Reflow soldering device used in SMT (Surface Mount Technology) process

Abstract

The invention discloses a reflow soldering device used in an SMT (Surface Mount Technology) process, which comprises a reflow soldering furnace assembly and a workpiece loading assembly connected with the reflow soldering furnace assembly, the reflow soldering furnace assembly comprises an annular upper furnace cover structure and an annular lower furnace cover structure, the upper furnace cover structure is detachably connected with the lower furnace cover structure, and the workpiece loading assembly is connected with the upper furnace cover structure. An annular cavity groove is formed in the lower furnace cover structure, an electromagnetic sliding rail is arranged in the cavity groove, a fixing structure is slidably connected to the electromagnetic sliding rail, linear guide pipes are symmetrically arranged on the inner side of the lower furnace cover structure and the inner side of the upper furnace cover structure, and a plurality of heating pieces are evenly arranged on the inner wall of the upper furnace cover structure at equal intervals. A storage ring is arranged on the outer wall of the upper furnace cover structure, and welding structures are arranged in the middle of the interior of the upper furnace cover at equal intervals. The annular reflow oven is adopted, conveying is convenient, reciprocating multi-angle welding machining can be conducted, the welding effect is good, and the overall efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of SMT processing equipment, in particular to a reflow soldering device used in the SMT patch process. Background Art

[0002] SMT refers to surface mount technology, which is the most popular technology and process in the current electronic assembly industry. The simplified process flow includes: printing, patch, welding and maintenance. The device used for welding is a reflow oven, which is also called a reflow machine or "reflow oven". It provides a heating environment to melt the solder paste so that the surface mount components can be reliably combined together through the solder paste alloy. In the SMT (surface mount technology) patch process, the reflow soldering device is one of the indispensable equipment. The reflow soldering device is used to complete the welding connection between the patch components (such as chips, resistors, capacitors, etc.) and the printed circuit board (PCB).

[0003] The existing reflow furnace is provided with a conveyor belt, on which a storage frame is provided. The SMT components are placed in the storage frame, and then the SMT components are transferred to the reflow furnace under the action of the conveyor belt. The linear reciprocating motion is adopted, and multi-angle cyclic transmission operation cannot be performed. The overall welding effect is poor. Therefore, it is necessary to design corresponding technical solutions to solve the existing technical problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a reflow soldering device for use in the SMT patch process, which solves the problem that: a conveyor belt is provided in the existing reflow soldering furnace, a storage frame is provided on the conveyor belt, SMT components are placed in the storage frame, and then the SMT components are transferred to the reflow soldering furnace under the action of the conveyor belt, a linear reciprocating motion is adopted, multi-angle cyclic transmission operation cannot be performed, and the overall welding effect is poor.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a reflow soldering device for use in an SMT patch process, comprising a reflow furnace assembly and a workpiece loading assembly connected to the reflow furnace assembly, the reflow furnace assembly comprising an annular upper furnace hood structure and a lower furnace hood structure, the upper furnace hood structure is detachably connected to the lower furnace hood structure, an annular cavity groove is provided inside the lower furnace hood structure, and an electromagnetic slide rail is provided in the cavity groove, a fixed structure is slidably connected to the electromagnetic slide rail, a linear guide tube is symmetrically provided on the inner side of the lower furnace hood structure and the upper furnace hood structure, a plurality of heating plates are evenly and equidistantly provided on the inner wall of the upper furnace hood structure, a storage ring is provided on the outer wall of the upper furnace hood structure, and a welding structure is evenly provided in the middle of the upper furnace hood.

[0008] As a further preferred embodiment of the present invention, the workpiece loading assembly includes a frame plate, the top of the frame plate is vertically connected to a loading box, the top of the loading box is open and a movable plate that can be raised and lowered is arranged inside, two hydraulic cylinders 1 are symmetrically arranged on the outside of the loading box, the output end of the hydraulic cylinder 1 is connected to a push plate, and two conveying pipes are arranged near the inner end of the loading box, and the conveying pipes are connected to the guide pipe.

[0009] As a further preferred embodiment of the present invention, a transfer structure is arranged on the outer wall of the loading box, the transfer structure includes two ingots, the ingots are connected to the side walls of the loading box, and a motor is arranged at one end of the ingot, the output end of the motor is connected to a linkage shaft, an L-shaped mechanical arm is connected to the outer end of the linkage shaft, an opening is arranged at the end of the mechanical arm, and a hydraulic cylinder 2 is arranged on the outer wall on the side close to the opening, and a clamping block is connected to the output end of the hydraulic cylinder 2.

[0010] As a further preferred embodiment of the present invention, the fixed structure includes a slider, a mounting plate is arranged on the top of the slider, and a placement plate is connected to the top of the mounting plate. The placement plate is in the shape of an elongated strip, and a plurality of slots are equidistantly provided on the top of the placement plate.

[0011] As a further preferred embodiment of the present invention, the welding structure comprises a guide ring, the bottom of the guide ring is detachably connected to a plurality of link frames, and the bottom end of the link frame is connected to a welding head.

[0012] As a further preferred embodiment of the present invention, suspension rods are provided on the outer walls on both sides of the loading box, a support plate is provided in the middle of the top of the suspension rod, and an air conditioner is connected to the bottom end of the support plate.

[0013] As a further preferred embodiment of the present invention, a plurality of support rods are equidistantly arranged at the bottom of the lower furnace hood structure.

[0014] As a further preferred embodiment of the present invention, a nitrogen box is provided on one side of the top outer wall of the upper furnace cover structure, and an oxygen box is provided on the other side.

[0015] (III) Beneficial effects

[0016] The present invention provides a reflow soldering device for use in the SMT patch process. It has the following beneficial effects:

[0017] (1) In the reflow soldering device of the present invention during the SMT patch process, the reflow furnace assembly is designed in a ring shape, and an electromagnetic slide rail of a corresponding shape is added to the cavity groove of the lower furnace cover structure, which can drive the fixed structure to move in a ring shape. A plurality of heating plates are evenly and equidistantly arranged on the inner wall of the upper furnace cover structure, which is divided into multiple areas and set to multiple temperatures for welding. At the same time, a nitrogen box is arranged on one side of the top outer wall of the upper furnace cover structure, and an oxygen box is arranged on the other side to adjust the internal atmosphere environment with different concentrations to improve the welding effect.

[0018] (2) The workpiece loading assembly of the present invention can quickly assemble the workpiece. The top of the vertical frame plate is vertically connected to a loading box. The top of the loading box is open and a movable plate that can be raised and lowered is arranged inside. When the movable plate is raised, it can cooperate with the transfer structure. A motor is arranged at one end of the ingot, which drives a mechanical arm through a linkage shaft. An opening is arranged at the end of the mechanical arm, and a hydraulic cylinder 2 is arranged on the outer wall on one side close to the opening. The workpiece is clamped and fixed by driving a clamp block, and is loaded into a slot on the top of the placement plate. The movable plate is then lowered and pushed into the reflow furnace assembly by the hydraulic cylinder 1. The bottom of the welding structure guide ring in the reflow furnace assembly has multiple welding heads, which can be used for welding the workpiece at different angles and positions. The overall welding effect is good and the production efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 It is a side view structural schematic diagram of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the front view of the present invention;

[0022] Figure 4 It is a schematic diagram of the top view of the loading box of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the upper furnace cover structure of the present invention when viewed from above.

[0024] In the figure: 1. upper furnace cover structure; 2. lower furnace cover structure; 3. electromagnetic slide rail; 4. guide tube; 5. heating plate; 6. storage ring; 7. stand plate; 8. loading box; 9. movable plate; 10. hydraulic cylinder one; 11. push plate; 12. conveying pipe; 13. ingot; 14. motor; 15. linkage shaft; 16. mechanical arm; 17. hydraulic cylinder two; 18. clamping block; 19. slider; 20. placement plate; 21. guide ring; 22. link frame; 23. welding head; 24. suspension rod; 25. support plate; 26. air conditioner; 27. support rod; 28. nitrogen box; 29. ​​oxygen box. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-5 , the embodiment of the present invention provides a technical solution:

[0027] A reflow soldering device for use in an SMT patch process comprises a reflow soldering furnace assembly and a workpiece loading assembly connected to the reflow soldering furnace assembly, wherein the reflow soldering furnace assembly comprises an annular upper furnace cover structure 1 and a lower furnace cover structure 2, wherein the upper furnace cover structure 1 is detachably connected to the lower furnace cover structure 2, an annular cavity groove is provided inside the lower furnace cover structure 2, and an electromagnetic slide rail 3 is provided in the cavity groove, a fixed structure is slidably connected to the electromagnetic slide rail 3, a linear guide tube 4 is symmetrically provided on the inner side of the lower furnace cover structure 2 and the upper furnace cover structure 1, a plurality of heating plates 5 are evenly and equidistantly provided on the inner wall of the upper furnace cover structure 1, a material storage ring 6 is provided on the outer wall of the upper furnace cover structure 1, and a welding structure is evenly provided in the middle of the inner part of the upper furnace cover.

[0028] The workpiece loading assembly includes a stand plate 7, the top of which is vertically connected to a loading box 8. The top of the loading box 8 is open and a movable plate 9 that can be raised and lowered is arranged inside. Two hydraulic cylinders 10 are symmetrically arranged on the outside of the loading box 8. The output end of the hydraulic cylinder 10 is connected to a push plate 11. Two conveying pipes 12 are arranged near the inner end of the loading box 8. The conveying pipes 12 are connected to the guide pipe 4. The position of the fixed structure can be adjusted by using the movable plate 9 inside the loading box to lift and lower, and the fixed structure can also be delivered into the conveying pipe 12 through the push plate 11 using the hydraulic cylinder 10.

[0029] A transfer structure is provided on the outer wall of the loading box 8, and the transfer structure includes two ingots 13. The ingot 13 is connected to the side wall of the loading box 8, and a motor 14 is provided at one end of the ingot 13, and a linkage shaft 15 is connected to the output end of the motor 14. An L-shaped mechanical arm 16 is connected to the outer end of the linkage shaft 15, and an opening is provided at the end of the mechanical arm 16, and a hydraulic cylinder 17 is provided on the outer wall on the side close to the opening, and a clamping block 18 is connected to the output end of the hydraulic cylinder 17. The motor 14 is used to drive the mechanical arm 16 and the clamping block 18 to clamp and fix the workpiece, and then send it to the fixed structure.

[0030] The fixed structure includes a slider 19, a mounting plate is arranged on the top of the slider 19, and a placement plate 20 is connected to the top of the mounting plate. The placement plate 20 is in the shape of an elongated strip, and a plurality of slots are equidistantly provided on the top of the placement plate 20. The workpiece is placed by using the slots on the placement plate 20.

[0031] The welding structure includes a guide ring 21 , the bottom of the guide ring 21 is detachably connected to a plurality of link frames 22 , the bottom end of the link frame 22 is connected to a welding head 23 , and the welding head 23 on the link frame 22 is used to perform welding processing on the workpiece.

[0032] Suspension rods 24 are provided on the outer walls of both sides of the loading box 8, a support plate 25 is provided in the middle of the top of the suspension rod 24, and an air cooler 26 is connected to the bottom end of the support plate 25, and the air cooler 26 is used to cool the workpiece.

[0033] A plurality of support rods 27 are equidistantly arranged at the bottom of the lower furnace cover structure 2 to provide overall support for the lower furnace cover structure.

[0034] A nitrogen box 28 is disposed on one side of the top outer wall of the upper furnace cover structure 1, and an oxygen box 29 is disposed on the other side. The nitrogen box 28 and the oxygen box 29 are used to inject gas into the reflow furnace assembly to adjust the atmosphere.

[0035] Working principle: The reflow furnace assembly adopts a ring-shaped design, and an electromagnetic slide rail 3 of a corresponding shape is added to the cavity of the lower furnace cover structure 2, which can drive the fixed structure to move in a ring. A number of heating plates 5 are evenly and equidistantly arranged on the inner wall of the upper furnace cover structure 1, which are divided into multiple areas to set multiple temperatures for welding. At the same time, a nitrogen box 28 is arranged on one side of the top outer wall of the upper furnace cover structure 1, and an oxygen box 29 is arranged on the other side to adjust the internal atmosphere of different concentrations to improve the welding effect. The workpiece loading assembly can quickly assemble the workpiece. The top of the stand plate 7 is vertically connected to the loading box 8. The top of the loading box 8 is open and has an internal A movable plate 9 is provided which can be raised and lowered. When the movable plate 9 is raised, it can cooperate with the transfer structure. A motor 14 is provided at one end of the ingot 13, which drives a mechanical arm 16 through a linkage shaft 15. An opening is provided at the end of the mechanical arm 16, and a hydraulic cylinder 2 17 is provided on the outer wall on one side close to the opening to clamp and fix the workpiece by driving a clamp block 18, and then install it into the slot on the top of the placement plate 20. Then the movable plate 9 is lowered and pushed into the reflow furnace assembly through a hydraulic cylinder 10. A plurality of welding heads 23 are provided at the bottom of the welding structure guide ring 21 in the reflow furnace assembly, which can weld and process the workpiece at different angles and positions. The overall welding effect is good and the production efficiency is high.

[0036] The present invention comprises: 1. an upper furnace cover structure; 2. a lower furnace cover structure; 3. an electromagnetic slide rail; 4. a guide tube; 5. a heating plate; 6. a material storage ring; 7. a stand plate; 8. a loading box; 9. a movable plate; 10. a hydraulic cylinder 1; 11. a push plate; 12. a conveying pipe; 13. a casting block; 14. a motor; 15. a linkage shaft; 16. a mechanical arm; 17. a hydraulic cylinder 2; 18. a clamping block; 19. a sliding block; 20. a placing plate; 21. a guide ring; 22. a linking frame; 23. a welding head; 24. a suspension rod; 25. a support plate; 26. an air conditioner; 27. a support rod; 28. a nitrogen box; 29. ​​an oxygen box, The components are all universal standard parts or components known to the technicians in this field, and their structures and principles can be known by the technicians in this field through technical manuals or through conventional experimental methods. The problem solved by the present invention is that a conveyor belt is provided in the existing reflow furnace, and a storage frame is provided on the conveyor belt. The SMT components are placed in the storage frame, and then the SMT components are transferred to the reflow furnace under the action of the conveyor belt. The linear reciprocating motion is adopted, and the multi-angle cyclic transmission operation cannot be performed, and the overall welding effect is poor. The present invention combines the above components with each other, and the reflow process of the SMT patch of the present invention is improved. The welding device, the reflow furnace assembly adopts a ring-shaped design, and an electromagnetic slide rail of a corresponding shape is added to the cavity groove of the lower furnace cover structure, which can drive the fixed structure to move in a ring shape. A plurality of heating plates are evenly and equidistantly arranged on the inner wall of the upper furnace cover structure, which are divided into multiple areas and set to multiple temperatures for welding. At the same time, a nitrogen box is arranged on one side of the top outer wall of the upper furnace cover structure, and an oxygen box is arranged on the other side to adjust the internal atmosphere environment with different concentrations to improve the welding effect. The workpiece loading assembly of the present invention can quickly assemble the workpiece, and the top of the stand plate is vertically connected to the loading box, and the top of the loading box It is open and has a movable plate that can be raised and lowered inside. When the movable plate is raised, it can cooperate with the transfer structure. A motor is provided at one end of the ingot, which drives a mechanical arm through a linkage shaft. An opening is provided at the end of the mechanical arm, and a hydraulic cylinder 2 is provided on the outer wall on the side close to the opening to clamp and fix the workpiece by driving the clamp block, and then install it into the slot on the top of the placement plate. The movable plate is then lowered and pushed into the reflow furnace assembly by the hydraulic cylinder 1. There are multiple welding heads at the bottom of the welding structure guide ring in the reflow furnace assembly, which can be used for welding and processing the workpiece at different angles and positions. The overall welding effect is good and the production efficiency is high.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A reflow soldering device for use in an SMT patch process, comprising a reflow furnace assembly and a workpiece loading assembly connected to the reflow furnace assembly, characterized in that: The reflow furnace assembly comprises an annular upper furnace cover structure (1) and a lower furnace cover structure (2), wherein the upper furnace cover structure (1) is detachably connected to the lower furnace cover structure (2), an annular cavity groove is provided inside the lower furnace cover structure (2), and an electromagnetic slide rail (3) is arranged in the cavity groove, and a fixed structure is slidably connected to the electromagnetic slide rail (3), and the inner sides of the lower furnace cover structure (2) and the upper furnace cover structure (1) are symmetrically provided with linear guide tubes (4), a plurality of heating plates (5) are evenly and equidistantly arranged on the inner wall of the upper furnace cover structure (1), a material storage ring (6) is arranged on the outer wall of the upper furnace cover structure (1), and a welding structure is evenly arranged in the middle of the inner part of the upper furnace cover.

2. A reflow soldering device for use in a SMT patch process according to claim 1, characterized in that: The workpiece loading assembly includes a stand plate (7), the top of the stand plate (7) is vertically connected to a loading box (8), the top of the loading box (8) is open and a movable plate (9) that can be raised and lowered is arranged inside, two hydraulic cylinders (10) are symmetrically arranged on the outside of the loading box (8), the output end of the hydraulic cylinder (10) is connected to a push plate (11), and two conveying pipes (12) are arranged near the inner end of the loading box (8), and the conveying pipes (12) are connected to the guide pipe (4).

3. A reflow soldering device for use in a SMT patch process according to claim 2, characterized in that: A transfer structure is arranged on the outer wall of the loading box (8), and the transfer structure includes two ingots (13). The ingots (13) are connected to the side wall of the loading box (8), and a motor (14) is arranged at one end of the ingot (13). The output end of the motor (14) is connected to a linkage shaft (15), and an L-shaped mechanical arm (16) is connected to the outer end of the linkage shaft (15). An opening is arranged at the end of the mechanical arm (16), and a hydraulic cylinder 2 (17) is arranged on the outer wall on the side close to the opening, and a clamping block (18) is connected to the output end of the hydraulic cylinder 2 (17).

4. A reflow soldering device for use in a SMT patch process according to claim 1, characterized in that: The fixing structure comprises a slider (19), a mounting plate is arranged on the top of the slider (19), and a placement plate (20) is connected to the top of the mounting plate. The placement plate (20) is in the shape of an elongated strip, and a plurality of slots are equidistantly provided on the top of the placement plate (20).

5. The reflow soldering device used in the SMT patch process according to claim 1, characterized in that: The welding structure comprises a guide ring (21), the bottom of the guide ring (21) is detachably connected to a plurality of link frames (22), and the bottom end of the link frame (22) is connected to a welding head (23).

6. The reflow soldering device used in the SMT patch process according to claim 3, characterized in that: Suspension rods (24) are arranged on the outer walls of both sides of the loading box (8), a support plate (25) is arranged in the middle of the top of the suspension rod (24), and the bottom end of the support plate (25) is connected to an air conditioner (26).

7. The reflow soldering device used in the SMT patch process according to claim 1, characterized in that: A plurality of support rods (27) are equidistantly arranged at the bottom of the lower furnace cover structure (2).

8. The reflow soldering device used in the SMT patch process according to claim 1, characterized in that: A nitrogen box (28) is arranged on one side of the top outer wall of the upper furnace cover structure (1), and an oxygen box (29) is arranged on the other side.

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