Circuit board silk-screen resistance welding turnover device and silk-screen resistance welding method

Abstract

The invention relates to the technical field of printed circuit board manufacturing, in particular to a circuit board screen printing resistance welding turnover device and a screen printing resistance welding method, and the device comprises a bottom plate which serves as a bearing carrier of the whole device; the support is fixedly connected to the bottom plate, and the support is a frame supported by four supporting columns; the guide plates are symmetrically and fixedly connected to the left and right sides of the top of the bracket; and the mounting plate is fixedly arranged on the rear side of the top of the bracket. A circuit board is clamped in a rolling mode through a plurality of clamping rolling wheels on the front side and the rear side, then a one-way gear is meshed with a rack, a servo motor can automatically turn over when driving the circuit board to ascend and descend through a third screw, and meanwhile an electric sliding rail is arranged to drive a containing plate to ascend and descend. The auxiliary frame plate on the placement plate can assist in supporting the turned circuit board, and the auxiliary frame plate is reset downwards after supporting the circuit board to the highest point, so that the effect of coherent matching of the auxiliary frame plate and the circuit board is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of printed circuit board manufacturing, and in particular to a circuit board silk screen solder resist flipping device and a silk screen solder resist method. Background Art

[0002] Apply a layer of green or black insulating paint on the surface of the PCB, and then use silk screen printing to print out some areas that do not need to be covered with insulating paint at the parts that need to be welded. This technology is called silk screen solder mask. The corresponding to silk screen solder mask is the "exposed pad", that is, the pad not covered with insulating paint. Silk screen solder mask can reduce the risk of circuit short circuit between pads, and also prevent the circuit board from being corroded by impurities in the environment.

[0003] After searching, the patent with the authorization publication number CN110602894B discloses a method for improving the efficiency of silk screen solder mask on circuit boards, silk screen solder mask ink is printed on a PCB production board, and the PCB production board is divided into the following areas: a board edge area, a unit board area, and a molding line area isolating each unit board area; positioning holes are respectively provided on the board edge areas at the four corners of the PCB production board; the silk screen solder mask method comprises the following steps: silk screen solder mask ink is printed on the first surface of the PCB production board; the PCB production board is placed on a silk screen auxiliary board with the first surface facing downward and facing the silk screen auxiliary board, and the solder mask ink is printed on the second surface of the PCB production board; the silk screen auxiliary board is divided into areas corresponding to the board edge area, the unit board area and the molding line area of ​​the PCB production board, and a support block is provided on the board edge area at a triangle of the silk screen auxiliary board and at a position corresponding to the positioning hole; the PCB production board is left stationary until the solder mask ink on the first surface and the second surface is dry and does not flow, and then the PCB production board is pre-baked, aligned exposed and developed in sequence to complete the production of the solder mask layer on the PCB production board.

[0004] The above patent designs a method for silk-screening solder mask on a circuit board. By adopting a silk-screen auxiliary plate with an adjustable support block, silk-screen printing can be performed on the second surface immediately after silk-screening solder mask ink on the first surface. However, before printing the solder mask layer, the auxiliary plate needs to be precisely aligned with the circuit board. This process is usually done manually, which can easily affect the printing accuracy and consistency. In addition, the auxiliary plate needs to be carefully removed after printing, which makes the entire production process lack continuity and leads to low production efficiency. Summary of the invention

[0005] In order to overcome the disadvantages of manually operating the corresponding auxiliary board and circuit board to cooperate and separate with each other during silk screen solder mask printing on the existing double-sided circuit board, which makes the whole process operation cumbersome and incoherent, a circuit board silk screen solder mask flipping device and a silk screen solder mask method are provided.

[0006] Technical solution: A circuit board silk screen solder mask flipping device and a silk screen solder mask method, comprising: a base plate, serving as a load-bearing carrier of the entire device; a bracket, fixedly connected to the base plate, the bracket being a frame supported by four pillars; a guide plate, symmetrically fixed to the left and right sides of the top of the bracket; a mounting plate, fixedly arranged on the rear side of the top of the bracket; a sliding frame, slidably installed on the front side of the mounting plate, the sliding frame being perpendicular to the mounting plate; an inkjet machine, installed on the sliding frame, the body of the inkjet machine being perpendicular to the sliding frame; a drag chain slide module, arranged on the front side of the mounting plate, the sliding frame being connected to the drag chain slide module, the drag chain slide module driving the entire inkjet machine to move left and right through the sliding frame; a clamping assembly, the clamping assembly being used to clamp the circuit board; the clamping assembly includes a guide frame , a clamping member, a mounting frame, a sliding block, a clamping frame, a clamping roller and a motor pulley group, the guide frame is symmetrically fixed to the front and rear sides of the base plate, the guide frame is perpendicular to the base plate, and a sliding opening is opened on the upper part of the guide frame, the clamping member is symmetrically slidably installed on the corresponding guide frame through the sliding block, the mounting frame is symmetrically installed on the corresponding end of the clamping member, the clamping frame is symmetrically installed inside the corresponding mounting frame, a plurality of clamping rollers are provided and rotatably installed inside each of the clamping frames, the motor pulley group is provided on each of the clamping frames, and the motor pulley group drives each of the clamping rollers in the clamping frames of the same group to rotate; an adjustment component is symmetrically arranged on each of the guide plates, and the adjustment component adjusts the clamping distance between the clamping frames through the mounting frame.

[0007] In one embodiment, the adjustment assembly includes a cylinder, a telescopic rod and a spring. The front mounting frame is slidably connected to the guide plate. The cylinder is symmetrically installed on the lower side of each guide plate. The cylinder is connected to the mounting frame through the telescopic rod. A spring is provided between the mounting frame and the clamping frame.

[0008] In one of the embodiments, a support assembly is provided on the base plate, and the support assembly includes an electric slide rail, a placement plate, a positioning plate, an auxiliary frame plate and a limit assembly. The electric slide rail is provided on the inner walls of the four pillars of the bracket, and the placement plate is slidably installed on the bracket through the electric slide rail. The positioning plate is provided on the surface of the placement plate, and the positioning plate is located near the top corner of the right rear side of the placement plate. The auxiliary frame plate is placed on the surface of the placement plate, and the limit assembly cooperates with the positioning plate to limit the auxiliary frame plate, so that the auxiliary frame plate can adapt to and support the circuit board for silk screen solder masking.

[0009] In one of the embodiments, the auxiliary frame plate is replaceably installed on the placement plate, and elastic rubber pads are provided on the clamping surfaces of the clamping rollers.

[0010] In one embodiment, the limiting assembly includes a first motor, a first screw, a first limiting plate, a second motor, a second screw and a second limiting plate, the first motor is mounted on the surface of the base plate, the first screw is rotatably mounted on the base plate, the first screw is horizontally arranged left and right on the base plate, and the output shaft of the first motor is connected to the first screw, the first limiting plate is slidably mounted on the placement plate, the first limiting plate is threadedly connected to the first screw, and a slide groove adapted to the first limiting plate is provided on the placement plate, the second motor is also mounted on the surface of the base plate, the second screw is rotatably mounted on the base plate, the first screw is horizontally arranged front and back on the base plate, and the output shaft of the second motor is connected to the second screw, the second limiting plate is slidably mounted on the placement plate, the second limiting plate is threadedly connected to the second screw, and a slide groove adapted to the second limiting plate is provided on the placement plate, the first motor and the second motor respectively drive the first limiting plate and the second limiting plate to move on the placement plate, so that the first limiting plate and the second limiting plate can adapt to the positioning plate to limit and clamp the placed auxiliary frame plate.

[0011] In one embodiment, the guide frame is provided with a flipping assembly, and the flipping assembly includes a servo motor, a third screw, a one-way gear and a rack. The servo motor is symmetrically installed on the top of the guide frame at the front and rear locations, respectively. The third screw is rotatably installed inside each guide frame. The servo motor is connected to the third screw through a coupling, and the third screw is threadedly connected to the clamping member. The one-way gear is installed on the rotating shaft of the clamping member at two locations. The rack is arranged on each guide frame, and the rack is used to adapt to and mesh with the one-way gear on the same side, and the number of teeth of the rack is half of the number of teeth of the one-way gear. The corresponding third screw is driven to rotate by the servo motor, so that the third screw thread drives the clamping member to rise and fall, and then the one-way gear and the rack are meshed with each other, so that the clamping member is lifted and lowered once and then flipped 180 degrees, thereby realizing automatic flipping of the circuit board for solder mask.

[0012] In one of the embodiments, a width measuring component is also included, and the width measuring component includes a mounting frame, a width measuring camera and a controller. The mounting frame is fixedly installed on the right side of the mounting plate. Two width measuring cameras are provided and are respectively installed on the mounting frame. The two width measuring cameras measure the actual width of the circuit board. The controller is arranged on the right guide plate. The controller is electrically connected to the cylinders at the two locations. After the two width measuring cameras measure the width of the circuit board respectively, the measurement data is transmitted to an external terminal for processing. The processed information is transmitted to the controller. Finally, the controller controls the telescopic rod of the cylinder to extend and retract, so that the mounting frame, the clamping frame and the clamping roller can better adapt to and clamp the circuit board.

[0013] A silk screen solder resist method for a silk screen solder resist flipping device for a circuit board comprises the following steps: S1. Place the circuit board that needs to be printed with silk screen solder mask into the clamping rollers on the front and rear sides for clamping. Then, through the cooperation of the one-way gear and the rack, the servo motor drives the circuit board to move downward to complete the flipping work. After flipping, the auxiliary frame plate is supported on the lower surface of the flipped circuit board, so that the auxiliary frame plate can continuously cooperate with the circuit board to perform silk screen solder mask processing after flipping. S2, respectively driving the first limiting plate and the second limiting plate to move and adjust by the first motor and the second motor, stably limiting the auxiliary frame plates of different sizes placed on the placement plate, so that the auxiliary frame plates of different sizes can better adapt to and support the circuit boards of corresponding sizes for accurate flipping and lifting; S3. Two width measuring cameras are set to measure the width of the circuit board to be processed, and the controller is enabled through the external data processing terminal as a transfer, so that the controller can control the adjustment component to adjust the clamping distance between the clamping components, so that the clamping component can meet the clamping operation of circuit boards of various sizes, thereby facilitating the subsequent turning over and silk screen solder mask processing of circuit boards of different sizes.

[0014] The beneficial effects of the present invention are as follows: 1. The circuit board is rollingly clamped by a plurality of clamping rollers on the front and rear sides, and then a one-way gear is meshed with a rack, so that the servo motor can automatically flip over when the circuit board is driven to rise and fall through the third screw, and at the same time, an electric slide rail is arranged to drive the placement plate to rise and fall, so that the auxiliary frame plate on the placement plate can provide auxiliary support for the flipped circuit board, and the auxiliary frame plate will reset downward after supporting the circuit board to the highest point, thereby achieving the effect of continuous coordination between the auxiliary frame plate and the circuit board.

[0015] 2. By setting a limit assembly on the supporting assembly, the auxiliary frame plate can be positioned at the top angle by the positioning plate, and then the first motor and the second motor respectively drive the first screw and the second screw to rotate, so that the first limit plate and the second limit plate can be clamped on the left and front sides of the auxiliary frame plate respectively, so that the placement plate can place auxiliary frame plates of different sizes, so that the auxiliary frame plate can cooperate with and support circuit boards of corresponding sizes.

[0016] 3. By setting up a width measuring component, the width of the processed circuit board is photographed by a width measuring camera. The photographed data is processed by an external processing terminal and then transmitted back to the controller. The controller controls the activation of the two cylinders, so that the activated cylinders drive the installation frame and the clamping frame to move through the telescopic rod, so that the clamping distance between the front and rear clamping rollers can match the width of the processed circuit board, thereby realizing silk screen solder masking for circuit boards of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the clamping assembly and the supporting assembly of the present invention; Figure 3 It is a schematic diagram of the structure of the inkjet machine, the clamping assembly and the width measuring assembly of the present invention; Figure 4 It is a schematic diagram of the structure of the clamping assembly and the adjusting assembly and other components of the present invention; Figure 5 For the present invention Figure 4 The enlarged view of point A in the middle; Figure 6 It is a schematic diagram of the structure of the clamping assembly and the flipping assembly of the present invention; Figure 7 A diagram showing the connection relationship between the clamping assembly and some components of the flip assembly of the present invention; Figure 8 It is a schematic diagram of the structure of the supporting assembly and the limiting assembly and other components of the present invention; Fig. 9 It is a structural schematic diagram of specific components of the base plate and the limiting assembly of the present invention.

[0018] Among them: 1. Base plate, 100. Circuit board, 2. Bracket, 201. Guide plate, 3. Mounting plate, 4. Sliding frame, 5. Inkjet printer, 6. Drag chain slide module, 7. Clamping assembly, 701. Guide frame, 702. Clamping piece, 703. Sliding block, 704. Mounting frame, 705. Clamping frame, 706. Clamping roller, 707. Motor pulley assembly, 8. Adjustment assembly, 801. Cylinder, 802. Telescopic rod, 803. Spring, 9. Support assembly, 901. Electric slide Rail, 902, placement plate, 903, positioning plate, 904, auxiliary frame plate, 10, limit assembly, 101, first motor, 102, first screw, 103, first limit plate, 104, second motor, 105, second screw, 106, second limit plate, 11, flip assembly, 111, servo motor, 112, third screw, 113, one-way gear, 114, rack, 12, width measuring assembly, 121, mounting bracket, 122, width measuring camera, 123, controller. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0020] Embodiment 1: A circuit board screen printing solder mask flipping device and a screen printing solder mask method, such as Figure 1-Figure 5As shown, it includes: a bottom plate 1, which serves as a load-bearing carrier of the entire device; a bracket 2, which is fixedly connected to the bottom plate 1, and the bracket 2 is a frame supported by four pillars; a guide plate 201, which is symmetrically fixed to the left and right sides of the top of the bracket 2; a mounting plate 3, which is fixedly arranged on the rear side of the top of the bracket 2; a sliding frame 4, which is slidably installed on the front side of the mounting plate 3, and the sliding frame 4 is perpendicular to the mounting plate 3; an inkjet machine 5, which is installed on the sliding frame 4, and the body of the inkjet machine 5 is perpendicular to the sliding frame 4; a drag chain slide module 6, which is arranged on the front side of the mounting plate 3, and the sliding frame 4 is connected to the drag chain slide module 6, and the drag chain slide module 6 drives the entire inkjet machine 5 to move left and right through the sliding frame 4; a clamping assembly 7, which is used to clamp the circuit board 100; the clamping assembly 7 includes a guide frame 701, a clamping member 702, a mounting frame 704, a sliding block 703, a clamping frame 705, a clamping roller 706 and The motor pulley group 707, the guide frame 701 is symmetrically fixed to the front and rear sides of the base plate 1, the guide frame 701 is perpendicular to the base plate 1, and the upper part of the guide frame 701 is provided with a sliding opening. The clamping member 702 is symmetrically slidably installed on the corresponding guide frame 701 through the sliding block 703, the mounting frame 704 is symmetrically installed on the corresponding end of the clamping member 702, and the clamping frame 705 is symmetrically installed inside the corresponding mounting frame 704. A plurality of clamping rollers 706 are provided and rotatably installed inside each of the clamping frames 705. The motor pulley group 707 is provided on each of the clamping frames 705, and the motor pulley group 707 can drive each of the clamping rollers 706 in the same group of the clamping frames 705 to rotate; the adjustment component 8 is symmetrically arranged on each of the guide plates 201, and the adjustment component 8 can adjust the clamping distance between the clamping frames 705 through the mounting frame 704.

[0021] like Figure 3-Figure 5 As shown, the adjustment component 8 includes a cylinder 801, a telescopic rod 802 and a spring 803. The front mounting frame 704 is slidably connected to the guide plate 201. The cylinder 801 is symmetrically installed on the lower side of each guide plate 201. The cylinder 801 is connected to the mounting frame 704 through the telescopic rod 802. A spring 803 is arranged between the mounting frame 704 and the clamping frame 705. The cylinder 801 can adjust the interval between the two mounting frames 704 through the telescopic rod 802, so that the clamping roller 706 in the clamping frame 705 can adapt to and clamp circuit boards 100 of different sizes.

[0022] like Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, the guide frame 701 is provided with a flip assembly 11, and the flip assembly 11 includes a servo motor 111, a third screw 112, a one-way gear 113 and a rack 114. The servo motor 111 is symmetrically installed at the top of the guide frame 701 at the front and rear positions, respectively. The third screw 112 is rotatably installed inside each guide frame 701. The servo motor 111 is connected to the third screw 112 through a coupling. The third screw 112 is threadedly connected to the clamping member 702. The one-way gear 113 is installed on the rotating shafts of the clamping members 702 at two positions. The rack 114 is arranged on each of the guide frames 701, and is used to adapt to and mesh with the one-way gear 113 on the same side, and the number of teeth of the rack 114 is half of the number of teeth of the one-way gear 113. The corresponding third screw 112 is driven to rotate by the servo motor 111, so that the third screw 112 threadedly drives the clamping member 702 to rise and fall, and then the one-way gear 113 and the rack 114 are engaged with each other, so that the clamping member 702 is lifted once and then flipped 180 degrees, thereby realizing automatic flipping of the circuit board 100 for solder resistance.

[0023] like Figure 1 and Figure 3 As shown, it also includes a width measuring component 12, which includes a mounting frame 121, a width measuring camera 122 and a controller 123. The mounting frame 121 is fixedly installed on the right side of the mounting plate 3. Two width measuring cameras 122 are provided and are respectively installed on the mounting frame 121. The two width measuring cameras 122 can measure the actual width of the circuit board 100. The controller 123 is arranged on the right side of the guide plate 201. The controller 123 is electrically connected to the cylinders 801 at the two locations. After the two width measuring cameras 122 measure the width of the circuit board 100 respectively, the measurement data is transmitted to the external terminal for processing. The processed information will be transmitted to the controller 123. The controller 123 finally controls the telescopic rod 802 of the cylinder 801 to extend and retract, so that the mounting frame 704, the clamping frame 705 and the clamping roller 706 can better adapt to and clamp the circuit board 100.

[0024] When the circuit board 100 screen printing solder mask flipping device is used to perform screen printing solder mask on the circuit board 100, the operator first pushes the circuit board 100 to be processed horizontally to the right side of the bracket 2. At this time, the two width measuring cameras 122 will measure the width of the placed circuit board 100, and the data measured by the width measuring camera 122 will be transmitted to the remote data processing terminal. The signal processed by the data processing terminal will be returned to the controller 123. At this time, the controller 123 that receives the signal will synchronously control the cylinders 801 at the two locations to work. The cylinder 801 drives the front installation frame 704 to move through the telescopic rod 802, and the moving installation frame 704 synchronously drives the clamping frame 705 and the clamping roller 706 to move as a whole. When the circuit board 100 is pushed between the clamping rollers 706 on the front and rear sides, the motor pulley group 707 is activated, and the motor pulley group 707 will drive the multiple clamping rollers 706 at the front and rear to rotate synchronously, so that the inserted circuit board 100 can be transported to a suitable processing position by the multiple clamping rollers 706 on both sides. At this time, under the action of the spring 803, the clamping rollers 706 on both sides can further stably clamp the circuit board 100 that has arrived at a suitable processing position, and then the drag chain slide module 6 is activated, and the drag chain slide module 6 will drive the inkjet machine 5 to translate left and right through the sliding frame 4, so that the inkjet machine 5 can move on the circuit board The painting work is completed on one side of 100. When the other side needs to be painted, the servo motor 111 is activated. The servo motors 111 on the front and rear sides drive the corresponding third screws 112 to rotate through the coupling. The third screws 112 rotating at the front and rear locations drive the sliding block 703 to move down on the corresponding guide frame 701 through the thread. At this time, the sliding block 703 moving down will synchronously drive the clamping member 702, the installation frame 704, the clamping frame 705 and the clamping roller 706 to move downward synchronously as a whole, until the downward one-way gears 113 on the front and rear sides are engaged with the corresponding racks 114, so that the one-way gear 113 drives the clamping member 702, the installation frame 704, the clamping frame 705 and the clamping roller 706 to flip 180 degrees as a whole, and then In this way, the circuit board 100 clamped by the clamping rollers 706 on both sides can be automatically turned over. Similarly, when the servo motor 111 reversely drives the circuit board 100 to rise, the rising one-way gear 113 will not be able to drive the circuit board 100 to turn over after engaging the rack 114, until the servo motor 111 reversely drives the circuit board 100 to rise and reset to the painting processing plane. The drag chain slide module 6 is activated again to drive the inkjet machine 5 to paint the other side of the circuit board 100 after it is turned over. When both sides of the circuit board 100 are sprayed, the clamping roller 706 is driven by the motor pulley group 707 to directly transport the painted circuit board 100 out for subsequent silk screen solder mask processing.

[0025] Embodiment 2: Based on embodiment 1, Figure 1 , Figure 2 and Figure 6 As shown, a support assembly 9 is provided on the base plate 1, and the support assembly 9 includes an electric slide rail 901, a placement plate 902, a positioning plate 903, an auxiliary frame plate 904 and a limiting assembly 10. The electric slide rail 901 is provided on the inner side walls of the four pillars of the bracket 2, and the placement plate 902 is slidably installed on the bracket 2 through the electric slide rail 901. The positioning plate 903 is provided on the surface of the placement plate 902, and the positioning plate 903 is located near the top corner of the right rear side of the placement plate 902. The auxiliary frame plate 904 is placed on the surface of the placement plate 902. The limiting assembly 10 cooperates with the positioning plate 903 to limit the auxiliary frame plate 904, so that the auxiliary frame plate 904 can adapt to and support the circuit board 100 for silk screen solder masking; the auxiliary frame plate 904 is replaceably installed on the placement plate 902, and elastic rubber pads are provided on the clamping surfaces of the clamping rollers 706.

[0026] like Figure 2 , Figure 6 , Figure 8 and Fig. 9 As shown, the limiting assembly 10 includes a first motor 101, a first screw 102, a first limiting plate 103, a second motor 104, a second screw 105 and a second limiting plate 106, the first motor 101 is installed on the surface of the base plate 1, the first screw 102 is rotatably installed on the base plate 1, the first screw 102 is horizontally arranged on the base plate 1, and the output shaft of the first motor 101 is connected to the first screw 102, the first limiting plate 103 is slidably installed on the placement plate 902, the first limiting plate 103 is threadedly connected to the first screw 102, the placement plate 902 is provided with a sliding groove adapted to the first limiting plate 103, the second motor 104 is also installed on the surface of the base plate 1, the The second screw 105 is rotatably installed on the base plate 1, the first screw 102 is horizontally placed front and back on the base plate 1, and the output shaft of the second motor 104 is connected to the second screw 105, the second limit plate 106 is slidably installed on the placement plate 902, the second limit plate 106 is threadedly connected to the second screw 105, and the placement plate 902 is also provided with a sliding groove adapted to the second limit plate 106, the first motor 101 and the second motor 104 respectively drive the first limit plate 103 and the second limit plate 106 to move on the placement plate 902, so that the first limit plate 103 and the second limit plate 106 can adapt to the positioning plate 903 to limit and clamp the placed auxiliary frame plate 904.

[0027] Before silk-screen solder mask is performed on circuit boards 100 of different sizes, the operator first selects an auxiliary frame plate 904 that matches the size of the circuit board 100 and places it on the placement plate 902, first aligns one vertex of the auxiliary frame plate 904 with the positioning plate 903, and then drives the first screw 102 to rotate through the first motor 101, so that the first screw 102 threadably drives the first limiting plate 103 to be limited to the left side of the auxiliary frame plate 904, and at the same time drives the second screw 105 to rotate through the second motor 104, so that the second screw 105 threadably drives the second limiting plate 106 to be limited to the front side of the auxiliary frame plate 904, thereby limiting the placed circuit board 100 through the first limiting plate 103 and the second limiting plate 106, and at the same time cooperates with the positioning plate 903 to enable the circuit board 100 to be accurately positioned. On the placement plate 902, when the servo motor 111 drives the entire clamping assembly 7 to complete the flipping of the circuit board 100, the placement plate 902 is driven upward by the electric slide rail 901, so that the auxiliary frame plate 904 on the placement plate 902 can rise until the auxiliary frame plate 904 contacts and supports the lower surface of the circuit board 100. The servo motor 111 and the electric slide rail 901 cooperate with each other to enable the auxiliary frame plate 904 to be synchronously supported on the lower surface of the circuit board 100 until the circuit board 100 rises and the plane is processed. Then, the placement plate 902 and the auxiliary frame plate 904 are driven by the electric slide rail 901 to slide down synchronously and reset, ready to support and cooperate with the next flipped circuit board 100, thereby achieving continuous cooperation and separation between the auxiliary frame plate 904 and the circuit board 100.

[0028] A silk screen solder resist method for a silk screen solder resist flipping device for a circuit board 100, comprising the following steps: S1. Place the circuit board 100 to be printed with silk screen solder mask into the clamping rollers 706 on the front and rear sides for clamping, and then the servo motor 111 drives the circuit board 100 to move downward through the cooperation of the one-way gear 113 and the rack 114 to complete the flipping work. After flipping, the auxiliary frame plate 904 is supported on the lower surface of the flipped circuit board 100, so that the auxiliary frame plate 904 can continuously cooperate with the circuit board 100 to perform silk screen solder mask processing after flipping; S2, the first motor 101 and the second motor 104 are used to respectively drive the first limiting plate 103 and the second limiting plate 106 to move and adjust, so as to stably limit the auxiliary frame plates 904 of different sizes placed on the placement plate 902, so that the auxiliary frame plates 904 of different sizes can better adapt to and support the circuit boards 100 of corresponding sizes to perform accurate flipping and lifting; S3. Two width measuring cameras 122 are set to measure the width of the circuit board 100 to be processed, and the controller 123 is enabled through the external data processing terminal as a transfer, so that the controller 123 can control the adjustment component 8 to adjust the clamping distance between the clamping components 7, so that the clamping component 7 can meet the clamping operation of circuit boards 100 of various sizes, thereby facilitating the subsequent turning over and silk screen solder mask processing of circuit boards 100 of different sizes.

[0029] While the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that numerous other embodiments can be devised which do not depart from the scope of the invention.

Claims

1. A circuit board silk screen solder mask flipping device, comprising: a base plate (1) serving as a load-bearing carrier of the entire device; a bracket (2) fixedly connected to the base plate (1), the bracket (2) being a frame supported by four pillars; a guide plate (201) symmetrically fixedly connected to the left and right sides of the top of the bracket (2); a mounting plate (3) fixedly arranged on the rear side of the top of the bracket (2); a sliding frame (4) slidably mounted on the front side of the mounting plate (3), the sliding frame (4) being perpendicular to the mounting plate (3); an inkjet machine (5) mounted on the sliding frame (4), the body of the inkjet machine (5) being perpendicular to the sliding frame (4); a drag chain slide module (6) arranged on the front side of the mounting plate (3), the sliding frame (4) being connected to the drag chain slide module (6); wherein the guide plate (201) is symmetrically fixedly connected to the left and right sides of the top of the bracket (2); a mounting plate (3) fixedly arranged on the rear side of the top of the bracket (2); a sliding frame (4) slidably mounted on the front side of the mounting plate (3), the sliding frame (4) being perpendicular to the mounting plate (3); a inkjet machine (5) being mounted on the sliding frame (4), the body of the inkjet machine (5) being perpendicular to the sliding frame (4); a drag chain slide module (6) being arranged on the front side of the mounting plate (3), the sliding frame (4) being connected to the drag chain slide module (6); wherein the guide plate (201) is symmetrically fixedly connected to the left and right sides of the top of the bracket (2); a mounting plate (3) fixedly arranged on the rear side of the top of the bracket (2); a sliding frame (4) slidably mounted on the front side of the mounting plate (3), the sliding frame (4) being perpendicular to the mounting plate (3); a include: A clamping assembly (7), wherein the clamping assembly (7) comprises a guide frame (701), a clamping member (702), a mounting frame (704), a sliding block (703), a clamping frame (705), a clamping roller (706) and a motor pulley group (707), wherein the guide frame (701) is symmetrically fixed to the front and rear sides of the base plate (1), the guide frame (701) is perpendicular to the base plate (1), a sliding opening is provided on the upper part of the guide frame (701), the clamping member (702) is symmetrically slidably installed on the corresponding guide frame (701) through the sliding block (703), and the The mounting frame (704) is symmetrically mounted on the corresponding end of the clamping member (702); the clamping frame (705) is symmetrically mounted inside the corresponding mounting frame (704); a plurality of clamping rollers (706) are provided and are rotatably mounted inside each of the clamping frames (705); the motor pulley group (707) is provided on each of the clamping frames (705); the motor pulley group (707) drives each of the clamping rollers (706) in the same group of the clamping frames (705) to rotate; and an adjustment component (8) is symmetrically arranged on each of the guide plates (201).

2. A circuit board silk screen solder mask flipping device according to claim 1, characterized in that: The adjustment assembly (8) comprises a cylinder (801), a telescopic rod (802) and a spring (803); the installation frame (704) on the front side is slidably connected to the guide plate (201); the cylinder (801) is symmetrically installed on the lower side of each guide plate (201); the cylinder (801) is connected to the installation frame (704) through the telescopic rod (802); and a spring (803) is provided between the installation frame (704) and the clamping frame (705).

3. A circuit board silk screen solder mask flipping device according to claim 2, characterized in that: A support assembly (9) is provided on the base plate (1), and the support assembly (9) includes an electric slide rail (901), a placement plate (902), a positioning plate (903), an auxiliary frame plate (904) and a limiting assembly (10). The electric slide rail (901) is provided on the inner side walls of the four pillars of the bracket (2), the placement plate (902) is slidably installed on the bracket (2) through the electric slide rail (901), the positioning plate (903) is provided on the surface of the placement plate (902), the auxiliary frame plate (904) is placed on the surface of the placement plate (902), and the limiting assembly (10) cooperates with the positioning plate (903) to limit the auxiliary frame plate (904).

4. A circuit board silk screen solder mask flipping device according to claim 3, characterized in that: The auxiliary frame plate (904) is replaceably mounted on the placement plate (902), and elastic rubber pads are provided on the clamping surfaces of the clamping rollers (706).

5. A circuit board silk screen solder mask flipping device according to claim 4, characterized in that: The limiting assembly (10) comprises a first motor (101), a first screw (102), a first limiting plate (103), a second motor (104), a second screw (105) and a second limiting plate (106); the first motor (101) is mounted on the surface of the base plate (1); the first screw (102) is rotatably mounted on the base plate (1); the first screw (102) is horizontally arranged on the base plate (1); the output shaft of the first motor (101) is connected to the first screw (102); the first limiting plate (103) is slidably mounted on the placement plate (902); the first limiting plate (103) and the first screw (102) are screw-mounted to each other; The placing plate (902) is connected by a groove, the placing plate (902) is provided with a slide groove matched with the first limit plate (103), the second motor (104) is also installed on the surface of the base plate (1), the second screw rod (105) is rotatably installed on the base plate (1), the first screw rod (102) is horizontally arranged front and back on the base plate (1), and the output shaft of the second motor (104) is connected with the second screw rod (105), the second limit plate (106) is slidably installed on the placing plate (902), the second limit plate (106) is threadedly connected with the second screw rod (105), and the placing plate (902) is also provided with a slide groove matched with the second limit plate (106).

6. A circuit board silk screen solder mask flipping device according to claim 5, characterized in that: The guide frame (701) is provided with a flip assembly (11), and the flip assembly (11) includes a servo motor (111), a third screw rod (112), a one-way gear (113) and a rack (114). The servo motor (111) is symmetrically mounted on the top of the guide frame (701) at two locations, front and rear, respectively. The third screw rod (112) is rotatably mounted inside each guide frame (701). The servo motor (111) is connected to the guide frame (701) via a coupling. The third screw rod (112) is connected to the clamping member (702), the third screw rod (112) is threadedly connected to the clamping member (702), the one-way gear (113) is installed on the rotating shaft of the two clamping members (702), the rack (114) is arranged on each of the guide frames (701), the rack (114) is adapted to and meshes with the one-way gear (113) on the same side, and the number of teeth of the rack (114) is half the number of teeth of the one-way gear (113).

7. A circuit board silk screen solder mask flipping device according to claim 6, characterized in that: The invention also comprises a width measuring assembly (12), wherein the width measuring assembly (12) comprises a mounting frame (121), a width measuring camera (122) and a controller (123), wherein the mounting frame (121) is fixedly mounted on the right side of the mounting plate (3), two width measuring cameras (122) are provided and are respectively mounted on the mounting frame (121), and the controller (123) is arranged on the right side of the guide plate (201), and the controller (123) is electrically connected to the cylinders (801) at two locations, and the width measuring camera (122) is linked to the controller (123) via an external data processing terminal.

8. A silk screen solder resist method for a circuit board silk screen solder resist flipping device, which uses a circuit board silk screen solder resist flipping device as claimed in claim 7, characterized in that: The following steps are involved: S1, placing the circuit board (100) to be printed with silk screen solder mask into the clamping rollers (706) on the front and rear sides for clamping, and then through the cooperation of the one-way gear (113) and the rack (114), the servo motor (111) drives the circuit board (100) to move downward to complete the flipping work, and after flipping, the auxiliary frame plate (904) is supported on the lower surface of the flipped circuit board (100), so that the auxiliary frame plate (904) can continuously cooperate with the circuit board (100) to perform silk screen solder mask processing after flipping; S2, using the first motor (101) and the second motor (104) to respectively drive the first limiting plate (103) and the second limiting plate (106) to move and adjust, so as to stably limit the auxiliary frame plates (904) of different sizes placed on the placement plate (902), so that the auxiliary frame plates (904) of different sizes can better adapt to and support the circuit boards (100) of corresponding sizes for accurate turning over and lifting; S3. Two width measuring cameras (122) are arranged to measure the width of the circuit board (100) to be processed, and the controller (123) is activated through the external data processing terminal as a transfer, so that the controller (123) can control the adjustment component (8) to adjust the clamping distance between the clamping components (7), so that the clamping components (7) can meet the clamping operation of circuit boards (100) of various sizes, thereby facilitating the subsequent turning over and silk screen solder mask processing of circuit boards (100) of different sizes.

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