Welding tool
By using limiting components and welding assemblies in the welding fixture, the problems of unstable shape and reduced strength of the guide wire tip caused by manual welding were solved, and the stability and strength of the guide wire tip during the welding process were improved.
Patent Information
- Application Number
- CN202520167446.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-24
AI Technical Summary
The existing technology suffers from problems such as difficulty in guaranteeing the shape of the guide wire tip and reduced strength due to manual welding fixtures. The present invention provides a welding fixture that solves the problems of difficulty in guaranteeing the hemispherical shape and reduced strength caused by manual welding.
A welding fixture consisting of a base, a support platform, limiting components, and welding components is used. The limiting components restrict the relative positions of the spring and the core wire, ensuring their stability during the welding process, thereby guaranteeing the hemispherical shape and connection strength of the weld joint.
This achieves relative stability between the spring and the core wire during the welding process, ensuring the hemispherical shape and connection strength of the weld joint, and improving welding efficiency and quality.
Smart Images
Figure CN223734047U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device manufacturing technology, and in particular to a welding fixture. Background Technology
[0002] In interventional procedures, guidewires are frequently used to guide catheters or other interventional instruments to the target blood vessel location within the patient's body. To avoid puncturing or scratching the blood vessel during the guidewire's passage through the patient's arteries, the ideal guidewire tip should be hemispherical. This rounded shape effectively prevents damage to the blood vessel and also facilitates smoother guidewire movement. Currently, the mainstream guidewires on the market consist of a core wire and a spring. The spring is fitted onto the distal end of the core wire, and both ends are fixed by soldering.
[0003] However, existing soldering methods are performed manually by operators, usually using soldering irons. This is inefficient and makes it difficult to maintain the hemispherical shape of the guide wire tip. During soldering, the guide wire is easily moved or shaken, causing the relative position of the spring and the core wire to shift, affecting the solidification of the solder. Soldering is a crystallization process, and external forces during this process can change the crystallization conditions, resulting in coarse crystals and causing "cold soldering." This results in a dull, bean curd-like surface and a loose internal structure, which is prone to air gaps and cracks, leading to reduced solder joint strength.
[0004] Therefore, it is urgent to study a welding fixture to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a welding fixture to solve the problems of difficulty in ensuring the hemispherical shape and reduced strength caused by manual welding in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] Welding fixtures for welding springs and core wires include:
[0008] Base;
[0009] A support platform, wherein a first support groove is provided on the support platform, and the first support groove is used to support the spring;
[0010] A limiting member is provided on the support platform and has a limiting part for limiting the concentric arrangement of the core wire and the spring. The end of the limiting member is used to abut against the end of the spring to limit the position of the spring.
[0011] A welding assembly is provided on the base, and its welding part is located on the extension line of the first bearing groove, and can be close to or far from the first bearing groove.
[0012] As an optional technical solution for welding fixtures, the limiting member includes a limiting body and a mating part disposed on one side of the limiting body. The width of the limiting body is greater than the width of the mating part. The mating part is placed in the first bearing groove. The end of the limiting body is used to abut against the spring.
[0013] As an optional technical solution for welding fixtures, the mating part is adjustablely positioned in the first bearing groove.
[0014] As an optional technical solution for welding fixtures, the mating part can slide along the axial direction of the first bearing groove under the action of external force, and can be stopped at any position by the friction between the mating part and the side wall of the first bearing groove; wherein,
[0015] The limiting member is sheet-shaped, and the mating part is formed by stamping the limiting member. The outer contour of the mating part matches the contour of the first bearing groove; or,
[0016] The mating part is a strip-shaped block protruding from the limiting body, and the outline of the cross-section of the strip-shaped block matches the outline of the first bearing groove.
[0017] As an optional technical solution for welding fixtures, the support platform has a first scale, which is located on the side of the first support groove. The first scale is used to indicate the relative position of the limiting member and the support platform.
[0018] As an optional technical solution for welding fixtures, the limiting part is a second bearing groove formed by stamping the limiting member, and the second bearing groove and the first bearing groove are arranged concentrically.
[0019] As an optional technical solution for welding fixtures, the distance between the bottom of the second bearing groove and the outer wall of the mating part is L1, the difference in outer diameter between the spring and the core wire is L2, and L1 = 1 / 2 * L2.
[0020] As an optional technical solution for welding fixtures, the welding assembly includes a welding component and a moving component. The moving component is movably disposed on the base to move closer to or further away from the support platform. The welding component is disposed on the moving component and can move synchronously with the moving component. The end of the welding component facing the support platform forms the welding portion.
[0021] As an optional technical solution for welding fixtures, the welding assembly further includes a welding seat, a rack and a gear. The welding seat is disposed on the base, the rack is disposed on the welding seat, the moving part is slidably disposed on the welding seat, and the gear is rotatably disposed on the moving part and meshes with the rack.
[0022] As an optional technical solution for welding fixtures, the welding seat is provided with a second scale, which is located next to the rack and is used to indicate the relative position of the moving part and the welding seat.
[0023] As an optional technical solution for welding fixtures, the welding component is a hot air gun or a soldering iron.
[0024] The beneficial effects of this utility model are as follows:
[0025] This utility model provides a welding fixture, which includes a base, a support platform, a limiting member, and a welding assembly. The support platform has a first supporting groove for supporting a spring. The limiting member is disposed on the support platform and can abut against the end of the spring. The limiting member also has a limiting part for limiting the core wire to restrict the position of the core wire. This allows the welding assembly to maintain relative stability between the spring and the core wire during the welding process, which helps to ensure the hemispherical shape of the weld point and the connection strength between the weld point, the spring, and the core wire. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the welding fixture with a spring in an embodiment of this utility model;
[0028] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0029] Figure 3 for Figure 1 Enlarged view of point B in the middle;
[0030] Figure 4 This is a partial structural schematic diagram of the welding fixture in an embodiment of this utility model;
[0031] Figure 5 This is a schematic diagram of the welding assembly in an embodiment of the present invention.
[0032] In the picture:
[0033] 1000, Spring; 2000, Core Wire;
[0034] 100. Base;
[0035] 200. Support platform; 210. First support groove; 220. First scale;
[0036] 300. Limiting component; 310. Limiting body; 320. Mating part; 330. Second bearing groove;
[0037] 400. Welding assembly; 410. Welded part; 420. Moving part; 430. Welding seat; 431. Second scale; 440. Rack; 450. Knob. Detailed Implementation
[0038] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.
[0039] In this application, the terms "comprising," "including," "having," 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 limitation, 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 that element.
[0040] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.
[0041] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.
[0042] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values not using relative terms should also be disclosed as specific values with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.
[0043] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.
[0044] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.
[0045] like Figures 1 to 5 As shown, this embodiment provides a welding fixture for welding a spring 1000 and a core wire 2000 to form a hemispherical solder at the end of the core wire 2000. The welding fixture includes a base 100, a support platform 200, a limiting member 300, and a welding assembly 400. The support platform 200 has a first support groove 210 for supporting the spring 1000. The limiting member 300 is disposed on the support platform 200 and has a limiting portion for limiting the concentric arrangement of the core wire 2000 and the spring 1000. The end of the limiting member 300 abuts against the end of the spring 1000 to restrict the position of the spring 1000. The welding assembly 400 is disposed on the base 100, and its welding portion is located on the extension line of the first support groove 210, and can be close to or away from the first support groove 210.
[0046] The above configuration ensures the relative positions of the spring 1000 and the support platform 200, as well as the relative positions of the core wire 2000 and the limiting member 300. This ensures that the spring 1000 and the core wire 2000 remain relatively stable during the welding process, which in turn helps to ensure the hemispherical shape of the weld joint and the connection strength between the weld joint, the spring 1000, and the core wire 2000.
[0047] The limiting member 300 includes a limiting body 310 and a mating portion 320 disposed on one side of the limiting body 310. The width of the limiting body 310 is greater than the width of the mating portion 320. The mating portion 320 is placed in the first bearing groove 210, and the end of the limiting body 310 is used to abut against the spring 1000. This arrangement allows the limiting member 300 to move through the larger limiting body 310, facilitating placement and removal, while the smaller size of the mating portion 320 makes it easier to ensure machining accuracy.
[0048] To accommodate springs 1000 of different sizes, in some embodiments, the mating part 320 is adjustablely positioned in the first bearing groove 210, so that the position of the limiting member 300 relative to the bearing platform 200 is adjustable, thereby limiting the springs 1000 at different positions.
[0049] In some embodiments, the mating part 320 can slide along the axial direction of the first bearing groove 210 under the action of external force, and can be stopped at any position by the friction between the mating part 320 and the side wall of the first bearing groove 210. In use, the relative positional relationship between the limiting member 300 and the bearing platform 200 can be adjusted by manually dragging the limiting member 300; when the external force is lost, the limiting member 300 and the bearing platform 200 remain relatively fixed, with a simple structure and convenient adjustment.
[0050] Regarding the forming of the mating part 320, in one embodiment of this example, the limiting member 300 is sheet-shaped, and the mating part 320 is formed by stamping the limiting member 300. The outer contour of the mating part 320 matches the contour of the first bearing groove 210. In another embodiment of this example, the mating part 320 is a strip-shaped block protruding from the limiting body 310, and the contour of the cross-section of the strip-shaped block matches the contour of the first bearing groove 210.
[0051] In other embodiments, the mating part 320 can be a protrusion, and the support platform 200 is provided with a plurality of grooves spaced apart along the axial direction of the first support groove 210. One protrusion is selectively inserted into one of the plurality of grooves to achieve relative fixation between the limiting member 300 and the support platform 200. In one embodiment of this invention, the cross-section of the protrusion is non-circular, and the shape of the groove is adapted to the cam; specifically, the cross-section of the cam is square, triangular, or elliptical. In another embodiment of this invention, the protrusion is a cylindrical structure, the cross-section of the groove is circular, and there are two protrusions, with two protrusions engaging with two adjacent grooves at a time.
[0052] Combination Figure 3 and Figure 4 As shown, the limiting part is a second bearing groove 330 formed by a stamped limiting member 300, and the second bearing groove 330 and the first bearing groove 210 are arranged concentrically. The second bearing groove 330 allows the core wire 2000 to be confined within it. Due to the friction between the core wire 2000 and the sidewall of the second bearing groove 330, the relative position between the core wire 2000 and the limiting member 300 will not change when no external force is applied. Furthermore, the relative position between the core wire 2000 and the limiting member 300 can be adjusted under the action of external force, thereby adjusting the relative position between the core wire 2000 and the spring 1000. In this embodiment, the core wire 2000 is located within the spring 1000, and the end of the core wire 2000 is located inside the spring 1000. The distance between the end of the core wire 2000 and the end of the spring 1000 is 1 to 2 times the wire diameter of the spring 1000. In other embodiments, the distance between the end of the core wire 2000 and the end of the spring 1000 is 0.1 mm to 0.2 mm.
[0053] In this process, the second bearing groove 330 and the mating part 320 can be simultaneously formed on the sheet-like limiting member 300 through a single stamping process, and the two are spaced apart about the stamping direction. The distance between the bottom of the second bearing groove 330 and the outer wall of the mating part 320 is L1, and the difference in outer diameter between the spring 1000 and the core wire 2000 is L2, where L1 = 1 / 2 * L2. The above process improves the manufacturing efficiency of the limiting member 300 and reduces the cost; at the same time, the above-mentioned dimensional constraints ensure that the core wire 2000, which is limited in the second bearing groove 330, and the spring 1000, which is limited in the first bearing groove 210, are arranged concentrically.
[0054] To ensure the accuracy of the adjustment of the limiting member 300, the support platform 200 has a first scale 220, which is located beside the first support groove 210. The first scale 220 is used to indicate the relative position of the limiting member 300 and the support platform 200. When adjusting the position of the limiting member 300, the first scale 220 can be referenced to ensure the distance the limiting member 300 moves and its relative position with the support platform 200.
[0055] Combination Figure 5 As shown, the welding assembly 400 includes a welding component 410 and a movable component 420. The movable component 420 is movably disposed on the base 100 to move closer to or further away from the support platform 200. The welding component 410 is disposed on the movable component 420 and can move synchronously with the movable component 420. The end of the welding component 410 facing the support platform 200 forms a welding portion. The movable component 420 can drive the welding component 410, thereby accommodating springs 1000 and core wires 2000 at different positions and enabling welding of guide wires of different types.
[0056] Specifically, the welding assembly 400 also includes a welding seat 430, a rack 440, and a gear. The welding seat 430 is disposed on the base 100, the rack 440 is disposed on the welding seat 430, the movable member 420 is slidably disposed on the welding seat 430, and the gear is rotatably disposed on the movable member 420 and meshes with the rack 440. This arrangement allows the movable member 420 to move closer to or further away from the support platform 200 through the interaction of the gear and rack 440. Furthermore, the gear can be replaced with a worm gear. The worm gear provides the movable member 420 with a self-locking function, preventing movement when not in operation and improving welding accuracy.
[0057] In some embodiments, the welding assembly 400 further includes a knob 450, which is coaxially connected to the gear for the operator to turn, thereby improving the convenience of gear adjustment.
[0058] To ensure adjustment accuracy, in some embodiments, a second scale 431 is provided on the welding base 430. The second scale 431 is located beside the rack 440 and is used to indicate the relative position of the moving member 420 and the welding base 430. The welding base 430 is cuboid in shape, the moving member 420 is located on the upper surface of the welding base 430, and the second scale 431 is located on the front side of the welding base 430, thus facilitating observation; at the same time, it reduces the width of the upper surface of the welding base 430.
[0059] In some embodiments, the welding component 410 is a hot air gun or a soldering iron; of course, it can also be other mechanisms that can generate heat, not limited to the examples above.
[0060] This embodiment also provides a welding method applied to the welding fixture in any of the above embodiments. The welding assembly method includes the following steps: first, applying flux, then placing the first solder ball, heating the first solder ball to melt it, and under the action of flux, the molten solder enters the gap between the core wire 2000 and the spring 1000; after cooling, placing the second solder ball, heating the second solder ball, and during the solidification process, the second molten solder ball is subjected to its own tension, and finally forms a hemispherical shape that protrudes outward from the welding assembly 400.
[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A welding fixture for welding a spring (1000) and a core wire (2000), characterized in that, The utility model relates to a spring welding assembly, comprising: a base (100); a bearing table (200) with a first bearing groove (210) for bearing the spring (1000); a limiting piece (300) provided on the bearing table (200) and having a limiting part for limiting the concentric arrangement of the core wire (2000) and the spring (1000), the end of the limiting piece (300) being used for abutting against the end of the spring (1000) to limit the position of the spring (1000); a welding assembly (400) provided on the base (100) and having a welding part located on the extension line of the first bearing groove (210) and capable of approaching or moving away from the first bearing groove (210).
2. The welding fixture of claim 1, wherein, The limiting piece (300) comprises a limiting body (310) and a matching part (320) provided on one side of the limiting body (310), the width of the limiting body (310) being greater than that of the matching part (320), the matching part (320) being placed in the first bearing groove (210), and the end of the limiting body (310) being used for abutting against the spring (1000).
3. The welding fixture of claim 2, wherein, The matching part (320) is adjustably provided in the first bearing groove (210).
4. The welding fixture of claim 3, wherein, The matching part (320) can slide along the axis direction of the first bearing groove (210) under the action of external force and can be stopped at any position by the friction force between the matching part (320) and the side wall of the first bearing groove (210); wherein, The limiting piece (300) is sheet-shaped, the matching part (320) is formed by stamping the limiting piece (300), and the outer contour of the matching part (320) matches the contour of the first bearing groove (210); or, The matching part (320) is a strip-shaped block protruding from the limiting body (310), and the contour of the cross section of the strip-shaped block matches the contour of the first bearing groove (210).
5. The welding fixture of claim 4, wherein, The bearing table (200) has a first scale (220) provided beside the first bearing groove (210), and the first scale (220) is used for showing the relative position of the limiting piece (300) and the bearing table (200).
6. The welding fixture of claim 4, wherein, The limiting part is a second bearing groove (330) formed by stamping the limiting piece (300), and the second bearing groove (330) and the first bearing groove (210) are arranged concentrically.
7. The welding fixture of claim 6, wherein, The distance between the groove bottom of the second bearing groove (330) and the outer side wall of the matching part (320) is L1, the difference between the outer diameters of the spring (1000) and the core wire (2000) is L2, and L1 = 1 / 2*L2.
8. The welding fixture of any of claims 1-7, wherein, The welding assembly (400) comprises a welding member (410) and a moving member (420), the moving member (420) is movably arranged on the base (100) to move close to or away from the bearing table (200), the welding member (410) is arranged on the moving member (420) and can move synchronously with the moving member (420), and the end of the welding member (410) towards the bearing table (200) forms the welding part.
9. The welding fixture of claim 8, wherein, The welding assembly (400) further comprises a welding seat (430), a rack (440) and a gear, the welding seat (430) is arranged on the base (100), the rack (440) is arranged on the welding seat (430), the moving member (420) is slidingly arranged on the welding seat (430), and the gear is rotatably arranged on the moving member (420) and engaged with the rack (440).
10. The welding fixture of claim 9, wherein, A second scale (431) is arranged on the welding seat (430), the second scale (431) is arranged beside the rack (440) and used to show the relative position of the moving member (420) and the welding seat (430).
11. The welding fixture of claim 8, wherein, The welding member (410) is a hot air gun or an electric soldering iron.