CN101331009A - An arrangement and a method for heating metal objects - Google Patents
An arrangement and a method for heating metal objects Download PDFInfo
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- CN101331009A CN101331009A CNA2006800470551A CN200680047055A CN101331009A CN 101331009 A CN101331009 A CN 101331009A CN A2006800470551 A CNA2006800470551 A CN A2006800470551A CN 200680047055 A CN200680047055 A CN 200680047055A CN 101331009 A CN101331009 A CN 101331009A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 75
- 239000002184 metal Substances 0.000 title claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005259 measurement Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000266 injurious effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
- B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
- F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
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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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
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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
- C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
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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
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/243—Endless-strand conveyor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/38—Arrangements of devices for charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/39—Arrangements of devices for discharging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/0014—Devices for monitoring temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Optics & Photonics (AREA)
- Combustion & Propulsion (AREA)
- Tunnel Furnaces (AREA)
- Furnace Details (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Articles (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an arrangement and a method for heating metal objects such as metal bars by convection. The metal objects are passed on a conveyor through a series of chambers where hot air is blown through the conveyor. The temperature is controlled by a sensor connected to a control devise such as a thyristor.
Description
Technical field
Present invention relates in general to the field of heating metal objects, particularly, this object is elongated metallic rod.
Background technology
Process operation on object before, heating metal objects is known practice.For example, at United States Patent (USP) 4,343, a kind of method of utilizing heater coil at heating pole on the regional area of pole length is disclosed in 209.This bar with advance the gradually length of a workpiece of specific interval with increasing, and cutter arrives by heater coil.Each of bar increase gradually advance after, on the heating region that occurs then, shear a workpiece from the end of bar.Disclosed method can be sheared under the situation that does not have tangible crackle or breakage.
The purpose of this invention is to provide a kind of device of improvement of heating metal objects and the method for improvement, so that cut off metal object easily.The device of this improvement can be used to heat the metal object that then will be cut off than small workpiece with the method for improvement.
Summary of the invention
The present invention relates to a kind of device of heating metal objects.The inventive system comprises the shell that surrounds the inner space.This shell has entrance and exit.In this shell, inwall is divided into back cavity, at least one intermediate cavity and ante-chamber with the inner space.One permeable conveyer belt extends to the outlet of shell by back cavity, intermediate cavity and ante-chamber from the inlet of shell.Like this, the object that is loaded on the conveyer belt can be carried by the chamber.In at least one intermediate cavity, fan is set, guides gas stream into conveyer belt and the object that is positioned on the conveyer belt.In this intermediate cavity, also dispose heating element heater.Before gas arrived conveyer belt, this heating element heater can heat from the fan effluent air.These chambeies are connected to each other, and make at least one outlet of at least one intermediate cavity be communicated with back cavity, and at least one outlet of this intermediate cavity is communicated with ante-chamber, and at least one inlet of this intermediate cavity is communicated with the outlet of back cavity and ante-chamber.Like this, the work of fan will produce gas rear circulation and twice forward circulation by the gas of conveyer belt by conveyer belt twice.
In one embodiment, temperature sensor is placed in this shell, and is connected with the temperature controlling device of control heating element heater, the function of the value that the temperature of this heating element heater is indicated as nominal value with by temperature sensor.Temperature sensor can be placed in the ante-chamber, between the outlet of conveyer belt and ante-chamber.
In certain embodiments, this device comprise be configured to the vertically extending many rows of the direction of motion of conveyer belt in a plurality of fans and a plurality of heating element heater.Can place one in the heater back and cut off device.This shearing device cuts off the metal object that is heated by this heater.
The invention still further relates to a kind of method of heating metal objects.This method comprises the inner space of metal object by being surrounded by shell and be divided into back cavity, at least one intermediate cavity and ante-chamber by inwall that makes on permeable conveyer belt.When conveyer belt passed through at least one intermediate cavity, air was heated, and the air of heating blows through conveyer belt.In at least one intermediate cavity, the first of the air of the heating by conveyer belt is converted to the rear circulation of air.The rear circulation of air is by the conveyer belt in back cavity and be back at least one intermediate cavity.The second portion of the air of the heating by at least one intermediate cavity is converted to the forward circulation of air.The forward circulation of air is by the conveyer belt in ante-chamber and turn back at least one intermediate cavity.
In one embodiment of the invention, the temperature of air is measured by portion in the enclosure, and controls the heating of air as the function of nominal value and measured value.The suitable nominal value of temperature can be 70 ℃.If the measurement temperature can be carried out on the position of measurement air themperature in ante-chamber after air is by the conveyer belt in the ante-chamber.
In a preferred embodiment, utilize the heater be placed at least one intermediate cavity to add hot-air, and the temperature of heater remained in 200 ℃-300 ℃ the scope.
Metal object is elongated metallic rod.The heating process back can be follow-up operation (for example cutting off metallic rod).Heating process itself can think to heat and cut off the part of the method for metallic rod.
Description of drawings
Fig. 1 is the schematic cross section according to heater of the present invention;
Fig. 2 is the cross-sectional view of the II-II line in Fig. 1;
Fig. 3 is the schematic diagram of shearing device;
Fig. 4 represents the work of shearing device shown in Figure 3;
Fig. 5 is the schematic cross section according to the heater of another embodiment.
The specific embodiment
Referring to Fig. 1, the present invention relates to a kind of device 1 of heating metal objects 19, particularly as the operation in advance of before follow-up cut-out operation, carrying out.In the embodiment shown in fig. 1, metal object (for example elongated bar) 19 is placed in the storage library 20.Metal object 19 can be loaded on the conveyer belt 17, and carry by heater 1.In order to distribute object (for example elongated bar) 19 from storage library 20, storage library 20 can have one or several flexible element 37, and the metal object in storage library 20 is placed on this flexible element.If flexible element 37 is shortened, then liftable bar 19, gravity will make bar 19 drop on the conveyer belt 17.This flexible element 37 can for example be one or several belt 37, by with the end of belt 37 (not shown) on the spool, can make belt shorter.In the embodiment shown in fig. 1, conveyer belt 17 has tooth 18, can make to the transmission of conveyer belt more reliably, also can make bar 19 spaced-apart on conveyer belt 17.
Heater 1 comprises the shell 2 that surrounds inner space 3.This shell 2 has inlet 4 and outlet 5.In shell 2, inwall 6,7 is divided into back cavity 8, at least one intermediate cavity 9 and ante-chamber 10 with inner space 3.Conveyer belt 17 is to see through air and outlet 5 extend to shell 2 by back cavity 8, intermediate cavity 9 and ante-chamber 10 from the inlet 4 of shell 2.Like this, the object 19 that is loaded on the conveyer belt 17 can be delivered to outlet 5 by chamber 8,9,10 from entering the mouth 4.In the embodiment in figure 1, conveyer belt is beyond the both sides of shell 2 extend to shell 2.Conveyer belt 17 back are the shearing device of schematically representing in Fig. 1 31.Behind the heating metal objects in heater 1 (for example elongated bar) 19, this slightly softer, and can more easily be cut off device 31 and be cut into less workpiece.
In at least one intermediate cavity 9, place fan 21, guide air stream (or possible another kind of gas stream) into conveyer belt 17 and the object 19 that is placed on the conveyer belt 17.Heating element heater 22 in intermediate cavity 9 is arranged for the air that heating is flowed out from fan 21 before air arrives conveyer belt 17.In the embodiment shown in fig. 1, fan 21 is by driving for the motor M of motor M.Preferably, motor M is in fan 21 is placed on intermediate cavity 9.
In one embodiment, temperature sensor 25 is positioned at shell 2 and is connected with control device 26, and control device 26 control is as nominal value with by the temperature of the heating element heater 22 of the function of the value of temperature sensor 25 indications.Preferably, in the ante-chamber 10 of temperature sensor 25 between the outlet 16 of conveyer belt 17 and ante-chamber 10, but also can be positioned at its other party, for example be arranged in intermediate cavity.Heating element heater 22 for example can be electric coil.
As shown in Figure 2, the embodiment of device of the present invention can comprise a plurality of fans 21 and a plurality of heating element heater 22 that is configured among the many rows that vertically extend with the direction of motion of conveyer belt 17.In the embodiment of a reality of the present invention, this device can comprise 12 fans 21 and 12 heating element heaters 22.In the embodiment of reality, the power of each heating element heater 22 is approximately 3500W.Utilize 12 heating element heaters, the power of whole heater can reach 42KW.
Device of the present invention is worked as follows.Metal object 19 on permeable conveyer belt 17 passes through by the inner space 3 of shell 2 encirclements and the chamber 8,9,10 of inner space.In Fig. 1, metal object 19 moves to the right by inner space 3 from the left side on the direction of arrow A.When conveyer belt 17 passed through intermediate cavity 10, fan 21 blowed to air permeable conveyer belt 17 and blows through conveyer belt 17.Before air arrived conveyer belt 17, air can be heating element heater 22 heating of electrical heating elements 22.When the air of heating passed through conveyer belt 17, metal object 19 was by air heat.Permeable conveyer belt 17 be loaded in this conveyer belt on object 19 as choke valve, when air when the conveyer belt 17, force air to increase its speed.The increase of air velocity can be improved to the heat transmission of metal object 19.In the embodiment of reality, when hot-air passed through conveyer belt 17, the speed of air can be about 8-10m/s.Preferably, the choke valve that except the choke valve of conveyer belt 17 representatives, does not have other.In other parts of system, flowing of air can be slower, to reduce the loss that is caused by friction.In the embodiment of a reality of the present invention, in the downstream of fan 21, the speed of air can be approximately 4m/s.
When hot-air passes to metal object 19 by conveyer belt 17 and with the one partial heat energy, the first of the air of heating is converted to the rear circulation RA of air, this rear circulation passes to back cavity 8, by the conveyer belt in back cavity 8 17 and be back at least one intermediate cavity 9.The second portion of the air of the heating by the conveyer belt in intermediate cavity 9 17 is converted to the forward circulation FA of air, and when conveyer belt 17 during by ante-chamber 10, this forward circulation passes to ante-chamber 10 and by conveyer belt 17.Then, will return to intermediate cavity 9 at the air among the forward circulation FA of air.
Preferably, the motor M with fan 21 is placed in the shell 2 of device.The outside that motor M is positioned shell 2 can make design more complicated.If motor M is a motor, must anticipate in fact that then when uprising as if environment temperature, motor can be out of order or damage.For the motor that has at present known to the inventor, environment temperature preferably is no more than 70 ℃.In a preferred embodiment of the invention, the temperature of air is measured in shell 2, and the heating of air is controlled as the function of nominal value and measured value.In the embodiment shown in fig. 1, temperature sensor 25 is placed in the ante-chamber 10 of contiguous conveyer belt 17, makes before air arrives fan 21 again, by behind the conveyer belt 17, measures the temperature of air for the last time.Though temperature sensor 25 can be positioned at other place, it is suitable that this certain location can be thought, because before air arrives fan 21 once more, the temperature of air can not change a lot from this point.Other suitable positions of sensor 25 can be the downstream of the FA that more forwardly circulates, promptly more close fan 21.Like this, the position of sensor 25 can in the ante-chamber 10 between the outlet 16 of conveyer belt 17 and ante-chamber Anywhere.Sensor 25 also can be arranged in the intermediate cavity of the upstream of fan 21 and motor M thereof.As shown in Figure 1, temperature sensor 25 can utilize cable 28 to be connected with control device 26 (for example thyristor).In the embodiment shown in fig. 1, thyristor 26 can utilize cable 30 to be connected with another control device 27 (for example computer 27).Thyristor 26 can also utilize cable 29 to be connected with heating element heater 22.Computer 27 is given the nominal value of temperature and thyristor 27, and the actual value of temperature is provided by cable 28 by sensor 25.Thyristor can be controlled the output of heating element heater (one or more) 22, to increase or to reduce output.In order to protect the motor M of fan 21, the temperature of being measured by temperature sensor 25 does not preferably allow above 70 ℃.This expression is 70 ℃ by the nominal value of the temperature that computer 27 provides.Certainly, in the scope that motor M can work under the temperature more than 70 ℃ reliably, can allow by the temperature of temperature sensor 25 measurements correspondingly higher.In the embodiment shown in fig. 1, cable or electric wire 28,29,30 are connected thyristor 26 with heating element heater, temperature sensor 25 and computer 27.Yet, thyristor 26 can also with these element radio communications.
If use electric coil as heating element heater, then the temperature of coil or a plurality of coil 22 can remain in the 200-300 ℃ of scope, makes the temperature of the air that arrives the conveyer belt in the intermediate cavity 9 also in 200-300 ℃ scope.The life expectancy of electric coil and the temperature of coil heats have very big relation.For the coil of present commercial sale, if temperature is no more than 300 ℃, then the life expectancy of coil almost without limits.Certainly, after twice of air passed to metal object 19 by conveyer belt 17 and airborne a part of heat, the temperature of air was with much lower.Under the normal condition, the metal object that heat can be heated to and substantially exceed 300 ℃ temperature, and can not cause injurious effects to metal object itself.The temperature of using is subjected to the restriction of the life expectancy of motor M or desirable coil 22.
As previously mentioned, can be shearing device 31 in the back of heater 1.A kind of feasible design of shearing device is described referring now to Fig. 3.Shearing device can comprise fixing cutter 32 and movable cutter 33.Passage 34 runs through fixed cutting tool 32 and movable tool 33.Dispose a drift 35 and impact movable tool 33.Can comprise a damping element 36, to receive the impact of sending from cutting stroke and movable tool 33 is back to its origin-location.In order to cut off metallic rod 19, this bar is inserted in passage 34, make it run through fixed cutting tool 32 and enter in the movable tool 33.As shown in Figure 4, drift 35 impacts movable tool 33, and cuts off bar 19.Certainly, suitable shearing device 31 can have many other forms.If this bar of heating before cutting off operation then cuts off being easier to and the surface of actual cut-off part can be more smooth and more smooth.
In the embodiment of a reality, can use this heater and method, come heated length to be about 5.5m, diameter is the stainless steel of 16-25mm.Utilize the shearing device have at present, can continuously this bar be cut into 180 during about 50 seconds.This means must be continuously and supply with new bar apace.
The inventor finds, compares with using eddy-current heating, uses the air of heating that advantage is arranged.When using eddy-current heating, when the object of for example elongated metallic rod 19 1 classes of heating, reach the even heating difficulty of bar.For example, when heating the elongate rod of stainless nickel steel by induction, the surface of bar can be heated to harmful temperature, and that the inside of bar is still is cold, so that allow easily to cut off as desired this bar.In addition, the inventor finds, has that the object of glossy surface is more difficult to be heated by induction.The object that has glossy surface can comprise the stainless steel object.The poor thermal conductivity of stainless steel, this feasible this object of more difficult heating.The inventor finds, heats metal object such as stainless steel one class than heating metal objects is more effective by induction by convection current.A kind of practical methods that heats by convection current is to make the air stream of bar by heating.As previously mentioned, the embodiment of a reality of the present invention can comprise 12 fans and 12 heater coils, and the capacity of each heater coil is 3.5KW, and therefore the capacity of whole heater can reach 42KW.In order to reach the comparable thermal effect that adds by induction on stainless steel, desired power is about 100KW.In addition, eddy-current heating may be harmful to the surface of stainless steel.
A practical problem relevant with heating process is that the beginning temperature of usefulness hot-air heated metal object may be very different.The bar that cuts off often is stored in outdoor, and directly sends to cut-out from outdoor storage ground.Different according to season and weather, the temperature of bar can be from being lower than-30 ℃ to altering a great deal more than+30 ℃.This expression changes many to the requirement of heating process.In addition, the size of object (for example diameter of stainless steel) also influences the needed heat that adds.In order to control the temperature of the bar that will cut off, wish to control the amount of heating.Utilize temperature sensor and control appliance (for example thyristor) can control lever the temperature of heating.This can guarantee that the temperature of bar is identical when bar arrives shearing device.In addition, can protect the motor M of fan not by the high life expectancy of cause thermal damage and easier assurance coil 22.
Because following reason is divided into three chambeies that separate 8,9 with heater, 10 is highly beneficial.In the downstream of fan 21, in the fan work process, overvoltage will be arranged.Yet the choke valve that is formed by conveyer belt 17 combines with the suction effect that fan in back cavity 8 and ante-chamber 10 21 produces, and has the effect that makes insufficient pressure in back cavity and ante-chamber.This can offset the leakage of the air of heating to external environment.As a result, has the less advantage of treatment process energy needed.
For the heating diameter is the stainless steel of 16-25mm, keeps the spaced-apart about 50mm of bar to be fit on conveyer belt.This is determined by the distance between the tooth 18 of conveyer belt 17 at interval.In a practical embodiment of the invention, be approximately 700-1000mm from 4 distances to outlet 5 that enter the mouth, this can allow that about 14-20 bar is arranged simultaneously in heater 1.
Should be appreciated that above-mentioned temperature control system also can be used for the heater without separating into three chambeies that separate.It is also understood that and to utilize the thought of using three chambeies that separate, with whether to measure and control temperature irrelevant.But, temperature control is combined with the principle of using three chambeies that separate.
Can have two or more intermediate cavity, each intermediate cavity has one group of fan 21 and the heating element heater 22 of oneself.
Referring now to Fig. 5 another embodiment is described.In Fig. 5, fully phase out according to the back cavity 8 of the embodiment of Fig. 1, and enter the mouth and 4 directly feed the chambeies 9 of placing fans 21 and heating element heater 22.In this embodiment, do not have intermediate cavity, only enter chamber 9 and discharge side 10.
The another kind of method that this embodiment is described has only first chamber 9 and second chamber 10 in other words; Fan 21 and heating element heater 22 are arranged in first chamber 9.
Except cancellation back cavity 8, the mode of action of the embodiment of Fig. 5 is substantially the same with the embodiment of Fig. 1.Because it is first chamber 9 on border that heater 22 and fan 21 are arranged in the outside of shell 2, can expect that therefore the loss by 4 the heat of entering the mouth is than big according to the loss among the embodiment of Fig. 1.As a result, the inventor believes that the advantage of the embodiment of Fig. 5 is lacked than the embodiment of Fig. 1.Yet the hot-air leakage of atmosphere towards periphery still can reduce to a certain extent because in second chamber 10 insufficient pressure, this can offset hot-air by outlet 5 leakage.
Therefore, available more generally mode is described as relating to a kind of apparatus and method with the present invention, wherein air heats in a chamber 9 and blows through permeable conveyer belt 17 by a fan or a plurality of fan 21, and at least a portion air stream redirect at least one other chamber 8,10, and in a loop, be back to the chamber 9 that air wherein at first heats.This also can comprise and has two chambeies and heat the embodiment that carries out in second chamber 10 in principle, even the inventor believes that relatively advantage is less for the embodiment of this embodiment and Fig. 1 and Fig. 5.
Though apparatus and method of the present invention more than have been described, have should be understood that these categories reflect different aspect of the present invention.As a result, method of the present invention can comprise any method step as the natural result of operation apparatus of the present invention, no matter whether this step is mentioned significantly.
Claims (11)
1. the device (1) of a heating metal objects (19), this device comprises:
A) shell (2) of encirclement inner space (3), this shell (2) have inlet (4) and outlet (5);
B) in shell (2), inner space (3) are divided into the inwall (6,7) of back cavity (8), at least one intermediate cavity (9) and ante-chamber (10);
C) extend to the permeable conveyer belt (17) of the outlet (5) of shell (2) by back cavity (8), intermediate cavity (9) and ante-chamber (10) from the inlet (4) of shell (2), make the object (19) that is loaded on the conveyer belt (17) can pass through chamber (8,9,10) carry;
D) fan (21) of configuration at least one intermediate cavity (9) is guided air-flow into conveyer belt (17) and is placed on object (19) on the conveyer belt (17);
E) heating element heater (22) of configuration at least one intermediate cavity (9) arrives the preceding heating of conveyer belt (17) from fan (21) effluent air at gas;
F) its lumen (8,9,10) be connected to each other, make at least one outlet (14) of at least one intermediate cavity (9) be communicated with back cavity (8) and ante-chamber (10), at least one outlet (14) of intermediate cavity (9) is communicated with ante-chamber (10), and the outlet (12 of at least one inlet (13) of intermediate cavity (9) and back cavity (8) and ante-chamber (10), 16) be communicated with, make the work of fan (21) will produce rear circulation and same twice forward circulation twice by the gas of conveyer belt (17) by the gas of conveyer belt (17).
2. device as claimed in claim 1, wherein temperature sensor (25) is placed in the shell (2) and is connected with control device (26), the temperature of the heating element heater (22) of the function of the value that this control device (26) control is indicated as nominal value with by temperature sensor (25).
3. device as claimed in claim 2, wherein temperature sensor (25) is placed in the ante-chamber (10), between the outlet (16) of conveyer belt (17) and ante-chamber (10).
4. device as claimed in claim 1, wherein this device comprises a plurality of fans (21) and a plurality of heating element heater (22) among the vertically extending many rows of the direction of motion that is configured to conveyer belt (17).
5. the method for a heating metal objects (19) comprises the following steps:
A) metal object (19) on permeable conveyer belt (17) is passed through by shell (2) inner space (3) that surround and be divided into back cavity (8), at least one intermediate cavity (9) and ante-chamber (10) by inwall (6,7);
B) when conveyer belt (17) passes through this at least one intermediate cavity (10), add hot-air and the air that heats is blown through conveyer belt (17);
C) will be at least one intermediate cavity (10) the first of air of heating by conveyer belt (17) be converted in back cavity (8) by conveyer belt (17) and turn back to the rear circulation of the air of at least one intermediate cavity (9); With
The second portion of the air of heating that d) will be by at least one intermediate cavity (9) is converted in ante-chamber (10) by conveyer belt (17) and turns back to the forward circulation of the air of at least one intermediate cavity (9).
6. method as claimed in claim 5 is wherein measured the temperature of air in shell (2), and controls the heating of air as the function of the value of nominal value and measurement.
7. method as claimed in claim 6 wherein after air passes through the conveyer belt (17) in ante-chamber (10), is measured temperature on the position of measurement air themperature in ante-chamber (10).
8. method as claimed in claim 5 wherein utilizes the heater (22) be placed at least one intermediate cavity to add hot-air, and the temperature of heater (22) remains in 200 ℃-300 ℃ the scope.
9. method as claimed in claim 6, wherein nominal value is 70 ℃.
10. method as claimed in claim 5, wherein metal object (19) is elongated metallic rod (19).
11. the device (1) of a heating metal objects (19), this device comprises:
A) shell (2) of encirclement inner space (3), shell (2) have inlet (4) and outlet (5);
B) in shell (2), inner space (3) are divided at least one inwall (6,7) in the chamber (8,9,10) that separates;
C) extend to the permeable conveyer belt (17) of the outlet (5) of shell (2) from the inlet (4) of shell (2) by the chamber (8,9,10) that separates, make the object (19) that is loaded on the conveyer belt (17) can carry by chamber (8,9,10);
D) at least one fan (21) of configuration at least one intermediate cavity (9) is guided gas stream into conveyer belt (17) and is placed on object (19) on the conveyer belt (17);
E) at least one heating element heater (22), it is preceding to arrive conveyer belt (17) at gas, and heating is from least one fan (21) effluent air;
F) its lumen (8,9,10) be connected to each other, the air diverts that makes in a chamber (9) heating and blown through conveyer belt (17) by at least one fan (21) is at least one additional chamber (8,10) and in a loop, be back to the chamber (9) that at first adds hot-air, chamber (8,10) that should be additional is inlet (4) that has conveyer belt (17) and the chamber (8,10) that exports (5).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0502474-0 | 2005-11-08 | ||
| SE05024740 | 2005-11-08 | ||
| SE0502474A SE530124C2 (en) | 2005-11-08 | 2005-11-08 | Arrangement and method of heating metal objects |
| PCT/SE2006/050454 WO2007055650A1 (en) | 2005-11-08 | 2006-11-06 | An arrangement and a method for heating metal objects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101331009A true CN101331009A (en) | 2008-12-24 |
| CN101331009B CN101331009B (en) | 2010-05-19 |
Family
ID=38023532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800470551A Expired - Fee Related CN101331009B (en) | 2005-11-08 | 2006-11-06 | An arrangement and a method for heating metal objects |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20080237943A1 (en) |
| EP (1) | EP1945420A4 (en) |
| JP (1) | JP2009515129A (en) |
| KR (1) | KR20080080294A (en) |
| CN (1) | CN101331009B (en) |
| AU (1) | AU2006312319A1 (en) |
| BR (1) | BRPI0618637A2 (en) |
| CA (1) | CA2626938A1 (en) |
| SE (1) | SE530124C2 (en) |
| WO (1) | WO2007055650A1 (en) |
| ZA (1) | ZA200803710B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897533A (en) * | 2012-10-23 | 2013-01-30 | 昆山特力伯传动科技有限公司 | Conveyor belt heating method |
| CN105710130A (en) * | 2016-03-30 | 2016-06-29 | 宁波大学 | Floating pressing device for cross-wedge-rolled pieces |
| CN105728292A (en) * | 2016-04-19 | 2016-07-06 | 儒玛实业（上海）有限公司 | Electric heating device |
| CN107502724A (en) * | 2017-07-06 | 2017-12-22 | 江苏永昊高强度螺栓有限公司 | Bolt heat treatment system and method |
| CN108982201A (en) * | 2018-10-16 | 2018-12-11 | 无锡科智达科技有限公司 | A kind of air bath temperature control device and system |
| CN109234485A (en) * | 2017-07-11 | 2019-01-18 | 气体产品与化学公司 | System and method for preheating the granule containing metal |
| CN110885961A (en) * | 2018-09-10 | 2020-03-17 | 光洋热系统股份有限公司 | Heat treatment apparatus |
| TWI696704B (en) * | 2019-03-19 | 2020-06-21 | 輯興熱處理工業股份有限公司 | Colorizing method and device |
| TWI716899B (en) * | 2019-03-19 | 2021-01-21 | 輯興熱處理工業股份有限公司 | Colorizing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8783953B2 (en) * | 2011-07-21 | 2014-07-22 | Roller Bearing Company Of America, Inc. | Low friction seal for bearings |
| DE102012104537A1 (en) * | 2012-05-25 | 2013-11-28 | Benteler Automobiltechnik Gmbh | Furnace plant and method for operating the furnace |
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| US2296806A (en) * | 1940-05-28 | 1942-09-22 | Salem Engineering Company | Apparatus for heating metal objects |
| US4343209A (en) * | 1980-08-12 | 1982-08-10 | Advanced Machine Design Company | Zone heating and shearing system, and method |
| US4537102A (en) * | 1983-02-03 | 1985-08-27 | Park-Ohio Industries, Inc. | Method of shearing metal billets |
| IT1239118B (en) * | 1989-11-24 | 1993-09-28 | Elind | SYSTEM FOR HEATING BARS AND STEEL BILLS Upstream of a SHEAR FOR SUBSEQUENT PROCESSING |
| US5224638A (en) * | 1990-08-20 | 1993-07-06 | Alpha Industries, Inc. | Induction severing apparatus |
| FR2682623B1 (en) * | 1991-10-22 | 1994-02-18 | Ascometal | HOT FORGING INSTALLATION OF WORKPIECES FROM BARS. |
| US6620354B1 (en) * | 1999-11-29 | 2003-09-16 | The Conair Group, Inc. | Apparatus and method for producing and cutting extruded material using temperature feedback |
| DE10046957A1 (en) * | 2000-09-21 | 2002-04-11 | Basf Ag | Process for producing a multimetal oxide catalyst, process for producing unsaturated aldehydes and / or carboxylic acids and band calciner |
| EP1421035A1 (en) * | 2001-07-11 | 2004-05-26 | Feracitas Oy | Method for conducting heat to a glass sheet |
| CN1296784C (en) * | 2004-05-10 | 2007-01-24 | 浙江大学 | Automated control experimental apparatus for micro simulated tunnel kiln |
-
2005
- 2005-11-08 SE SE0502474A patent/SE530124C2/en not_active IP Right Cessation
-
2006
- 2006-11-06 JP JP2008538848A patent/JP2009515129A/en active Pending
- 2006-11-06 WO PCT/SE2006/050454 patent/WO2007055650A1/en active Application Filing
- 2006-11-06 US US12/092,759 patent/US20080237943A1/en not_active Abandoned
- 2006-11-06 ZA ZA200803710A patent/ZA200803710B/en unknown
- 2006-11-06 CA CA002626938A patent/CA2626938A1/en not_active Abandoned
- 2006-11-06 CN CN2006800470551A patent/CN101331009B/en not_active Expired - Fee Related
- 2006-11-06 EP EP06813074A patent/EP1945420A4/en not_active Withdrawn
- 2006-11-06 KR KR1020087013172A patent/KR20080080294A/en not_active Application Discontinuation
- 2006-11-06 AU AU2006312319A patent/AU2006312319A1/en not_active Abandoned
- 2006-11-06 BR BRPI0618637-8A patent/BRPI0618637A2/en not_active IP Right Cessation
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897533A (en) * | 2012-10-23 | 2013-01-30 | 昆山特力伯传动科技有限公司 | Conveyor belt heating method |
| CN102897533B (en) * | 2012-10-23 | 2014-11-12 | 昆山特力伯传动科技有限公司 | Conveyor belt heating method |
| CN105710130A (en) * | 2016-03-30 | 2016-06-29 | 宁波大学 | Floating pressing device for cross-wedge-rolled pieces |
| CN105728292A (en) * | 2016-04-19 | 2016-07-06 | 儒玛实业（上海）有限公司 | Electric heating device |
| CN107502724A (en) * | 2017-07-06 | 2017-12-22 | 江苏永昊高强度螺栓有限公司 | Bolt heat treatment system and method |
| CN109234485A (en) * | 2017-07-11 | 2019-01-18 | 气体产品与化学公司 | System and method for preheating the granule containing metal |
| CN109234485B (en) * | 2017-07-11 | 2021-04-23 | 气体产品与化学公司 | System and method for preheating metal-containing pellets |
| CN110885961A (en) * | 2018-09-10 | 2020-03-17 | 光洋热系统股份有限公司 | Heat treatment apparatus |
| CN110885961B (en) * | 2018-09-10 | 2021-08-24 | 光洋热系统股份有限公司 | Heat treatment apparatus |
| CN108982201A (en) * | 2018-10-16 | 2018-12-11 | 无锡科智达科技有限公司 | A kind of air bath temperature control device and system |
| TWI696704B (en) * | 2019-03-19 | 2020-06-21 | 輯興熱處理工業股份有限公司 | Colorizing method and device |
| TWI716899B (en) * | 2019-03-19 | 2021-01-21 | 輯興熱處理工業股份有限公司 | Colorizing method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1945420A1 (en) | 2008-07-23 |
| CA2626938A1 (en) | 2007-05-18 |
| EP1945420A4 (en) | 2011-01-05 |
| ZA200803710B (en) | 2009-09-30 |
| US20080237943A1 (en) | 2008-10-02 |
| WO2007055650A1 (en) | 2007-05-18 |
| CN101331009B (en) | 2010-05-19 |
| SE530124C2 (en) | 2008-03-04 |
| KR20080080294A (en) | 2008-09-03 |
| BRPI0618637A2 (en) | 2011-09-06 |
| JP2009515129A (en) | 2009-04-09 |
| AU2006312319A1 (en) | 2007-05-18 |
| SE0502474L (en) | 2007-05-09 |
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