (12) opened on the jig plate (1). The PCBA board (4) is placed in the positioning groove (12). The PCBA board (4) is fixedly arranged relative to the positioning groove (12) in any direction in its plane, and the PCBA board (4) is movably arranged relative to the positioning groove (12) in the first direction. The joint surface of the PCBA board (4) and the steel sheet (2) is not lower than the top surface of the jig plate (1).

8. The solder paste printing device for the PCBA board according to claim 7, wherein, The first positioning portion includes a positioning plate (7) placed in the positioning groove (12). The outer periphery of the positioning plate (7) abuts against the inner wall of the positioning groove (12). The positioning plate (7) is movably arranged relative to the positioning groove (12) in the first direction; A first positioning frame (71) extending along the first direction is provided on the top surface of the positioning plate (7). The first positioning frame (71) encloses an accommodating space with a notch (73) on one side for accommodating the PCBA board (4). The PCBA board (4) enters and exits the first positioning frame (71) from the notch (73), and the outer periphery of the PCBA board (4) abuts against the first positioning frame (71); On one side of the positioning plate (7) having the notch (73), there is a baffle (72). The baffle (72) is movably arranged along the first direction. The baffle (72) has at least two positions. In the first position, the baffle (72) is higher than the top surface of the positioning plate (7), and the baffle (72) abuts against the side of the PCBA board (4) to cooperate with the second positioning frame (111) to position the PCBA board (4); in the second position, the baffle (72) is lower than the top surface of the positioning plate (7), and the baffle (72) is disengaged from abutting against the side of the PCBA board (4), so that the PCBA board (4) can be detached from the positioning plate (7).

9. The PCBA board solder paste printing device according to claim 8, wherein, The baffle (72) includes a positioning section (721) extending along the first direction and a connecting section (722) perpendicular to the positioning section (721); The positioning plate (7) is provided with a through hole corresponding to the positioning section (721), and the positioning section (721) is used to abut against or disengage from abutting against the side of the PCBA board (4); The connecting section (722) is located below the positioning plate (7), and the connecting section (722) is connected to the positioning plate (7) by a first spring (76). The first spring (76) is used to provide an elastic force for the baffle (72) to move towards the first position.

10. The PCBA board solder paste printing device according to claim 8, wherein, It further includes a bottom plate (5). The jig plate (1) and the positioning plate (7) are arranged on the bottom plate (5). There is a preset distance between the jig plate (1) and the bottom plate (5), and the positioning plate (7) is movably arranged between the jig plate (1) and the bottom plate (5); A plurality of first vertical plates (81) are provided on the bottom plate (5). A first rotating shaft (82) is provided between the two first vertical plates (81). A coaxial first driving wheel (83) and a second driving wheel (84) are fixedly arranged on the first rotating shaft (82); The baffle (72) is provided with a first driving plate (723) located below the positioning plate (7). The bottom surface of the positioning plate (7) is provided with a second driving plate (77). Both the first driving plate (723) and the second driving plate (77) extend along the first direction; The second driving plate (77) is in transmission connection with the second driving wheel (84), the first driving plate (723) is in transmission connection with the first driving wheel (83). The moving directions of the first driving plate (723) and the second driving plate (77) are the same, and the speed of the first driving plate (723) is greater than the speed of the second driving plate (77).

11. The PCBA board solder paste printing device according to claim 10, wherein, The first driving wheel (83) and the second driving wheel (84) are rubber wheels. Silicone surfaces are provided on the surface of the first driving plate (723) in contact with the first driving wheel (83) and the surface of the second driving wheel (84) in contact with the second driving plate (77) to achieve transmission connection by using friction; The outer diameter of the first driving wheel (83) is greater than the outer diameter of the second driving wheel (84), so that the linear velocity at the tangent point of the first driving wheel (83) and the first driving plate (723) is greater than the linear velocity at the tangent point of the second driving wheel (84) and the second driving plate (77). The baffle (72) and the positioning plate (7) undergo relative displacement in the first direction, and within the movable range of the positioning plate (7), the baffle (72) can move to the first position and the second position.

12. The solder paste printing equipment for the PCBA board according to claim 10, characterized in that, It further includes a first driving member (74) provided on the bottom plate (5). The first driving members (74) are distributed on both sides of the positioning plate (7) and are located below the jig plate (1). The power end of the first driving member (74) moves along the first direction, and the power end of the first driving member (74) is connected to the positioning plate (7).

13. The solder paste printing device for the PCBA board according to claim 10, wherein A plurality of second vertical plates (91) are provided on the bottom plate (5). The first vertical plate (81) is located on the side of the positioning plate (7) having the notch (73), and the second vertical plates (91) are located on the side of the positioning plate (7) opposite to the notch (73). A second rotating shaft (92) and a third rotating shaft (93) are provided between the two second vertical plates (91). A coaxial fourth driving wheel (94) and a fifth driving wheel (95) are fixedly provided on the second rotating shaft (92). A sixth driving wheel (96) is provided on the third rotating shaft (93). One side of the sixth driving wheel (96) is in transmission connection with the fifth driving wheel (95), and the other side is in transmission connection with a third driving plate (97). A push rod (98) is provided on the third driving plate (97). The push rod (98) penetrates through the first positioning frame (71) to push the PCBA board (4) towards the notch (73). A third driving wheel (85) is further provided on the first rotating shaft (82). The third driving wheel (85) is in transmission connection with the fourth driving wheel (94) through a synchronous belt (86).

14. The solder paste printing device for the PCBA board according to claim 13, characterized in that, When the positioning plate (7) descends, the baffle (72) switches from the first position to the second position. The push rod (98) moves towards the notch (73). When the baffle (72) is in the second position, the push rod (98) contacts the side of the PCBA board (4). As the positioning plate (7) continues to descend, the push rod (98) pushes the PCBA board (4) out of the first positioning frame (71).

15. The PCBA board solder paste printing device according to claim 13, characterized in that, The number of the third driving plates (97) is two. A T-shaped plate (102) fixed on the bottom plate (5) is provided between the two third driving plates (97). Fixing plates (101) fixed on the bottom plate (5) are provided on the opposite sides of the two third driving plates (97). A guiding groove (103) is provided on the fixing plate (101) and the T-shaped plate (102). A guiding block cooperating with the guiding groove (103) is provided on the third driving plate (97). The guiding direction of the guiding groove (103) is arranged along the axial direction of the push rod (98).

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