Circuit board automatic surface mounting equipment and surface mounting process thereof

Abstract

The invention discloses circuit board automatic surface mounting equipment and a surface mounting process thereof, and relates to the technical field of circuit board processing equipment. Comprising a supporting frame, a conveying assembly is arranged on the side face of the supporting frame, a patch welding assembly is arranged above the conveying assembly, a connecting groove is formed in the side face of the supporting frame, a sleeve is fixedly connected to the lower end of the supporting frame, the supporting frame is slidably connected with a bottom support through the sleeve, and a sliding assembly or an anti-skid pad is embedded in the bottom of the bottom support; the supporting frame, the bottom support, the conveying assembly and the patch welding assembly are combined and connected, so that the detachable automatic patch equipment is formed, the patch equipment is flexibly formed through disassembly, assembly and replacement of several main structures, the equipment is convenient to disassemble, carry and store, all parts of the equipment are convenient to replace, and the cost is reduced. The assembled equipment can meet the requirements of various different circuit boards and circuit board elements, and the use flexibility of the circuit board surface mounting equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board processing equipment, and in particular to a circuit board automatic patch equipment and a patch process thereof. Background Art

[0002] Circuit board patch refers to a series of process flows based on PCB, referred to as SMT patch. SMT is surface mount technology (surface mount technology), which is the most popular technology and process in the current electronic assembly industry. Electronic circuit surface assembly technology is called surface mount or surface mounting technology. It is a circuit assembly technology that mounts pinless or short-lead surface mount components on the surface of a printed circuit board or other substrate, and assembles them by soldering through reflow soldering or dip soldering.

[0003] In the prior art, most of the automated circuit board placement equipment adopts an integrated structure, which is inconvenient to disassemble and carry, and a circuit board positioning structure is usually set on the equipment platform. These positioning structures are usually made of hard materials, and the circuit boards are fixed by mortise and tenon joints and other structures. These structures are repeatedly opened and closed during the processing process, which is easy to cause wear and tear, resulting in loose positioning. Summary of the invention

[0004] The invention provides a circuit board automatic patch device and a patch process thereof to solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a circuit board automatic patch equipment, comprising a support frame, a conveying assembly is arranged on the side of the support frame, and a patch welding assembly is arranged above the conveying assembly;

[0006] A connecting groove is provided on the side of the support frame, a sleeve is fixedly connected to the lower end of the support frame, the support frame is slidably connected to the bottom bracket through the sleeve, a sliding component or an anti-slip pad is nested at the bottom of the bottom bracket, a universal wheel is provided at the bottom of the sliding component, and the front and rear ends of the sliding component are rotatably connected to the bottom bracket, a sliding groove is provided on the top of the support frame, and a positioning baffle is provided on the side of the sliding groove;

[0007] The left and right ends of the conveying assembly are fixedly connected with connecting plates, the front end of the conveying assembly is fixedly connected with a handle, the inside of the conveying assembly is fixedly installed with a driving motor, the middle of the conveying assembly is fixedly connected with a connecting rod, the inner side of the conveying assembly is rotatably connected with a support rod and a guide rod, the outer side of the guide rod is transmission-connected with a conveyor belt, and the surface of the conveyor belt is fixedly installed with a circuit board positioning strip;

[0008] Both ends of the patch welding assembly are fixedly connected with sliding brackets, the bottom of the sliding bracket is provided with rollers, a linear motor is fixedly installed on the side of the sliding bracket, the movable end of the linear motor is fixedly connected with a positioning block, the middle of the patch welding assembly is slidably connected with a chassis, positioning bolts are provided on both sides of the chassis, a limiting groove is provided on the upper surface of the patch welding assembly, a first electric cylinder and a second electric cylinder are fixedly installed inside the chassis, a mechanical claw is fixedly installed at the lower end of the first electric cylinder, a swing motor is fixedly installed at the bottom of the second electric cylinder, a telescopic arm is provided at the output end of the swing motor, and an electric welding head is fixedly installed at one end of the telescopic arm away from the swing motor.

[0009] Furthermore, the connecting grooves are symmetrically opened on opposite sides of the upper end of the support frame, the connecting grooves and the connecting plates are arranged one by one, the cross-section of the connecting plate is L-shaped, and the conveying assembly is slidably connected to the upper end of the support frame through the connecting plate and the connecting groove and is fixed by bolts.

[0010] Furthermore, the bottom support is U-shaped and its width is greater than the width of the sliding component. The inner side of the bottom support is provided with an outer protrusion, and two outer protrusions are symmetrically provided on the left and right. An anti-slip cover is attached to the outer side of the bottom support. When the bottom support is swung to the front and rear sides of the sliding component, it is fixed by a magnetic buckle.

[0011] Furthermore, a guide wheel is coaxially arranged on the guide rod, and the guide wheels are evenly arranged on the guide rod at equal intervals. The conveyor belt fits tightly to the outside of the guide wheel. The guide rod is symmetrically arranged at the front and rear ends of the conveying assembly. The output end of the drive motor and one of the support rods are fitted to the inner side of the conveyor belt and are evenly arranged at equal intervals.

[0012] Furthermore, positioning holes are provided at equal intervals on the surface of the conveyor belt, and the positioning holes are arranged in two rows on the surface of the conveyor belt. Two connecting bolts are threadedly connected to the circuit board positioning strip, and the spacing between the two connecting bolts is the same as the spacing between the two rows of positioning holes. A metal frame is embedded on the outside of the circuit board positioning strip, and the connecting bolts penetrate the circuit board positioning strip, the metal frame and the positioning holes and are threadedly connected with nuts. The circuit board positioning strip is made of rubber material, and circuit board positioning grooves are provided on the front and rear sides of the circuit board positioning strip, and the above-mentioned circuit board positioning grooves and their side walls are both protruding from the metal frame.

[0013] Furthermore, the lower end of the sliding bracket extends and is set inside the slide groove, the roller is rollingly set on the lower inner wall of the slide groove, the lower surface of the positioning block is provided with a slot for the positioning baffle, the positioning baffle is embedded in the positioning block through the slot, and the linear motor is set along the slide groove.

[0014] Furthermore, a metal pad is attached to the surface of the limiting groove, ridges are arranged at equal intervals on the upper surface of the metal pad, the lower end of the positioning bolt is tightly attached to the metal pad, and scale lines are arranged on the surface of the metal pad.

[0015] Furthermore, the chassis is arranged based on a PLC controller, the linear motor, the first electric cylinder, the second electric cylinder, the swing motor, the telescopic arm and the welding head are all electrically connected to the PLC controller, the drive motor is connected to the wires through a joint interface structure and is electrically connected to the PLC controller in the chassis, and the telescopic arm is arranged based on an electric telescopic rod.

[0016] A chip placement process of a circuit board automatic chip placement device comprises the following steps:

[0017] S1. Selection and assembly preparation of conveyor components: According to the spacing between the positioning holes on the conveyor belt, the conveyor components are provided with various specifications. According to the width of the circuit board to be processed and the size of the selected circuit board positioning strip, the conveyor belt with appropriate specifications is selected, and the circuit board positioning strips are fitted one by one on the side-by-side positioning holes. Connecting bolts are bolted into the circuit board positioning strips. The connecting bolts pass through the circuit board positioning strips themselves, the metal frame and the positioning holes. The nuts are threaded from the back of the conveyor belt to the connecting bolts to complete the preparation of the conveyor components;

[0018] S2. Assembly installation of the support frame: According to the processing scenario, choose to install a sliding component or an anti-skid pad at the bottom of the support frame, nest the bottom bracket on the upper surface of the sliding component or the anti-skid pad, set up the support frame above the bottom bracket, insert the column at the upper end of the bottom bracket into the sleeve, adjust the height of the support frame and then bolt it in to fix it;

[0019] S3. Assembly installation of equipment: Place the conveying assembly in front of the support frame, make the connecting plate face the connecting slot, push the conveying assembly into the inner side of the support frame, make the connecting plate completely slide into the connecting slot, and fix it by bolting in the side of the support frame. Set up the SMD welding assembly on the top of the support frame from above. During the setting process, the positioning block is buckled on the top of the positioning baffle, so that the positioning baffle is inserted into the slot, and the roller is placed in the slide slot to complete the setting of the SMD welding assembly. Adjust the position of the chassis left and right so that the chassis is directly above the center line of the conveyor belt, screw in the positioning bolts so that they fit tightly with the limit slot, and position the chassis.

[0020] S4, loading and pre-processing: insert the circuit board to be mounted from the side between two adjacent circuit board positioning strips at the rear end of the conveying assembly, and slide the front and rear edges of the circuit board into the circuit board positioning grooves on the adjacent circuit board positioning strips. The inner wall of the circuit board positioning groove fits tightly with the circuit board under the elastic action of the rubber material. Bend a concave surface at each pin of the circuit element to be processed by needle-nosed pliers, cut a section from the end of the solder wire, the length of the cut solder wire is not more than twice the width of the pin, and the cut solder wire is embedded in the above concave surface to complete the pre-processing of the circuit board components. Place the circuit element to be processed on the inner side of the mechanical claw, and the mechanical claw grasps the circuit board component;

[0021] S5, patch: the drive motor drives the guide rod to rotate, drives the conveyor belt to run, drives the patch to be patched to move forward to the bottom of the chassis, the first electric cylinder extends, drives the mechanical claw to move down, places the circuit board components to the circuit board to be patched area, and after the mechanical claw is released, the first electric cylinder contracts, and passes new circuit board components to the inside of the mechanical claw. The mechanical claw retracts and grabs the circuit board components. At this time, the second electric cylinder extends, cooperates with the swing motor and the telescopic arm to adjust the position of the electric welding head, so that the electric welding head is against the solder wire embedded in the pin of the circuit board component to be welded, and the solder wire is heated by the electric welding head to melt it into a droplet shape. The droplets formed by the melted solder wire overflow to the tin soldering point of the circuit board, and then the second electric cylinder retracts. After the electric welding head moves to the position facing another pin under the action of the swing motor and the telescopic arm, the second electric cylinder re-extends. In this process, the solder wire on the previous welding point re-solidifies. After all welding points are welded back and forth in this way, the equipment stops for 5-15 seconds to give the solder wire on the last welding point time to solidify, and the patch action is completed;

[0022] S6, unloading: The driving motor drives the conveyor belt to continue running, and the circuit board with the patch completed is transported to the front end of the equipment, and the assembled circuit board is pulled out from the circuit board insertion side;

[0023] S7, continuous operation: repeat the steps S4 to S6 to complete the repetitive processing action.

[0024] Compared with the prior art, the present invention provides a circuit board automatic patch device and a patch process thereof, which has the following beneficial effects:

[0025] 1. The circuit board automatic patch equipment and its patch process are combined and connected by setting a support frame, a bottom bracket, a conveying component and a patch welding component to form a detachable automatic patch equipment. The flexible structure of the patch equipment is realized by disassembling and replacing several main structures, which is convenient for disassembling, transporting and storing the equipment and replacing various components of the equipment, so that the assembled equipment can meet the needs of various circuit boards and circuit board components, thereby improving the flexibility of the use of the circuit board patch equipment;

[0026] 2. The circuit board automatic patch equipment and its patch process are provided with a conveyor belt carrying circuit board positioning strips, and the circuit board is clamped and fixed by the circuit board positioning grooves on the adjacent sides of the adjacent circuit board positioning strips. The circuit board positioning strips are fixed by connecting bolts, which is convenient for disassembly and assembly of the circuit board positioning strips. The circuit board positioning strips made of rubber material have less wear during the loading and unloading process, which reduces the wear of the equipment. At the same time, the circuit board positioning strips themselves have a certain elasticity to prevent the circuit board positioning structure from loosening after the equipment has been running for a certain period of time, thereby ensuring the accuracy of circuit board positioning during long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a circuit board automatic placement equipment of the present invention;

[0028] Figure 2 This is a schematic diagram of the anti-slip pad connection structure of a circuit board automatic placement equipment of the present invention;

[0029] Figure 3 This is a schematic diagram of the bottom support structure of a circuit board automatic patch equipment of the present invention

[0030] Figure 4 This is a schematic diagram of the structure of a conveying component of a circuit board automatic placement device of the present invention;

[0031] Figure 5 A circuit board positioning strip of a circuit board automatic placement device of the present invention;

[0032] Figure 6 A circuit board automatic patch device of the present invention Figure 1 A partial enlarged view of the middle part;

[0033] Figure 7 A circuit board automatic patch device of the present invention Figure 2 A partial enlarged view of part B in the middle;

[0034] Figure 8 The present invention is a side view of a chassis of a circuit board automatic placement device.

[0035] In the figure: 1, support frame; 11, connecting groove; 12, sleeve; 13, bottom bracket; 14, sliding assembly; 15, anti-skid pad; 16, universal wheel; 17, bottom support; 1701, outer protrusion; 1702, anti-skid sleeve; 18, slide groove; 19, positioning baffle; 2, conveying assembly; 21, connecting plate; 22, handle; 23, driving motor; 24, connecting rod; 25, support rod; 26, guide rod; 2601, guide wheel; 27, conveyor belt; 2701, positioning hole; 28, line Circuit board positioning strip; 2801, connecting bolt; 2802, metal frame; 2803, circuit board positioning slot; 3, patch welding assembly; 31, sliding bracket; 32, roller; 33, linear motor; 34, positioning block; 3401, slot; 35, chassis; 36, positioning bolt; 37, limit slot; 3701, metal pad; 38, first electric cylinder; 39, second electric cylinder; 310, mechanical claw; 311, swing motor; 312, telescopic arm; 313, welding head. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-8 The present invention discloses an automatic patch device for a circuit board, comprising a support frame 1, a conveying assembly 2 is arranged on the side of the support frame 1, and a patch welding assembly 3 is arranged above the conveying assembly 2; a connecting groove 11 is provided on the side of the support frame 1, a sleeve 12 is fixedly connected to the lower end of the support frame 1, and the support frame 1 is slidably connected to a bottom bracket 13 through the sleeve 12, a sliding assembly 14 or an anti-slip pad 15 is nested at the bottom of the bottom bracket 13, a universal wheel 16 is provided at the bottom of the sliding assembly 14, and a bottom support 17 is rotatably connected to the front and rear ends of the sliding assembly 14, a slide groove 18 is provided on the top of the support frame 1, and a positioning baffle 19 is provided on the side of the slide groove 18;

[0038] The left and right ends of the conveying assembly 2 are fixedly connected with connecting plates 21, the front end of the conveying assembly 2 is fixedly connected with a handle 22, the inside of the conveying assembly 2 is fixedly installed with a driving motor 23, the middle of the conveying assembly 2 is fixedly connected with a connecting rod 24, the inner side of the conveying assembly 2 is rotatably connected with a support rod 25 and a guide rod 26, the outer side of the guide rod 26 is transmission-connected with a conveying belt 27, and the surface of the conveying belt 27 is fixedly installed with a circuit board positioning strip 28;

[0039] The two ends of the patch welding component 3 are fixedly connected with sliding brackets 31, the bottom of the sliding bracket 31 is provided with rollers 32, the side of the sliding bracket 31 is fixedly installed with a linear motor 33, the movable end of the linear motor 33 is fixedly connected with a positioning block 34, the middle of the patch welding component 3 is slidably connected with a chassis 35, both sides of the chassis 35 are provided with positioning bolts 36, the upper surface of the patch welding component 3 is provided with a limiting groove 37, the inside of the chassis 35 is fixedly installed with a first electric cylinder 38 and a second electric cylinder 39, the lower end of the first electric cylinder 38 is fixedly installed with a mechanical claw 310, the bottom of the second electric cylinder 39 is fixedly installed with a swing motor 311, the output end of the swing motor 311 is provided with a telescopic arm 312, and the end of the telescopic arm 312 away from the swing motor 311 is fixedly installed with an electric welding head 313.

[0040] Specifically, the connecting groove 11 is symmetrically opened on opposite sides of the upper end of the support frame 1, and the connecting groove 11 is arranged in a one-to-one correspondence with the connecting plate 21. The cross-section of the connecting plate 21 is L-shaped, and the conveying component 2 is slidably connected to the upper end of the support frame 1 through the connecting plate 21 and the connecting groove 11 and is fixed by bolts.

[0041] In this embodiment, the conveying component 2 is slidably connected to the side of the connecting groove 11 through the connecting plate 21, which plays a combined connection role for the support frame 1 and the conveying component 2, making it convenient to disassemble and assemble the equipment, which is convenient for maintenance and storage and transportation.

[0042] Specifically, the bottom support 17 is U-shaped and its width is greater than the width of the sliding component 14. An outer protrusion 1701 is provided on the inner side of the bottom support 17. Two outer protrusions 1701 are symmetrically provided on the left and right. An anti-slip cover 1702 is attached to the outer side of the bottom support 17. When the bottom support 17 swings to the front and rear sides of the sliding component 14, it is fixed by a magnetic buckle.

[0043] In this embodiment, the bottom support 17 is rotatably connected to the front and rear ends of the sliding component 14, and two positioning positions are formed by swinging the bottom support 17. When the bottom support 17 is tilted upward on the front and rear sides of the sliding component 14, the sliding component 14 uses the universal wheel 16 as a supporting structure and can slide through the universal wheel 16 for easy movement. When the bottom support 17 is tilted downward on the front and rear sides of the sliding component 14, the horizontal part of the bottom support 17 is below the sliding component 14. The setting of the outer protrusion 1701 makes a certain gap between the horizontal part of the bottom support 17 and the sliding component 14, so that the distance between the lower edge of the bottom support 17 and the sliding component 14 is greater than the overall height of the universal wheel 16, thereby replacing the universal wheel 16 to support the sliding component 14, and the sliding component 14 can no longer slide through the universal wheel 16, thereby playing a positioning role for the equipment.

[0044] Specifically, a guide wheel 2601 is coaxially arranged on the guide rod 26, and the guide wheels 2601 are evenly arranged on the guide rod 26 at equal intervals. The conveyor belt 27 is tightly fitted to the outside of the guide wheel 2601, and the guide rod 26 is symmetrically arranged at the front and rear ends of the conveying component 2. The output end of the drive motor 23 and one of the support rods 25 are fitted to the inner side of the conveyor belt 27 and are evenly arranged at equal intervals.

[0045] In this embodiment, the driving motor 23 drives a guide rod 26 to rotate during operation, and drives the conveyor belt 27 to run through the guide wheel 2601 on the guide rod 26, which drives the circuit board positioning strip 28 fixedly installed on the surface of the conveyor belt 27. The guide wheels 2601 on the guide rod 26 ensure the stability of the support for the conveyor belt 27. At the same time, the gap between the guide wheels 2601 leaves space for the connecting bolts 2801 and the nuts. The setting of the support rod 25 supports the upper part of the conveyor belt 27, avoids excessive concave of the upper part of the conveyor belt 27, and ensures the stability of the support and drive of the circuit board positioning strip 28 and the circuit board fixed between the circuit board positioning strip 28.

[0046] Specifically, positioning holes 2701 are opened at equal intervals on the surface of the conveyor belt 27, and the positioning holes 2701 are arranged in two rows on the surface of the conveyor belt 27. Two connecting bolts 2801 are threadedly connected to the circuit board positioning strip 28, and the spacing between the two connecting bolts 2801 is the same as the spacing between the two rows of positioning holes 2701. A metal frame 2802 is nested on the outside of the circuit board positioning strip 28. The connecting bolts 2801 penetrate the circuit board positioning strip 28, the metal frame 2802 and the positioning holes 2701 and are threadedly connected with nuts. The circuit board positioning strip 28 is made of rubber material, and circuit board positioning grooves 2803 are opened on the front and back sides of the circuit board positioning strip 28. The above-mentioned circuit board positioning groove 2803 and its side walls are both protruding from the metal frame 2802.

[0047] In this embodiment, the positioning holes 2701 opened on the conveyor belt 27 provide multiple locations for fixing the circuit board positioning strip 28. The installation interval of the circuit board positioning strip 28 is adjusted according to the width of the circuit board. The circuit board positioning strip 28 is fixed by plugging the connecting bolts 2801 into the positioning holes 2701 and cooperating with the nuts. The circuit board positioning strip 28 is fixed. The circuit board positioning strip 28 made of rubber material has good elasticity. In the process of fixing the circuit board, it can make way for the circuit board through elastic deformation, which facilitates the circuit board to be inserted into the circuit board positioning groove 2803. At the same time, the rubber material itself has an anti-slip effect, which improves the fixing stability of the circuit board. The metal frame 2802 nested outside the circuit board positioning strip 28 reinforces the circuit board positioning strip 28, ensures the stability of the circuit board positioning strip 28 fixed by the connecting bolts 2801, and reduces the displacement of the circuit board caused by deformation.

[0048] Specifically, the lower end of the sliding bracket 31 is extended and set inside the slide groove 18, the roller 32 is rollingly set on the lower inner wall of the slide groove 18, the lower surface of the positioning block 34 is provided with a slot 3401 with the positioning baffle 19, the positioning baffle 19 is embedded in the positioning block 34 through the slot 3401, and the linear motor 33 is set along the slide groove 18.

[0049] The cam 33 is driven by the linear motor 33 to adjust the relative position between the locating block 34 and the sliding bracket 31, and then the sliding bracket 31 is driven by the reaction force to move forward and backward above the support frame 1, thereby adjusting the front and rear position of the chassis 35, and the positioning baffle 19 is inserted into the slot 3401 from below to be connected with the positioning block 34, which is consistent with the moving direction of the sliding bracket 31 in the slot 18. When the sliding bracket 31 is set in the slot 18, the positioning block 34 and the positioning baffle 19 can be synchronously connected, thereby facilitating the combined connection of the patch welding component 3 and the support frame 1.

[0050] Specifically, a metal pad 3701 is attached to the surface of the limiting groove 37, and ridges are arranged at equal intervals on the upper surface of the metal pad 3701. The lower end of the positioning bolt 36 is tightly attached to the metal pad 3701, and scale lines are arranged on the surface of the metal pad 3701.

[0051] In this embodiment, the chassis 35 is slidably connected to the patch welding component 3, and the connection structure between the chassis 35 and the patch welding component 3 plays a fixing role in the gap between the chassis 35 and the patch welding component 3. The metal pad 3701 plays a wear-resistant role on the inner wall of the limit groove 37. The chassis 35 is slidably set in the middle of the patch welding component 3. The positioning bolt 36 is rotated to make the positioning bolt 36 contact or separate from the metal pad 3701. When the positioning bolt 36 contacts the metal pad 3701, the friction between the positioning bolt 36 and the metal pad 3701 and the convex ridges on the metal pad 3701 fix the position of the chassis 35 on the limit groove 37.

[0052] Specifically, the chassis 35 is set based on a PLC controller, the linear motor 33, the first electric cylinder 38, the second electric cylinder 39, the swing motor 311, the telescopic arm 312 and the welding head 313 are all electrically connected to the PLC controller, the drive motor 23 is connected to the wire through the joint interface structure and is electrically connected to the PLC controller in the chassis 35, and the telescopic arm 312 is set based on an electric telescopic rod.

[0053] In this embodiment, the PLC controller in the chassis 35 controls the linear motor 33, the first electric cylinder 38, the second electric cylinder 39, the swing motor 311, the telescopic arm 312 and the electric welding head 313. The front and rear positions of the chassis 35 above the patch welding component 3 are adjusted by the setting of the linear motor 33. The height of the mechanical claw 310 is adjusted by the setting of the first electric cylinder 38. The mechanical claw 310 is a common manipulator structure on the market. It clamps the circuit board components of the patch. The circuit components are placed on the first electric cylinder 38 by moving it downward. After the components on the circuit board are in the position to be installed, the mechanical claw 310 releases the circuit components and the first electric cylinder 38 retracts. Subsequently, the linear motor 33 drives the chassis 35 to adjust its position forward and backward, so that the second electric cylinder 39 moves to the position to be processed. The angle of the telescopic arm 312 is adjusted by the swing motor 311. In conjunction with the extension and retraction of the telescopic arm 312, the welding head 313 is directly facing the pins of the circuit components that need to be spot welded. The second electric cylinder 39 moves downward so that the welding head 313 is spot-welded on the pins to be welded, thereby performing a welding combination on the circuit board and the components on the circuit board. Repeating the above steps completes the welding and installation action of a single circuit component.

[0054] A chip placement process of a circuit board automatic chip placement device comprises the following steps:

[0055] S1. Selection and assembly preparation of conveyor assembly 2: According to the spacing between the positioning holes 2701 on the conveyor belt 27, the conveyor assembly 2 is provided with various specifications. According to the width of the circuit board to be processed and the size of the selected circuit board positioning strip 28, the conveyor belt 27 with appropriate specifications is selected, and the circuit board positioning strips 28 are attached to the side-by-side positioning holes 2701 one by one. The connecting bolts 2801 are bolted into the circuit board positioning strips 28. The connecting bolts 2801 penetrate the circuit board positioning strips 28 themselves, the metal frame 2802 and the positioning holes 2701. The nuts are threadedly connected from the back of the conveyor belt 27 to the connecting bolts 2801, and the preparation of conveyor assembly 2 is completed;

[0056] S2. Assembly installation of the support frame 1: According to the processing scenario, a sliding assembly 14 or an anti-skid pad 15 is installed at the bottom of the support frame 1, the bottom bracket 13 is nested on the upper surface of the sliding assembly 14 or the anti-skid pad 15, and the support frame 1 is erected above the bottom bracket 13, so that the column at the upper end of the bottom bracket 13 is inserted into the sleeve 12, and the height of the support frame 1 is adjusted and then bolted in to fix it;

[0057] S3, combined installation of equipment: place the conveying assembly 2 in front of the support frame 1, so that the connecting plate 21 is opposite to the connecting groove 11, push the conveying assembly 2 into the inner side of the support frame 1, so that the connecting plate 21 completely slides into the connecting groove 11, and fixes it by bolting bolts from the side of the support frame 1, and erect the patch welding assembly 3 on the top of the support frame 1 from above. During the erection process, the positioning block 34 is buckled on the top of the positioning baffle 19, so that the positioning baffle 19 is inserted into the card slot 3401, and the roller 32 is placed in the slide slot 18, and the erection of the patch welding assembly 3 is completed. Adjust the position of the chassis 35 left and right so that the chassis 35 is directly above the center line of the conveyor belt 27, screw in the positioning bolts 36 so that it fits tightly with the limit slot 37, and position the chassis 35;

[0058] S4, loading and pretreatment: insert the circuit board to be mounted from the side between two adjacent circuit board positioning bars 28 at the rear end of the conveying component 2, and make the front and rear edges of the circuit board slide into the circuit board positioning grooves 2803 on the adjacent circuit board positioning bars 28. The inner wall of the circuit board positioning groove 2803 is tightly fitted with the circuit board under the elastic action of the rubber material. Bend a concave surface at each pin of the circuit element to be processed by needle-nosed pliers, cut a section from the end of the solder wire, the length of the cut solder wire is not more than twice the width of the pin, and the cut solder wire is embedded in the above concave surface to complete the pretreatment of the circuit board components. Place the circuit element to be processed on the inner side of the mechanical claw 310, and the mechanical claw 310 grasps the circuit board component;

[0059] S5, patch: the drive motor 23 works to drive the guide rod 26 to rotate, drive the conveyor belt 27 to run, drive the patch to be patched to move forward to the bottom of the chassis 35, the first electric cylinder 38 extends, drives the mechanical claw 310 to move down, and places the circuit board components to the circuit board to be patched area. After the mechanical claw 310 is released, the first electric cylinder 38 contracts and passes new circuit board components to the inside of the mechanical claw 310. The mechanical claw 310 retracts and grabs the circuit board components. At this time, the second electric cylinder 39 extends, cooperates with the swing motor 311 and the telescopic arm 312 to adjust the position of the electric welding head 313 so that the electric welding head 313 is against the circuit board. The solder wire embedded in the pins of the board components to be welded is heated by the electric welding head 313 to melt it into droplets. The droplets formed by the melting of the solder wire overflow to the soldering points of the circuit board. Then the second electric cylinder 39 retracts. After the electric welding head 313 moves to a position facing another pin under the action of the swing motor 311 and the telescopic arm 312, the second electric cylinder 39 re-extends. In this process, the solder wire on the previous welding point re-solidifies. After all welding points are welded back and forth in this way, the equipment is shut down for 5-15 seconds to allow the solder wire on the last welding point to solidify, and the patch action is completed.

[0060] S6, unloading: the driving motor 23 drives the conveyor belt 27 to continue running, and the circuit board with the patch completed is conveyed to the front end of the equipment, and the assembled circuit board is pulled out from the circuit board insertion side;

[0061] S7, continuous operation: repeat the steps S4 to S6 to complete the repetitive processing action.

[0062] In summary, the circuit board automatic patch equipment and its patch process are combined and connected by setting a support frame 1, a base 13, a conveying component 2 and a patch welding component 3 to form a detachable automatic patch equipment. The flexible structure of the patch equipment is achieved through the disassembly and replacement of several main structures, which is convenient for disassembly, transportation and storage of the equipment, and also convenient for replacement of various components of the equipment, so that the assembled equipment can meet the needs of a variety of different circuit boards and circuit board components, thereby improving the flexibility of the use of the circuit board patch equipment; by setting a conveyor belt 27 to carry a circuit board positioning bar 28, the circuit board is clamped and fixed by the circuit board positioning groove 2803 on the adjacent side of the adjacent circuit board positioning bar 28, and the circuit board positioning bar 28 is fixed by the connecting bolt 2801, which is convenient for disassembly and assembly of the circuit board positioning bar 28. The circuit board positioning bar 28 made of rubber is less worn during the loading and unloading process, which reduces the wear of the equipment. At the same time, the circuit board positioning bar 28 itself has a certain elasticity to prevent the circuit board positioning structure from loosening after the equipment has been running for a certain period of time, thereby ensuring the accuracy of circuit board positioning during long-term operation.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit board automatic patch device, comprising a support frame (1), characterized in that: A conveying assembly (2) is arranged on the side of the support frame (1), and a patch welding assembly (3) is arranged above the conveying assembly (2); The side of the support frame (1) is provided with a connecting groove (11), the lower end of the support frame (1) is fixedly connected with a sleeve (12), the support frame (1) is slidably connected with a base bracket (13) through the sleeve (12), the bottom of the base bracket (13) is embedded with a sliding component (14) or an anti-slip pad (15), the bottom of the sliding component (14) is provided with a universal wheel (16), the front and rear ends of the sliding component (14) are rotatably connected with a base bracket (17), the top of the support frame (1) is provided with a sliding groove (18), and the side of the sliding groove (18) is provided with a positioning baffle (19); The left and right ends of the conveying assembly (2) are fixedly connected with connecting plates (21), the front end of the conveying assembly (2) is fixedly connected with a handle (22), the interior of the conveying assembly (2) is fixedly installed with a driving motor (23), the middle of the conveying assembly (2) is fixedly connected with a connecting rod (24), the inner side of the conveying assembly (2) is rotatably connected with a support rod (25) and a guide rod (26), the outer side of the guide rod (26) is transmission-connected with a conveying belt (27), and a circuit board positioning strip (28) is fixedly installed on the surface of the conveying belt (27); The two ends of the patch welding assembly (3) are fixedly connected to sliding brackets (31), the bottom of the sliding bracket (31) is provided with a roller (32), the side of the sliding bracket (31) is fixedly installed with a linear motor (33), the movable end of the linear motor (33) is fixedly connected to a positioning block (34), the middle of the patch welding assembly (3) is slidably connected to a chassis (35), and positioning bolts (36) are provided on both sides of the chassis (35). A limiting groove (37) is provided on the upper surface, and a first electric cylinder (38) and a second electric cylinder (39) are fixedly installed inside the chassis (35); a mechanical claw (310) is fixedly installed at the lower end of the first electric cylinder (38), and a swing motor (311) is fixedly installed at the bottom of the second electric cylinder (39); a telescopic arm (312) is provided at the output end of the swing motor (311), and an electric welding head (313) is fixedly installed at one end of the telescopic arm (312) away from the swing motor (311).

2. The circuit board automatic placement equipment according to claim 1, characterized in that: The connecting grooves (11) are symmetrically arranged on opposite sides of the upper end of the support frame (1); the connecting grooves (11) and the connecting plates (21) are arranged in a one-to-one correspondence; the cross section of the connecting plate (21) is L-shaped; the conveying assembly (2) is slidably connected to the upper end of the support frame (1) through the connecting plate (21) and the connecting grooves (11) and is fixed by bolts.

3. The circuit board automatic placement equipment according to claim 1, characterized in that: The bottom support (17) is U-shaped and has a width greater than the width of the sliding component (14). An outer protrusion (1701) is provided on the inner side of the bottom support (17). Two outer protrusions (1701) are symmetrically provided on the left and right. An anti-slip cover (1702) is attached to the outer side of the bottom support (17). When the bottom support (17) is swung to the front and rear sides of the sliding component (14), it is fixed by a magnetic buckle.

4. The circuit board automatic placement equipment according to claim 1, characterized in that: A guide wheel (2601) is coaxially arranged on the guide rod (26), and the guide wheel (2601) is evenly arranged on the guide rod (26) at equal intervals. The conveyor belt (27) is tightly fitted on the outside of the guide wheel (2601). The guide rod (26) is symmetrically arranged at the front and rear ends of the conveying component (2). The output end of the drive motor (23) and one of the support rods (25) are fitted on the inner side of the conveyor belt (27) and are evenly arranged at equal intervals.

5. The circuit board automatic placement equipment according to claim 1, characterized in that: The surface of the conveyor belt (27) is provided with positioning holes (2701) at equal intervals. The positioning holes (2701) are arranged in two rows on the surface of the conveyor belt (27). Two connecting bolts (2801) are threadedly connected to the circuit board positioning strip (28) and the spacing between the two connecting bolts (2801) is the same as the spacing between the two rows of positioning holes (2701). A metal frame (2802) is embedded on the outside of the circuit board positioning strip (28). The connecting bolts (2801) penetrate the circuit board positioning strip (28), the metal frame (2802) and the positioning holes (2701) and are threadedly connected with nuts. The circuit board positioning strip (28) is made of rubber material. Circuit board positioning grooves (2803) are arranged on the front and rear sides of the circuit board positioning strip (28). The circuit board positioning groove (2803) and its side walls are both protruding from the metal frame (2802).

6. The circuit board automatic placement equipment according to claim 1, characterized in that: The lower end of the sliding bracket (31) is extended and arranged inside the slide groove (18), the roller (32) is rollingly arranged on the lower inner wall of the slide groove (18), the lower surface of the positioning block (34) is provided with a slot (3401) for the positioning baffle (19), the positioning baffle (19) is embedded in the positioning block (34) through the slot (3401), and the linear motor (33) is arranged along the slide groove (18).

7. The circuit board automatic placement equipment according to claim 1, characterized in that: The surface of the limiting groove (37) is fitted with a metal pad (3701), the upper surface of the metal pad (3701) is provided with ridges at equal intervals, the lower end of the positioning bolt (36) is tightly fitted with the metal pad (3701), and the surface of the metal pad (3701) is provided with scale lines.

8. The circuit board automatic placement equipment according to claim 1, characterized in that: The chassis (35) is arranged based on a PLC controller; the linear motor (33), the first electric cylinder (38), the second electric cylinder (39), the swing motor (311), the telescopic arm (312) and the welding head (313) are all electrically connected to the PLC controller; the drive motor (23) is connected to a wire through a joint interface structure and is electrically connected to the PLC controller in the chassis (35); and the telescopic arm (312) is arranged based on an electric telescopic rod.

9. A chip placement process for a circuit board automatic chip placement device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, selection and assembly preparation of the conveying assembly (2): according to the spacing between the positioning holes (2701) on the conveying belt (27), the conveying assembly (2) is provided with various specifications. According to the width of the circuit board to be processed and the size of the selected circuit board positioning strip (28), a conveying belt (27) with suitable specifications is selected, the circuit board positioning strips (28) are fitted one by one on the side-by-side positioning holes (2701), and the connecting bolts (2801) are bolted into the circuit board positioning strips (28). The connecting bolts (2801) penetrate the circuit board positioning strips (28), the metal frame (2802) and the positioning holes (2701), and the nuts are threadedly connected from the back of the conveying belt (27) to the connecting bolts (2801), thereby completing the preparation of the conveying assembly (2); S2. Assembly installation of the support frame (1): according to the processing scene requirements, a sliding assembly (14) or an anti-skid pad (15) is installed at the bottom of the support frame (1), the bottom bracket (13) is nested on the upper surface of the sliding assembly (14) or the anti-skid pad (15), the support frame (1) is erected above the bottom bracket (13), the column at the upper end of the bottom bracket (13) is inserted into the sleeve (12), the height of the support frame (1) is adjusted, and then bolts are inserted to fix it; S3, combined installation of equipment: place the conveying assembly (2) in front of the support frame (1) so that the connecting plate (21) is opposite to the connecting groove (11), push the conveying assembly (2) into the inner side of the support frame (1), make the connecting plate (21) completely slide into the connecting groove (11), and fix it by bolting bolts from the side of the support frame (1), and set the patch welding assembly (3) on the top of the support frame (1) from above. During the setting process, the positioning block (34) is buckled on the top of the positioning baffle (19), so that the positioning baffle (19) is inserted into the slot (3401), and the roller (32) is placed in the slide slot (18), and the setting of the patch welding assembly (3) is completed. Adjust the position of the chassis (35) left and right so that the chassis (35) is directly above the center line of the conveyor belt (27), screw in the positioning bolts (36) so that it fits tightly with the limit slot (37), and position the chassis (35); S4, loading and pre-processing: insert the circuit board to be mounted from the side between two adjacent circuit board positioning strips (28) at the rear end of the conveying component (2), and slide the front and rear edges of the circuit board into the circuit board positioning grooves (2803) on the adjacent circuit board positioning strips (28). The inner wall of the circuit board positioning groove (2803) is tightly fitted with the circuit board under the elastic action of the rubber material. Bend a concave surface at each pin of the circuit element to be processed by needle-nosed pliers, cut a section from the end of the solder wire, the length of the cut solder wire is not more than twice the width of the pin, and the cut solder wire is embedded in the above concave surface to complete the pre-processing of the circuit board element. Place the circuit element to be processed on the inner side of the mechanical claw (310), and the mechanical claw (310) grasps the circuit board element; S5, patch: the drive motor (23) works to drive the guide rod (26) to rotate, drive the conveyor belt (27) to run, drive the patch to be patched to move forward to the bottom of the chassis (35), the first electric cylinder (38) extends, drives the mechanical claw (310) to move downward, and places the circuit board components to the circuit board patch area. After the mechanical claw (310) is released, the first electric cylinder (38) contracts and passes a new circuit board component to the inside of the mechanical claw (310). The mechanical claw (310) retracts again to grab the circuit board component. At this time, the second electric cylinder (39) extends, cooperates with the swing motor (311) and the telescopic arm (312) to adjust the position of the electric welding head (313) so that the electric welding head (313) is pressed against the solder wire embedded in the pin of the circuit board component to be welded, and the solder wire is heated by the electric welding head (313) to melt it into droplets, and the droplets formed by the melting of the solder wire overflow to the soldering point of the circuit board, and then the second electric cylinder (39) retracts, and after the electric welding head (313) moves to a position facing another pin under the action of the swing motor (311) and the telescopic arm (312), the second electric cylinder (39) is extended again. In this process, the solder wire on the previous welding point is resolidified. After all welding points are welded back and forth in this way, the equipment is shut down for 5-15 seconds to allow the solder wire on the last welding point to solidify, and the patch action is completed; S6, unloading: the driving motor (23) drives the conveyor belt (27) to continue running, and conveys the circuit board with the patch completed to the front end of the equipment, and the assembled circuit board is pulled out from the circuit board insertion side; S7, continuous operation: repeat the steps S4 to S6 to complete the repetitive processing action.

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