CN102861878A - Induction heating method and induction heating device universally used in iron section cladding sand cast production line - Google Patents
Induction heating method and induction heating device universally used in iron section cladding sand cast production line Download PDFInfo
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- CN102861878A CN102861878A CN2012103847260A CN201210384726A CN102861878A CN 102861878 A CN102861878 A CN 102861878A CN 2012103847260 A CN2012103847260 A CN 2012103847260A CN 201210384726 A CN201210384726 A CN 201210384726A CN 102861878 A CN102861878 A CN 102861878A
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Abstract
The invention discloses an induction heating method and an induction heating device universally used in an iron section cladding sand cast production line. An iron section is placed on a transmission track of a roller bed transmission frame, an induction coil matched with the iron section in size is arranged on the transmission track of the roller bed transmission frame, and an aluminum casing is arranged outside the induction coil and is communicated with a loop of an induction power supply. A leading coil connector of the induction coil is connected with a main loop of the induction power supply. In the production process, heat released by iron liquid solidification in the last-round production process increases temperature of the iron section, induction current is utilized to generate an alternating current magnetic field, and the internal heating mechanism is utilized to heat the iron section to enable the temperature of the iron section to achieve machining process. Compared with the prior art, the method and the device are convenient to operate, low in manual cost, low in energy consumption, continuous in production process and quick and accurate in the heating process. The iron section cannot lose effect early, and the method and the device are suitable for production of various cast pieces.
Description
Technical field
The present invention relates to a kind of corollary equipment and processing method thereof of mechanical castings production process, particularly a kind of heater and method.
Background technology
Sand-Faced Metal Mould Casting is to be covered with the skim molding sand at metal mold (being called swage) inner chamber and to form a kind of casting technique of casting mold.So-called molding sand is to be used for the material of moulding in casting, is generally mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things.Since cover layer of sand thinner (4～8mm), therefore adopt somewhat expensive high-quality Modeling Material, also be reasonably economically, casting quality is improved greatly with waste product significantly reduces; Because the Iron Mould Coated Sand mold stiffness is fine, thereby dimensional accuracy and the compactness of foundry goods have also been improved significantly.
In the production process of Iron Mould Coated Sand production technology, covering the employed sand material that covers of layer of sand is a kind of thermosetting material.The temperature that experiment showed, swage and mould should remain on 220 ℃ ± 10 ℃, and guarantee covers layer of sand and obtains good curing.Cover the needed heat of layer of sand solidification process and come from two parts, the heat that mould and swage are stored.Wherein mould partly is to guarantee its temperature by the heating tube that is contained in mould inside, and swage can't carry thermal source because its operating mode is relatively poor, and iron liquid solidifies the heat that discharges and improves its temperature in the time of can only be by last round of production.
Therefore the temperature of swage is a main technologic parameters that determines product quality, has affected a series of important performances of casting mold such as hardening time, elevated temperature strength of precoated sand, and also parameter is closely related therewith for the dimensional accuracy of foundry goods and interior quality.
The control of traditional swage temperature mainly contains following several modes: iron liquid solidifies the heat heating swage that discharges when 1, relying on last round of production, and swage with cover the process that layer of sand contacts in make the curing of covering layer of sand; 2, swage is concentrated and to be entered trolley type annealing furnace and heat; 3, use online the diesel combustion stove that swage is heated.Summing up traditional swage temperature control mode is nothing but direct heat contact and radiation heating.
Domestic some swage heating or the swage heating similar techniques of disclosing, as:
1, [title] a kind of baking oven that covers the end radiation heating of sand for the iron film, [application number] CN201120324158.6, the patent documentation of [publication number] CN202192219U discloses a kind of baking oven that covers the end radiation heating of sand for the iron film, belong to the iron film and cover the sand apparatus field, it comprises body of heater, and described body of heater is provided with fire door and bell, and described furnace bottom is furnished with resistant to elevated temperatures radiation heating tube, described body of heater is that the steel plate of 5mm-7mm is made, and furnace lining is filled with refractory material; Fire door and bell adopt welded steel plate, filling fire resisting material; Described baking oven is provided with successively the thermal treatment zone, adjusts district and flat-temperature zone, and mode of heating is radiation heating.
2, [title] heating shooting sand device for metal mould sand lined machine, [patent No.] CN200620098727.9, [publication number] CN200942427, a kind of heating shooting sand device for metal mould sand lined machine is disclosed, this installs template, and template is fixed on and covers on the sand machine worktable, is fixed with electrothermal tube, thermocouple on the template, Circuits System realizes by fixed head and production line control centre links, and realizes that the weighing apparatus temperature of production thread ball mould is penetrated sand.
There is following defective in above-mentioned traditional swage mode of heating: 1, complicated operation, and cost of labor is high; 2, temperature control is inaccurate; 3, energy consumption is too high, the amount of heat waste; 4, production process can not be continuous; 5, owing to being external heat, cause the swage inequality of being heated, localized heat impacts large, and the swage early failure phenomena is very serious; 6, be not suitable for medium and small castings production.
Therefore additional a kind of easy and simple to handle in the sand-covering technique urgent need, cost of labor is low, and production process is continuous, energy consumption is low, swage be not easy in early days to lose efficacy and also be common to various model castings production swage fast, accurately heater is thought the needs that satisfy modern foundry industry.
Summary of the invention
The invention provides a kind of induction heating method and heater of Sand-Faced Metal Mould Casting production line, solved swage early stage easily inefficacy, medium and small castings production hard problem.
The induction heating apparatus that is common to the Sand-Faced Metal Mould Casting production line of the present invention is connected in going out between foundry goods device and the swage sand shake-out device using of Iron Mould Coated Sand equipment, the swage and the heating component that comprise roller-way conveyer frames and support thereof, be used for Iron Mould Coated Sand technique the heating operation roller-way conveyer frames double track inboard of swage is provided with bearing, overlapping the carrying roller foreign steamer on the bearing, swage is placed on the transmission track of roller-way conveyer frames, and is supported by the carrying roller foreign steamer; Described heating component is induction coil, and the rectangular coil shape that it is shaped as around swage is arranged on the transmission track of roller-way conveyer frames and size and swage are complementary, and induction coil is fixed by bakelite lattice framing (7); The induction coil outside also is covered with the arch shell, and the arch shell is fixedly connected with roller-way conveyer frames double track with the bakelite lattice framing respectively, induction coil draw coil interface with and be connected with the major loop of induction power supply.
Described induction coil adopts copper coil, and each circle maintains certain distance, and induction coil (6) is fastened on the bakelite lattice framing by stainless steel bolt and nut, and coil interface is provided with power supply access port and cold water access port.
The inboard set bearing of roller-way conveyer frames double track is heat-resisting bearing, and the arch shell is aluminium matter.The major loop of induction power supply is provided with power switch cabinet, power supply frequency conversion and rectifier cabinet and capacitor group.
In addition, the induction heating method that is common to the Sand-Faced Metal Mould Casting production line of the present invention, step is as follows:
The 1st step: by iron liquid in the last round of production process being solidified the heat transferred swage that discharges, the temperature that improves swage arrives a basal temperature;
The 2nd step: detect the swage basal temperature, when detecting the swage temperature and be lower than 220 ℃ ± 10 ℃, use induced-current that swage is heated to specified temp, make it by induction coil the time, stop, and produce the alternation induced field by the electric current that loads in the induction coil in swage inside, generation current makes the swage inner heat and heats up, and heating swage 30～50 seconds is introduced the water quench coil from the cold water access port of coil interface simultaneously;
The 3rd step: reach 220 ℃ ± 10 ℃ through swage temperature after the cooling of knockout station.
The specific range of temperatures of described second step is 230 ℃ ± 5 ℃.Induction coil (6) electric current when in the described second step swage being heated is the alternating current of 1000Hz, 380V.
The induction heating apparatus that is common to the Sand-Faced Metal Mould Casting production line of the present invention, the method that adopts change swage inside and surrounding magnetic field that the swage inner heat is rapidly heated, the radiation heating method that has replaced traditional high energy consumption, greatly reduce the heating power consumption, simplify the heating operation process of swage, effectively reduced running cost; Accurately control swage heating-up temperature for the curing of covering layer of sand provides the good solidification condition, reduces the percent defective that covers the layer of sand overcuring greatly in 230 ℃ ± 5 ℃ scopes, also makes Iron Mould Coated Sand technique be applicable to middle-size and small-size foundry goods.
Description of drawings
Fig. 1 is the internal structure schematic diagram of induction heating apparatus of the present invention.
Fig. 2 is the external structure of induction heating apparatus of the present invention.
Fig. 3 is the induction coil structural representation of induction heating apparatus of the present invention.
Fig. 4 is by induction heating apparatus work schematic diagram of the present invention.
Among the figure: 1-roller-way conveyer frames, 2-swage, 3-roller-way roller-way conveyer frames double track, 4-bearing, 5-carrying roller foreign steamer, the 6-induction coil, 7-bakelite lattice framing, 8-shell, 9-coil interface, the 10-induction power supply, 11-power switch cabinet, the frequency conversion of 12-power supply and rectifier cabinet, 13-capacitor group.
The specific embodiment
The invention will be further described with reference to the accompanying drawings and in conjunction with the specific embodiment for the below.
Shown in Fig. 1,2,3,4, be common to the induction heating apparatus of Sand-Faced Metal Mould Casting production line, be connected in going out between foundry goods device and the swage sand shake-out device using of Iron Mould Coated Sand equipment, comprise roller-way conveyer frames 1 and the swage 2 and the heating component that support, be used for Iron Mould Coated Sand technique to the heating operation of swage, it is characterized in that: roller-way conveyer frames double track 3 inboards are provided with bearing 4, overlapping carrying roller foreign steamer 5 on the bearing 4, swage 2 is placed on the transmission track of roller-way conveyer frames 1, and is supported by carrying roller foreign steamer 5; The transmission track of roller-way conveyer frames 1 is provided with induction coil 6 big or small and that swage 2 is complementary, and induction coil 6 is fixing by bakelite lattice framing 7; Induction coil 6 outsides also are covered with arch shell 8, and arch shell 8 is fixedly connected with roller-way conveyer frames double track 3 with bakelite lattice framing 7 respectively, induction coil 6 draw coil interface 9 with and be connected with the major loop of induction power supply 10.
Roller-way conveyer frames double track 3 inboard set bearings are heat-resisting bearings; Induction coil is connected and fixed by stainless steel bolt and nut by bakelite lattice framing 7; Coil interface 9 is provided with power supply access port and cold water access port; The major loop of induction power supply 10 is provided with power switch cabinet 11, power supply frequency conversion and rectifier cabinet 12, capacitor group 13.
The induction heating apparatus that is common to the Sand-Faced Metal Mould Casting production line provided by the invention, in diesel engine flywheel blank production process, the heat that at first uses iron liquid in the last round of production process to solidify to discharge improves the swage temperature, when detecting the swage temperature less than 220 ℃ ± 10 ℃ of technological requirement, when it passes through induction coil along the roller-way conveyer frames, with its stop; Introduce cooling water from the cold water access port of coil interface, coil interface is connected induction power supply, allows 1000HZ, 380V alternating current by induction coil, reaches the inside and outside and produce the intermediate frequency variation magnetic field around swage, and produce a large amount of eddy current in swage.Because the swage material resistance is larger, produces larger heat.The external magnetic field then goes back to inside by aluminum shell.Because the sheathing material magnetic resistance is little, resistance is little, does not produce larger heat.After the heating 30～50, a second swage temperature reaches 230 ℃ ± 5 ℃, finishes heating process; By the roller-way conveyer frames swage is transported to next station again, through the cooling of knockout station, the swage temperature will reach covers 220 ℃ ± 10 ℃ of the suitable temperatures that layer of sand solidifies.
Facts have proved that in a large number the induction heating apparatus that is common to the Sand-Faced Metal Mould Casting production line is a kind of easy and simple to handle, cost of labor is low, and production process is continuous, and energy consumption is low, swage be not easy in early days to lose efficacy and also be common to various model castings production swage fast, heater accurately.
After using the technology of the present invention, need not from production line the swage handling to be entered box-annealing furnace again, when detecting the swage temperature when low, start heater by the employee of knockout station and get final product, the arrangement personnel carry out swage and heat in addition.
Heating-up temperature can accurately be controlled at the curing situation that can accurately cover layer of sand in 230 ℃ ± 5 ℃ scopes, owes to solidify the pore class waste product that causes and descends more than 90% owing to covering the sand holes class waste product that the layer of sand overcuring causes and covering layer of sand.
Need not to use trolley type annealing furnace or the extremely low diesel combustion stove of the thermal efficiency of 160K W, the energy consumption of every heating one sections type only is: 0.30kwh again.Originally with the batch-type furnace average every type power consumption of actual production process 16.0kwh then.
Heat every sections type (being heated to 230 ℃ from common 150 ℃), only need about 40S, and the productive temp of production line be 30 types/hour, can not impact production.
The many-side of the induction heating method of Sand-Faced Metal Mould Casting production line and traditional heating method contrasts such as following table:
From upper table comparative analysis as seen, that the relative traditional heating device of the present invention has is simple to operate, cost, adaptable advantage, more accurate to the control of temperature simultaneously, adopt heater of the present invention and method, isodose is got the swage heating, energy efficient 98%, the efficiency of heating surface improves 3 times, and because production process is uninterrupted, production capacity will improve greatly than traditional heating means.
Claims (10)
1. induction heating apparatus that is common to the Sand-Faced Metal Mould Casting production line, be connected in going out between foundry goods device and the swage sand shake-out device using of Iron Mould Coated Sand equipment, comprise roller-way conveyer frames (1) and the swage (2) and the heating component that support, be used for Iron Mould Coated Sand technique to the heating operation of swage, it is characterized in that: roller-way conveyer frames double track (3) inboard is provided with bearing (4), overlapping carrying roller foreign steamer (5) on the bearing (4), swage (2) is placed on the transmission track of roller-way conveyer frames (1), and is supported by carrying roller foreign steamer (5); Described heating component is induction coil (6), it is shaped as the rectangular coil shape around swage (2), be arranged on the transmission track of roller-way conveyer frames (1) and size and swage (2) are complementary, induction coil (6) is fixed by bakelite lattice framing (7); Induction coil (6) outside also is covered with arch shell (8), and arch shell (8) is fixedly connected with roller-way conveyer frames double track (3) with bakelite lattice framing (7) respectively, induction coil (6) draw coil interface (9) with and be connected with the major loop of induction power supply (10).
2. heater according to claim 1, it is characterized in that: described induction coil (6) adopts copper coil, and each circle maintains certain distance.
3. induction heating apparatus according to claim 1 and 2, it is characterized in that: induction coil (6) is fastened on the bakelite lattice framing (7) by stainless steel bolt and nut.
4. induction heating apparatus according to claim 1, it is characterized in that: coil interface (9) is provided with power supply access port and cold water access port.
5. induction heating apparatus according to claim 1, it is characterized in that: the inboard set bearing of roller-way conveyer frames double track (3) is heat-resisting bearing.
6. induction heating apparatus according to claim 1, it is characterized in that: arch shell (8) is aluminium matter.
7. induction heating apparatus according to claim 1, it is characterized in that: the major loop of induction power supply (10) is provided with power switch cabinet (11), power supply frequency conversion and rectifier cabinet (12), capacitor group (13).
8. induction heating method that is common to the Sand-Faced Metal Mould Casting production line, it is characterized in that: step is as follows
The first step: by iron liquid in the last round of production process being solidified the heat transferred swage (2) that discharges, the temperature that improves swage arrives a basal temperature;
Second step: detect swage (2) basal temperature, when detecting swage (2) temperature and be lower than 220 ℃ ± 10 ℃, use induced-current that swage (2) is heated to specified temp, make it by induction coil (6) time, stop, and produce the alternation induced field by the electric current that loads in the induction coil (6) in swage (2) inside, generation current makes swage (2) inner heat and heats up, heating swage 30～50 seconds is introduced the water quench coil from the cold water access port of coil interface simultaneously;
The 3rd step: reach 220 ℃ ± 10 ℃ through swage (2) temperature after the cooling of knockout station.
9. heating means according to claim 6, it is characterized in that: the specific range of temperatures of described second step is 230 ℃ ± 5 ℃.
10. heating means according to claim 6 is characterized in that: induction coil (6) electric current when in the described second step swage being heated is the alternating current of 1000Hz, 380V.
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| CN2012103847260A CN102861878A (en) | 2012-10-12 | 2012-10-12 | Induction heating method and induction heating device universally used in iron section cladding sand cast production line |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103231023A (en) * | 2013-05-06 | 2013-08-07 | 浙江省机电设计研究院有限公司 | Iron-type automatic temperature regulating device and method for iron-type sand-lined production line |
| CN105217933A (en) * | 2015-08-20 | 2016-01-06 | 常熟建华模具科技股份有限公司 | Glass mold intermediate frequency induction heating device |
| CN106424567A (en) * | 2016-11-10 | 2017-02-22 | 内蒙古科技大学 | Composite electromagnetic pulse solidification structure treatment device and method for casting of ultralumin |
| CN106734919A (en) * | 2016-12-14 | 2017-05-31 | 南京科宏铸造有限公司 | A kind of balance weight mould and its precoated sand casting technique |
| CN107377886A (en) * | 2017-08-01 | 2017-11-24 | 浙江博星工贸有限公司 | The casting grilled mold technique of engine cam |
| CN110756744A (en) * | 2018-07-28 | 2020-02-07 | 江阴市惠尔信精密装备股份有限公司 | Casting sand mold forming method |
| CN113000791A (en) * | 2021-02-23 | 2021-06-22 | 王修强 | Iron mold sand coating method for steel casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105217933A (en) * | 2015-08-20 | 2016-01-06 | 常熟建华模具科技股份有限公司 | Glass mold intermediate frequency induction heating device |
| CN106424567A (en) * | 2016-11-10 | 2017-02-22 | 内蒙古科技大学 | Composite electromagnetic pulse solidification structure treatment device and method for casting of ultralumin |
| CN106424567B (en) * | 2016-11-10 | 2018-05-04 | 内蒙古科技大学 | Superhard aluminum casting composite electromagnetic pulse solidified structure processing unit and method |
| CN106734919A (en) * | 2016-12-14 | 2017-05-31 | 南京科宏铸造有限公司 | A kind of balance weight mould and its precoated sand casting technique |
| CN107377886A (en) * | 2017-08-01 | 2017-11-24 | 浙江博星工贸有限公司 | The casting grilled mold technique of engine cam |
| CN107377886B (en) * | 2017-08-01 | 2019-06-04 | 浙江博星工贸有限公司 | The casting grilled mold technique of engine cam |
| CN110756744A (en) * | 2018-07-28 | 2020-02-07 | 江阴市惠尔信精密装备股份有限公司 | Casting sand mold forming method |
| CN110756744B (en) * | 2018-07-28 | 2021-07-20 | 江阴市惠尔信精密装备股份有限公司 | Casting sand mold forming method |
| CN113000791A (en) * | 2021-02-23 | 2021-06-22 | 王修强 | Iron mold sand coating method for steel casting |
| CN113000791B (en) * | 2021-02-23 | 2022-12-13 | 湖北华阳汽车变速系统股份有限公司 | Iron mold sand coating method for steel casting |
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