CN113637824B - High-frequency induction heating heat treatment device for blades in mixing drum and implementation method thereof - Google Patents

High-frequency induction heating heat treatment device for blades in mixing drum and implementation method thereof Download PDF

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CN113637824B
CN113637824B CN202110907946.6A CN202110907946A CN113637824B CN 113637824 B CN113637824 B CN 113637824B CN 202110907946 A CN202110907946 A CN 202110907946A CN 113637824 B CN113637824 B CN 113637824B
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mixing drum
heat treatment
cooling liquid
frequency coil
spray head
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CN113637824A (en
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姜胜强
何泽华
邱坤
曹国栋
谭援强
刘金刚
刘思思
杨世平
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Xiangtan University
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Xiangtan University
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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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a high-frequency induction heating heat treatment device for blades in a mixing drum and an implementation method thereof. The device mainly comprises a mixing drum supporting module, a driving module, a heating and cooling module, a mixing drum and a control module. In the working process, the control module operates the control program to adjust the rotating speeds of the variable frequency motor, the first stepping motor and the second stepping motor, so that the high-frequency coil and the cooling liquid spray head move along the motion trail of the stirring blade all the time when the stirring drum rotates, and the purpose of carrying out quenching heat treatment on the top of the spiral stirring blade welded in the drum is further achieved. The invention has low design cost and simple and convenient operation, improves the wear resistance of the stirring blade, and solves the problem of blade cracking in the welding process of the stirring blade after heat treatment.

Description

High-frequency induction heating heat treatment device for blades in mixing drum and implementation method thereof
Technical Field
The invention relates to the field of concrete mixing and transporting devices, in particular to a heat treatment device for a blade of a mixing drum.
Background
With the acceleration of the construction process of national infrastructure and the popularization and popularity of commercial concrete in big and medium cities in China, a large amount of commercial concrete manufacturing and transporting equipment is rapidly developed. The concrete mixer truck has the advantages of convenience in operation, high efficiency, simplicity in maintenance, strong trafficability characteristic, capability of entering construction sites with various severe conditions and the like, thereby becoming a main engineering machine in the concrete transportation process.
The concrete mixing drum is used as a key part of the concrete mixing truck, and the mixing blades contained in the concrete mixing drum play a decisive role in the service performance of the concrete mixing drum. After the mixing drum is used for a period of time in the actual production process, the top end of the mixing blade in the mixing drum is seriously abraded, so that the mixing blade is deformed, the top end of the mixing blade is thinned and even cracked, and then the mixing uniformity of concrete is reduced, the feeding and discharging speed of the mixing blade is slowed down, the use and maintenance cost is increased, and the working efficiency and the reliability of the whole vehicle are reduced.
Most for changing blade shape or structure in order to reach the wear-resisting purpose in promotion blade top among the prior patent, nevertheless this will make stirring vane structure or shape complicated, the condition that constructor is difficult to install and processing difficulty appears in the production reality.
In summary, the problem to be solved by those skilled in the art is how to provide a method and apparatus for improving the wear resistance of the tip of the mixing blade of a concrete mixing drum, which is efficient in production and simple in operation.
Disclosure of Invention
In order to solve the above problems, the present invention provides a high-frequency induction heating heat treatment apparatus for a blade in a mixer drum and a method for performing the same, which heat-treats the tip of the blade welded to the mixer drum. The wear resistance of the mixing drum blade is improved through heat treatment, and the purpose of prolonging the service life of the concrete mixing drum is achieved.
The technical scheme of the invention is as follows: a high-frequency induction heating heat treatment device for blades in a mixing drum and an implementation method thereof are characterized in that: the device comprises a mixing drum supporting module (1), a driving module (2), a heating and cooling module (3), a mixing drum (4) and a control module (5);
furthermore, the mixing drum supporting module (1) comprises a supporting frame (11), a limiting mechanism (12) and a rotating mechanism (13); the supporting frame (11) comprises square steel (111), a supporting frame base (112), a ground mat (113) and a bearing seat mounting plate (114); the limiting mechanism (12) comprises a first steering wheel (121) and a disc flange device (122). The first steering wheel is connected with the supporting frame (11) through a bolt, and the disc flange device is installed on the supporting frame (11) through welding and used for fixing the stirring cylinder (4) in the axial direction; the swing mechanism (13) comprises a vertical bearing seat (131), a rotating shaft (132), a rubber coating roller (133), a transition chain wheel (134), a driving chain wheel (135) and a driven belt wheel (136). The vertical bearing seat (131) is installed on the bearing seat installation plate (114) through screws, the rubber coating roller (133) is installed on the rotating shaft (132) through welding, and the transition chain wheel (134), the driving chain wheel (135) and the driven belt wheel (136) are connected with the shaft in a key connection mode and used for realizing synchronous rotation of the two rotating shafts (132) so as to drive the stirring drum to rotate;
furthermore, the driving module (2) comprises a speed reducer rack (21), a speed reducer (22), a quincunx elastic coupling (23) and a variable frequency motor (24). The speed reducer (22), the variable frequency motor (24) and the speed reducer rack (21) are all connected through bolts; the driving module (2) transmits power to the rotating mechanism (13) through belt transmission to drive the mixing drum to rotate;
further, the heating and cooling module (3) comprises a walking device (31), a walking track (32), a power sliding table (33), a water tank (34) and a gas cylinder (35); the walking device (31) comprises a walking frame (311), a second directional wheel (312), a guide rail fixing seat (313) and a guide rail (314); the power sliding table (33) comprises a sliding table (331), a sliding rail (332), a first stepping motor (333), a second stepping motor (334), a high-frequency coil (335), a clamping lug (336) and a cooling liquid spray head (337); the high-frequency coil (335) and the cooling liquid spray head (337) are fixed on two sides of the bottom end of the sliding rail through clamping lugs (336), and a first stepping motor (333) and a second stepping motor (334) are mounted on the sliding table (331) through screws and are respectively used for driving the sliding table to move horizontally on the guide rail (314) and driving the sliding rail (332) to descend or ascend;
the control module (5) comprises a microcomputer system, an ammeter arranged in a heating circuit, and a flow sensor and an electromagnetic valve which are arranged in a cooling liquid pipeline; the current in the heating circuit is collected through an ammeter, the current is converted into the heating temperature of the high-frequency coil (335), and the heating temperature is compared with the target heat treatment temperature, so that the current in the heating circuit is adjusted to realize the control of the heat treatment temperature; the speed sensors arranged on the variable frequency motor (24), the first stepping motor (333) and the second stepping motor (334) send collected speed data to the control module (5), and the control module (5) compares the collected speed with a target speed generated by a control program and adjusts the rotating speed of each motor in real time.
Further, the implementation method of the high-frequency induction heating heat treatment of the blades in the mixing drum comprises the following steps:
s1, setting a heat treatment starting point: after the mixing drum (4) is placed on the rotating mechanism (13), the rotation of the mixing drum (4) and the movement of the sliding table (331) and the sliding rail (332) are manually controlled, so that the high-frequency coil (335) and the cooling liquid spray head (337) are positioned at the starting position of the spiral blade at the rear conical section of the mixing drum (4), and the positions of the high-frequency coil and the cooling liquid spray head are set as the starting point of the heat treatment process;
s2, inputting characteristic parameters of the mixing drum and generating a control program: the height B of the blade, the diameter D of the cylinder and the small diameter D of the rear cone which are input into the mixing drum (4) to be heat treated 1 Front taper minor diameter d 2 Rear cone width L 1 Front cone width L 2 The width H of the cylindrical section and the back cone helical angle beta 1 Cylindrical segment helix angle beta 2 Front cone section helix angle beta 3 The software in the control module (5) calculates the motion track of the helical blade according to the input parameters and decomposes the motion track along the axial direction and the radial direction of the mixing drum (4) so as to determine the displacement and the speed of the high-frequency coil (335) and the cooling liquid spray head (337) along the axial direction and the radial direction of the mixing drum (4) in the heat treatment process and generate a control program;
s3, operating a program to perform heat treatment: a first stepping motor (333) drives the sliding table (331) to move on the guide rail (314) so as to drive the high-frequency coil (335) and the cooling liquid spray head (337) to move along the axial direction of the stirring drum (4); the second stepping motor (334) drives the slide rail (332) to move downwards or upwards on the sliding table (331) relative to the sliding table (331) so as to drive the high-frequency coil (335) and the cooling liquid spray head (337) to move along the radial direction of the mixing drum (4).
Further, when the area to be heat treated of the blade is subjected to heat treatment, the dwell time of the high-frequency coil (335) in the heating area is longer than the time for heating the area to be fully austenitized; after the heating of the heat treatment area is finished, the area moves to the position below a cooling liquid spray head (337) along with the rotation of the mixing drum, and cooling liquid is sprayed on the heated area to improve the cooling speed; the residence time of the cooling liquid spray head (337) in the heating area is determined by the rotation speed of the mixing drum (4);
furthermore, in the working process, the control module (5) adjusts the rotating speed of the variable frequency motor (24) through operating a control program so as to control the rotating speed of the mixing drum (4); the control module (5) adjusts the rotating speed and the rotating number of turns of the first stepping motor (333) through running a control program to control the moving state of the high-frequency coil (335) and the cooling liquid spray head (337) along the axial direction of the mixing drum (4), and adjusts the rotating speed and the rotating number of turns of the second stepping motor (334) to control the moving state of the high-frequency coil (335) and the cooling liquid spray head (337) along the radial direction of the mixing drum (4); in the heat treatment process, the high-frequency coil (335) and the cooling liquid spray head (337) always move along the track of the blade of the mixing drum and keep a certain distance from the top of the blade.
Preferably, the supporting frame base (112) and the ground mat (113) form a leveling mechanism, after the ground mat (113) is fixed on the ground by using foundation bolts, adjusting screws are screwed into a horizontal adjusting screw hole group on the supporting frame base (112), and the horizontal adjustment of the supporting frame (11) can be realized by controlling the screwing depth of the adjusting screws.
Preferably, the rubber coated on the outer layer of the rubber coated roller (133) has certain flexibility and anti-skid texture, so that the friction force between the rubber coated roller (133) and the stirring cylinder (4) is increased, and the phenomenon of skidding is avoided during starting. The disc flange in the disc flange device (122) is also coated with rubber so as to avoid scratching the surface of the mixing drum in the use process.
The invention has the beneficial effects that: a high-frequency induction heating heat treatment device for blades in a mixing drum and an implementation method thereof are used for carrying out a heat treatment process on helical blades welded on the mixing drum, so that the wear resistance of the blades of the mixing drum is improved, and the purpose of prolonging the service life of a concrete mixing drum is achieved.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic structural view of the support module.
Fig. 3 is a schematic structural diagram of a driving module.
Fig. 4 is a schematic structural view of a heating and cooling module.
Fig. 5 and fig. six are schematic views of the guide rail fixing seat and the power sliding table
In the figure: 1-support module, 2-drive module, 3-heating and cooling module, 4-mixing drum, 11-support, 12-limit mechanism, 13-rotation mechanism, 111-square steel, 112-support base, 113-ground mat, 114-bearing block mounting plate, 121-first directional wheel, 122-disc flange device, 131-vertical bearing block, 132-rotation shaft, 133-rubber-coated roller, 134-transition sprocket, 135-driving sprocket, 136-driven pulley, 21-speed reducer rack, 22-speed reducer, 23-quincunx elastic coupling, 24-variable frequency motor, 31-walking device, 32-walking track, 33-power slide table, 34-water tank, 311-walking rack, 312-second directional wheel, 313-guide rail fixing seat, 314-guide rail, 331-power slide table, 332-slide rail, 333-first step motor, 334-second step motor, 335-high frequency coil, 336-clamp lug, 337-cooling liquid spray head
Detailed description of the preferred embodiments
The specific implementation mode is as follows:
the technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product.
The invention provides a high-frequency induction heating heat treatment device for blades in a mixing drum and an implementation method thereof, and the high-frequency induction heating heat treatment device is characterized in that: the device comprises a mixing drum supporting module 1, a driving module 2, a heating and cooling module 3, a mixing drum 4 and a control module 5;
the mixing drum supporting module 1 comprises a supporting frame 11, a limiting mechanism 12 and a rotating mechanism 13; the support frame 11 comprises square steel 111, a support frame base 112, a ground mat 113 and a bearing seat mounting plate 114; the limiting mechanism 12 comprises a first steering wheel 121 and a disc flange device 122; the first steering wheel is connected with the supporting frame 11 through a bolt, and the disc flange device is installed on the supporting frame 11 through welding and used for fixing the stirring cylinder 4 in the axial direction; the swing mechanism 13 comprises a vertical bearing seat 131, a rotating shaft 132, a rubber coating roller 133, a transition chain wheel 134, a driving chain wheel 135 and a driven belt wheel 136; the vertical bearing seat 131 is installed on the bearing seat installation plate 114 through a screw, the rubber coating roller 133 is installed on the rotating shaft 132 through welding, and the transition chain wheel 134, the driving chain wheel 135 and the driven belt wheel 136 are connected with the shaft through key connection and are used for realizing synchronous rotation of the two rotating shafts 132 so as to drive the mixing drum to rotate;
the driving module 2 comprises a speed reducer rack 21, a speed reducer 22, a quincunx elastic coupling 23 and a variable frequency motor 24; the speed reducer 22, the motor 23 and the speed reducer rack 21 are all in bolted connection; the driving module 2 transmits power to the rotating mechanism 13 through belt transmission to drive the mixing drum to rotate;
the heating and cooling module 3 comprises a walking device 31, a walking track 32, a power sliding table 33 and a water tank 34; the walking device 31 comprises a walking frame 311, a second directional wheel 312, a guide rail fixing seat 313 and a guide rail 314; the power sliding table 33 comprises a sliding table 331, a sliding rail 332, a first stepping motor 333, a second stepping motor 334, a high-frequency coil 335, a clamping lug 336 and a cooling liquid spray head 337; the cooling liquid spray head 337 and the high-frequency coil 335 are fixed on two sides of the bottom end of the slide rail 332 through clamping lugs 336 and are separated by a certain distance; the first stepping motor 333 and the second stepping motor 334 are mounted on the sliding table 331 through screws, and are respectively used for driving the sliding table 331 to translate on the guide rail 314 and driving the sliding rail 332 to descend and ascend relative to the sliding table 331;
the control module 5 comprises a microcomputer system, an ammeter arranged in the heating circuit, a flow sensor arranged in the cooling liquid pipeline and an electromagnetic valve; the current in the heating circuit is collected through an ammeter, the current is converted into the heating temperature of the high-frequency coil 335, and the heating temperature is compared with the target heat treatment temperature, so that the current in the heating circuit is adjusted to control the heat treatment temperature; the speed sensors installed on the variable frequency motor 24, the first stepping motor 333 and the second stepping motor 334 send the acquired speed data to the control module 5, and the control module (5) compares the acquired speed with a target speed generated by a control program to adjust the rotating speed of each motor in real time.
The implementation method of the high-frequency induction heating heat treatment of the blades in the mixing drum comprises the following steps:
s1, setting a heat treatment starting point: after the mixing drum 4 is placed on the rotating mechanism 13, the rotation of the mixing drum 4 and the movement of the sliding table 331 and the sliding rail 332 are manually controlled, so that the high-frequency coil 335 and the cooling liquid spray head 337 are positioned at the starting position of the helical blade at the rear conical section of the mixing drum 4, and the positions of the helical blade are set as the starting point of the heat treatment process;
s2, inputting characteristic parameters of the mixing drum and generating a control program: the height B of the blade, the diameter D of the cylinder and the small diameter D of the rear cone which are input into the mixing drum (4) to be heat treated 1 Front taper minor diameter d 2 Rear cone width L 1 Front cone width L 2 Cylindrical section width H, back taper helix angle beta 1 Cylindrical segment helix angle beta 2 Front cone section helix angle beta 3 The rotation speed omega of the mixing drum, calculating the motion track of the helical blade by software in the control module 5 according to the input parameters, and decomposing the motion track along the axial direction and the radial direction of the mixing drum 4, thereby determining the displacement and the speed of the high-frequency coil 335 and the cooling liquid spray head 337 along the axial direction and the radial direction of the mixing drum 4 in the heat treatment process, and generating a control program;
s3, operating a program to perform heat treatment: the first stepping motor 333 drives the sliding table 331 to move on the guide rail 314 so as to drive the high-frequency coil 335 and the cooling liquid spray head 337 to move along the axial direction of the stirring drum 4; the second stepping motor 334 drives the slide rail 332 to move down or up on the slide table 331 relative to the slide table 331 to drive the high-frequency coil 335 and the cooling liquid spray head 337 to move along the radial direction of the mixing drum 4.
When the high-frequency induction heating heat treatment device for the blade in the mixing drum carries out heat treatment on a region to be heat treated of the blade, the retention time of the high-frequency coil 335 in the heating region is longer than the time for heating the region to be completely austenitized; after the heating of the heat treatment area is finished, the area moves to the position below the cooling liquid spray head 337 along with the rotation of the mixing drum, and cooling liquid is sprayed on the heated area to improve the cooling speed; the staying time of the high-frequency coil 335 in the heating area is determined by the rotating speed of the stirring cylinder 4;
in the working process, the control module 5 regulates the rotating speed of the variable frequency motor 24 through running a control program so as to control the rotating speed of the mixing drum 4; the control module 5 controls the motion state of the high-frequency coil 335 and the cooling liquid spray head 337 in the axial direction of the mixing drum 4 by adjusting the rotation speed and the rotation number of the first stepping motor 333 through the operation control program, and controls the motion state of the high-frequency coil 335 and the cooling liquid spray head 337 in the radial direction of the mixing drum 4 by adjusting the rotation speed and the rotation number of the second stepping motor 334; in the heat treatment process, the high-frequency coil 335 and the cooling liquid spray head 337 move along the track of the blade of the mixing drum all the time and keep 1-1.5 cm from the top of the blade; the flow rate of the cooling liquid is 2-5L/min, and the heating temperature range of the high-frequency coil 335 is 820-1200 ℃.

Claims (4)

1. A high-frequency induction heating heat treatment device for blades in a mixing drum is characterized in that: the device comprises a mixing drum supporting module (1), a driving module (2), a heating and cooling module (3), a mixing drum (4) and a control module (5);
the mixing drum supporting module (1) comprises a supporting frame (11), a limiting mechanism (12) and a rotating mechanism (13); the support frame (11) comprises square steel (111), a support frame base (112), a ground mat (113) and a bearing seat mounting plate (114); the limiting mechanism (12) comprises a first directional wheel (121) and a disc flange device (122); the first steering wheel is connected with the supporting frame (11) through a bolt, and the disc flange device is installed on the supporting frame (11) through welding and used for fixing the stirring cylinder (4) in the axial direction; the swing mechanism (13) comprises a vertical bearing seat (131), a rotating shaft (132), a rubber coating roller (133), a transition chain wheel (134), a driving chain wheel (135) and a driven belt wheel (136); the vertical bearing seat (131) is installed on the bearing seat installation plate (114) through screws, the rubber coating roller (133) is installed on the rotating shaft (132) through welding, and the transition chain wheel (134), the driving chain wheel (135) and the driven belt wheel (136) are connected with the shaft in a key connection mode and used for realizing synchronous rotation of the two rotating shafts (132) so as to drive the stirring drum to rotate;
the driving module (2) comprises a speed reducer rack (21), a speed reducer (22), a quincunx elastic coupling (23) and a variable frequency motor (24); the speed reducer (22), the variable frequency motor (24) and the speed reducer rack (21) are all connected through bolts; the driving module (2) transmits power to the rotating mechanism (13) through belt transmission to drive the mixing drum to rotate;
the heating and cooling module (3) comprises a walking device (31), a walking track (32), a power sliding table (33) and a water tank (34); the walking device (31) comprises a walking frame (311), a second directional wheel (312), a guide rail fixing seat (313) and a guide rail (314); the power sliding table (33) comprises a sliding table (331), a sliding rail (332), a first stepping motor (333), a second stepping motor (334), a high-frequency coil (335), a clamping lug (336) and a cooling liquid spray head (337); the high-frequency coil (335) and the cooling liquid spray head (337) are fixed on two sides of the bottom end of the sliding rail (332) through clamping lugs (336) and are separated by a certain distance; the first stepping motor (333) and the second stepping motor (334) are mounted on the sliding table (331) through screws and are respectively used for driving the sliding table (331) to translate on the guide rail (314) and driving the sliding rail (332) to descend or ascend;
the control module (5) comprises a microcomputer system, an ammeter arranged in a heating circuit, and a flow sensor and an electromagnetic valve which are arranged in a cooling liquid pipeline; the current in the heating circuit is collected through an ammeter, the current is converted into the heating temperature of the high-frequency coil (335), and the heating temperature is compared with the target heat treatment temperature, so that the current in the heating circuit is adjusted to realize the control of the heat treatment temperature; the speed sensors arranged on the variable frequency motor (24), the first stepping motor (333) and the second stepping motor (334) send collected speed data to the control module (5), and the control module (5) compares the collected speed with a target speed generated by a control program and adjusts the rotating speed of each motor in real time.
2. A high-frequency induction heating heat treatment device for blades in a mixing drum as defined in claim 1, the implementation method comprises the following steps:
s1, setting a heat treatment starting point: after the mixing drum (4) is placed on the rotating mechanism (13), the rotation of the mixing drum (4) and the movement of the sliding table (331) and the sliding rail (332) are manually controlled, so that the high-frequency coil (335) and the cooling liquid spray head (337) are positioned at the starting position of the spiral blade at the rear conical section of the mixing drum (4), and the positions of the high-frequency coil and the cooling liquid spray head are set as the starting points of the heat treatment process;
s2, inputting characteristic parameters of the mixing drum and generating a control program: the height B of the blade, the diameter D of the cylinder and the small diameter D of the rear cone which are input into the mixing drum (4) to be heat treated 1 Front taper minor diameter d 2 Rear cone width L 1 Front cone width L 2 The width H of the cylindrical section and the back cone helical angle beta 1 Cylindrical segment helix angle beta 2 Front cone section helix angle beta 3 The software in the control module (5) calculates the motion trail of the helical blade according to the input parameters and decomposes the motion trail along the axial direction and the radial direction of the mixing drum (4) so as to determine the displacement and the speed of the high-frequency coil (335) and the cooling liquid spray head (337) along the axial direction and the radial direction of the mixing drum (4) in the heat treatment process and generate a control program;
s3, operating a program to perform heat treatment: a first stepping motor (333) drives the sliding table (331) to move on the guide rail (314) so as to drive the high-frequency coil (335) and the cooling liquid spray head (337) to move along the axial direction of the stirring drum (4); the second stepping motor (334) drives the slide rail (332) to move downwards or upwards on the sliding table (331) relative to the sliding table (331) so as to drive the high-frequency coil (335) and the cooling liquid spray head (337) to move along the radial direction of the mixing drum (4).
3. The high-frequency induction heating heat treatment apparatus for the blade inside the mixing drum according to claim 1, wherein: when the area of the blade to be heat treated is subjected to heat treatment, the dwell time of the high-frequency coil (335) in the heating area is longer than the time for heating the area to be fully austenitized; after the heating of the heat treatment area is finished, the area moves to the position below a cooling liquid spray head (337) along with the rotation of the mixing drum, and cooling liquid is sprayed on the heated area to improve the cooling speed; the staying time of the high-frequency coil (335) in the heating area is determined by the rotating speed of the mixing drum (4);
the control module (5) adjusts the rotating speed of the variable frequency motor (24) through an operation control program in the heat treatment process so as to control the rotating speed of the mixing drum (4); the control module (5) controls the motion state of the high-frequency coil (335) and the cooling liquid spray head (337) along the axial direction of the mixing drum (4) by adjusting the rotating speed and the rotating number of turns of the first stepping motor (333) through running a control program, and controls the motion state of the high-frequency coil (335) and the cooling liquid spray head (337) along the radial direction of the mixing drum (4) by adjusting the rotating speed and the rotating number of turns of the second stepping motor (334); the high-frequency coil (335) and the cooling liquid spray head (337) move along the track of the blade of the mixing drum all the time and keep a certain distance from the top of the blade in the heat treatment process.
4. The high-frequency induction heating heat treatment device for the blade inside the mixing drum as set forth in claim 1, wherein: the distance between the high-frequency coil (335) and the cooling liquid spray head (337) and the top end of the blade is 1-1.5 cm all the time in the process of moving along the track of the blade of the mixing drum; the flow rate of the cooling liquid is 2-5L/min, and the heating temperature range of the high-frequency coil (335) is 820-1200 ℃.
CN202110907946.6A 2021-08-09 2021-08-09 High-frequency induction heating heat treatment device for blades in mixing drum and implementation method thereof Active CN113637824B (en)

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CN112853074A (en) * 2021-01-07 2021-05-28 王伟标 Tunnel furnace for barrel heat treatment

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JP2008231496A (en) * 2007-03-20 2008-10-02 High Frequency Heattreat Co Ltd High frequency induction heat treatment apparatus
JP2019014925A (en) * 2017-07-04 2019-01-31 富士電子工業株式会社 Cooling jacket for internal hardening of cylindrical workpiece, and arrangement structure of heating coil and cooling jacket of high frequency induction hardening device
CN112853074A (en) * 2021-01-07 2021-05-28 王伟标 Tunnel furnace for barrel heat treatment

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