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

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

A high-frequency induction heating heat treatment device for blades in a mixing drum and its implementation method

technical field

The invention relates to the field of concrete mixing and transportation devices, in particular to a heat treatment device for mixing drum blades.

Background technique

With the acceleration of national infrastructure construction and the promotion and popularization of commercial concrete in large and medium-sized cities in my country, a large number of commercial concrete manufacturing and transportation equipment have been developed rapidly. Among them, the concrete mixer truck has the advantages of convenient operation, high efficiency, simple maintenance, strong passability, and can enter various construction sites with harsh conditions, so it has become the main construction machinery in the process of concrete transportation.

The concrete mixing drum is a key part of the concrete mixer truck, and the mixing blades contained in it play a decisive role in the performance of the concrete mixing drum. In the actual production process, it is found that after the mixing drum has been used for a period of time, the top of the mixing blade inside the mixing drum is severely worn, so that the mixing blade is deformed, the top becomes thinner and even cracks appear, which leads to a decrease in the uniformity of concrete mixing, slower feeding and discharging speed, and increased Use and maintenance costs, reduce vehicle efficiency and reliability.

Most of the existing patents are to change the shape or structure of the blade to achieve the purpose of improving the wear resistance of the top of the blade, but this will make the structure or shape of the mixing blade complicated, and it will be difficult for construction personnel to install and process in actual production.

To sum up, how to provide a method and equipment with high production efficiency and simple operation for improving the wear resistance of the top of the mixing blade of the concrete mixing drum is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In order to solve the above problems, the present invention provides a high-frequency induction heating heat treatment device for the blades in the mixing drum and its implementation method, which heat-treats the top ends of the stirring blades that have been welded on the mixing drum. The wear resistance of the blades of the mixing drum is improved by heat treatment, so as to prolong the service life of the concrete mixing drum.

The technical scheme of the present invention is as follows: a high-frequency induction heating heat treatment device for blades in a mixing drum and its implementation method, which is characterized in that it specifically includes a mixing drum support module (1), a driving module (2), and a heating and cooling module (3) , mixing drum (4), control module (5);

Further, the mixing drum support module (1) includes a support frame (11), a limit mechanism (12), a rotary mechanism (13); the support frame (11) includes a square steel (111), a support frame base ( 112), ground pad (113), bearing seat mounting plate (114); the limit mechanism (12) includes a first directional wheel (121), and a disc flange device (122). Wherein the first directional wheel is connected with the support frame (11) by bolts, and the disc flange device is installed on the support frame (11) by welding, and is used to fix the mixing drum (4) in the axial direction; the rotary mechanism ( 13) It includes a vertical bearing seat (131), a rotating shaft (132), a rubber-coated roller (133), a transition sprocket (134), a driving sprocket (135), and a driven pulley (136). The vertical bearing seat (131) is installed on the bearing seat mounting plate (114) by screws, the rubber-covered roller (133) is installed on the rotating shaft (132) by welding, the transition sprocket (134), the driving chain The connection of wheel (135), driven pulley (136) and the shaft is a key connection, which is used to realize the synchronous rotation of the two rotating shafts (132) to drive the mixing drum to rotate;

Further, the drive module (2) includes a reducer stand (21), a reducer (22), a quincunx-shaped elastic coupling (23), and a variable frequency motor (24). The reducer (22), the frequency conversion motor (24) and the reducer stand (21) are all connected by bolts; the drive module (2) transmits power to the rotary mechanism (13) through a belt drive to drive the mixing drum to rotate ;

Further, the heating and cooling module (3) includes a traveling device (31), a traveling track (32), a power slide (33), a water tank (34), and a gas cylinder (35); the traveling device (31) includes Walking frame (311), second directional wheels (312), guide rail fixing seat (313), guide rail (314); described power slide table (33) comprises slide table (331), slide rail (332), the first step Into the motor (333), the second stepping motor (334), high-frequency coil (335), clip ear (336), coolant nozzle (337); the high-frequency coil (335), coolant nozzle (337) Both are fixed on both sides of the bottom end of the slide rail through clip ears (336), and the first stepping motor (333) and the second stepping motor (334) are installed on the slide table (331) by screws, and are respectively used to drive the slide table Translational movement on the guide rail (314) and the descent or rise of the drive slide rail (332);

The control module (5) includes a microcomputer system, an ammeter installed in the heating circuit and a flow sensor and a solenoid valve in the coolant pipeline; the ammeter collects the magnitude of the current in the heating circuit, and converts the magnitude of the current into a high-frequency The size of coil (335) heating temperature, and compare with target heat treatment temperature, and then regulate the electric current in the heating circuit to realize the control to heat treatment temperature; Two, the speed sensor on the stepper motor (334) sends the collected speed data to the control module (5), and the control module (5) compares the collected speed with the target speed generated by the control program, and adjusts each motor in real time speed.

A further implementation method of high-frequency induction heating heat treatment of blades in the mixing drum comprises the following steps:

S1, setting the starting point of heat treatment: After placing the mixing drum (4) on the rotary mechanism (13), manually control the rotation of the mixing drum (4) and the movement of the slide table (331) and slide rail (332), so that the high-frequency coil (335) and cooling liquid nozzle (337) are at the starting point of the cone section helical blade behind the mixing drum (4), and its position is set as the starting point of the heat treatment process;

S2. Input the characteristic parameters of the mixing drum and generate a control program: input the blade height B, cylinder diameter D, rear cone diameter d ₁ , front cone diameter d ₂ , rear cone width L ₁ , front cone diameter of the mixing drum (4) to be heat treated. The value of width L ₂ , width H of cylindrical section, rear cone helix angle β ₁ , cylindrical section helix angle β ₂ , front cone section helix angle β ₃ , mixing drum rotation speed ω, the software in the control module (5) is based on the input Calculate the motion trajectory of the helical blade according to the parameters, and decompose the motion trajectory along the axial and radial directions of the mixing drum (4), so as to determine the high-frequency coil (335), coolant nozzle (337) in the heat treatment process Displacement and speed along the axial and radial directions of the mixing drum (4), and generate a control program;

S3, run the program for heat treatment: the first stepper motor (333) drives the slide table (331) to move on the guide rail (314) to drive the high-frequency coil (335), the coolant nozzle (337) along the direction of the mixing drum (4) Axial movement; the second stepper motor (334) drives the slide rail (332) to perform a descending or rising action on the slide table (331) relative to the slide table (331) to drive the high-frequency coil (335), coolant The spray head (337) moves along the radial direction of the mixing drum (4).

Further, when heat-treating the area of the blade to be heat-treated, the residence time of the high-frequency coil (335) in the heating area is longer than the time for heating the area to complete austenitization; With the rotary motion of the mixing drum to the below of the cooling liquid nozzle (337), the cooling liquid is sprayed on the heated area to increase the cooling rate; the residence time of the cooling liquid nozzle (337) in the heating area is determined by the time Rotation speed decision;

Further, in the working process, the control module (5) adjusts the rotating speed of the variable frequency motor (24) through the operation control program to control the rotation speed of the mixing drum (4); the control module (5) adjusts the first stepping motor ( 333) and the number of rotations to control the motion state of the high-frequency coil (335) and the coolant nozzle (337) along the axial direction of the mixing drum (4), by adjusting the speed and rotation of the second stepping motor (334) The number of turns controls the movement state of the high-frequency coil (335) and the cooling liquid nozzle (337) along the radial direction of the mixing drum (4); during the heat treatment process, the high-frequency coil (335) and the cooling liquid nozzle (337) always follow the blades of the mixing drum The track moves and keeps a certain distance from the top of the blade.

As preferably, the support frame base (112) and the ground pad (113) form a leveling mechanism, use anchor bolts to fix the ground pad (113) on the ground and then screw it into the horizontal adjustment screw hole group on the support frame base (112). Insert adjusting screw, control the depth that adjusting screw is screwed in and can realize the horizontal adjustment of support frame (11).

As preferably, the rubber coated on the outer layer of the rubber-coated roller (133) should have a certain flexibility and have a non-slip texture, increase the friction between the rubber-coated roller (133) and the mixing drum (4), and avoid slippage occurs. The disc flange in the disc flange device (122) should also be coated with rubber to avoid scratching the surface of the mixing drum during use.

The beneficial effects of the present invention are: a high-frequency induction heating heat treatment device for blades in the mixing drum and its implementation method, which performs a heat treatment process on the spiral blades welded on the mixing drum, improves the wear resistance of the mixing drum blades, and achieves The purpose of the service life of the concrete mixing drum.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Fig. 1 is a schematic diagram of the structure of the present invention.

Figure 2 is a schematic diagram of the structure of the supporting module.

Figure 3 is a schematic diagram of the structure of the drive module.

Figure 4 is a schematic diagram of the structure of the heating and cooling module.

Figure 5 and Figure 6 are schematic diagrams of the structure of the guide rail fixing seat and the power slide table

In the figure: 1-support module, 2-drive module, 3-heating and cooling module, 4-mixing drum, 11-support frame, 12-limit mechanism, 13-rotary mechanism, 111-square steel, 112-support frame base , 113-floor mat, 114-bearing seat mounting plate, 121-first directional wheel, 122-disc flange device, 131-vertical bearing seat, 132-rotating shaft, 133-rubber coated roller, 134 -Transition sprocket, 135-driving sprocket, 136-driven pulley, 21-reducer stand, 22-reducer, 23-plum blossom-shaped elastic coupling, 24-frequency conversion motor, 31-traveling device, 32 -walking track, 33-power slide, 34-water tank, 311-walking frame, 312-second directional wheel, 313-rail fixing seat, 314-guide rail, 331-power slide, 332-slide rail, 333-the first Stepping motor, 334-second stepping motor, 335-high-frequency coil, 336-clip ear, 337-coolant nozzle

specific implementation plan

The specific implementation is as follows:

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Wherein, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical drawings, and should not be construed as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, Enlarged or reduced, does not represent actual product size.

The invention provides a high-frequency induction heating heat treatment device for blades in a mixing drum and its implementation method, which is characterized in that it specifically includes a mixing drum support module 1, a driving module 2, a heating and cooling module 3, a mixing drum 4, and a control module 5;

The mixing drum support module 1 includes a support frame 11, a limit mechanism 12, and a rotary mechanism 13; the support frame 11 includes a square steel 111, a support frame base 112, a floor mat 113, and a bearing seat mounting plate 114; the limit The mechanism 12 includes a first directional wheel 121 and a disk flange device 122; wherein the first directional wheel is connected to the support frame 11 through bolts, and the disk flange device is installed on the support frame 11 by welding for axial Direction fixed mixing drum 4; the rotary mechanism 13 includes a vertical bearing seat 131, a rotating shaft 132, a rubber-coated roller 133, a transition sprocket 134, a driving sprocket 135, and a driven pulley 136; the vertical bearing The seat 131 is installed on the bearing seat mounting plate 114 by screws, the rubber-coated roller 133 is installed on the rotating shaft 132 by welding, and the transition sprocket 134, the driving sprocket 135, the driven pulley 136 and the shaft are all connected by keys. connected to realize the synchronous rotation of the two rotating shafts 132 to drive the mixing drum to rotate;

The drive module 2 includes a reducer stand 21, a reducer 22, a quincunx-shaped elastic coupling 23, and a variable frequency motor 24; the reducer 22, the motor 23 and the reducer stand 21 are all connected by bolts; the drive The module 2 transmits the power to the rotary mechanism 13 through the belt drive to drive the mixing drum to rotate;

The heating and cooling module 3 includes a traveling device 31, a traveling track 32, a power slide 33, and a water tank 34; the traveling device 31 includes a traveling frame 311, a second directional wheel 312, a guide rail fixing seat 313, and a guide rail 314; the power Slide table 33 comprises slide table 331, slide rail 332, first stepper motor 333, second stepper motor 334, high-frequency coil 335, clip ear 336, coolant nozzle 337; Described coolant nozzle 337, high-frequency coil 335 are all fixed on both sides of the bottom end of the slide rail 332 by clip ears 336 and the two are separated by a certain distance; the first stepper motor 333 and the second stepper motor 334 are installed on the slide table 331 by screws, and are respectively used to drive the slide table 331 translates on the guide rail 314 and drives the slide rail 332 to descend and rise relative to the slide table 331;

The control module 5 includes a microcomputer system, an ammeter installed in the heating circuit and a flow sensor and a solenoid valve in the coolant pipeline; the current in the heating circuit is collected by the ammeter, and the current is converted into a high-frequency coil 335 The size of the heating temperature, and compared with the target heat treatment temperature, and then adjust the current in the heating circuit to realize the control of the heat treatment temperature; The sensor sends the collected speed data to the control module 5, and the control module (5) compares the collected speed with the target speed generated by the control program, and adjusts the 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 the starting point of heat treatment: After placing the mixing drum 4 on the rotary mechanism 13, manually control the rotation of the mixing drum 4 and the movement of the sliding table 331 and the slide rail 332, so that the high-frequency coil 335 and the cooling liquid nozzle 337 are in the mixing drum 4 The starting point of the helical blade in the rear cone section, set its position as the starting point of the heat treatment process;

S2. Input the characteristic parameters of the mixing drum and generate a control program: input the blade height B, cylinder diameter D, rear cone diameter d ₁ , front cone diameter d ₂ , rear cone width L ₁ , front cone diameter of the mixing drum (4) to be heat treated. Width L ₂ , column width H, rear cone helix angle β ₁ , cylinder helix angle β ₂ , front cone helix angle β ₃ , and mixing drum rotation speed ω, the software in the control module 5 is based on the input parameters Calculate the motion trajectory of the helical blade, and simultaneously decompose the motion trajectory along the axial and radial directions of the mixing drum 4, thereby determining that the high-frequency coil 335 and the cooling liquid nozzle 337 are along the axial and radial directions of the mixing drum 4 during the heat treatment process. Displacement and velocity in the radial direction, and generate a control program;

S3, run the program for heat treatment: the first stepping motor 333 drives the slide table 331 to move on the guide rail 314 to drive the high-frequency coil 335 and the coolant nozzle 337 to move along the axial direction of the mixing drum 4; the second stepping motor 334 drives The slide rail 332 moves down or up relative to the slide table 331 on the slide table 331 to drive the high-frequency coil 335 and the coolant nozzle 337 to move along the radial direction of the mixing drum 4 .

When the blade high-frequency induction heating heat treatment device in the mixing drum heat-treats the area of the blade to be heat-treated, the residence time of the high-frequency coil 335 in the heating area is longer than the time for heating the area to complete austenitization; After the zone is heated, the zone moves to the bottom of the cooling liquid spray nozzle 337 along with the rotary motion of the mixing drum, and the cooling liquid is sprayed on the heated zone to increase the cooling rate; the residence time of the high-frequency coil 335 in the heating zone is determined by the The rotation speed is determined;

During the working process, the control module 5 adjusts the rotating speed of the variable frequency motor 24 through the operation control program to control the rotation speed of the mixing drum 4; the control module 5 adjusts the rotation speed and the number of rotations of the first stepper motor 333 through the operation control program to control the high frequency coil 335 and the cooling liquid spray nozzle 337 along the motion state of the mixing drum 4 axial direction, by adjusting the rotating speed and the number of turns of the second stepper motor 334 to control the high frequency coil 335 and the cooling liquid spray nozzle 337 along the mixing drum 4 radial direction Motion state; during the heat treatment process, the high frequency coil 335 and the coolant nozzle 337 always follow the track of the mixing drum blade and keep 1-1.5 cm from the top of the blade; the flow rate of the coolant is 2-5L/min, and the high frequency coil 335 heats the temperature range It is 820-1200°C.

Claims (4)

1. A high-frequency induction heating heat treatment device for blades in a mixing drum, characterized in that it specifically includes a mixing drum support module (1), a drive module (2), a heating and cooling module (3), a mixing drum (4), and a control module (5); The mixing drum support module (1) includes a support frame (11), a limit mechanism (12), a rotary mechanism (13); the support frame (11) includes a square steel (111), a support frame base (112), Ground pad (113), bearing seat mounting plate (114); Described limit mechanism (12) comprises the first directional wheel (121), disc flange device (122); Wherein the first directional wheel is connected with bolt and The support frame (11) is connected, and the disc flange device is installed on the support frame (11) by welding, which is used to fix the mixing drum (4) in the axial direction; the rotary mechanism (13) includes a vertical bearing seat (131 ), rotating shaft (132), rubber coated roller (133), transition sprocket (134), driving sprocket (135), driven pulley (136); the vertical bearing seat (131) is screwed Installed on the bearing seat mounting plate (114), the rubber coated roller (133) is installed on the rotating shaft (132) by welding, the transition sprocket (134), the driving sprocket (135), the driven pulley (136 ) is connected with the shaft by a key, which is used to realize the synchronous rotation of the two rotating shafts (132) to drive the mixing drum to rotate; The drive module (2) comprises a reducer stand (21), a reducer (22), a quincunx-shaped elastic coupling (23), a variable frequency motor (24); the reducer (22), a variable frequency motor (24 ) and the reducer stand (21) are bolted; the drive module (2) transmits power to the rotary mechanism (13) through a belt drive to drive the mixing drum to rotate; The heating and cooling module (3) includes a traveling device (31), a traveling track (32), a power slide (33), a water tank (34); the traveling device (31) includes a traveling frame (311), a second orientation Wheel (312), guide rail holder (313), guide rail (314); Described power slide table (33) comprises slide table (331), slide rail (332), the first stepper motor (333), the second step Into the motor (334), high-frequency coil (335), clip ear (336), coolant nozzle (337); the high-frequency coil (335), coolant nozzle (337) are all fixed on the Both sides of the bottom end of the slide rail (332) and the two are separated by a certain distance; the first stepper motor (333) and the second stepper motor (334) are installed on the slide table (331) by screws, and are respectively used to drive the slide table (331) translation on the guide rail (314) and the descent or rise of the drive slide rail (332); The control module (5) includes a microcomputer system, an ammeter installed in the heating circuit and a flow sensor and a solenoid valve in the coolant pipeline; the ammeter collects the magnitude of the current in the heating circuit, and converts the magnitude of the current into a high-frequency The size of coil (335) heating temperature, and compare with target heat treatment temperature, and then regulate the electric current in the heating circuit to realize the control to heat treatment temperature; Two, the speed sensor on the stepper motor (334) sends the collected speed data to the control module (5), and the control module (5) compares the collected speed with the target speed generated by the control program, and adjusts each motor in real time speed. 2. a high-frequency induction heating heat treatment device for blades in the mixing drum as claimed in claim 1, its implementation method comprises the following steps: S1, setting the starting point of heat treatment: After placing the mixing drum (4) on the rotary mechanism (13), manually control the rotation of the mixing drum (4) and the movement of the slide table (331) and slide rail (332), so that the high-frequency coil (335) and cooling liquid nozzle (337) are at the starting point of the cone section helical blade behind the mixing drum (4), and its position is set as the starting point of the heat treatment process; S2. Input the characteristic parameters of the mixing drum and generate a control program: input the blade height B, cylinder diameter D, rear cone diameter d ₁ , front cone diameter d ₂ , rear cone width L ₁ , front cone diameter of the mixing drum (4) to be heat treated. The value of width L ₂ , width H of cylindrical section, rear cone helix angle β ₁ , cylindrical section helix angle β ₂ , front cone section helix angle β ₃ , mixing drum rotation speed ω, the software in the control module (5) is based on the input Calculate the motion trajectory of the helical blade according to the parameters, and decompose the motion trajectory along the axial and radial directions of the mixing drum (4), so as to determine the high-frequency coil (335), coolant nozzle (337) in the heat treatment process Displacement and speed along the axial and radial directions of the mixing drum (4), and generate a control program; S3, run the program for heat treatment: the first stepper motor (333) drives the slide table (331) to move on the guide rail (314) to drive the high-frequency coil (335), the coolant nozzle (337) along the direction of the mixing drum (4) Axial movement; the second stepper motor (334) drives the slide rail (332) to perform a descending or rising action on the slide table (331) relative to the slide table (331) to drive the high-frequency coil (335), coolant The spray head (337) moves along the radial direction of the mixing drum (4). 3. The high-frequency induction heating heat treatment device for blades in a mixing drum according to claim 1, characterized in that: when the heat treatment area of the blade is to be heat-treated, the residence time of the high-frequency coil (335) in the heating area is longer than The zone is heated to the time of complete austenitization; after the heat treatment zone is heated, the zone moves to the bottom of the cooling liquid nozzle (337) with the rotation of the mixing drum, and the cooling liquid is sprayed on the heated zone to increase the cooling rate; The residence time of the high-frequency coil (335) in the heating zone is determined by the rotation speed of the mixing drum (4); In the heat treatment process, the control module (5) adjusts the rotating speed of the variable frequency motor (24) through the operation control program to control the rotation speed of the mixing drum (4); the control module (5) adjusts the rotation speed of the first stepping motor (333) through the operation control program. The rotation speed and the number of rotations control the motion state of the high-frequency coil (335) and the coolant nozzle (337) along the axial direction of the mixing drum (4), and are controlled by adjusting the rotation speed and the number of rotations of the second stepper motor (334). The motion state of the high-frequency coil (335) and the cooling liquid nozzle (337) along the radial direction of the mixing drum (4); during the heat treatment process, the high-frequency coil (335) and the cooling liquid nozzle (337) always follow the trajectory of the mixing drum blades And keep a certain distance from the top of the blade. 4. A high-frequency induction heating heat treatment device for blades in the mixing drum according to claim 1, characterized in that: the high-frequency coil (335) and the cooling liquid nozzle (337) are always moving along the track of the blades of the mixing drum The distance from the top of the blade is 1-1.5 cm; the flow rate of the coolant is 2-5L/min, and the heating temperature range of the high-frequency coil (335) is 820-1200°C.

Images