Combined welding fixture

Abstract

The utility model provides a kind of combined welding fixture, it is related to welding fixture technical field.The combined welding fixture is provided with base as the basic framework of whole fixture, provides stable mounting platform for each function module, effectively avoids the fixture displacement problem caused by external vibration or impact;Positioning module is designed with multiple sets of precision machined positioning pin, and combined with the vertical adjusting function of adjusting screw, can adapt to the workpiece demand of different sizes and heights, significantly improve the versatility of fixture;The synergistic effect of heat-conducting plate and heat dissipation fin of hot field adjusting assembly not only realizes the uniform distribution of heat, but also enhances the heat dissipation effect through the wavy design of heat dissipation fin, thereby effectively reduces the welding defect risk caused by uneven temperature in the welding process, solves the problems of poor applicability, complex operation and insufficient hot field control capability in prior art, provides a more efficient, accurate and reliable solution for BGA ball mounting process.

Description

Technical Field

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

[0002] In recent years, micro-assembly soldering technology has become a key process in the manufacturing of precision electronic components, widely used in semiconductor packaging, integrated circuit assembly, and high-density interconnects. For example, the ball-mounting process for ball grid array (BGA) packaged chips is a crucial step in micro-assembly soldering, placing high demands on the precision, thermal field control, and ease of operation of the soldering fixture. A search revealed a soldering fixture with publication number CN109249174B. This design achieves precise alignment and soldering of optical components and circuit boards through a sliding connection between optical component fixing components and circuit board fixing components. However, this design is mainly designed for welding optical devices and circuit boards, and it has certain limitations when adapting to other complex workpieces (such as composite workpieces), and there is room for improvement in terms of multi-angle and multi-directional welding requirements. In addition, its structural design is relatively specific and the operation steps are relatively complex, which may have a certain impact on production efficiency and cost control. In order to better meet the requirements of precise positioning, thermal uniformity, automatic template alignment and stress-free clamping in the BGA ball-mounting process, it is urgent to develop a professional welding fixture suitable for ball-mounting of BGA devices with a ball pitch of 0.3mm to 1.27mm. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a combined welding fixture, which solves the problem that welding fixtures are difficult to meet the requirements of BGA ball-mounting processes.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A modular welding fixture, comprising: a base, a positioning module, and a thermal field adjustment component;

[0006] The positioning module includes: a support plate, a telescopic rod, and a positioning pin;

[0007] The support plate is installed at the center position above the base by multiple evenly distributed telescopic rods. The support plate is provided with multiple positioning pins, which are symmetrically distributed along the longitudinal center line of the support plate.

[0008] The base is equipped with multiple thermal field adjustment components, which include: heat-conducting plates and heat dissipation fins.

[0009] The heat-conducting plate is fixed on the base, and the heat dissipation fins are arranged in a wave-like pattern on the outer side of the heat-conducting plate. Multiple heat-conducting grooves are opened on the inner side of the heat-conducting plate.

[0010] Preferably, the top of the locating pin is tapered.

[0011] Preferably, the heat-conducting grooves are arranged in parallel.

[0012] Preferably, the positioning module further includes: a worm gear and a turbine;

[0013] The worm gear is horizontally positioned, with both ends connected to the base bearings;

[0014] The worm gear is vertically positioned and connected to the base bearing;

[0015] The worm gear meshes with the worm.

[0016] A first screw is provided at the center of the lower part of the support plate, and a threaded hole matching the first screw is opened at the axis of the worm gear. The first screw passes through the base and is threadedly connected to the worm gear.

[0017] The outer end of the worm extends to the outside of the base, and a hand-tightening handle is installed on the outer end of the worm.

[0018] Preferably, a pair of template alignment components are provided on both sides of the base;

[0019] The template alignment assembly includes: a slide rail, a slider, a support arm, and a second screw;

[0020] The slide rail is installed on both sides of the base, the slider is slidably connected to the slide rail, the support arm is fixed on the slider, the outer end of the slide rail is provided with a support block, the support block is provided with a screw hole, the second screw is threadedly connected to the screw hole, the inner end of the second screw is connected to the slider bearing, and the outer end of the second screw extends to the outside of the support block and is connected to the hand-tightening block.

[0021] The free end of the support arm is provided with a wedge-shaped groove.

[0022] Preferably, a stress-free clamping mechanism is installed on the base;

[0023] The stress-free clamping mechanism includes: a support column, a clamping beam, an elastic pressure plate, and a silicone pad;

[0024] The bottom end of the support column is mounted on the base, and the top end of the support column is hinged to one end of the clamping beam. Several elastic pressure plates are installed on the bottom surface of the support column, and silicone pads are installed at the bottom ends of the elastic pressure plates.

[0025] Preferably, the bottom end of the support column is provided with an angle adjustment disc, which is connected to the base bearing.

[0026] Preferably, the upper surface of the base is provided with a plurality of auxiliary positioning holes, which are distributed at the four corners of the base.

[0027] Preferably, the base has a support on its bottom surface, and the bottom of the support has an anti-slip pad.

[0028] Preferably, the anti-slip mat is made of rubber.

[0029] This utility model provides a combined welding fixture. Compared with the prior art, it has the following advantages:

[0030] In this invention, the combined welding fixture uses a base as the basic frame for the entire fixture, providing a stable mounting platform for each functional module and effectively avoiding fixture displacement caused by external vibration or impact. The positioning module adopts a design with multiple sets of precision-machined positioning pins, combined with the vertical adjustment function of the adjusting screw, which can adapt to the needs of workpieces of different sizes and heights, significantly improving the versatility of the fixture. The thermal field adjustment component, through the synergistic effect of the heat-conducting plate and heat dissipation fins, not only achieves uniform heat distribution, but also enhances the heat dissipation effect through the wave-shaped design of the heat dissipation fins, thereby effectively reducing the risk of welding defects caused by uneven temperature during the welding process. This solves the problems of poor fixture applicability, complex operation, and insufficient thermal field control capability in the prior art, providing a more efficient, accurate, and reliable solution for BGA ball-mounting processes. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the combined welding fixture in an embodiment of the present invention.

[0033] Figure 2 This is an exploded view of the positioning module in an embodiment of this utility model.

[0034] Figure 3 This is a schematic diagram of the structure of the thermal field adjustment component in an embodiment of this utility model.

[0035] Figure 4 This is a schematic diagram of the template alignment component in an embodiment of the present invention.

[0036] Figure 5 This is a schematic diagram of the stress-free clamping mechanism in an embodiment of this utility model.

[0037] The reference numerals in the figure are as follows: base 10, auxiliary positioning hole 11, bracket 12, anti-slip pad 13, positioning module 20, support plate 21, telescopic rod 22, positioning pin 23, worm gear 24, turbine 25, first screw 26, hand-tightening handle 27, heat field adjustment component 30, heat conduction plate 31, heat dissipation fins 32, heat conduction groove 33, template alignment component 40, slide rail 41, slider 42, support arm 43, second screw 44, support block 45, hand-tightening block 46, wedge-shaped slot 47, stress-free clamping mechanism 50, support column 51, clamping beam 52, elastic pressure plate 53, silicone pad 54, angle adjustment disc 55. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] This application provides a combined welding fixture, which solves the problem that welding fixtures are difficult to meet the requirements of BGA ball-mounting process.

[0040] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0041] Example:

[0042] like Figures 1-3 As shown, this utility model provides a combined welding fixture, which includes: a base 10, a positioning module 20, and a heat field adjustment component 30;

[0043] The positioning module 20 includes: a support plate 21, a telescopic rod 22, and a positioning pin 23;

[0044] The support plate 21 is installed at the center above the base 10 by a plurality of evenly distributed telescopic rods 22. A plurality of positioning pins 23 are provided on the support plate 21, and the positioning pins 23 are symmetrically distributed along the longitudinal center line of the support plate 21.

[0045] The base 10 is equipped with a plurality of thermal field adjustment components 30 around its perimeter. Each thermal field adjustment component 30 includes a heat-conducting plate 31 and a heat dissipation fin 32.

[0046] The heat-conducting plate 31 is fixed on the base 10, and the heat dissipation fins 32 are arranged in a wave-like pattern on the outer side of the heat-conducting plate 31. Multiple heat-conducting grooves 33 are opened on the inner side of the heat-conducting plate 31.

[0047] like Figure 1 , Figure 2 As shown, the top of the locating pin 23 is tapered.

[0048] like Figure 3 As shown, the heat-conducting grooves 33 are arranged in parallel.

[0049] like Figure 2 As shown, the positioning module 20 also includes: a worm gear 24 and a turbine 25;

[0050] The worm gear 24 is horizontally positioned, with both ends connected to the bearings of the base 10.

[0051] The worm gear 25 is vertically arranged and connected to the base 10 bearing;

[0052] The worm gear 25 meshes with the worm 24;

[0053] A first screw 26 is provided at the center of the lower part of the support plate 21, and a threaded hole matching the first screw 26 is opened at the axis of the worm gear 25. The first screw 26 passes through the base 10 and is threadedly connected to the worm gear 25.

[0054] The outer end of the worm 24 extends to the outside of the base 10, and a hand-tightening handle 27 is installed on the outer end of the worm 21.

[0055] The support plate 21 can be raised and lowered by rotating the hand crank 27.

[0056] like Figure 1 , Figure 4 As shown, a pair of template alignment components 40 are provided on both sides of the base 10;

[0057] The template alignment assembly 40 includes: a slide rail 41, a slider 42, a support arm 43, and a second screw 44;

[0058] The slide rail 41 is installed on both sides of the base 10. The slider 42 is slidably connected to the slide rail 41. The support arm 43 is fixed on the slider 42. The outer end of the slide rail 41 is provided with a support block 45. The support block 45 has a screw hole. The second screw 44 is threadedly connected to the screw hole. The inner end of the second screw 44 is connected to the bearing of the slider 42. The outer end of the second screw 44 extends to the outside of the support block 45 and is connected to the hand-tightening block 46. Rotating the hand-tightening block 46 can finely adjust the position of the support arm 43.

[0059] The free end of the support arm 43 is provided with a wedge-shaped groove 47 for fixing the welding template.

[0060] like Figure 1 , Figure 5 As shown, a stress-free clamping mechanism 50 is installed on the base 10;

[0061] The stress-free clamping mechanism 50 includes: a support column 51, a clamping beam 52, an elastic pressure plate 53, and a silicone pad 54;

[0062] The bottom end of the support column 51 is mounted on the base 10, and the top end of the support column 51 is hinged to one end of the clamping beam 52. Several elastic pressure plates 53 are installed on the bottom surface of the support column 51, and silicone pads 54 are installed at the bottom end of the elastic pressure plates 53.

[0063] like Figure 1 , Figure 5 As shown, an angle adjustment disc 55 is provided at the bottom end of the support column 51, and the angle adjustment disc 55 is connected to the bearing of the base 10.

[0064] like Figure 1 , Figure 2 As shown, the upper surface of the base 10 is provided with a plurality of auxiliary positioning holes 11, which are distributed at the four corners of the base 10.

[0065] like Figure 1 As shown, the bottom surface of the base 10 is provided with a support 12, and the bottom of the support 12 is provided with an anti-slip pad 13. The anti-slip pad 13 is made of rubber, which enhances the friction between the support 12 and the workbench and prevents the base 10 from sliding during operation.

[0066] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0067] 1. In this embodiment of the utility model, the combined welding fixture uses a base as the basic frame of the entire fixture, providing a stable installation platform for each functional module and effectively avoiding fixture displacement caused by external vibration or impact; the positioning module adopts a design of multiple sets of precision-machined positioning pins, combined with the vertical adjustment function of the adjusting screw, which can adapt to the needs of workpieces of different sizes and heights, significantly improving the versatility of the fixture; the thermal field adjustment component, through the synergistic effect of the heat-conducting plate and heat dissipation fins, not only achieves uniform heat distribution, but also enhances the heat dissipation effect through the wave-shaped design of the heat dissipation fins, thereby effectively reducing the risk of welding defects caused by uneven temperature during the welding process, solving the problems of poor fixture applicability, complex operation and insufficient thermal field control capability in the prior art, and providing a more efficient, accurate and reliable solution for BGA ball-mounting process.

[0068] 2. In this embodiment of the utility model, the template alignment device achieves precise alignment of the welding template through the cooperation of the sliding arm and the fine-tuning screw, while the design of the locking mechanism ensures the stability of the template during operation.

[0069] 3. In this embodiment of the utility model, the stress-free clamping mechanism avoids direct pressure on the workpiece surface through the combination of elastic pressure plate and silicone pad, thereby reducing the risk of workpiece deformation caused by clamping stress during the welding process; in addition, the design of the angle adjustment plate further enhances the adaptability of the fixture to workpieces with complex shapes, enabling it to meet the needs of multi-angle and multi-directional welding.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0071] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A combined welding fixture, characterized in that, The combined welding fixture includes: a base (10), a positioning module (20), and a thermal field adjustment component (30); The positioning module (20) includes: a support plate (21), a telescopic rod (22), and a positioning pin (23); The support plate (21) is installed above the center of the base (10) by multiple evenly distributed telescopic rods (22). Multiple positioning pins (23) are provided on the support plate (21), and the positioning pins (23) are symmetrically distributed along the longitudinal center line of the support plate (21). The base (10) is equipped with a plurality of thermal field adjustment components (30) around its perimeter. The thermal field adjustment components (30) include: a heat-conducting plate (31) and heat dissipation fins (32); The heat-conducting plate (31) is fixed on the base (10), and the heat dissipation fins (32) are arranged in a wave-like pattern on the outer side of the heat-conducting plate (31). Multiple heat-conducting grooves (33) are opened on the inner side of the heat-conducting plate (31).

2. The combined welding fixture as described in claim 1, characterized in that, The top of the positioning pin (23) is tapered.

3. The combined welding fixture as described in claim 1, characterized in that, The heat-conducting grooves (33) are arranged in parallel.

4. The combined welding fixture as described in claim 1, characterized in that, The positioning module (20) further includes: a worm gear (24) and a turbine gear (25); The worm (24) is horizontally arranged, and both ends are connected to the bearings of the base (10); The worm gear (25) is vertically arranged and connected to the base (10) bearing; The worm gear (25) meshes with the worm (24); A first screw (26) is provided at the center of the lower part of the support plate (21), and a threaded hole matching the first screw (26) is opened at the axis of the worm wheel (25). The first screw (26) passes through the base (10) and is threadedly connected to the worm wheel (25). The outer end of the worm (24) extends to the outside of the base (10), and a hand-tightening handle (27) is installed on the outer end of the worm (21).

5. The combined welding fixture as described in claim 1, characterized in that, A pair of template alignment components (40) are provided on both sides of the base (10); The template alignment assembly (40) includes: a slide rail (41), a slider (42), a support arm (43), and a second screw (44); The slide rail (41) is installed on both sides of the base (10), the slider (42) is slidably connected to the slide rail (41), the support arm (43) is fixed on the slider (42), the outer end of the slide rail (41) is provided with a support block (45), the support block (45) is provided with a screw hole, the second screw (44) is threadedly connected to the screw hole, the inner end of the second screw (44) is connected to the bearing of the slider (42), and the outer end of the second screw (44) extends to the outside of the support block (45) and is connected to the hand-tightening block (46); The free end of the support arm (43) is provided with a wedge-shaped groove (47).

6. The combined welding fixture as described in claim 1, characterized in that, A stress-free clamping mechanism (50) is installed on the base (10); The stress-free clamping mechanism (50) includes: a support column (51), a clamping beam (52), an elastic pressure plate (53), and a silicone pad (54); The bottom end of the support column (51) is mounted on the base (10), the top end of the support column (51) is hinged to one end of the clamping beam (52), and a number of elastic pressure plates (53) are installed on the bottom surface of the support column (51). A silicone pad (54) is installed at the bottom end of the elastic pressure plate (53).

7. The combined welding fixture as described in claim 6, characterized in that, An angle adjustment disc (55) is provided at the bottom of the support column (51), and the angle adjustment disc (55) is connected to the base (10) bearing.

8. The combined welding fixture as described in claim 1, characterized in that, The upper surface of the base (10) is provided with a plurality of auxiliary positioning holes (11), which are distributed at the four corners of the base (10).

9. The combined welding fixture as described in claim 1, characterized in that, The base (10) has a support (12) on its bottom surface, and the bottom of the support (12) has an anti-slip pad (13).

10. The combined welding fixture as described in claim 9, characterized in that, The anti-slip mat (13) is made of rubber.

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