Laser welding press-fit device capable of compensating tolerance in self-adaptive mode

Abstract

The utility model discloses a laser welding press-fit device for self-adaptive tolerance compensation, which comprises a base and a press plate, and a first part is positioned on the base; the pressing device further comprises a floating assembly, the floating assembly comprises a floating platform arranged in an up-down floating mode and an elastic supporting piece which is supported at the bottom of the floating platform and can stretch out and draw back up and down, the second part is placed on the floating platform, and the to-be-bonded face of the second part and the to-be-bonded face of the first part are arranged in an up-down alignment mode. The floating platform synchronously moves downwards and drives the second part and the first part to be attached from the to-be-attached face. On one hand, dimensional tolerance of a product can be compensated in a self-adaptive mode through movement of the floating platform, accurate attachment and stable press fit of the first part and the second part are achieved, the welding stability of the product is effectively improved, and therefore the welding quality and the yield of the product are improved; and on the other hand, cost waste caused by too high product precision requirement in the assembling process is avoided, the production efficiency is improved, and therefore the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser welding, and in particular relates to a laser welding pressing device capable of adaptively compensating tolerance. Background Art

[0002] Laser welding is commonly used as an efficient and economical operation method. It uses high-energy laser pulses to locally heat the material in a small area. It is a non-contact welding method with small focusing light and high positioning accuracy. It can be used for precision welding of various tiny and heat-sensitive parts such as jewelry, watch springs, integrated circuit leads, etc.

[0003] Currently, the existing technology requires a specific welding jig to press and fix the parts during the welding process before performing the welding process.

[0004] However, in the actual welding process, due to the different sizes and shapes of the welded parts, the two pieces of products need to be fitted together during welding. However, if the dimensional tolerance is too high, it will cause waste of processing costs. If the parts cannot be pressed tightly together, it will cause unstable welding and various adverse phenomena. Therefore, how to fit and press the two welded parts together is a difficult problem in tooling design. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an improved laser welding pressing device with adaptive tolerance compensation.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A laser welding pressing device with adaptive tolerance compensation includes a base and a pressure plate for pressing a first part and a second part, the first part is positioned on the base; the pressing device also includes a floating assembly, the floating assembly includes a floating platform arranged to float up and down, and an elastic support member supported on the bottom of the floating platform and capable of stretching up and down, the second part is placed on the floating platform, and the second part and the first part's surfaces to be bonded are arranged in an aligned position up and down, the pressure plate is used to press the second part downward, and the floating platform moves downward synchronously and drives the second part to bond with the first part from the surfaces to be bonded.

[0008] According to a specific embodiment and preferred aspect of the present invention, the second part is placed flat on the upper surface of the floating platform. In the initial state, the upper surface of the floating platform is greater than or equal to the height of the surface to be bonded to the first part. In the pressed state, the upper surface of the floating platform is flush with the surface to be bonded to the first part. This facilitates precise control of the movement of the second part.

[0009] According to another specific embodiment and preferred aspect of the present invention, the base is recessed inward from the top surface to form a groove, and the first part and the floating platform are both disposed in the groove. When the pressing plate is pressed down to the lowest point, the pressing plate abuts against the top surface of the base. Here, the base limits the pressing plate, preventing damage to the product or the base caused by excessive downward pressure of the pressing plate.

[0010] Preferably, the top surface of the base is provided with a plurality of positioning posts, and the pressing plate is provided with a plurality of positioning holes that correspond one to one with the plurality of positioning posts. When the pressing plate is pressed down, the plurality of positioning posts are correspondingly inserted into the plurality of positioning holes, thereby improving the accuracy of the pressing plate's pressing position.

[0011] Furthermore, the top surface of the base is equipped with multiple magnetic elements, each of which can simultaneously attract the pressure plate. During pressing, the combined force of the magnetic elements on the pressure plate and the weight of the pressure plate itself equals the downward force exerted on the second component. This combined force exerts pressure on the second component, ensuring stable pressing while preventing deformation or damage to the product.

[0012] Preferably, a gap is formed in the middle of the pressure plate to avoid the welding area of the first part and the second part, and multiple magnetic attraction parts are distributed around the gap. Here, the magnetic attraction force is evenly distributed with the welding area as the center.

[0013] Preferably, the groove is recessed inward from the bottom of the groove and forms a first positioning groove that matches the first part, and a second positioning groove located to one side of the first positioning groove and matching the elastic support member. The first part is inserted into the first positioning groove; the elastic support member is inserted into the second positioning groove and abuts the bottom of the floating platform from its upper end. This provides a simple structure and is easy to install and implement.

[0014] Specifically, there are multiple second positioning grooves and they are distributed close to both ends of the floating platform; there are multiple elastic support members and they are correspondingly inserted into each second positioning groove, wherein the upper ends of multiple elastic support members extend upward from the second positioning groove and are arranged flush.

[0015] Preferably, multiple spaced-apart stop modules are fixedly positioned within the groove. Initially, the elastic support member forces the floating platform upward, where it engages the multiple stop modules, maintaining a horizontal position. The multiple stop modules ensure that the floating platform remains horizontal in its initial position, facilitating precise placement of the second part and preventing deviation.

[0016] Specifically, countersunk holes corresponding to multiple limit modules are formed on the floating platform. Each limit module includes a connecting column extending up and down, and a protrusion fixedly arranged at the upper end of the connecting column and matching the countersunk hole. The connecting column passes downward through the corresponding countersunk hole and is fixedly connected to the bottom of the groove. The protrusion is located in the corresponding countersunk hole, and the height of each protrusion is equal.

[0017] Due to the implementation of the above technical solution, the utility model has the following advantages compared with the prior art:

[0018] In the prior art, due to the different sizes and shapes of the welding parts, the two pieces of products need to be fitted together during welding. However, if the dimensional tolerance is too high, it will cause a waste of processing costs. If the parts cannot be tightly pressed together, it will cause unstable welding and various undesirable phenomena. Therefore, how to fit and press the two welding parts together is a difficult problem in tooling design. The present application comprehensively designs the structure of the laser welding pressing device with adaptive compensation tolerance, cleverly solving the shortcomings and defects of the prior art. After adopting the pressing device, the first part to be welded is positioned on the base, and the second part to be welded is placed on the floating platform, and the surfaces to be fitted of the second part and the first part are aligned up and down; then, by pressing The plate presses the second part downward, and the floating platform moves downward synchronously and drives the second part to fit and press the first part from the surface to be fitted. In this process, the floating gap caused by the downward movement of the floating platform adaptively compensates for the product size tolerances of the first part and the second part. Therefore, compared with the existing technology, the utility model can, on the one hand, adaptively compensate for the dimensional tolerances of the product through the movement of the floating platform, achieve precise fitting and stable pressing of the first and second parts, effectively improve the stability of product welding, thereby improving welding quality and product yield; on the other hand, it avoids cost waste caused by excessively high product precision requirements during assembly, improves production efficiency, and thus reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the laser welding and pressing device with adaptive tolerance compensation of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure decomposition of the laser welding and pressing device with adaptive tolerance compensation of the present invention;

[0022] Figure 3 It is a top view schematic diagram of the laser welding and pressing device with adaptive tolerance compensation of the present invention;

[0023] Figure 4 for Figure 3 AA-direction cross-sectional view;

[0024] Wherein: 1, base; c0, groove; c1, first positioning groove; c2, second positioning groove; m, limit module; m0, connecting column; m1, protrusion; 10, positioning column; 11, magnetic attraction part;

[0025] 2. Floating assembly; 20. Floating platform; k. Countersunk hole; 21. Elastic support member;

[0026] 3. Pressing plate; 30. Positioning hole; 31. Notch;

[0027] L1, first part; L2, second part. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] like Figures 1 to 4 As shown, a laser welding and pressing device with adaptive tolerance compensation in this embodiment includes a base 1, a floating component 2, and a pressing plate 3.

[0035] Specifically, the first part L1 is a terminal head for a plug product, and the second part L2 is a circuit board. In this embodiment, the first part L1 and the second part L2 are pressed together by the base 1 and the pressing plate 3, and then the two are laser welded.

[0036] In this example, the base 1 is recessed inward from the top surface to form a groove c0, and the groove c0 is recessed inward from the bottom of the groove to form a first positioning groove c1 matching the first part L1 and a second positioning groove c2 located on one side of the first positioning groove c1, wherein the first part L1 is inserted from top to bottom and positioned in the first positioning groove c1, and the upper end portion of the first part L1 extends out of the first positioning groove c1, and the upper end surface of the first part L1 is the surface to be bonded with the second part L2.

[0037] In this example, the floating component 2 includes a floating platform 20 that extends horizontally and can float up and down, and an elastic support member 21 supported on the bottom of the floating platform 20 and can be stretched up and down, wherein the elastic support member 21 matches the second positioning groove c2, and the elastic support member 21 is inserted into the second positioning groove c2 and abuts against the bottom of the floating platform 20 from the upper end. That is to say, in this embodiment, the first part L1 and the floating platform 20 are both arranged in the groove c0, and the bottom surface of the second part L2 is formed with a surface to be bonded with the first part L1. The second part L2 is placed on the floating platform 20, and the surfaces to be bonded of the second part L2 and the first part L1 are arranged in an aligned position up and down. The pressure plate 3 is used to press down the second part L2, and the floating platform 20 moves downward synchronously and drives the second part L2 to bond with the first part L1 from the surface to be bonded.

[0038] In some specific embodiments, the second part L2 is placed flat on the upper surface of the floating platform 20. In the initial state, that is, when the pressure plate 3 does not press down on the second part L2, the height of the upper surface of the floating platform 20 is greater than or equal to the height of the surface to be bonded of the first part L1; in the pressed state, that is, when the surfaces to be bonded of the first part L1 and the second part L2 are bonded up and down, the upper surface of the floating platform 20 is flush with the surface to be bonded of the first part L1.

[0039] There are multiple second positioning grooves c2 and are distributed near the two ends of the floating platform 20; there are multiple elastic support members 21 and they are correspondingly inserted into each second positioning groove c2, among which the upper ends of multiple elastic support members 21 extend upward from the second positioning groove c2 and are arranged flush; the elastic support members 21 of this embodiment are all made of wire springs.

[0040] In order to further ensure that the floating platform 20 is horizontal in the initial state, a plurality of limit modules m are fixedly provided in the groove c0 and are spaced side by side. In the initial state, the elastic support member 21 drives the floating platform 20 upward and synchronously conflicts with the plurality of limit modules m, and the floating platform is in a horizontal state.

[0041] In some specific embodiments, countersunk holes k corresponding to multiple limit modules m are formed on the floating platform 20, and each limit module m includes a connecting column m0 extending up and down, and a protrusion m1 fixedly set at the upper end of the connecting column m0 and matching the countersunk hole k, wherein the connecting column m0 passes downward through the corresponding countersunk hole k and is fixedly connected to the bottom of the groove c0, and the protrusion m1 is located in the corresponding countersunk hole k; the height of each protrusion m1 is equal.

[0042] In addition, the top surface of the base 1 is provided with a plurality of positioning posts 10, and the pressure plate 3 has a plurality of positioning holes 30 that correspond one-to-one to the plurality of positioning posts 10. When the pressure plate 3 is pressed down, the plurality of positioning posts 10 are correspondingly inserted into the plurality of positioning holes 30; at the same time, the top surface of the base 1 is also provided with a plurality of magnetic suction parts 11, wherein the plurality of magnetic suction parts 11 can synchronously adsorb the pressure plate 3, and when pressed, the sum of the adsorption force of the plurality of magnetic suction parts 11 on the pressure plate 3 and the gravity of the pressure plate 3 itself is equal to the downward pressure exerted on the second part L2. In some specific embodiments, a gap 31 is formed in the middle of the pressure plate 3 to avoid the welding area of the first part L1 and the second part L2, and the plurality of magnetic suction parts 11 are distributed around the gap 31; when the pressure plate 3 is pressed down to the lowest point, the pressure plate 3 rests on the top surface of the base 1.

[0043] In summary, after adopting the pressing device, the first part to be welded is positioned on the base, the second part to be welded is placed on the floating platform, and the second part and the surface to be bonded of the first part are aligned up and down; then the second part is pressed downward by the pressing plate, and the floating platform moves downward synchronously and drives the second part and the first part to be bonded and pressed tightly from the surface to be bonded. In this process, the floating gap caused by the downward movement of the floating platform adaptively compensates for the product dimensional tolerances of the first part and the second part. Therefore, compared with the prior art, the utility model can, on the one hand, adaptively compensate for the dimensional tolerances of the product through the movement of the floating platform, thereby achieving precise bonding and stable pressing of the first and second parts, and effectively improving the welding quality of the product. On the one hand, it improves stability, thereby improving welding quality and product yield; on the other hand, it avoids cost waste caused by excessive product precision requirements during assembly, improves production efficiency, and thus reduces production costs; on the other hand, the base forms a limit on the pressure plate to prevent excessive downward pressure of the pressure plate from causing damage to the product or the base; on the other hand, the sum of the suction force of the magnetic part and the weight of the pressure plate itself is used to apply pressure to the second part, thereby achieving stable pressing and avoiding deformation or damage to the product; in addition, with the welding area as the center, the magnetic attraction force is evenly distributed; on the fifth hand, by setting a plurality of limit modules, it is ensured that the floating platform is in a horizontal state in the initial state, so as to facilitate the precise placement of the second part and avoid offset.

[0044] The present invention has been described in detail above, but the present invention is not limited to the above embodiments. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser welding and pressing device with adaptive tolerance compensation, comprising a base and a pressing plate for pressing a first part and a second part, characterized in that: The first part is positioned on the base; the pressing device also includes a floating assembly, which includes a floating platform that is arranged to float up and down, and an elastic support member that is supported at the bottom of the floating platform and can be extended and retracted up and down. The second part is placed on the floating platform, and the second part and the surface to be bonded of the first part are arranged in a vertical position, and the pressing plate is used to press the second part down, and the floating platform moves downward synchronously and drives the second part to bond with the first part from the surface to be bonded.

2. The laser welding and pressing device with adaptive tolerance compensation according to claim 1, characterized in that: The second part is placed flat on the upper surface of the floating platform. In the initial state, the height of the upper surface of the floating platform is greater than or equal to the height of the surface to be bonded of the first part; in the pressed state, the upper surface of the floating platform is flush with the surface to be bonded of the first part.

3. The laser welding and pressing device with adaptive tolerance compensation according to claim 1 or 2, characterized in that: The base is recessed inward from the top surface to form a groove, the first part and the floating platform are both arranged in the groove, and when the pressing plate is pressed down to the lowest point, the pressing plate abuts against the top surface of the base.

4. The laser welding and pressing device with adaptive tolerance compensation according to claim 3, characterized in that: The top surface of the base is provided with a plurality of positioning columns, and the pressing plate has a plurality of positioning holes that match the plurality of positioning columns one by one. When the pressing plate is pressed down, the plurality of positioning columns are correspondingly inserted into the plurality of positioning holes.

5. The laser welding and pressing device with adaptive tolerance compensation according to claim 3, characterized in that: The top surface of the base is also provided with a plurality of magnetic parts, wherein the plurality of magnetic parts can simultaneously adsorb the pressure plate, and when pressed, the sum of the adsorption force of the plurality of magnetic parts on the pressure plate and the gravity of the pressure plate itself is equal to the downward pressure exerted on the second part.

6. The laser welding and pressing device with adaptive tolerance compensation according to claim 5, characterized in that: A gap is formed in the middle of the pressing plate to avoid the welding area of the first part and the second part, and the multiple magnetic attraction parts are distributed around the gap.

7. The laser welding and pressing device with adaptive tolerance compensation according to claim 3, characterized in that: The groove is recessed inward from the bottom of the groove and forms a first positioning groove matching the first part and a second positioning groove located on one side of the first positioning groove and matching the elastic support member. The first part is inserted into the first positioning groove; the elastic support member is inserted into the second positioning groove and contacts the bottom of the floating platform from the upper end.

8. The laser welding and pressing device with adaptive tolerance compensation according to claim 7, characterized in that: There are multiple second positioning grooves and they are distributed close to both ends of the floating platform; there are multiple elastic support members and they are correspondingly inserted into each second positioning groove, wherein the upper ends of multiple elastic support members extend upward from the second positioning groove and are arranged flush.

9. The laser welding and pressing device with adaptive tolerance compensation according to claim 3, characterized in that: A plurality of limiting modules spaced side by side are fixedly provided in the groove. In the initial state, the elastic support member drives the floating platform upward and synchronously contacts the plurality of limiting modules, and the floating platform is in a horizontal state.

10. The laser welding and pressing device with adaptive tolerance compensation according to claim 9, characterized in that: The floating platform is provided with countersunk holes corresponding to a plurality of limit modules one by one, and each limit module includes a connecting column extending up and down, and a protrusion fixedly arranged at the upper end of the connecting column and matching the countersunk hole, wherein the connecting column passes downward through the corresponding countersunk hole and is fixedly connected to the bottom of the groove, the protrusion is located in the corresponding countersunk hole, and the height of each protrusion is equal.

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