CN110157884B - Heat treatment method of tin bronze wire hollow inductor - Google Patents
Heat treatment method of tin bronze wire hollow inductor Download PDFInfo
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- CN110157884B CN110157884B CN201910608478.5A CN201910608478A CN110157884B CN 110157884 B CN110157884 B CN 110157884B CN 201910608478 A CN201910608478 A CN 201910608478A CN 110157884 B CN110157884 B CN 110157884B
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- heat treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to a heat treatment method of a tin bronze wire hollow inductor, which completes a heat treatment process of the tin bronze wire hollow inductor by a tray for heat treatment and comprises the following steps: a. placing the formed hollow inductors into the heat treatment tray in batches; b. placing the heat treatment tray into a nitrate tempering furnace for aging treatment, wherein the aging temperature is controlled at 350 ℃ and the time is controlled at 5-10 min; c. after the aging is finished, placing the heat treatment tray into water or cooling oil with the temperature of 5-20 ℃ for cooling, wherein the cooling time is controlled to be 7 min; d. and taking out each hollow inductor from the heat treatment tray. The heat treatment tray includes a base plate, a cover plate, and a seal ring. The cover plate is buckled right above the base plate, and the sealing ring is clamped between the cover plate and the base plate to form a sealing cavity. A plurality of placing grooves are uniformly distributed in a sealing area of the upper plane of the substrate and are used for fixing the hollow inductor. The base plate and the cover plate are both made of copper or copper alloy materials.
Description
Technical Field
The invention relates to the technical field of inductance coil manufacturing, in particular to a heat treatment method of a tin bronze wire hollow inductor.
Background
An inductor is a device that operates using the principle of electromagnetic induction. When current flows through a wire, a certain electromagnetic field is generated around the wire, and the wire of the electromagnetic field induces the wire in the range of the electromagnetic field. Inductance coils are widely used in the electronic component manufacturing industry and are generally cold-rolled by means of a spring machine. However, the highly conductive wire used to make the inductor is relatively thin (less than 2mm), and causes a large internal stress in the inductor itself during the winding process. In the practical use process, the induction coil which is not subjected to stress relief treatment is found to be easy to generate elastic recovery phenomenon within a period of time after being wound and formed, so that the size precision of the induction coil is influenced, the positioning and spot welding operation in the later assembling process is influenced, and the working performance, the assembling efficiency and the finished product qualification rate of the electronic component are influenced.
In order to solve the above technical problems, some proposals have been made in recent years to perform stress relief treatment on a formed inductor coil, and common process methods include a continuous hot air tempering electric furnace, a hot air circulation tempering electric furnace, a box body electric furnace and a nitrate tempering furnace, wherein, the nitrate tempering furnace has the advantages of faster heating speed and relatively shorter heat preservation time, therefore, it is becoming more and more widely used, however, it also presents some more serious problems, for example, in the heat treatment process, molten nitrate in the furnace can corrode the surface of the inductance coil, so that the subsequent processes must be added with a cleaning process, an anti-rust water soaking process and an air drying process, thus, the length of the post-processing process route of the inductor coil is greatly reduced, and the manufacturing cost of the inductor coil is increased, so that a skilled person is urgently required to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heat treatment method of a tin bronze wire hollow inductor by using a tray.
In order to solve the technical problem, the invention relates to a heat treatment method of a tin bronze wire hollow inductor, which completes a heat treatment process of the tin bronze wire hollow inductor by a tray for heat treatment. The heat treatment tray includes a base plate, a cover plate, and a seal ring. The cover plate is buckled right above the base plate, and the sealing ring is clamped between the cover plate and the base plate to form a sealing cavity. A plurality of placing grooves are uniformly distributed in a sealing area of the upper plane of the substrate and are used for fixing the hollow inductor. Both the base plate and the cover plate are made of copper or copper alloy material having high thermal conductivity. At least one annular groove is arranged around the periphery of the base plate and/or the cover plate and used for placing the sealing ring. The sealing ring is preferably a graphite self-sealing ring. The cover plate is detachably buckled on the upper surface of the base plate by means of screws, a plurality of through holes matched with the screws are formed in the periphery of the cover plate, and correspondingly, a plurality of threaded holes are formed in the corresponding positions of the base plate. Herringbone corrugated grooves are arranged on the non-binding surfaces of the base plate and the cover plate. And a flow guide hole is arranged on the side wall of the substrate and close to the placing groove. The quantity of water conservancy diversion hole sets up to a plurality ofly, along the length direction equipartition of base plate. The unilateral clearance value between the fixed groove and the hollow inductor is controlled to be less than 0.2mm, and the depth value of the unilateral clearance value is consistent with the height value of the hollow inductor. The heat treatment method of the tin bronze wire hollow inductor comprises the following steps:
a. placing the formed hollow inductors into the heat treatment tray in batches;
b. placing the heat treatment tray into a nitrate tempering furnace for aging treatment, wherein the aging temperature is controlled at 350 ℃ and the time is controlled at 5-10 min;
c. after the aging is finished, placing the heat treatment tray into water or cooling oil with the temperature of 5-20 ℃ for cooling, wherein the cooling time is controlled to be 7 min;
d. and taking out each hollow inductor from the heat treatment tray.
By adopting the technical scheme, in the later heat treatment process of the hollow inductor, the hollow inductor can be effectively isolated from molten nitrate by virtue of the sealing cavity of the tray, so that the hollow inductor is prevented from being corroded, and the procedures of cleaning, coating anti-rust liquid and air drying in the conventional heat treatment process are omitted, so that the heat treatment efficiency of the hollow inductor is greatly improved, and the production cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an assembled perspective view of a first embodiment of a heat treatment tray according to the present invention.
FIG. 2 is a schematic view showing the structure of a substrate in a first embodiment of the thermal processing tray of the present invention.
FIG. 3 is a schematic view showing the structure of a cover plate in the first embodiment of the tray for heat treatment according to the present invention.
Fig. 4 is an assembled perspective view of a second embodiment of the heat treatment tray of the present invention.
FIG. 5 is a schematic view showing the structure of a substrate in a second embodiment of the heat treatment tray of the present invention.
Fig. 6 is a bottom view of fig. 5.
Fig. 7 is a schematic structural view of a cover plate in a second embodiment of the tray for heat treatment according to the present invention.
1-a substrate; 11-placing a groove; 12-an annular groove; 13-a threaded hole; 14-herringbone corrugated flutes; 15-diversion holes; 2-cover plate; 21-a through hole; 3-sealing ring.
Detailed Description
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Referring to the following embodiments, the contents of the present invention will be further described in detail, and fig. 1 is an assembly perspective view illustrating a first embodiment of the heat treatment tray of the present invention, which mainly comprises a base plate 1, a cover plate 2, and a sealing ring 3, wherein the cover plate 2 is fastened directly above the base plate 1, and the sealing ring 3 is sandwiched between the two to form a sealing cavity. A plurality of placing grooves 11 are uniformly distributed in the sealing area of the upper plane of the substrate 1 for fixing the air core inductor (as shown in fig. 2). Therefore, in the later heat treatment process of the hollow inductor, the hollow inductor can be effectively isolated from the molten nitrate by virtue of the sealing cavity of the tray, the risk that the hollow inductor is corroded is avoided, the procedures of cleaning, coating anti-rust liquid and air drying in the conventional heat treatment process are omitted, the heat treatment efficiency of the hollow inductor is greatly improved, and the production cost is reduced.
In order to ensure the stability of fixing the hollow inductor and prevent the hollow inductor from being heated and plastically deformed in the subsequent heat treatment process, the value of the unilateral gap between the fixing groove 11 and the hollow inductor needs to be controlled below 0.2mm, and the depth value of the unilateral gap is consistent with the height value of the hollow inductor.
It should be noted that, in order to ensure the heat transfer efficiency between the molten nitrate and the tray, the base plate 1 and the cover plate 2 are made of high thermal conductivity materials, such as copper and copper alloy. In addition, the sealing ring 3 is also made of a high heat-resistant rubber ring, such as a perfluoro rubber ring, which can instantaneously resist up to 327 ℃. Of course, the most preferred option is a graphite self-sealing ring.
In order to prevent the sealing ring 3 from changing its position during use and thus affecting the sealing performance of the sealing cavity, an annular groove 12 (as shown in fig. 2) may be formed around the periphery of the substrate 1 for receiving the sealing ring 3 to secure its position. Of course, the specific number and the opening position of the annular grooves 12 can be selected according to actual conditions. Of course, similar to the arrangement of the substrate 1, an annular groove for placing the sealing ring may be formed around the periphery of the cover plate 2. It should be noted that, in order to achieve both sealing performance and installation convenience, the single-side gap between the sealing ring 3 and the side wall of the annular groove 12 needs to be controlled, and is preferably 0.2-0.3 mm.
In order to facilitate the mounting process of the cover plate 2, the cover plate and the base plate 1 should be detachably connected, and the following scheme is preferred: the cover plate 2 is detachably fastened to the upper surface of the base plate 1 by screws, and a plurality of through holes 21 (shown in fig. 3) adapted to the screws are formed along the periphery of the cover plate 2, and correspondingly, a plurality of threaded holes 13 (shown in fig. 2) are formed at corresponding positions of the base plate 1. It is known that the threaded holes 13 are susceptible to wear during long-term use, leading to damage and failure of the base plate 1, and for this purpose, the threaded hole 13 region of the base plate 1 may be subjected to a local quenching treatment to increase the surface hardness of the threads thereof. Of course, the inner wall of the threaded hole 13 may be coated with a wear-resistant coating.
Generally, the thickness of the substrate 1 is larger and is generally controlled to be 25-30mm, so that the heat exchange efficiency between the tray and the molten nitrate is lower, the temperature rise speed of the tray is reduced, the temperature rise speed of the hollow inductor is further reduced, and the execution of the aging process is not facilitated. Fig. 4 is an assembled perspective view showing a second embodiment of the tray for heat treatment according to the present invention, which is different from the first embodiment in that a flow guide hole 15 (shown in fig. 5) is formed in the sidewall of the base plate 1 in the vicinity of the placement recess 11, thereby effectively increasing the heat exchange efficiency between the molten nitrate and the tray. The specific design method is recommended as follows: the number of the flow guide holes 15 is set to be a plurality, and the flow guide holes are uniformly distributed along the length direction of the substrate 1.
In order to improve the heat exchange efficiency of the molten nitrate and the tray and reduce the heat treatment time of the air core inductor, as a further optimization, herringbone corrugated grooves 14 (as shown in fig. 6) can be further arranged on the non-bonding surface of the base plate 1, and the cover plate 2 is arranged similarly to the base plate 1 (as shown in fig. 7). Thus, during the heat treatment, the molten nitrate can flow along the herringbone corrugated grooves 14, and the heat exchange path is extended, thereby improving the heat exchange efficiency. In addition, the herringbone corrugated grooves 14 can form certain turbulent flow in the cavity of the nitrate tempering furnace, so that the heat exchange efficiency between the molten nitrate is enhanced.
In addition, the invention also discloses a heat treatment method of the tin bronze wire hollow inductor, which comprises the following steps:
a. placing the formed hollow inductors into the heat treatment tray in batches;
b. placing the heat treatment tray into a nitrate tempering furnace for aging treatment, wherein the aging temperature is controlled to be 350 +/-5 ℃, and the time is controlled to be 5-10 min;
c. after the aging is finished, placing the heat treatment tray into cooling liquid at 5-20 ℃ for cooling for not less than 2 min;
d. and taking out each hollow inductor from the heat treatment tray.
The operation method of the tin bronze wire hollow inductance heat treatment comprises the following steps: 1. placing the hollow inductor into the placing groove on the substrate; 2. placing the cover plate right above the base plate, and locking by using a screw to form a sealed cavity between the cover plate and the base plate; 3. testing the sealing performance of the sealed cavity; 4. and after the test is qualified, the tray is implanted into a nitrate tempering furnace for heat treatment.
Long-term experiment results show that the time effect temperature is controlled to be 350 ℃, the time effect time is controlled to be 7min, and the time-domain induction coil has the minimum elastic recovery, so that the subsequent assembly process and the actual working performance are ensured.
Finally, it should be noted that the cooling liquid may be cooling water which is available at a low cost. Of course, cooling oil can be selected as the cooling medium according to the actual process requirements. Compared with cooling water, the cooling oil has a smoother temperature drop curve, so that the hollow inductance coil has a better heat treatment effect.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A heat treatment method of a tin bronze wire hollow inductor is characterized in that a heat treatment process of the tin bronze wire hollow inductor is completed by a tray for heat treatment; the tray for heat treatment comprises a base plate, a cover plate and a sealing ring; the cover plate is buckled right above the base plate, and the sealing ring is clamped between the cover plate and the base plate to form a sealing cavity; a plurality of placing grooves are uniformly distributed in a sealing area of the upper plane of the substrate and are used for fixing the hollow inductor; the base plate and the cover plate are both made of copper or copper alloy materials with high thermal conductivity; at least one annular groove is arranged around the periphery of the base plate and/or the cover plate and used for placing the sealing ring; the sealing ring is a graphite self-sealing ring; the cover plate is detachably buckled on the upper surface of the base plate by means of screws, a plurality of through holes matched with the screws are formed in the periphery of the cover plate, and correspondingly, a plurality of threaded holes are formed in the corresponding positions of the base plate; herringbone corrugated grooves are formed in the non-binding surfaces of the substrate and the cover plate; a flow guide hole is formed in the side wall of the substrate and close to the placing groove; the number of the flow guide holes is set to be a plurality of, and the flow guide holes are uniformly distributed along the length direction of the substrate, the value of the unilateral gap between the fixed groove and the hollow inductor is controlled to be less than 0.2mm, and the depth value of the unilateral gap is consistent with the height value of the hollow inductor; the heat treatment method of the tin bronze wire hollow inductor comprises the following steps:
a. placing the formed hollow inductors into the heat treatment tray in batches;
b. placing the heat treatment tray into a nitrate tempering furnace for aging treatment, wherein the aging temperature is controlled at 350 ℃ and the time is controlled at 5-10 min;
c. after the aging is finished, placing the heat treatment tray into water or cooling oil with the temperature of 5-20 ℃ for cooling, wherein the cooling time is controlled to be 7 min;
d. and taking out each hollow inductor from the heat treatment tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910608478.5A CN110157884B (en) | 2019-07-08 | 2019-07-08 | Heat treatment method of tin bronze wire hollow inductor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910608478.5A CN110157884B (en) | 2019-07-08 | 2019-07-08 | Heat treatment method of tin bronze wire hollow inductor |
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| CN110157884A CN110157884A (en) | 2019-08-23 |
| CN110157884B true CN110157884B (en) | 2021-06-15 |
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| CN202688377U (en) * | 2012-07-12 | 2013-01-23 | 唐山西境环保科技有限公司 | Device for recycling salt by using quenching afterheat |
| US10018418B2 (en) * | 2014-01-07 | 2018-07-10 | Can-Eng Partners Limited | Mobile removable hearth for furnace and transporter |
| CN203976882U (en) * | 2014-07-30 | 2014-12-03 | 武汉钢铁(集团)公司 | In heat treatment furnace, carry the high-performance drop-bottom of coil of strip |
| CN104674054A (en) * | 2015-03-12 | 2015-06-03 | 天津理工大学 | High-strength copper-titanium alloy and preparation method thereof |
| CN205856528U (en) * | 2016-08-16 | 2017-01-04 | 哈尔滨汽轮机厂有限责任公司 | A kind of vacuum heat treatment furnace workpiece Anti-tarnishing frock |
| CN208328072U (en) * | 2018-05-02 | 2019-01-04 | 庆铃汽车（集团）有限公司 | It is heat-treated heat resistant article material frame |
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