A reflow oven conveying device with clamping function
By introducing a clamping mechanism and guide plate into the reflow oven conveyor, the problems of PCB board warping and position changes during the conveying process are solved, enabling convenient clamping operation and high-quality soldering, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LANGSHI ELECTRONIC EQUIP CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-10
AI Technical Summary
In existing reflow soldering equipment, PCB boards are prone to warping or position changes during transport, affecting soldering quality. Furthermore, existing clamping mechanisms are inconvenient to operate and costly.
Design a reflow oven conveyor with clamping function. The clamping mechanism includes a clamping soft finger, a positioner, an open guide plate, and a closed guide plate. By changing the state of the clamping soft finger through sliding, the automatic clamping and release of the PCB board is achieved. The preload is adjusted by using elastic material and a ball-head plunger positioner to ensure the stability of the conveying process.
It achieves stability and position of PCB board during transportation, avoids warping or displacement, is easy to operate, has low cost, adapts to PCB boards of different thicknesses, and improves welding quality.
Smart Images
Figure CN224477448U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to reflow soldering equipment, and more particularly to a reflow oven conveying device with clamping function. Background Technology
[0002] The currently common reflow soldering process involves placing the PCB board from upstream equipment onto a chain with extended pins and conveying it into the reflow oven. The PCB board, placed freely on the chain pins, is prone to warping or positional changes, especially in the vacuum chamber of the oven. Under vacuum, warping is even more likely, affecting the soldering quality. To address this problem, the industry's common solution is to create a carrier to hold the PCB board, place the carrier on the conveyor line, and then send it to the reflow oven for soldering; however, this method involves high carrier manufacturing costs.
[0003] A search revealed that patent announcement number CN211966241U discloses a workpiece fixture for a reflow soldering machine. Specifically, it includes a frame body, with a welding mechanism located in the middle of the inner side of the frame body. Rolling conveyor chains are located on both sides of the welding mechanism, with guide plates on both sides of the conveyor chains. A fixture is mounted between the two guide plates, and the fixture includes a fixed base. A rod is inserted into the gap of the conveyor chain on the lower end face of the fixed base, and a clamping mechanism that can be adjusted left and right is located on the upper end face of the fixed base near both ends. The clamping mechanism can be adjusted according to PCB boards of different sizes, and the clamping plate clamps and fixes the PCB board under the elastic pressure of a spring. However, this prior art is inconvenient for clamping and releasing the PCB board.
[0004] In summary, the technical problem that needs to be solved is how to design a reflux furnace conveying device that is easy to operate and has a clamping function. Utility Model Content
[0005] The purpose of this invention is to overcome the inconvenience of operation in the existing technology and to provide a reflux furnace conveying device with clamping function.
[0006] The objective of this utility model can be achieved through the following technical solutions.
[0007] According to one aspect of the present invention, a reflux furnace conveying device with clamping function is provided, including a support guide rail, a conveying chain, multiple clamping mechanisms, an open guide plate and a closed guide plate, wherein the conveying chain is mounted on the support guide rail and the object to be clamped is placed on the pin of the conveying chain;
[0008] The clamping mechanism includes a base, a clamping soft finger, and a positioner. The base is fixed on the pin of the conveyor chain, and the clamping soft finger is slidably mounted on the base through the positioner. The sliding direction of the clamping soft finger is perpendicular to the conveying direction of the conveyor chain.
[0009] The opening guide plate and the closing guide plate are installed at different positions on the support guide rail. When the opening guide plate abuts against the clamping soft finger, the clamping soft finger is in an open state and away from the clamped object; when the closing guide plate abuts against the clamping soft finger, the clamping soft finger is in a closed state and abuts against the edge of the clamped object.
[0010] As a preferred technical solution, the base includes a mounting plate and a sliding frame. One end of the mounting plate passes through the pin of the conveyor chain, and the outer chain plate of the conveyor chain is fixed to one side of the mounting plate. The sliding frame is installed at the other end of the mounting plate. The sliding frame is provided with a through hole and a limiting hole with mutually perpendicular axes. The axis of the through hole is perpendicular to the conveyor chain. One end of the clamping soft finger passes through the through hole, and the locator passes through the limiting hole and abuts against the clamping soft finger.
[0011] As a preferred technical solution, the end of the clamping soft finger that passes through the limiting hole is provided with a first groove and a second groove, the first groove being close to the clamped object; when the clamping soft finger is in the open state, the locator abuts against the first groove, and when the clamping soft finger is in the closed state, the locator abuts against the second groove.
[0012] As a preferred technical solution, the mounting plate is U-shaped, including two parallel first mounting plates and a second mounting plate perpendicular to the first mounting plates. The second mounting plate passes through the pin of the conveyor chain. One end of each of the two first mounting plates is connected to one end of the second mounting plate, and a sliding frame is installed at the other end of each plate.
[0013] As a preferred technical solution, the clamping soft finger includes a clamping part that is U-shaped and two sliding parts. The sliding part includes two parallel first sliding rods and a second sliding rod perpendicular to the first sliding rods. The clamping part includes two parallel first clamping rods and a second clamping rod perpendicular to the first clamping rods. One of the first sliding rods of the sliding part passes through a through hole of a sliding frame, and one end of the other first sliding rod is connected to one end of the first clamping rod.
[0014] When the clamping soft finger is in the open state, the clamping part is located in the internal space formed by the U-shaped mounting plate; when the clamping soft finger is in the closed state, the second clamping rod is pressed against the surface of the object being clamped.
[0015] As a preferred technical solution, one end of the conveyor chain is the loading end and the other end is the unloading end. The open guide plate is located on the side of the clamped object closer to the unloading end; the closed guide plate is located on the side of the clamped object closer to the loading end.
[0016] As a preferred technical solution, one side of the closed guide plate is fixed on the support rail, and the other side extends to the side of the base away from the object being clamped; one side of the open guide plate is fixed on the support rail, and the other side extends to the side of the base close to the object being clamped.
[0017] As a preferred technical solution, the positioner is a ball-head plunger positioner.
[0018] As a preferred technical solution, the clamping soft finger (31) includes a clamping part (310) for clamping the object being clamped, and the clamping part (310) is a clamping part (310) made of elastomeric material.
[0019] As a preferred technical solution, there are two support rails, located on both sides of the object being clamped.
[0020] Compared with the prior art, the present invention has the following beneficial effects.
[0021] 1) This utility model installs multiple clamping mechanisms on the conveyor chain to clamp the objects on the conveyor chain, ensuring the stability of the clamped objects throughout the conveying process; for example, when the conveyor chain conveys PCB boards, the clamping mechanisms can prevent the PCB boards from warping or shifting; the clamping soft fingers have a certain elasticity, and when in contact with the clamped objects, they can both press the clamped objects firmly and adapt to objects of different thicknesses; the open guide plate and the close guide plate are installed on the support guide rail according to the opening and closing requirements of the clamping mechanism, so that the working state of the clamping mechanism can be changed without manual operation, making it convenient to use.
[0022] 2) The base of this utility model is fixed to the pin of the conveyor chain by the mounting plate, which ensures the synchronization of the movement of the clamping mechanism and the conveyor chain, thereby ensuring that the position of the clamped object will not change; no additional fixing structure is required, and when there is a clamping requirement, it is easy to install the clamping mechanism on the existing conveyor chain of the equipment at a low cost; the clamping soft finger is positioned by the positioner, and the clamping mechanism can be kept in working state by opening and closing the guide plate in one operation.
[0023] 3) The U-shaped clamping part of this utility model clamps the object through the second clamping rod, with a large contact area and stable clamping; the specific structure for clamping the soft finger realizes the effect of sliding to change the working state.
[0024] 4) The closed guide plate of this utility model is located at the feeding end, which closes the clamping mechanism and fixes the object transmitted from the feeding end in time. The open guide plate is located at the unloading end, which opens the clamping mechanism and allows the object to smoothly reach the next position.
[0025] 5) This utility model adopts a ball-head plunger positioner, which can adjust the preload and achieve positioning by controlling the screw-in depth; the clamping part of the clamping soft finger is made of an elastomer material, which has both a certain hardness and a certain elasticity, and can produce a moderate deformation when in contact with the product; two support guide rails ensure uniform clamping of the object. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of a reflux furnace conveying device with clamping function according to the present invention.
[0027] Figure 2 This is a schematic diagram of the clamping mechanism of this utility model.
[0028] Figure 3 This is an exploded view of the clamping mechanism of this utility model.
[0029] Figure 4 This is a schematic diagram of the clamping mechanism of this utility model in the open state.
[0030] Figure 5 This is a schematic diagram of the clamping mechanism of this utility model in a closed state.
[0031] The numbers in the diagram are as follows:
[0032] 1. Support rail; 2. Conveyor chain; 3. Clamping mechanism; 30. Base; 300. Mounting plate; 3000. First mounting plate; 3001. Second mounting plate; 301. Sliding frame; 3010. Through hole; 3011. Limiting hole; 31. Clamping soft finger; 310. Clamping part; 3100. First clamping rod; 3101. Second clamping rod; 311. Sliding part; 3110. First sliding rod; 31100. First groove; 31101. Second groove; 3111. Second sliding rod; 32. Positioner; 4. Open guide plate; 5. Close guide plate. Detailed Implementation
[0033] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.
[0034] like Figure 1 As shown, this utility model provides a reflow oven conveyor device with clamping function, which can be used to clamp PCB boards, including a support guide rail 1, a conveyor chain 2, a clamping mechanism 3, an open guide plate 4, and a closed guide plate 5.
[0035] There are two support rails, located on both sides of the PCB board.
[0036] There are two conveyor chains 2, each fixed on a support rail 1.
[0037] like Figure 2 As shown, the clamping mechanism 3 includes a base 30, a clamping soft finger 31, and a positioner 32.
[0038] The base 30 includes a mounting plate 300 and a sliding bracket 301.
[0039] like Figure 3 As shown, the mounting plate 300 is U-shaped, including two parallel first mounting plates 3000 and a second mounting plate 3001 perpendicular to the two first mounting plates 3000. The second mounting plate 3001 passes through the pin of the conveyor chain 2. The outer chain plate of the conveyor chain 2 is installed on one side of the mounting plate 300, fixing the mounting plate 300 to the conveyor chain 2, thereby fixing the clamping mechanism 3 to the conveyor chain 2. The number and installation spacing of the clamping mechanism 3 can be determined according to actual needs. There are two sliding frames 301. The two ends of the second mounting plate 3001 are respectively connected to one end of the first mounting plate 3000; one end of the first mounting plate 3000 is connected to one end of the second mounting plate 3001, and the other end is equipped with the sliding frame 301.
[0040] The sliding frame 301 is a cuboid with a through hole 3010 and a limiting hole 3011 with mutually perpendicular axes. The axis of the through hole 3010 is perpendicular to the conveyor chain 2. One end of the clamping soft finger 31 passes through the through hole 3010, and the positioner 32 passes through the limiting hole 3011 and abuts against the clamping soft finger 31.
[0041] The clamping soft finger 31 includes a clamping part 310, both of which are U-shaped, and two sliding parts 311. One sliding part 311 passes through a sliding frame 301. The sliding part 311 includes two parallel first sliding rods 3110 and a second sliding rod 3111 perpendicular to the first sliding rods 3110. The clamping part 310 includes two parallel first clamping rods 3100 and a second clamping rod 3101 perpendicular to the first clamping rods 3100. One of the first sliding rods 3110 of the sliding part 311 passes through a through hole 3010 of a sliding frame 301 and has a first groove 31100 and a second groove 31101. The first groove 31100 is close to the PCB board. When the clamping soft finger 31 is in the open state, the locator 32 abuts against the first groove 31100. When the clamping soft finger 31 is in the closed state, the locator 32 abuts against the second groove 31101. One end of the other first sliding rod 3110 is connected to one end of the first clamping rod 3100. The two ends of the second clamping rod 3101 are respectively connected to one end of the first clamping rod 3100. When the clamping soft finger 31 is in the closed state, the second clamping rod 3101 is pressed on the surface of the edge of the PCB board.
[0042] The clamping part 310 of the clamping soft finger 31 is made of an elastomer material, possessing both strength and elasticity. Its material properties and thermal expansion coefficient are matched to the circuit board material, improving the accuracy of the clamping position and maintaining stability in high-temperature environments (such as reflow soldering environments). When in contact with the PCB board, it can appropriately press the board and accommodate PCB boards of different thicknesses. This ensures the stability of the PCB board throughout the entire transport process, preventing warping or displacement.
[0043] Positioner 32 can be a ball plunger positioner 32. The ball plunger, also known as a spring plunger, has a spring installed inside the thread. The preload is adjusted by controlling the screw-in depth to achieve the positioning function.
[0044] The open guide plate 4 is L-shaped, with one side fixed to the support guide rail 1 and the other side extending to the side of the sliding frame 301 near the PCB board. When the clamping mechanism 3 passes the open guide plate 4, the open guide plate 4 pushes the clamping part 310 of the clamping soft finger 31 to move away from the PCB board, the sliding part 311 slides along the through hole 3010 in the sliding frame 301, the second clamping rod 3101 leaves the surface of the PCB board, and the PCB board is transported to downstream equipment, such as... Figure 4 As shown.
[0045] The closed guide plate 5 is L-shaped, with one side fixed to the support rail 1 and the other side extending to the base 30 away from the side of the PCB board being clamped. When the clamping mechanism 3 passes the closed guide plate 5, the closed guide plate 5 pushes the sliding part 311 of the clamping soft finger 31 to move in the direction closer to the PCB board. The second clamping rod 3101 reaches the surface of the PCB board and clamps the PCB board, thus clamping and fixing the PCB board. Figure 5 As shown.
[0046] During PCB soldering in a reflow oven, displacement, warping, or deformation of the PCB during transport can significantly impact product yield. This is especially true within a vacuum chamber, where negative pressure further exacerbates displacement, warping, or deformation, affecting soldering quality – a persistent problem in the industry. This invention effectively solves this problem. The clamping mechanism 3, the opening guide plate 4, and the closing guide plate 5 of this invention can be directly installed on the chain of existing equipment. It requires fewer parts, has lower manufacturing difficulty, and upgrades to each set of equipment require minimal cost, resulting in high user acceptance.
[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A reflux furnace conveying device with clamping function, characterized in that, It includes a support rail (1), a conveyor chain (2), multiple clamping mechanisms (3), an open guide plate (4) and a closed guide plate (5). The conveyor chain (2) is mounted on the support rail (1), and the object to be clamped is placed on the pin of the conveyor chain (2). The clamping mechanism (3) includes a base (30), a clamping soft finger (31), and a locator (32). The base (30) is fixed on the pin of the conveying chain (2). The clamping soft finger (31) is slidably mounted on the base (30) through the locator (32). The sliding direction of the clamping soft finger (31) is perpendicular to the conveying direction of the conveying chain (2). The open guide plate (4) and the close guide plate (5) are installed at different positions on the support rail (1). When the open guide plate (4) abuts against the clamping soft finger (31), the clamping soft finger (31) is in the open state and away from the clamped object. When the close guide plate (5) abuts against the clamping soft finger (31), the clamping soft finger (31) is in the closed state and abuts against the edge of the clamped object.
2. The reflux furnace conveying device with clamping function according to claim 1, characterized in that, The base (30) includes a mounting plate (300) and a sliding frame (301). One end of the mounting plate (300) passes through the pin of the conveyor chain (2), and the outer chain plate of the conveyor chain (2) is fixed to one side of the mounting plate (300). The sliding frame (301) is mounted on the other end of the mounting plate (300). The sliding frame (301) is provided with a through hole (3010) and a limiting hole (3011) with mutually perpendicular axes. The axis of the through hole (3010) is perpendicular to the conveyor chain (2). One end of the clamping soft finger (31) passes through the through hole (3010), and the locator (32) passes through the limiting hole (3011) and abuts against the clamping soft finger (31).
3. A reflux furnace conveying device with clamping function according to claim 2, characterized in that, The clamping soft finger (31) has a first groove (31100) and a second groove (31101) at one end of the limiting hole (3011). The first groove (31100) is close to the object being clamped. When the clamping soft finger (31) is in the open state, the locator (32) abuts against the first groove (31100). When the clamping soft finger (31) is in the closed state, the locator (32) abuts against the second groove (31101).
4. A reflux furnace conveying device with clamping function according to claim 2, characterized in that, The mounting plate (300) is U-shaped and includes two parallel first mounting plates (3000) and a second mounting plate (3001) perpendicular to the first mounting plate (3000). The second mounting plate (3001) passes through the pin of the conveyor chain (2). One end of each of the two first mounting plates (3000) is connected to one end of the second mounting plate (3001), and a sliding frame (301) is installed at the other end of each.
5. A reflux furnace conveying device with clamping function according to claim 4, characterized in that, The clamping soft finger (31) includes a clamping part (310) that is U-shaped and two sliding parts (311). The sliding part (311) includes two parallel first sliding rods (3110) and a second sliding rod (3111) perpendicular to the first sliding rods (3110). The clamping part (310) includes two parallel first clamping rods (3100) and a second clamping rod (3101) perpendicular to the first clamping rods (3100). One of the first sliding rods (3110) of the sliding part (311) passes through a through hole (3010) of a sliding frame (301), and one end of the other first sliding rod (3110) is connected to one end of the first clamping rod (3100). When the clamping soft finger (31) is in the open state, the clamping part (310) is located in the internal space formed by the U-shaped mounting plate (300); When the clamping soft finger (31) is in the closed state, the second clamping rod (3101) presses against the surface of the clamped object.
6. A reflux furnace conveying device with clamping function according to claim 1, characterized in that, The conveyor chain (2) has a loading end at one end and a unloading end at the other end. The open guide plate (4) is located on the side of the clamped object closer to the unloading end; the closed guide plate (5) is located on the side of the clamped object closer to the loading end.
7. A reflux furnace conveying device with clamping function according to claim 1, characterized in that, The closed guide plate (5) is fixed on one side of the support rail (1) and extends to the base (30) away from the object being clamped; the open guide plate (4) is fixed on one side of the support rail (1) and extends to the base (30) near the object being clamped.
8. A reflux furnace conveying device with clamping function according to claim 1, characterized in that, The positioner (32) is a ball-head plunger positioner (32).
9. A reflux furnace conveying device with clamping function according to claim 1, characterized in that, The clamping soft finger (31) includes a clamping part (310) for clamping the object being clamped, and the clamping part (310) is a clamping part (310) made of elastomeric material.
10. A reflux furnace conveying device with clamping function according to claim 1, characterized in that, The support rails (1) consist of two rails, located on both sides of the object being clamped.