CN117625889A - Quenching induction coil for hub bearing and manufacturing method - Google Patents
Quenching induction coil for hub bearing and manufacturing method Download PDFInfo
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- CN117625889A CN117625889A CN202311780463.XA CN202311780463A CN117625889A CN 117625889 A CN117625889 A CN 117625889A CN 202311780463 A CN202311780463 A CN 202311780463A CN 117625889 A CN117625889 A CN 117625889A
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- 230000006698 induction Effects 0.000 title claims abstract description 177
- 238000010791 quenching Methods 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 230000000171 quenching effect Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000009825 accumulation Methods 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 23
- 238000010894 electron beam technology Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 18
- 229910001220 stainless steel Inorganic materials 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 239000000654 additive Substances 0.000 description 7
- 230000000996 additive effect Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
Embodiments of the present disclosure relate to a quench induction coil for a hub bearing and a method of manufacture. Comprising the following steps: the upper induction coil, the middle induction coil and the lower induction coil are all arc-shaped, and are arranged into a coaxial stepped structure through connecting pieces to form a circular induction coil; the induction coil is internally provided with a first flow pipeline, the cross section of the first flow pipeline is shaped like a square hole, the induction coil is provided with an induction surface and a bottom surface, the induction surface is provided with an arc, and the wall thickness of the joint of the induction surface and the bottom surface is larger than that of the induction surface and the bottom surface. According to the embodiment of the disclosure, the joint of the induction surface and the bottom surface is provided with the heat accumulation area with the non-uniform wall thickness, so that the service life of the induction coil is prolonged, the cross section of the first flow pipeline is set to be a special-shaped square hole, the heating time is shortened, the quenching efficiency is improved, and the energy consumption is reduced.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to a quenching induction coil for a hub bearing and a manufacturing method.
Background
In the field of automotive manufacturing, the main function of hub bearings (hub bearings) is to bear the weight and provide accurate guidance for the rotation of the hub, which is a very important component, both axial and radial loads. In order to improve the hardness, wear resistance and fatigue strength of the surface of the shaft parts, and simultaneously maintain the core part to have higher toughness, the surface quenching is usually carried out on key parts of the shaft parts in the heat treatment stage. At present, a high-frequency induction heating coil for quenching hub bearing shafts is manufactured by adopting a copper pipe and winding according to workpiece patterns, the manufacturing process has larger randomness, no unified standard, rough manufacturing and inaccurate dimension of external parameters. The copper coil preparation process of the inner runner basically adopts the traditional process, a copper plate is machined, an intermediate runner is milled, and then splice welding is carried out to form a certain shape. The shape design of the existing hub bearing quenching coil is limited by machining, the rapid cooling and rapid heating quenching treatment efficiency is low, the energy conservation is poor, the number of splice welding positions is large, the manual operation is dependent, the service life is short, the traditional manual operation is dependent, the preparation period is long, and the batch production is difficult.
Accordingly, there is a need to improve one or more problems in the related art as described above.
It is noted that this section is intended to provide a background or context for the technical solutions of the invention set forth in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
It is an aim of embodiments of the present invention to provide a quench induction coil for a hub bearing and a method of manufacture that overcome, at least in part, one or more of the problems due to the limitations and disadvantages of the related art.
According to a first aspect of embodiments of the present disclosure, there is provided a quench induction coil for a hub bearing, comprising:
an upper induction coil, a middle induction coil, and a lower induction coil;
the upper induction coil, the middle induction coil and the lower induction coil are all arc-shaped, and are arranged into a coaxial stepped structure through connecting pieces to form a circular induction coil;
the induction coil is internally provided with a first flow pipeline, the cross section of the first flow pipeline is shaped like a square hole, the induction coil is provided with an induction surface and a bottom surface, the induction surface is provided with an arc, and the wall thickness of the joint of the induction surface and the bottom surface is larger than that of the induction surface and the bottom surface.
In an embodiment of the disclosure, a second flow pipeline is arranged in the connecting piece, the second flow pipeline is communicated with the first flow pipeline, the connecting piece comprises a first connecting piece, a second connecting piece and a third connecting piece, the first connecting piece and the second connecting piece are arranged at two ends of the upper induction coil, and the third connecting piece is arranged at one end of the middle induction coil.
In an embodiment of the disclosure, the second connector has a height greater than the first connector, and the first connector has a height greater than the third connector.
In an embodiment of the disclosure, the upper induction coil is composed of a first arc section and a second arc section, one end of the first arc section is provided with a first connecting piece, the first connecting piece is connected with one end of the middle induction coil, the other end of the first arc section is provided with a first contact wire, one end of the second arc section is provided with a second connecting piece, the second connecting piece is connected with one end of the lower induction coil, the other end of the second arc section is provided with a second contact wire, and the first contact wire and the second contact wire are arranged in parallel to form a notch of the upper induction coil.
In an embodiment of the disclosure, a third flow pipeline is arranged in the first contact wire and the second contact wire, the first flow pipeline is communicated with the third flow pipeline, the first contact wire is provided with a water inlet, the second contact wire is provided with a water outlet, or the first contact wire is provided with a water outlet, the second contact wire is provided with a water inlet, and cooling liquid flows out from the water outlet after entering through the water inlet.
According to a second aspect of embodiments of the present disclosure, there is provided a method of manufacturing a quenched induction coil for a hub bearing, the method comprising:
establishing a three-dimensional digital model of the quenching induction coil for the hub bearing, and introducing layered scanning data obtained after the model slice of the quenching induction coil for the hub bearing is discretized into electron beam scanning control software;
preheating a stainless steel substrate to 200-350 ℃ under vacuum condition;
uniformly paving spherical copper powder on a stainless steel substrate under a vacuum condition;
under vacuum condition, scanning the powder layer by using defocused electron beam to homogenize the temperature;
scanning the molten powder layer according to the layered scanning data by using a focused electron beam under a vacuum condition;
and repeating the steps of copper powder paving, defocusing scanning and focusing scanning, completing layer-by-layer solidification and accumulation until the quenching induction coil of the hub bearing is printed, naturally cooling to below 50 ℃ under a vacuum condition, and cleaning to obtain the quenching induction coil for the hub bearing.
In one embodiment of the present disclosure, the slice thickness is 40-70 μm.
In one embodiment of the disclosure, the preheating of the stainless steel substrate is realized by defocused electron beam scanning, the scanning beam current is 10-25mA, and the scanning speed is 10-20m/s.
In one embodiment of the present disclosure, the copper powder is spherical, the average diameter of the copper powder is 40-150 μm, and the thickness of the powder spread is 40-70 μm.
In an embodiment of the disclosure, when the defocused electron beam is scanned, the scanning beam current is 10-20 mA, the defocusing amount is-0.2 to-0.5V, and the scanning time is 10-25s.
In one embodiment of the present disclosure, the focused electron beam has a beam spot diameter of 80-120 μm, a scanning beam current of 5-20 mA, a scanning speed of 1-3 m/s, and a scanning pitch of 80-150 μm when scanning the molten powder layer.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects:
in the embodiment of the disclosure, through the quenching induction coil for the hub bearing, on one hand, the wall thickness of the joint of the induction surface and the bottom surface is larger than the wall thickness of the induction surface and the bottom surface, and the heat accumulation area adopts the arrangement of non-uniform wall thickness, so that the service life of the induction coil is prolonged; on the other hand, the cross section of the first flow pipeline is provided with a special-shaped square hole, so that the heating time is shortened, the quenching efficiency is improved, and the energy consumption is reduced. On the other hand, the manufacturing period is shortened and the mass production efficiency is improved by integrally forming through an additive technology.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the invention. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
FIG. 1 illustrates a schematic structural diagram of a quench induction coil for a hub bearing in an exemplary embodiment of the present disclosure;
FIG. 2 illustrates a schematic cross-sectional view of a quench induction coil for a hub bearing in an exemplary embodiment of the present disclosure;
fig. 3 shows a flow chart of steps of a method of manufacturing a quenched induction coil for a hub bearing in an exemplary embodiment of the present disclosure.
In the figure: 100. an upper induction coil; 101. a notch; 102. a first contact wire; 103. a second contact wire; 104. a second connector; 105. a first connector; 200. an intermediate induction coil; 201. a third connecting member; 300. a lower induction coil; 400. a first flow conduit.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
A quench induction coil for a hub bearing is first provided in this example embodiment. Referring to fig. 1, the quenching induction coil for a hub bearing may include: upper induction coil 100, gap 101, intermediate induction coil 200, lower induction coil 300, and first flow conduit 400.
The upper induction coil 100, the middle induction coil 200 and the lower induction coil 300 are all circular arc-shaped, and the upper induction coil 100, the middle induction coil 200 and the lower induction coil 300 are arranged to be coaxial stepped structures through connecting pieces to form a circular induction coil;
the induction coil is internally provided with a first flow pipeline 400, the cross section of the first flow pipeline 400 is shaped like a square hole, the induction coil is provided with an induction surface and a bottom surface, the induction surface is provided with an arc, and the wall thickness of the joint of the induction surface and the bottom surface is larger than that of the induction surface and the bottom surface.
It is to be understood that the junction of the sensing surface and the bottom surface forms a rounded corner.
It should be understood that the upper induction coil 100, the middle induction coil 200 and the lower induction coil 300 are all circular arc-shaped, and the induction coils are formed by arranging the upper induction coil 100, the middle induction coil 200 and the lower induction coil 300 into a coaxial stepped structure through connecting pieces. The arc segments of the induction coil may be added here, for example: a first induction coil is arranged between the upper induction coil 100 and the middle induction coil 200, and the first induction coil, the upper induction coil 100, the middle induction coil 200 and the lower induction coil 300 are arranged to be of a coaxial stepped structure through connecting pieces, so as to form a circular induction coil. The arc section added with the induction coil can be selected according to practical situations, and the implementation is not limited.
Through the quenching induction coil for the hub bearing, the wall thickness of the joint of the induction surface and the bottom surface is larger than that of the induction surface and the bottom surface, the heat accumulation area adopts the arrangement of non-uniform wall thickness, the service life of the induction coil is prolonged, the section shape of the first flow pipeline 400 is set to be a special-shaped square hole, the heating time is shortened, the quenching efficiency is improved, and the energy consumption is reduced.
Hereinafter, the respective portions of the quenching induction coil for a hub bearing described above in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 2.
In one embodiment, a second flow conduit is disposed within the connector, the second flow conduit being in communication with the first flow conduit 400, the connector comprising: the first connecting piece 105, the second connecting piece 104 and the third connecting piece 201, wherein the first connecting piece 105 and the second connecting piece 104 are arranged at two ends of the upper induction coil 100, and the third connecting piece 201 is arranged at one end of the middle induction coil 200.
Specifically, the first connection, the second connection piece 104 and the third connection piece 201 are all provided with induction surfaces, the induction surfaces are all provided with radians, the upper induction coil 100 is connected with one end of the middle induction coil 200 through the first connection piece 105, the upper induction coil 100 is connected with one end of the lower induction coil 300 through the second connection piece 104, the middle induction coil 200 is connected with the lower induction coil 300 through the third connection piece 201, and it is understood that the upper induction coil 100 is connected with one end of the middle induction coil 200, and the other end of the middle induction coil 200 is provided with the third connection piece 201.
In one embodiment, the second connector 104 has a height greater than the first connector 105, and the first connector 105 has a height greater than the third connector 201.
Specifically, the upper induction coil 100, the middle induction coil 200 and the lower induction coil 300 are respectively connected to form a coaxial stepped structure through the first connecting piece 105, the second connecting piece 104 and the third connecting piece 201, so as to form a circular induction coil, and the upper induction coil 100, the middle induction coil 200 and the lower induction coil 300 are all parallel to each other. The height of the second connector 104 is the sum of the height of the first connector 105 and the height of the third connector 201.
In one embodiment, the upper induction coil 100 is composed of a first arc section and a second arc section, one end of the first arc section is provided with the first connecting piece 105, the first connecting piece 105 is connected with one end of the middle induction coil 200, the other end of the first arc section is provided with the first contact wire 102, one end of the second arc section is provided with the second connecting piece 104, the second connecting piece 104 is connected with one end of the lower induction coil 300, the other end of the second arc section is provided with the second contact wire 103, and the first contact wire 102 and the second contact wire 103 are arranged in parallel to form the notch 101 of the upper induction coil 100.
Specifically, the notch 101 of the upper induction coil 100 is filled with an insulating medium, so that a short circuit of the current can be prevented, and the current can flow along the winding direction of the coil.
In one embodiment, a third flow pipeline is arranged in the first contact wire 102 and the second contact wire 103, the first flow pipeline 400 is communicated with the third flow pipeline, the first contact wire 102 is provided with a water inlet, the second contact wire 103 is provided with a water outlet, or the first contact wire 102 is provided with a water outlet, the second contact wire 103 is provided with a water inlet, and cooling liquid flows out from the water outlet after entering through the water inlet.
Specifically, the cooling liquid flows out from the water outlet after entering through the water inlet and passing through the first flow pipeline 400, the second flow pipeline and the third flow pipeline, so that the cooling speed of the quenching induction coil for the hub bearing is improved.
A method of manufacturing a quench induction coil for a hub bearing is also provided in this example embodiment. Referring to what is shown in fig. 3, the method may include:
step S101: and establishing a three-dimensional digital model of the quenching induction coil for the hub bearing, and introducing layered scanning data obtained after the model slice of the quenching induction coil for the hub bearing is discretized into electron beam scanning control software.
Step S102: and preheating the stainless steel substrate under the vacuum condition.
Step S103: and uniformly paving copper powder on the preheated stainless steel substrate under the vacuum condition.
Step S104: under vacuum, the powder layer was scanned with an off-focus electron beam to homogenize the temperature.
Step S105: and under the vacuum condition, the focused electron beam scans the molten powder layer according to the layering scanning data.
Step S106: and repeating the steps of copper powder paving, defocusing scanning and focusing scanning, completing layer-by-layer solidification and accumulation until the quenching induction coil for the hub bearing is printed, naturally cooling to below 50 ℃ under a vacuum condition, and cleaning to obtain the quenching induction coil for the hub bearing.
In one embodiment, the quenching induction coil for the hub bearing uses copper powder as a raw material, avoids the problem of laser compactness, uses an electron beam high-energy beam as an energy source, uses a three-dimensional model of a target part as a basis, and adopts the principle of discrete-stacking to melt the raw material powder point by point and stack layer by layer under the control of software and a numerical control system, thereby realizing the rapid manufacturing of metal components. Along with the continuous development of application fields such as new energy and other high-end equipment part processing, thermal processing equipment and the like, the structural complexity and the functional requirements on the high-performance pure copper induction coil are gradually improved, and the production flow of the traditional pure copper induction coil manufacturing method is as follows: machining, splicing and assembling, re-welding, size shaping, and the like. The whole production process is longer, the product welding joints are more, the problems of high production cost, long production period, poor conductivity, high energy consumption, short service life of the product and the like exist, and the pure copper induction coil manufactured by adopting the powder bed melting additive manufacturing technology can integrally and rapidly manufacture induction coil parts with complex structures.
Compared with the traditional manufacturing method, the method has a plurality of innovations and advantages:
1. advanced manufacturing process. The powder bed melting additive manufacturing technology is a digital and intelligent high-end manufacturing method, and can manufacture pure copper thin-wall hollow copper coil parts with more complex geometric structures and higher functional requirements. 2. The production cost is reduced, and the production process is environment-friendly. The traditional manufacturing mode has longer production procedure flow, needs welding connection and high manual operation strength, but adopts the powder bed melting additive manufacturing technology to produce full-automatic production process, can integrally and rapidly form the induction coil with complex configuration, has short production period and high production efficiency, obviously reduces labor cost and production cost, and does not need welding and is environment-friendly in production process. 3. The produced pure copper induction coil has high conductivity and obvious energy-saving effect. The additive manufacturing product is free of welding seams and the like, the conductivity is improved by more than 20%, and the electric energy is saved by more than 10%. 4. The service life of the product is longer. Through industry contrast verification, the induction coil manufactured by additive manufacturing has no welding seams and the like because of integrated forming, and the service life of the induction coil is 2-3 times that of the induction coil formed by traditional splice welding. 5. The degree of freedom of design is high, and processing is accurate. The complex structure is integrally formed, so that the degree of freedom of design is high, the tolerance precision of the product size is high, and the product size is more similar to the theoretical model size of the product design.
In one embodiment, the slice thickness is 40-70 μm.
In one embodiment, the preheating of the stainless steel substrate is realized by defocused electron beam scanning, the scanning beam current is 10-25mA, and the scanning speed is 10-20m/s.
In one embodiment, the copper powder is spherical, the average diameter of the copper powder is 40-150 μm, and the thickness of the spread powder is 40-70 μm.
In one embodiment, when the defocused electron beam is scanned, the scanning beam current is 10-20 mA, the defocusing amount is-0.2 to-0.5V, and the scanning time is 10-25s.
In one embodiment, the focused electron beam has a beam spot diameter of 80-120 μm, a scanning beam current of 5-20 mA, a scanning speed of 1-3 m/s, and a scanning pitch of 80-150 μm when scanning the molten powder layer.
Example 1:
according to the technical scheme, the quenching induction coil for the hub bearing is designed, the radius of the circular arc inner diameter of the upper induction coil is designed to be 55mm, the height of a first connecting piece is 12mm, the height of a second connecting piece is 8mm, the radius of the circular arc inner diameter of the middle induction coil is designed to be 82mm, the height of a third connecting piece is 5mm, the radius of the circular arc inner diameter of the lower induction coil is designed to be 94mm, the rounded corner R2.0mm at the joint of the induction surface and the bottom surface, the design value of the wall thickness of the induction surface is 1.2mm, the design value of the wall thickness of the bottom surface is 1.2mm, the low-line energy density process is adapted, the forming process is guaranteed not to warp, and meanwhile, the air tightness under the pressure of 0.75MPa is good, and water leakage is avoided.
(1) Establishing a three-dimensional digital model of the formed piece;
(2) The layering scanning data obtained after the three-dimensional digital model slice is discretized is imported into electron beam scanning control software, and the slice thickness is 50 mu m;
(3) Under vacuum condition, the vacuum degree is required to be 2.0X10 -3 pa, preheating a stainless steel substrate to 300 ℃, wherein the preheating is realized by defocusing electron beam scanning, the scanning beam current is 10mA, the scanning speed is 15m/s, and the defocusing amount is 0.2V;
(4) Under vacuum condition, the vacuum degree is required to be 2.0X10 -3 pa, uniformly paving spherical copper powder on a stainless steel substrate;
(5) Under vacuum conditions, the vacuum degree is required to be 2.0X106 -3 pa, scanning the powder layer by using an defocused electron beam to homogenize the temperature, wherein the scanning beam current is 15mA, the defocusing amount is 0.2V, and the scanning time is 10s;
(6) Under vacuum condition, the vacuum degree is required to be 2.0X10 -3 pa, scanning a molten powder layer by using a focused electron beam according to layered scanning data, and forming a large surface at the bottom of the middle two layers: the scanning beam current is 12mA, the scanning speed is 2m/s, and the scanning interval is 100 mu m. Other height forming parameters: the scanning beam current is 15mA, the scanning speed is 2.5m/s, and the scanning interval is 100 mu m;
(7) Repeating the steps (4) to (6) to finish layer-by-layer solidification and accumulation until the whole part is printed; naturally cooling to below 50 ℃ under the vacuum condition, and cleaning to obtain the quenching induction coil part for the hub bearing.
And (3) performing static test after molding: 1) Air tightness test, wherein air holes are not leaked under the air pressure of 0.75MPa, and the pressure is still 0.75MPa after 20 min; 2) Flow test: the flow rate at the water pressure of 0.3MPa is 27.4L/min.
And (3) carrying out dynamic test by a loading machine: 1) The single quenching time of the crankshaft with the same process is shortened by 34 seconds, the quenching efficiency is improved by 20.3 percent, and the energy consumption is reduced by about 10 percent; 2) The service life of the quenching induction coil for the hub bearing is about 15 more than ten thousand times, and the service life of the product is 2-3 times of that of the traditional (5 more than ten thousand times) splice welding forming induction coil; 3) After the coil is installed, conducting test is carried out, the conductivity is 94.3%, the conductivity is improved by more than 20% compared with the traditional spliced coil, and the electric energy is saved by 10%; 4) After heat treatment, the crankshaft is subjected to annular sampling for quenching depth calibration, and the depth value of an annular ring of quenching layer is 3.5mm plus or minus 0.2mm, and the depth is consistent.
It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the above description are directional or positional relationships as indicated based on the drawings, merely to facilitate description of the embodiments of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the embodiments of the present disclosure.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the presently disclosed embodiments, the terms "mounted," "connected," "secured," and the like are to be construed broadly, as well as being either fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
In the presently disclosed embodiments, unless expressly stated and limited otherwise, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (11)
1. A quench induction coil for a hub bearing, comprising:
an upper induction coil, a middle induction coil, and a lower induction coil;
the upper induction coil, the middle induction coil and the lower induction coil are all arc-shaped, and are arranged into a coaxial stepped structure through connecting pieces to form a circular induction coil;
the induction coil is internally provided with a first flow pipeline, the cross section of the first flow pipeline is shaped like a square hole, the induction coil is provided with an induction surface and a bottom surface, the induction surface is provided with an arc, and the wall thickness of the joint of the induction surface and the bottom surface is larger than that of the induction surface and the bottom surface.
2. The quench induction coil for a hub bearing of claim 1, wherein a second flow conduit is disposed within the connector, the second flow conduit in communication with the first flow conduit, the connector comprising: the first connecting piece, second connecting piece, third connecting piece, first connecting piece with the second connecting piece sets up go up induction coil's both ends, the third connecting piece sets up intermediate induction coil's one end.
3. The quench induction coil for a hub bearing of claim 2, wherein the second connector has a height greater than the first connector and the first connector has a height greater than the third connector.
4. The quenching induction coil for a hub bearing according to claim 2, wherein the upper induction coil is composed of a first circular arc section and a second circular arc section, one end of the first circular arc section is provided with the first connecting piece, the first connecting piece is connected with one end of the middle induction coil, the other end of the first circular arc section is provided with a first contact wire, one end of the second circular arc section is provided with the second connecting piece, the second connecting piece is connected with one end of the lower induction coil, the other end of the second circular arc section is provided with a second contact wire, and the first contact wire and the second contact wire are arranged in parallel to form a notch of the upper induction coil.
5. The quenching induction coil for a hub bearing of claim 4, wherein a third flow conduit is provided within the first and second contact wires, the first flow conduit being in communication with the third flow conduit, the first contact wire being provided with a water inlet, the second contact wire being provided with a water outlet, or the first contact wire being provided with a water outlet, the second contact wire being provided with a water inlet through which cooling fluid enters and exits.
6. A method of manufacturing a quench induction coil for a hub bearing, the method comprising:
establishing a three-dimensional digital model of a quenching induction coil of a hub bearing, and introducing layered scanning data obtained after model slices of the quenching induction coil of the hub bearing are discretized into electron beam scanning control software;
preheating a stainless steel substrate to 200-350 ℃ under vacuum condition;
uniformly paving spherical copper powder on a stainless steel substrate under a vacuum condition;
under vacuum condition, scanning the powder layer by using defocused electron beam to homogenize the temperature;
scanning the molten powder layer according to the layered scanning data by using a focused electron beam under a vacuum condition;
and repeating the steps of copper powder paving, defocusing scanning and focusing scanning, completing layer-by-layer solidification and accumulation until the quenching induction coil of the hub bearing is printed, naturally cooling to below 50 ℃ under a vacuum condition, and cleaning to obtain the quenching induction coil for the hub bearing.
7. The method of manufacturing a quench induction coil for a hub bearing of claim 6, wherein the slice thickness is 40-70 μm.
8. The method of manufacturing a quench induction coil for a hub bearing of claim 6, wherein the preheating of the stainless steel substrate is achieved by out-of-focus electron beam scanning at a scanning beam current of 10-25mA and a scanning speed of 10-20m/s.
9. The method of manufacturing a quench induction coil for a hub bearing of claim 6, wherein the copper powder is spherical, the copper powder has an average diameter of 40-150 μm, and the thickness of the powder is 40-70 μm.
10. The method of manufacturing a quenching induction coil for a hub bearing according to claim 6, wherein the scanning beam current is 10-20 mA, the defocus amount is-0.2 to-0.5V, and the scanning time is 10-25s during the defocus electron beam scanning.
11. The method of manufacturing a quenching induction coil for a hub bearing according to claim 6, wherein the beam spot diameter of the focused electron beam is 80 to 120 μm, the scanning beam current is 5 to 20mA, the scanning speed is 1 to 3m/s, and the scanning pitch is 80 to 150 μm when scanning the molten powder layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311780463.XA CN117625889A (en) | 2023-12-22 | 2023-12-22 | Quenching induction coil for hub bearing and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311780463.XA CN117625889A (en) | 2023-12-22 | 2023-12-22 | Quenching induction coil for hub bearing and manufacturing method |
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| Publication Number | Publication Date |
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| CN117625889A true CN117625889A (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311780463.XA Pending CN117625889A (en) | 2023-12-22 | 2023-12-22 | Quenching induction coil for hub bearing and manufacturing method |
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| Country | Link |
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| CN (1) | CN117625889A (en) |
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