CN112609058A - Local heat treatment device for long-tube workpieces - Google Patents

Local heat treatment device for long-tube workpieces Download PDF

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Publication number
CN112609058A
CN112609058A CN202011451541.8A CN202011451541A CN112609058A CN 112609058 A CN112609058 A CN 112609058A CN 202011451541 A CN202011451541 A CN 202011451541A CN 112609058 A CN112609058 A CN 112609058A
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China
Prior art keywords
workpiece
heating chamber
heat treatment
heating
chamber
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Pending
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CN202011451541.8A
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Chinese (zh)
Inventor
田东庄
董萌萌
温国栋
李鹏
田宏杰
马晓琳
鄢忠方
刘刚
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Xian Research Institute Co Ltd of CCTEG
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Xian Research Institute Co Ltd of CCTEG
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Priority to CN202011451541.8A priority Critical patent/CN112609058A/en
Publication of CN112609058A publication Critical patent/CN112609058A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints

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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 Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a local heat treatment device for long-tube workpieces, which comprises a heating chamber, a cooling chamber, a resistance heating device, a supporting piece, a workpiece hoisting device and a workpiece conveying track, wherein the heating chamber is arranged on the heating chamber; the heating chamber and the cooling chamber are sequentially supported on the supporting piece in a suspended mode, the side portion and the bottom portion of the heating chamber are respectively provided with a side opening and a bottom opening for the workpiece to enter and exit, the side opening is provided with a movable heat insulation piece, and the resistance heating device is arranged on the inner wall of the heating chamber; both sides and the bottom of the cooling chamber are open, and a spray head is arranged in the cooling chamber; the workpiece hoisting device comprises a cantilever and a clamping piece, one end of the cantilever is connected to the workpiece conveying track, and the other end of the cantilever is connected with the clamping piece. Local heating and heat preservation are adopted, the whole workpiece does not need to be placed into a heat treatment device, the size of the device is effectively reduced, and the energy consumption is reduced; the heating uniformity of the workpiece and the accuracy of the heating and heat-preserving time of the workpiece are ensured, and the problem that the workpieces of the traditional trolley-type tempering furnace are stacked together and heated unevenly is avoided.

Description

Local heat treatment device for long-tube workpieces
Technical Field
The invention belongs to the technical field of heat treatment of pipe workpieces, and relates to a local heat treatment device for long pipe workpieces.
Background
In many industries, the use of long pipe workpieces is indispensable, and in practical conditions, the mechanical property requirement of the pipe fitting is high only in part, and the mechanical requirement of the rest part can be met only in a supply state. In addition, many long pipe workpieces are formed by friction welding two different materials of steel into a whole, such as a drill pipe joint and a rod body in the petroleum industry and the coal industry, and the welding seam needs tempering treatment for reducing the processing hardness, improving the plasticity and eliminating the residual stress. However, the heat treatment furnace for locally tempering the long pipes has fewer suitable furnaces in actual production.
At present, enterprises mainly use a trolley type tempering furnace, long pipe workpieces with the same specification are hung into the tempering furnace by taking a group as a unit, heat energy is transferred to the workpieces through convection heat circulation in the furnace, but because the group workpieces and the batch workpieces are closely contacted with each other, the internal convection effect is poor, the whole batch of workpieces are heated unevenly, the contact area between the outer ring of the stacked workpieces and convection air is large, the required temperature is reached earlier, and the heat preservation time of partial workpieces is overlong; in addition, because the opening is formed in the furnace top, the lifting appliance extends into the furnace from the furnace top, and the workpiece is heated in the furnace along with the lifting appliance and is transported to the outlet, hot air with low density escapes from the furnace top, a large amount of heat energy is lost, and the energy conservation and environmental protection are poor; in the aspect of safety, personnel can be radiated by high temperature in the hoisting process. In addition, domestic and foreign enterprises widely use intermediate frequency induction local heating, but the heating principle requires high centering precision between a workpiece and a coil center, otherwise, the heating temperature of the workpiece is not uniform, and in addition, the intermediate frequency induction heating is suitable for a quenching process, and the required temperature can be reached, for example, when the intermediate frequency induction heating is used for a tempering process, the energy consumption is too large in a heat preservation stage (long time).
Disclosure of Invention
In order to solve the problems, the invention provides a local heat treatment device for long tubular workpieces, which solves the problems of high energy consumption and nonuniform heating of the existing long tubular workpieces.
In order to solve the technical problems, the invention adopts the following technical scheme:
a local heat treatment device for long-tube workpieces comprises a heating chamber, a cooling chamber, a resistance heating device, a supporting piece, a workpiece hoisting device and a workpiece conveying track;
the heating chamber and the cooling chamber are sequentially supported on the supporting piece in a hanging mode, a side opening for the workpiece to enter and exit is formed in the side portion of the heating chamber, a movable heat insulation piece is arranged at the side opening, and a bottom opening for the workpiece to move is formed in the bottom of the heating chamber; the resistance heating device is arranged on the inner wall of the heating chamber; the two sides and the bottom of the cooling chamber are open, and a spray head is arranged in the cooling chamber; the workpiece hoisting device comprises a cantilever and a clamping piece used for clamping a workpiece, one end of the cantilever is connected to the workpiece conveying track, and the other end of the cantilever is connected with the clamping piece.
Specifically, the bottom opening part is provided with mobilizable baffle unit, and every baffle unit comprises two baffles of opening central symmetry setting along the bottom, and every baffle one end is through the round pin hub connection in the bottom of heating chamber, and can wind the round pin hub rotation, the baffle other end passes through spring (105) and connects in the bottom of heating chamber.
Preferably, the baffle is provided with a section of convex arc-shaped edge.
Specifically, the heat insulation piece is a heat insulation curtain.
Specifically, the cantilever comprises a C-shaped arm and a roller arranged at one end of the C-shaped arm, and the other end of the C-shaped arm is connected with the clamping piece; the roller is clamped on the workpiece conveying rail and moves along the workpiece conveying rail.
Specifically, the cross section of the workpiece conveying rail is I-shaped, and the rollers are symmetrically clamped between the upper flange and the lower flange of the workpiece conveying rail.
Specifically, the support frame is a triangular support frame, and the support frame is arranged on two sides of the heating chamber.
Further, the device also comprises a traction chain, and the cantilever is connected with the traction chain.
Furthermore, a temperature sensor is arranged in the heating chamber, and the temperature sensor (8) and the resistance heating device are respectively connected with a temperature controller.
Further, the device comprises two groups of heat treatment units, wherein each heat treatment unit comprises at least one heating chamber and one cooling chamber; the workpiece conveying track is integrally annular, the two groups of heat treatment units are arranged on the workpiece conveying track, and a workpiece loading and unloading robot and a workpiece rotating robot are respectively arranged between the two groups of heat treatment units.
Compared with the prior art, the invention has the beneficial effects that:
the device adopts the heat treatment device with a lifting type matching design, the openings of the heating chamber and the cooling chamber are downward, and because the density of hot air is lower than that of cold air, and most of the hot air is left at the position of the furnace top, the loss of certain heat can be avoided; in addition, due to local heating and heat preservation, the whole workpiece does not need to be placed into a heat treatment device, so that the volume of the device is effectively reduced, and the energy consumption is reduced;
because the workpieces are locally heated in a hoisting mode, the distance between the workpieces is about 50-100 mm, the heating uniformity of the workpieces and the accuracy of the heating and heat-preserving time of the workpieces are guaranteed, and the problem that the workpieces of a traditional trolley type tempering furnace are stacked together and heated unevenly is solved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
FIG. 1 is a schematic view of a heating chamber of a heat treatment apparatus according to an embodiment of the present invention.
FIG. 2 is a side view of a heating chamber of a heat treatment apparatus according to an embodiment of the present invention.
Fig. 3 is a plan view of a heating chamber baffle unit of the heat treatment apparatus according to the embodiment of the present invention.
FIG. 4 is a side view of a cooling chamber of a heat treatment apparatus according to an embodiment of the present invention.
FIG. 5 is a schematic view of a production line of a heat treatment apparatus according to an embodiment of the present invention.
Fig. 6 is a simulation result of the internal temperature field of the heating chamber after the heating balance is stabilized.
FIG. 7 is an actual temperature distribution diagram corresponding to a plurality of temperature points at different heights in the heating chamber.
The reference numerals in the figures denote:
1-a heating chamber, 2-a cooling chamber, 3-a resistance heating device, 4-a support, 5-a workpiece hoisting device, 6-a workpiece conveying track, 7-a traction chain, 8-a temperature sensor, 9-a workpiece, 10-a heat treatment unit, 11-a workpiece loading and unloading robot, and 12-a workpiece rotating robot;
101-side opening, 102-bottom opening, 103-insulation, 104-baffle, 105-spring, 106-arc edge;
501-cantilever, 502-clamp, 503-C-arm, 504-C-link, 505-roller.
The details of the present invention are explained in further detail below with reference to the drawings and the detailed description.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
In the present invention, unless otherwise specified, the use of the terms of orientation such as "upper, lower, bottom, top" and "lower" generally refer to the definition in the drawing plane of the corresponding drawing, and "inner and outer" refer to the definition in the drawing plane of the corresponding drawing.
The invention discloses a local heat treatment device for long-tube workpieces, as shown in fig. 1 to 3, the local heat treatment device of the embodiment comprises a heating chamber 1, a cooling chamber 2, a resistance heating device 3, a support member 4, a workpiece hoisting device 5 and a workpiece conveying rail 6, wherein the resistance heating device 3 is arranged in the heating chamber 1 and used for carrying out layout heating on the workpieces, the cooling chamber 2 is used for carrying out water cooling on the workpieces 9 subjected to heat preservation to finish the last process of tempering, the support member 4 is used for supporting the heating chamber 1 and the cooling chamber 2, the workpiece hoisting device 5 is used for clamping the workpieces 9 and suspending and clamping the workpieces 9, and the workpiece conveying rail 6 is used for enabling the workpiece hoisting device 5 to move along the rail.
Specifically, the heating chamber 1 and the cooling chamber 2 are sequentially supported on the support 4 in a suspended manner, the side portion and the bottom portion of the heating chamber 1 are respectively provided with a side opening 101 for the workpiece to enter and exit and a bottom opening 102 for the workpiece 9 to move, wherein the side openings 101 are arranged on two symmetrical side surfaces of the heating chamber 1, and the bottom opening 102 extends along the moving direction of the workpiece 9, so that the heating chamber 1 is integrally of an inverted concave structure with a downward opening. The heating chamber of the present embodiment has a rectangular parallelepiped structure, and the bottom surface and the short side surfaces of the rectangular parallelepiped structure are open, forming a bottom opening 102 and a side opening 101.
In order to improve the heat preservation effect in the heating chamber 1, a movable heat insulation member 103 is provided at the side opening 101 at both sides, the heat insulation member 103 is opened when the workpiece 9 enters or exits, and the heat insulation member 103 is closed after the workpiece 9 enters. The heat insulating material 103 of the present embodiment is preferably a heat insulating curtain, but may be other members or heat insulating means capable of performing heat insulation. For preventing convection from being formed inside the heating chamber 1, resulting in loss of heat energy.
The step of loading and unloading the work pieces a plurality of times can be avoided by providing the cooling chamber 2 after the heating chamber 1, and specifically, the cooling chamber 2 of the present embodiment is also open at both sides and at the bottom for the work pieces 9 to be loaded and unloaded, and is provided with openings at the bottom and both symmetrical sides similarly to the shape of the heating chamber 1. Be provided with shower head 201 in cooling chamber 2, shower head 201 evenly is provided with a plurality ofly around cooling chamber inner wall circumference, forms the cooling water curtain, and water circulative cooling effect is good, as shown in fig. 4, shower head 201 sets up on top and lateral wall in this embodiment. It should be noted that the cooling chamber 2 is spaced apart from the heating chamber 1 by a certain distance, so as to avoid the influence of the cooling chamber 2 on the temperature of the heating chamber 1.
The resistance heating device 3 of this embodiment sets up on the inner wall of heating chamber 1, and is concrete, and on the resistance heating device 3 embedding heating chamber inner wall, the resistance heating device 3 of this embodiment covers the shell type far infrared heater by six and constitutes, installs on the inner wall of heating chamber 1 both sides, and the temperature field distribution numerical simulation through required temperature of specific position of arranging needs is designed and is verified.
The support frame 4 of the present embodiment is specifically a triangular support frame, as shown in fig. 2, preferably a right-angled triangular support frame, the support frame 4 is arranged on both sides of the heating chamber 1, specifically, the top tip of the support frame is fixed on the side wall of the heating chamber 1 through bolts.
The workpiece hoisting device 5 comprises a cantilever 501 and a clamping piece 502 used for clamping workpieces, one end of the cantilever 501 is connected to the workpiece conveying track 6, the other end of the cantilever 501 is connected with the clamping piece 502, and the clamping piece 502 can adopt self-locking pneumatic clamping jaws existing on the market, so that the workpieces 9 are prevented from falling off and equipment failure is prevented. It should be noted that the center of gravity of the workpiece hoisting device 5 is located on the perpendicular bisector of the workpiece conveying track 6, so that the hoisted workpiece is ensured to be kept in a vertical state.
As shown in fig. 2, the cantilever 501 of the present embodiment includes a C-shaped arm 503 and a roller 505 disposed at one end of the C-shaped arm 503, specifically, a C-shaped connecting member 504 is connected to one end of the C-shaped arm 503, the C-shaped arm 503 has an opening facing in the horizontal direction, and the C-shaped connecting member 504 has an opening facing upwards. The inner walls of the two sides of the opening of the C-shaped connecting member 504 are respectively provided with a roller 505, more specifically, the inner walls are processed with a short shaft, and the rollers 505 are mounted on the short shaft. The other end of the C-shaped arm 503 is connected to a clamp 502, and a roller 505 is clamped on the workpiece conveying rail 6 and moves along the workpiece conveying rail 6.
The workpiece conveying rail 6 of the present embodiment has an i-shaped cross section, and the rollers 505 are symmetrically clamped between the upper and lower flanges of the workpiece conveying rail 6.
As a preferred aspect of the present invention, a movable shutter unit is provided at the bottom opening 102 of the heating chamber 1 to prevent a large heat loss during the heat-insulating period. Specifically, as shown in fig. 3, each baffle plate unit is composed of two baffle plates 104 arranged along the center of the bottom opening 102 symmetrically, one end of each baffle plate 104 is connected to the bottom of the heating chamber 1 through a pin (not shown) and can rotate around the pin, and the other end of the baffle plate 104 is connected to the bottom of the heating chamber 1 through a spring 105. After the workpiece 9 enters the bottom opening 102, the baffle plates 104 on two sides are extruded to rotate around the pin shaft, the other ends of the baffle plates 104 extrude the springs 105, and after the workpiece 9 leaves, the baffle plates 104 on two sides are restored under the resilience action of the springs 105, so that the dissipation of the temperature in the heating chamber 1 can be blocked. A plurality of sets of baffle units are provided along the moving direction of the workpiece 9, covering the bottom opening 102 of the entire heating chamber 1.
More preferably, the surface of the baffle 104 is coated with a reflective material to effectively prevent heat radiation.
More preferably, the baffle 104 is provided with a convex arcuate edge 106. Specifically, the flap 104 includes three sides, two straight sides and an arcuate side 106, the two straight sides forming a tip that is connected to the pin, and the spring 105 is attached near one of the straight sides that is adjacent to the arcuate side. The arc-shaped edge 106 can effectively prevent the baffle plate 104 and the workpiece 9 from interfering and even locking in the process of mutual movement, and the operation of the device is influenced.
As another embodiment of the present invention, on the basis of the above embodiment, a traction chain 7 is further provided, the traction chain 7 is connected to the cantilever 501, the hoisting device 5 is driven to move by the traction chain 7, and specifically, the traction chain 7 is fixed near the connection position of the C-shaped arm 503 and the C-shaped connecting member 504.
As another embodiment of the invention, a temperature sensor 8 is arranged in the heating chamber to monitor the temperature in the heating chamber 1, and the temperature sensor 8 and the resistance heating device 3 are respectively connected with a temperature controller, so that the temperature of the heating part of the workpiece can be accurately controlled, and overheating or insufficient temperature can be avoided. The temperature sensor 8 of the present embodiment is a thermocouple sensor, and is installed in the heating chamber 1 near a local heating position of the workpiece 9.
As another embodiment of the present invention, when both ends of a workpiece need to be heat-treated, in order to implement an automated production process, reduce manual hoisting, and improve the efficiency of heat treatment of the workpiece, as shown in fig. 5, the apparatus is provided with two sets of heat treatment units 10, each heat treatment unit 10 includes at least one heating chamber 1 and one cooling chamber 2, the workpiece conveying rail 6 is generally circular, and the two sets of heat treatment units 10 are disposed on the workpiece conveying rail 6, wherein the cooling chamber 2 of the first heat treatment unit is adjacent to the heating chamber 1 of the other heat treatment unit, and a workpiece handling robot 11 and a workpiece rotating robot 12 are disposed between the two sets of heat treatment units 10, respectively, wherein the workpiece handling robot 11 is used for grabbing the workpiece 9, and the overturning robot 12 is used for overturning the workpiece 9. After the workpiece 9 comes out of the cooling chamber 2 of one heat treatment unit, the rotary robot 12 turns the workpiece 180 degrees, and then enters the heating chamber 1 of the other heat treatment unit to perform heat treatment on the other end of the workpiece 9. Therefore, the device can continuously process a plurality of workpieces 9 at one time, and each workpiece can be heated and cooled to finish tempering heat treatment at one end only by clamping once, so that the production efficiency is improved.
The following describes the heat treatment process of the present invention in detail with reference to the above embodiment of the automated manufacturing apparatus:
clamping a workpiece 9 by using a clamping piece 502 of a workpiece hoisting device 5, driving a traction chain 7 to move, driving the workpiece hoisting device 5 and the workpiece 9 to enter a heating chamber 1 along a workpiece conveying track 6, heating a welding seam or a part needing to be heated on the workpiece 9 by using a resistance heating device in the heating chamber 1, wherein the conveying speed is determined by the total length of the heating chamber 1 in a heating unit 10 and the heating and heat-preserving time, conveying one end of the workpiece to a cooling chamber 2 after heating and heat-preserving, and performing water cooling by using a spray header 201 to finish tempering heat treatment on one end; a plurality of work pieces can be hoisted by a plurality of work piece hoisting devices 5 and enter the heating chamber 1 in sequence, the distance between adjacent work pieces is about 50-100 mm, and a plurality of work pieces can be processed simultaneously.
When the other end of the workpiece is required to be heat-treated, the workpiece is continuously conveyed to the station of the workpiece rotating robot 12, the station sensor receives signals and acts to turn the workpiece 180 degrees, and the workpiece is continuously clamped by the workpiece hoisting device 5 and conveyed into the other heat treatment unit 10 to carry out heat treatment on the other end of the workpiece.
Experimental part:
(1) energy consumption:
when the apparatus of the present invention and the conventional bogie hearth type tempering furnace were used to heat-treat 2m or 3m drill rods, respectively, it was found that: the device disclosed by the invention has the advantages that the power consumption for heat treatment of a single drill rod is 3-4 degrees, the power consumption for heat treatment of the trolley type tempering furnace is 5-7 degrees, and the device disclosed by the invention has obviously lower energy consumption.
(2) Simulation of a temperature field in a heating chamber:
the distribution of the temperature field of the heating chamber of the invention is simulated and analyzed by using finite element software ABAQUS, and as shown in figure 6, the distribution of the internal temperature field of the heating chamber after the heating is balanced and stable is shown. Y in FIG. 61,Y2,Y3The three points are the temperatures of different positions from the top to the bottom in the same vertical direction of the heating chamber, which are 585.4 ℃, 577.1 ℃ and 553.1 ℃, respectively, and the temperature gradient formed by the temperature field in the heating chamber from the top to the furnace mouth at the bottom can be seen, the temperature value range is 520 ℃ and 600 ℃, and the temperature value Y is Y1Point and Y2The point temperature difference is within 10 ℃, and the requirement of welding seam tempering is met.
In order to verify the simulation result, temperature measurement points are set at the positions corresponding to the simulation results Y1, Y2 and Y3 in the actual heat treatment device, and three temperature measurement points are set at the same height (for example, the temperature measurement points corresponding to Y1 are X11, X12 and X13). A class I K type thermocouple is used, and a multichannel temperature recorder is used for measuring to obtain temperature distribution graphs corresponding to three temperature measuring points Y1, Y2 and Y3, as shown in figure 7, and the curve of each day in figure 7 represents the temperature change of one temperature measuring point along with the time. As can be seen from FIG. 7, after the tempering furnace temperature area is stabilized, the average temperature of the isothermal surfaces of the three temperature measuring points after the furnace temperature is heated to a steady state is substantially consistent with the result of the numerical simulation, which shows that the device of the present invention has reasonable design and the technician can place the workpiece at the optimal position of the tempering temperature field according to the temperature distribution diagram.
In the above description, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be understood broadly, and may be, for example, fixedly connected or detachably connected or integrated; either a direct connection or an indirect connection, and the like. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
The respective specific technical features described in the above-described embodiments may be combined in any suitable manner without contradiction as long as they do not depart from the gist of the present invention, and should also be regarded as being disclosed in the present invention.

Claims (10)

1. A local heat treatment device for long-tube workpieces is characterized by comprising a heating chamber (1), a cooling chamber (2), a resistance heating device (3), a support piece (4), a workpiece hoisting device (5) and a workpiece conveying track (6);
the heating chamber (1) and the cooling chamber (2) are sequentially supported on the supporting piece (4) in a suspended mode, a side opening (101) for allowing a workpiece to enter and exit is formed in the side portion of the heating chamber (1), a movable heat insulation piece (103) is arranged at the position of the side opening (101), and a bottom opening (102) for allowing the workpiece (9) to move is formed in the bottom of the heating chamber (1); the resistance heating device (3) is arranged on the inner wall of the heating chamber (1);
the two side parts and the bottom part of the cooling chamber (2) are open, and a spray head (201) is arranged in the cooling chamber (2);
the workpiece hoisting device (5) comprises a cantilever (501) and a clamping piece (502) used for clamping a workpiece, one end of the cantilever (501) is connected to the workpiece conveying track (6), and the other end of the cantilever (501) is connected to the clamping piece (502).
2. The apparatus for locally heat-treating long tubular workpieces according to claim 1, wherein a movable baffle unit is arranged at the bottom opening (102), each baffle unit is composed of two baffles (104) arranged symmetrically along the center of the bottom opening (102), one end of each baffle (104) is connected to the bottom of the heating chamber (1) through a pin shaft and can rotate around the pin shaft, and the other end of each baffle (104) is connected to the bottom of the heating chamber (1) through a spring (105).
3. The device for locally heat-treating long tubular workpieces according to claim 2, characterized in that the baffle plate (104) is provided with a segment of outwardly convex arc-shaped edge (106).
4. The device for the localized heat treatment of long tubular workpieces according to claim 1, wherein said thermal insulation (103) is a thermal curtain.
5. The long tubular workpiece local heat treatment device according to claim 1, characterized in that the cantilever (501) comprises a C-shaped arm (503) and a roller (505) arranged at one end of the C-shaped arm (503), and the clamping member (502) is connected to the other end of the C-shaped arm (503); the roller (505) is clamped on the workpiece conveying track (6) and moves along the workpiece conveying track (6).
6. The device for locally heat-treating long tubular workpieces as claimed in claim 5, characterized in that the workpiece conveying rail (6) is I-shaped in cross section, and the rollers (505) are symmetrically clamped between the upper and lower flanges of the workpiece conveying rail (6).
7. The device for locally heat-treating long tubular workpieces according to claim 1, wherein the support frame (4) is a triangular support frame, and the support frame (4) is arranged on both sides of the heating chamber (1).
8. The device for locally heat-treating long tubular workpieces according to claim 1, further comprising a drag chain (7), wherein the cantilever (501) is connected with the drag chain (7).
9. The device for locally heat-treating long tubular workpieces according to claim 1, characterized in that a temperature sensor (8) is arranged in the heating chamber (1), and the temperature sensor (8) and the resistance heating device (3) are respectively connected with a temperature controller.
10. The device for the localized heat treatment of long tubular workpieces according to claim 1, characterized in that it comprises two sets of heat treatment units (10), each heat treatment unit (10) comprising at least one heating chamber (1) and one cooling chamber (2); the workpiece conveying track (6) is integrally annular, two groups of heat treatment units (10) are arranged on the workpiece conveying track (6), and a workpiece loading and unloading robot (11) and a workpiece rotating robot (12) are respectively arranged between the two groups of heat treatment units (10).
CN202011451541.8A 2020-12-10 2020-12-10 Local heat treatment device for long-tube workpieces Pending CN112609058A (en)

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Application Number Priority Date Filing Date Title
CN202011451541.8A CN112609058A (en) 2020-12-10 2020-12-10 Local heat treatment device for long-tube workpieces

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Application Number Priority Date Filing Date Title
CN202011451541.8A CN112609058A (en) 2020-12-10 2020-12-10 Local heat treatment device for long-tube workpieces

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CN112609058A true CN112609058A (en) 2021-04-06

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1341758A (en) * 2001-08-27 2002-03-27 江苏省机电研究所 Piling suspension chain workpiece heat treatment production line
CN205347520U (en) * 2015-12-24 2016-06-29 湖南力升轧辊有限公司 Long -pending suspension type heat treatment line of putting
CN110512197A (en) * 2019-07-31 2019-11-29 中国航发南方工业有限公司 The heating equipment and method of the local heat treatmet of flexible elongated shaft class Flexible Deforming Parts
CN111141154A (en) * 2020-01-15 2020-05-12 马钢轨道交通装备有限公司 Online temperature monitoring system and monitoring method for heated body of heat treatment furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1341758A (en) * 2001-08-27 2002-03-27 江苏省机电研究所 Piling suspension chain workpiece heat treatment production line
CN205347520U (en) * 2015-12-24 2016-06-29 湖南力升轧辊有限公司 Long -pending suspension type heat treatment line of putting
CN110512197A (en) * 2019-07-31 2019-11-29 中国航发南方工业有限公司 The heating equipment and method of the local heat treatmet of flexible elongated shaft class Flexible Deforming Parts
CN111141154A (en) * 2020-01-15 2020-05-12 马钢轨道交通装备有限公司 Online temperature monitoring system and monitoring method for heated body of heat treatment furnace

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