CN110773567B - Pin riveting process of vehicle-mounted inductor - Google Patents
Pin riveting process of vehicle-mounted inductor Download PDFInfo
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- CN110773567B CN110773567B CN201911001078.4A CN201911001078A CN110773567B CN 110773567 B CN110773567 B CN 110773567B CN 201911001078 A CN201911001078 A CN 201911001078A CN 110773567 B CN110773567 B CN 110773567B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
- H01F27/2852—Construction of conductive connections, of leads
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
Abstract
The invention relates to the technical field of pin processing, in particular to a pin riveting process of a vehicle-mounted inductor, which comprises the following steps: and riveting the coil leading-out ends surrounding the magnetic core with the terminals respectively to form pins, and then carrying out tinning treatment on the pins. The invention adopts the lead wire riveting terminal process, directly installs the terminal for fixation, greatly improves the electrified current, is beneficial to assembly, saves the space and improves the reliability of the product.
Description
Technical Field
The invention relates to the technical field of pin processing, in particular to a pin riveting process of a vehicle-mounted inductor.
Background
Because the traditional vehicle-mounted inductor pins are directly welded with pins to be led out, the welded product has larger volume, and the lead-out wires are long and inconvenient to install, so that the phenomenon that the current cannot meet the through-flow requirement is easily caused; and the welding vibration can also occur when the automobile runs, so that the terminal has the risk of falling off.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a pin riveting process of a vehicle inductor.
The purpose of the invention is realized by the following technical scheme:
a pin riveting process of a vehicle-mounted inductor comprises the following steps: and riveting the coil leading-out ends surrounding the magnetic core with the terminals respectively to form pins, and then carrying out tinning treatment on the pins.
The coil leading-out end is a copper strip, and the copper strip is composed of the following elements in percentage:
the balance of inevitable impurities.
According to the invention, the coil and the coil leading-out end are both made of copper strips, and the copper strips are more convenient to rivet with the terminals, so that the stability of a riveting structure is improved; in addition, the invention also specially develops a high-conductivity and high-strength copper strip which is convenient to use in an inductor.
In the alloy composition of the copper strip, the proportion of Cu reaches more than 99.6 percent, so that the copper strip is ensured to have better conductivity; after Zr and Ce are subjected to solid solution and aging treatment, precipitated dispersion phases and parent phases keep coherent relation, and the addition of Ce can enable the precipitated phases to be finer, so that the strength of the alloy is improved; the addition of the B element can refine grains and increase the area of grain boundaries, thereby improving the strength of the alloy. Although the addition of Zr, B and Ce inevitably reduces the conductivity of Cu, the alloy still has better conductivity performance.
Preferably, the copper strip consists of the following elements in percentage:
the balance of inevitable impurities.
Wherein the inevitable impurity percentage is not higher than 0.03%.
The preparation method of the copper strip comprises the following steps:
(1) preparing materials: weighing Cu, Cu-Zr intermediate alloy, B and Cu-Ce intermediate alloy according to the weight ratio;
(2) smelting: under the protection of nitrogen, heating the ingredients to 1200-1300 ℃ to form alloy liquid;
(3) casting: carrying out semi-continuous casting on the alloy liquid to obtain an alloy ingot;
(4) hot rolling: removing oxide skin on the surface of the alloy ingot, heating to 900-;
(5) solid solution: carrying out solution treatment on the hot-rolled strip blank, and then carrying out water-cooling quenching;
(6) cold rolling: cold rolling and trimming the hot rolled strip blank to obtain a cold rolled strip blank;
(7) aging treatment: and carrying out aging treatment on the cold-rolled strip blank to obtain the copper strip.
Wherein the temperature of the solution treatment in the step (5) is 900-950 ℃, and the heat preservation time is 1.5-2.5 h.
If the solid solution temperature is too low or the time is too short, the undissolved alloy components can form dispersion strengthening, and the scattering effect of Cu-Zr precipitation relative electrons is increased, so that the conductivity of the alloy is reduced; and when the solid solution temperature is too high or the time is too long, the alloy elements which are solid-dissolved in the Cu matrix are increased, the electron scattering effect is also enhanced, and thus the conductivity of the alloy is also reduced.
Wherein, the aging treatment in the step (7) is two-stage aging treatment, the temperature of the first aging treatment is 400 ℃ for 1-2h, the temperature of the second aging treatment is 400 ℃ for 500 ℃ for 2-4 h.
The aging treatment can effectively reduce the energy storage and dislocation of the alloy after deformation and improve the conductivity of the alloy, but the temperature and the time are too long and the effect of gain is not too much.
The invention has the beneficial effects that: 1. the invention adopts the lead wire riveting terminal process, directly installs the terminal for fixation, and greatly improves the electrified current; 2. the riveting terminal is beneficial to assembly, saves space and improves the reliability of products.
Drawings
FIG. 1 is a schematic structural diagram of a vehicle inductor;
1-coil leading-out terminal and 2-terminal.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and the accompanying fig. 1, and the description of the embodiments is not intended to limit the present invention.
Example 1
A pin riveting process of a vehicle-mounted inductor comprises the following steps: the coil terminals 1 surrounding the magnetic core are riveted to the terminals 2, respectively, to form pins, and then the pins are subjected to a tinning process.
The coil leading-out end 1 is a copper strip, and the copper strip is composed of the following elements in percentage:
the balance of inevitable impurities.
The preparation method of the copper strip comprises the following steps:
(1) preparing materials: weighing Cu, Cu-Zr intermediate alloy, B and Cu-Ce intermediate alloy according to the weight ratio;
(2) smelting: under the protection of nitrogen, heating the ingredients to 1200 ℃ to form alloy liquid;
(3) casting: carrying out semi-continuous casting on the alloy liquid to obtain an alloy ingot;
(4) hot rolling: removing oxide skin on the surface of the alloy ingot, heating to 900 ℃, and carrying out hot rolling in hot rolling equipment to obtain a hot rolling strip blank;
(5) solid solution: carrying out solution treatment on the hot-rolled strip blank, and then carrying out water-cooling quenching;
(6) cold rolling: cold rolling and trimming the hot rolled strip blank to obtain a cold rolled strip blank;
(7) aging treatment: and carrying out aging treatment on the cold-rolled strip blank to obtain the copper strip.
Wherein the temperature of the solution treatment in the step (5) is 900 ℃, and the heat preservation time is 2.5 h.
And (3) the ageing treatment in the step (7) is double-stage ageing treatment, the temperature of the first ageing treatment is 300 ℃, the time is 2 hours, the temperature of the second ageing treatment is 400 ℃, and the time is 4 hours.
Example 2
A pin riveting process of a vehicle-mounted inductor comprises the following steps: the coil terminals 1 surrounding the magnetic core are riveted to the terminals 2, respectively, to form pins, and then the pins are subjected to a tinning process.
The coil leading-out end 1 is a copper strip, and the copper strip is composed of the following elements in percentage:
the balance of inevitable impurities.
The preparation method of the copper strip comprises the following steps:
(1) preparing materials: weighing Cu, Cu-Zr intermediate alloy, B and Cu-Ce intermediate alloy according to the weight ratio;
(2) smelting: under the protection of nitrogen, heating the ingredients to 1300 ℃ to form alloy liquid;
(3) casting: carrying out semi-continuous casting on the alloy liquid to obtain an alloy ingot;
(4) hot rolling: removing oxide skin on the surface of the alloy ingot, heating to 1000 ℃, and carrying out hot rolling in hot rolling equipment to obtain a hot rolling strip blank;
(5) solid solution: carrying out solution treatment on the hot-rolled strip blank, and then carrying out water-cooling quenching;
(6) cold rolling: cold rolling and trimming the hot rolled strip blank to obtain a cold rolled strip blank;
(7) aging treatment: and carrying out aging treatment on the cold-rolled strip blank to obtain the copper strip.
Wherein the temperature of the solution treatment in the step (5) is 950 ℃, and the heat preservation time is 1.5 h.
And (3) the aging treatment in the step (7) is double-stage aging treatment, the temperature of the first aging treatment is 400 ℃, the time is 1h, the temperature of the second aging treatment is 500 ℃, and the time is 2 h.
Example 3
A pin riveting process of a vehicle-mounted inductor comprises the following steps: the coil terminals 1 surrounding the magnetic core are riveted to the terminals 2, respectively, to form pins, and then the pins are subjected to a tinning process.
The coil leading-out end 1 is a copper strip, and the copper strip is composed of the following elements in percentage:
the balance of inevitable impurities.
The preparation method of the copper strip comprises the following steps:
(1) preparing materials: weighing Cu, Cu-Zr intermediate alloy, B and Cu-Ce intermediate alloy according to the weight ratio;
(2) smelting: under the protection of nitrogen, heating the ingredients to 1250 ℃ to form alloy liquid;
(3) casting: carrying out semi-continuous casting on the alloy liquid to obtain an alloy ingot;
(4) hot rolling: removing oxide skin on the surface of the alloy ingot, heating to 950 ℃, and carrying out hot rolling in hot rolling equipment to obtain a hot rolling strip blank;
(5) solid solution: carrying out solution treatment on the hot-rolled strip blank, and then carrying out water-cooling quenching;
(6) cold rolling: cold rolling and trimming the hot rolled strip blank to obtain a cold rolled strip blank;
(7) aging treatment: and carrying out aging treatment on the cold-rolled strip blank to obtain the copper strip.
Wherein the temperature of the solution treatment in the step (5) is 930 ℃, and the heat preservation time is 2 h.
And (3) the ageing treatment in the step (7) is double-stage ageing treatment, the temperature of the first ageing treatment is 350 ℃, the time is 1.5h, the temperature of the second ageing treatment is 450 ℃, and the time is 3 h.
Comparative example 1
This comparative example differs from example 3 in that:
the copper strip consists of the following elements in percentage by weight:
Cu 99.65％
Zr 0.3％
Ce 0.03％
the balance of inevitable impurities.
Comparative example 2
This comparative example differs from example 3 in that:
the copper strip consists of the following elements in percentage by weight:
the balance of inevitable impurities.
Comparative example 3
This comparative example differs from example 3 in that:
the copper strip consists of the following elements in percentage by weight:
the balance of inevitable impurities.
Comparative example 4
This comparative example differs from example 3 in that:
the copper strip consists of the following elements in percentage by weight:
Cu 99.65％
B 0.3％
Ce 0.03％
the balance of inevitable impurities.
Comparative example 5
This comparative example differs from example 3 in that:
the temperature of the solution treatment in the step (5) is 900 ℃, and the heat preservation time is 2 h.
Comparative example 6
This comparative example differs from example 3 in that:
the temperature of the solution treatment in the step (5) is 950 ℃, and the heat preservation time is 2 h.
The copper strips of example 3 and comparative examples 1-5 were tested for tensile strength, hardness and electrical conductivity according to standards GB/T228.1, GB/T4340.1 and GB/T351, with the results of the tests given in the following table:
| tensile strength (MPa) | Hardness (HV) | Conductivity (IACS) | |
| Example 3 | 247 | 71 | 96.2 |
| Comparative example 1 | 231 | 61 | 94.2 |
| Comparative example 2 | 239 | 64 | 95.4 |
| Comparative example 3 | 237 | 66 | 95.7 |
| Comparative example 4 | 229 | 61 | 94.6 |
| Comparative example 5 | 251 | 76 | 94.8 |
| Comparative example 6 | 238 | 63 | 93.7 |
As can be seen from the comparison between example 3 and comparative examples 1-4, the use of Zr instead of B or B instead of Zr has a great influence on the mechanical property and the conductivity of the alloy, and the appropriate compounding of Zr and B can improve the mechanical property and the conductivity of the alloy to different degrees, but the ratio of example 3 is the best; as can be seen from the comparison between the example 3 and the comparative examples 5 to 6, when the solid solution temperature is low, the undissolved alloy components can form dispersion strengthening, and the scattering effect of Cu-Zr precipitation relative electrons is increased, so that the conductivity of the alloy is reduced, and the mechanical property of the alloy is improved; when the solid solution temperature is higher, the alloy elements which are solid-dissolved in the Cu matrix are increased, the electron scattering effect is also enhanced, so that the conductivity of the alloy is also reduced, and meanwhile, the solid solution strengthening effect caused by the increase of the crystal grains of the alloy is lower, so that the mechanical property is also reduced.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (5)
1. The utility model provides a pin riveting technology of on-vehicle inductance which characterized in that: the method comprises the following steps: riveting the coil leading-out ends surrounding the magnetic core with terminals respectively to form pins, and then carrying out tinning treatment on the pins;
the coil leading-out end is a copper strip, and the copper strip is composed of the following elements in percentage:
the balance of inevitable impurities;
the preparation method of the copper strip comprises the following steps:
(1) preparing materials: weighing Cu, Cu-Zr intermediate alloy, B and Cu-Ce intermediate alloy according to the weight ratio;
(2) smelting: under the protection of nitrogen, heating the ingredients to 1200-1300 ℃ to form alloy liquid;
(3) casting: carrying out semi-continuous casting on the alloy liquid to obtain an alloy ingot;
(4) hot rolling: removing oxide skin on the surface of the alloy ingot, heating to 900-;
(5) solid solution: carrying out solution treatment on the hot-rolled strip blank, and then carrying out water-cooling quenching;
(6) cold rolling: cold rolling and trimming the hot rolled strip blank to obtain a cold rolled strip blank;
(7) aging treatment: and carrying out aging treatment on the cold-rolled strip blank to obtain the copper strip.
2. The pin riveting process of the vehicle inductor according to claim 1, characterized in that: the copper strip consists of the following elements in percentage by weight:
the balance of inevitable impurities.
3. The pin riveting process of the vehicle inductor according to claim 1, characterized in that: the inevitable impurity percentage is not higher than 0.03%.
4. The pin riveting process of the vehicle inductor according to claim 1, characterized in that: the temperature of the solution treatment in the step (5) is 900-950 ℃, and the heat preservation time is 1.5-2.5 h.
5. The pin riveting process of the vehicle inductor according to claim 1, characterized in that: the aging treatment in the step (7) is two-stage aging treatment, the temperature of the first aging treatment is 400 ℃ for 1-2h, the temperature of the second aging treatment is 400 ℃ for 500 ℃ for 2-4 h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001078.4A CN110773567B (en) | 2019-10-21 | 2019-10-21 | Pin riveting process of vehicle-mounted inductor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001078.4A CN110773567B (en) | 2019-10-21 | 2019-10-21 | Pin riveting process of vehicle-mounted inductor |
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| CN110773567A CN110773567A (en) | 2020-02-11 |
| CN110773567B true CN110773567B (en) | 2021-05-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2703333B2 (en) * | 1989-05-12 | 1998-01-26 | 株式会社東芝 | Magnetic head winding device |
| CN1098362C (en) * | 1998-10-09 | 2003-01-08 | 陈丕文 | Copper-base alloy and its prepn. technology |
| CN1111206C (en) * | 1999-08-20 | 2003-06-11 | 陈丕文 | High-conductivity copper base alloy for electrode of resistance welding |
| CN1207411C (en) * | 2003-01-01 | 2005-06-22 | 江西省科学院应用物理研究所 | High-strength and high-conductivity copper-base material and its prepn process |
| JP4282356B2 (en) * | 2003-03-31 | 2009-06-17 | 株式会社神戸製鋼所 | Electromagnetic forming coil |
| CN104125768A (en) * | 2014-07-16 | 2014-10-29 | 格力电器（合肥）有限公司 | Production process of digital tube |
| CN206059114U (en) * | 2016-10-10 | 2017-03-29 | 深圳诺维信电子科技有限公司 | A kind of heavy-current inductor with the pin that presses |
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