CN104673982A - Heating method and device for induction heat treatment of converging tube parts - Google Patents
Heating method and device for induction heat treatment of converging tube parts Download PDFInfo
- Publication number
- CN104673982A CN104673982A CN201310631303.9A CN201310631303A CN104673982A CN 104673982 A CN104673982 A CN 104673982A CN 201310631303 A CN201310631303 A CN 201310631303A CN 104673982 A CN104673982 A CN 104673982A
- Authority
- CN
- China
- Prior art keywords
- ruhmkorff coil
- induction heat
- heating
- induction coil
- heat treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
The invention provides a heating method for induction heat-treatment of converging tube parts, which is characterized by comprising the following steps: 1) preparation of induction coil: preparing the induction coil into a flared shape capable of adapting to the external surface of the heated position of the tube part, wherein the internal diameter of the induction coil is slightly greater than the external diameter of the part, the taper degree of the induction coil is the same as that of the heated position of the part, insulation cotton is wrapped outside the induction coil, and the induction coil is connected with an induction heat treatment facility; 2) extending the heated position of the part into the induction coil, and attaching the heated position of the part to the induction coil; and 3) electrifying the induction coil to heat the part.
Description
Technical field
The present invention relates to thermal treatment heat treated, particularly a kind of surface heated method and apparatus for carrying out induction heat treatment to pipe part.
Background technology
Induction heat treatment heating utilizes ruhmkorff coil to produce alternating electromagnetic field to make piece surface produce magnetic eddy current and metal parts surface is heated, to realize a kind of special process requirement of over-all properties of surface layer abrasion-proof, heart portion high-ductility, organize comparatively thin after quenching, the high 2 ~ 4HRC of its hardness ratio normal quenching; In addition, after hard surfacing, form large residual compressive stress because the intensity in top layer own significantly improves with top layer, induced surface hardening can improve the anti-fatigue performance of part significantly.
For the pull bar part (pipe part) of helicopter control system, need to carry out partial heat treatment (as Fig. 1) after carrying out hammering closing in two ends.Because the reducing position of such part is horn-like, the method for induction heating is unreasonable, and heated part can be caused to heat uneven, heat-treated sturcture is inconsistent, and the performance after thermal treatment there are differences, and anti-fatigue performance can not get improving.
Existing heating means are: the diameter of ruhmkorff coil is manufactured to obtain 3 ~ 5mm larger than part reducing position maximum outside diameter, part is placed on support, adjusting pole height, part manually makes part reducing position move back and forth in ruhmkorff coil along ruhmkorff coil axial direction due to carry out heating (as Fig. 2).There is following shortcoming in this kind of mode:
1) need the reducing position of heating dock with ruhmkorff coil easy occur not in place;
2) need the distance on the surface of heating position (reducing position) restive, heats difference is large;
3) in the operating process moved back and forth, ruhmkorff coil contacts with as easy as rolling off a log generation of part and causes shocking by electricity and parts locally is melted, and causes part rejection;
4) Artificial Control part translational speed and frequency, part is heated uneven, and heat-treated sturcture is inconsistent.
Summary of the invention
The invention provides the heating means of a kind of reducing tubing part induction heat process, it is characterized in that, comprise the following steps:
1) preparation of ruhmkorff coil
Ruhmkorff coil is made need the position outside surface heated to adapt with pipe part horn-like, the internal diameter of ruhmkorff coil is more bigger than the external diameter of part; Tapering and the part of ruhmkorff coil need the tapering at the position of heating consistent; It is cotton that ruhmkorff coil is wrapped with insulation; Ruhmkorff coil is connected with Induction Heat Treatment Equipment;
2) position of heating is needed to stretch in ruhmkorff coil and to fit part;
3) ruhmkorff coil energising, heated components.
Ruhmkorff coil and part need coordinating of the size at the position of heating and tapering, and part needs the position of heating and ruhmkorff coil to fit tightly, and the gap of heater coil and part is controlled, and makes heat parts even; Simultaneously do not need moving parts due to during heating, can avoid because mishandle occurs that ruhmkorff coil directly contacts with part and causes electric shock to make parts locally melt; When actual mechanical process, shorten the docking time of part and ruhmkorff coil, improve working (machining) efficiency.
A kind of embodiment of heating means of the present invention is the large 1 ~ 2mm of the external diameter at the internal diameter of ruhmkorff coil position more to be heated than part, adopts the gap of the 1 ~ 2mm cotton effect of placement insulation better.
Present invention also offers the device implementing these heat treated heating means, comprise ruhmkorff coil, Induction Heat Treatment Equipment, described ruhmkorff coil is connected with Induction Heat Treatment Equipment, it is characterized in that, also comprise insulation cotton, described ruhmkorff coil adopt need the position outside surface heated to adapt with pipe part horn-like, the internal diameter of described ruhmkorff coil is more bigger than the external diameter of part, tapering and the part of described ruhmkorff coil need the tapering at the position of heating consistent, it is cotton that described ruhmkorff coil is wrapped with insulation, part needs heating position outside surface and is wrapped with the cotton ruhmkorff coil that insulate to keep fitting.
Accompanying drawing illustrates:
Fig. 1 is reducing pipe part schematic diagram
Fig. 2 is the heating unit working state schematic representation (analysing and observe) of reducing tubing part induction heat of the present invention process;
Fig. 3 is the heating unit working state schematic representation of reducing tubing part induction heat of the present invention process;
Embodiment:
Heating means of the present invention:
1) preparation of ruhmkorff coil
Ruhmkorff coil is made need the position outside surface heated to adapt with pipe part horn-like, the internal diameter 1-2mm larger than the external diameter of part of ruhmkorff coil; Tapering and the part of ruhmkorff coil need the tapering at the position of heating consistent; It is cotton that ruhmkorff coil is wrapped with insulation; Ruhmkorff coil is connected with Induction Heat Treatment Equipment;
2) position of heating is needed to stretch in ruhmkorff coil and to fit part;
3) ruhmkorff coil energising, heated components.
Heat complete taking-up, will be quenched by heating region water or oil cooling.
Consult Fig. 2 and Fig. 3, implement the equipment of these heating means, comprise ruhmkorff coil 1, Induction Heat Treatment Equipment 2, ruhmkorff coil 1 is connected with Induction Heat Treatment Equipment 2, it is characterized in that, also comprise insulation cotton 3, ruhmkorff coil 1 adopt with pipe part need the position outside surface heated to adapt horn-like, the internal diameter 1-2mm larger than the external diameter of part of ruhmkorff coil 1, tapering and the part of ruhmkorff coil 1 need the tapering at the position of heating consistent, ruhmkorff coil 1 is wrapped with insulation cotton 3, and part needs heating position outside surface and be wrapped with cotton 3 ruhmkorff coils 1 that insulate to keep fitting.
When exchange current is by ruhmkorff coil, around it, creates alternating magnetic field, will be placed on inside ruhmkorff coil by heated components, due to the effect of electromagnetic induction, make to produce induced current in part, part outside surface is heated rapidly.In addition, when electric current is by conductor (part), maximum along piece surface current density, more less toward central current density, thus realize the surface heating of part.Because the tapering of ruhmkorff coil needs the tapering at the position of heating consistent with part, part outside surface is heated evenly.
Claims (3)
1. heating means for reducing tubing part induction heat process, is characterized in that, comprise the following steps:
1) preparation of ruhmkorff coil
Described ruhmkorff coil is made need the position outside surface heated to adapt with pipe part horn-like, the internal diameter of described ruhmkorff coil is more bigger than the external diameter of part; Tapering and the part of described ruhmkorff coil need the tapering at the position of heating consistent; It is cotton that described ruhmkorff coil is wrapped with insulation; Ruhmkorff coil is connected with Induction Heat Treatment Equipment;
2) position of heating is needed to stretch in ruhmkorff coil and to fit part;
3) ruhmkorff coil energising, heated components.
2. the heating means of reducing tubing part induction heat according to claim 1 process, is characterized in that, the large 1 ~ 2mm of external diameter at the internal diameter position more to be heated than part of described ruhmkorff coil.
3. implement the claims the device of the heating means of reducing tubing part induction heat process described in 1, comprise ruhmkorff coil (1), Induction Heat Treatment Equipment (2), described ruhmkorff coil (1) is connected with Induction Heat Treatment Equipment (2), it is characterized in that, also comprise insulation cotton (3), described ruhmkorff coil (1) adopt with pipe part need the position outside surface heated to adapt horn-like, the internal diameter of described ruhmkorff coil (1) is more bigger than the external diameter of part, tapering and the part of described ruhmkorff coil (1) need the tapering at the position of heating consistent, described ruhmkorff coil (1) is wrapped with insulation cotton (3), part needs heating position outside surface and is wrapped with cotton (3) ruhmkorff coil (1) of insulating to keep fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631303.9A CN104673982A (en) | 2013-12-02 | 2013-12-02 | Heating method and device for induction heat treatment of converging tube parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631303.9A CN104673982A (en) | 2013-12-02 | 2013-12-02 | Heating method and device for induction heat treatment of converging tube parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104673982A true CN104673982A (en) | 2015-06-03 |
Family
ID=53309564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310631303.9A Pending CN104673982A (en) | 2013-12-02 | 2013-12-02 | Heating method and device for induction heat treatment of converging tube parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104673982A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4442331A (en) * | 1981-01-22 | 1984-04-10 | Dai Ichi High Frequency Company, Ltd. | Method and apparatus of induction heating a metallic elongated material having different thickness sections |
| CN2124537U (en) * | 1992-06-06 | 1992-12-09 | 云南省曲靖农药厂 | Intermediate-frequency electromagnetic induction heater |
| CN100395353C (en) * | 2006-08-01 | 2008-06-18 | 宁波跃进汽车前桥有限公司 | Inducing quenching and tempering process of automobile knuckle |
| CN100505956C (en) * | 2004-04-28 | 2009-06-24 | 高周波热炼株式会社 | Induction heating coil and induction heating method for multi-step shaft member |
| CN102328066A (en) * | 2011-08-31 | 2012-01-25 | 中国科学院金属研究所 | Vacuum-positive pressure smelting and solidifying equipment |
| CN102864294A (en) * | 2012-10-09 | 2013-01-09 | 贵州师范大学 | Method and device of local heat treatment for thin-walled tubular parts |
-
2013
- 2013-12-02 CN CN201310631303.9A patent/CN104673982A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4442331A (en) * | 1981-01-22 | 1984-04-10 | Dai Ichi High Frequency Company, Ltd. | Method and apparatus of induction heating a metallic elongated material having different thickness sections |
| CN2124537U (en) * | 1992-06-06 | 1992-12-09 | 云南省曲靖农药厂 | Intermediate-frequency electromagnetic induction heater |
| CN100505956C (en) * | 2004-04-28 | 2009-06-24 | 高周波热炼株式会社 | Induction heating coil and induction heating method for multi-step shaft member |
| CN100395353C (en) * | 2006-08-01 | 2008-06-18 | 宁波跃进汽车前桥有限公司 | Inducing quenching and tempering process of automobile knuckle |
| CN102328066A (en) * | 2011-08-31 | 2012-01-25 | 中国科学院金属研究所 | Vacuum-positive pressure smelting and solidifying equipment |
| CN102864294A (en) * | 2012-10-09 | 2013-01-09 | 贵州师范大学 | Method and device of local heat treatment for thin-walled tubular parts |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150603 |