CN113186375A - Gear induction quenching device and process - Google Patents
Gear induction quenching device and process Download PDFInfo
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- CN113186375A CN113186375A CN202110432070.4A CN202110432070A CN113186375A CN 113186375 A CN113186375 A CN 113186375A CN 202110432070 A CN202110432070 A CN 202110432070A CN 113186375 A CN113186375 A CN 113186375A
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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
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
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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
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
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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
- C21D11/00—Process control or regulation for heat treatments
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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
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
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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
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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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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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- General Induction Heating (AREA)
Abstract
The invention relates to a gear induction quenching device and a process, which comprises a lifting motor, a fixing plate, a fixing rod, a temperature sensor, a temperature adjusting assembly, a water tank, a heating assembly, a gear and a lifting slide rail, wherein the process comprises the steps of setting parameters, clamping and positioning the gear, driving a magnetizer to uniformly heat a tooth root by a rotating motor and the like; the device controls the rotation of the magnetizer through the adjustment of parameters, so that the thermal expansion amount along the tooth profile direction is accurately controlled, and the depth and the uniformity of a tooth surface hardening layer after the gear is machined are ensured; the process fully utilizes the effects of magnetic gathering and flow driving of the magnetizer, solves the limitation that the profiling induction coil in the prior art can only heat a designated workpiece, and realizes that one quenching device can uniformly heat gears with different numbers of teeth but different modulus.
Description
Technical Field
The invention relates to the technical field of gear heat treatment, in particular to a gear induction quenching device and a gear induction quenching process.
Background
In the field of high-end gears, along with the development of industry, the working condition of the gears is more complex, the borne load is continuously increased, higher requirements are provided for the quality and the reliability of the gears, the cold-processed gears often need to be subjected to heat treatment to obtain good comprehensive mechanical properties, but when the gears are quenched, the tooth profiles of the gears are easy to cause uneven heating temperature, the hardness of the quenched gears is uneven, and the conditions of tooth breakage and tooth breakage are easy to occur in the gear transmission process. In the prior heat treatment technology, a high-end gear is inductively heated by utilizing a profiling induction coil, the temperature uniformity of the surface temperature of the tooth profile of the gear is improved to a certain extent, but due to the influence of the proximity effect and the boundary effect of the induction heating, the temperature distribution phenomenon that the temperature of the edge of the tooth profile of the gear heated by the profiling induction coil is high and the temperature of the middle of the tooth profile of the gear is low is caused, meanwhile, when the gear is inductively heated by the traditional profiling coil, the magnetic force line at the tooth root is disordered, the distance between the coil and the tooth root is large, the temperature of the top of the gear is high, the temperature of the tooth root is low, the further accurate quenching of the gear by the profiling induction heating is limited under the conditions, the shape of the conventional profiling induction coil is fixed, the processing object is single, the dynamic adjustment cannot be timely carried out according to the heating condition of the gear in processing, the heating on the surface of the tooth profile surface is not uniform, the metal microstructures of all parts of the tooth profile after the heat treatment are different, The gear works and is reduced due to different mechanical properties, and the normal use of the gear is influenced. Therefore, a general heat treatment process suitable for determining the number of teeth is needed to fully utilize the advantages of the conventional profiling heating method, thereby prolonging the service life of the gear.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an apparatus and a process for gear induction quenching, wherein the U-shaped magnetizer concentrates magnetic force lines at the tooth root, and the concentrated magnetic force lines act on the tooth root through the rotation of the U-shaped magnetizer, so that the heating efficiency of the tooth root is improved, and simultaneously, the U-shaped magnetizer swings up and down to uniformly heat the tooth root.
The technical scheme adopted by the invention is as follows:
the invention provides a gear induction quenching device which comprises a lifting motor, a fixing plate, a fixing rod, a temperature sensor, a temperature adjusting assembly, a water tank, a heating assembly and a lifting slide rail, wherein the lifting motor and the lifting slide rail are respectively arranged above the center of the fixing plate and below the center of the fixing plate, the input end surface of the lifting slide rail is flush with the output end surface of the lifting motor, the lower end of the lifting slide rail is provided with a gear, the axis of the lifting motor, the axis of the lifting slide rail and the axis of the gear are all overlapped, and the outer side of the gear is provided with a starfish induction coil and a profiling induction coil to respectively realize the rapid temperature rise of the tooth top and the tooth root; the profiling induction coil is arranged on the upper side of the starfish-shaped induction coil, the starfish-shaped induction coil and the profiling induction coil are connected with a power supply, a plurality of groups of temperature adjusting assemblies are arranged at the bottom corner of the profiling induction coil, a temperature sensor is arranged above the bottom corner of the profiling induction coil, the temperature sensor is connected with the lower end face of the fixed plate through the fixed rod, and the water tank is arranged at the bottom of the device; the temperature adjusting component comprises a rotating motor, a vertical sliding rail, a sliding block, a telescopic rod, a first magnetizer fixing rod, a U-shaped magnetizer, a second magnetizer fixing rod, a semicircular guide rail and a vertical guide rail fixing rod, the rotating motor is arranged on the fixing plate, the vertical sliding rail is coaxially connected with the rotating motor, the lower end surface of the telescopic rod is connected with the upper end surface of the water tank, the slide block and the vertical slide rail form a sliding pair, the two ends of the telescopic rod are respectively connected with the slide block and the first magnetizer fixing rod, the first end of the first magnetizer fixing rod and the first end of the second magnetizer fixing rod are both connected with the U-shaped magnetizer, the second end of the first magnetizer fixing rod and the second end of the second magnetizer fixing rod are both spherical, the second end of the first magnetizer fixing rod and the second end of the second magnetizer fixing rod are tangent to the inner side of the vertical semicircular guide rail to form a sliding pair; the telescopic link includes fixed cover, expanding spring and extension rod, the both ends of fixed cover link to each other with slider, expanding spring's first end respectively, expanding spring's second end links to each other with the first end of extension rod, the second end of extension rod with the second end of first magnetizer dead lever links to each other, fixed cover, expanding spring, extension rod coaxial line.
Preferably, the upper end of the semicircular guide rail is connected with the lower end of a vertical guide rail fixing rod, the upper end face of the vertical guide rail fixing rod is flush with the lower end face of the fixing plate, the U-shaped magnetizer is placed at the bottom corner of the profiling induction coil, and the semicircular guide rail and the U-shaped magnetizer are coaxial and coplanar.
Preferably, the inner side of the U-shaped magnetizer is semicircular, the outer side of the U-shaped magnetizer is rectangular, the extension lines of the first magnetizer fixing rod and the second magnetizer fixing rod both penetrate through the circle center of the semicircular guide rail, and the first magnetizer fixing rod and the second magnetizer fixing rod are perpendicular.
An induction quenching process based on the gear induction quenching device comprises the following steps:
s1, setting multiple groups of heating parameters by the system: temperature T required for heating tooth top for the first time0Temperature interval t to which gear is required to reach0-Δt～t0+Δt；
S2, after the device is installed, the starfish-shaped induction coil is electrified to carry out primary heating, the temperature of the tooth profile is recorded in real time by using the temperature sensor, and if the temperature T of the tooth top reaches the preset value T of the system0I.e. T.gtoreq.T0Then the current of the starfish induction coil is cut off; if the temperature T of the tooth top does not reach the preset value of the system, namely T is less than T0Then heating is continued until T ≧ T is satisfied0；
S3, electrifying the profiling induction coil, controlling the lifting motor to lift the gear at the same time, enabling the lower end face of the gear to be flush with the lower end face of the profiling induction coil, and heating for the second time;
s4, controlling a rotating motor to enable a sliding block to drive a telescopic rod to move up and down, and enabling the telescopic rod to stretch and retract while moving up and down, so that the spherical outer ends of a first magnetizer fixing rod and a second magnetizer fixing rod move along a semicircular guide rail, a U-shaped magnetizer rotates around a tooth root of the profiling induction coil, and the temperature rise of the tooth root is accelerated by changing the distribution of magnetic lines of force of the tooth root;
s5, measuring the tooth top t in real time by the temperature sensor1And tooth t2When the tip temperature is greater than the root temperature, i.e. t1＞t2When the magnetic field induction heating tooth is used, the U-shaped magnetizer rotates towards the horizontal direction of the opening, the magnetic field at the tooth root is converged by utilizing the magnetism gathering and drainage effect of the magnetizer, the magnetic field induction heating efficiency is improved, and the tooth is acceleratedThe root temperature increases; when the tip temperature is lower than the root temperature, i.e. t1＜t2When the magnetic field is applied to the tooth root, the U-shaped magnetizer rotates towards the opening in the downward direction, and the magnetic field is converged downwards by utilizing the conduction effect of the magnetizer, so that the temperature rise of the tooth root is slowed down; until the temperature of the tooth top and the tooth root is in the set temperature range of the gear, namely the surface temperature t of the gear1-Δt≤t≤t1+ delta t, the current of the profiling induction coil is cut off, if the preset condition of the system is not met, the heating is continued until t is met1-Δt≤t≤t1+Δt；
And S6, lowering the gear into the water tank through the lifting motor, quenching the gear in the water tank, and cutting off the power supply of the lifting motor after the gear is quenched.
The invention has the beneficial effects that:
1) the rotation of the magnetizer is realized by matching the slide rail, the telescopic rod and the semicircular guide rail, the functions of magnetism gathering and flow driving of the magnetizer are fully utilized, the uniform heating of the gear is realized, the defect that in the prior art, a profiling coil can only heat gears with fixed specifications and corresponding gear heating and quenching devices are required to be manufactured for gears with different specifications is overcome, the method realizes that one gear heating and quenching device can uniformly heat gears with different numbers of teeth but different moduli, the use efficiency of the gear heating and quenching device is greatly increased, and the production cost is reduced;
2) the induction heating device with the same tooth number is selected according to the tooth number of the gear to be processed, the heating time and the rotating speed of the rotating motor are adjusted according to the tooth profile temperature monitored in real time, the temperature of the tooth profile surface can be accurately controlled to be uniform and reach the standard, the uniform surface temperature of the gear obtained after treatment is ensured, the quenching hardness, the depth and the uniformity are good, the product requirements are met, and the quenching quality and the quenching efficiency are improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of one embodiment of an induction hardening apparatus and process for gears according to the present invention;
FIG. 2 is a schematic structural view of the temperature adjustment assembly of the present invention;
FIG. 3 is a schematic view of the construction of the heating assembly of the present invention;
FIG. 4 is a schematic representation of the operation of a portion of the components of the present invention with the root temperature being greater than the tip temperature;
FIG. 5 is a process flow diagram for gear quenching according to the present invention.
Reference numerals:
1. a lifting motor; 2. a fixing plate; 3. fixing the rod; 4. a temperature sensor; 5. a temperature regulating component; 6. a water tank; 7. a heating assembly; 8. a gear; 9. lifting the slide rail; 51. a rotating electric machine; 52. a vertical slide rail; 53. a slider; 54. a telescopic rod; 55. a first magnetizer fixing rod; 56. a U-shaped magnetizer; 57. a second magnetizer fixing rod; 58. a semicircular guide rail; 59. a vertical guide rail fixing rod; 71. a starfish-shaped induction coil; 72. a profiling induction coil; 73. a power source; 541. fixing a sleeve; 542. a tension spring; 543. and (5) extending the rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments that can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1 to 4, a specific apparatus of an embodiment of a gear induction hardening apparatus according to the present invention is shown, and the apparatus includes: the device comprises a lifting motor 1, a fixing plate 2, a fixing rod 3, a temperature sensor 4, a temperature adjusting assembly 5, a water tank 6, a heating assembly 7, a gear 8 and a lifting slide rail 9, wherein the lifting motor 1 is arranged above the center of the fixing plate 2, the lifting slide rail 9 is arranged below the center of the fixing plate 2, the lifting motor 1 and the lifting slide rail 9 are coaxial, the upper end surface of the lifting slide rail 9 is flush with the lower end surface of the lifting motor 1, the lower end of the lifting slide rail 9 is connected with the gear 8 through a key, the gear 8 is coaxial with the lifting slide rail 9, and a starfish-shaped induction coil 71 and a profiling induction coil 72 are arranged on the outer side of the gear 8; the upper side of the starfish-shaped induction coil 71 is provided with a profiling induction coil 72, and the starfish-shaped coil 71 and the profiling induction coil 72 are connected with a power supply 73; a plurality of groups of temperature adjusting assemblies 5 are arranged at the bottom corners of the profiling induction coils 72, temperature sensors 4 are arranged above the bottom corners of the profiling induction coils 72, the temperature sensors 4 are connected with the lower end faces of the fixing plates 2 through fixing rods 3, and water tanks 6 are arranged at the bottoms of the devices.
The temperature adjusting assembly 5 comprises a rotating motor 51 arranged at the edge of the upper end face of the fixing plate and a vertical slide rail 52 vertically arranged at the edge of the lower end face, the rotating motor 51 is coaxial with the vertical slide rail 52, the lower end face of the vertical slide rail 52 is connected with the upper end face of the water tank 6, and the upper end face of the vertical slide rail 52 is flush with the lower end face of the rotating motor 51; the vertical slide rail 52 is provided with a horizontal telescopic rod 54, one end of the horizontal telescopic rod 54 is movably connected with the vertical slide rail 52 through a slide block 53, the other end of the horizontal telescopic rod 54 is connected with the lower end of a first magnetizer fixing rod 55, the lower end of the first magnetizer fixing rod 55 is spherical and is tangent to the inner side of a vertical semicircular guide rail 58, the upper end of the semicircular guide rail 58 is connected with the lower end of a vertical guide rail fixing rod 59, the upper end surface of the vertical guide rail fixing rod 59 is flush with the lower end surface of the fixing plate 2, the upper end of the first magnetizer fixing rod 55 is provided with a U-shaped magnetizer 56, the U-shaped magnetizer 56 is placed at the bottom corner of the profiling induction coil 72, and the semicircular guide rail 58 and the magnetizer 56 are coaxial and coplanar.
The telescopic rod 54 comprises a fixed sleeve 541, the fixed sleeve 541 is connected with the slider 53, a telescopic spring 542 is arranged inside the fixed sleeve 541, one end, far away from the gear, of the telescopic spring 542 is connected with the slider 53, the other end of the telescopic spring 542 is connected with one end, far away from the gear, of the extension rod 543, and the other end of the extension rod 543 is connected with the lower end of the first magnetizer fixing rod 55; and the fixing sleeve 541 is coaxial with the extension spring 542 and the extension rod 543.
The U-shaped magnetizer 56 is semicircular at the inner side and can be beneficial to heating the magnetizer around the direction induction coil, the rectangular at the outer side is beneficial to being connected with the first magnetizer fixing rod, the edge of the lower end face of the outer side of the U-shaped magnetizer 56 is provided with the first magnetizer fixing rod 55, the U-shaped magnetizer 56 and the No. 2 magnetizer are fixed and integrated into a whole 57, the lower end of the first magnetizer fixing rod 55 is spherical and is tangent to the inside of the semicircular guide rail 58, the side of the semicircular guide rail 58, which is close to the vertical slide rail 52, is provided with a through groove, through up-and-down movement of the slide block, the magnetizer can be connected with the lower end of the first magnetizer fixing rod 55 through the groove by the rotary extension rod 543 of the profiling induction coil 72. A second magnetizer fixing rod 57 is arranged at the center of the outer end face of the U-shaped magnetizer 56, the outer end of the second magnetizer fixing rod 57 is tangent to the inner side of the semicircular guide rail 58, the extension lines of the first magnetizer fixing rod 55 and the second magnetizer fixing rod 57 both pass through the circle center of the semicircular guide rail 58, and the first magnetizer fixing rod 55 is vertical to the second magnetizer fixing rod 57.
Referring to fig. 5, a specific flow of the gear induction quenching process provided by the invention is provided, and the process specifically includes the following steps:
s1, setting multiple groups of heating parameters by the system: the temperature range (1000-50) DEG C to (1000+50) DEG C required by the gear 8 is 760 ℃ required by heating the tooth top for the first time.
S2, after the device is installed, electrifying the starfish-shaped induction coil 71, heating for the first time, recording the tooth profile temperature in real time by using the temperature sensor 4, and disconnecting the current of the starfish-shaped induction coil 71 if the temperature T of the tooth top reaches a system preset value of 760 ℃, namely T is more than or equal to 760 ℃; if the temperature T of the tooth top does not reach the preset system value, namely T is less than 760 ℃, continuing heating until T is more than or equal to 760 ℃.
And S3, electrifying the profiling induction coil 72, controlling the lifting motor 1 to lift the gear 8 at the same time, and heating for the second time to enable the lower end face of the gear 8 to be flush with the lower end face of the profiling induction coil 72.
S4, controlling the rotating motor 51 to make the slide block 53 drive the telescopic rod 54 to move up and down, the telescopic rod 54 moves up and down, because the sphere at the bottom of the first magnetizer fixing rod 5 is always at the semicircular guide rail 58, the telescopic rod 54 will extend and contract at the same time, making the spherical outer ends of the first magnetizer fixing rod 55 and the second magnetizer fixing rod 57 move along the semicircular guide rail 58, thereby making the U-shaped magnetizer 56 rotate around the tooth root of the profiling induction coil 72,
s5, uniformly heating the gear 8 by the device, wherein the specific process is as follows:
(1) see fig. 2, and real-time measuring the tooth top t by the temperature sensor 41And root of tooth t2The temperature of (2).
(2) When the tip temperature is greater than the root temperature, i.e. t1＞t2During the process, the U-shaped magnetizer 56 rotates towards the opening horizontal direction, and the magnetic field at the tooth root is converged by utilizing the action of magnetic gathering and drainage of the magnetizer, so that the temperature of the tooth root is increased while the induction heating efficiency of the magnetic field is improved.
(3) Referring to FIG. 5, when the tip temperature is lower than the root temperature, t1＜t2When the magnetic field is applied, the U-shaped magnetizer 56 rotates towards the direction with the opening facing downwards, and the magnetic field is converged downwards by utilizing the action of the magnetizer for concentrating magnetic flux and conducting current, so that the temperature rise of the tooth root is slowed down.
Heating until the temperature of the tooth top and the tooth root is in the set temperature range of the gear 8, namely the surface temperature (1000-50) DEG C is less than or equal to t less than or equal to (1000+50) DEG C, disconnecting the current of the profiling induction coil 72, and if the preset condition of the system is not met, repeating S4 until the temperature (1000-50) DEG C is less than or equal to t less than or equal to (1000+50) DEG C.
Under the condition that the influence of the skin effect and the tip effect is difficult to reduce, the uniformity of the surface temperature of the gear is ensured through twice heating of the induction coil, and the gear is uniformly heated.
And S6, lowering the gear 8 into the water tank through the lifting motor 1, quenching the gear 8 in the water tank 6, and cutting off the power supply of the lifting motor 1 after the gear 8 is quenched.
The principle and the implementation mode of the invention are explained by applying the specific embodiments, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. As a result of the observation: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (4)
1. The utility model provides a gear induction hardening device, its includes elevator motor, fixed plate, dead lever, temperature sensor, temperature regulation subassembly, basin, heating element and lift slide rail, its characterized in that:
the lifting motor and the lifting slide rail are respectively arranged above the center of the fixing plate and below the center of the fixing plate, the input end face of the lifting slide rail is flush with the output end face of the lifting motor, the gear is arranged at the lower end of the lifting slide rail, the axis of the lifting motor, the axis of the lifting slide rail and the axis of the gear are all coincided, a starfish-shaped induction coil and a profiling induction coil are arranged outside the gear, and the temperatures of the tooth top and the tooth root are respectively and rapidly increased;
the profiling induction coil is arranged on the upper side of the starfish-shaped induction coil, the starfish-shaped induction coil and the profiling induction coil are connected with a power supply, a plurality of groups of temperature adjusting assemblies are arranged at the bottom corner of the profiling induction coil, a temperature sensor is arranged above the bottom corner of the profiling induction coil, the temperature sensor is connected with the lower end face of the fixed plate through the fixed rod, and the water tank is arranged at the bottom of the device;
the temperature adjusting component comprises a rotating motor, a vertical sliding rail, a sliding block, a telescopic rod, a first magnetizer fixing rod, a U-shaped magnetizer, a second magnetizer fixing rod, a semicircular guide rail and a vertical guide rail fixing rod, the rotating motor is arranged on the fixing plate, the vertical sliding rail is coaxially connected with the rotating motor, the lower end surface of the telescopic rod is connected with the upper end surface of the water tank, the slide block and the vertical slide rail form a sliding pair, the two ends of the telescopic rod are respectively connected with the slide block and the first magnetizer fixing rod, the first end of the first magnetizer fixing rod and the first end of the second magnetizer fixing rod are both connected with the U-shaped magnetizer, the second end of the first magnetizer fixing rod and the second end of the second magnetizer fixing rod are both spherical, the second end of the first magnetizer fixing rod and the second end of the second magnetizer fixing rod are tangent to the inner side of the vertical semicircular guide rail to form a sliding pair;
the telescopic link includes fixed cover, expanding spring and extension rod, the both ends of fixed cover link to each other with slider, expanding spring's first end respectively, expanding spring's second end links to each other with the first end of extension rod, the second end of extension rod with the second end of first magnetizer dead lever links to each other, fixed cover, expanding spring, extension rod coaxial line.
2. The gear induction hardening apparatus according to claim 1, wherein: the upper end of the semicircular guide rail is connected with the lower end of the vertical guide rail fixing rod, the upper end face of the vertical guide rail fixing rod is flush with the lower end face of the fixing plate, the U-shaped magnetizer is placed at the bottom corner of the profiling induction coil, and the semicircular guide rail and the U-shaped magnetizer are coaxial and coplanar.
3. The gear induction hardening apparatus according to claim 1, wherein: the U-shaped magnetizer is semicircular at the inner side and rectangular at the outer side, extension lines of the first magnetizer fixing rod and the second magnetizer fixing rod penetrate through the circle center of the semicircular guide rail, and the first magnetizer fixing rod is perpendicular to the second magnetizer fixing rod.
4. An induction hardening process based on the gear induction hardening apparatus according to any one of claims 1 to 3, characterized in that: which comprises the following steps:
s1, setting multiple groups of heating parameters by the system: temperature T required for heating tooth top for the first time0Temperature interval t to which gear is required to reach0-Δt～t0+Δt；
S2, after the device is installed, the starfish induction coil is electrified to carry out primary heating, and the tooth profile temperature is measured by using the temperature sensorRecording the temperature in real time, and if the temperature T of the tooth top reaches the preset value T of the system0I.e. T.gtoreq.T0Then the current of the starfish induction coil is cut off; if the temperature T of the tooth top does not reach the preset value of the system, namely T is less than T0Then heating is continued until T ≧ T is satisfied0；
S3, electrifying the profiling induction coil, controlling the lifting motor to lift the gear at the same time, enabling the lower end face of the gear to be flush with the lower end face of the profiling induction coil, and heating for the second time;
s4, controlling a rotating motor to enable a sliding block to drive a telescopic rod to move up and down, and enabling the telescopic rod to stretch and retract while moving up and down, so that the spherical outer ends of a first magnetizer fixing rod and a second magnetizer fixing rod move along a semicircular guide rail, a U-shaped magnetizer rotates around a tooth root of the profiling induction coil, and the temperature rise of the tooth root is accelerated by changing the distribution of magnetic lines of force of the tooth root;
s5, measuring the tooth top t in real time by the temperature sensor1And root of tooth t2When the tip temperature is greater than the root temperature, i.e. t1＞t2When the magnetic field induction heating device is used, the U-shaped magnetizer rotates towards the opening horizontal direction, the magnetic fields at the tooth root are converged by utilizing the action of magnetism gathering and drainage of the magnetizer, the temperature rise of the tooth root is accelerated while the magnetic field induction heating efficiency is improved; when the tip temperature is lower than the root temperature, i.e. t1＜t2When the magnetic field is applied to the tooth root, the U-shaped magnetizer rotates towards the opening in the downward direction, and the magnetic field is converged downwards by utilizing the conduction effect of the magnetizer, so that the temperature rise of the tooth root is slowed down; until the temperature of the tooth top and the tooth root is in the set temperature range of the gear, namely the surface temperature t of the gear1-Δt≤t≤t1+ delta t, the current of the profiling induction coil is cut off, if the preset condition of the system is not met, the heating is continued until t is met1-Δt≤t≤t1+Δt；
And S6, lowering the gear into the water tank through the lifting motor, quenching the gear in the water tank, and cutting off the power supply of the lifting motor after the gear is quenched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432070.4A CN113186375A (en) | 2021-04-21 | 2021-04-21 | Gear induction quenching device and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432070.4A CN113186375A (en) | 2021-04-21 | 2021-04-21 | Gear induction quenching device and process |
Publications (1)
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| CN114058828A (en) * | 2021-12-29 | 2022-02-18 | 泰州北极星机械有限公司 | Gear production is with dress axle mechanism |
| CN114293006A (en) * | 2021-11-30 | 2022-04-08 | 宁波创跃园林工具有限公司 | High-frequency quenching system of high-carbon steel saw blade for pruner |
| CN115216598A (en) * | 2022-07-04 | 2022-10-21 | 燕山大学 | Induction heating device based on cam and heating method thereof |
| CN116751936A (en) * | 2023-05-18 | 2023-09-15 | 辽宁科技大学 | Device and method for dynamic heat treatment of workpiece |
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| CN114293006A (en) * | 2021-11-30 | 2022-04-08 | 宁波创跃园林工具有限公司 | High-frequency quenching system of high-carbon steel saw blade for pruner |
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| CN116751936B (en) * | 2023-05-18 | 2024-05-28 | 辽宁科技大学 | Device and method for dynamic heat treatment of workpiece |
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