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CN-122028325-A - Pcb board detection repair welding integrated machine

CN122028325ACN 122028325 ACN122028325 ACN 122028325ACN-122028325-A

Abstract

The invention relates to the technical field of pcb detection repair welding, and provides a pcb detection repair welding integrated machine which comprises a bottom frame, wherein a placement frame is fixedly connected to the top end of the bottom frame, a scanner is fixedly connected to the rear side of the top end of the placement frame, a storage plate is connected to the inner wall of the top side of the placement frame through a moving assembly, a positioning plate is arranged at the top end of the storage plate, a tenon rod is connected to the inner wall of the positioning plate in a sliding manner, a display screen is connected to the left end of the placement frame through a supporting assembly, a butt welding machine host is fixedly connected to the inner wall of the front side of the bottom frame, a hand-held butt welding electrode is connected to the front end of the butt welding machine host through an electrode connecting wire, the moving assembly comprises an electric sliding rail positioned on the inner wall of the top side of the placement frame, and a sliding sleeve is connected to the top end of the electric sliding rail in a sliding manner. Through integrating pcb board location, scanning detection, defect analysis, repair welding guide and reinspection verification in same equipment, drive through electronic slide rail and put thing board accurate switching detection and repair welding station, need not the manual work and transport pcb board, shorten process linking time by a wide margin.

Inventors

  • ZHENG XIANGWEN
  • Zheng Qiudong

Assignees

  • 浙江凯捷利电子有限公司

Dates

Publication Date
20260512
Application Date
20251230

Claims (10)

  1. Pcb board detects repair welding all-in-one, a serial communication port, including chassis (1), chassis (1) top fixedly connected with rack (2), rack (2) top rear side fixedly connected with scanner (3), rack (2) topside inner wall is connected with puts thing board (6) through moving the subassembly, it is provided with locating plate (7) to put thing board (6) top, locating plate (7) inner wall sliding connection has tenon pole (8), rack (2) left end is connected with display screen (13) through supporting component, chassis (1) front side inner wall fixedly connected with butt-joint machine host computer (14), butt-joint machine host computer (14) front end is connected with handheld butt-joint electrode (16) through electrode connecting wire (15).
  2. 2. The pcb board detection repair welding integrated machine according to claim 1, wherein the moving assembly comprises an electric sliding rail (4) positioned on the inner wall of the top side of the placing frame (2), the top end of the electric sliding rail (4) is slidably connected with a sliding sleeve (5), and the top end of the sliding sleeve (5) is fixedly connected with the bottom end of the placing board (6).
  3. 3. The pcb board detection repair welding all-in-one machine according to claim 1, wherein the support assembly comprises a first fixing rod (9) positioned at the left end of the placement frame (2), a connecting rod (10) is connected to the top end of the first fixing rod (9) through damping rotation, a second fixing rod (11) is connected to the top end of the connecting rod (10) through damping rotation, a fixing frame (12) is connected to the front end of the second fixing rod (11) through damping rotation, and the front end of the fixing frame (12) is fixedly connected to the rear end of the display screen (13).
  4. 4. The pcb board detection repair welding integrated machine according to claim 1, wherein a plurality of spacing grooves are formed in the top end of the object placing board (6) after being arrayed at equal intervals, and the tenon rod (8) is arranged in the spacing groove formed in the top end of the object placing board (6) and used for limiting the positioning board (7) and positioning the pcb board.
  5. 5. The pcb board detection and repair welding integrated machine according to claim 1, wherein an electrode fixing seat (17) is fixedly connected to the right side of the front end of the placement frame (2), and the inner wall of the electrode fixing seat (17) is arranged on the outer wall of the hand-held butt-welding electrode (16).
  6. 6. The pcb board detection and repair welding integrated machine according to claim 1, wherein a drawer (18) is slidably connected to the front end of the placement frame (2), and a mouse and a keyboard can be placed on the top end of the drawer (18).
  7. Pcb board intelligent contrast detection system, using pcb board detection repair welding all-in-one machine according to any of claims 1-6, characterized in that it comprises the following steps: Positioning and fixing, namely placing the pcb on a storage plate (6), clamping by a positioning plate (7), and embedding a tenon rod (8) into a limit groove to finish positioning, so as to ensure that the pcb is free from displacement in the detection process; scanning and collecting, namely starting a scanner (3) to perform global high-resolution scanning on the pcb board, obtaining image data of welding spots and wiring, wherein the image resolution is more than or equal to 2400dpi, and calling pre-stored CAD standard design data of the pcb board of the model; step three, intelligent comparison analysis, namely performing pixel-by-pixel matching on the acquired image and CAD standard data through a system built-in algorithm, identifying the defects of cold joint, broken wire and short circuit, and outputting the defect type, the coordinate position and the defect size parameter; The defect visualization guiding is that a display screen (13) highlights the defect position, enlarges and displays details, synchronously displays recommended repair welding parameters and operation guidance corresponding to the defect, and an electric sliding rail (4) drives a storage plate (6) to move to a repair welding station convenient for manual operation; Step five, performing handheld repair welding, namely taking down a handheld butt-welding electrode (16) from an electrode fixing seat (17) by an operator, aligning and attaching double electrodes to a defect area according to the guidance of a display screen (13), stabilizing output current and electrode pressure by a butt-welding machine host (14) according to recommended parameters, and maintaining the pressure for 0.5s after electrifying and welding to finish the handheld butt-welding operation; and step six, rechecking the closed loop, namely, after repair welding is finished, driving the pcb board to return to a scanning area by the electric sliding rail (4), rechecking the defective area by the scanner (3), generating a detection report if the system is qualified through secondary comparison and verification, and repeating the step four and the step five if the system is unqualified.
  8. 8. The pcb board detection repair welding integrated machine according to claim 7, comprising an image acquisition module, a standard database unit, an intelligent contrast analysis module, a defect positioning guide unit and a repair welding parameter recommendation unit; The image acquisition module consists of a scanner (3) and an image preprocessing unit, wherein the preprocessing unit removes image noise through a noise reduction algorithm, enhances the contour contrast of welding spots and wires, and outputs effective image data; the standard database unit is integrated in the system host, stores CAD design parameters of pcb boards of different models, including solder joint diameter, wiring width and spacing threshold, and supports data import and update; The intelligent comparison analysis module comprises a welding spot feature extraction unit and a wiring integrity verification unit, and the accurate comparison of the acquired data and the standard data is realized through a feature matching algorithm; The defect positioning guide unit is internally provided with a coordinate conversion unit which converts the defect coordinates into manually identifiable operation coordinates; The repair welding parameter recommending unit is in signal linkage with a butt welding machine host (14), automatically matches recommended parameters according to defect types, and stores optimal butt welding schemes of a plurality of groups of typical defects.
  9. 9. The pcb board detection and repair welding integrated machine according to claim 7, wherein the intelligent comparison analysis module adopts a multi-dimensional judgment algorithm, and specifically comprises a welding spot gray level matching algorithm, a wiring connectivity verification algorithm, a pitch interference detection algorithm and a misjudgment filtering mechanism; The welding spot gray level matching algorithm extracts a gray level average value G x of a welding spot area, compares the gray level average value G x with a reference gray level G 0 corresponding to CAD standard data, sets a judgment threshold value delta G=3%, and judges that the welding spot is defective when the delta G x -G 0 is more than delta G; The wiring connectivity verification algorithm obtains a wiring central line through a skeleton extraction technology, calculates a central line communication rate C, sets a qualified threshold C to be more than or equal to 99.5%, and judges that the wiring is broken when the C is less than 99.5%; The interval interference detection algorithm calculates the minimum distance D of the adjacent wire edges, compares the minimum distance D with the standard interval D 0 , and judges that the adjacent wire edges are short-circuit risk defects when the D is less than D 0 multiplied by 80%; and the misjudgment filtering mechanism performs 5-frame continuous image acquisition verification on the suspected defect area, and only when 5 frames of data meet the defect judgment conditions, the defect signal is output, and the misjudgment rate is less than or equal to 0.3%.
  10. 10. The pcb board inspection repair welding integrated machine of claim 7, further comprising a repair welding parameter self-adaptive adjustment unit, a working state monitoring unit, and a defect tracing unit; The repair welding parameter self-adaptive adjusting unit dynamically adjusts recommended parameters according to the defect size, if the broken line length L is less than or equal to 0.5mm, the recommended current is 800+/-50A, the electrode pressure is 10+/-2N, the electrifying time is 20+/-2 ms, and when the L is 0.5mm, the recommended current is 1500+/-50A, the electrode pressure is 30+/-2N, the electrifying time is 50+/-2 ms, and the parameters can be manually adjusted to be +/-50A/+/-2N/+/-2 ms through a keyboard; the operation state monitoring unit monitors output current, electrode pressure and electrifying time of the butt welding machine in real time, and when the current deviates from a set value by +/-10%, the pressure is lower than the set value by 5N or continuous operation exceeds 30min, the display screen pops a window to give an alarm and prompt to calibrate the electrode; The defect traceability unit automatically records the defect position, repair welding parameters, operators and detection results of each pcb, the storage duration is more than or equal to 2 years, and accurate inquiry traceability according to batches and dates is supported.

Description

Pcb board detection repair welding integrated machine Technical Field The invention relates to the technical field of pcb board detection repair welding, in particular to a pcb board detection repair welding integrated machine. Background Along with the rapid development of the electronic information industry, pcb boards are used as core bearing and connecting components of electronic equipment, and are widely applied to various fields of communication equipment, consumer electronics, industrial control, automobile electronics and the like, the production quality of the pcb boards is directly related to the reliability and service life of terminal products, and the requirements of the market on the detection precision, repair welding efficiency and quality stability of pcb boards are continuously improved. At present, the defect detection and repair welding of pcb boards in industry mostly adopts a 'separated operation' mode, namely, defect identification is finished through independent detection equipment and a report is generated, then the pcb boards are manually transported to a repair welding station by an operator, and the defect position is manually searched and repair welding is carried out according to the report. Because the detection and repair welding equipment are mutually independent, the pcb board is easy to displace due to slight collision and improper taking in the transferring process, so that the defect position is required to be reconfirmed during repair welding, the operation time consumption is increased, the repair welding parameters are required to be set by an operator according to the defect description and self experience, the optimal repair welding requirements of different types and size defects are difficult to precisely match, the repair welding effect is possibly influenced, meanwhile, the process connection depends on manual operation, and the overall efficiency is greatly influenced by the proficiency of personnel. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a pcb board detection repair welding integrated machine, which solves the problems that the conventional pcb board detection repair welding adopts separated operation, the conventional detection relies on manual experience, the misjudgment rate is high, repair welding parameters are difficult to accurately match with different defect requirements, and the whole flow data recording and tracing are lacking in the operation flow. The pcb board detection repair welding integrated machine comprises a bottom frame, wherein a placement frame is fixedly connected to the top end of the bottom frame, a scanner is fixedly connected to the rear side of the top end of the placement frame, a storage board is connected to the inner wall of the top side of the placement frame through a moving assembly, a positioning plate is arranged on the top end of the storage board, a tenon rod is connected to the inner wall of the positioning plate in a sliding manner, a display screen is connected to the left end of the placement frame through a supporting assembly, a butt welding machine host is fixedly connected to the inner wall of the front side of the bottom frame, and a hand-held butt welding electrode is connected to the front end of the butt welding machine host through an electrode connecting wire. Preferably, the movable assembly comprises an electric sliding rail positioned on the inner wall of the top side of the placing frame, the top end of the electric sliding rail is slidably connected with a sliding sleeve, and the top end of the sliding sleeve is fixedly connected with the bottom end of the placing plate. Preferably, the support assembly comprises a first fixing rod positioned at the left end of the placement frame, a connecting rod is connected to the top end of the first fixing rod through damping rotation, a second fixing rod is connected to the top end of the connecting rod through damping rotation, a fixing frame is connected to the front end of the second fixing rod through damping rotation, and the front end of the fixing frame is fixedly connected to the rear end of the display screen. Preferably, the top end of the storage plate is provided with a plurality of spacing grooves which are arrayed at equal intervals, and the tenon rod is arranged in the spacing groove which is formed in the top end of the storage plate and used for limiting the positioning plate and positioning the pcb plate. Preferably, the right side of the front end of the placement frame is fixedly connected with an electrode fixing seat, and the inner wall of the electrode fixing seat is arranged on the outer wall of the hand-held butt-welded electrode. Preferably, the front end of the placement frame is connected with a drawer in a sliding manner, and a mouse and a keyboard can be placed at the top end of the drawer. Pcb board intelligent contrast detecting system includes the following steps: Positioning and