CN112981081A - Double-frequency automatic induction heating device and method for spiral bevel gear - Google Patents
Double-frequency automatic induction heating device and method for spiral bevel gear Download PDFInfo
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- CN112981081A CN112981081A CN202110159779.1A CN202110159779A CN112981081A CN 112981081 A CN112981081 A CN 112981081A CN 202110159779 A CN202110159779 A CN 202110159779A CN 112981081 A CN112981081 A CN 112981081A
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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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- 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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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
A double-frequency automatic induction heating device and method for a spiral bevel gear belong to the technical field of heat treatment. The double-frequency automatic induction heating device for the spiral bevel gear comprises a supporting platform, a first induction heating device, a second induction heating device and a computer, wherein the supporting platform is provided with a stepped shaft and a screw rod lifting device, the lower part of the stepped shaft is connected with a first motor, the top of the stepped shaft is provided with an infrared temperature measuring device, a supporting turntable is sleeved outside the stepped shaft, the spiral bevel gear is placed above the supporting turntable, the screw rod lifting device is located below the supporting turntable, and the computer is respectively connected with the first induction heating device, the second induction heating device, the first motor, the screw rod lifting device and the infrared temperature measuring device. The double-frequency automatic induction heating device and the method for the spiral bevel gear automatically control the induction heating process based on computer control and infrared temperature measurement technology, realize accurate heating, and realize simultaneous hardening of the tooth top, the tooth profile and the tooth root of the spiral bevel gear.
Description
Technical Field
The invention relates to the technical field of heat treatment, in particular to a double-frequency automatic induction heating device and method for a spiral bevel gear.
Background
The spiral bevel gear is used as an important part in a mechanical transmission process, and is widely applied to the fields of aerospace, metallurgical equipment, ship industry and other industries due to the advantages of high transmission efficiency, stable transmission ratio, high bearing capacity, stable transmission, reliable work, compact structure, low noise and the like, and the contact fatigue strength and the wear resistance of the surface of the spiral bevel gear influence the normal service and the service life of the spiral bevel gear. The failure of the bevel helical gear pair is due in large part to fatigue failure, and therefore, the improvement of tooth surface strength, wear resistance and stress concentration reduction contribute to the improvement of gear quality and service life. The surface of the spiral bevel gear is heated by the electromagnetic induction technology, so that the spiral bevel gear has the characteristics of high speed, high efficiency and energy conservation, and meanwhile, because the tooth surface of the spiral bevel gear is complex, the tip effect exists in the traditional induction heating process, and the tooth top, the tooth profile and the tooth root are difficult to harden simultaneously.
The bevel gear is heated by utilizing the double-frequency current, so that the distribution uniformity of the hardened layer on the surface of the bevel gear after heat treatment can be effectively improved. The heating time and process of each frequency band of the existing asynchronous double-frequency induction heating method are difficult to accurately control and monitor, so that the heating effect is not ideal.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a double-frequency automatic induction heating device and a double-frequency automatic induction heating method for a spiral bevel gear.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a double-frequency automatic induction heating device for a spiral bevel gear comprises a supporting platform, a first induction heating device, a second induction heating device and a computer;
the supporting platform is provided with a stepped shaft and a lead screw lifting device; the lower part of the stepped shaft is connected with a first motor, the top of the stepped shaft is provided with an infrared temperature measuring device, a supporting turntable is sleeved outside the stepped shaft, and a spiral bevel gear is arranged above the supporting turntable; the screw rod lifting device is positioned below the supporting turntable and used for controlling the lifting of the supporting turntable;
the first induction heating device comprises a first induction heating power supply and a first disc-shaped induction heating coil connected with the first induction heating power supply, and the first disc-shaped induction heating coil is positioned above the supporting turntable; the second induction heating device comprises a second induction heating power supply and a second disc-shaped induction heating coil connected with the second induction heating power supply, and the second disc-shaped induction heating coil is positioned above the supporting turntable;
and the computer is respectively connected with the first induction heating device, the second induction heating device, the first motor, the lead screw lifting device and the infrared temperature measuring device.
Furthermore, the infrared temperature measuring device comprises a temperature measuring support fixedly arranged at the top of the stepped shaft and an infrared temperature measuring camera arranged on the temperature measuring support and opposite to the spiral bevel gear, and the infrared temperature measuring camera is connected with the computer in a wireless communication mode.
Further, lead screw elevating gear includes lead screw base, sets firmly in lead screw and the slide bar of lead screw base, the second motor of being connected with the lead screw lower extreme, sets up elevating platform on slide bar and lead screw and sets firmly the sleeve jacking frame on the elevating platform, the outside of step shaft is located to concentric and the cover of sleeve jacking frame and step shaft for drive supporting carousel reciprocates along the step shaft, the second motor is connected with the computer, and computer control second motor rotates, in order to realize reciprocating of sleeve jacking frame, the outside of second motor links firmly in supporting platform, in order to realize lead screw elevating gear's fixed.
Furthermore, the stepped shaft is connected with the supporting turntable through a sliding key, so that the first motor drives the supporting turntable to rotate circumferentially through the stepped shaft, and the screw rod lifting device drives the supporting turntable to move up and down along the stepped shaft.
Furthermore, the stepped shaft is fixedly arranged in the middle of the supporting platform and is connected with the supporting platform through a bearing.
Further, the output frequency of the first induction heating power supply is 0.5-10KHz, so as to realize medium-frequency induction heating; the output frequency of the second induction heating power supply is 20-100KHz, and the second induction heating power supply is used for realizing high-frequency induction heating.
Furthermore, a gear shaft frame is arranged above the supporting turntable, and a spiral bevel gear is placed on the gear shaft frame.
Furthermore, a plurality of supporting plates are arranged below the supporting platform and used for supporting the supporting platform.
Furthermore, the first motor is fixedly arranged on a supporting plate, and the output end of the first motor is connected with the stepped shaft through a conveying belt and used for driving the stepped shaft to rotate.
A double-frequency automatic induction heating method for a spiral bevel gear, which adopts the double-frequency automatic induction heating device for the spiral bevel gear, comprises the following steps:
s1, controlling a first motor to drive a stepped shaft to rotate by a computer, enabling a spiral bevel gear to reach the position right below a first disc-shaped induction heating coil, jacking a supporting turntable by a lead screw lifting device to enable the spiral bevel gear to be located inside the first disc-shaped induction heating coil, carrying out medium-frequency induction heating on the spiral bevel gear by the first disc-shaped induction heating coil, finishing heating after the medium-frequency induction heating reaches the set heating time, and lowering the supporting turntable by the lead screw lifting device;
s2, controlling a first motor to drive a stepped shaft to rotate by a computer, enabling a spiral bevel gear to reach the position right below a second disc-shaped induction heating coil, jacking a supporting turntable by a lead screw lifting device to enable the spiral bevel gear to be located inside the second disc-shaped induction heating coil, carrying out high-frequency induction heating on the spiral bevel gear by the second disc-shaped induction heating coil, finishing heating after the high-frequency induction heating reaches the set heating time, and lowering the supporting turntable by the lead screw lifting device;
s3, an infrared temperature measurement camera respectively takes a plurality of measuring points at the tooth top, the tooth profile and the tooth root of the spiral bevel gear for temperature acquisition, and the infrared temperature measurement camera acquires the measuring point T at the tooth top of the spiral bevel geara1,Ta2,……,TanCorresponding temperature value and measuring point T of spiral bevel gear tooth profilep1,Tp2,……,TpnCorresponding temperature value and measuring point T of tooth root of spiral bevel gearf1,Tf2,……,TfnCorresponding temperature values and transmitting the acquired temperature data to a computer;
s4, the computer calculates the temperature data collected by the infrared temperature measuring camera as follows:
calculating measuring point Ta1,Ta2,……,TanAverage value T of corresponding temperature valuesaMeasuring point Tp1,Tp2,……,TpnAverage value T of corresponding temperature valuespAnd a measuring point Tf1,Tf2,……,TfnAverage value T of corresponding temperature valuesf(ii) a Selecting Ta、TpAnd TfMaximum value of (1) as TmaxSelecting Ta、TpAnd TfMinimum value of (1) as TminCalculating the actual maximum temperature difference DeltaTFruit of Chinese wolfberry，ΔTFruit of Chinese wolfberry＝Tmax-Tmin；
S5, calculating the actual maximum temperature difference delta TFruit of Chinese wolfberryAnd comparing with the set maximum temperature difference standard Delta T:
(1) if Δ TFruit of Chinese wolfberryIf < Δ T, T is determineda、TpAnd TfWhether all are within the set temperature range, if T isa、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating; if T isa、TpAnd TfIs not within the set temperature range, the steps S1, S2, S3 and S4 are repeatedly performed until Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
(2) if Δ TFruit of Chinese wolfberryIf > Delta T, then respectively for TmaxAnd TminThe analysis was carried out:
if Tmax＝TaAnd Tmin＝TfThen, steps S1, S3, and S4 are repeatedly performed until Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
if Tmax＝TfAnd Tmin＝TaThen, steps S2, S3, and S4 are repeatedly performed until Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
if Tmax＝TpOr Tmin＝TpThen, the spiral bevel gear is left to stand for heat conduction, and the steps S3 and S4 are repeatedly executed until the Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfAnd finishing the double-frequency automatic induction heating within the set temperature range.
The invention has the beneficial effects that:
(1) the spiral bevel gear induction heating process is automatically controlled based on an infrared temperature measurement technology and a computer-aided control technology, and the whole process of the spiral bevel gear induction heating process is closed-loop controlled through linkage of a computer, a first motor, an infrared temperature measurement device, a lead screw lifting device, a first induction heating device and a second induction heating device;
(2) the invention realizes double-frequency asynchronous circulation heating for the medium-frequency and high-frequency double-frequency induction heating of the spiral bevel gear, and realizes high-precision and high-precision uniform heating by adjusting the maximum temperature difference standard and the medium-frequency and high-frequency induction heating time, thereby achieving better heating effect.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
Fig. 1 is a schematic diagram of the general structure of a dual-frequency automatic induction heating device for a spiral bevel gear according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a lead screw lifting device provided in an embodiment of the present invention;
FIG. 3 is a distribution diagram of measured points for the tooth tips, tooth profiles and tooth roots of a spiral bevel gear provided by an embodiment of the present invention;
fig. 4 is a flowchart of a dual-frequency automatic induction heating method for a spiral bevel gear according to an embodiment of the present invention.
Reference numerals in the drawings of the specification include:
1-a supporting platform, 2-a stepped shaft, 3-a supporting turntable, 4-a gear shaft bracket, 5-a spiral bevel gear, 6-a first disc-shaped induction heating coil, 7-a first induction heating power supply, 8-an infrared temperature measurement camera, 9-a temperature measurement bracket, 10-a second disc-shaped induction heating coil, 11-a sliding key, 12-a second induction heating power supply, 13-a supporting plate, 14-a first motor, 15-a computer, 16-a second motor, 17-a lead screw, 18-a sliding rod, 19-a lifting platform, 20-a lead screw base and 21-a sleeve lifting frame.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In order to solve the problems of the prior art, as shown in fig. 1 to 4, the present invention provides a dual-frequency automatic induction heating apparatus for a spiral bevel gear 5, comprising a support platform 1, a first induction heating apparatus, a second induction heating apparatus and a computer 15;
the supporting platform 1 is provided with a stepped shaft 2 and a lead screw lifting device; the lower part of the stepped shaft 2 is connected with a first motor 14, the top of the stepped shaft 2 is provided with an infrared temperature measuring device, a supporting turntable 3 is sleeved outside the stepped shaft 2, and a spiral bevel gear 5 is arranged above the supporting turntable 3; the screw rod lifting device is positioned below the supporting turntable 3 and used for controlling the lifting of the supporting turntable 3;
the first induction heating device comprises a first induction heating power supply 7 and a first disc-shaped induction heating coil 6 connected with the first induction heating power supply 7, and the first disc-shaped induction heating coil 6 is positioned above the supporting turntable 3; the second induction heating means comprises a second induction heating power supply 12 and a second disc-shaped induction heating coil 10 connected to the second induction heating power supply 12, the second disc-shaped induction heating coil 10 being located above the supporting turntable 3;
the computer 15 is respectively connected with the first induction heating device, the second induction heating device, the first motor 14, the lead screw lifting device and the infrared temperature measuring device. The computer 15 is respectively connected with the first induction heating device and the second induction heating device and is used for setting the output frequency and each heating time of the first induction heating power supply 7 and the output frequency and each heating time of the second induction heating power supply 12; the computer 15 is connected with the first motor 14, controls the rotation of the first motor 14, and moves the spiral bevel gear 5 to a set position through the stepped shaft 2 and the supporting turntable 3, such as moves the spiral bevel gear 5 to be directly below the first disc-shaped induction heating coil 6 or to be directly below the second disc-shaped induction heating coil 10; the computer 15 is connected with a second motor 16 of the screw rod lifting device, and the second motor 16 rotates to drive the sleeve jacking frame 21 to move up and down, so that the up and down movement of the supporting turntable 3 is realized; the computer 15 is connected with an infrared temperature measuring device, and the infrared temperature measuring device transmits the collected spiral bevel gear 5 to the computer 15.
As shown in figure 1, the infrared temperature measuring device comprises a temperature measuring support 9 fixedly arranged at the top of the stepped shaft 2 and an infrared temperature measuring camera 8 arranged on the temperature measuring support 9 and opposite to the spiral bevel gear 5, and the infrared temperature measuring camera 8 is connected with a computer 15 in a wireless communication mode. The stepped shaft 2 is connected with the supporting turntable 3 through the sliding key 11, so that the first motor 14 drives the supporting turntable 3 to rotate circumferentially through the stepped shaft 2, and the screw rod lifting device drives the supporting turntable 3 to move up and down along the stepped shaft 2. The stepped shaft 2 is fixedly arranged in the middle of the supporting platform 1 and is connected with the supporting platform 1 through a bearing. A gear shaft frame 4 is arranged above the supporting turntable 3, and a spiral bevel gear 5 is arranged on the gear shaft frame 4. A plurality of support plates 13 are arranged below the support platform 1 for supporting the support platform 1, and in this embodiment, four support plates 13 are arranged. First motor 14 sets firmly on a backup pad 13, and the output of first motor 14 passes through the conveyer belt with step shaft 2 and is connected for drive step shaft 2 rotates.
As shown in fig. 2, the screw lifting device includes a screw base 20, a screw 17 and a slide bar 18 fixed on the screw base 20, a second motor 16 connected to a lower end of the screw 17, a lifting platform 19 disposed on the slide bar 18 and the screw 17, and a sleeve lifting frame 21 fixed on the lifting platform 19, the sleeve lifting frame 21 is concentric with the stepped shaft 2 and sleeved outside the stepped shaft 2 to drive the supporting turntable 3 to move up and down along the stepped shaft 2, the second motor 16 is connected to the computer 15, the computer 15 controls the second motor 16 to rotate to realize the up and down movement of the sleeve lifting frame 21, and the outside of the second motor 16 is fixedly connected to the supporting platform 1 to fix the screw lifting device.
In the invention, the output frequency of the first induction heating power supply 7 is 0.5-10KHz, so as to realize medium-frequency induction heating; the output frequency of the second induction heating power supply 12 is 20-100KHz for realizing high-frequency induction heating. The first induction heating power supply 7 and the second induction heating power supply 12 are fixed on the ground.
In the invention, a computer 15 controls a first motor 14 to rotate, the first motor 14 drives a stepped shaft 2 to rotate through belt transmission to enable a spiral bevel gear 5 to move to the position right below a first disc-shaped induction heating coil 6, a lead screw lifting device lifts a supporting turntable 3 to enable the spiral bevel gear 5 to reach the interior of the first disc-shaped induction heating coil 6, the first disc-shaped induction heating coil 6 carries out precise medium-frequency induction heating on the spiral bevel gear 5 according to the heating time set by the computer 15, after the medium-frequency induction heating is finished, the computer 15 commands the lead screw lifting device to lower the supporting turntable 3 with the spiral bevel gear 5, then the computer 15 sends a rotation command to the first motor 14 to enable the spiral bevel gear 5 to rotate to the position right below a second disc-shaped induction heating coil 10, the lead screw lifting device lifts the supporting turntable 3 to enable the spiral bevel gear 5 to reach the interior of the second disc-shaped induction heating coil 10, the second disc-shaped induction heating coil 10 carries out accurate high-frequency induction heating on the spiral bevel gear 5 according to the heating time set by the computer 15, after the high-frequency induction heating is finished, the computer 15 commands the screw rod lifting device to lower the spiral bevel gear 5 and controls the first motor 14 to rotate to drive the spiral bevel gear 5 to a set position, the infrared temperature measuring device carries out temperature measurement on three parts of the tooth top, the tooth profile and the tooth root of the spiral bevel gear 5 and transmits the measured temperature data to the computer 15, and the computer 15 analyzes the temperature data and controls the double-frequency automatic induction heating device to work until the actual temperatures of the three parts of the tooth top, the tooth profile and the tooth root of the spiral bevel gear 5 reach a set temperature range simultaneously.
As shown in fig. 3 and 4, a dual frequency automatic induction heating method for a spiral bevel gear 5, using the above dual frequency automatic induction heating apparatus for a spiral bevel gear 5, comprises the steps of:
s1, the computer 15 controls the first motor 14 to drive the stepped shaft 2 to rotate, the spiral bevel gear 5 reaches the position right below the first disc-shaped induction heating coil 6, the lead screw lifting device lifts the supporting turntable 3 to enable the spiral bevel gear 5 to be located inside the first disc-shaped induction heating coil 6, the first disc-shaped induction heating coil 6 carries out medium-frequency induction heating on the spiral bevel gear 5, after the medium-frequency induction heating reaches the set heating time, the heating is finished, and the lead screw lifting device lowers the supporting turntable 3;
s2, the computer 15 controls the first motor 14 to drive the stepped shaft 2 to rotate, so that the spiral bevel gear 5 reaches the position right below the second disc-shaped induction heating coil 10, the lead screw lifting device lifts the supporting turntable 3 to enable the spiral bevel gear 5 to be located inside the second disc-shaped induction heating coil 10, the second disc-shaped induction heating coil 10 carries out high-frequency induction heating on the spiral bevel gear 5, after the high-frequency induction heating reaches the set heating time, the heating is finished, and the lead screw lifting device lowers the supporting turntable 3;
s3, the infrared temperature measurement camera 8 respectively takes a plurality of measuring points for temperature collection of the tooth top, the tooth profile and the tooth root of the spiral bevel gear 5, and the infrared temperature measurement camera 8 collects the measuring point T of the tooth top of the spiral bevel gear 5a1,Ta2,……,TanCorresponding temperature value and measuring point T of tooth profile of spiral bevel gear 5p1,Tp2,……,TpnCorresponding temperature value and measuring point T of tooth root of spiral bevel gear 5f1,Tf2,……,TfnCorresponding temperature values and transmitting the acquired temperature data to the computer 15;
s4, the computer 15 calculates the temperature data collected by the infrared temperature measurement camera 8 as follows:
calculating measuring point Ta1,Ta2,……,TanAverage value T of corresponding temperature valuesaMeasuring point Tp1,Tp2,……,TpnAverage value T of corresponding temperature valuespAnd a measuring point Tf1,Tf2,……,TfnAverage value T of corresponding temperature valuesf(ii) a Selecting Ta、TpAnd TfMaximum value of (1) as TmaxSelecting Ta、TpAnd TfMinimum value of (1) as TminCalculating the actual maximum temperature difference DeltaTFruit of Chinese wolfberry，ΔTFruit of Chinese wolfberry＝Tmax-Tmin；
S5, calculating the actual maximum temperature difference delta TFruit of Chinese wolfberryAnd comparing with the set maximum temperature difference standard Delta T:
(1) if Δ TFruit of Chinese wolfberryIf < Δ T, T is determineda、TpAnd TfWhether all are within the set temperature range, if T isa、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating; if T isa、TpAnd TfIs not within the set temperature range, the steps S1, S2, S3 and S4 are repeatedly performed until Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
(2) if Δ TFruit of Chinese wolfberryIf > Delta T, then respectively for TmaxAnd TminThe analysis was carried out:
if Tmax＝TaAnd Tmin＝TfThen, steps S1, S3, and S4 are repeatedly performed until Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
if Tmax＝TfAnd Tmin＝TaThen, steps S2, S3, and S4 are repeatedly performed until Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
if Tmax＝TpOr Tmin＝TpThen, the spiral bevel gear 5 is left to stand for heat conduction, and steps S3 and S4 are repeated until Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfAnd finishing the double-frequency automatic induction heating within the set temperature range.
Examples
A dual frequency auto-induction heating method for a spiral bevel gear 5, comprising the steps of:
s1, initially, the spiral bevel gear 5, the first disc-shaped induction heating coil 6 and the second disc-shaped induction heating coil 10 are uniformly distributed above the supporting turntable 3 at 120 °, and the computer 15 controls the first motor 14 to drive the stepped shaft 2 to rotate counter-clockwise by 120 ° so that the spiral bevel gear 5 reaches right below the first disc-shaped induction heating coil 6; the computer 15 controls the second motor 16 of the screw rod lifting device to rotate, drives the sleeve jacking frame 21 to move upwards, further drives the supporting turntable 3 to move upwards along the stepped shaft 2, and enables the spiral bevel gear 5 to be embedded into the first disc-shaped induction heating coil 6; the computer 15 controls the first disc-shaped induction heating coil 6 to perform medium-frequency induction heating on the spiral bevel gear 5, and the medium-frequency induction heating is performed until the set heating time delta t1After that, the medium-frequency induction heating is finished, and the computer 15 commands the second motor 16 of the lead screw lifting device to rotate reversely to lower the supporting turntable 3 and the spiral bevel gear 5; in the present embodiment, the set heating time Δ t for the first disc-shaped induction heating coil 6 to perform the intermediate frequency induction heating1The output frequency of the first induction heating power supply 7 is 2s, and 8 kHZ;
s2, the computer 15 sends a command of clockwise forward rotation 240 ° to the first motor 14, so that the spiral bevel gear 5 on the supporting turntable 3 reaches the position right below the second disc-shaped induction heating coil 10; the computer 15 controls the second motor 16 of the screw rod lifting device to rotate, drives the sleeve jacking frame 21 to move upwards, further drives the supporting turntable 3 to move upwards along the stepped shaft 2, and enables the spiral bevel gear 5 to be embedded into the second disc-shaped induction heating coil 10; the computer 15 controls the second disc-shaped induction heating coil 10 to perform high-frequency induction heating of the spiral bevel gear 5 to a set heating time deltat2After the high-frequency induction heating is finished, the computer 15 commands the second motor 16 of the lead screw lifting device to rotate reversely to lower the supporting turntable 3 and the spiral bevel gear 5, and then the computer 15 sends a command of rotating 120 degrees anticlockwise to the first motor 14 to prepare for monitoring the temperature of the spiral bevel gear 5 by the infrared temperature measuring device; in the present embodiment, the set heating time Δ t for the second disc-shaped induction heating coil 10 to perform high-frequency induction heating20.5s, and the output frequency of the second induction heating power supply 12 is 100 kHZ.
S3, the infrared temperature measurement camera 8 respectively takes 30 measuring points for temperature collection of the tooth top, the tooth profile and the tooth root of the spiral bevel gear 5, and the infrared temperature measurement camera 8 collects the measuring point T of the tooth top of the spiral bevel gear 5a1,Ta2,……,Ta30Corresponding temperature value and measuring point T of tooth profile of spiral bevel gear 5p1,Tp2,……,Tp30Corresponding temperature value and measuring point T of tooth root of spiral bevel gear 5f1,Tf2,……,Tf30Corresponding temperature values and transmitting the acquired temperature data to the computer 15;
s4, the computer 15 calculates the temperature data collected by the infrared temperature measurement camera 8 as follows:
calculating measuring point Ta1,Ta2,……,Ta30Average value T of corresponding temperature valuesaMeasuring point Tp1,Tp2,……,Tp30Average value T of corresponding temperature valuespAnd a measuring point Tf1,Tf2,……,Tf30Average value T of corresponding temperature valuesfNamely, calculating the average value T of the temperature values of 30 measuring points at the tooth top of the spiral bevel gear 5aAverage value T of temperature values of 30 measuring points of tooth profile of spiral bevel gear 5pAnd the average value T of the temperature values of 30 measuring points at the tooth root of the spiral bevel gear 5f(ii) a Selecting Ta、TpAnd TfMaximum value of (1) as Tmax，Tmax＝max{Ta,Tp,TfSelecting Ta、TpAnd TfMinimum value of (1) as Tmin，Tmin＝min{Ta,Tp,Tf}, calculating the actual maximum temperature difference DeltaTFruit of Chinese wolfberry，ΔTFruit of Chinese wolfberry＝Tmax-Tmin；
S5, calculating the actual maximum temperature difference delta TFruit of Chinese wolfberryIn comparison with the set maximum temperature difference criterion Δ T, in this embodiment, the maximum temperature difference criterion Δ T is 25 ℃:
(1) if Δ TFruit of Chinese wolfberryIf < Δ T, T is determineda、TpAnd TfWhether all the temperature is within the set temperature range, in the embodiment, the set temperature range is 975-1000 ℃, if T isa、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating; if T isa、TpAnd TfIs not within the set temperature range, the steps S1, S2, S3 and S4 are repeatedly executed, and the actual maximum temperature difference DeltaT is calculatedFruit of Chinese wolfberryComparing with the set maximum temperature difference standard delta T until Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
(2) if Δ TFruit of Chinese wolfberryIf > Delta T, then respectively for TmaxAnd TminThe analysis was carried out:
if Tmax＝TaAnd Tmin＝TfThen, steps S1, S3 and S4 are repeatedly performed, and the actual maximum temperature difference Δ T is calculatedFruit of Chinese wolfberryComparing with the set maximum temperature difference standard delta T until the delta T is satisfiedFruit of Chinese wolfberry< Δ T, and then T is determineda、TpAnd TfWhether all are at the set temperatureIn the range up to Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
if Tmax＝TfAnd Tmin＝TaThen, steps S2, S3 and S4 are repeatedly performed, and the actual maximum temperature difference Δ T is calculatedFruit of Chinese wolfberryComparing with the set maximum temperature difference standard delta T until the delta T is satisfiedFruit of Chinese wolfberry< Δ T, and then T is determineda、TpAnd TfWhether all are within the set temperature range until Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
if Tmax＝TpOr Tmin＝TpThen, the spiral bevel gear 5 is left to stand for heat conduction, the steps S3 and S4 are repeated, and the actual maximum temperature difference DeltaT is calculatedFruit of Chinese wolfberryComparing with the set maximum temperature difference standard delta T until the delta T is satisfiedFruit of Chinese wolfberry< Δ T, and then T is determineda、TpAnd TfWhether all are within the set temperature range until Ta、TpAnd TfAnd finishing the double-frequency automatic induction heating within the set temperature range.
In the double-frequency automatic induction heating method, after the screw lifting device in the step S1 or S2 lowers the supporting turntable 3, when the temperature of the spiral bevel gear 5 needs to be collected, the computer 15 controls the first motor 14 to drive the stepped shaft 2 to rotate, so that the spiral bevel gear 5 is moved away from the position right below the first disc-shaped induction heating coil 6 or the second disc-shaped induction heating coil 10, and the temperature measurement of the infrared temperature measuring device is facilitated.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A double-frequency automatic induction heating device for a spiral bevel gear is characterized by comprising a supporting platform, a first induction heating device, a second induction heating device and a computer;
the supporting platform is provided with a stepped shaft and a lead screw lifting device; the lower part of the stepped shaft is connected with a first motor, the top of the stepped shaft is provided with an infrared temperature measuring device, a supporting turntable is sleeved outside the stepped shaft, and a spiral bevel gear is arranged above the supporting turntable; the lead screw lifting device is positioned below the supporting turntable;
the first induction heating device comprises a first induction heating power supply and a first disc-shaped induction heating coil connected with the first induction heating power supply, and the first disc-shaped induction heating coil is positioned above the supporting turntable; the second induction heating device comprises a second induction heating power supply and a second disc-shaped induction heating coil connected with the second induction heating power supply, and the second disc-shaped induction heating coil is positioned above the supporting turntable;
and the computer is respectively connected with the first induction heating device, the second induction heating device, the first motor, the lead screw lifting device and the infrared temperature measuring device.
2. The dual-frequency automatic induction heating device for the spiral bevel gear according to claim 1, wherein the infrared temperature measuring device comprises a temperature measuring bracket fixedly arranged at the top of the stepped shaft and an infrared temperature measuring camera arranged on the temperature measuring bracket and facing the spiral bevel gear, and the infrared temperature measuring camera is connected with a computer in a wireless communication manner.
3. The dual-band automatic induction heating device for the spiral bevel gear according to claim 1, wherein the lead screw lifting device comprises a lead screw base, a lead screw and a slide rod which are fixedly arranged on the lead screw base, a second motor which is connected with the lower end of the lead screw, a lifting platform which is arranged on the slide rod and the lead screw, and a sleeve lifting frame which is fixedly arranged on the lifting platform, the sleeve lifting frame is concentric with the stepped shaft and is sleeved outside the stepped shaft to drive the supporting turntable to move up and down along the stepped shaft, and the second motor is connected with the computer.
4. The dual frequency automatic induction heating apparatus for a spiral bevel gear according to any one of claims 1 to 3, wherein the stepped shaft is connected with the supporting turntable by a sliding key.
5. The dual frequency automatic induction heating apparatus for a spiral bevel gear according to any one of claims 1 to 3, wherein the stepped shaft is fixedly installed at a middle portion of the support platform and is connected with the support platform through a bearing.
6. The dual frequency automatic induction heating apparatus for a spiral bevel gear according to any one of claims 1 to 3, wherein the output frequency of the first induction heating power source is 0.5 to 10KHz for realizing the medium frequency induction heating; the output frequency of the second induction heating power supply is 20-100KHz, and the second induction heating power supply is used for realizing high-frequency induction heating.
7. The dual frequency automatic induction heating device for a spiral bevel gear according to any one of claims 1 to 3, wherein a gear shaft bracket is provided above the supporting turntable, and the spiral bevel gear is placed on the gear shaft bracket.
8. The dual frequency automatic induction heating apparatus for a spiral bevel gear according to any one of claims 1 to 3, wherein a plurality of support plates are provided under the support platform.
9. The dual-band automatic induction heating apparatus for a spiral bevel gear according to claim 8, wherein said first motor is fixed to a support plate, and an output end of said first motor is connected to the step shaft through a belt for rotating the step shaft.
10. A dual frequency auto-induction heating method for a spiral bevel gear using the dual frequency auto-induction heating apparatus for a spiral bevel gear according to claim 1, comprising the steps of:
s1, controlling a first motor to drive a stepped shaft to rotate by a computer, enabling a spiral bevel gear to reach the position right below a first disc-shaped induction heating coil, jacking a supporting turntable by a lead screw lifting device to enable the spiral bevel gear to be located inside the first disc-shaped induction heating coil, carrying out medium-frequency induction heating on the spiral bevel gear by the first disc-shaped induction heating coil, finishing heating after the medium-frequency induction heating reaches the set heating time, and lowering the supporting turntable by the lead screw lifting device;
s2, controlling a first motor to drive a stepped shaft to rotate by a computer, enabling a spiral bevel gear to reach the position right below a second disc-shaped induction heating coil, jacking a supporting turntable by a lead screw lifting device to enable the spiral bevel gear to be located inside the second disc-shaped induction heating coil, carrying out high-frequency induction heating on the spiral bevel gear by the second disc-shaped induction heating coil, finishing heating after the high-frequency induction heating reaches the set heating time, and lowering the supporting turntable by the lead screw lifting device;
s3, an infrared temperature measurement camera respectively takes a plurality of measuring points at the tooth top, the tooth profile and the tooth root of the spiral bevel gear for temperature acquisition, and the infrared temperature measurement camera acquires the measuring point T at the tooth top of the spiral bevel geara1,Ta2,……,TanCorresponding temperature value and measuring point T of spiral bevel gear tooth profilep1,Tp2,……,TpnCorresponding temperature value and measuring point T of tooth root of spiral bevel gearf1,Tf2,……,TfnCorresponding temperature values and transmitting the acquired temperature data to a computer;
s4, the computer calculates the temperature data collected by the infrared temperature measuring camera as follows:
calculating measuring point Ta1,Ta2,……,TanAverage value T of corresponding temperature valuesaMeasuring point Tp1,Tp2,……,TpnAverage value T of corresponding temperature valuespAnd a measuring point Tf1,Tf2,……,TfnAverage value T of corresponding temperature valuesf(ii) a Selecting Ta、TpAnd TfMaximum value of (1) as TmaxSelecting Ta、TpAnd TfMinimum value of (1) as TminCalculating the actual maximum temperature difference DeltaTFruit of Chinese wolfberry，ΔTFruit of Chinese wolfberry＝Tmax-Tmin；
S5, calculating the actual maximum temperature difference delta TFruit of Chinese wolfberryAnd comparing with the set maximum temperature difference standard Delta T:
(1) if Δ TFruit of Chinese wolfberryIf < Δ T, T is determineda、TpAnd TfWhether all are within the set temperature range, if T isa、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating; if T isa、TpAnd TfIs not within the set temperature range, the steps S1, S2, S3 and S4 are repeatedly performed until Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
(2) if Δ TFruit of Chinese wolfberryIf > Delta T, then respectively for TmaxAnd TminThe analysis was carried out:
if Tmax＝TaAnd Tmin＝TfThen, steps S1, S3, and S4 are repeatedly performed until Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
if Tmax＝TfAnd Tmin＝TaThen, steps S2, S3, and S4 are repeatedly performed until Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfWithin the set temperature range, finishing the double-frequency automatic induction heating;
if Tmax＝TpOr Tmin＝TpThen, the spiral bevel gear is left to stand for heat conduction, and the steps S3 and S4 are repeatedly executed until the Δ T is satisfiedFruit of Chinese wolfberry< Δ T and Ta、TpAnd TfAnd finishing the double-frequency automatic induction heating within the set temperature range.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| CN109825694A (en) * | 2019-03-15 | 2019-05-31 | 燕山大学 | Layer-by-layer formula heating device and its method for cylindric spiral gear |
| CN210202119U (en) * | 2019-03-27 | 2020-03-27 | 燕山大学 | Experimental device for be used for bevel gear dual-frenquency induction heating |
| CN111424158A (en) * | 2020-03-26 | 2020-07-17 | 燕山大学 | Control method for heating weather-resistant steel gear |
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| CN109825694A (en) * | 2019-03-15 | 2019-05-31 | 燕山大学 | Layer-by-layer formula heating device and its method for cylindric spiral gear |
| CN210202119U (en) * | 2019-03-27 | 2020-03-27 | 燕山大学 | Experimental device for be used for bevel gear dual-frenquency induction heating |
| CN111424158A (en) * | 2020-03-26 | 2020-07-17 | 燕山大学 | Control method for heating weather-resistant steel gear |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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