Circuit board welding preheating device

Abstract

The utility model belongs to the technical field of circuit board production, and particularly relates to a circuit board welding preheating device which comprises a workbench with a mounting frame at the top, a welding gun is inserted on the mounting frame, an electric sliding rail is arranged on the surface of the workbench, and a working plate is arranged on a rail seat of the electric sliding rail. Mounting cavities are formed in the two ends of the working plate in the length direction, and the interiors of the mounting cavities are divided into air inlet cavities and air exhaust cavities through partition plates provided with hot-air blowers. A plurality of groups of air inlet grooves are formed in the top surface of the working plate, each group of air inlet grooves are communicated with the air inlet cavity through an air duct formed in the working plate, and the air exhaust cavity is communicated with the outside. The circuit board welding device is simple in structure, the circuit board can be clamped, disassembled and assembled conveniently and rapidly, meanwhile, the circuit board can be preheated before welding, a board body is protected, and the welding quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit board production, and in particular relates to a circuit board welding preheating device. Background Art

[0002] The processing of printed circuit boards involves a large number of component soldering operations. On the one hand, the clamping tooling is inconvenient to use, either the clamping is unstable, causing the circuit board to move during the clamping process, or the upper assembly and separation operations are relatively complicated. On the other hand, there is a lack of a supporting preheating mechanism. Generally, soldering is used to connect the board circuit and component pins. However, the high soldering temperature and direct contact with the room temperature board can easily generate thermal stress. At the same time, preheating the board can also effectively improve the welding quality. Therefore, those skilled in the art have provided a circuit board soldering preheating device to solve the problems raised in the above background technology. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a circuit board welding preheating device. The utility model has a simple structure and is not only convenient for clamping and disassembling the circuit board, but also can preheat the circuit board before welding, protect the board body and improve the welding quality.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A circuit board welding preheating device comprises a workbench with a mounting frame on the top, a welding gun inserted into the mounting frame, an electric slide rail on the workbench surface, a work plate on the rail seat of the electric slide rail, mounting cavities at both ends of the work plate in the longitudinal direction, and the interior of the mounting cavity is divided into an air inlet chamber and an air exhaust chamber by a partition plate provided with a hot air blower;

[0006] The top surface of the work plate is equipped with a series of air inlet slots, each connected to an air inlet chamber via an internal air duct. The exhaust chamber, in turn, is connected to the outside world. Under the action of a hot air blower, air from the work plate surface flows from the air inlet slots through the air ducts into the air inlet chamber, ultimately exiting through the exhaust chamber. This creates negative pressure at the air inlet slots, enhancing the adhesion and retention of circuit boards placed on the work plate surface. Furthermore, the airflow is heated by the hot air blower and ultimately discharged from the exhaust chamber into the work plate space, preheating the circuit boards.

[0007] Preferably, guide rods are provided on both sides of the length direction of the working plate, and the two guide rods are slidably connected to two sliders, one of which is provided with a guide rod on the slider of the guide rod, and the other is rotatably provided with a threaded rod on the slider of the other guide rod. The limit plate of the vertical guide rod spans the working plate and one end is slidably matched with the corresponding guide rod, and the other end is screwed with the corresponding threaded rod through a preset screw hole.

[0008] Preferably, one of the two guide rods is provided with equally spaced limiting holes on its body, and a limiting pin is inserted into the slider that slidably engages with the limiting hole. By removing the limiting pin and separating it from the limiting hole, the limiting of the slider can be released. The slider can then slide along the guide rod to adjust the position of the two limiting plates, thereby achieving the effect of limiting the position of circuit boards of different sizes, thereby expanding the applicability of the device. At the same time, the height of the limiting plate can be adjusted by rotating the threaded rod to facilitate limiting the position of circuit boards of different thicknesses.

[0009] Preferably, an exhaust channel is provided inside the plate body of the limiting plate, and a plurality of exhaust holes connected to the exhaust channel are provided on the plate body of the limiting plate.

[0010] Preferably, a conduit is provided on both sides of the stop plate, one end of each conduit being connected to the exhaust passage, and the other end of each conduit being connected to the exhaust cavity of the mounting chamber. Hot air from the exhaust cavity can be injected into the exhaust passage through the conduit and then exhausted through the exhaust holes. The hot air exhausted through the exhaust holes preheats the environment surrounding the circuit board (rather than directly blowing onto the circuit board surface).

[0011] The working principle of the present invention is as follows: the circuit board to be welded is placed above the working plate, and the limit pin is removed to separate it from the limit hole to release the limit on the slider. The position of the two limit plates can be adjusted by sliding the slider along the surface of the guide rod, so as to achieve the effect of further limiting different circuit boards, thereby improving the scope of application of the device. The height of the limit plate can be adjusted by rotating the threaded rod to facilitate limiting circuit boards of different thicknesses. The setting of the electric slide rail can adjust the position of the working plate to facilitate subsequent welding operations.

[0012] Before soldering, activating the hot air blower allows the air around the circuit boards on the work surface to be directed into the air inlet chamber through the combined action of the air duct and air inlet slots. After being heated by the hot air blower, the air is finally injected into the exhaust duct through the exhaust chamber and duct, and then discharged through the exhaust holes. The air discharged through the exhaust holes preheats the environment surrounding the circuit boards (it does not directly blow on the board surface). At the same time, negative pressure is created under the boards to effectively limit their position. Of course, if the wind force is too strong and affects subsequent soldering, the hot air blower can be turned off after preheating is completed.

[0013] Compared with the existing technology, the utility model has the following advantages: the utility model has a simple structure, which is not only convenient for clamping and disassembling the circuit board, but also can preheat the circuit board before welding, protect the board body and improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the preheating device described in the specific embodiment;

[0015] Figure 2 This is a structural diagram of the working board described in the specific implementation method;

[0016] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the working plate described in the specific implementation method;

[0017] Figure 4 Schematic diagram of the structure of the guide rod according to the specific implementation method. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] See also Figure 1-Figure 4 A circuit board soldering preheating device includes a workbench 1 with a mounting frame 101 on the top, a welding gun 102 inserted into the mounting frame 101, an electric slide rail 201 on the workbench 1, a work plate 202 on the rail seat of the electric slide rail 201, mounting cavities 206 are provided at both ends of the work plate 202 in the longitudinal direction, and the interior of the mounting cavity is divided into an air inlet chamber and an air exhaust chamber by a partition plate 207 provided with a hot air blower 203;

[0020] The top surface of the working plate 202 is provided with a plurality of air inlet slots 205 , and each group of air inlet slots 205 is connected to the air inlet cavity through an air duct 204 provided inside the working plate 202 ;

[0021] Guide rods 216 are provided on both sides of the length direction of the working plate 202, and the two guide rods 216 are slidably connected to two sliders 218. One of the two guide rods 216 is provided with limit holes 217 arranged at equal intervals on the rod body, and its sliding slider 218 is inserted with a limit pin 2110 for inserting into the limit holes 217; the slider 218 of one of the two guide rods 216 is provided with a guide rod 219, and the slider 218 of the other guide rod 216 is rotatably provided with a threaded rod 213. The limit plate 211 of the vertical guide rod spans the working plate 202, and one end is slidably matched with the corresponding guide rod 219, and the other end is screwed with the corresponding threaded rod 218 through a preset screw hole;

[0022] An exhaust channel 214 is also provided inside the plate body of the limiting plate 211, and several exhaust holes 215 connected to the exhaust channel 214 are also provided on the plate body of the limiting plate 211. A duct 212 is provided on both sides of the limiting plate 211, one end of the duct 212 is connected to the exhaust channel 214, and the other end of the duct 212 is connected to the exhaust cavity of the installation cavity 206.

[0023] The working principle of this utility model is as follows:

[0024] Place the circuit board to be welded on top of the working plate 202, remove the limiting pin 2110 to separate it from the limiting hole 217 to release the limitation of the slider 218, and the position of the two limiting plates 211 can be adjusted by sliding the slider 218 along the surface of the guide rod 216, so as to achieve the effect of further limiting different circuit boards and improve the scope of application of the device. The height of the limiting plate 211 can be adjusted by rotating the threaded rod 213 to facilitate limiting circuit boards of different thicknesses. The setting of the electric slide rail 201 can adjust the position of the working plate 202 to facilitate subsequent welding operations.

[0025] Before soldering, hot air blower 203 is activated. Air from the circuit boards on the work surface is directed into the air inlet chamber through the combined action of air duct 204 and air inlet slot 205. After being heated by hot air blower 203, the air is finally injected into exhaust duct 214 through the exhaust chamber and duct 212, and then discharged through exhaust hole 215. The air discharged through the exhaust hole preheats the environment surrounding the circuit boards (it does not directly blow onto the circuit board surface). At the same time, negative pressure is created below the circuit boards to effectively limit their position.

Claims

1. A circuit board welding preheating device, comprising a workbench (1) with a mounting frame (101) provided on the top, a welding gun (102) inserted into the mounting frame (101), characterized in that: The workbench (1) is provided with an electric slide rail (201) on its surface, and a work plate (202) is provided on the rail seat of the electric slide rail (201). The work plate (202) is provided with mounting cavities (206) at both ends in the longitudinal direction, and the interior of the mounting cavity is divided into an air inlet cavity and an air exhaust cavity by a partition plate (207) provided with a hot air blower (203); The top surface of the working plate (202) is provided with a plurality of air inlet slots (205), and each group of air inlet slots (205) is connected to the air inlet cavity through an air duct (204) provided inside the working plate (202), and the air exhaust cavity is connected to the outside.

2. The circuit board welding preheating device according to claim 1, characterized in that: Guide rods (216) are provided on both sides of the working plate (202) in the longitudinal direction. The two guide rods (216) are slidably connected to two sliders (218). A guide rod (219) is provided on the slider (218) of one guide rod (216), and a threaded rod (213) is rotatably provided on the slider (218) of the other guide rod (216). A limit plate (211) perpendicular to the guide rod spans the working plate (202) and one end is slidably matched with the corresponding guide rod (219), and the other end is screwed with the corresponding threaded rod (218) through a preset screw hole.

3. The circuit board welding preheating device according to claim 2, characterized in that: One of the two guide rods (216) is provided with limiting holes (217) arranged at equal intervals on the rod body, and a limiting pin (2110) for inserting into the limiting hole (217) is inserted into the sliding block (218) of the guide rod (216).

4. The circuit board welding preheating device according to claim 2, characterized in that: An exhaust channel (214) is also provided inside the plate body of the limiting plate (211), and a plurality of exhaust holes (215) communicating with the exhaust channel (214) are also provided on the plate body of the limiting plate (211).

5. The circuit board welding preheating device according to claim 4, characterized in that: A duct (212) is provided on both sides of the limiting plate (211), one end of the duct (212) is connected to the exhaust channel (214), and the other end of the duct (212) is connected to the exhaust cavity of the installation cavity (206).

Images