Welding positioning device for copper column electrode of miniature thermoelectric component

Abstract

The invention provides a welding positioning device for a copper column electrode of a miniature thermoelectric component, and belongs to the technical field of welding of miniature thermoelectric components. The device comprises an assembly positioning unit and an electrode positioning unit, the assembly positioning unit comprises a positioning seat, and the positioning seat is provided with a positioning groove and a limiting mechanism; the electrode positioning unit comprises a pressing block and a pressing plate assembly, and the pressing plate assembly is detachably connected with the positioning seat, is in clearance fit with the positioning groove and comprises a first pressing plate and a second pressing plate. The to-be-welded thermoelectric assembly is fixed through the assembly positioning unit, the copper column electrode is fixed through the electrode positioning unit, accurate positioning of the to-be-welded thermoelectric assembly and the electrode positioning unit is achieved, it is ensured that the to-be-welded thermoelectric assembly and the electrode positioning unit are kept stable in the welding process, and therefore the welding stability and quality are improved; the structure is simple, manufacturing is easy, operation is easy and convenient, welding operation difficulty can be reduced, and welding operation safety and welding efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding of micro-temperature difference electric components, and in particular relates to a welding positioning device for copper column electrodes of micro-temperature difference electric components. Background Art

[0002] Thermoelectric components are widely used in many fields due to their long life, no pollution, no noise, flexible installation and precise temperature control. As electronic devices gradually develop towards miniaturization, the space available for electronic device packaging is getting smaller and smaller, resulting in the miniaturization of thermoelectric cooling components. For example, in optical communication modules, optical chips are very sensitive to temperature. In order to achieve cooling and precise temperature control of optical communication modules in a small space, micro-thermoelectric components must be used. The micro-thermoelectric component includes an upper ceramic sheet, a lower ceramic sheet, a semiconductor element and a copper column electrode. The welding quality and positioning accuracy of the copper column electrode directly affect the performance and reliability of the micro-thermoelectric component. Due to the small size of the copper column electrode of the micro-thermoelectric component, the existing welding positioning device has the following problems:

[0003] (1) Insufficient positioning accuracy: The existing welding positioning device is difficult to accurately position the micro copper pillar electrode, resulting in welding position deviation, which affects the performance and reliability of the thermoelectric component.

[0004] (2) Poor welding stability: During the welding process, the micro copper pillar electrode is prone to displacement, rotation, and tilt, which makes the welding quality unable to be guaranteed and increases the risk of subsequent processes.

[0005] Therefore, it is urgently necessary to develop a device that can accurately position and fix the copper column electrodes of micro-thermoelectric components so that the copper column electrodes can be welded with high quality to improve the electrical performance and reliability of the micro-thermoelectric components and meet the development needs of the industry. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a welding positioning device for copper column electrodes of a micro-temperature difference electric component, which improves the positioning accuracy of the copper column electrodes and ensures the stability and quality of welding.

[0007] The technical solution adopted by the present invention is: a welding positioning device for copper column electrodes of a micro-temperature difference electric component, comprising:

[0008] The component positioning unit comprises a positioning seat, on which a positioning groove for positioning the temperature difference electric component to be welded and a limiting mechanism for pressing against the temperature difference electric component to be welded are provided;

[0009] The electrode positioning unit includes a pressing block for pressing the copper column electrode and a pressing plate assembly for fixing the pressing block and the copper column electrode. The pressing plate assembly is detachably connected to the positioning seat and cooperates with the positioning groove gap to facilitate welding equipment to perform welding operations through the gap between the two.

[0010] Furthermore, the shape of the positioning groove is adapted to the outer contour of the temperature difference electrical component to be welded, and a top end support structure is provided for cooperating with the limiting mechanism to limit the temperature difference electrical component to be welded.

[0011] Furthermore, the limiting mechanism includes a limiting top piece, a movable block and an elastic piece, one end of the elastic piece is connected to the positioning seat, and the other end is connected to the movable block; the limiting top piece is connected to the end of the movable block opposite to the elastic piece, and can press against the corner of the temperature difference electrical component to be welded under the action of the elastic piece.

[0012] Furthermore, the shape of the end portion of the limiting top piece is adapted to the corner portion of the temperature difference electrical component to be welded.

[0013] Furthermore, the positioning seat is also provided with a limiting groove, which is matched with the movable block and is used to limit the moving path and moving range of the movable block.

[0014] Furthermore, the movable block is also provided with a limiting pin, and the limiting groove is provided with a limiting hole matched with the limiting pin.

[0015] Furthermore, the movable block is also provided with a push rod for pushing the movable block to move.

[0016] Furthermore, the pressure plate assembly includes a first pressure plate and a second pressure plate, the first pressure plate is provided with a first positioning hole adapted to the copper column electrode; the second pressure plate is arranged above the second pressure plate, and is provided with a second positioning hole adapted to the pressure block; the second positioning hole is connected with the first positioning hole, and the size of the pressure block is larger than the copper column electrode.

[0017] Furthermore, the second pressing plate is further provided with a locking hole communicated with the second positioning hole, for fixing the pressing block via a positioning pin.

[0018] Furthermore, the positioning seat is also provided with a handle to facilitate the hand-held movement of the positioning seat.

[0019] The advantages and positive effects of the present invention are as follows: the present application fixes the to-be-welded temperature difference electric component by means of a component positioning unit, and fixes the copper pillar electrode by means of an electrode positioning unit, and the cooperation of the two realizes precise positioning of the to-be-welded temperature difference electric component and the electrode positioning unit; at the same time, by setting a limiting mechanism, the to-be-welded temperature difference electric component is stably fixed at the welding station, and by setting a pressure plate assembly, the copper pillar electrode is firmly fixed at the welding position, ensuring that the two remain stable during the welding process, preventing problems such as displacement, rotation and tilt, thereby improving the welding stability and welding quality; the present application has a simple structure and is easy to manufacture, which is not only easy to operate, but also helps to reduce the difficulty of welding operations, and improve the safety and efficiency of welding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a thermoelectric component of a specific embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a specific embodiment of the present invention;

[0022] Figure 3 is a top view of a specific embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of a positioning seat and a limiting mechanism of a specific embodiment of the present invention;

[0024] Figure 5 is a schematic structural diagram of a first pressing plate of a specific embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the second pressing plate structure of a specific embodiment of the present invention.

[0026] In the figure:

[0027] 1. Micro-thermoelectric component; 11. Upper ceramic sheet; 12. Lower ceramic sheet; 13. Semiconductor element; 14. Copper column electrode; 2. Positioning seat; 21. Positioning groove; 211. Top support structure; 212. Limiting angle; 22. Limiting mechanism; 221. Limiting top piece; 222. Movable block; 223. Elastic piece; 224. Limiting pin; 225. Push rod; 23. Limiting groove; 24. Handle; 3. Press plate assembly; 31. First press plate; 311. First positioning hole; 312. Groove; 32. Second press plate; 321. Second positioning hole; 322. Locking hole; 4. Press block. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0029] like Figure 1As shown, the present invention provides a micro-thermoelectric component copper column electrode welding positioning device, which is used to position and fix the micro-thermoelectric component 1 and the copper column electrode 14 to be welded respectively, so as to facilitate welding the two together, so as to solve the problems in the prior art that the copper column battery of the micro-thermoelectric component is difficult to position and has poor welding stability due to its small size.

[0030] In the embodiment of the present application, the specific structure of the micro thermoelectric component 1 is as follows: Figure 1 As shown, it includes an upper ceramic sheet 11, a lower ceramic sheet 12, a semiconductor element 13 and a copper column electrode 14, wherein the upper ceramic sheet 11 and the lower ceramic sheet 12 are used as an upper cover and a lower cover respectively, and the semiconductor element 13 is located between the two to achieve the thermoelectric effect; the copper column electrode 14 is arranged on the extended end of the lower ceramic sheet 12, and its bottom end is connected to the electrode of the semiconductor element 13, and the top end is used to connect to the external circuit. The base material of the copper column electrode 14 can be copper and its alloy, and nickel, tin, gold and other materials will be electroplated on its surface. Usually, the shape of the copper column electrode 14 is a cube or a cylinder.

[0031] like Figure 2 , Figure 3 As shown, the present application proposes a welding positioning device for a copper column electrode of a miniature temperature difference electric component, including a component positioning unit and an electrode positioning unit: wherein the component positioning unit is used to fix the temperature difference electric component to be welded, including a positioning seat 2, the positioning seat 2 is provided with a positioning groove 21 for positioning the temperature difference electric component to be welded and a limiting mechanism 22 for pressing the temperature difference electric component; the electrode positioning unit is used to fix the copper column electrode 14, including a pressing block 4 for pressing the copper column electrode 14 and a pressure plate assembly 3 for fixing the pressing block 4 and the copper column electrode 14, the pressure plate assembly 3 is detachably connected to the positioning seat 2 and is gap-matched with the positioning groove 21, so that the welding equipment can perform welding operations through the gap between the two.

[0032] The above-mentioned positioning seat 2 is a flat plate structure, and can also be designed as a table-like structure with a plane, which is not limited here; the positioning groove 21 is arranged on the upper end surface of the positioning seat 2, and the positioning groove 21 is used to accommodate the temperature difference electric component to be welded, and the limiting mechanism 22 is arranged on the positioning seat 2 at a position that can be aligned with the positioning groove 21, so that the temperature difference electric component to be welded can be pressed against and fixed at the set position of the positioning groove 21 by the limiting mechanism 22, and the position is defined as the welding station; the pressing plate assembly 3 is constructed at a position corresponding to the welding station, and after the temperature difference electric component to be welded is placed in the welding station, the pressing plate assembly 3 is installed on the positioning seat 2, so that the copper The column electrode 14 is aligned and connected to the intended welding part of the temperature difference electric component to be welded, and then the pressure block 4 is pressed on the top of the copper column electrode 14, and the pressure block 4 is fixed by the pressure plate assembly 3, so that it can provide sufficient pressure to the copper column electrode 14 to prevent the copper column motor from shifting, rotating and tilting during the welding process, which will have an adverse effect on the welding stability and welding quality; at the same time, there is a sufficient gap between the pressure plate assembly 3 and the positioning groove 21. When the temperature difference electric component to be welded and the copper column electrode 14 are located at the welding station, the connection part between the two corresponds to the gap, so that the welding equipment can perform welding operations through the gap.

[0033] Through the above technical scheme, the positioning groove 21, the limiting mechanism 22, the pressure plate assembly 3 and the pressure block 4 cooperate with each other to respectively press and fix the temperature difference electrical component to be welded and the copper column electrode 14 on the welding station, which can effectively realize the precise positioning of the temperature difference electrical component to be welded and the copper column electrode 14, and ensure that they remain stable during the welding process, prevent problems such as displacement, rotation and tilt, thereby improving the stability and quality of welding.

[0034] In a preferred embodiment, in order to meet the space required for the welding operation, a positioning groove 21 is arranged at one end of the positioning seat 2, and the welding station can be arranged near the end position. At the same time, when the temperature difference electric component to be welded is placed, the welding part is facing the side close to the end, and the limiting mechanism 22 is arranged at a position opposite to the positioning seat 2 and the positioning groove 21; when performing welding operations, the welding gun outlet of the welding equipment is arranged at one end close to the positioning groove 21, which not only provides a larger maneuvering space for the welding equipment and facilitates operation, but also avoids mutual obstruction between the welding equipment and the limiting mechanism 22, thereby improving the efficiency and safety of the welding operation.

[0035] like Figure 4As shown, the shape of the positioning groove 21 is adapted to the outer contour of the thermoelectric component to be welded. Usually, the outer contour of the thermoelectric component to be welded is square. The shape of the positioning groove 21 in the embodiment of the present application is also constructed as a square, and its size is slightly larger than the outer contour of the thermoelectric component to be welded. The thermoelectric component to be welded can be easily placed in the positioning groove 21 without squeezing hard, avoiding damage to the edge of the thermoelectric component to be welded; the positioning groove 21 is provided with a top support structure 211, which is used to cooperate with the limiting mechanism 22 to limit the thermoelectric component. In the embodiment of the present application, the top support structure 211 and the limiting mechanism 22 are arranged relative to each other, which can realize the limitation of the four end faces of the thermoelectric component to be welded, so that the thermoelectric component to be welded can be stably fixed at the welding station to realize the alignment connection with the copper column electrode 14, ensure the relative position between the two is accurate, and effectively improve the positioning efficiency and reduce the difficulty of positioning.

[0036] like Figure 4 As shown, the above-mentioned limiting mechanism 22 includes a limiting top piece 221, a movable block 222 and an elastic piece 223, wherein one end of the elastic piece 223 is connected to the positioning seat 2, and the other end is connected to the movable block 222; the limiting top piece 221 is connected to the end of the movable block 222 opposite to the elastic piece 223, and can abut against the corner of the thermoelectric component to be welded under the action of the elastic piece 223. Preferably, the central axis of the above-mentioned elastic piece 223 is parallel to the line connecting the corner and the center of the thermoelectric component to be welded, and is in a contracted state, and the movable piece and the limiting top piece 221 are pushed to move in the opposite direction under the action of the contraction pressure, thereby pushing the thermoelectric component to be welded to move in the opposite direction until the two end faces of the thermoelectric component to be welded opposite to the corner are respectively abutted against the side walls of the positioning groove 21 and at least one top support structure 211, and at this time, the position of the thermoelectric component to be welded is the welding station, thereby realizing the rapid and accurate positioning of the thermoelectric component to be welded.

[0037] The end shape of the above-mentioned limiting top member 221 is adapted to the corner of the temperature difference electrical component to be welded, so that it can abut against the end faces on both sides of the corner respectively, effectively pushing the temperature difference electrical component to be welded to move to the welding station.

[0038] Preferably, if Figure 4As shown, the positioning groove 21 is also provided with a limiting angle 212. The limiting angle 212, the top supporting structure 211 and the limiting top piece 221 respectively correspond to the four corners of the temperature difference electrical component to be welded. By setting the limiting angle 212 and the top supporting structure 211, it is more convenient to place the temperature difference electrical component to be welded in the correct initial position in the positioning groove 21, so that the limiting top piece 221 is aligned with the corresponding corners of the temperature difference electrical component to be welded; when the temperature difference electrical component to be welded is moved to the welding station under the push of the limiting top piece 221, the two corners of the temperature difference electrical component to be welded are respectively abutted against the two top supporting structures 211, and the two top supporting structures 211 and the limiting top piece 221 are respectively abutted against the three corners of the temperature difference electrical component to be welded, thereby forming a stable limit for the temperature difference electrical component to be welded to prevent it from moving during the welding process, while ensuring accurate positioning and improving the stability of the welding operation.

[0039] In a specific embodiment, Figure 4 As shown, the positioning groove 21 extends to the end of the positioning seat 2, and the welding station has a set distance from the end. The side walls of the positioning groove 21 are narrowed at the corresponding position of the welding station to form a top support structure 211. The distance between the two narrowed side walls is smaller than the corresponding width of the temperature difference electrical component to be welded, so as to form an effective limit for the temperature difference electrical component to be welded.

[0040] Furthermore, the positioning seat 2 is also provided with a limiting groove 23, which is adapted to the movable block 222 and is used to limit the moving path and moving range of the movable block 222. Specifically, the elastic member 223 is connected to one end of the limiting groove 23, and the opposite ends of the movable member are slidably connected to the side walls of the limiting groove 23, and can move along the limiting groove 23 under the action of the elastic member 223. When the temperature difference electrode to be welded moves to the welding station, the side wall of the limiting groove 23 just abuts against the other end face of the movable block 222 relative to the elastic member 223. At this time, the three end faces of the movable block 222 are respectively in contact with the side walls of the limiting groove 23, and the other end abuts against the elastic member 223. Through this design, not only the movement of the movable block 222 is made more accurate and stable, but also it can be firmly fixed in the limiting groove 23 to prevent it from lateral movement during the welding process.

[0041] The movable block 222 is also provided with a limit pin 224, and the limit slot 23 is provided with a limit hole matched with the limit pin 224; when the temperature difference electric component to be welded is moved to the welding station and the movable block 222 moves to one end of the limit slot 23, the limit hole and the limit pin 224 are in corresponding positions. Preferably, the limit pin 224 is threadedly matched with the limit hole, and the movable block 222 can be fixed to the limit slot 23 by screwing the limit pin 224 into the limit hole. This design can not only enable the limit top piece 221 to better effectively limit the temperature difference electric component to be welded, but also prevent the movable block 222 from vibrating under the influence of welding operation, thereby further enhancing the positioning accuracy and the stability of welding operation.

[0042] Preferably, the movable block 222 is also provided with a push rod 225 for pushing the movable block 222 to move. By pushing the push rod 225 in the reverse direction, it is convenient to place the thermoelectric refrigeration component to be welded in the positioning groove 21 before welding, and after the welding operation is completed, the limit of the limit top piece 221 on the welded thermoelectric component is released, so that the thermoelectric component can be easily taken out.

[0043] like Figure 5 , Figure 6 As shown, the pressure plate assembly 3 in the present application includes a first pressure plate 31 and a second pressure plate 32, the first pressure plate 31 is provided with a first positioning hole 311 adapted to the copper column electrode 14; the second pressure plate 32 is arranged above the second pressure plate 32, and is provided with a second positioning hole 321 adapted to the pressure block 4; the second positioning hole 321 is connected with the first positioning hole 311, and the size of the pressure block 4 is larger than the size of the copper column electrode 14; specifically, the first pressure plate 31, the second pressure plate 32 and the positioning seat 2 are provided with matching assembly holes, so that the first pressure plate 31 and the second pressure plate 32 can be fixed to the The setting position of the positioning seat 2; the setting position enables the positioning hole of the first pressing plate 31 to be aligned with the welding part of the thermoelectric component to be welded in the welding work, and the copper column electrode 14 is placed in the first positioning hole 311, and the copper column electrode 14 falls to the welding part under the action of gravity; at this time, the distance between the upper end surface of the first pressing plate 31 and the welding part is less than the length of the copper column electrode 14, so that the upper end of the copper column electrode 14 is exposed from the first pressing plate 31; the pressing block 4 located in the second positioning hole 321 presses the copper column electrode 14 under the action of gravity to fix the copper column electrode 14. By setting the first positioning hole 311, the precise positioning and lateral limitation of the copper column electrode 14 are achieved, and by setting the pressing block 4 and the second pressing plate 32, the vertical limitation of the copper column electrode 14 is achieved, thereby ensuring the relative position of the copper column electrode 14 and the thermoelectric component to be welded is accurate, and improving the stability of the welding operation.

[0044] Furthermore, in order to prevent the pressing block 4 from vibrating under the influence of the welding operation, the second pressing plate 32 is further provided with a locking hole 322 connected to the second positioning hole 321, and the locking hole 322 is perpendicular to the second positioning hole 321, and is used to fix the pressing block 4 through a positioning pin. Specifically, the positioning pin is threadedly matched with the locking hole 322, so that the pressing block 4 is stably fixed in the second positioning hole 321, further improving the stability of the welding operation.

[0045] In a preferred embodiment, a groove 312 is provided at a position of the first positioning plate corresponding to the limiting groove 23, and the groove 312 and the limiting groove 23 form an opening of sufficient size so that the welding equipment can perform welding operations through the opening. The opening in the present application can be adapted to the welding equipment used in commonly used welding methods such as reflow soldering, laser welding or flame gas phase welding.

[0046] Furthermore, the positioning base 2 is also provided with a handle 24 to facilitate the hand-held movement of the positioning base 2 .

[0047] The present application fixes the to-be-welded temperature difference electric component by means of a component positioning unit, and fixes the copper pillar electrode by means of an electrode positioning unit, and the cooperation of the two realizes precise positioning of the to-be-welded temperature difference electric component and the electrode positioning unit; at the same time, by setting a limiting mechanism, the to-be-welded temperature difference electric component is stably fixed at the welding station, and by setting a pressure plate component, the copper pillar electrode is firmly fixed at the welding position, ensuring that the two remain stable during the welding process, preventing problems such as displacement, rotation and tilt, thereby improving the welding stability and welding quality; the present application has a simple structure and is easy to manufacture, which is not only easy to operate, but also helps to reduce the difficulty of welding operations, and improve the safety and efficiency of welding operations.

[0048] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A welding positioning device for copper column electrodes of a micro-thermoelectric component, characterized in that: include: The component positioning unit comprises a positioning seat, on which a positioning groove for positioning the temperature difference electric component to be welded and a limiting mechanism for pressing against the temperature difference electric component to be welded are provided; The electrode positioning unit includes a pressing block for pressing the copper column electrode and a pressing plate assembly for fixing the pressing block and the copper column electrode. The pressing plate assembly is detachably connected to the positioning seat and cooperates with the positioning groove gap to facilitate welding equipment to perform welding operations through the gap between the two.

2. The welding positioning device for copper column electrode of a micro thermoelectric component according to claim 1 is characterized in that: The shape of the positioning groove is adapted to the outer contour of the temperature difference electrical component to be welded, and a top end support structure is provided for cooperating with the limiting mechanism to limit the temperature difference electrical component to be welded.

3. The welding positioning device for copper column electrode of a micro thermoelectric component according to claim 1 or 2, characterized in that: The limiting mechanism includes a limiting top piece, a movable block and an elastic piece, one end of the elastic piece is connected to the positioning seat, and the other end is connected to the movable block; the limiting top piece is connected to the end of the movable block opposite to the elastic piece, and can press against the corner of the temperature difference electrical component to be welded under the action of the elastic piece.

4. The welding positioning device for copper column electrode of a micro thermoelectric component according to claim 3 is characterized in that: The shape of the end of the limiting top piece is adapted to the corner of the temperature difference electrical component to be welded.

5. The welding positioning device for copper column electrode of a micro thermoelectric component according to claim 4 is characterized in that: The positioning seat is also provided with a limiting groove, which is matched with the movable block and is used to limit the moving path and moving range of the movable block.

6. The welding positioning device for copper column electrode of a micro thermoelectric component according to claim 5, characterized in that: The movable block is also provided with a limiting pin, and the limiting groove is provided with a limiting hole matched with the limiting pin.

7. The welding positioning device for copper column electrode of a micro thermoelectric component according to any one of claims 4 to 6, characterized in that: The movable block is also provided with a push rod for pushing the movable block to move.

8. The welding positioning device for copper column electrode of a micro thermoelectric component according to claim 7, characterized in that: The pressure plate assembly includes a first pressure plate and a second pressure plate, the first pressure plate is provided with a first positioning hole adapted to the copper column electrode; the second pressure plate is arranged above the second pressure plate and is provided with a second positioning hole adapted to the pressure block; the second positioning hole is connected with the first positioning hole, and the size of the pressure block is larger than the copper column electrode.

9. The welding positioning device for copper column electrode of a micro thermoelectric component according to claim 8, characterized in that: The second pressing plate is further provided with a locking hole communicated with the second positioning hole, for fixing the pressing block via a positioning pin.

10. The welding positioning device for copper column electrode of a micro thermoelectric component according to claim 1, characterized in that: The positioning seat is also provided with a handle to facilitate the hand-held movement of the positioning seat.

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