A precision welding assembly for use in tight spaces

Abstract

This utility model discloses a precision welding assembly for use in confined spaces, comprising two sets of symmetrically arranged welding needle fixing blocks. The back of each welding needle fixing block is fixed to a rotating sleeve on the surface of a rotating mechanism driven by a servo motor. A vertically penetrating slot is formed on one side of each of the two sets of welding needle fixing blocks. A positioning part with a diameter larger than the slot width is provided in the middle of the slot. A welding needle is installed in the positioning part and locked in place by bolts on the end face of the welding needle fixing block. A deflectable aiming ring is connected to the bottom of the welding needle fixing block via a connecting rod. The side of the aiming ring is connected to the bottom of the connecting rod via a deflection mechanism. This utility model, through its angle-adjustable aiming ring structure, meets the requirement of a weld thickness of less than 5mm. 2 To meet the welding requirements within the confined space, the elastic ceramic claws suppress solder feeding jitter compared to manual solder feeding, while the laser positioning module and camera ensure repeatability and positioning accuracy, thus improving the welding yield in confined spaces.

Description

Technical Field

[0001] This utility model relates to the field of electronic welding technology, and in particular to a precision welding assembly for use in confined spaces. Background Technology

[0002] Currently, the welding guns on general mechanical equipment cannot enter confined spaces for riveting, requiring manual welding. This not only fails to guarantee welding accuracy but also makes it easy for the object to deviate during welding, resulting in low welding efficiency. Traditional welding guns with a diameter greater than 5mm cannot reach narrow areas, and manual solder feeding can cause vibration deviations, increasing the short circuit rate. Utility Model Content

[0003] To address the aforementioned technical problems, a precision welding assembly for use in confined spaces is provided.

[0004] To achieve the above objectives, this utility model discloses a precision welding assembly for use in confined spaces, comprising two sets of symmetrically arranged welding needle fixing blocks. The back of each welding needle fixing block is fixed to a rotating sleeve on the surface of a rotating mechanism. The rotating mechanism is driven by a servo motor. A vertically penetrating slot is provided on one side of each of the two sets of welding needle fixing blocks. A positioning part with a diameter greater than the width of the slot is provided in the middle section of the slot. A welding needle is installed in the positioning part and locked by bolts on the end face of the welding needle fixing block. A deflectable aiming ring is connected to the bottom of the welding needle fixing block via a connecting rod. The side of the aiming ring is connected to the bottom of the connecting rod via a deflection mechanism.

[0005] Furthermore, an eccentric welding needle head is provided at the bottom of the welding needle, and a laser positioning module and a miniature camera are installed at the welding needle position on the side of the eccentric welding needle head.

[0006] Furthermore, the bottom shape of the eccentric welding needle is flat, spherical, or conical.

[0007] Furthermore, the laser positioning module emits a 650nm red laser with a coaxiality deviation of ≤0.02mm with the welding needle.

[0008] Furthermore, the aiming ring is made of titanium alloy, and the inner wall of the aiming ring is provided with at least three sets of elastic ceramic claws to adaptively clamp the solder wire. The elastic ceramic claws are composed of ZrO2 ceramic sheets distributed at equal angles, and the clamping force is 0.5N to 1.2N.

[0009] Furthermore, the surface of the aiming ring is coated with a nano-zirconia heat-insulating coating with a thickness of 50±5μm and a thermal conductivity of ≤1.2W / (m·K).

[0010] Furthermore, the deflection mechanism uses a shape memory alloy drive made of NiTiNb material.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a precision welding assembly for use in confined spaces, which, through an angle-adjustable aiming ring structure, meets the requirement of less than 5mm. 2 To meet the welding requirements within the confined space, the elastic ceramic claws suppress solder feeding jitter compared to manual solder feeding, while the laser positioning module and camera ensure repeatability and positioning accuracy, thus improving the welding yield in confined spaces. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the aiming ring structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the deflection state of the aiming ring of this utility model.

[0016] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0017] In the diagram: 1 is the rotating mechanism; 11 is the rotating sleeve; 2 is the welding needle fixing block; 21 is the slot; 3 is the welding needle; 31 is the eccentric welding needle head; 4 is the connecting rod; 5 is the aiming ring; 51 is the elastic ceramic claw; 6 is the deflection mechanism; 7 is the laser positioning module; 8 is the miniature camera. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] One embodiment of this utility model is as follows: Figure 1 and Figure 3As shown, the back of the solder pin fixing block 2 is fixed to the rotating sleeve 11 on the surface of the rotating mechanism 1. The rotating mechanism 1 is driven by a servo motor. A vertical through slot 21 is provided on one side of the two sets of solder pin fixing blocks 2. A positioning part with a diameter larger than the width of the slot 21 is provided in the middle section of the slot 21. The solder pin 3 is installed in the positioning part and locked by bolts on the end face of the solder pin fixing block 2. The bottom of the solder pin fixing block 2 is connected to a deflectable aiming ring 5 through a connecting rod 4 to support lateral solder feeding. The side of the aiming ring 5 is connected to the bottom of the connecting rod 4 through a deflection mechanism 6. Through the angle-adjustable rotating mechanism and aiming ring structure, soldering at various angles can be achieved, meeting the requirement of less than 5mm. 2 To meet the welding requirements within the confined space, the elastic ceramic claws suppress solder feeding jitter compared to manual solder feeding, while the laser positioning module and camera ensure repeatability and positioning accuracy, thus improving the welding yield in confined spaces.

[0020] The bottom of the welding needle 3 is provided with an eccentric welding needle head 31. A laser positioning module 7 and a miniature camera 8 are installed on the welding needle position on the side of the eccentric welding needle head 31. They are connected to an external display component and can project the welding point position in real time, making it convenient for operators to perform fine operations.

[0021] The bottom shape of the eccentric welding needle 31 is flat, spherical, or conical. The appropriate welding needle can be selected according to the size of the weld point and the welding conditions to complete the welding, which has strong adaptability.

[0022] The laser positioning module 7 emits a 650nm red laser, and its coaxiality deviation with the welding pin 3 is ≤0.02mm, ensuring the positioning accuracy of the welding point.

[0023] The aiming ring 5 is made of titanium alloy. The inner diameter of the aiming ring is adjustable to accommodate the diameter of various solder wires. In this application, the inner wall of the aiming ring 5 is provided with three sets of elastic ceramic claws 51 to adaptively clamp the solder wire. The elastic ceramic claws 51 are composed of ZrO2 ceramic sheets distributed at 120° angles. The clamping force is 1N. During the external solder feeding process, the elastic ceramic claws clamp the solder wire, effectively reducing the solder feeding jitter.

[0024] The surface of the aiming ring 5 is coated with a nano-zirconia thermal insulation coating with a thickness of 50±5μm and a thermal conductivity of ≤1.2W / (m·K), which reduces temperature conduction loss and limits the range of heat diffusion by the aperture of the aiming ring, thereby reducing the diameter of the heat-affected zone.

[0025] The deflection mechanism 6 uses a shape memory alloy drive component made of NiTiNb material. It is driven and controlled by an external actuator and can complete a 45° deflection within 0.2s when activated by current, with a fast response speed.

[0026] Taking smartphone motherboard chip welding as an example, the welding needle is inserted into the welding gun body, the bolts on the surface of the welding needle fixing block are tightened to 3.5 N·m, the aiming ring is adjusted to a 20° tilt angle, and the laser positioning module is calibrated through a remote controller to keep the distance between the light spot and the eccentric welding needle head constant. The chip short circuit rate is reduced from 12% to 0.8%, and the thermal damage rate of adjacent components is reduced to 0%.

[0027] Several points need to be clarified: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and the relative positional relationships may change when the absolute position of the described objects changes. Second, in this document, relational terms such as "first" and "second" are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities.

[0028] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A precision welding assembly for use in a confined space, comprising two sets of symmetrically arranged welding pin fixing blocks (2), characterized in that, The back of the welding needle fixing block (2) is fixed on the rotating sleeve (11) on the surface of the rotating mechanism (1). The rotating mechanism (1) is driven by a servo motor. The two sets of welding needle fixing blocks (2) have a vertical through slot (21) on one side opposite to each other. The middle section of the slot (21) has a positioning part with a diameter greater than the width of the slot (21). The positioning part is equipped with a welding needle (3) and is locked by bolts on the end face of the welding needle fixing block (2). The bottom of the welding needle fixing block (2) is connected to a deflectable aiming ring (5) through a connecting rod (4). The side of the aiming ring (5) is connected to the bottom of the connecting rod (4) through a deflection mechanism (6).

2. A precision welding assembly for use in tight spaces as defined in claim 1, wherein, The bottom of the welding needle (3) is provided with an eccentric welding needle head (31), and a laser positioning module (7) and a miniature camera (8) are installed on the welding needle position on the side of the eccentric welding needle head (31).

3. A precision welding assembly for use in tight spaces as defined in claim 2, wherein, The bottom shape of the eccentric welding needle (31) is flat, spherical, or conical.

4. A precision welding assembly for use in tight spaces as defined in claim 2, wherein, The laser positioning module (7) emits a 650nm red laser, and the coaxiality deviation with the welding needle (3) is ≤0.02mm.

5. A precision welding assembly for use in tight spaces as defined in claim 1, wherein, The aiming ring (5) is made of titanium alloy. The inner wall of the aiming ring (5) is provided with at least three sets of elastic ceramic claws (51) to adaptively clamp the solder wire. The elastic ceramic claws (51) are composed of ZrO2 ceramic sheets distributed at equal angles, and the clamping force is 0.5N to 1.2N.

6. A precision welding assembly for use in tight spaces as defined in claim 5, wherein, The aiming ring (5) is coated with a nano-zirconia heat insulation coating with a thickness of 50±5μm and a thermal conductivity of ≤1.2W / (m·K).

7. A precision welding assembly for use in tight spaces as defined in claim 1, wherein, The deflection mechanism (6) uses a shape memory alloy drive made of NiTiNb material.

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