Machine type assembly jig for PCB (Printed Circuit Board)

Abstract

The invention relates to the field of circuit board jigs, and discloses a PCB machine type assembly jig which comprises a jig seat, a circular limiting groove is formed in the middle of the interior of the jig seat, a counter weight circular truncated cone is rotationally arranged in the circular limiting groove, and an edge covering jig is arranged at the left position of the upper end face of the jig seat. The elastic sealing rod is designed, on one hand, the suction cup positioner moves downwards to block the lower end of the elastic sealing rod in the tool hole, the interior of the small suction cup is sealed, and therefore the suction work of the suction cup is assisted; on the other hand, the circuit board positioning pins are accurately inserted into the corresponding tool holes, the elastic sealing rods are moved out of the tool holes, in the upward displacement process of the elastic sealing rods, the blocking sliding blocks slide along the sliding grooves and are exposed out of the exhaust holes, air enters the small suction cups and the inner cavity, and the small suction cups lose the adsorption effect; the lifting air cylinder rod directly drives the suction cup positioner to return upwards, the small suction cup and the flexible circuit board are automatically separated, and the automatic air inlet separation effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of circuit board fixtures, and particularly to a PCB circuit board machine assembly fixture. Background Technology

[0002] PCBs are generally divided into three types: rigid PCBs, flexible PCBs, and rigid-flex PCBs. Among them, flexible PCBs are made of flexible substrates and can be bent, folded, and rolled. They also serve to connect electronic components and have technical advantages such as being thin, flexible, capable of three-dimensional assembly, space-saving, and resistant to high and low temperatures. Flexible PCBs require pressing, edge wrapping, surface mounting, testing, and installation processes during production, so assembly fixtures are used.

[0003] Existing flexible circuit board assembly fixtures have several technical design flaws. First, in processes such as edge banding and installation, flexible circuit boards require manual positioning and assembly, which is time-consuming and labor-intensive, resulting in low automation and low positioning accuracy. Second, current edge banding fixtures have poor heating and cooling effects, leading to low effectiveness and efficiency in using hot melt adhesive for edge banding. Third, due to the flexibility and toughness of flexible circuit boards, they are prone to local bulges and wrinkles when placed on a transport machine, causing unevenness and interfering with subsequent precise gripping.

[0004] In summary, considering that existing facilities cannot meet the needs of work, we propose a PCB circuit board machine assembly fixture. Summary of the Invention

[0005] The main objective of this invention is to provide a PCB circuit board machine assembly fixture, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A PCB circuit board machine assembly fixture includes a fixture base. A circular limiting groove is formed in the middle of the fixture base. A counterweight frustum is rotatably arranged in the circular limiting groove. A limiting sliding step is formed around the outer side of the counterweight frustum. A support shaft is vertically connected to the middle of the bottom of the counterweight frustum. The lower end of the support shaft is connected to the bottom of the fixture base through a damping bearing seat. A four-part drive groove wheel is sleeved on the support shaft. Four sets of wheel grooves are symmetrically formed on the wheel surface of the four-part drive groove wheel. Four sets of arc-shaped contact surfaces are also formed on the wheel surface of the four-part drive groove wheel, which are alternate with the wheel grooves.

[0007] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, wherein: a servo motor is installed on one side of the support shaft, a drive disk is connected to the output shaft of the servo motor, a guide block that interacts with the arc-shaped contact surface is fixed at the middle position of the lower end face of the drive disk, and an eccentric column that interacts with the wheel groove is welded to the side position of the lower end face of the drive disk.

[0008] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, wherein: a connecting column is vertically connected to the upper middle position of the counterweight truncated cone, a horizontal cylinder seat is fixed to the upper end of the connecting column, a lifting cylinder is vertically installed on the outer side of the upper end face of the horizontal cylinder seat, a lifting cylinder rod is movably arranged inside the lifting cylinder through the horizontal cylinder seat, a suction cup positioner is connected to the lower end of the lifting cylinder rod, an air suction pump is installed in the middle position inside the suction cup positioner, a four-hole connector is installed at the air suction port of the air suction pump, and four sets of suction pipes are installed on the four-hole connector.

[0009] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, each set of suction pipes is connected to a suction sleeve at its end. The upper end of the suction sleeve is connected to the inner wall of the suction cup positioner by a riveting block. The lower end of the suction sleeve is connected to a small suction cup. The small suction cup acts on the periphery of the tool hole corresponding to the flexible circuit board. There are a total of 4 sets of tool holes. The suction sleeve has an inner cavity that extends downward through it. The outer side of the suction sleeve has an exhaust hole that communicates with the inner cavity.

[0010] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, wherein: an elastic sealing rod is movably disposed in the middle of the inner cavity, the lower end of the elastic sealing rod acts on the tool hole, a limiting spring sleeve is installed at the upper end of the elastic sealing rod, a spring fixed to the riveting block is disposed inside the limiting spring sleeve, a sliding groove is formed on the cavity wall of the inner cavity, and a sealing slider that moves in the sliding groove is fixed on the outer side of the elastic sealing rod, the sealing slider acts on the exhaust hole.

[0011] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, a material conveyor is installed at the front position of the upper end face of the fixture seat. The material conveyor extends horizontally outside the fixture seat. The material conveyor includes a chain plate with circular motion and a limiting side baffle. The two sets of limiting side baffles are symmetrically distributed. A flexible circuit board is placed on the chain plate in the forward direction. The number of flexible circuit boards is preferably 1-8 sets. A transverse baffle that acts on the flexible circuit board is installed at the end of the material conveyor.

[0012] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, wherein: an edge-wrapping fixture is provided on the left side of the upper end face of the fixture base; a first opening groove is provided on the top of the edge-wrapping fixture; two sets of long edge-wrapping sleeves and two sets of short edge-wrapping sleeves are symmetrically distributed inside the first opening groove; a long edge-wrapping L-shaped moving rod is connected to the lower end of each set of long edge-wrapping sleeves; long edge-wrapping rod teeth are provided on the bottom side of the long edge-wrapping L-shaped moving rod; a short edge-wrapping L-shaped moving rod is connected to the lower end of each set of short edge-wrapping sleeves; short edge-wrapping rod teeth are provided on the bottom side of the short edge-wrapping L-shaped moving rod; and guide rail grooves for the movement of the long edge-wrapping L-shaped moving rods and the short edge-wrapping L-shaped moving rods are respectively provided at the bottom of the first opening groove; the number of guide rail grooves is 4 sets.

[0013] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, the following features: a mechanical housing is riveted to the middle of the inner part of the edge-sealing fixture; a second servo motor is horizontally mounted inside the mechanical housing; a drive bevel gear is sleeved on the output end of the second servo motor; a first transmission bevel gear and a second transmission bevel wheel are respectively meshed on the drive bevel gear; the first transmission bevel gear is sleeved on the lower end of a first rotating shaft; the first rotating shaft passes upward through the top of the mechanical housing; the first rotating shaft is connected to the inner wall of the edge-sealing fixture through a first bearing seat; a first bidirectional gear is sleeved on the first rotating shaft; the first bidirectional gear meshes synchronously with two sets of short edge-sealing rod teeth; the second transmission bevel wheel is sleeved on the upper end of a second rotating shaft; the second rotating shaft passes downward through the bottom of the mechanical housing; the second rotating shaft is connected to the inner wall of the edge-sealing fixture through a second bearing seat; a second bidirectional gear is sleeved on the second rotating shaft; the second bidirectional gear meshes synchronously with two sets of long edge-sealing rod teeth.

[0014] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, the inner surfaces of the long and short edge sleeves are provided with hot melt adhesive grooves, and solid adhesive sheets acting on the side of the flexible circuit board are placed in the hot melt adhesive grooves. The interiors of the long and short edge sleeves are provided with steam heating channels acting on the solid adhesive sheets. The ends of the long and short edge sleeves are provided with mutually fitting sealing surfaces. The center of the sealing surface is provided with a docking hole communicating with the steam heating channel. The two sets of long edge sleeves and the two sets of short edge sleeves are combined to form a rectangular edge-sealing unit.

[0015] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, wherein: a partition is provided in the steam heating channel of one set of the long edge sleeves; a first corrugated telescopic tube is installed on one side of the partition outside the long edge sleeves; a second corrugated telescopic tube is installed on the other side of the partition outside the long edge sleeves; a tank frame is provided below the edge-sealing fixture; a heating steam tank and a cold air tank are installed on the tank frame; the ends of the heating steam tank and the cold air tank are respectively provided with two sets of double-headed control valves connected to each other; an air inlet pipe is connected to the double-headed control valve; the air inlet pipe extends upward into the first opening slot and connects to the first corrugated telescopic tube; an exhaust pipe is connected to the second corrugated telescopic tube; the exhaust pipe extends outward through the first opening slot.

[0016] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, a processing fixture is provided on the right side of the upper end face of the fixture base, a second opening groove is provided on the upper end face of the processing fixture, a tooling shell is limited in the second opening groove, and four sets of circuit board positioning pins that interact with the elastic sealing rod are fixed in the tooling shell.

[0017] As a preferred embodiment of the PCB circuit board machine assembly fixture of the present invention, wherein: storage boxes are symmetrically riveted to the upper end face of the fixture base and on both sides of the material conveyor; a telescopic cylinder is horizontally installed at the end of the storage box away from the material conveyor; a telescopic cylinder rod is movably arranged inside the telescopic cylinder extending outward from the storage box; an inner limiting groove is opened inside the storage box for the telescopic cylinder rod to move; a wheel frame is fixed to the end of the telescopic cylinder rod; a flat wheel is rotatably arranged inside the wheel frame; and an outer storage groove is opened at the end of the storage box and communicates with the inner limiting groove, the outer storage groove being used to store the wheel frame and the flat wheel.

[0018] As a preferred embodiment of the PCB circuit board machine assembly fixture described in this invention, the following features are provided: both ends of the flattening wheel are connected by a hollow short shaft and a wheel frame; the outer periphery of the flattening wheel is wrapped with a flattening airbag that acts on the upper surface of the flexible circuit board; after inflation, the flattening airbag expands in volume and partially extends out of the wheel frame; both ends of the flattening airbag are connected by airbag locking sleeves and the sides of the flattening wheel, respectively; there are two sets of airbag locking sleeves; an inner wheel chamber is provided inside the flattening wheel; an air pump is fixed in the inner wheel chamber; the inflation tube of the air pump extends outward into the flattening airbag; the breathing tube of the air pump passes through one set of hollow short shafts and extends outward from the wheel frame; the inner wheel chamber is also provided with an L-shaped air outlet pipe; one end of the L-shaped air outlet pipe extends into the flattening airbag and a control valve is installed at the end; the other end of the L-shaped air outlet pipe passes through another set of hollow short shafts and extends outward from the wheel frame.

[0019] This invention provides a PCB circuit board machine assembly fixture with improvements that, compared to the prior art, have the following significant improvements and advantages: (1) The design of the elastic sealing rod is as follows: on the one hand, the downward movement of the suction cup locator causes the lower end of the elastic sealing rod to be sealed in the tool hole. The elastic sealing rod is pressed and slightly displaced upward to maintain the sealing force on the tool hole, so that the inside of the small suction cup is sealed, thereby assisting the suction work of the suction cup; on the other hand, the circuit board positioning pin is accurately inserted into the corresponding tool hole and the elastic sealing rod is moved out of the tool hole. During the upward movement of the elastic sealing rod, the sealing slider slides along the groove and the exhaust hole is exposed, allowing air to enter the small suction cup and the inner cavity. The small suction cup loses its suction effect and directly allows the lifting cylinder rod to drive the suction cup locator to return to the upward position. The small suction cup and the flexible circuit board are automatically separated, which has the function of automatic air intake separation.

[0020] (2) First, use four sets of suction cups to accurately grab the flexible circuit board. With the lifting and lowering of the suction cup positioner, and with the gap rotation of the grooved wheel structure, the flexible circuit board enters the first opening groove and is at the same level as the hot melt glue tank. On the other hand, the flexible circuit board enters the second opening groove. The four sets of circuit board positioning pins are accurately inserted into the corresponding tool holes to achieve the purpose of automatic and accurate positioning, saving time and effort and significantly improving work efficiency.

[0021] (3) First, let the high-temperature steam in the heating steam tank enter the steam heating channel through the air inlet pipe and the No. 1 corrugated expansion pipe, and after flowing through the circumferential gas flow channel for one round, it will be discharged outward through the exhaust pipe. The heat in the steam heating channel is conducted to the corresponding hot melt adhesive tank, which heats the solid adhesive film evenly to melt it. The heating uniformity is high. Then, let the cold air in the cold air tank enter the steam heating channel through the air inlet pipe and the No. 1 corrugated expansion pipe to cool and solidify the molten hot melt adhesive in the hot melt adhesive tank. The cooling efficiency is high.

[0022] (4) The four sets of moving rods are brought close to the flexible circuit board in a series of transmissions in the edge-sealing fixture. The two sets of long edge-sealing sleeves and the two sets of short edge-sealing sleeves are combined to form a rectangular edge-sealing unit. On the one hand, the edge of the flexible circuit board enters the corresponding hot melt adhesive tank and is bonded to the solid adhesive sheet, which facilitates subsequent hot melting and cooling. On the other hand, the adjacent sealing surfaces are sealed and bonded, and the adjacent docking holes are connected to open up the four sets of steam heating channels, forming a circumferential gas flow channel, which facilitates subsequent gas flow heating and cooling.

[0023] (5) Start the air pump and inflate the flattening airbag with the air tube so that the flattening airbag expands outward evenly and extends out of the wheel frame to contact the upper surface of the flexible circuit board below. Then, let the two sets of telescopic cylinder rods retract slowly and synchronously so that the two sets of flattening wheels move in opposite directions. The flattening airbag rolls along the upper surface of the flexible circuit board and uses the contact force to make the flexible circuit board fully unfolded, achieving the purpose of automatic flattening. In addition, the airbag has the function of flexibly protecting the circuit board. When the flattening airbag rolls to the edge of the flexible circuit board, it presses the edge of the flexible circuit board to assist the adsorption work of the small suction cup. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a PCB circuit board machine assembly fixture in one direction according to the present invention; Figure 2 This is a schematic diagram of the overall structure of a PCB circuit board machine assembly fixture from another direction according to the present invention; Figure 3 This is a schematic diagram of the specific structure of the horizontal cylinder seat of the present invention; Figure 4 This is a schematic diagram of the driving structure of the counterweight frustum of the present invention; Figure 5 This is a schematic diagram of the internal structure of the suction cup positioner of the present invention; Figure 6 This is a schematic diagram of the specific structure of the suction sleeve of the present invention; Figure 7 This is a schematic diagram of the specific structure of the elastic sealing rod of the present invention; Figure 8 This is a schematic diagram of the internal structure of the first opening groove of the present invention; Figure 9 This is a schematic diagram of the transmission structure in one direction inside the edge-binding fixture of the present invention; Figure 10 This is a schematic diagram of the transmission structure in another direction inside the edge-sealing fixture of the present invention; Figure 11 This is a schematic diagram of the external connection of the edge-binding sleeve of the present invention; Figure 12 This is a cross-sectional view of the edge-sealing sleeve of the present invention; Figure 13 This is a schematic diagram of the internal transmission structure of the mechanical housing of the present invention; Figure 14 This is a schematic diagram showing the installation position of the storage box in Embodiment 2 of the present invention; Figure 15 This is a schematic diagram of the external structure of the storage box of the present invention; Figure 16 This is a schematic diagram of the internal structure of the storage box of the present invention; Figure 17 This is a cross-sectional view of the leveling wheel of the present invention.

[0025] In the diagram: 1. Fixture base; 2. Material conveyor; 3. Chain plate; 4. First opening slot; 5. Second opening slot; 6. Tooling housing; 7. Circuit board positioning pin; 8. Flexible circuit board; 9. Horizontal baffle; 10. Circular limiting slot; 11. Counterweight frustum; 12. Limiting step; 13. Support shaft; 14. Damping bearing seat; 15. Quarter drive groove wheel; 16. Wheel groove; 17. Arc-shaped mating surface; 20. Servo motor No. 1 21. Drive plate; 22. Guide block; 23. Eccentric column; 30. Connecting column; 31. Horizontal cylinder seat; 32. Lifting cylinder; 33. Lifting cylinder rod; 34. Suction cup positioner; 40. Suction pump; 41. Four-hole connector; 42. Suction pipe; 43. Suction sleeve; 44. Riveting block; 45. Small suction cup; 46. Exhaust port; 47. Inner cavity; 50. Elastic sealing rod; 51. Limiting spring sleeve; 52. Spring 53. Spring; 60. Blocking slider; 61. Long edge sleeve; 62. Short edge sleeve; 63. Long edge L-shaped moving rod; 64. Long edge L-shaped moving rod; 65. Short edge L-shaped moving rod; 66. Guide rail groove; 67. Mechanical housing; 70. Servo motor No. 2; 71. Drive bevel gear; 72. First transmission bevel gear; 73. First rotating shaft; 74. First bearing seat; 75. First bidirectional gear; 76. 77. Second drive parachute wheel; 78. Second rotating shaft; 79. Second bearing seat; 80. Second double-direction gear; 81. Hot melt adhesive tank; 82. Steam heating channel; 83. Sealing surface; 84. Butt joint hole; 85. Partition plate; 86. No. 1 corrugated expansion tube; 97. No. 2 corrugated expansion tube; 98. Tank frame; 99. Heated steam tank; 90. Cold air tank; 91. Dual-head control valve; 92. Inlet pipe; 93. Exhaust pipe; 100. Storage box; 101. Telescopic cylinder; 102. Telescopic cylinder rod; 103. Inner limit groove; 104. Wheel frame; 105. Outer storage groove; 106. Flat wheel; 107. Hollow short shaft; 110. Airbag lock sleeve; 111. Flat airbag; 112. Inner wheel chamber; 113. Inflation pump; 114. Breathing tube; 115. Inflation tube; 116. L-shaped air outlet tube; 117. Control valve. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0027] like Figures 1-13As shown, this embodiment provides a PCB circuit board machine assembly fixture, including a fixture base 1. A circular limiting groove 10 is provided in the middle of the interior of the fixture base 1. A counterweight frustum 11 is rotatably arranged in the circular limiting groove 10. The counterweight frustum 11 serves as a counterweight and connection. A limiting slide step 12 is provided around the outer side of the counterweight frustum 11. An annular track for the movement of the limiting slide step 12 is provided in the circular limiting groove 10. A support shaft 13 is vertically connected to the middle of the bottom of the counterweight frustum 11. The lower end of the support shaft 13 is connected to the bottom of the fixture base 1 through a damping bearing seat 14. The damping bearing seat 14 provides a certain damping force to prevent the inertial movement of the support shaft 13. A quarter drive groove wheel 15 is sleeved on the support shaft 13. Four sets of wheel grooves 16 are symmetrically opened on the wheel surface of the quarter drive groove wheel 15. Four sets of arc-shaped contact surfaces 17 are also provided on the wheel surface of the quarter drive groove wheel 15, which are alternate with the wheel grooves 16.

[0028] A servo motor 20 is mounted on one side of the support shaft 13. A drive disk 21 is connected to the output shaft of the servo motor 20. A guide block 22 is fixed at the middle of the lower end face of the drive disk 21, which interacts with the arc-shaped contact surface 17. This guide block has a limiting and guiding function, effectively controlling the intermittent movement of the quarter-drive groove wheel 15. An eccentric column 23 that interacts with the wheel groove 16 is welded to the side of the lower end face of the drive disk 21. The two are of similar size. Figure 3 and Figure 4 As shown.

[0029] Furthermore, a connecting column 30 is vertically connected to the upper middle position of the counterweight frustum 11. A horizontal cylinder seat 31 is fixed to the upper end of the connecting column 30. A lifting cylinder 32 is vertically installed on the outer side of the upper end face of the horizontal cylinder seat 31. Figures 2-4 As shown.

[0030] Specifically, a lifting cylinder rod 33 is movably mounted inside the lifting cylinder 32, passing downward through the horizontal cylinder seat 31. A suction cup positioner 34 is connected to the lower end of the lifting cylinder rod 33. An air suction pump 40 is installed in the middle of the suction cup positioner 34. An air outlet is located at the lower end of the air suction pump 40. A four-hole connector 41 is installed at the air outlet of the air suction pump 40, and four sets of suction pipes 42 are installed on the four-hole connector 41. Figure 4 and Figure 5 As shown.

[0031] Each suction tube 42 has a suction sleeve 43 connected to its end. The upper end of the suction sleeve 43 is connected to the inner wall of the suction cup locator 34 via a rivet block 44. The lower end of the suction sleeve 43 is connected to a small suction cup 45, which acts around the tool hole corresponding to the flexible circuit board 8 (the bottom of the small suction cup 45 is sealed to the tool hole). An inner cavity 47 is formed extending downward through the interior of the suction sleeve 43, and an exhaust hole 46 communicating with the inner cavity 47 is formed on the outer side of the suction sleeve 43. Figure 5 and Figure 6 As shown.

[0032] In this embodiment, an elastic sealing rod 50 is movably disposed in the middle of the inner cavity 47. The lower end of the elastic sealing rod 50 acts on the tool hole, and a limiting spring sleeve 51 is installed on the upper end of the elastic sealing rod 50. A spring 52 fixed to the riveting block 44 is disposed inside the limiting spring sleeve 51. When the spring 52 is compressed, it generates an elastic force that drives the elastic sealing rod 50 to move downward. A sliding groove is provided on the cavity wall of the inner cavity 47. A sealing slider 53 that moves in the sliding groove is fixed on the outer side of the elastic sealing rod 50. The sealing slider 53 acts on the exhaust hole 46. The lower end of the elastic sealing rod 50 in its natural state extends out of the small suction cup 45, and the sealing slider 53 is located on the exhaust hole 46. Figures 5-7 As shown.

[0033] Furthermore, a material conveyor 2 is installed at the front position of the upper end face of the fixture 1. The material conveyor 2 extends horizontally outside the fixture 1. The material conveyor 2 includes a ring-moving chain plate 3 and limiting side baffles. The two sets of limiting side baffles are symmetrically distributed. A flexible circuit board 8 is placed on the chain plate 3 facing forward. A transverse baffle 9 is installed at the end of the material conveyor 2, which acts on the flexible circuit board 8. The transverse baffle 9 serves to block and position the circuit board 8. Figure 1 and Figure 2 As shown.

[0034] Furthermore, an edge-binding fixture is provided on the upper left side of the fixture base 1. The top of the edge-binding fixture has a first opening slot 4. Two sets of long edge-binding sleeves 60 and two sets of short edge-binding sleeves 61 are symmetrically distributed inside the first opening slot 4. The dimensions of the long edge-binding sleeves 60 and the short edge-binding sleeves 61 are determined according to the dimensions of the flexible circuit board 8. Figure 1 and Figure 8 As shown.

[0035] Each set of long edging sleeves 60 has a long edging L-shaped moving rod 62 connected to its lower end, and the bottom side of the long edging L-shaped moving rod 62 is provided with long edging rod teeth 63. Each set of short edging sleeves 61 has a short edging L-shaped moving rod 64 connected to its lower end, and the bottom side of the short edging L-shaped moving rod 64 is provided with short edging rod teeth 65. The bottom of the first opening slot 4 is respectively provided with guide rail grooves 66 for the movement of the long edging L-shaped moving rod 62 and the short edging L-shaped moving rod 64. The guide rail grooves 66 serve a limiting and guiding function. Figures 8-10 As shown.

[0036] The edge-binding fixture has a mechanical housing 67 riveted to its center. A second servo motor 70 is horizontally mounted inside the mechanical housing 67. A drive bevel gear 71 is sleeved on the output end of the second servo motor 70. A first transmission bevel gear 72 and a second transmission bevel wheel 76 are respectively meshed on the drive bevel gear 71. Figure 10 and Figure 13 As shown.

[0037] In this embodiment, the first transmission bevel gear 72 is sleeved on the lower end of the first rotating shaft 73. The first rotating shaft 73 passes upward through the top of the mechanical housing 67. The first rotating shaft 73 is connected to the inner wall of the edge-sealing fixture through the first bearing seat 74. A first bidirectional gear 75 is sleeved on the first rotating shaft 73. The first bidirectional gear 75 and two sets of short edge-sealing rod teeth 65 mesh synchronously, such as... Figure 9 , Figure 10 and Figure 13 As shown.

[0038] In this embodiment, the second transmission parachute wheel 76 is sleeved on the upper end of the second rotating shaft 77. The second rotating shaft 77 passes downward through the bottom of the mechanical housing 67. The second rotating shaft 77 is connected to the inner wall of the edge-sealing fixture through the second bearing seat 78. A second bidirectional gear 79 is sleeved on the second rotating shaft 77. The second bidirectional gear 79 and two sets of long edge-sealing rod teeth 63 mesh synchronously. The size and gear ratio of the first bidirectional gear 75 and the second bidirectional gear 79 are determined according to the actual situation. Figure 9 , Figure 10 and Figure 13 As shown.

[0039] Furthermore, both the long edge sleeve 60 and the short edge sleeve 61 have hot melt adhesive grooves 80 on their inner surfaces. Solid adhesive sheets acting on the sides of the flexible circuit board 8 are placed in the hot melt adhesive grooves 80. The substrate and cover film of the FPC are bonded together by adhesive bonding. Under repeated bending or external force, the edges are most prone to delamination (lifting) and tearing. The edge adhesive can firmly bond the layers together, significantly improving the mechanical strength of the edges. Figure 11 and Figure 12 As shown.

[0040] Both the long edge sleeve 60 and the short edge sleeve 61 have internal steam heating channels 81 that act on the solid film. The ends of both the long edge sleeve 60 and the short edge sleeve 61 have mutually fitting sealing surfaces 82. A connecting hole 83, communicating with the steam heating channel 81, is provided in the center of the sealing surface 82. The two sets of long edge sleeves 60 and the two sets of short edge sleeves 61, when combined, form a rectangular edge unit, such as... Figure 11 and Figure 12 As shown.

[0041] Furthermore, a baffle 84 is provided inside the steam heating channel 81 of one set of long edging sleeves 60. The baffle 84 serves as a separator to facilitate unidirectional gas flow. A first corrugated expansion tube 85 is installed on the outside of the long edging sleeve 60 and on one side of the baffle 84, and a second corrugated expansion tube 86 is installed on the outside of the long edging sleeve 60 and on the other side of the baffle 84. The first corrugated expansion tube 85 and the second corrugated expansion tube 86 have telescopic and restoring properties, and can extend and retract with the movement of the long edging sleeve 60. Figure 11and Figure 12 As shown.

[0042] In this embodiment, a tank frame 90 is provided below the edge-sealing fixture. A heating steam tank 91 and a cold air tank 92 are installed on the tank frame 90. The ends of the heating steam tank 91 and the cold air tank 92 are respectively provided with two sets of double-headed control valves 93 connected to each other. An air inlet pipe 94 is connected to the double-headed control valve 93. The air inlet pipe 94 extends upward into the first opening slot 4 and connects to the first corrugated telescopic pipe 85. An exhaust pipe 95 is connected to the second corrugated telescopic pipe 86. The exhaust pipe 95 extends outward through the first opening slot 4, such as... Figure 1 and Figure 8 As shown.

[0043] Furthermore, a processing fixture is provided on the upper right side of the fixture base 1. A second opening groove 5 is formed on the upper surface of the processing fixture. A tooling shell 6 (which can be an electrical housing or a testing fixture, etc., and can be replaced depending on the processing technology) is provided within the second opening groove 5. Four sets of circuit board positioning pins 7, which interact with the elastic sealing rod 50, are fixed inside the tooling shell 6. Figure 2 As shown.

[0044] In this embodiment, the flexible circuit board 8 to be processed is first placed on the chain plate 3 via a transfer mechanism (the two sides of the flexible circuit board 8 are aligned with the side baffles). The flexible circuit board 8 moves backward in a straight line with the chain plate 3 until it is blocked by the horizontal baffle 9. At this time, the flexible circuit board 8 is directly below the suction cup positioner 34. The lifting cylinder 32 is activated, and the lifting cylinder rod 33 extends downward, driving the suction cup positioner 34 to move downward until the four sets of small suction cups 45 cover the edge tool holes of the flexible circuit board 8, while the elastic... The lower end of the sealing rod 50 is sealed inside the tool hole (the elastic sealing rod 50 is slightly displaced upward under pressure to maintain the sealing force on the tool hole), so that the inside of the small suction cup 45 is sealed. Then the suction pump 40 is started, and the gas in the corresponding small suction cup 45 and the inner cavity 47 is drawn by the four sets of suction pipes 42 respectively, thereby forming a negative pressure state. The pressure difference between the inside and outside causes the four sets of small suction cups 45 to stick to the flexible circuit board 8. Then the lifting cylinder rod 33 is returned to the upward position, and the suction cup positioner 34 lifts the flexible circuit board 8 and moves it upward out of the material conveyor 2.

[0045] Start the first servo motor 20, which drives the drive disk 21 to rotate one revolution. During the circular motion, the eccentric column 23 on the drive disk 21 enters the adjacent set of wheel grooves 16. The two generate a relative squeezing force, causing the entire quarter drive groove wheel 15 to rotate 90°. This causes the connecting column 30 to rotate through the connection relationship. The horizontal cylinder seat 31 drives the suction cup positioner 34 and the flexible circuit board 8 to move directly above the edge-sealing fixture, allowing the lifting cylinder rod 33 to extend downwards and drive the suction cup positioner 34 to move downwards, so that the flexible circuit board 8 enters the first opening groove 4 and is at the same horizontal height as the hot melt adhesive tank 80.

[0046] The second servo motor 70 is started, driving the bevel gear 71 to rotate. Through meshing, the first transmission bevel gear 72 rotates clockwise, and the second transmission parachute wheel 76 moves counterclockwise. When the first transmission bevel gear 72 rotates clockwise, the first bidirectional gear 75, coaxial with it, also rotates clockwise. The first bidirectional gear 75 synchronously acts on the two sets of short edge-binding rod teeth 65, pulling the two sets of short edge-binding L-moving rods 64 towards each other (the short edge-binding L-moving rods 64 move along the guide rail groove 66). When the second transmission parachute wheel 76 moves counterclockwise, the second bidirectional gear 79, coaxial with it, also moves counterclockwise. The second bidirectional gear 79 acts synchronously on the two sets of long edge-wrapping rod teeth 63, pulling the two sets of long edge-wrapping L moving rods 62 to move towards each other (the long edge-wrapping L moving rods 62 move along the guide rail groove 66). The four sets of moving rods synchronously approach the flexible circuit board 8 until the edge of the flexible circuit board 8 enters the corresponding hot melt adhesive groove 80 and is bonded to the solid adhesive sheet. At this time, the two sets of long edge-wrapping sleeves 60 and the two sets of short edge-wrapping sleeves 61 merge to form a rectangular edge-wrapping unit. The adjacent sealing surfaces 82 are sealed and bonded, and the adjacent docking holes 83 are docked to open up the four sets of steam heating channels 81, forming a circumferential gas flow channel.

[0047] First, open one end of the dual-head control valve 93 to allow the high-temperature steam in the heating steam tank 91 to flow into the steam heating channel 81 through the air inlet pipe 94 and the first corrugated telescopic pipe 85. After flowing through the circumferential gas flow channel once, the steam is discharged outward through the exhaust pipe 95. The heat in the steam heating channel 81 is conducted to the corresponding hot melt adhesive tank 80, which heats the solid adhesive sheet evenly and melts it into hot melt adhesive, which fully fills the gaps between the layers on the edge of the flexible circuit board 8. Then, open the other end of the dual-head control valve 93 to allow the cold air in the cold air tank 92 to flow into the steam heating channel 81 through the air inlet pipe 94 and the first corrugated telescopic pipe 85. While absorbing the heat in the channel, the cold air cools and solidifies the molten hot melt adhesive in the hot melt adhesive tank 80, forming a strong and regular protective layer around the outer side of the flexible circuit board 8.

[0048] Then, through transmission, the two sets of long edge sleeves 60 and the two sets of short edge sleeves 61 are returned to their original positions, the lifting cylinder rod 33 returns to its original position, the suction cup locator 34 lifts the flexible circuit board 8 and moves it upward out of the first opening slot 4, and then through transmission, the connecting column 30 is rotated, the horizontal cylinder seat 31 drives the suction cup locator 34 and the flexible circuit board 8 to move to the rear position of the fixture seat 1, and the flexible circuit board 8 can be removed.

[0049] When the flexible circuit board 8 needs to be installed, surface-mounted, or functionally tested, the tooling housing 6 used in the above processes is first placed into the second opening slot 5. Multiple sets of limiting blocks are used to position the tooling housing 6, ensuring the four sets of circuit board positioning pins 7 are centered in the second opening slot 5. Then, the connecting column 30 is rotated via transmission, and the horizontal cylinder seat 31 drives the suction cup positioner 34 and the flexible circuit board 8 towards the processing fixture position, positioning the suction cup positioner 34 directly above the four sets of circuit board positioning pins 7. Next, the lifting cylinder rod 33 extends downwards, driving the suction cup positioner 34 downwards, allowing the flexible circuit board 8 to enter the second opening slot 5. Inside the opening groove 5, until the four sets of circuit board positioning pins 7 simultaneously contact the corresponding elastic sealing rods 50, the elastic sealing rods 50 are squeezed upwards, the circuit board positioning pins 7 are precisely inserted into the corresponding tool holes, and the elastic sealing rods 50 are moved out of the tool holes (the springs 52 are compressed). During the upward displacement of the elastic sealing rods 50, the sealing sliders 53 slide along the groove, exposing the exhaust holes 46, allowing air to enter the small suction cups 45 and the inner cavity 47. The small suction cups 45 lose their suction effect, and the lifting cylinder rod 33 directly drives the suction cup positioner 34 to return to its original position. The small suction cups 45 and the flexible circuit board 8 automatically separate, completing the positioning and installation. Example 2

[0050] Based on Embodiment 1, because the flexible circuit board 8 has a certain degree of softness and flexibility, it is prone to local bulges and wrinkles when placed on the chain plate 3, causing unevenness and interfering with subsequent precise grasping. To solve the above technical problems, we have the following design, such as... Figures 14-17 As shown.

[0051] Specifically, storage boxes 100 are symmetrically riveted to the upper end face of the fixture base 1 and on both sides of the material conveyor 2. A telescopic cylinder 101 is horizontally mounted at the end of the storage box 100 away from the material conveyor 2. A telescopic cylinder rod 102 extends movably from the inside of the telescopic cylinder 101 outwards from the storage box 100. An inner limiting groove 103 is provided inside the storage box 100 to allow the telescopic cylinder rod 102 to move, serving as a limiting and guiding function. Figure 14 and Figure 15 As shown.

[0052] The telescopic cylinder rod 102 has a wheel frame 104 fixed to its end. A flattening wheel 106 is rotatably mounted inside the wheel frame 104. The storage box 100 has an outer storage groove 105 at its end, which communicates with the inner limiting groove 103. The outer storage groove 105 is used to store the wheel frame 104 and the flattening wheel 106. Figure 16 and Figure 17 As shown.

[0053] In this embodiment, both ends of the leveling wheel 106 are connected by a hollow short shaft 107 and a wheel frame 104. The outer periphery of the leveling wheel 106 is wrapped with a leveling airbag 111 that acts on the upper surface of the flexible circuit board 8. The leveling airbag 111 has a ring structure and its outer surface has a certain frictional property. After inflation, the leveling airbag 111 expands in volume and partially extends out of the wheel frame 104. Both ends of the leveling airbag 111 are connected by an airbag locking sleeve 110 and the side of the leveling wheel 106, respectively. Figure 16 and Figure 17 As shown.

[0054] The leveling wheel 106 has an inner wheel chamber 112, in which an air pump 113 is fixed. The air pump 113's inflation tube 115 extends outward into the leveling airbag 111. The air pump 113's breathing tube 114 passes through one set of hollow short shafts 107 and extends outward into the wheel frame 104. The breathing tube 114 is used to absorb outside air, such as... Figure 16 and Figure 17 As shown.

[0055] The inner wheel chamber 112 is also equipped with an L-shaped air outlet pipe 116. One end of the L-shaped air outlet pipe 116 extends into the flat airbag 111 and is fitted with a control valve 117 at the end. Opening the control valve 117 releases the air inside the flat airbag 111, which is then discharged outward through the L-shaped air outlet pipe 116. The other end of the L-shaped air outlet pipe 116 passes through another set of hollow short shafts 107 and extends outward toward the wheel frame 104. Figure 16 and Figure 17 As shown.

[0056] In this embodiment, when the flexible circuit board 8 is blocked by the horizontal baffle 9 and is directly below the suction cup positioner 34, the telescopic cylinder rods 102 on the two sets of telescopic cylinders 101 extend synchronously, driving the wheel frame 104 and the leveling wheel 106 to move to the upper middle part of the flexible circuit board 8. Then, the air pump 113 is started, and air is inflated into the leveling airbag 111 through the air inflator 115, causing the leveling airbag 111 to expand evenly outward, partially extending out of the wheel frame 104 and contacting the upper surface of the flexible circuit board 8 below. Then, the two sets of telescopic cylinder rods 102 retract synchronously and slowly, causing the two sets of leveling wheels 106 to move in opposite directions (from the flexible circuit...). The flexible circuit board 8 moves from the middle to both sides. The flat airbags 111 roll along the upper surface of the flexible circuit board 8 and use the contact force to make the flexible circuit board 8 fully stretch (the two sets of flat airbags 111 work synchronously to make the overall force of the flexible circuit board 8 uniform and not biased). The flat airbags 111 roll to the edge of the flexible circuit board 8 and press the edge of the flexible circuit board 8. Then, the four sets of small suction cups 45 are used to adsorb the flexible circuit board 8. Then, the wheel frame 104 and the flat wheel 106 leave the flexible circuit board 8 and return to the outer storage slot 105. Then, the four sets of small suction cups 45 are used to lift the flexible circuit board 8 upward.

[0057] All structural components disclosed in the embodiments need to be adjusted in size and shape according to the actual installation environment, and are not limited to the styles disclosed in the drawings. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A PCB circuit board machine assembly fixture, comprising a fixture base (1), characterized in that: A circular limiting groove (10) is provided in the middle of the fixture seat (1). A counterweight frustum (11) is rotatably arranged in the circular limiting groove (10). A connecting column (30) is vertically connected to the middle of the upper end of the counterweight frustum (11). A horizontal cylinder seat (31) is fixed to the upper end of the connecting column (30). A lifting cylinder (32) is vertically installed on the outer side of the upper end face of the horizontal cylinder seat (31). A lifting cylinder rod (33) is movably arranged inside the lifting cylinder (32) through the horizontal cylinder seat (31). A suction cup locator (34) is connected to the lower end of the lifting cylinder rod (33). An air pump (40) is installed in the middle of the inside of the suction cup locator (34). A four-hole connector (41) is installed at the air inlet of the air pump (40). Four sets of suction pipes (42) are installed on the four-hole connector (41). Each suction tube (42) is connected to a suction sleeve (43) at its end. The upper end of the suction sleeve (43) is connected to the inner wall of the suction cup locator (34) via a rivet block (44). The lower end of the suction sleeve (43) is connected to a small suction cup (45). The small suction cup (45) acts on the periphery of the tool hole corresponding to the flexible circuit board (8). The suction sleeve (43) has an inner cavity (47) that extends downward through its interior. The outer side of the suction sleeve (43) has an exhaust hole (46) that communicates with the inner cavity (47). An elastic sealing rod (50) is movably disposed in the middle of the inner cavity (47). The lower end of the elastic sealing rod (50) acts on the tool hole. A limiting spring sleeve (51) is installed on the upper end of the elastic sealing rod (50). A spring (52) fixed to the riveting block (44) is disposed inside the limiting spring sleeve (51). A sliding groove is provided on the cavity wall of the inner cavity (47). A sealing slider (53) that moves in the sliding groove is fixed on the outer side of the elastic sealing rod (50). The sealing slider (53) acts on the exhaust hole (46).

2. The PCB circuit board machine assembly fixture according to claim 1, characterized in that: A support shaft (13) is vertically connected at the bottom center of the counterweight truncated cone (11). The lower end of the support shaft (13) is connected to the bottom of the fixture seat (1) through a damping bearing seat (14). A quarter drive groove wheel (15) is sleeved on the support shaft (13). Four sets of wheel grooves (16) are symmetrically opened on the wheel surface of the quarter drive groove wheel (15). Four sets of arc-shaped contact surfaces (17) are also provided on the wheel surface of the quarter drive groove wheel (15) and are alternate with the wheel grooves (16). A servo motor (20) is installed on one side of the support shaft (13). A drive disk (21) is connected to the output shaft of the servo motor (20). A guide block (22) that interacts with the arc-shaped contact surface (17) is fixed at the middle position of the lower end face of the drive disk (21). An eccentric column (23) that interacts with the wheel groove (16) is welded to the side of the lower end face of the drive disk (21).

3. The PCB circuit board machine assembly fixture according to claim 1, characterized in that: A material conveyor (2) is installed at the front position of the upper end face of the fixture seat (1). The material conveyor (2) extends horizontally out of the fixture seat (1). The material conveyor (2) includes a chain plate (3) with circular motion and a limiting side baffle. The two sets of limiting side baffles are symmetrically distributed. A flexible circuit board (8) is placed on the chain plate (3) facing forward. A horizontal baffle (9) acting on the flexible circuit board (8) is installed at the end of the material conveyor (2).

4. The PCB circuit board machine assembly fixture according to claim 1, characterized in that: A binding fixture is provided on the upper left side of the fixture seat (1). The top of the binding fixture is provided with a first opening groove (4). Two sets of long binding sleeves (60) and two sets of short binding sleeves (61) are symmetrically distributed inside the first opening groove (4). The lower end of each set of long binding sleeves (60) is connected to a long binding L moving rod (62). The bottom side of the long binding L moving rod (62) is provided with long binding rod teeth (63). The lower end of each set of short binding sleeves (61) is connected to a short binding L moving rod (64). The bottom side of the short binding L moving rod (64) is provided with short binding rod teeth (65). The bottom of the first opening groove (4) is provided with guide rail grooves (66) for the long binding L moving rod (62) and the short binding L moving rod (64) to move.

5. A PCB circuit board machine assembly fixture according to claim 4, characterized in that: A mechanical housing (67) is riveted to the middle of the inner part of the edge-binding fixture. A second servo motor (70) is horizontally mounted inside the mechanical housing (67). A drive bevel gear (71) is sleeved on the output end of the second servo motor (70). A first transmission bevel gear (72) and a second transmission bevel gear (76) are respectively meshed on the drive bevel gear (71). The first transmission bevel gear (72) is sleeved on the lower end of the first rotating shaft (73). The first rotating shaft (73) passes upward through the mechanical housing. At the top of the body (67), a first bidirectional gear (75) is sleeved on the first rotating shaft (73). The first bidirectional gear (75) and two sets of short edge rod teeth (65) mesh synchronously. The second transmission parachute wheel (76) is sleeved on the upper end of the second rotating shaft (77). The second rotating shaft (77) passes downward through the bottom of the mechanical housing (67). A second bidirectional gear (79) is sleeved on the second rotating shaft (77). The second bidirectional gear (79) and two sets of long edge rod teeth (63) mesh synchronously.

6. A PCB circuit board machine assembly fixture according to claim 5, characterized in that: The inner surfaces of the long edge sleeve (60) and the short edge sleeve (61) are provided with hot melt adhesive grooves (80). The hot melt adhesive grooves (80) contain solid adhesive sheets that act on the side of the flexible circuit board (8). The interior of the long edge sleeve (60) and the short edge sleeve (61) is provided with steam heating channels (81) that act on the solid adhesive sheets. The ends of the long edge sleeve (60) and the short edge sleeve (61) are provided with mutually fitting sealing surfaces (82). The middle of the sealing surface (821) is provided with a connecting hole (83) that communicates with the steam heating channel (81). The two sets of long edge sleeves (60) and the two sets of short edge sleeves (61) are combined to form a rectangular edge unit.

7. A PCB circuit board machine assembly fixture according to claim 6, characterized in that: A partition (84) is provided inside the steam heating channel (81) of one set of the long edging sleeves (60). A first corrugated expansion tube (85) is installed on the outside of the long edging sleeves (60) and on one side of the partition (84). A second corrugated expansion tube (86) is installed on the outside of the long edging sleeves (60) and on the other side of the partition (84). A tank frame (90) is provided below the edging fixture. A heating steam tank (91) and a cold air tank (92) are installed on the tank frame (90). 2) The ends of the heating steam tank (91) and the cold air tank (92) are provided with two sets of double-headed control valves (93) respectively connected to two sets. The double-headed control valves (93) are connected to an air inlet pipe (94). The air inlet pipe (94) extends upward into the first opening groove (4) and is connected to the first corrugated telescopic pipe (85). The second corrugated telescopic pipe (86) is connected to an exhaust pipe (95). The exhaust pipe (95) extends outward through the first opening groove (4).

8. A PCB circuit board machine assembly fixture according to claim 1, characterized in that: A processing fixture is provided on the upper end face of the fixture base (1) at the right position. A second opening groove (5) is provided on the upper end face of the processing fixture. A tooling shell (6) is provided in the second opening groove (5). Four sets of circuit board positioning pins (7) that interact with the elastic sealing rod (50) are fixed in the tooling shell (6).

9. A PCB circuit board machine assembly fixture according to claim 3, characterized in that: A storage box (100) is symmetrically riveted to the upper end face of the fixture base (1) and on both sides of the material conveyor (2). A telescopic cylinder (101) is horizontally installed at the end of the storage box (100) away from the material conveyor (2). A telescopic cylinder rod (102) is movably arranged inside the telescopic cylinder (101) extending outward from the storage box (100). An inner limiting groove (103) for the telescopic cylinder rod (102) to move is opened inside the storage box (100). A wheel frame (104) is fixed at the end of the telescopic cylinder rod (102). A flat wheel (106) is rotatably arranged inside the wheel frame (104). An outer storage groove (105) communicating with the inner limiting groove (103) is opened at the end of the storage box (100). The outer storage groove (105) is used to store the wheel frame (104) and the flat wheel (106).

10. A PCB circuit board machine assembly fixture according to claim 9, characterized in that: Both ends of the leveling wheel (106) are connected by a hollow short shaft (107) and a wheel frame (104). The outer periphery of the leveling wheel (106) is wrapped with a leveling airbag (111) that acts on the upper surface of the flexible circuit board (8). After the leveling airbag (111) is inflated, its volume expands and it extends out of the wheel frame (104). Both ends of the leveling airbag (111) are connected to the side of the leveling wheel (106) by an airbag lock sleeve (110). The smoothing wheel (106) has an inner wheel chamber (112) inside. An air pump (113) is fixed in the inner wheel chamber (112). The air pump (113)’s air pipe (115) extends outward into the smoothing airbag (111). The air pump (113)’s breathing pipe (114) passes through one of the hollow short shafts (107) and extends outward into the wheel frame (104). The inner wheel chamber (112) is also provided with an L-shaped air outlet pipe (116). One end of the L-shaped air outlet pipe (116) extends into the smoothing airbag (111) and a control valve (117) is installed at the end. The other end of the L-shaped air outlet pipe (116) passes through another set of hollow short shafts (107) and extends outward into the wheel frame (104).

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