A kind of tooling

Abstract

The present invention provides a tool, comprising a bracket and a loading assembly arranged on the bracket; wherein the loading assembly comprises a loading part and a positioning part; the loading part is provided with a guide channel for passing a first workpiece and a second workpiece, and the second workpiece is sleeved outside the first workpiece; the guide channel comprises a first segment and a second segment which are sequentially connected and coaxially arranged along the axial direction; the inner diameter of the first segment matches the outer diameter of the first workpiece; the inner diameter of the second segment matches the outer diameter of the second workpiece; the positioning part is movably arranged on the loading part, and is used to keep the first workpiece and the second workpiece in a predetermined position. The first segment and the second segment are used to ensure the concentricity of the first workpiece and the second workpiece, thereby improving the final product qualification rate.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a tool. Background Art

[0002] Medical guidewires are common medical supplies used in vascular interventions. After entering the vascular cavity, they need to pass through the vascular lumen, branches and curved parts, and even through narrow parts to reach the target part. Therefore, the distal end of the guidewire needs to be designed as a rounded and soft structure. One processing method in the prior art is to process the distal end of the metal core wire into a tip structure, and to put a spring on the tip structure, and the distal end of the spring is coaxially welded to it. Since the tip structure of the core wire has a small diameter (generally less than 0.1 mm) and is soft, and the spring is also soft and small, there are problems such as the spring easily falling off and introducing foreign matter, the spring being deformed due to local force, and the relative position error between the tip structure and the spring resulting in poor concentricity between the two when the two are assembled, resulting in low welding efficiency and low pass rate. Summary of the invention

[0003] The object of the present invention is to provide a tooling for improving the welding efficiency and qualified rate of a core wire and a spring.

[0004] To achieve the above-mentioned purpose, the present invention provides a tool, comprising: a bracket and a loading assembly arranged on the bracket; wherein:

[0005] The loading assembly includes a loading part and a positioning part; the loading part is provided with a guide channel for passing a first workpiece and a second workpiece, and the second workpiece is sleeved on the outside of the first workpiece; the guide channel includes a first segment and a second segment which are sequentially connected along the axial direction and coaxially arranged; the inner diameter of the first segment matches the outer diameter of the first workpiece; the inner diameter of the second segment matches the outer diameter of the second workpiece; the positioning part can be movably arranged on the loading part, and is used to keep the first workpiece and the second workpiece in predetermined positions.

[0006] Optionally, the guide channel has relative inlet and outlet ends; the guide channel also includes a third segment and a fourth segment, and the third segment, the fourth segment, the first segment and the second segment are arranged in sequence from the inlet end to the outlet end; the minimum inner diameter of the third segment is not less than the outer diameter of the second workpiece, the inner diameter of the fourth segment decreases in sequence from the inlet end to the outlet end, and the maximum inner diameter of the fourth segment is not less than the outer diameter of the second workpiece.

[0007] Optionally, the guide channel has an opening in the circumferential direction, and in the axial direction of the guide channel, the opening extends from the starting end of the fourth segment to the middle of the second segment; the positioning portion is arranged at the opening, for pressing against the first workpiece and the second workpiece to keep the first workpiece and the second workpiece in a predetermined position.

[0008] Optionally, the positioning portion includes two sub-positioning portions, wherein one of the sub-positioning portions is used to keep the first workpiece at a predetermined position, and the other sub-positioning portion is used to keep the second workpiece at a predetermined position; or,

[0009] The two sub-positioning parts are arranged at intervals.

[0010] Optionally, a plurality of positioning holes are provided on the loading portion;

[0011] The sub-positioning part includes a pressure block, a guide column, a limit piece and an elastic member; wherein the pressure block is arranged on the loading part and covers the positioning hole; the guide column has a first end and a second end axially opposite to each other, the first end is arranged on the pressure block, the second end passes through the positioning hole and extends to the outside of the loading part, and the guide column can move axially along the positioning hole; the limit piece is arranged on the second end of the guide column; the elastic member is arranged between the loading part and the limit piece, and is in a compressed state to press the pressure block against the first workpiece or the second workpiece.

[0012] Optionally, the loading portion includes a bottom plate, a first cover plate, and a second cover plate, and the first cover plate and the second cover plate are arranged on the bottom plate at intervals along the direction from the introduction end to the outlet end of the guide channel; the bottom plate has a first groove, the first cover plate has a second groove, and the second cover plate has a third groove; the second groove is spliced ​​with a part of the first groove to form the third section of the guide channel, and the third groove is spliced ​​with a part of the first groove to form a part of the second section of the guide channel; or,

[0013] The base plate includes a first sub-base plate and a second sub-base plate spliced ​​to each other; the first cover plate is arranged on the first sub-base plate, and the second cover plate is arranged on the second sub-base plate; the hardness of the material of the first sub-base plate is greater than the hardness of the material of the second sub-base plate and the second cover plate.

[0014] Optionally, the tooling further comprises a first limiting mechanism disposed on the bracket; the first limiting mechanism is used to limit the length of the first workpiece and the second workpiece extending out of the guide passage from the lead-out end of the guide passage.

[0015] Optionally, the loading assembly has a first state and a second state; the loading assembly is rotatably disposed on the bracket and can rotate relative to the bracket under the action of an external force to switch between the first state and the second state;

[0016] The first limiting mechanism is also used to keep the loading assembly in the first state;

[0017] The tool also includes a second limiting mechanism, which is arranged on the bracket and is used to keep the loading assembly in the second state.

[0018] Optionally, the first limiting mechanism includes a first baffle and a second baffle; the first baffle is connected to the bracket, and the second baffle is arranged on the first baffle; a limiting groove is arranged on the surface of the second baffle close to the loading assembly;

[0019] When the loading assembly is in the first state, the loading assembly is pressed against the first baffle plate, and the outlet end of the guide channel is connected to the limiting groove; the bottom wall of the limiting groove is used to abut against the first workpiece, and the surface of the second baffle plate close to the loading assembly is used to abut against the second workpiece; or,

[0020] A step surface facing the loading assembly is provided on the side wall of the limiting groove, and the step surface is used to abut against the second workpiece; or,

[0021] The second baffle is movably disposed on the first baffle, and can move under the action of an external force to approach or move away from the loading assembly.

[0022] Optionally, the loading portion includes a plurality of the guide channels arranged in parallel.

[0023] Compared with the prior art, the tooling of the present invention has the following advantages:

[0024] The aforementioned tooling includes a bracket and a loading assembly arranged on the bracket; wherein the loading assembly includes a loading part and a positioning part; the loading part is provided with a guide channel for passing a first workpiece and a second workpiece, the second workpiece being mounted outside the first workpiece; the guide channel includes a first segment and a second segment which are sequentially connected and coaxially arranged along the axial direction, the inner diameter of the first segment matches the outer diameter of the first workpiece, and the inner diameter of the second segment matches the outer diameter of the second workpiece; the positioning part can be movably arranged on the loading part and is used to keep the first workpiece and the second workpiece in a predetermined position. The tooling can be applied to the welding operation of the first workpiece and the second workpiece, the first workpiece and the second workpiece are loaded by using the guide channel, and the first segment and the second segment of the guide channel are designed so that when a part of the first workpiece is arranged at the first segment and a part of the second workpiece is arranged at the second segment, the concentricity of the first workpiece and the second workpiece is ensured, thereby improving the welding qualification rate and production efficiency. In particular, when the loading portion has a plurality of guide channels arranged in parallel, the operator can use one tool to perform welding operations on a plurality of core wires and springs at the same time, thereby further improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation of the present invention.

[0026] Figure 1 is a schematic structural diagram of a tool provided according to an embodiment of the present invention, in which the loading assembly is in a first state;

[0027] Figure 2 yes Figure 1 a rear view of the tooling shown;

[0028] Figure 3 yes Figure 1 A left side view of the tooling shown;

[0029] Figure 4 yes Figure 1 a top view of the tooling shown;

[0030] Figure 5 yes Figure 1 A top view of the tooling shown, in which the first cover plate, the second cover plate, the positioning portion and the second limiting mechanism are not shown;

[0031] Figure 6 yes Figure 5 A schematic diagram of the structure of the first groove on the bottom plate of the tooling shown;

[0032] Figure 7is a schematic structural diagram of a tool provided according to an embodiment of the present invention, in which the loading assembly is in a second state;

[0033] Figure 8 yes Figure 7 A left side view of the tooling shown;

[0034] Fig. 9 is a schematic diagram of the structure of a tool provided according to an embodiment of the present invention, and mainly shows a schematic diagram of the cooperation between the sub-positioning part and the bottom plate;

[0035] Fig.10 1 is a schematic diagram of a partial structure of a tool provided according to an embodiment of the present invention, and mainly shows a schematic diagram of the first limiting mechanism limiting the length of the distal end of the core wire and the distal end of the spring extending out of the guide channel;

[0036] Fig.11 1 is a schematic diagram of a partial structure of a tool provided according to an embodiment of the present invention, and mainly shows a schematic diagram of the first limiting mechanism limiting the length of the distal end of the core wire and the distal end of the spring extending out of the guide channel, and Fig.10 The difference lies in the structure of the limit slot.

[0037] [Description of reference numerals is as follows]:

[0038] 10-first workpiece, 20-second workpiece;

[0039] 1000-Stand;

[0040] 1100-sub bracket;

[0041] 2000-loading components;

[0042] 2100- loading unit;

[0043] 2101-Guide channel;

[0044] 2110-base plate;

[0045] 2111a-Part 1, 2111b-Part 2, 2111c-Part 3, 2111d-Part 4;

[0046] 2112-first sub-base plate, 2113-second sub-base plate, 2114-positioning hole;

[0047] 2120-first cover plate;

[0048] 2130-second cover plate;

[0049] 2210-sub-positioning unit;

[0050] 2211-pressing block, 2212-guide column, 2213-limiting member, 2214-elastic member, 2215-operating member, 2216-fixing seat;

[0051] 3000-the first limit mechanism;

[0052] 3100-first baffle, 3200-second baffle, 3210-limiting groove;

[0053] 4100-third baffle;

[0054] 5000-rotating shaft;

[0055] 6000-base. DETAILED DESCRIPTION

[0056] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the present embodiment only illustrate the basic concept of the present invention in a schematic manner, and only the components related to the present invention are shown in the figure instead of being drawn according to the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be a random change, and the component layout type may also be more complicated.

[0057] In addition, each embodiment of the following description has one or more technical features, but this does not mean that the user of the present invention must implement all the technical features in any embodiment at the same time, or can only implement part or all of the technical features in different embodiments separately. In other words, under the premise that implementation is possible, those skilled in the art can selectively implement part or all of the technical features in any embodiment according to the disclosure of the present invention and according to the design specifications or implementation requirements, or selectively implement a combination of part or all of the technical features in multiple embodiments, thereby increasing the flexibility of the implementation of the present invention.

[0058] As used in this specification, the singular forms "a", "an", and "the" include plural objects, and the plural form "plurality" includes more than two objects, unless the content clearly indicates otherwise. As used in this specification, the term "or" is generally used to include the meaning of "and / or", unless the content clearly indicates otherwise, and the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be a connection between the internal parts of two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0059] In order to make the purpose, advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are all in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar reference numerals in the drawings represent the same or similar components.

[0060] The tooling can be used in a welding operation between a first workpiece and a second workpiece, wherein the second workpiece is sleeved outside the first workpiece. In the embodiment of the present invention, the first workpiece is a core wire 10 and the second workpiece is a spring 20 (please refer to Fig. 9 ), the two are welded to form a medical guide wire as an example for introduction, but it should not constitute a limitation to the present invention.

[0061] Please refer to Figure 1 The tooling includes a bracket 1000 and a loading assembly 2000. The loading assembly 2000 is arranged on the bracket 1000 and includes a loading portion 2100 and a positioning portion. The loading portion 2100 is provided with a guide channel 2101, and the guide channel 2101 is used to pass the core wire 10 and the spring 20. The guide channel 2101 includes a first segment and a second segment that are axially connected and coaxially arranged. The inner diameter of the first segment matches the outer diameter of the core wire 10, and the inner diameter of the second segment matches the outer diameter of the spring 20. The positioning portion is movably arranged on the loading portion and is used to keep the core wire 10 and the spring 20 in a predetermined position.

[0062] When the core wire 10 and the spring 20 are welded by the tooling, the core wire 10 is partially located in the first segment, and the spring 20 is partially located in the second segment, so as to ensure the concentricity of the two and improve the welding quality. In this embodiment, it is preferred that a plurality of guide channels 2101 are provided on the loading portion 2100 to load a plurality of the core wires 10 and a plurality of the springs 20 at the same time, so that the welding operation can be performed in batches, thereby improving production efficiency.

[0063] In more detail, the guide channel 2101 has an opposite inlet end and an outlet end. The guide channel 2101 also includes a third segment and a fourth segment. The third segment, the fourth segment, the first segment and the second segment are arranged in sequence from the inlet end to the outlet end. The minimum inner diameter of the third segment is not less than the outer diameter of the spring 20, the inner diameter of the fourth segment decreases in sequence from the inlet end to the outlet end, and the maximum inner diameter of the fourth segment is not less than the outer diameter of the spring 20.

[0064] The guide channel 2101 has an opening in the circumferential direction, and in the axial direction of the guide channel 2101, the opening extends from the starting end of the fourth segment to the middle of the second segment. Here, the opening end of the fourth segment is the junction of the third segment and the fourth segment. The middle of the second segment is the position between the junction of the second segment and the first segment and the end of the second segment away from the first segment, which is determined according to actual needs.

[0065] With such arrangement, on the one hand, when the core wire 10 and the spring 20 are arranged in the guide channel 2101, the core wire 10 and the spring 20 can be exposed to the outside of the loading part at the opening. At this time, the positioning part can be arranged at the opening, for applying a pressing force to the core wire 10 and the spring 20 to press against the core wire 10 and the spring 20, so that the core wire 10 and the spring 20 are kept in a predetermined position. On the other hand, when the positioning part is not locked (i.e., no pressing force is applied to the core wire 10 and the spring 20), the spring 20 can smoothly pass through the fourth segment and the first segment and enter the second segment under the action of the opening. Specifically, when the operator introduces the core wire 10 and the spring 20 into the guide channel 2101, the core wire 10 and the spring 20 first enter from the introduction end, and the core wire 10 can be moved forward to the predetermined position along the third segment, the fourth segment, the first segment and the second segment in sequence; when the spring 20 begins to enter the fourth segment, the inner diameter of the fourth segment gradually decreases, and the inner diameter of the first segment is also smaller than the outer diameter of the spring 20, but due to the existence of the opening, part of the spring 20 is located outside the guide channel 2101, so it can still pass through the fourth segment and the first segment and reach the junction of the first segment and the second segment. After that, the spring 20 can re-enter the guide channel 2101 and continue to advance until it reaches the predetermined position. Here, the third segment of the guide channel 2101 is designed as a tapered structure that tapers from the introduction end to the outlet end to facilitate the introduction of the core wire 10 and the spring 20.

[0066] Furthermore, in actual operation, after the distal ends of the core wire 10 and the spring 20 reach the lead-out end, they need to extend out of the guide channel 2101 to avoid the core wire 10, the spring 20 and the loading portion from being welded by mistake. Here, the length of the distal ends of the core wire 10 and the spring 20 extending out of the guide channel 2101 is a predetermined value, so the tooling also includes a first limiting mechanism 3000, which is used to limit the length of the distal ends of the core wire 10 and the spring 20 extending out of the guide channel 2101. The "distal end of the core wire 10" mentioned here refers to the end of the core wire 10 that first enters the human body when the medical guide wire is actually used after the core wire 10 and the spring 20 are welded to form the medical guide wire. Similarly, the "distal end of the spring 20" refers to the end of the spring 20 that first enters the human body when the medical guide wire is actually used.

[0067] Further, for the convenience of operation, the loading assembly 2000 has a first state and a second state, and the loading part is rotatably arranged on the bracket 1000, so that the loading assembly 2000 can rotate under the action of external force to switch between the first state and the second state. When the loading assembly 2000 is in the first state, the operator can load the core wire 10 and the spring 20 to be welded on the tooling, or remove the welded medical guide wire (i.e., the core wire 10 and the spring 20 welded together) from the tooling. When the loading assembly 2000 is in the second state, the operator can perform welding operations on the core wire 10 and the spring 20 to be welded. That is, when the loading assembly 2000 is in the first state, the tooling is located at the loading and unloading station, and when the loading assembly 2000 is in the second state, the tooling is located at the welding station.

[0068] Generally speaking, when the guide channel 2101 is arranged horizontally, it is convenient to load and unload materials, and when the core wire 10 and the spring 20 are arranged vertically, it is convenient to perform welding operations. Figure 1 , Figure 7 and Figure 8 When the loading assembly 2000 is in the first state, the loading part is arranged horizontally, and when the loading assembly 2000 is in the second state, the loading part is arranged vertically. It can be understood that the "horizontal arrangement" includes both the situation that the loading part is completely parallel to the horizontal plane and the situation that the loading part is approximately parallel to the horizontal plane. Similarly, the "vertical arrangement" includes both the situation that the loading part is perpendicular to the horizontal plane and the situation that the loading part is approximately perpendicular to the horizontal plane.

[0069] In this embodiment, the tooling further includes a second limiting mechanism 4000. When the loading assembly 2000 is in the first state, the operator can apply a force to the loading assembly 2000 to rotate the loading assembly 2000 in the first direction to switch to the second state, and the second limiting mechanism 4000 is used to limit the angle of rotation of the loading assembly 2000 in the first direction, so as to keep the loading assembly 2000 in the second state after the loading assembly 2000 reaches the second state. Conversely, when the operator applies a force to the loading assembly 2000 to rotate the loading assembly 2000 in the second direction, the loading assembly 2000 can be switched from the second state to the first state, and at this time, the first limiting mechanism 3000 is also used to limit the angle of rotation of the loading assembly 2000 in the second direction, so as to keep the loading assembly 2000 in the first state after the loading assembly 2000 reaches the first state. Here, the second direction is opposite to the first direction. Figure 1 and Figure 7 As shown in the example, the first direction is clockwise, and the second direction is counterclockwise.

[0070] That is to say, when the tooling provided by the present invention performs a welding operation on the core wire 10 and the spring 20, the loading assembly 2000 is first adjusted to the first state, and then the core wire 10 and the spring 20 to be welded are transported to their respective predetermined positions through the guide channel 2101, and the positioning part is used to position the two, so that the core wire 10 and the spring 20 are kept in their respective predetermined positions, thereby achieving the positioning of the core wire 10 and the spring 20. Afterwards, the tooling is adjusted to the second state to perform the welding operation. In this way, it can be avoided that the spring 20 falls off, or the core wire 10 and the spring 20 move relative to each other and deviate from their respective predetermined positions, thereby causing the positions of the two to be inaccurate and affecting the welding pass rate.

[0071] Next, the detailed structure of the tooling will be introduced in this article. It should be understood that what is described below is only the preferred structure of the tooling and is not a must-have, and therefore should not limit the present invention.

[0072] Please refer to Figures 1 to 6In a disclosed embodiment, the loading part includes a bottom plate 2110, a first cover plate 2120 and a second cover plate 2130. Along the direction from the inlet end to the outlet end of the guide channel 2101, the first cover plate 2120 and the second cover plate 2130 are arranged on the bottom plate 2110 at intervals. The bottom plate 2130 is provided with a first groove, the first cover plate 2120 is provided with a second groove, and the third cover plate 2130 is provided with a third groove. The first groove, the second groove and the third groove are used to constitute the guide channel 2101. In detail, the first groove includes a first part 2111a, a second part 2111b, a third part 2111c and a fourth part 2111d arranged in sequence from the inlet end to the outlet end. Among them, the first part 2111a and the second groove are spliced ​​to form the third segment of the guide channel 2101, so that the first part 2111a is preferably a tapered structure with an inner diameter gradually decreasing along the direction from the inlet end to the outlet end. The second portion 2111b constitutes the fourth segment of the guide channel 2101. The third portion 2111c constitutes the first segment of the guide channel 2101. The area of ​​the fourth portion 2111d close to the third portion 2111c constitutes the area covered by the opening in the second segment of the guide channel 2101, and the area of ​​the fourth portion 2111d away from the third portion 2111c is spliced ​​with the third groove to constitute another part (i.e., the part not covered by the opening) of the second segment. In practice, the fourth portion 2111d is a rounded structure with one end connecting the third portion 2111c and the first portion 2111a.

[0073] In this embodiment, the base plate 2110, the first cover plate 2120 and the second cover plate 2130 can be an integrated structure or a split structure. Preferably, the base plate 2110 includes a first sub-base plate 2112 and a second sub-base plate 2113 that are spliced ​​to each other, and the first cover plate 2120 is arranged on the first sub-base plate 2112, and the second cover plate 2130 is arranged on the second sub-base plate 2113. In addition, the hardness of the material of the first sub-base plate 2112 is less than the hardness of the material of the second sub-base plate 2113 and the second cover plate 2130. This is because, on the one hand, the length of the guide channel 2101 is relatively long, and the first sub-base plate 2212 is made of a material with a relatively low hardness, which can reduce the damage to the surface of the core wire 10 when the core wire 10 moves in the guide channel 2101. On the other hand, the positioning performance of the material with lower hardness is relatively poor, so the second sub-base plate 2113 and the second cover plate 2130 with higher hardness are selected to facilitate the guidance and positioning of the core wire 10 and the spring 20. Optionally, the material of the first sub-base plate 2212 can be a polymer material, such as PTFE (polytetrafluoroethylene), and the material of the second sub-base plate 2213 and the second cover plate 2130 can be metal copper.

[0074] The positioning portion preferably includes two sub-positioning portions 2110, one of which is arranged at least corresponding to the first segment of the guide channel 2101, and is used to press against the core wire 10, so as to keep the core wire 10 in a predetermined position. The other sub-positioning portion 2120 is arranged corresponding to the second segment (the portion located at the opening) of the guide channel 2101, and is used to press against the spring 20, so as to keep the spring 20 in a predetermined position. The two sub-positioning portions 2110 are used to independently press and position the core wire 10 and the spring 20, respectively, which is simple to operate, and can shorten the loading time and improve the production efficiency. For the convenience of description, the setting position of the one sub-positioning portion 2110 is referred to as the first positioning area, and the setting position of the other sub-positioning portion 2110 is referred to as the second positioning area, so that the opening at the first positioning area and the second positioning area can be covered by the positioning portion.

[0075] Please focus on Fig. 9, a plurality of positioning holes 2114 are provided on the bottom plate 2110. The sub-positioning portion 2210 includes a pressing block 2211, a guide column 2212, a limiting member 2213 and an elastic member 2214. The pressing block 2211 is arranged on a corresponding positioning area, such as the first positioning area, and covers the positioning hole 2113 corresponding to the first positioning area. The guide column 2212 has a first end and a second end axially opposite to each other, the first end is arranged on the pressing block 2211, the second end passes through the positioning hole 2113, and extends to a side of the bottom plate 2110 away from the pressing block 2211, and the guide column 2212 can move axially along the positioning hole 2113. The limiting member 2213 is arranged on the second end of the guide column 2212. The elastic member 2214 is arranged between the limiting member 2213 and the base plate 2110, and is in a compressed state to store elastic potential energy so that the pressure block 2211 is pressed against the core wire 10 (taking the sub-positioning portion 2210 being arranged in the first positioning area as an example. For the sub-positioning portion 2210 arranged in the second positioning area, the pressure block 2211 is pressed against the spring 20).

[0076] So, Fig. 9 Taking the position shown as an example, when the pressing block 2211 is acted upon by an external force, and the external force is able to overcome the elastic potential energy of the elastic member 2214, the pressing block 2211 moves in a direction away from the bottom plate 2110 and no longer presses against the core wire 10 (when the core wire 10 is loaded in the guide channel 2101), so as to release the positioning of the core wire 10; at the same time, the elastic member 2214 is further compressed to increase its stored elastic potential energy. After the external force is released, the elastic member 2214 releases part of the elastic potential energy, so that the pressing block 2211 moves toward the bottom plate 2110 until it presses against the core wire 10 again. The elastic member 2214 includes but is not limited to a spring.

[0077] Furthermore, the stopper 2213 can be a nut, which can be threadedly matched with the guide post 2212 to easily and quickly adjust its position on the guide post 2212 to adjust the elastic potential energy stored in the elastic member 2212, so as to adapt to the core wire 10 and the spring 20 of different specifications, thereby improving the universality of the tooling. Moreover, the elastic potential energy of the elastic member 2213 is used to compress the core wire 10 and the spring 20, effectively avoiding the unfavorable situation that the core wire 10 or the spring 20 is crushed or deformed due to excessive pressure.

[0078] Preferably, please refer to Figure 1In order to facilitate the application of the external force to the pressing block 2211, the sub-positioning portion 2210 further includes an operating member 2215, which is arranged on the side of the pressing block 2211 away from the bottom plate 2110. Optionally, the sub-positioning portion 2210 further includes a fixing seat 2216, and the fixing seat 2216 is connected to the corresponding cover plate. For example, for the sub-positioning portion 2210 arranged in the first positioning area, the fixing seat 2216 is connected to the first cover plate 2120. Preferably, a threaded hole is provided on the fixing seat 2216, and the operating member 2215 is a bolt, which passes through the threaded hole and is connected to the pressing block 2211. The operator can apply the external force to the pressing block 2211 by rotating the bolt to release the positioning of the pressing block 2211 on the core wire 10, and the pressing block 2211 can also be kept in a released state by the threaded cooperation between the bolt and the threaded hole, so as to facilitate loading and unloading.

[0079] It should be understood by those skilled in the art that when the core wire 10 and the spring 20 are pushed to the predetermined position along the guide channel 2101, it is difficult for the spring 20 to ensure synchronous movement with the core wire 10, so that the core wire 10 is often delivered to its predetermined position while the spring 20 has not yet reached its predetermined position. In view of this, the two sub-positioning portions 2110 are arranged at intervals, so that the opening of the guide channel 2101 is located in the area between the two sub-positioning portions 2110 without being blocked, and the operator can apply force to the spring 20 in this area to adjust the position of the spring 20 so that the spring 20 reaches its predetermined position.

[0080] As mentioned above, the loading assembly 2000 is rotatably disposed on the bracket 1000. Please refer to Figure 1 and Figure 3 , the bracket 1000 includes two sub-brackets 1100 arranged opposite to each other. The opposite sides of the loading part 2100 are rotatably mounted on the two sub-brackets 1100 through the rotating shaft 5000 respectively. From the horizontal direction, the first limiting mechanism 3000 and the second limiting mechanism are respectively located on the opposite sides of the rotating shaft 5000. Preferably, the first limiting mechanism 3000 is at least partially in the same horizontal plane as the rotating shaft 5000, so as to support the loading assembly 2000 together with the rotating shaft 5000, so that the loading assembly 2000 is maintained in the first state (i.e., maintained in a horizontally arranged state). At the same time, the second limiting mechanism is arranged up and down with the rotating shaft 5000, so as to support the loading assembly 2000 together with the rotating shaft 5000, and maintain the loading assembly 2000 in the second state (i.e., maintained in a vertically arranged state).

[0081] In more detail, the first limiting mechanism 3000 includes a first baffle 3100 arranged horizontally, and a second baffle 3200 arranged on the upper surface of the first baffle 3100. Figure 1 Taking the orientation shown as an example, the first baffle 3100 is located on the left side of the rotating shaft 5000, and the opposite ends of the first baffle 3100 are respectively connected to the two sub-brackets 1100. When the loading assembly 2000 is in the first state, the loading assembly 2000 is pressed against the upper surface of the first baffle 3100. The second baffle 3200 is used to limit the length of the distal end of the core wire 10 and the distal end of the spring 20 extending out of the guide channel 2101, and its structure will be described later. The second limiting mechanism includes a horizontally arranged third baffle 4100, which is located at the upper right of the rotating shaft 5000, and its opposite ends are respectively connected to the two sub-brackets 1100. By designing the structure of the loading assembly 2000 and selecting appropriate materials, when the loading assembly 2000 is in the second state, the center of gravity of the loading assembly 2000 is located on the side of the rotating shaft 5000 away from the first limiting mechanism 3000 (i.e., the center of gravity is located on the right side of the rotating shaft 5000), so that the loading assembly 2000 can be pressed against the third baffle 4100. In this embodiment, the bottom plate 2110 is partially exposed on the side of the second cover plate 2130 away from the first cover plate 2120, and the exposed area is used to abut against the third baffle 4100.

[0082] The structure of the second baffle 3200 is described below. Fig.10 , a limiting groove 3210 extending in the vertical direction is provided on the second baffle 3200, and when the loading assembly 2000 is in the first state, the limiting groove 3210 is connected to the guide channel 2101. In this embodiment, the limiting groove 3210 has a uniform width throughout its entire depth. The depth mentioned here refers to the dimension of the limiting groove 3210 along the first direction. When the loading assembly 2000 is in the first state, the axial direction of the guide channel 2101 is parallel to the first direction; the width refers to the dimension of the limiting groove 3210 in the second direction. The second direction is perpendicular to the first direction. Specifically, Fig.10 As shown in the example, the first direction is the X direction, and the second direction is the Y direction. Thus, the bottom wall of the limiting groove 3210 (the wall of the limiting groove 3210 perpendicular to the first direction and parallel to the second direction) is used to abut against the core wire 10, and the surface of the second baffle 3200 close to the loading assembly 2000 is used to abut against the spring 20.

[0083] In an alternative embodiment, if Fig.11 As shown, a step surface is provided on the side wall of the limiting groove 3210 (the wall of the limiting groove 3210 parallel to the first direction and perpendicular to the second direction). In this embodiment, the bottom wall of the limiting groove 3210 is used to abut against the core wire 10, and the step surface is used to abut against the spring 20.

[0084] In a further improved solution, the second baffle 3200 is movably disposed on the first baffle 3100, so that the second baffle 3200 can move in a direction close to or away from the loading assembly 2000 under the action of an external force, so as to change the distance between the second baffle 3200 and the lead-out end of the guide channel 2101, thereby enabling the tooling to be used for processing medical guidewires of different specifications. Fig.10 As shown in the example, the depth of the limiting groove 3210 is d1, then when the loading assembly 2000 is in the first state and the second baffle 3200 is close to the loading assembly 2000, the maximum length of the portion of the distal end of the core wire 10 extending outside the guide channel 2101 is d1. In this embodiment, the maximum distance that the second baffle 3200 moves away from the loading assembly 2000 is d2, so the range of the distance between the second baffle 3200 and the loading assembly 2000 is [d1, d1+d2]. Based on this structure, the first limiting mechanism 3000 also includes a locking portion for locking the second baffle 3200 on the first baffle 3100 to prevent the second baffle 3200 from moving on the first baffle 3100.

[0085] Optionally, the material of the second baffle 3200 is preferably copper, which has a relatively large hardness and can effectively limit the position of the distal end of the core wire 10 and the spring 20. In addition, the material of the third baffle 4100 is also copper. The material of the rotating shaft 5000 of the tooling can be stainless steel.

[0086] In addition, if Figure 1 As shown, the tooling also includes a base 6000, and the bracket 1000 is fixedly mounted on the base 6000. The base 6000 is used to be mounted on a working platform of a welding device to facilitate welding operations.

[0087] Next, the method of using the tool will be described with reference to the accompanying drawings.

[0088] Step S1: installing the tooling onto the working platform of the welding equipment via the base 6000.

[0089] Step S2: adjusting the position of the second baffle 3200 on the first baffle 3100 according to the specific specifications of the core wire 10 and the spring 20 .

[0090] Step S3: adjusting the loading assembly 2000 to the first state (ie, the loading assembly 2000 is arranged horizontally).

[0091] Step S4 : the operator applies external force to the operating members 2215 of the two sub-positioning portions 2210 to move the pressing block 2211 away from the bottom plate 2110 .

[0092] Step S5: inserting the core wire 10 and the spring 20 into the guide channel 2101 until the distal end of the core wire 10 abuts against the bottom wall of the limiting groove 3210 , and allowing the spring 20 to pass into the second segment of the guide channel 2101 .

[0093] Step S6: adjusting the sub-positioning portion 2210 disposed in the first positioning area so that the pressing block 2211 moves in a direction close to the bottom plate 2110 until the pressing block 2211 presses the core wire 10 .

[0094] Step S7: The operator applies an external force to the spring 20 between the two positioning areas in the guide channel 2101 to push the spring 20 and make the far end of the spring 20 abut against the second baffle 3200 (with the limiting groove 3210 as the Fig.10 As shown in the example, if the limit groove 3210 is Fig.11 As shown, the distal end of the spring 20 is pushed against the step surface).

[0095] Step S8 : the operator adjusts the sub-positioning portion 2210 disposed in the second positioning area to move the pressing block 2211 in a direction close to the bottom plate 2110 until the pressing block 2211 presses the spring 20 .

[0096] Step S9: Rotate the loading assembly 2000 to switch it to the second state (ie, the loading assembly is arranged vertically).

[0097] Thereafter, the operator may perform the welding operation.

[0098] After welding is completed, the operator adjusts the loading assembly 2000 again to return it to the first state, and then adjusts the two sub-positioning parts 2210 to release the pressure-pressing positioning of the core wire 10 and the spring 20, and then the welded core wire 10 and spring 20 can be taken out.

[0099] Although the present invention is disclosed as above, it is not limited thereto. Those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A tool, characterized in that: include: A bracket and a loading assembly arranged on the bracket; wherein, The loading assembly includes a loading part and a positioning part; a guide channel is provided on the loading part for passing a first workpiece and a second workpiece, and the second workpiece is sleeved on the outside of the first workpiece; the guide channel includes a first segment and a second segment which are sequentially connected and coaxially arranged along the axial direction; the inner diameter of the first segment matches the outer diameter of the first workpiece; the inner diameter of the second segment matches the outer diameter of the second workpiece; the guide channel has a relative introduction end and an outlet end; the guide channel also includes a third segment and a fourth segment, and the third segment, the fourth segment, the first segment and the second segment are sequentially arranged along the direction from the introduction end to the outlet end; the guide channel has an opening in the circumferential direction, and in the axial direction of the guide channel, the opening extends from the starting end of the fourth segment to the middle of the second segment; the positioning part can be movably arranged on the loading part and is located at the opening, so as to keep the first workpiece and the second workpiece in a predetermined position.

2. The tooling according to claim 1, characterized in that: The minimum inner diameter of the third segment is not less than the outer diameter of the second workpiece, the inner diameter of the fourth segment decreases successively from the introduction end to the outlet end, and the maximum inner diameter of the fourth segment is not less than the outer diameter of the second workpiece.

3. The tooling according to claim 1 or 2, characterized in that: The positioning portion includes two sub-positioning portions, wherein one of the sub-positioning portions is used to keep the first workpiece at a predetermined position, and the other sub-positioning portion is used to keep the second workpiece at a predetermined position; or, The two sub-positioning parts are arranged at intervals.

4. The tooling according to claim 3, characterized in that: The loading portion is provided with a plurality of positioning holes; The sub-positioning part includes a pressure block, a guide column, a limit piece and an elastic member; wherein the pressure block is arranged on the loading part and covers the positioning hole; the guide column has a first end and a second end axially opposite to each other, the first end is arranged on the pressure block, the second end passes through the positioning hole and extends to the outside of the loading part, and the guide column can move axially along the positioning hole; the limit piece is arranged on the second end of the guide column; the elastic member is arranged between the loading part and the limit piece, and is in a compressed state to press the pressure block against the first workpiece or the second workpiece.

5. The tooling according to claim 1, characterized in that: The loading portion comprises a bottom plate, a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are arranged on the bottom plate at intervals along the direction from the introduction end to the outlet end of the guide channel; the bottom plate has a first groove, the first cover plate has a second groove, and the second cover plate has a third groove; the second groove is spliced ​​with a part of the first groove to form the third section of the guide channel, and the third groove is spliced ​​with a part of the first groove to form a part of the second section of the guide channel; or, The base plate includes a first sub-base plate and a second sub-base plate spliced ​​to each other; the first cover plate is arranged on the first sub-base plate, and the second cover plate is arranged on the second sub-base plate; the hardness of the material of the first sub-base plate is greater than the hardness of the material of the second sub-base plate and the second cover plate.

6. The tooling according to claim 1, characterized in that: The tooling also includes a first limiting mechanism, which is disposed on the bracket; the first limiting mechanism is used to limit the length of the first workpiece and the second workpiece extending out of the guide channel from the lead-out end of the guide channel.

7. The tooling according to claim 6, characterized in that: The loading assembly has a first state and a second state; the loading assembly is rotatably disposed on the bracket and can rotate relative to the bracket under the action of an external force to switch between the first state and the second state; The first limiting mechanism is also used to keep the loading assembly in the first state; The tool also includes a second limiting mechanism, which is arranged on the bracket and is used to keep the loading assembly in the second state.

8. The tooling according to claim 7, characterized in that: The first limiting mechanism includes a first baffle and a second baffle; the first baffle is connected to the bracket, and the second baffle is arranged on the first baffle; a limiting groove is arranged on the surface of the second baffle close to the loading assembly; When the loading assembly is in the first state, the loading assembly is pressed against the first baffle plate, and the outlet end of the guide channel is connected to the limiting groove; the bottom wall of the limiting groove is used to abut against the first workpiece, and the surface of the second baffle plate close to the loading assembly is used to abut against the second workpiece; or, A step surface facing the loading assembly is provided on the side wall of the limiting groove, and the step surface is used to abut against the second workpiece; or, The second baffle is movably disposed on the first baffle, and can move under the action of an external force to approach or move away from the loading assembly.

9. The tooling according to claim 1, characterized in that: The loading portion includes a plurality of the guide channels arranged in parallel.

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