CN114717387A - Intermediate-frequency induction heating process for fork machining - Google Patents

Intermediate-frequency induction heating process for fork machining Download PDF

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Publication number
CN114717387A
CN114717387A CN202210392372.8A CN202210392372A CN114717387A CN 114717387 A CN114717387 A CN 114717387A CN 202210392372 A CN202210392372 A CN 202210392372A CN 114717387 A CN114717387 A CN 114717387A
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fork
induction heating
workpiece
pallet fork
medium
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冯殿胜
王国毅
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Individual
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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching
    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0025—Supports; Baskets; Containers; Covers
    • 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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  • Chemical & Material Sciences (AREA)
  • 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 medium-frequency induction heating process for fork machining, which relates to the technical field of fork heat treatment machining, adopts a medium-frequency induction heating furnace system for fork machining to perform machining operation, and comprises the following steps: s1, performing accessory welding on the bent pallet fork workpiece; s2, carrying out weld joint detection on the pallet fork workpiece after the accessory is welded; s3, stacking the pallet fork workpiece on a stacking roller way of a feeding mechanism by using a forklift, and then conveying the pallet fork workpiece to an L-shaped profiling coil furnace body of the induction heating furnace by using the feeding mechanism; s4, carrying out medium-frequency uniform heating on a pallet fork workpiece in the L-shaped profiling coil furnace body by the induction heating furnace under the control of a medium-frequency IGBT power supply; according to the invention, the fork is subjected to heat treatment processing by adopting a medium-frequency induction matched water quenching mode, the heating speed of the fork is high, the production processing efficiency is high, and after the fork is subjected to heat treatment processing by adopting the process, the integral hardness performance is high, uniform and basically consistent, and no deformation occurs during use.

Description

Intermediate-frequency induction heating process for fork machining
Technical Field
The invention relates to the technical field of fork heat treatment processing, in particular to a medium-frequency induction heating process for fork processing.
Background
In the process of processing the fork, the fork straight blank needs to be bent to a required right-angle structure to form an L-shaped steel member, and the L-shaped steel member needs to be subjected to heat treatment processing to improve the physical performance of the fork.
The resistance furnace, the natural gas furnace and the like are generally adopted for carrying out heat treatment processing on the fork in the forklift fork industry, the two heating furnaces are adopted for heating the fork, the fork needs to be manually carried, the labor intensity is high, the two heating furnaces are high in energy consumption and low in efficiency for the fork, moreover, after the two heating furnaces are used for heating the fork, the hardness performance of the fork is often uneven, the surface hardness of the quenched fork cannot exceed Brinell hardness 450HB at most through conventional measurement, and the straight surface deformation is large and the angle is inconsistent.
Intermediate frequency induction heating equipment obtains promoting gradually as an environmental protection processing equipment, and it utilizes electromagnetic induction's principle, makes and produces the vortex in arranging the work piece in induction coil in to make the work piece generate heat, heat to required temperature, equipment adopts series resonance or parallel resonance, therefore power factor is higher, compares with traditional heating methods and has efficient, pollutes advantages such as little.
However, the prior art of adopting an intermediate frequency induction heating furnace for heat treatment is basically in the industries of steel mills, round steel, gears and the like, and no equipment is used for completing heat treatment in the industry of fork forks of forklifts, so that the following problems in the heat treatment process of the fork forks are solved by improving the heat treatment equipment of the fork forks: the existing heating furnace has low heating efficiency on the pallet fork, high energy consumption, low hardness and inconsistency after quenching treatment of the pallet fork, inconsistent deformation of the angle of the pallet fork and the plane of the pallet fork and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a medium-frequency induction heating process for fork processing, which is used for solving the technical problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a medium-frequency induction heating process for fork machining adopts a medium-frequency induction heating furnace system for fork machining to perform machining operation, and comprises the following steps:
s1, performing accessory welding on the bent pallet fork workpiece;
s2, carrying out weld joint detection on the pallet fork workpiece after the accessory is welded;
s3, stacking the pallet fork workpiece on a stacking roller way of a feeding mechanism by using a forklift, and then conveying the pallet fork workpiece to an L-shaped profiling coil furnace body of the induction heating furnace by the feeding mechanism;
s4, carrying out medium-frequency uniform heating on the pallet fork workpiece in the L-shaped profiling coil furnace body by the induction heating furnace under the control of a medium-frequency IGBT power supply;
s5, transferring the fork workpiece subjected to the heating treatment in the induction heating furnace to a tool clamp of the tool lifting mechanism by using the sliding trolley;
s6, lowering the tooling fixture loaded with the fork workpiece into a cooling tank by a gantry crane of the tooling lifting mechanism so as to carry out water-entering quenching treatment on the fork workpiece on the tooling fixture;
s7, after the water quenching treatment of the pallet fork workpiece is completed, the sliding trolley forks the pallet fork workpiece on the tool clamp and places the pallet fork workpiece on a stacking roller way of a discharging mechanism;
s8, the discharging mechanism finishes discharging and conveying the pallet fork workpiece after medium-frequency induction quenching.
Preferably, the speed of the feeding mechanism for feeding the pallet fork workpieces in the S3 is 0.5-1 min per piece.
Preferably, the heating temperature of the induction heating furnace for the pallet fork workpiece is controlled to be 850 ℃ and 870 ℃ in S4.
Preferably, the intermediate frequency IGBT power supply in S4 controls the intermediate frequency heating output power of the induction heating furnace to be 500 KW-600 KW.
Preferably, at least one tool clamp of the tool lifting mechanism in S5 is provided.
Preferably, the cooling medium in the cooling tank in S6 is ordinary water, brine or alkaline water.
Preferably, the medium frequency induction heating furnace system for fork processing comprises:
the feeding mechanism is used for accumulating the pallet fork workpieces and pushing the pallet fork workpieces into the induction heating furnace;
the induction heating furnace is fixedly arranged at a discharge port at the tail end of the feeding mechanism, is matched and connected with a medium-frequency IGBT power supply and is used for carrying out medium-frequency induction heating on the pushed pallet fork workpiece;
the discharging mechanism is fixedly arranged at a discharging port of the induction heating furnace and is used for transferring and discharging the heated pallet fork workpiece;
the tooling lifting mechanism is fixedly arranged between the induction heating furnace and the discharging mechanism and comprises a gantry crane and tooling fixtures connected with the gantry crane, the tooling fixtures are used for placing and clamping the fork workpieces, and during work, the gantry crane drives at least one tooling fixture to ascend or descend so as to place the fork workpieces on the tooling fixtures in the cooling tank;
and the cooling tank is fixedly arranged at the bottom of the tool lifting mechanism, and cooling water is stored in the cooling tank and used for quenching the heated fork workpiece in water.
Preferably, the induction heating furnace comprises an L-shaped copying coil furnace body, a support frame is arranged in the L-shaped copying coil furnace body, an electric fuse for intermediate frequency is fixedly installed at the bottom of the support frame, the electric fuse for intermediate frequency is electrically connected with a coil in the L-shaped copying coil furnace body, a pallet fork workpiece inlet is formed in the front end of the L-shaped copying coil furnace body, a pallet fork workpiece outlet is formed in the tail end of the L-shaped copying coil furnace body, and a water-cooling stainless steel slideway is further arranged in a heating cavity of the L-shaped copying coil furnace body.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the fork is subjected to heat treatment processing by adopting a medium-frequency induction matched water quenching mode, so that the fork is high in heating speed and high in production and processing efficiency; during induction heating, rely on induced-current directly to heat the fork, the heat loss is few, and the fork adopts above-mentioned technology to carry out the thermal treatment processing back, and whole hardness performance is high, and even basic unanimity, and the surface hardness minimum is Brinell hardness 500HB after the fork quenches, and the straight face of fork and angle can be unanimous basically, and the later stage is installed and is taken place in the condition that the use does not have the deformation basically on the fork truck.
Drawings
FIG. 1 is a schematic process flow diagram of a medium frequency induction heating process for fork processing according to the present invention;
FIG. 2 is a schematic view of the overall structure of an intermediate frequency induction heating furnace system of the intermediate frequency induction heating process for fork processing according to the present invention;
FIG. 3 is a schematic structural diagram of a feeding mechanism of the medium frequency induction heating furnace system for fork processing according to the present invention;
FIG. 4 is a schematic view of an induction heating furnace of the medium frequency induction heating furnace system for fork processing of the present invention;
FIG. 5 is a schematic structural view of a tooling lifting mechanism of the medium frequency induction heating furnace system for fork processing of the present invention;
fig. 6 is a schematic structural view of a discharging mechanism of the medium-frequency induction heating furnace system for fork processing of the present invention.
1. A feeding mechanism; 2. an induction heating furnace; 3. a cooling tank; 4. a tool lifting mechanism; 5. a discharging mechanism;
11. a feeding platform; 12. accumulating the roller way A; 13. a side push assembly; 14. a feeding assembly; 15. a material pushing assembly; 16. a frame B; 17. a frame A; 18. a deviation rectifying roller bed B; 19. a deviation rectifying roller bed A; 21. l-shaped profiling coil furnace bodies; 22. a support frame; 23. electric melting is carried out for intermediate frequency; 24. a pallet fork workpiece inlet; 25. a pallet fork workpiece outlet; 26. a water-cooled stainless steel slide; 41. a gantry lift; 42. a tooling fixture; 51. a strip-shaped frame; 52. a lifter; 53. a sliding trolley; 54. a load-bearing chassis; 55. taking fork teeth; 56. a rack guide rail; 57. a frame C; 58. erecting a frame; 59. accumulating the roller bed B;
111. a notch; 131. pushing the plate; 411. a guide wheel; 412. a hoisting chain; 413. a lifting executive component; 414. a gantry; 421. an L-shaped platform; 422. a fork handle pressing member; 423. a fork wall compression member; 424. a frame body; 531. driving the executive component; 532. a limiting wheel; 533. a flat table.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
In this embodiment, an intermediate frequency induction heating process for fork processing is provided, which uses an intermediate frequency induction heating furnace system for fork processing to perform processing operation, referring to fig. 1, and includes the following steps:
s1, performing accessory welding on the bent pallet fork workpiece;
s2, carrying out weld joint detection on the pallet fork workpiece after the accessory is welded;
s3, stacking the pallet fork workpiece on a stacking roller way of a feeding mechanism by using a forklift, and then conveying the pallet fork workpiece to an L-shaped profiling coil furnace body of the induction heating furnace by the feeding mechanism;
s4, the induction heating furnace uniformly heats the pallet fork workpiece in the L-shaped profiling coil furnace body at the intermediate frequency under the control of the intermediate frequency IGBT power supply;
s5, transferring the fork workpiece subjected to the heating treatment in the induction heating furnace to a tool clamp of the tool lifting mechanism by using the sliding trolley;
s6, lowering the tooling fixture loaded with the fork workpiece into a cooling tank by a gantry crane of the tooling lifting mechanism so as to carry out water-entering quenching treatment on the fork workpiece on the tooling fixture;
s7, after the water quenching treatment of the pallet fork workpiece is completed, the sliding trolley forks the pallet fork workpiece on the tool clamp and places the pallet fork workpiece on a stacking roller way of a discharging mechanism;
s8, the discharging mechanism finishes discharging and conveying the pallet fork workpiece after medium-frequency induction quenching.
In this embodiment, the speed of the feeding mechanism in S3 for feeding the pallet fork workpiece is 0.5min per pallet fork workpiece.
In this embodiment, the heating temperature of the induction heating furnace in S4 on the pallet fork workpiece is controlled to be 850 ℃.
In this embodiment, the intermediate frequency IGBT power supply in S4 controls the output power of the intermediate frequency heating of the induction heating furnace to be 500 KW.
In this embodiment, at least one tool holder of the tool lifting mechanism in S5 is provided.
In this embodiment, the cooling medium in the cooling tank in S6 is normal water.
Example 2
In this embodiment, an intermediate frequency induction heating process for fork processing is provided, which uses an intermediate frequency induction heating furnace system for fork processing to perform processing operation, and with reference to fig. 1, includes the following steps:
s1, performing accessory welding on the bent pallet fork workpiece;
s2, carrying out weld joint detection on the pallet fork workpiece after the accessory is welded;
s3, stacking the pallet fork workpiece on a stacking roller way of a feeding mechanism by using a forklift, and then conveying the pallet fork workpiece to an L-shaped profiling coil furnace body of the induction heating furnace by using the feeding mechanism;
s4, the induction heating furnace uniformly heats the pallet fork workpiece in the L-shaped profiling coil furnace body at the intermediate frequency under the control of the intermediate frequency IGBT power supply;
s5, transferring the fork workpiece subjected to the heating treatment in the induction heating furnace to a tool clamp of the tool lifting mechanism by using the sliding trolley;
s6, lowering the tooling fixture loaded with the fork workpiece into a cooling tank by a gantry crane of the tooling lifting mechanism so as to carry out water-entering quenching treatment on the fork workpiece on the tooling fixture;
s7, after the water quenching treatment of the pallet fork workpiece is completed, the sliding trolley forks the pallet fork workpiece on the tool clamp and places the pallet fork workpiece on a stacking roller way of a discharging mechanism;
s8, the discharging mechanism finishes discharging and conveying the pallet fork workpiece after medium-frequency induction quenching.
In this embodiment, the speed of the feeding mechanism for feeding the pallet fork workpiece in S3 is 1min per workpiece.
In this embodiment, the heating temperature of the induction heating furnace in S4 to the pallet fork workpiece is 870 ℃.
In this embodiment, the intermediate frequency IGBT power supply in S4 controls the output power of the intermediate frequency heating of the induction heating furnace to be 600 KW.
In this embodiment, at least one tool holder of the tool lifting mechanism in S5 is provided.
In this embodiment, the cooling medium in the cooling tank in S6 is brine.
In consideration of the hardenability of the pallet fork workpiece 5 which is too thick, a proper amount of salt can be added into water, after the high-temperature workpiece is immersed into the cooling medium, salt crystals are separated out at the steam film stage and immediately burst, the steam film is broken, and oxide skin on the surface of the pallet fork workpiece 5 is also smashed, so that the cooling capacity of the medium in a high-temperature area can be improved, but the pallet fork workpiece 5 is cleaned in time after being quenched and subjected to rust-proof treatment.
Example 3
In this embodiment, an intermediate frequency induction heating process for fork processing is provided, which uses an intermediate frequency induction heating furnace system for fork processing to perform processing operation, and with reference to fig. 1, includes the following steps:
s1, performing accessory welding on the bent pallet fork workpiece;
s2, carrying out weld joint detection on the pallet fork workpiece after the accessory is welded;
s3, stacking the pallet fork workpiece on a stacking roller way of a feeding mechanism by using a forklift, and then conveying the pallet fork workpiece to an L-shaped profiling coil furnace body of the induction heating furnace by the feeding mechanism;
s4, the induction heating furnace uniformly heats the pallet fork workpiece in the L-shaped profiling coil furnace body at the intermediate frequency under the control of the intermediate frequency IGBT power supply;
s5, transferring the fork workpiece subjected to the heating treatment in the induction heating furnace to a tool clamp of the tool lifting mechanism by using the sliding trolley;
s6, lowering the tooling fixture loaded with the fork workpiece into a cooling tank by a gantry crane of the tooling lifting mechanism so as to carry out water-entering quenching treatment on the fork workpiece on the tooling fixture;
s7, after the water quenching treatment of the pallet fork workpiece is completed, the sliding trolley forks the pallet fork workpiece on the tool clamp and places the pallet fork workpiece on a stacking roller way of a discharging mechanism;
s8, the discharging mechanism finishes discharging and conveying the pallet fork workpiece after medium-frequency induction quenching.
In this embodiment, the speed of the feeding mechanism in S3 for feeding the pallet fork workpiece is 0.8min per pallet fork workpiece.
In this embodiment, the heating temperature of the induction heating furnace in S4 to the pallet fork workpiece is 860 ℃.
In this embodiment, the intermediate frequency IGBT power supply in S4 controls the output power of the intermediate frequency heating of the induction heating furnace to be 550 KW.
In this embodiment, at least one tool holder of the tool lifting mechanism in S5 is provided.
In this embodiment, the cooling medium in the cooling tank in S6 is alkaline water.
In consideration of the hardenability of the pallet fork workpiece 5 which is too thick, a proper amount of alkali can be added into water, after the high-temperature workpiece is immersed into the cooling medium, crystals of the alkali are precipitated at the steam film stage and immediately burst, the steam film is damaged, and oxide skin on the surface of the pallet fork workpiece 5 is also smashed, so that the cooling capacity of the medium in a high-temperature area can be improved, but the pallet fork workpiece 5 needs to be cleaned in time and subjected to rust prevention treatment after being quenched.
Example 4
Referring to fig. 2, in order to ensure the medium frequency quenching efficiency and quality of the fork workpiece, the present embodiment provides a medium frequency induction heating furnace system for fork processing, including: the feeding mechanism 1 is used for accumulating and placing the pallet fork workpieces and pushing the pallet fork workpieces into the induction heating furnace 2; the induction heating furnace 2 is fixedly arranged at a discharge port at the tail end of the feeding mechanism 1, is matched and connected with a medium-frequency IGBT power supply and is used for carrying out medium-frequency induction heating on the pushed pallet fork workpiece; the discharging mechanism 5 is fixedly arranged at a discharging port of the induction heating furnace 2 and is used for transferring and discharging the heated pallet fork workpiece; the tooling lifting mechanism 4 is fixedly arranged between the induction heating furnace 2 and the discharging mechanism 5 and comprises a gantry lifter 41 and a group of tooling fixtures 42 connected with the gantry lifter 41, the tooling fixtures 42 are used for placing and clamping the pallet fork workpiece, and during work, the gantry lifter 41 drives at least one tooling fixture 42 to ascend or descend so as to place the pallet fork workpiece on the tooling fixture 42 in the cooling tank 3; and the cooling tank 3 is fixedly arranged at the bottom of the tooling lifting mechanism 4, and cooling water is stored in the cooling tank and used for quenching the heated pallet fork workpiece in water.
In this embodiment, the induction heating furnace 2 is connected with the medium frequency IGBT power supply in a matching manner, and is used for performing medium frequency induction heating on the pushed pallet fork workpiece, the medium frequency IGBT power supply controls the heating component of the induction heating furnace 2 to perform constant power output heating, and the induction heating furnace has the advantages of high heating speed, high production efficiency, less oxidation and decarburization, and material and processing cost saving.
Referring to fig. 3, in this embodiment, the feeding mechanism 1 includes a frame a17, a set of stacking roller ways a12 for stacking a fork workpiece is fixedly installed at the top of the frame a17, a feeding platform 11 is fixedly installed at the tail end of the frame a17, a frame B16 is welded above the tail end of the frame a17, a side pushing assembly 13 is fixedly installed on the side surface of the frame B16, during operation, the side pushing assembly 13 pushes a fork handle laterally hung on the fork workpiece to complete positioning of the fork workpiece before lifting, a notch 111 is formed at the front end of the feeding platform 11, at least one set of lifting assembly 14 is arranged in the notch 111, the lifting assembly 14 is fixedly installed on the frame a17, and during operation, the lifting assembly 14 is used for driving the fork workpiece to lift to the height of the feeding platform 11.
In this embodiment, the two chains of the set of accumulation roller bed a12 can be driven to rotate by a set of servo motor or a servo motor cooperating with the transmission shaft, so as to drive the set of accumulation roller bed a12 to rotate for feeding and conveying the pallet fork workpiece, but the set of accumulation roller bed a12 can also be driven by a stepping motor, a gear pump, etc., and details are not described herein.
In this embodiment, the telescopic end of the side pushing assembly 13 is connected with a push plate 131, and when the side pushing assembly 13 works, the push plate 131 can be driven to abut against the outer edge surface of the fork handle of the pallet fork workpiece, so that the side pushing positioning of the pallet fork workpiece before rising is completed.
In this embodiment, the lifting assembly 14 can be selected from, but not limited to, a lifting cylinder or a lifting cylinder, and a top plate is also connected to the telescopic end of the top of the lifting assembly 14, so that in operation, the lifting assembly 14 can drive the top plate to abut against the bottom edge surface of the fork wall of the pallet fork workpiece, and further drive the pallet fork workpiece to rise to the height of the loading platform 11.
Referring to fig. 3, in this embodiment, in order to prevent the fork workpiece conveyed by the accumulation roller bed a12 of the feeding mechanism 1 from deviating, and then the fork workpiece slides off the accumulation roller bed a12, or the fork workpiece impacts the rack a17, which causes damage to the fork workpiece or a component on the rack a17, we further improve the rack a17 of the feeding mechanism 1, that is, a deviation rectifying component for the fork workpiece is arranged on the side of the rack a17 located at the fork handle;
the deviation rectifying assembly comprises a deviation rectifying roller way A19 and a deviation rectifying roller way B18, the deviation rectifying roller ways of the deviation rectifying roller way A19 and the deviation rectifying roller way B18 are arranged on the rack A17 in a face-to-face mode, in the conveying process of the pallet fork workpiece carried out by the accumulation roller way A12, a fork handle of the pallet fork workpiece is located between the deviation rectifying roller way A19 and the deviation rectifying roller way B18, when the pallet fork workpiece conveyed by the accumulation roller way A12 deviates, the deviation rectifying roller way A19 and the deviation rectifying roller way B18 can provide deviation rectifying guidance for the fork handle of the pallet fork workpiece, and therefore the pallet fork workpiece is guaranteed to move towards the tail end of the accumulation roller way A12 in a correct direction posture, and accordingly the subsequent side pushing assembly 13 can conveniently push the fork handle of the pallet fork workpiece, and other working mechanisms can carry out accurate progressive work, and details are omitted here.
Referring to fig. 3, in the embodiment, the feeding mechanism 1 further includes a pushing assembly 15 fixedly mounted on the frame a17, and when the feeding mechanism is in operation, the pushing assembly 15 pushes the fork workpiece to advance toward the inlet 24 at the front end of the induction heating furnace body 2, and finally pushes the fork workpiece into the induction heating furnace 2. In this embodiment, the pushing assembly 15 can be selected but not limited to a forward pushing servo electric cylinder or a forward pushing cylinder, during actual operation, after the fork workpiece is accurately positioned by the side pushing assembly 13, the lifting assembly 14 jacks the fork workpiece to the same height of the loading platform 11, finally, the pushing assembly 15 pushes the fork workpiece to be pushed to the fork workpiece inlet 24 of the induction heating furnace 2, and by analogy, the fork workpiece enters the L-shaped profiling coil furnace body 21 of the induction heating furnace 2, so that the automation degree is high, and the loading efficiency of the fork workpiece is guaranteed.
Referring to fig. 4, in the embodiment, the induction heating furnace 2 includes an L-shaped coil furnace body 21, a support frame 22 is disposed in the L-shaped coil furnace body 21, an electric fuse 23 for intermediate frequency is fixedly mounted at the bottom of the support frame 22, the electric fuse 23 for intermediate frequency is electrically connected to a coil in the L-shaped coil furnace body 21, a fork workpiece inlet 24 is disposed at the front end of the L-shaped coil furnace body 21, a fork workpiece outlet 25 is disposed at the tail end of the L-shaped coil furnace body, a water-cooling stainless steel slideway 26 is further disposed in a heating cavity of the L-shaped coil furnace body 21, and the water-cooling stainless steel slideway 26 can prevent the fork workpiece from directly colliding with the inner surface of the L-shaped coil furnace body 21, so as to damage the L-shaped coil furnace body 21.
It should be noted that, the induction heating furnace 2 of the invention not only can adopt the L-shaped profiling coil furnace body 21, but actually the opposite furnace body basically has no, and the periphery of the coil adopts high-strength and high-temperature-resistant cement, so that the whole furnace body has high strength and good heat preservation effect; of course, the induction heating furnace 2 may be in a generally square or rectangular form and heated by a high, medium, low frequency power supply or the like, but the heating time and the energy consumption are increased, and the hardness performance of the pallet fork workpiece after quenching is unstable, which is not stable as the L-shaped profiling coil furnace body 21 of the present invention.
Referring to fig. 5, in the embodiment, the gantry crane 41 includes a gantry 414, a set of lifting actuators 413 is fixedly mounted on a side surface of the gantry 414, a set of lifting chains 412 is fixedly connected to top telescopic ends of the two lifting actuators 413 respectively, and the two sets of lifting chains 412 are fixedly connected to top ends of two sides of the two tooling fixtures 42 respectively. In this embodiment, the lifting actuator 413 may be, but not limited to, a hydraulic cylinder, an electric lifting rod, or the like, and may also be, as an alternative, a mechanism that winds the lifting chain 412, such as a winch, or the like, which is not described herein in detail.
Referring to fig. 5, in this embodiment, polished rods are respectively and fixedly installed at top ends of two sides of the gantry 414, a set of guide wheels 411 is respectively sleeved on the polished rods, and two sets of hoisting chains 412 are respectively wound on the front and rear position guide wheels 411 of the corresponding sides.
Referring to fig. 5, in this embodiment, the tooling fixture 42 includes a frame body 424, an L-shaped platform 421 is fixedly mounted at a middle position of the frame body 424, a plurality of fork handle pressing pieces 422 are arranged on a side surface of the L-shaped platform 421, a plurality of fork wall pressing pieces 423 are arranged above the L-shaped platform 421, the fork handle pressing pieces 422 and the fork wall pressing pieces 423 are respectively and fixedly mounted on the frame body 424, and during operation, the fork handle pressing pieces 422 and the fork wall pressing pieces 423 respectively press the fork handle and the fork wall of the fork workpiece, so as to prevent the fork workpiece from slipping off the tooling fixture 42. When the sliding trolley 53 takes out the heated pallet fork workpiece from the induction heating furnace 2 and places the pallet fork workpiece on the L-shaped platform 421 in one of the tooling fixtures 42, the fork handle pressing piece 422 and the fork wall pressing piece 423 can quickly press the fork handle and the fork wall of the pallet fork workpiece, so that the gantry crane 41 is prevented from driving the tooling fixture 42 to quickly descend into the cooling tank 3 to perform quenching when the pallet fork workpiece enters water, the pallet fork workpiece slides off the tooling fixture 42, and the deformation of the straight surface of the pallet fork and the inconsistency of the angle are also prevented.
In this embodiment, fork handle compresses tightly piece 422 and fork wall and compresses tightly piece 423 optional but not limited to and compresses tightly hydro-cylinder, compress tightly the module etc. during operation, only need can accomplish the work that compresses tightly fork work piece fork handle and fork wall fast can.
Referring to fig. 6, in this embodiment, the discharging mechanism 5 includes a material taking assembly and a material discharging assembly, the material taking assembly includes a bearing chassis 54, a set of lifters 52 is respectively and fixedly mounted on the left and right sides of the bearing chassis 54, a strip frame 51 is respectively and fixedly connected to the lifting ends at the tops of the two sets of lifters 52, a rack guide rail 56 is fixedly mounted at the tops of the two strip frames 51, a sliding trolley 53 is slidably mounted at the top of the rack guide rail 56, a set of vertical frame 58 is welded at the front end of the top of the sliding trolley 53, a set of material taking fork teeth 55 are welded at the top of the front end of the set of vertical frame 58, the two material taking fork teeth 55 are used for taking out a fork workpiece from the induction heating furnace 2 or the tool clamp 42 under the matching action of the sliding trolley 53 and the two sets of lifters 52, the material discharging assembly includes a rack C57, and a set of stacking roller table B59 for discharging the fork workpiece is fixedly mounted at the top of the rack C57.
In the embodiment of the present invention, the lifter 52 may be, but not limited to, an electric lifter, a hydraulic lifter, etc., and only needs to be able to lift the sliding trolley 53 at the top of the supporting chassis 54 to the height of the pallet fork workpiece in the induction heating furnace 2 and the height of the L-shaped platform 421 in the tooling fixture 42.
In the embodiment of the present invention, the two chains of the accumulation roller bed B59 can be driven to rotate by a set of servo motors or a servo motor cooperating with a transmission shaft, so as to drive the accumulation roller bed B59 to rotate for discharging and conveying the pallet fork workpiece, but the two chains can also be driven by a stepping motor, a gear pump, etc., and will not be described herein in detail.
Referring to fig. 6, in this embodiment, the sliding trolley 53 includes a flat table 533 and a set of driving actuators 531, the flat table 533 is welded to the bottom end of the vertical frame 58, the set of driving actuators 531 is fixedly installed above the flat table 533, a gear engaged with the rack guide rail 56 is installed at an output end of the driving actuators 531, and during operation, the driving actuators 531 drive the gear to rotate so as to drive the flat table 533 to slide on the top of the rack guide rail 56. In this embodiment, the driving executing component 531 may be selected but not limited to a direct current gear motor, a combination of a gear reducer and a motor, a stepping motor, etc., and the driving executing component 531 with a braking function is preferred in the present invention to execute the driving sliding of the sliding trolley 53 on the rack guide rail 56, so as to realize that the two material taking fork teeth 55 at the front end of the sliding trolley 53 take out the fork workpiece from the induction heating furnace 2 or the tooling fixture 42 and finally brake so as to lower the processed fork workpiece on a group of stacking roller ways B59 in the discharging mechanism 5.
Referring to fig. 6, in the present embodiment, a set of limiting wheels 532 is respectively fixedly mounted on the left and right sides of the flat table 533, and the two sets of limiting wheels 532 are respectively connected with the outer edge surfaces of the rack guide rails 56 on the corresponding sides in a sliding and clamping manner. By respectively arranging the limiting wheels 532 on the left side and the right side of the flat bed 533, the limiting wheels 532 can be connected with the outer edge surfaces of the rack guide rails 56 on the corresponding sides in a sliding and clamping manner, so that the sliding trolley 53 is prevented from sliding on the rack guide rails 56, or shifting or overturning occurs in the material taking process of the pallet fork workpiece, and the working stability of the sliding trolley 53 is improved.
The working principle is as follows: firstly, fork workpieces are placed on a stacking roller way A12 of a feeding mechanism 1 by using a fork handle, a stacking chain is driven by a servo motor, and the fork workpieces are automatically conveyed to a position to be fed; the fork is accurately positioned by the side pushing assembly 13, the fork is jacked to the same height of the loading platform 11 by the lifting assembly 14, the fork workpiece is pushed to the fork workpiece inlet 24 of the induction heating furnace 2 by the material pushing assembly 15, and the fork workpiece enters the induction furnace body 2 by analogy;
the pallet forks sequentially enter the induction heating furnace 2, a water-cooled stainless steel slideway 26 is arranged in the induction heating furnace body to prevent pallet fork workpieces from directly colliding with the surface of the induction heating furnace, a heating assembly of the induction heating furnace 2 is controlled by a medium-frequency IGBT power supply to heat, and when the pallet fork workpieces are sequentially pushed to a pallet fork workpiece outlet 25 of the induction heating furnace, the pallet forks are discharged from the furnace and quenched in water;
when discharging, the discharging mechanism 5 is used, the lifting executive component 52 drives the vertical frame 58 to rise to the height of a pallet fork workpiece in the induction heating furnace 2, the executive component 531 is driven to drive the sliding trolley 53 to move forwards, two fork teeth 55 at the front end of the sliding trolley 53 enter a pallet fork workpiece outlet 25 of the induction heating furnace and take out the pallet fork workpiece, the executive component 531 is driven to drive the sliding trolley 53 to move backwards and place in the tool fixtures 42, the L-shaped platform 421 in one of the tool fixtures 42 respectively compresses the pallet fork workpiece by using the fork handle compressing component 422 and the fork wall compressing component 423 and rapidly descends to the cooling tank 3 for water inlet quenching, and so on;
during discharging, the discharging mechanism 5 is utilized again, the lifting executive component 52 drives the stand 58 to rise to the height of the L-shaped platform 421 in one of the tooling fixtures 42, the executive component 531 is driven to drive the sliding trolley 53 to move forward, so that the two fork teeth 55 at the front end of the sliding trolley 53 enter the tooling fixtures 42 and take out a fork workpiece, the executive component 531 is driven to drive the sliding trolley 53 to retreat to a position, the lifting executive component 52 descends to a position, and the fork workpiece is automatically placed on a group of accumulation roller ways B59 in the discharging mechanism 5, so that the processing cycle of a single fork using the medium-frequency induction heating device is completed.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (8)

1. The utility model provides a fork processing is with intermediate frequency induction heating technology, adopts fork processing to carry out the processing operation with intermediate frequency induction heating furnace system, its characterized in that includes following step:
s1, performing accessory welding on the bent pallet fork workpiece;
s2, carrying out weld joint detection on the pallet fork workpiece after the accessory is welded;
s3, stacking the pallet fork workpiece on a stacking roller way of a feeding mechanism by using a forklift, and then conveying the pallet fork workpiece to an L-shaped profiling coil furnace body of the induction heating furnace by the feeding mechanism;
s4, carrying out medium-frequency uniform heating on the pallet fork workpiece in the L-shaped profiling coil furnace body by the induction heating furnace under the control of a medium-frequency IGBT power supply;
s5, transferring the fork workpiece subjected to the heating treatment in the induction heating furnace to a tool clamp of the tool lifting mechanism by using the sliding trolley;
s6, lowering the tooling clamp loaded with the fork workpiece into the cooling tank by the gantry crane of the tooling lifting mechanism so as to carry out water quenching treatment on the fork workpiece on the tooling clamp;
s7, after the water quenching treatment of the pallet fork workpiece is completed, the sliding trolley forks the pallet fork workpiece on the tool clamp and places the pallet fork workpiece on a stacking roller way of a discharging mechanism;
s8, the discharging mechanism finishes discharging and conveying the pallet fork workpiece after medium-frequency induction quenching.
2. The medium frequency induction heating process for fork processing as claimed in claim 1, wherein the speed of feeding the fork workpiece by the feeding mechanism in S3 is 0.5-1 min/piece.
3. The mid-frequency induction heating process for fork processing as claimed in claim 1, wherein the heating temperature of the induction heating furnace in S4 is controlled to be 850-870 ℃.
4. The intermediate frequency induction heating process for processing the pallet fork according to claim 1, wherein the intermediate frequency IGBT power supply in the S4 controls the output power of the intermediate frequency heating of the induction heating furnace to be 500 KW-600 KW.
5. The medium-frequency induction heating process for machining forks of claim 1, wherein in the step S5, at least one tool clamp of the tool lifting mechanism is provided.
6. The medium frequency induction heating process for processing forks of claim 1, wherein the cooling medium in the cooling tank of S6 is normal water, brine or alkaline water.
7. The intermediate frequency induction heating process for fork processing as claimed in claim 1, wherein the intermediate frequency induction heating furnace for fork processing comprises:
the feeding mechanism is used for accumulating and placing the pallet fork workpieces and pushing the pallet fork workpieces into the induction heating furnace;
the induction heating furnace is fixedly arranged at a discharge port at the tail end of the feeding mechanism, is connected with a medium-frequency IGBT power supply in a matched manner and is used for carrying out medium-frequency induction heating on the pushed pallet fork workpiece;
the discharging mechanism is fixedly arranged at a discharging port of the induction heating furnace and is used for transferring and discharging the heated pallet fork workpiece;
the tooling lifting mechanism is fixedly arranged between the induction heating furnace and the discharging mechanism and comprises a gantry crane and tooling fixtures connected with the gantry crane, the tooling fixtures are used for placing and clamping the fork workpieces, and during work, the gantry crane drives at least one tooling fixture to ascend or descend so as to place the fork workpieces on the tooling fixtures in the cooling tank;
and the cooling tank is fixedly arranged at the bottom of the tool lifting mechanism, and cooling water is stored in the cooling tank and used for quenching the heated fork workpiece in water.
8. The medium-frequency induction heating process for fork machining according to claim 7, wherein the induction heating furnace comprises an L-shaped copying coil furnace body, a support frame is arranged in the L-shaped copying coil furnace body, medium-frequency electric melting is fixedly mounted at the bottom of the support frame and is electrically connected with a coil in the L-shaped copying coil furnace body, a fork workpiece inlet is formed in the front end of the L-shaped copying coil furnace body, a fork workpiece outlet is formed in the tail end of the L-shaped copying coil furnace body, and a water-cooling stainless steel slideway is further arranged in a heating cavity of the L-shaped copying coil furnace body.
CN202210392372.8A 2022-04-14 2022-04-14 Intermediate-frequency induction heating process for fork machining Withdrawn CN114717387A (en)

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Application Number Priority Date Filing Date Title
CN202210392372.8A CN114717387A (en) 2022-04-14 2022-04-14 Intermediate-frequency induction heating process for fork machining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210392372.8A CN114717387A (en) 2022-04-14 2022-04-14 Intermediate-frequency induction heating process for fork machining

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CN114717387A true CN114717387A (en) 2022-07-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115821014A (en) * 2022-12-26 2023-03-21 江苏科铭货叉有限公司 Intermediate-frequency induction heating process for fork machining
CN115900344A (en) * 2022-12-19 2023-04-04 江苏科铭货叉有限公司 Intermediate frequency induction heating furnace system for fork processing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115900344A (en) * 2022-12-19 2023-04-04 江苏科铭货叉有限公司 Intermediate frequency induction heating furnace system for fork processing
CN115821014A (en) * 2022-12-26 2023-03-21 江苏科铭货叉有限公司 Intermediate-frequency induction heating process for fork machining

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Application publication date: 20220708