CN101255487A - Roller quenching inducer and method of use thereof - Google Patents
Roller quenching inducer and method of use thereof Download PDFInfo
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- CN101255487A CN101255487A CNA2008100184315A CN200810018431A CN101255487A CN 101255487 A CN101255487 A CN 101255487A CN A2008100184315 A CNA2008100184315 A CN A2008100184315A CN 200810018431 A CN200810018431 A CN 200810018431A CN 101255487 A CN101255487 A CN 101255487A
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- induction coil
- roll
- lower floor
- quenching
- upper strata
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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
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Abstract
The invention provides a roller hardening inductor and the using method thereof, belonging to the field of induction heat-treatment equipment. The inductor comprises upper layer line-frequency induction coil, a lower layer line-frequency induction coil and an insulating layer therebetween, when a roll is hardened, the rotating speed is 10-60r/min, the moving speed of the induction coils on the roll body needing to be hardened is 0.25-2.25mm/s, the temperature of the upper layer induction coil through the roll body is controlled below 20-40 DEG C by controlling the power of the upper layer induction coil. The invention has the advantages that: the hardenging layer of the roll is deepened, the heat treatment quality of the full hardening layer is improved, the service life of the roll is extended and the processing cost of the roll is lowered.
Description
Technical field
The invention belongs to Induction Heat Treatment Equipment and induction heat treatment field, relate in particular to the quenching inducer and the using method thereof of large-scale roller.
Background technology
Breaker roll carries out induction quenching and mainly still adopts single power frequency heat hardening induction coil and common power frequency to add the medium frequency quenching induction coil in the market, and single power frequency heat hardening induction coil is subjected to the restriction of its hot zone width, power supply control and equipment peak power, under the prerequisite that guarantees the quenching quality, working roll for Cr2, MC3 series is quenched deep layer about 15-20mm, intermediate roll is quenched deep layer about 20-25mm, and quenching rear surface hardness value fluctuates generally in 4HSD.The speed of rotation of roll was lower when common roller quenching inducer used, generally has only 5-30r/min, induction coil is also lower in need the quench translational speed of body of roll surface element position of roll, be generally 0.1-1.5mm/s, the temperature at the quenching body of roll position that induction coil passes through is higher, is generally 50-100 ℃.Power frequency adds the medium frequency quenching induction coil, and in second induction coil, because the effect of Medium frequency induction circle is mainly insulation, the heat of the main abutment surface of expansion of its diathermanous layer depth is undertaken by heat conducting mode.Common roll is along with the roll raising in work-ing life, and user's breaker roll deep layer of quenching requires more and more highlyer, and single power frequency heat hardening induction coil and common power frequency add the medium frequency quenching induction coil and be difficult to meet the demands.
Summary of the invention
The objective of the invention is to design a kind of roller quenching induction coil and using method thereof that can overcome the deficiencies in the prior art.
For achieving the above object, technical scheme of the present invention is: roller quenching inducer, have induction coil, and induction coil is made of upper strata induction coil and lower floor's induction coil, and upper and lower layer induction coil all is the line-frequency induction circle by independent current source control.
The number of turn of described upper strata induction coil is the 9-12 circle, and the number of turn of lower floor's induction coil is the 7-10 circle.
Be provided with insulation layer between the described upper and lower layer induction coil.
For the using method of aforementioned roller quenching inducer when breaker roll quenches, induction coil is enclosed within on the roll and moves from the bottom up, the speed of rotation of roll is 10-60r/min, induction coil is 0.25-2.25mm/s in need the quench translational speed at body surface position of roll, the temperature at the quenching body of roll position of the upper strata induction coil being passed through by control upper strata induction coil power is controlled at the following 20-40 of quenching temperature ℃, when this position during by the lower floor induction coil, the power by control lower floor induction coil rises to quenching temperature with the temperature at this position.
The invention has the beneficial effects as follows: can deepen the quench-hardened case of roll greatly, improve the thermal treatment quality at quench-hardened case position, improve roll work-ing life, reduce the Roller Machining cost.
Description of drawings
Fig. 1 is the structural representation of inductor block among the present invention.
Among the figure, 1 is the upper strata induction coil, and 2 is lower floor's induction coil, and 3 is insulation layer.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further.
Embodiment one: present embodiment is a structure embodiment of the present invention.
Roller quenching inducer, has induction coil, induction coil is made of upper strata induction coil 1 and lower floor's induction coil 2, upper and lower layer induction coil all is the line-frequency induction circle by independent current source control, the number of turn of upper strata induction coil 1 is 10 circles, the number of turn of lower floor's induction coil 2 is 8 circles, is provided with insulation layer 3 between the upper and lower layer induction coil.
Embodiment two: be method embodiment of the present invention.
When breaker roll quenches, be enclosed within on the roll induction coil mobile from the bottom up, the speed of rotation of roll is 50r/min, induction coil is 1.5mm/s in need the quench translational speed at body surface position of roll, the temperature at the quenching body of roll position of the upper strata induction coil being passed through by control upper strata induction coil power is controlled at below the quenching temperature 30 ℃, when this position during by the lower floor induction coil, the power by control lower floor induction coil rises to quenching temperature with the temperature at this position.
For ease of understanding, provide principle of work of the present invention below in conjunction with embodiment.
When workpiece quenches, the speed of rotation of roll is 50r/min, need quenching body of roll position from the bottom to top at first by the upper strata induction coil, translational speed is 1.5mm/s, by control upper strata induction coil power, temperature is controlled at below the quenching temperature about 30 ℃, to prevent the too high quality problems such as thick, the overheated and burning of crystal grain that cause of workpiece Yin Wendu in lower floor's induction coil.Diathermanous layer depth through workpiece behind the induction coil of upper strata has reached the degree of depth that common power frequency can reach substantially, after the heating position enters lower floor's induction coil, upper strata induction coil heat penetration position has surpassed the loss of excitation point (800 ℃) of workpiece substantially, the main effect of lower floor's induction coil is exactly to be no more than under the prerequisite of regulation quenching temperature in surface temperature, further expand the diathermanous layer depth of workpiece, its diathermanous layer depth can reach 74mm, under enough water-cooled conditions, can break through the darkest existing depth of hardening 45mm.
Claims (4)
1, roller quenching inducer has induction coil, it is characterized in that: induction coil is made of upper strata induction coil (1) and lower floor's induction coil (2), goes up (1), lower floor's induction coil (2) and all is the line-frequency induction circle by independent current source control.
2, roller quenching inducer according to claim 1 is characterized in that: the number of turn of described upper strata induction coil (1) is the 9-12 circle, and the number of turn of lower floor's induction coil (2) is the 7-10 circle.
3, roller quenching inducer according to claim 1 and 2 is characterized in that: described going up between (1), the lower floor's induction coil (2) is provided with insulation layer (3).
4, using method according to each described roller quenching inducer among the claim 1-3, it is characterized in that: when breaker roll quenches, be enclosed within on the roll induction coil mobile from the bottom up, the speed of rotation of roll is 10-60r/min, induction coil is 0.25-2.25mm/s in need the quench translational speed at body surface position of roll, the temperature at the quenching body of roll position of the upper strata induction coil being passed through by control upper strata induction coil power is controlled at the following 20-40 of quenching temperature ℃, when this position during by the lower floor induction coil, the power by control lower floor induction coil rises to quenching temperature with the temperature at this position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100184315A CN101255487A (en) | 2008-02-01 | 2008-02-01 | Roller quenching inducer and method of use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100184315A CN101255487A (en) | 2008-02-01 | 2008-02-01 | Roller quenching inducer and method of use thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101255487A true CN101255487A (en) | 2008-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100184315A Pending CN101255487A (en) | 2008-02-01 | 2008-02-01 | Roller quenching inducer and method of use thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN101255487A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620701A (en) * | 2011-06-30 | 2012-08-01 | 宝钢集团常州轧辊制造公司 | Method for measuring depth of roller body hardening layer |
| CN105349761A (en) * | 2015-11-10 | 2016-02-24 | 铜陵市明诚铸造有限责任公司 | Spray quenching process for alloy semi-steel roll |
-
2008
- 2008-02-01 CN CNA2008100184315A patent/CN101255487A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620701A (en) * | 2011-06-30 | 2012-08-01 | 宝钢集团常州轧辊制造公司 | Method for measuring depth of roller body hardening layer |
| CN105349761A (en) * | 2015-11-10 | 2016-02-24 | 铜陵市明诚铸造有限责任公司 | Spray quenching process for alloy semi-steel roll |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
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Open date: 20080903 |