CN220963812U - Conductive strip, assembly and motor welded together by laser - Google Patents
Conductive strip, assembly and motor welded together by laser Download PDFInfo
- Publication number
- CN220963812U CN220963812U CN202322664013.6U CN202322664013U CN220963812U CN 220963812 U CN220963812 U CN 220963812U CN 202322664013 U CN202322664013 U CN 202322664013U CN 220963812 U CN220963812 U CN 220963812U
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- conductor
- hole
- assembly
- laser
- wire
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- 239000004020 conductor Substances 0.000 claims abstract description 77
- 238000003466 welding Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 11
- 230000000007 visual effect Effects 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000005476 soldering Methods 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims 1
- 229910000679 solder Inorganic materials 0.000 abstract description 3
- 230000004438 eyesight Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Manufacture Of Motors, Generators (AREA)
Abstract
The application discloses an assembly, a motor and a conductive bar welded together by laser. The assembly includes a first conductor, the first conductor being a wire; and a second conductor having a first surface providing a visual acquisition region and a second surface opposite to the first surface, and a hole penetrating between the first surface and the second surface to pass through the first conductor, the first surface having a step surrounding the hole, the first conductor being provided with a portion thereof exposed to the step as a solder material connecting the first conductor and the second conductor after being heated by a laser. The assembly according to the application has good welding quality.
Description
Technical Field
The application relates to a conductor, in particular to a conductive bar welded with a wire by laser.
The application also relates to the field of laser welding, which relates to a welded structure in which two conductors are connected together, in particular to an assembly welded together via a laser.
The application further relates to the field of motor manufacturing, in particular to a motor comprising the assembly.
Background
In the motor manufacturing process, a connection step is required to transfer the lead wires of the stator winding to the terminal plate. The patch board can be provided with a conductive bar, and the outgoing line is connected with the conductive bar; or the connector is inserted on the wiring board, the connector is internally provided with a terminal, and the terminal is connected with the outgoing line. The connection mode comprises crimping, welding or the like.
The lead-out wires of the stator winding have a circular or flat cross-section. The connection form varies depending on the sectional shape. The conducting wire with the circular section passes through the conducting bar and then is connected with the conducting bar. The flat section wire corresponds to one conductor bar which interfaces with another conductor bar.
In the field of motor manufacturing, laser welding is typically used for the outgoing lines of the stator windings. Laser welding is a method of welding a weld by irradiating the weld with a focused laser beam to generate heat. The laser welding is suitable for welding miniature parts and parts with poor accessibility.
Disclosure of utility model
One aspect of the present application is directed to an assembly for welding together via a laser, comprising: the first conductor is a wire; and a second conductor having a first surface providing a visual acquisition region and a second surface opposite to the first surface, and a hole penetrating between the first surface and the second surface to pass through the first conductor, the first surface having a step surrounding the hole, the first conductor being provided with a portion thereof exposed to the step as a solder material connecting the first conductor and the second conductor after being heated by a laser.
In one embodiment of the assembly, the step is a boss of the first surface that bulges in a direction away from the second surface.
In one embodiment of the assembly, the bump is formed via a process of stamping the second conductor.
In one embodiment of the assembly, the hole is a circular hole and the step is a circular step, the step being centered with the hole.
In one embodiment of the assembly, the bore has a pilot section, the pilot section tapering in diameter towards the first surface.
In one embodiment of the assembly, the hole further has a receiving section for the welding material, the receiving section being located between the first surface and the guiding section.
In one embodiment of the assembly, the first conductor is a copper wire and the second conductor is a copper bar.
The assembly according to the application has good welding quality. By providing a visual acquisition area on the second conductor instead of the first conductor, the visual acquisition device can accurately find the weld location, facilitating subsequent welding. The first conductor is a wire, the end face of the wire is a cutting surface, the wire has the characteristic of being uneven, and the acquisition of the defect surface is a difficult task for equipment vision. The present application provides an easily visually identifiable feature on the surface of the second conductor, i.e. a step around the hole is provided in the visual acquisition area, facilitating the determination of the location of the weld.
The step may be formed by a stamping process. The volume of the second conductor is maintained before and after stamping because the stamping process has the feature of non-removing material.
The hole is shaped to have a guiding section, which is advantageous for controlling the gap between the wire and the hole after passing through the second conductor within the tolerance allowed by the laser device, and avoiding light leakage after laser irradiation. The combination of the guiding section and the receiving section not only provides guiding function, but also provides accommodation of welding materials, increases welding area and improves welding quality.
Another aspect of the present application is to provide an electric machine comprising a stator and a terminal block, wherein the stator winding is connected to the terminal block by an assembly according to any one of the preceding embodiments, the first conductor is an outgoing line of the stator winding, and the second conductor is connected to the terminal block.
The motor has good electrical connection performance due to the good soldering quality of the assembly.
A further aspect of the application relates to providing a conductive strip for laser welding with a wire, the conductive strip having a first surface providing a visual acquisition area and a second surface opposite the first surface, and a hole extending between the first surface and the second surface for passing through the wire, the first surface having a step around the hole.
In an embodiment of the conductor bar, the hole has a guiding section with a diameter gradually decreasing towards the first surface and a receiving section for welding material, the receiving section being located between the first surface and the guiding section.
By providing a visual acquisition area on one surface, the conductor bars of the present application can be adequately soldered to the conductor wires due to the visually identifiable features in the visual acquisition area.
Other aspects and features of the present application will become apparent from the following detailed description, which refers to the accompanying drawings. It is to be understood that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the application, for which reference should be made to the appended claims. It should be further understood that the drawings are merely intended to conceptually illustrate the structures and procedures described herein and that, unless otherwise indicated, the drawings are not necessarily drawn to scale.
Drawings
The present application will be more fully understood from the following detailed description of the specific embodiments, taken in conjunction with the accompanying drawings, in which like reference numerals refer to like elements throughout the views. Wherein:
FIG. 1 is a schematic view of one embodiment of a conductive strip according to the present application;
FIG. 2 is a cross-sectional view of the conductor bar of FIG. 1;
FIG. 3 is a schematic illustration of the state of the conductor bars and wires of the present application prior to soldering; and
Fig. 4 is a schematic view showing a state of the conductive bars and wires according to the present application after soldering.
Detailed Description
In order to assist those skilled in the art in precisely understanding the subject matter claimed herein, a detailed description of the application is provided below in connection with the accompanying drawings.
Fig. 1-2 show schematic diagrams of an embodiment of a conductor bar according to the application, fig. 1 being a perspective view and fig. 2 being a cross-sectional view. The conductor rail 10 has a first surface 12 and a second surface 14 opposite the first surface 12. In the illustrated embodiment, the first surface 12 is an upper surface and the second surface 14 is a lower surface. It is understood that the conductive bars may be arranged in other directions. Neither the first surface 12 nor the second surface 14 is planar. The first surface 14 provides a vision acquisition area for a vision acquisition device such as a CCD camera. A hole 16 is provided therethrough between the first surface 12 and the second surface 14. The first surface 12 also has a step 24 surrounding the aperture 16. When the vision collecting device images, the edge of the step 24 is easily recognized, so that the position of the welding point to be welded can be determined.
In the illustrated embodiment, the step 24 is a ledge 26 of the first surface 12 that bulges in a direction away from the second surface 14. The bosses 26 are formed by stamping the conductor bars, for example by a cold heading process. Corresponding to the boss 26, a counter 28 is provided on the second surface 14, and the bosses 26 and the counter 28 have equal volumes, so that the volume of the conductor rail 10 is maintained before and after the molding of the bosses 26. In other embodiments, the step is a countersink with the first surface recessed in a direction toward the second surface. The sinking platform is formed by stamping the conductive bars.
Returning to fig. 1-2, the step 24 is a circular step. The hole 16 is a circular hole. The step 24 is centered with the hole 16. After the device visually recognizes the step 24, the center of the circle and thus the position of the weld can be determined.
The bore 16 includes a guide section 18 and a receiving section 20. The diameter of the guide section 18 gradually decreases towards the first surface 12 such that this portion of the bore of the guide section 18 is a tapered bore. Between the first surface 12 and the guiding section 18 is a receiving section 20, which is a straight hole. In other embodiments, the bore includes only the guide section, and no receiving section. The holes 16 are obtained by machining the conductor bars after the formation of the bosses 26.
The conductive bar 10 is a copper bar for connection with a wire such as a copper wire. After passing through the holes 16, the wires are connected to the conductor bars 10 by welding, such as laser welding.
Fig. 3 to 4 show the front and rear states in which the wire and the conductive bar are connected to each other by laser welding. Hereinafter, the wire 30 is represented by a first conductor 34 and the conductive bar 10 is represented by a second conductor 36. In fig. 3, a first conductor 34 passes through the aperture 16 of a second conductor 36. Upon passing the guide section 18, the section guides the first conductor 34 into alignment along the center of the bore 16, thereby ensuring that the first conductor 34 coincides with the gap between the bores 16 in 360 ° directions. If the gaps are inconsistent, and the diameter of the laser beam is small, the places with larger gaps are likely to be directly passed by the laser beam, namely light leakage, so that effective welding cannot be ensured. The first conductor 34 passes through the bump 26 to expose a portion thereof. The exposed portion is small and will serve as a welding material for subsequent welding.
The first and second conductors 34, 36 are soldered by a laser device, such as a laser machining machine. First, the first surface 12 of the second conductor 36 is photographed by a vision collecting device. The vision acquisition device may be integrated on the laser device or separate from and communicatively coupled to the laser device. After the image is acquired, the vision acquisition device recognizes the boss 26 and determines the weld location. The laser device then emits a laser beam at the weld and heats the portion of the first conductor 34 at the weld, i.e., the portion of the first conductor 34 that exposes the bump 26. In the molten state, the portion overlies the first surface 12 and flows into the aperture 16. After cooling, the first conductor 34 is connected to the second conductor 36.
In fig. 4, the black block schematically represents the cooled solder material 32, a portion of which overlies the first surface 12, and another portion of which fills between the first conductor 34 and the aperture 16, and in particular between the first conductor 34 and the receiving section 20 of the aperture. The provision of the receiving section 20 increases the welding area, contributing to an improvement in welding quality.
The application also relates to an electric machine comprising an assembly as shown in fig. 4, in which a first conductor 34 and a second conductor 36 are connected by laser welding. In addition to the first conductor and the second conductor, the motor also includes a stator and a terminal block. The stator windings and the terminal blocks are connected by the assembly. The first conductor is an outgoing line of the stator winding. The second conductor is connected to the terminal block, soldered to the terminal block or connected to the terminal block by a connector. In one embodiment, the first conductor is a copper wire having a circular cross-section and the second conductor is a copper bar. The copper wire is connected to the copper bar via laser welding in such a way as to pass through the hole of the copper bar. It is known that the stator has a plurality of groups of stator windings, each stator winding having at least two lead-out wires for current input and output, respectively, so that the terminal block provides a plurality of second conductors in one-to-one connection with the corresponding lead-out wires.
While specific embodiments of the application have been shown and described in detail to illustrate the principles of the application, it will be understood that the application may be embodied otherwise without departing from such principles.
Claims (10)
1. An assembly welded together via a laser, comprising:
A first conductor (34), the first conductor (34) being a wire; and
-A second conductor (36), the second conductor (36) having a first surface (12) providing a visual acquisition area and a second surface (14) opposite to the first surface (12), and-a hole (16) penetrating between the first surface (12) and the second surface (14) to pass through the first conductor (34), the first surface (12) having a step (24) surrounding the hole (16), the first conductor (34) being arranged with a portion thereof exposing the step (24) as a soldering material (32) connecting the first conductor (34) and the second conductor (36) after being heated by a laser.
2. The assembly of claim 1, wherein: the step (24) is a boss (26) of the first surface (12) rising in a direction away from the second surface (14).
3. An assembly according to claim 2, wherein: the bump (26) is formed via a process of stamping the second conductor (36).
4. The assembly of claim 1, wherein: the hole (16) is a round hole, the step (24) is a round step, and the step (24) is centered with the hole (16).
5. The assembly of claim 1, wherein: the bore (16) has a guide section (18), the diameter of the guide section (18) gradually decreasing towards the first surface (12).
6. An assembly according to claim 5, wherein: the hole (16) also has a receiving section (20) for the welding material (32), the receiving section (20) being located between the first surface (12) and the guiding section (18).
7. The assembly of claim 1, wherein: the first conductor (34) is a copper wire, and the second conductor (36) is a copper bar.
8. An electric machine comprising a stator and a terminal block, characterized in that stator windings are connected to the terminal block by means of an assembly according to any of claims 1-7, the first conductor being a lead-out wire of the stator windings, the second conductor being connected to the terminal block.
9. A conductive strip (10) for laser welding with a wire (30), characterized in that the conductive strip (10) has a first surface (12) providing a visual acquisition area and a second surface (14) opposite the first surface (12), and a hole (16) extending between the first surface (12) and the second surface (14) for passing through the wire (30), the first surface (12) having a step (24) surrounding the hole (16).
10. The electrical conductor bar of claim 9, wherein: the bore (16) has a guide section (18) and a receiving section (20) for welding material (32), the diameter of the guide section (18) gradually decreasing towards the first surface (12), the receiving section (20) being located between the first surface (12) and the guide section (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322664013.6U CN220963812U (en) | 2023-09-28 | 2023-09-28 | Conductive strip, assembly and motor welded together by laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322664013.6U CN220963812U (en) | 2023-09-28 | 2023-09-28 | Conductive strip, assembly and motor welded together by laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220963812U true CN220963812U (en) | 2024-05-14 |
Family
ID=91008535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322664013.6U Active CN220963812U (en) | 2023-09-28 | 2023-09-28 | Conductive strip, assembly and motor welded together by laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220963812U (en) |
-
2023
- 2023-09-28 CN CN202322664013.6U patent/CN220963812U/en active Active
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