A welding fixture for a sensor

Abstract

This utility model discloses a welding fixture for sensors, belonging to the field of welding fixture technology. The welding fixture includes a fixture body, a controller mounted on the front outer wall of the fixture body, a fixing plate mounted on the left outer wall of the fixture body, a positioning component connected to the output end of an electric push rod for pressing and positioning the circuit board, a connecting cylinder and a connecting plate mounted on the right outer wall of the fixture body, and a gas purification component mounted on the rear outer wall of the fixture body for purifying harmful welding gases. This component can fit the edges of circuit boards of different shapes and facilitates mass production of circuit boards of the same shape, improving efficiency. Furthermore, harmful gases and fumes generated during welding are drawn in through a through-hole, sent to an activated carbon filter plate for filtration via a gas guide channel, and the purified air is discharged into the workshop, reducing irritation to operators.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, and more specifically, to a welding fixture for a sensor. Background Technology

[0002] A sensor welding fixture is a specialized tooling fixture used in the sensor welding process. Its core function is to accurately position, stably clamp, and reliably support the sensor and its components to be welded (such as pins, bases, circuit boards, etc.) to ensure that the positions of each component are accurate and relatively fixed during welding, thereby reducing welding deviations, ensuring welding quality (such as weld strength, conductivity, and sealing), and improving welding efficiency and ease of operation.

[0003] Existing sensor welding fixtures typically require clamps to position and hold the circuit board during the sensor welding process. However, the circuit boards often have varying shapes, some being regular rectangles, others with irregular notches, and still others with curved edges. This makes it difficult for universal clamps to perfectly fit the different shapes of the circuit boards during subsequent positioning and clamping. This can result in either unstable clamping and circuit board wobbling during welding, affecting welding accuracy, or excessive clamping leading to deformation and damage of the circuit board. This problem is particularly prominent for thin, flexible circuit boards, undoubtedly causing significant inconvenience in practical use.

[0004] Secondly, during welding, whether it is the fumes produced by the melting of solder during tin soldering or the gases released by the high-temperature reaction of materials in processes such as laser welding, they all contain harmful substances such as rosin and metal oxides. These gases are easily dispersed in the air, which not only produces a pungent smell, but also poses potential hazards to the respiratory tract and physical health of operators, bringing dual hidden dangers to the production environment and personnel safety.

[0005] In view of this, we propose a welding fixture for sensors. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] The purpose of this invention is to provide a welding fixture for sensors to solve the problems mentioned in the background art.

[0008] 2. Technical Solution

[0009] A welding fixture for a sensor includes a fixture body, a controller disposed on the front outer wall of the fixture body, a fixing plate disposed on the left outer wall of the fixture body, an electric push rod disposed on the outer wall of the fixing plate, a positioning component for pressing and positioning a circuit board being connected to the output end of the electric push rod, a connecting cylinder and a connecting plate disposed on the right outer wall of the fixture body, and a gas purification component for purifying harmful welding gases disposed on the rear outer wall of the fixture body.

[0010] Preferably, the positioning component includes a pressure plate installed at the output end of the electric push rod. The outer wall of the pressure plate is provided with a connecting cylinder and a connecting plate. A plurality of connecting cylinders are movably sleeved with pressure columns, and the ends of the plurality of pressure columns are connected with rubber pads.

[0011] Preferably, the plurality of pressure columns extend to the outside of the right side of the pressure plate, the left end of the plurality of pressure columns is connected to an iron rod, the plurality of iron rods extend to the outside of the left side of the plurality of connecting cylinders, and a spring is also provided inside the plurality of connecting cylinders, the spring being located between the pressure column and the inner wall of the left side of the connecting cylinder.

[0012] Preferably, an electromagnet plate is provided at the bottom of the connecting plate, and a metal plate is provided at the bottom of the electromagnet plate. The bottom of the metal plate has an arc groove that matches the iron rod.

[0013] Preferably, the plurality of connecting cylinders two and connecting cylinder one have the same structure, and the connecting plate two has the same structure as the connecting plate one.

[0014] Preferably, the inner wall of the fixture body has a through hole, and the gas purification component includes a connecting cover installed on the outer wall of the rear of the fixture body. A snap-fit ​​plate is snapped onto the top of the connecting cover, and an activated carbon filter plate is fixedly connected to the bottom of the snap-fit ​​plate. A suction pipe is provided on the outer wall of the connecting cover, and the suction pipe communicates with the inside of the connecting cover.

[0015] 3. Beneficial effects

[0016] Compared to existing technologies, the advantages of this invention are as follows: In actual use, the operator first places the circuit board stably on the support platform inside the fixture body. Then, the controller controls the electric push rod, and the piston rod of the push rod extends smoothly, driving the pressure plate connected to the end to move towards the circuit board. During the clamping and positioning process, the multiple connecting cylinders 1 distributed on the pressure plate work together with the connecting cylinders 2 on the right outer wall of the fixture body. The pressure columns inside, driven by the elastic potential energy of the spring, can adaptively extend and retract according to the actual contour of the circuit board edge. When facing the right-angled edge of a rectangular plate, the corresponding pressure column will remain stably extended. When encountering irregular notches or curved edges, the pressure column at the notch will be... The compression retracts while the pressure post at the arc-shaped fitting point extends appropriately, thus achieving a tight fit between the edges of various shaped circuit boards. This avoids problems such as local overpressure or loose clamping. Once the pressure post is fully fitted with the edge of the circuit board, multiple electromagnet plates can be activated via the controller. The energized electromagnet plates generate a strong magnetic force, which quickly magnetically attracts and fixes the pressure post made of magnetically conductive material, keeping the pressure post in its current extended state. This design not only ensures the stability of the circuit board during subsequent soldering but also enables rapid saving of the tooling state. When mass production of circuit boards of the same shape is required, there is no need for repeated adjustments; the saved clamping parameters can be directly called, significantly shortening changeover time and greatly improving production efficiency.

[0017] To address the harmful gases generated during welding, an external exhaust fan connected to the connecting cover behind the fixture can be turned on before the welding process begins. The operation of the exhaust fan creates a stable negative pressure environment inside the connecting cover. Multiple array-shaped through holes are opened at the positions corresponding to the welding area of ​​the connecting cover. When fumes and harmful gases are generated during welding, these pollutants are quickly drawn into the through holes under the negative pressure and transported to the activated carbon filter plate through the air guide channel inside the connecting cover. This effectively adsorbs harmful substances such as rosin and metal oxides in the gas. The filtered clean air is then discharged into the workshop, reducing the irritation of pungent odors to operators from the source, effectively improving the working environment, and reducing health hazards. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the pressure plate structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the connecting cover structure of this utility model;

[0021] Explanation of the numbers in the diagram: 100, main body of the fixture; 110, controller; 120, fixing plate; 130, electric push rod; 140, pressure plate; 141, connecting cylinder one; 142, iron rod; 143, pressure column; 144, rubber pad; 145, spring; 146, connecting plate one; 147, electromagnet plate; 148, metal plate; 150, connecting cylinder two; 160, connecting plate two; 170, through hole; 200, connecting cover; 210, snap-fit ​​plate; 220, activated carbon filter plate; 230, suction tube. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please see Figure 1-3 This utility model provides a technical solution:

[0026] A welding fixture for a sensor includes a fixture body 100, a controller 110 disposed on the front outer wall of the fixture body 100, a fixing plate 120 disposed on the left outer wall of the fixture body 100, an electric push rod 130 disposed on the outer wall of the fixing plate 120, a positioning component for pressing and positioning a circuit board being connected to the output end of the electric push rod 130, a connecting cylinder 150 and a connecting plate 160 disposed on the right outer wall of the fixture body 100, and a gas purification component for purifying harmful welding gases disposed on the rear outer wall of the fixture body 100.

[0027] Specifically, the positioning component includes a pressure plate 140 installed at the output end of the electric push rod 130. The outer wall of the pressure plate 140 is provided with a connecting cylinder 141 and a connecting plate 146. Multiple connecting cylinders 141 are movably sleeved with pressure columns 143. The ends of multiple pressure columns 143 are connected with rubber pads 144 to facilitate buffering and clamping of the circuit board.

[0028] Furthermore, multiple pressure columns 143 extend to the outside of the right side of the pressure plate 140, and iron rods 142 are connected to the left ends of the multiple pressure columns 143. The multiple iron rods 142 extend to the outside of the left side of the multiple connecting cylinders 141. Springs 145 are also provided inside the multiple connecting cylinders 141, and the springs 145 are located between the pressure columns 143 and the inner left side wall of the connecting cylinders 141.

[0029] Furthermore, an electromagnet plate 147 is provided at the bottom of the connecting plate 146, and a metal plate 148 is provided at the bottom of the electromagnet plate 147. The bottom of the metal plate 148 has an arc groove that matches the iron rod 142.

[0030] In some embodiments, the electromagnet plate 147 is a key structure in the fixture that works in conjunction with the pressure column to achieve clamping and fixing. It consists of an iron core and a coil wound around the outside. When the controller issues a power-on command, current flows through the coil. According to the principle of electromagnetic induction, the iron core is magnetized to generate a strong magnetic force, thereby forming a magnetic adsorption on the pressure column made of magnetically conductive material. This firmly fixes the pressure column 140 in the self-adjusted position, preventing the pressure column from shifting due to external force during the welding process. When it is necessary to loosen or readjust, the coil current is cut off, the magnetic force disappears, and the pressure column 140 can freely extend and retract again under the action of the spring 145, flexibly adapting to circuit boards of different shapes.

[0031] Furthermore, multiple connecting cylinders 150 and 141 have the same structure, and connecting plate 160 has the same structure as connecting plate 146.

[0032] It is worth noting that the inner wall of the fixture body 100 has a through hole 170. The gas purification component includes a connecting cover 200 installed on the outer wall of the rear of the fixture body 100. A snap-fit ​​plate 210 is snapped onto the top of the connecting cover 200. An activated carbon filter plate 220 is fixedly connected to the bottom of the snap-fit ​​plate 210. A suction pipe 230 is provided on the outer wall of the connecting cover 200. The suction pipe 230 communicates with the inside of the connecting cover 200.

[0033] In some embodiments, the suction pipe 230 is connected to the exhaust end of an external exhaust fan. The exhaust fan is existing technology and need not be described in detail. A common model on the market can be selected. The device is controlled by a controller 110, which is a PLC controller. The device can be powered by an external power supply.

[0034] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0035] Working principle: In actual use, the operator first places the circuit board stably on the support platform inside the fixture body 100. Then, the controller 110 controls the electric push rod 130, and the piston rod of the push rod extends smoothly, driving the pressure plate 140 connected to the end to move towards the circuit board. During the clamping and positioning process, the multiple connecting cylinders 141 distributed on the pressure plate 140 work together with the connecting cylinders 150 on the right outer wall of the fixture body 100. The pressure column 143 inside, driven by the elastic potential energy of the spring 145, can adjust according to the actual contour of the edge of the circuit board. The device features adaptive expansion and contraction. When facing the right-angled edge of a rectangular board, the corresponding pressure post 140 remains stably extended. When encountering irregular notches or curved edges, the pressure post 140 at the notch is compressed and retracted, while the pressure post at the curved fitting area extends moderately. This achieves tight fitting of the edges of various shaped circuit boards, avoiding problems such as local overpressure or loose clamping. Once the pressure post 140 is fully fitted with the edge of the circuit board, multiple electromagnet plates 147 can be activated via the controller 110. The energized electromagnet plates 147 generate a strong magnetic force, rapidly applying pressure to the edge of the circuit board made of magnetically conductive material. The forming pressure column 140 is magnetically adsorbed and fixed, maintaining its current extension and contraction state. This design not only ensures the stability of the circuit board during subsequent welding but also enables rapid saving of the tooling state. When mass production of circuit boards of the same shape is required, there is no need for repeated adjustments; the saved clamping parameters can be directly recalled, significantly shortening changeover time and greatly improving production efficiency. Regarding the harmful gases generated during welding, an external exhaust fan connected to the connecting cover 200 behind the fixture can be turned on before the welding process begins. The operation of the exhaust fan vents the interior of the connecting cover 200. To create a stable negative pressure environment, the connecting cover 200 has multiple array-shaped through holes 170 at the positions corresponding to the welding area. When fumes and harmful gases are generated during the welding process, these pollutants are quickly drawn into the through holes 170 under negative pressure and transported to the activated carbon filter plate 220 through the air guide channel inside the connecting cover 200. This allows for efficient adsorption of harmful substances such as rosin and metal oxides in the gas. The filtered clean air is then discharged into the workshop, reducing the irritation of pungent odors to operators from the source, effectively improving the working environment and reducing health hazards.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for a sensor, comprising a fixture body (100), characterized in that: A controller (110) is provided on the front outer wall of the fixture body (100), a fixing plate (120) is provided on the left outer wall of the fixture body (100), an electric push rod (130) is provided on the outer wall of the fixing plate (120), and a positioning component for pressing and positioning the circuit board is connected to the output end of the electric push rod (130). A connecting cylinder two (150) and a connecting plate two (160) are provided on the right outer wall of the fixture body (100), and a gas purification component for purifying welding harmful gases is provided on the rear outer wall of the fixture body (100).

2. The welding fixture for a sensor according to claim 1, characterized in that: The positioning component includes a pressure plate (140) installed at the output end of the electric push rod (130). The outer wall of the pressure plate (140) is provided with a connecting cylinder (141) and a connecting plate (146). A plurality of connecting cylinders (141) are movably sleeved with pressure columns (143), and the ends of the plurality of pressure columns (143) are connected with rubber pads (144).

3. The welding fixture for a sensor according to claim 2, characterized in that: Multiple pressure columns (143) extend to the outside of the right side of the pressure plate (140). The left end of the multiple pressure columns (143) is connected to an iron rod (142). The multiple iron rods (142) extend to the outside of the left side of the multiple connecting cylinders (141). A spring (145) is also provided inside the multiple connecting cylinders (141). The spring (145) is located between the pressure column (143) and the inner left side wall of the connecting cylinder (141).

4. The welding fixture for a sensor according to claim 3, characterized in that: The bottom of the connecting plate (146) is provided with an electromagnet plate (147), and the bottom of the electromagnet plate (147) is provided with a metal plate (148). The bottom of the metal plate (148) is provided with an arc groove that matches the iron rod (142).

5. The welding fixture for a sensor according to claim 4, characterized in that: The connecting cylinders 2 (150) and 1 (141) have the same structure, and the connecting plate 2 (160) has the same structure as the connecting plate 1 (146).

6. The welding fixture for a sensor according to claim 5, characterized in that: The inner wall of the fixture body (100) is provided with a through hole (170). The gas purification component includes a connecting cover (200) installed on the outer wall of the rear of the fixture body (100). A snap-fit ​​plate (210) is snapped onto the top of the connecting cover (200). An activated carbon filter plate (220) is fixedly connected to the bottom of the snap-fit ​​plate (210). A suction pipe (230) is provided on the outer wall of the connecting cover (200). The suction pipe (230) communicates with the inside of the connecting cover (200).

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