Iron core welding tooling
By designing horizontal and vertical air channels in the welding fixture for the motor core, the protective gas is ensured to be parallel to the weld bead, thus solving the problem of airflow instability and improving the stability of the weld bead and the welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU FINE STAMPING MASCH TECH CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-06-05
AI Technical Summary
In existing motor core welding, the protective gas is blown radially along the core, resulting in poor airflow stability, unstable weld beads, and easy formation of pores, cracks, and uneven weld beads, which affects the performance of the stator core.
A welding fixture for iron cores was designed, including a base plate, a mandrel, a top plate, an air blowing plate, and an air channel. The protective gas is designed through horizontal and vertical channels to ensure that the airflow is parallel to the weld bead, thereby ensuring airflow stability and preventing weld bead oxidation.
It improves the stability of the weld bead, reduces the defect rate of welding production, and enhances the quality and efficiency of iron core welding.
Smart Images
Figure CN224322576U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor manufacturing, and in particular to iron core welding fixtures. Background Technology
[0002] Motor cores are generally formed by stacking and welding laminations. During core welding, multiple laminations are fitted onto a welding fixture and positioned. The stacked laminations form a straight weld bead in the vertical direction, located on the outer periphery of the core. The welding gun moves along the weld bead in the height direction to perform welding.
[0003] During iron core welding, in order to protect the weld bead from oxidation, a protective gas needs to be blown into the weld bead. When the existing welding fixture blows the protective gas, the blowing direction of the protective gas is along the radial direction of the iron core. The airflow stability is poor, which leads to an unstable weld pool and causes problems such as porosity, cracks or uneven weld bead, thus affecting the various properties of the stator iron core. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a core welding fixture with good protective gas flow stability and stable weld pool.
[0005] One of the objectives of this utility model is achieved through the following technical solution:
[0006] A core welding fixture includes a base plate, a mandrel, and a top plate. The mandrel is fixed to the base plate, and the top plate is installed on top of the mandrel. The core welding fixture also includes an air blowing plate, which is fixed to the base plate. The air blowing plate has air channels, including a first channel and a second channel communicating with the first channel. The first channel is horizontally arranged and radially distributed along the mandrel, while the second channel is vertically arranged and parallel to the axis of the mandrel. The first channel has an air inlet, and the second channel has an air outlet. The air inlet is located on the side wall of the air blowing plate, and the air outlet is located on the upper surface of the air blowing plate. The position of the air outlet corresponds to the position of the weld bead formed by multiple stacked laminations.
[0007] Furthermore, the iron core welding fixture also includes an arc-starting plate, which is fixed to the base plate. The arc-starting plate is provided with a suspended groove, and the air outlet is located in the suspended groove.
[0008] Furthermore, there are multiple air passages, which are evenly spaced on the air blowing plate, and the number and position of the suspended grooves correspond to the air passages.
[0009] Furthermore, the arc-inducing plate includes a copper block located on one side of the suspended groove.
[0010] Furthermore, the iron core welding fixture also includes a positioning plate, which is fixed to the arc-starting plate. The positioning plate is arranged in a vertical direction and is located in the positioning groove of multiple stacked pieces to position the multiple stacked pieces circumferentially.
[0011] Furthermore, the arc-starting plate is annular, the width of the positioning plate is smaller than the width of the arc-starting plate, and the positioning plate is fixed to the side of the arc-starting plate near the inner diameter.
[0012] Furthermore, the iron core welding fixture also includes an air pipe, which is arranged radially along the mandrel, and the base plate rotates relative to the air pipe so that the air pipe and a first channel are on the same straight line.
[0013] Furthermore, a gap is formed between the air tube and the outer periphery of the air blowing plate.
[0014] Furthermore, the iron core welding fixture also includes a partition, which is fixed to the middle of the mandrel. The partition is horizontally arranged to divide the mandrel into at least two installation areas in the vertical direction. The partition is provided with multiple clearance grooves, and the positions of the clearance grooves correspond to the positions of the air outlets.
[0015] Furthermore, the iron core welding fixture also includes a guide post and an elastic element. The guide post is fixed to the base plate and is arranged in a vertical direction. The top plate is installed on the top of the guide post. The elastic element is sleeved on the guide post and its two ends respectively abut against the guide post and the top plate, so that the top plate is floatingly installed on the top of the guide post.
[0016] Compared to existing technologies, the iron core welding fixture of this utility model also includes an air blowing plate, which is fixed to the base plate. The air blowing plate is provided with air channels, including a first channel and a second channel connected to the first channel. The first channel is horizontally arranged and radially distributed along the mandrel, while the second channel is vertically arranged and parallel to the mandrel axis. The first channel is provided with an air inlet, and the second channel is provided with an air outlet. The air inlet is located on the side wall of the air blowing plate, and the air outlet is located on the upper surface of the air blowing plate. The position of the air outlet corresponds to the position of the weld bead formed by multiple stacked plates. Through the above design, the protective gas sprayed from the air outlet is parallel to the weld bead, and the airflow is stable, thereby better protecting the weld bead from oxidation and reducing the defect rate of welding production. Attached Figure Description
[0017] Figure 1 This is a perspective view of the iron core welding fixture of this utility model;
[0018] Figure 2 for Figure 1 Enlarged view of point A of the iron core welding fixture;
[0019] Figure 3 for Figure 1A cross-sectional view of the iron core welding fixture;
[0020] Figure 4 for Figure 3 Enlarged view of part B of the iron core welding fixture.
[0021] In the diagram: 10, base plate; 20, guide post; 30, top plate; 40, mandrel; 50, arc-starting plate; 51, suspended groove; 60, air blowing plate; 61, air passage; 62, first channel; 620, air inlet; 63, second channel; 630, air outlet; 70, partition; 71, clearance groove; 80, positioning plate; 90, air pipe. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0025] Please see Figures 1 to 4 This utility model describes a welding fixture for iron cores, which is used to weld iron cores formed by stacking laminations. Specifically, the iron core is a stator or a rotor.
[0026] The iron core welding fixture includes a base plate 10, a guide post 20, a top plate 30, a mandrel 40, an arc-starting plate 50, an arc-starting plate 60, a partition 70, and a positioning plate 80.
[0027] The base plate 10 is mounted on a turntable, allowing the iron core on the base plate 10 to rotate after one weld pass is completed, enabling the welding of the next weld pass. Specifically, the base plate 10 is circular, with a mounting hole in its center for mounting the mandrel 40. The base plate 10 is fixed to the turntable, which drives the base plate 10 to rotate.
[0028] Guide posts 20 are fixed to the base plate 10 and are arranged vertically to support the top plate 30. Specifically, there are multiple guide posts 20, evenly spaced along the outer periphery of the base plate 10. Each guide post 20 is equipped with a spring, which is sleeved on the guide post 20 and its two ends abut against the guide post 20 and the top plate 30 respectively, allowing the top plate 30 to float on top of the guide posts 20. When the iron core is welded, the top plate 30 applies downward pressure to the stacked iron cores, pressing the laminations together and improving the welding quality.
[0029] The mandrel 40 is fixed to the base plate 10. The mandrel 40 is cylindrical, and its axis coincides with the axis of the base plate 10. When the laminations are stacked, the laminations are fitted onto the mandrel 40 for radial positioning.
[0030] An arc-starting plate 50 is fixed to the base plate 10. The arc-starting plate 50 is annular and located at the bottom of the mandrel 40. The arc-starting plate 50 is used to support the laminated plates. A suspended groove 51 is provided on the arc-starting plate 50. The suspended groove 51 is an open structure located at the outer diameter of the arc-starting plate 50. The position of the suspended groove 51 corresponds to the position of the iron core weld bead. An exhaust port 630 is located on the other side of the suspended groove 51, allowing the protective gas ejected from the exhaust port 630 to flow through the suspended groove 51 to one side of the weld bead and parallel to the weld bead. Specifically, a copper block is also provided on one side of the suspended groove 51 along the radial direction of the iron core. The copper block prevents the laminated plates at the end of the weld bead from sticking to the arc-starting plate 50 due to welding. Specifically, there are multiple suspended grooves 51 and copper blocks, and the positions of these multiple suspended grooves 51 and copper blocks correspond to the positions of the iron core weld bead.
[0031] The air blowing plate 60 is fixed to the arc-starting plate 50 and located above the base plate 10. The air blowing plate 60 is annular, and the arc-starting plate 50 is located around it. The air blowing plate 60 is provided with an air channel 61, through which the air blowing plate 60 blows protective gas to the weld bead of the iron core, and the protective gas is parallel to the weld bead. Specifically, the air channel 61 includes a first channel 62 and a second channel 63, and the second channel 63 is connected to the first channel 62. Specifically, the first channel 62 is horizontally arranged and extends radially along the air blowing plate 60, and the first channel 62 forms an air inlet 620 on the side wall of the air blowing plate 60. The second channel 63 is vertically arranged and parallel to the axis of the mandrel 40. The bottom of the second channel 63 is connected to the first channel 62, and the top of the second channel 63 forms an air outlet 630 on the upper surface of the air blowing plate 60.
[0032] The partition 70 is fixed to the mandrel 40 and divides the mandrel 40 vertically into multiple installation areas, allowing multiple iron cores to be installed on the mandrel 40 vertically. Multiple iron cores are welded together in one operation, improving welding efficiency. In this embodiment, the partition 70 is fixed to the middle of the mandrel 40. The partition 70 is provided with a relief groove 71, the position of which corresponds to the weld bead position of the iron core. One side of the relief groove 71 is a copper block to prevent the iron core from sticking to the partition 70 during welding.
[0033] The positioning plate 80 is fixed to the arc-starting plate 50, and extends vertically parallel to the axis of the mandrel 40. The positioning plate 80 extends into the positioning groove of the stacked pieces to position the stacked pieces circumferentially. The width of the positioning plate 80 is smaller than the width of the arc-starting plate 50.
[0034] The air pipe 90 is located on the side of the air pipe 60 and is radially arranged along the air blowing plate 60. When the air blowing plate 60 rotates, the air pipe 90 can be aligned with different first channels 620. At this time, the air pipe 90 and the first channel 620 are on the same straight line, and there is a gap between the air pipe 90 and the first channel 620 to prevent interference between the tooling rotation and the air pipe 90. Specifically, the gap size is 5-10cm, and the air pipe 90 is a copper pipe.
[0035] When using the iron core welding fixture, the stacked plates are fitted onto the mandrel 40 and positioned by the positioning plate 80. At this time, the weld bead formed by the stacked plates is located on one side of the suspended groove 51. The top plate 30 moves down to press the stacked plates together. Shielding gas is blown out from the gas pipe 90, enters the blowing plate 60 from the gas inlet 620, flows along the first channel 62 to the second channel 63, and then flows out from the gas outlet 630, passing through the suspended groove 51 and continuing upwards, parallel to the weld bead, thus better protecting the weld bead. The welding gun welds the weld bead. After welding, the gas pipe 90 remains stationary, and the fixture begins to rotate to the second weld bead. The shielding gas from the gas pipe 90 flows through the gas pipe 61 to the side of the second weld bead and is parallel to the second weld bead, and welding of the second weld bead begins. Through the above design, the shielding gas ejected from the gas outlet 630 is parallel to the weld bead, and the airflow is stable, thus better protecting the weld bead from oxidation and reducing the defect rate of welding production.
[0036] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.
Claims
1. A welding fixture for iron cores, comprising a base plate, a mandrel, and a top plate, wherein the mandrel is fixed to the base plate, and the top plate is mounted on top of the mandrel, characterized in that: The iron core welding fixture also includes an air blowing plate, which is fixed to the base plate. The air blowing plate has an air channel, which includes a first channel and a second channel communicating with the first channel. The first channel is horizontally arranged and radially distributed along the mandrel, and the second channel is vertically arranged and parallel to the axis of the mandrel. The first channel has an air inlet, and the second channel has an air outlet. The air inlet is located on the side wall of the air blowing plate, and the air outlet is located on the upper surface of the air blowing plate. The position of the air outlet corresponds to the position of the weld bead formed by multiple stacked laminations.
2. The iron core welding fixture according to claim 1, characterized in that: The iron core welding fixture also includes an arc-starting plate, which is fixed to the base plate. The arc-starting plate is provided with a suspended groove, and the air outlet is located in the suspended groove.
3. The iron core welding fixture according to claim 2, characterized in that: The number of air passages is multiple, and the multiple air passages are evenly spaced on the air blowing plate. The number and position of the suspended grooves correspond to the air passages.
4. The iron core welding fixture according to claim 2, characterized in that: The arc-starting plate includes a copper block, which is located on one side of the suspended groove.
5. The iron core welding fixture according to claim 2, characterized in that: The iron core welding fixture also includes a positioning plate, which is fixed to the arc-starting plate. The positioning plate is arranged in a vertical direction and is located in the positioning groove of multiple stacked pieces to position the multiple stacked pieces circumferentially.
6. The iron core welding fixture according to claim 5, characterized in that: The arc-starting plate is annular, and the width of the positioning plate is smaller than the width of the arc-starting plate. The positioning plate is fixed to the side of the arc-starting plate near the inner diameter.
7. The iron core welding fixture according to claim 1, characterized in that: The iron core welding fixture also includes an air pipe, which is arranged radially along the mandrel. The base plate rotates relative to the air pipe so that the air pipe and a first channel are on the same straight line.
8. The iron core welding fixture according to claim 7, characterized in that: The air tube forms a gap with the outer periphery of the air blowing plate.
9. The iron core welding fixture according to claim 1, characterized in that: The iron core welding fixture also includes a partition, which is fixed to the middle of the mandrel. The partition is horizontally arranged to divide the mandrel into at least two installation areas in the vertical direction. The partition is provided with a plurality of clearance grooves, the positions of which correspond to the positions of the air outlets.
10. The iron core welding fixture according to claim 1, characterized in that: The iron core welding fixture also includes a guide post and an elastic element. The guide post is fixed to the base plate and is arranged in a vertical direction. The top plate is installed on the top of the guide post. The elastic element is sleeved on the guide post and its two ends respectively abut against the guide post and the top plate, so that the top plate is floatingly installed on the top of the guide post.