Welding end

Abstract

The utility model relates to a welding end which comprises a heat conduction sleeve and a welding flux opening. The heat conduction sleeve is located on the periphery of the to-be-welded copper wire and made of heat conduction materials; the solder ports are uniformly distributed on the side wall of the heat conduction sleeve and are used for adding solder; firstly, due to the fact that welding operation is completed in the mode that the welding flux openings are formed in the heat conduction sleeve, welding flux can directionally flow into gaps of copper wires to be welded, welding of the copper wires is facilitated, and missing welding is prevented; and secondly, as the inner wall of the heat conducting sleeve is provided with the convex piece, the copper wire to be welded can be prevented from blocking the welding flux port, so that the welding flux can better fall into the gap of the copper wire to be welded.

Description

Technical Field

[0001] The utility model relates to the field of welding auxiliary equipment, in particular to a welding end head. Background Art

[0002] In motor production, due to different application specifications, the coil winding composed of more than dozens of copper wires needs to be welded. The welding treatment of the copper wire affects the performance of the motor and also affects the life of the motor. Among the existing motor winding welding, resistance welding is widely used due to its high operating efficiency and low cost. The existing resistance welding technology is relatively mature, but there are still certain defects in actual use.

[0003] For example, when welding copper wires with existing resistance welding, the copper wires are too loose, so that the local solder is not completely melted, so that the gaps between the copper wires are not completely filled, resulting in poor welding. And due to the characteristics of the copper wires themselves, the welding time should not be too long to avoid excessively high temperatures of the copper wires, which may burn the normal insulating paint film.

[0004] Therefore, providing a welding joint that can improve the welding effect and efficiency of copper wire resistance welding is a technical problem that needs to be solved urgently in the field. Utility Model Content

[0005] In order to solve at least one of the above technical problems, the utility model provides a welding end.

[0006] The utility model is implemented in this way: a welding end comprises a heat-conducting sleeve and a soldering port; the heat-conducting sleeve is located at the periphery of the copper wire to be welded and is made of heat-conducting material; the soldering port is evenly distributed on the side wall of the heat-conducting sleeve and is used for adding solder.

[0007] Optionally, the cross-section of the heat-conducting sleeve is circular.

[0008] Optionally, an easy-to-bend structure is provided on the inner wall of the heat-conducting sleeve to facilitate deformation of the heat-conducting sleeve.

[0009] Optionally, the easy-bending structure is an arc groove arranged opposite to each other on the inner wall of the heat-conducting sleeve.

[0010] Optionally, the ratio of the diameter of the arc groove to the inner wall diameter of the heat-conducting sleeve and / or the diameter of the inscribed circle is 1:15.

[0011] Optionally, the cross-section of the thermal sleeve is hexagonal.

[0012] Optionally, a protrusion for preventing the solder opening from being blocked is provided on the inner wall of the heat-conducting sleeve and between the solder openings.

[0013] Optionally, the protrusions are several semicircular arc cylinders arranged along the length direction of the heat-conducting sleeve.

[0014] Optionally, the ratio of the semicircular arc cylinder to the inner wall diameter and / or the inscribed circle diameter of the heat conductive sleeve is 1:10.

[0015] Optionally, the ratio of the solder opening diameter to the inner wall diameter and / or the inscribed circle diameter of the thermal sleeve is 1:3.

[0016] The beneficial technical effects of implementing the utility model are as follows: firstly, since the utility model adopts the method of setting a solder opening on the heat-conducting sleeve to complete the welding operation, this method can make the solder flow directionally into the gap of the copper wire to be welded, which is beneficial to the welding of the copper wire and prevents the occurrence of empty welding; secondly, since the utility model has a protrusion on the inner wall of the heat-conducting sleeve, it can prevent the copper wire to be welded from blocking the solder opening, so that the solder can better fall into the gap of the copper wire to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a circular cylinder of the utility model;

[0018] Figure 2 It is a schematic diagram of a hexagonal cylinder of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that if the embodiments of the present utility model involve directional indications, such as up, down, left, right, front, back, etc., then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. In addition, if the embodiments of the present utility model involve descriptions such as "first, second", "S1, S2", "step one, step two", etc., then such descriptions are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features or indicating the execution order of the method, etc. Those skilled in the art can understand that everything that does not violate the key points of the utility model under the technical concept of the utility model should be included in the protection scope of the utility model.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] like Figure 1-2As shown, a welding end includes a heat-conducting sleeve 1 and a solder port 2; the heat-conducting sleeve 1 is located at the periphery of the copper wire to be welded and is made of a heat-conducting material; the solder port 2 is evenly distributed on the side wall of the heat-conducting sleeve 1 and is used to add solder.

[0023] Specifically, when resistance welding is used to weld copper wires, since the copper wires are relatively loose, it is difficult for the solder to reach the gaps between the copper wires, resulting in poor welding; if the welding time is simply increased, the temperature of the copper wire will be too high, burning the normal insulating paint film. For this reason, the utility model provides a preferred embodiment of a welding end.

[0024] For example, take the coil winding of the motor as an example. When the copper wire in the winding needs to be welded, first select a thermal sleeve 1 of appropriate size, sleeve the thermal sleeve 1 on the outer periphery of the copper wire to be welded, and then use pliers, pressure pliers and other pressurizing equipment to pressurize the thermal sleeve 1 so that the thermal sleeve 1 is in close contact with the copper wire to be welded, and then clamp the welding electrode of the resistor to the thermal sleeve 1 to start welding. After the copper wire is heated and turns red, insert the solder from the solder port 2. Under the action of high temperature, the solder melts and penetrates the gap between the copper wires. Due to the presence of the thermal sleeve 1, the dissolved solder is difficult to flow along the axial direction of the copper wire. After the solder cools down, the welding of the copper wire is completed.

[0025] It is worth noting that in this embodiment, only the positional relationship and function of the thermal sleeve 1 and the solder port 2 are restricted, but their size, shape, quantity, etc. are not restricted. In other words, the size, shape, quantity, etc. of the thermal sleeve 1 and the solder port 2 can be arbitrarily set by technical personnel in this field.

[0026] The key point of the utility model is that the heat conduction of the heat-conducting sleeve 1 and the limiting effect on the solder are utilized to quickly heat the copper wire to be welded and at the same time guide the solder so that the solder fully flows into the gap between the copper wires; at the same time, the solder port 2 is utilized to facilitate the user to better add solder to the welding point, thereby further improving the quality and efficiency of welding.

[0027] It is worth noting that the thermal sleeve 1 is made of a thermally conductive material, but its specific material is not limited. That is to say, the thermal sleeve 1 can be made of various thermally conductive materials such as copper and iron, and its specific material can be arbitrarily set by technicians in this field.

[0028] Preferably, the thermal sleeve 1 is made of copper.

[0029] Specifically, copper has strong thermal conductivity, high ductility and low manufacturing cost.

[0030] Preferably, Figure 1 As shown, the cross section of the thermal sleeve 1 is circular.

[0031] Specifically, the heat-conducting sleeve 1 is designed to be a circular structure, which is convenient for users to carry. At the same time, since the heat-conducting sleeve 1 is a circular structure, it can better match the copper wire to be welded.

[0032] Preferably, Figure 1 As shown, an easy-bending structure is provided on the inner wall of the heat-conducting sleeve 1 to facilitate the deformation of the heat-conducting sleeve 1 .

[0033] Specifically, since the thermal sleeve 1 needs to be pressurized during the welding process so as to make the thermal sleeve 1 in close contact with the copper wire to be welded, the thermal sleeve 1 is prevented from moving along the axial direction of the copper wire to be welded during the welding process, which affects the welding quality. However, when the welding environment is relatively small and it is not convenient to use pressurizing equipment such as pliers and pressure pliers, the operator can only pressurize the thermal sleeve 1 by hand. Therefore, an easy-bending structure that facilitates the deformation of the thermal sleeve 1 is provided on the inner wall of the thermal sleeve 1, which is conducive to the user to better pressurize the thermal sleeve 1.

[0034] It is worth noting that this embodiment only limits the position of the easy-bend structure, but does not limit its number, shape and size, that is, the number, shape and size of the easy-bend structure can be arbitrarily set by those skilled in the art.

[0035] More preferably, the easy-bending structure is an arc groove 3 arranged opposite to each other on the inner wall of the heat-conducting sleeve 1 .

[0036] For example, Figure 1 As shown, the easy-bending structure is an arc groove 3 arranged opposite to each other on the inner wall of the heat-conducting sleeve 1. When the user has sleeved the heat-conducting sleeve 1 on the periphery of the copper wire to be welded, two fingers are placed in a direction perpendicular to the connecting line of the arc groove 3, and then force is applied. At this time, due to the thin wall thickness at the arc groove 3, the heat-conducting sleeve 1 will be deformed at the arc groove 3 to achieve close contact with the copper wire to be welded, and then the user can perform subsequent operations.

[0037] More preferably, the ratio of the diameter of the arc groove 3 to the inner wall diameter and / or the inscribed circle diameter of the heat-conducting sleeve 1 is 1:15.

[0038] Specifically, since the wall thickness of the heat-conducting sleeve 1 where the arc groove 3 is set will become thinner, when the diameter of the arc groove 3 is too large, the deformation of the heat-conducting sleeve 1 after pressurization may cause the heat-conducting sleeve 1 to rupture, and then cause the solder to dissolve and flow out from the rupture, affecting the welding effect. For this reason, the utility model provides a preferred embodiment.

[0039] For example, the ratio of the diameter of the arc groove 3 to the inner wall diameter and / or the inscribed circle diameter of the thermal sleeve 1 is 1:15, that is, when the diameter of the thermal sleeve 1 is 15 mm, the diameter of the arc groove 3 is 1 mm. At this ratio, it is easy for the user to pressurize the thermal sleeve 1 to deform it by hand, while ensuring that the deformed thermal sleeve 1 will not break.

[0040] Preferably, Figure 2 As shown, the cross section of the thermal sleeve 1 is hexagonal.

[0041] Specifically, since the thermal sleeve 1 needs to be pressurized during the operation so that it can be deformed and welded to the copper wire to be welded, in actual use, users often lack or are inconvenient to use pressurizing equipment such as pliers and pressure pliers. For this reason, the thermal sleeve 1 is set to a hexagonal structure, which is convenient for the user to pressurize the thermal sleeve 1 to deform it during use.

[0042] More preferably, a protrusion for preventing the solder opening 2 from being blocked is provided on the inner wall of the heat-conducting sleeve 1 and between the solder openings 2 .

[0043] Specifically, since the heat-conducting sleeve 1 is in close contact with the copper wire to be welded after being deformed under pressure, the copper wire to be welded is easily blocked under the solder opening 2, which is not conducive to the flow of the molten solder. For this reason, the utility model provides a protrusion on the inner wall of the heat-conducting sleeve 1 and between the solder openings 2 to prevent the solder openings 2 from being blocked.

[0044] It is worth noting that in this embodiment, only the position and function of the protrusion are limited, but its size, shape, material, etc. are not limited. In other words, the size, shape, material, etc. of the protrusion can be arbitrarily set by those skilled in the art.

[0045] More specifically, Figure 1-2 As shown, the protruding parts are several semi-circular arc cylinders 4 arranged along the length direction of the heat-conducting sleeve 1.

[0046] For example, when the thermal sleeve 1 is deformed under pressure, it will be in close contact with the copper wire to be soldered. At this time, the semi-arc cylinder 4 located between the solder openings 2 will squeeze the copper wire below it, ensuring the space below the solder opening 2 to ensure that the solder can flow into the gap between the copper wires.

[0047] More preferably, the ratio of the inner wall diameter and / or the inscribed circle diameter of the semi-arc cylinder 4 to the thermal sleeve 1 is 1:10.

[0048] Specifically, in order to ensure that the thermal sleeve 1 can accommodate a sufficient number of copper wires, and at the same time prevent the thermal sleeve 1 from being deformed due to the contact between the semi-arc cylinders 4 being too large, resulting in insufficient deformation of the thermal sleeve 1 and affecting subsequent welding operations, the utility model provides a preferred embodiment.

[0049] For example, the ratio of the semi-arc cylinder 4 to the inner wall diameter and / or the inscribed circle diameter of the thermal sleeve 1 is 1:10. Taking the cross-section of the thermal sleeve 1 as an example of a hexagon, that is, when the inscribed circle diameter of the thermal sleeve 1 is 10 mm, the diameter of the semi-arc cylinder 4 is 1 mm. At this time, the semi-arc cylinder 4 can not only open up a larger gap below the solder opening 2, but also will not affect the deformed shape of the thermal sleeve 1.

[0050] Preferably, the ratio of the diameter of the solder opening 2 to the inner wall diameter and / or the inscribed circle diameter of the thermal sleeve 1 is 1:3.

[0051] Specifically, since the setting of the solder port 2 will affect the strength of the thermal sleeve 1 itself, the size of the solder port 2 should not be too large, otherwise it will affect the strength of the thermal sleeve 1 itself; at the same time, the size of the solder port 2 should not be too small, otherwise it will be difficult for the solder to flow smoothly into the coil gap. For this reason, the utility model provides a preferred embodiment.

[0052] For example, the ratio of the diameter of the solder port 2 to the inner wall diameter and / or the inscribed circle diameter of the thermal sleeve 1 is 1:3. Taking the cross-section of the thermal sleeve 1 as an example of a hexagon, that is, when the inscribed circle diameter of the thermal sleeve 1 is 12 mm, the diameter of the solder port 2 is 4 mm. At this time, the solder port 2 will not affect the strength of the thermal sleeve 1 itself, while ensuring the smooth flow of the solder.

[0053] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A welding end, characterized in that: It comprises a heat-conducting sleeve (1) and a soldering port (2); A heat-conducting sleeve (1), located outside the copper wire to be welded, and made of a heat-conducting material; Solder ports (2) are evenly distributed on the side wall of the heat-conducting sleeve (1) and are used for adding solder.

2. The welding end according to claim 1, characterized in that: The cross section of the heat-conducting sleeve (1) is circular.

3. The welding end according to claim 2, characterized in that: An easy-to-bend structure is provided on the inner wall of the heat-conducting sleeve (1) to facilitate deformation of the heat-conducting sleeve (1).

4. The welding terminal according to claim 3, characterized in that: The easy-bending structure is an arc groove (3) arranged opposite to each other on the inner wall of the heat-conducting sleeve (1).

5. The welding terminal according to claim 4, characterized in that: The ratio of the diameter of the circular arc groove (3) to the inner wall diameter and / or the inscribed circle diameter of the heat-conducting sleeve (1) is 1:

15.

6. The welding terminal according to claim 1, characterized in that: The cross section of the heat-conducting sleeve (1) is hexagonal.

7. The welding terminal according to claim 6, characterized in that: A protrusion for preventing the solder opening (2) from being blocked is provided on the inner wall of the heat-conducting sleeve (1) and between the solder openings (2).

8. The welding terminal according to claim 7, characterized in that: The protruding parts are a plurality of semicircular arc cylinders (4) arranged along the length direction of the heat-conducting sleeve (1).

9. The welding terminal according to claim 8, characterized in that: The ratio of the inner wall diameter and / or the inscribed circle diameter of the semicircular arc cylinder (4) to the heat-conducting sleeve (1) is 1:

10.

10. The welding end according to any one of claims 1 to 9, characterized in that: The ratio of the diameter of the solder opening (2) to the inner wall diameter and / or the inscribed circle diameter of the heat-conducting sleeve (1) is 1:3.

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