Automatic SMT reflow soldering furnace equipment

Abstract

The utility model discloses automatic SMT (Surface Mount Technology) reflow soldering furnace equipment which comprises a base, a soldering furnace is arranged on the base, a plurality of transmission rollers are rotationally arranged in the top end of the base, the transmission rollers are in transmission connection with the same conveyor belt, a first motor is connected to the transmission roller at the tail end, a second motor is arranged on one side of the base, and the first motor and the second motor are in transmission connection. The output end of the second motor is connected with a two-way screw rod, the two-way screw rod is in threaded connection with a first sliding block and a second sliding block respectively, the two-way screw rod is controlled by the second motor to rotate, so that the first sliding block and the second sliding block synchronously and relatively move, and the two movable frames are driven to synchronously move; and the transmission rollers are controlled by the first motor to rotate, so that the positioned circuit boards are conveyed by the conveying belt, the circuit boards of the same specification are conveyed and welded, and arrangement and classification after welding are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of reflow soldering technology, and in particular to an automated SMT reflow soldering oven. Background Technology

[0002] Reflow soldering is an assembly process for printed circuit board (PCB) components and a preliminary step in various environmental tests. Reflow soldering equipment contains a heating circuit that heats air or nitrogen to a sufficiently high temperature and blows it onto the PCB with components already mounted, melting the solder on both sides of the components and bonding them to the motherboard. The advantages of this process are easy temperature control, prevention of oxidation during soldering, and easier cost control. As a crucial soldering device in surface mount technology, reflow soldering can perform soldering of tens of thousands of solder joints in a short time, achieving electrical connections between the PCB and components. The main reflow soldering process parameter is the control of the reflow temperature. Different PCB components require extensive experience and numerous tests to adjust the reflow oven parameters and obtain the required reflow temperature, a process that consumes significant manpower, resources, and time.

[0003] Existing reflow ovens typically place circuit boards of different specifications directly on a conveyor belt for soldering, which makes it difficult to sort and classify them later. Furthermore, existing reflow ovens are not easy to adjust for overall level, which can lead to incomplete and uneven soldering. Therefore, an automated SMT reflow oven is needed to meet these requirements. Utility Model Content

[0004] The purpose of this invention is to provide an automated SMT reflow oven to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automated SMT reflow oven equipment, comprising a base, on which a reflow oven is mounted; a plurality of transmission rollers are rotatably mounted at the top of the base, and the same conveyor belt is connected to the plurality of transmission rollers; a first motor is connected to the transmission roller at the end; a second motor is mounted on one side of the base; a bidirectional lead screw is connected to the output end of the second motor; a first slider and a second slider are threadedly connected to the bidirectional lead screw; a movable frame is mounted at the top of both the first slider and the second slider; the two movable frames are both located above the conveyor belt and are distributed parallel to each other; a plurality of connecting blocks are mounted at the bottom of the base; a screw is threadedly connected to the bottom of each connecting block; a worm gear is connected to the bottom of the screw; a pad is mounted below each connecting block; a worm is rotatably mounted on one side of the pad; a handwheel is connected to the worm; the worm and the worm gear mesh with each other.

[0006] Preferably, the first slider has a positive thread hole that matches the positive thread section of the bidirectional lead screw, and the second slider has a negative thread hole that matches the negative thread section of the bidirectional lead screw.

[0007] Preferably, a number of pulleys are rotatably installed inside the mobile frame.

[0008] Preferably, a guide rod is provided at the top of the base, the guide rod is parallel to the bidirectional lead screw, and two guide blocks are slidably installed on the guide rod. The two guide blocks are respectively installed below the ends of the two movable frames away from the first slider and the second slider.

[0009] Preferably, a threaded hole is provided at the bottom end of the connecting block, and the screw is threaded into the threaded hole.

[0010] Preferably, a support shaft is provided at the bottom end of the worm gear, and the support shaft is rotatably mounted inside the pad.

[0011] Preferably, a U-shaped frame is provided on one outer wall of the pad, and the worm gear is rotatably installed in the U-shaped frame.

[0012] The beneficial effects of this utility model are:

[0013] In this invention, a second motor controls the rotation of a bidirectional lead screw, causing the first and second sliders to move synchronously relative to each other. This drives two moving frames to move synchronously, thereby positioning both sides of the circuit board. The first motor controls the rotation of the transmission rollers, causing the conveyor belt to transport the positioned circuit board. This enables the transport and welding of circuit boards of the same specifications, facilitating the sorting and classification after welding.

[0014] In this invention, rotating the handwheel causes the worm gear to rotate, which in turn drives the screw to rotate within the connecting block. This allows for adjustment of the distance between the pad and the connecting block, thereby changing the horizontal height of each corner of the base and achieving levelness adjustment. Furthermore, the cooperation between the worm gear and the worm wheel reduces the rotation speed of the screw, enabling fine-tuning of the levelness and improving adjustment accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an automated SMT reflow oven proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the moving frame structure of an automated SMT reflow oven equipment proposed in this utility model;

[0017] Figure 3 This is a top view cross-sectional diagram of the drive roller structure of an automated SMT reflow oven proposed in this utility model;

[0018] Figure 4 This is a side view sectional view of the worm gear structure of an automated SMT reflow oven proposed in this utility model;

[0019] Figure 5 This is a top view cross-sectional diagram of the worm gear structure of an automated SMT reflow oven proposed in this utility model.

[0020] In the diagram: 1. Base; 2. Welding furnace; 3. Drive roller; 4. Conveyor belt; 5. First motor; 6. Second motor; 7. Bidirectional lead screw; 8. First slider; 9. Second slider; 10. Moving frame; 11. Connecting block; 12. Screw; 13. Worm gear; 14. Pad block; 15. Worm; 16. Handwheel; 17. Pulley; 18. Guide rod; 19. Guide block; 20. Support shaft; 21. U-shaped frame. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5 An automated SMT reflow oven includes a base 1, on which a reflow oven 2 is mounted. Several drive rollers 3 are rotatably mounted at the top of the base 1, and a common conveyor belt 4 is connected to the drive rollers 3. A first motor 5 is connected to the drive roller 3 at its end. A second motor 6 is mounted on one side of the base 1, and a bidirectional lead screw 7 is connected to the output end of the second motor 6. A first slider 8 and a second slider 9 are threaded onto the bidirectional lead screw 7. A movable frame 10 is mounted at the top of both the first slider 8 and the second slider 9. The two movable frames 10 are located above the conveyor belt 4 and are parallel to each other. Several connecting blocks 11 are mounted at the bottom of the base 1. A screw 12 is threaded onto the bottom of each connecting block 11, and a worm gear 13 is connected to the bottom of the screw 12. A pad 14 is mounted below the connecting block 11, and a worm gear 15 is rotatably mounted on one side of the pad 14. A handwheel 16 is connected to the worm gear 15, and the worm gear 15 and the worm gear 13 mesh with each other.

[0023] The second motor 6 controls the bidirectional lead screw 7 to rotate, causing the first slider 8 and the second slider 9 to move synchronously relative to each other, thereby driving the two moving frames 10 to move synchronously, and thus positioning the two sides of the circuit board. The first motor 5 controls the transmission roller 3 to rotate, so that the conveyor belt 4 transports the positioned circuit board, thereby enabling the circuit boards of the same specifications to be transported and welded, which facilitates the sorting and classification after welding.

[0024] Rotating the handwheel 16 causes the worm gear 15 to drive the worm wheel 13 to rotate, and the worm wheel 13 drives the screw 12 to rotate within the connecting block 11, thereby adjusting the distance between the pad 14 and the connecting block 11, thus changing the horizontal height of each corner of the base 1, achieving the horizontality adjustment of the base 1, and effectively preventing the problem of uneven and incomplete soldering of the circuit board.

[0025] Specifically, in this embodiment, the first slider 8 has a positive thread hole that matches the positive thread section of the bidirectional lead screw 7, and the second slider 9 has a negative thread hole that matches the negative thread section of the bidirectional lead screw 7, so that the unidirectional rotation of the bidirectional lead screw 7 realizes the synchronous relative movement of the first slider 8 and the second slider 9.

[0026] Specifically, in this embodiment, a number of pulleys 17 are rotatably installed inside the movable frame 10, which makes the transport of the circuit board between the two movable frames 10 smoother.

[0027] Specifically, in this embodiment, a guide rod 18 is provided at the top of the base 1. The guide rod 18 is parallel to the bidirectional lead screw 7. Two guide blocks 19 are slidably installed on the guide rod 18. The two guide blocks 19 are respectively installed below the ends of the two movable frames 10 away from the first slider 8 and the second slider 9. The cooperation between the guide rod 18 and the guide blocks 19 makes the movable frame 10 move more smoothly.

[0028] Specifically, in this embodiment, a threaded hole is provided in the bottom end of the connecting block 11, and the screw 12 is threaded into the threaded hole, so that the screw 12 retracts within the connecting block 11 while rotating, thereby realizing the adjustment of the distance between the connecting block 11 and the pad 14.

[0029] Specifically, in this embodiment, a support shaft 20 is provided on the bottom end of the worm gear 13. The support shaft 20 is rotatably installed in the pad 14. The support shaft 20 lifts the bottom of the worm gear 13 to prevent the rotation of the worm gear 13 from being obstructed by the pad 14.

[0030] Specifically, in this embodiment, a U-shaped frame 21 is provided on one outer wall of the pad block 14, and the worm 15 is rotatably installed in the U-shaped frame 21. The U-shaped frame 21 provides positioning for the worm 15 on both sides, preventing axial displacement of the worm 15 and ensuring meshing between the worm 15 and the worm wheel 13.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An automated SMT reflow oven, comprising a base (1), characterized in that: A welding furnace (2) is provided on the base (1). Several transmission rollers (3) are rotatably installed inside the top of the base (1). The same conveyor belt (4) is connected to the several transmission rollers (3). A first motor (5) is connected to the transmission roller (3) at the end. A second motor (6) is provided on one side of the base (1). A bidirectional lead screw (7) is connected to the output end of the second motor (6). A first slider (8) and a second slider (9) are threadedly connected to the bidirectional lead screw (7). The top of the first slider (8) and the second slider (9) are respectively provided with There are two movable frames (10), both of which are located above the conveyor belt (4) and are distributed parallel to each other. Several connecting blocks (11) are provided on the bottom end of the base (1). Each connecting block (11) has a screw (12) threadedly connected to its bottom end. A worm gear (13) is connected to the bottom end of the screw (12). A pad (14) is provided below the connecting block (11). A worm (15) is rotatably installed on one side of the pad (14). A handwheel (16) is connected to the worm (15). The worm (15) and the worm gear (13) mesh with each other.

2. The automated SMT reflow oven equipment according to claim 1, characterized in that: The first slider (8) has a positive thread hole that matches the positive thread section of the bidirectional lead screw (7), and the second slider (9) has a reverse thread hole that matches the reverse thread section of the bidirectional lead screw (7).

3. The automated SMT reflow oven equipment according to claim 1, characterized in that: The movable frame (10) is equipped with a number of pulleys (17) that rotate within it.

4. The automated SMT reflow oven equipment according to claim 1, characterized in that: The top of the base (1) is provided with a guide rod (18), which is parallel to the bidirectional lead screw (7). Two guide blocks (19) are slidably installed on the guide rod (18). The two guide blocks (19) are respectively installed below the ends of the two movable frames (10) away from the first slider (8) and the second slider (9).

5. The automated SMT reflow oven equipment according to claim 1, characterized in that: The bottom end of the connecting block (11) is provided with a threaded hole, and the screw (12) is threaded into the threaded hole.

6. The automated SMT reflow oven equipment according to claim 1, characterized in that: A support shaft (20) is provided on the bottom end of the worm gear (13), and the support shaft (20) is rotatably installed in the pad (14).

7. The automated SMT reflow oven equipment according to claim 1, characterized in that: A U-shaped frame (21) is provided on one side of the outer wall of the pad (14), and the worm gear (15) is rotatably installed in the U-shaped frame (21).

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