CN102865740B - Annealing furnace - Google Patents
Annealing furnace Download PDFInfo
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- CN102865740B CN102865740B CN201210317989.XA CN201210317989A CN102865740B CN 102865740 B CN102865740 B CN 102865740B CN 201210317989 A CN201210317989 A CN 201210317989A CN 102865740 B CN102865740 B CN 102865740B
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Abstract
The invention relates to an annealing furnace, which comprises a furnace body, a heating mechanism and a feeding mechanism, wherein a furnace cavity is formed on the furnace body; a feeding port is arranged at one end of the furnace cavity, and a blanking channel is formed at the end opposite to the feeding port in the furnace cavity to drop out material; the heating mechanism is used for heating the material in the furnace cavity; the feeding mechanism is detachably arranged at the end of the feeding port of the furnace cavity; the feeding mechanism comprises a guiding bracket, a jacking piece and a pushing piece; the material is accommodated in the guiding bracket; a contraposition frame is arranged on the guiding bracket; the jacking piece jacks the material in the guiding bracket into the contraposition frame; the pushing piece pushes the material in the contraposition frame into the furnace cavity, and at the same time shoves the material in the furnace cavity so that the material is dropped out of the blanking channel. According to the invention, the feeding mechanism of the annealing furnace facilitates material feeding of the annealing furnace, and through feeding at one end and discharging at the other end, the material can be continuously pushed in and jacked out, and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of Equipment for Heating Processing, relate in particular to a kind of annealing furnace.
Background technology
Annealing is a common technology in mechanical processing process, in order to reach certain specific character, improves its plasticity as reduced the hardness of workpiece, and workpiece need to, after heating, keep a period of time, and then slow cooling is to obtain this kind of performance.Annealing furnace is indispensable process equipment in annealing processing.Existing annealing furnace automaticity is not high, normally first the flue in annealing furnace is taken out from the burner hearth of annealing furnace, pack workpiece into flue, then flue is inserted in burner hearth, heating, is heated to preset temperature and keeps after the regular hour, and flue is exited from the burner hearth of annealing furnace, workpiece is taken out in flue, what adopted as Chinese patent the 200520132586.3rd is exactly technique scheme again.This kind of annealing furnace can not continuous feed and charging inconvenience, and automaticity is not high, has greatly affected the working (machining) efficiency of workpiece.
Summary of the invention
In view of the above, the present invention is necessary to provide the annealing furnace that a kind of charging is convenient, improve working (machining) efficiency.
A kind of annealing furnace, comprise body of heater, heating arrangements and feeding mechanism, on body of heater, offer burner hearth, one end of burner hearth is feeding mouth, on body of heater, relatively one end of feeding mouth offers blanking channel and drops out for material, heating arrangements is in order to heating material in burner hearth, feeding mechanism is arranged on one end of burner hearth feeding mouth separably, feeding mechanism comprises guide frame, liftout part and pusher part, content material in guide frame, on guide frame, be provided with para-frame, liftout part heads into the material in guide frame to para-frame, described pusher part is pushed into the material in para-frame in flue, material in burner hearth is pushed and dropped out from blanking channel simultaneously.
Wherein, between described blanking frame and para-frame, be formed with spaced walls, described spaced walls is formed with involute surface in a side of blanking frame, rolls in para-frame after making material by the jacking of liftout part.
Wherein, described guide frame comprises flitch, guide passage, and described upper flitch is placed material and roll into described guide passage under being pushed, material under deadweight along sliding into blanking frame under guide passage.
Wherein, the bottom surface of described blanking frame offers the piston that jacking hole coordinates described liftout part.
Wherein, described heating arrangements is gas heating mechanism, comprises fuel gas mechanism, combustion-supporting mechanism, nozzles and starter gate valve, fuel gas mechanism is connected described nozzles with combustion-supporting mechanism, and fuel gas mechanism provides combustion gas, and combustion-supporting mechanism provides combustion-supporting gas, start nozzles by pneumatic operated valve, to heating in burner hearth.
Wherein, described heating arrangements is electric lotus root heating arrangements, by electric lotus root heating arrangements to heating material in burner hearth.
Wherein, in described burner hearth, be provided with flue, in flue, be provided with stock guide, on stock guide, offer deflector chute.
Wherein, described annealing furnace comprises UTILIZATION OF VESIDUAL HEAT IN mechanism, UTILIZATION OF VESIDUAL HEAT IN mechanism comprises heat conduction case and discharge door, heat conduction case is arranged on the bottom of body of heater, heat conduction case is communicated with described blanking channel, on the tank wall of the relative blanking channel of heat conduction case, offers blanking port, and blanking port place is provided with described discharge door, heat conduction housing-case is established the pipeline that helps fuel gas mechanism, so that pipeline absorbs heat and utilizes waste heat.
Wherein, described annealing furnace comprises control system, controls the action of described heating arrangements, UTILIZATION OF VESIDUAL HEAT IN mechanism and feeding mechanism.
Wherein, multiple temperature detection parts are set in described burner hearth, temperature detection part is connected to display list, immediately to read the real-time temperature in burner hearth.
Annealing furnace of the present invention is by described feeding mechanism is set, and charging is convenient, and by the endfeed at annealing furnace, other end discharging can realize material and push continuously and eject, and automaticity is high, has alleviated the amount of labour, has greatly improved working (machining) efficiency.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of preferred embodiment annealing furnace of the present invention;
Fig. 2 is the schematic cross-section of the body of heater A-A direction of the annealing furnace shown in Fig. 1;
Fig. 3 is the schematic cross-section of the body of heater B-B direction of the heating furnace shown in Fig. 1;
Fig. 4 is the schematic cross-section of the body of heater C-C direction of the heating furnace shown in Fig. 1;
Fig. 5 is the structural representation of the feeding mechanism of the heating furnace shown in Fig. 1;
Fig. 6 is the structural representation of the body of heater of another preferred embodiment heating furnace.
Detailed description of the invention
By describing technology contents of the present invention, structural feature in detail, being realized object and effect, below in conjunction with drawings and Examples, annealing furnace of the present invention is described in further detail.
Refer to Fig. 1, preferred embodiment annealing furnace of the present invention comprises body of heater 10, heating arrangements 20, UTILIZATION OF VESIDUAL HEAT IN mechanism 30 and feeding mechanism 40.Heating arrangements 20 and UTILIZATION OF VESIDUAL HEAT IN mechanism 30 are set on body of heater 10; Heating arrangements 20 is to the object heating in body of heater 10; Waste heat leads to make full use of to the waste gas after burning in UTILIZATION OF VESIDUAL HEAT IN mechanism 30; Feeding mechanism 40 is arranged on one end of body of heater 10 separably, in order to material is pushed object in body of heater 10 continuously.
In conjunction with consulting Fig. 2 and Fig. 3, described body of heater 10 comprises body 11, flue 12 and fire door 13.On body 11, offer burner hearth 111 and blanking channel 112.Described burner hearth 111 connects the two ends of body 11, and one end of burner hearth 111 is formed as feeding mouth 113.Described blanking channel 112 is opened in one end of relative feeding mouth 113, and blanking channel 112 is opened in the bottom surface of body 11 and is communicated with described burner hearth 111.Described flue 12 is arranged in described burner hearth 111, and flue 12 one end are arranged on described feeding mouth 113, and the other end is in abutting connection with described blanking channel 112.
Incorporated by reference to consulting Fig. 4, the top of burner hearth 111 is domes, builds and is fan-shaped array at the brick at burner hearth 111 tops, and than traditional flat block structure, the refractory brick that is built into these domes is difficult for getting loose.Described flue 12 roofs are also domes accordingly, to coordinate roof of the furnace.Further, for the ease of pusher, in this flue 12, be also provided with stock guide 121.On stock guide 121, offer deflector chute 122, in order to place material and can slide along deflector chute 122 for material.In the present embodiment, the upper surface of stock guide 121 offers two deflector chutes 122 that are roughly " V " type.Deflector chute 122 is not limited to " V " type, can also be rectangle, deep-slotted chip breaker etc.
Described fire door 13 is arranged on the two ends of body 11, can be hinged on body 11, for the two ends of closed furnace 111.When after fire door 13 sealings of feeding mouth 113 ends, can not charging.Relatively on the fire door 13 of feeding mouth 113 one end, can offer fire observation window (not shown), in the time that needs are watched, open fire observation window, to check the heating situation in burner hearth 111.
Heating arrangements 20 is for the heating material in burner hearth 111, and mode of heating can adopt gas heating or the heating of electric lotus root, adopts fuel gas buring heating in this preferred embodiment.Heating arrangements 20 comprises fuel gas mechanism 21, combustion-supporting mechanism 22, nozzles 23 and starter gate valve 24.The gas conduct pipe 212 that fuel gas mechanism 21 comprises fuel gas source 211 and is connected with fuel gas source 211.Described fuel gas source can be the combustion gas such as gas tank, natural gas line delivery source.Described gas conduct pipe 212 is arranged on the top of the heating furnace body section 12 of body of heater 10, and it is connected with some combustion gas arms 213.Each combustion gas arm 213 is connected with nozzles 23.The combustion gas mixing burning that combustion-supporting mechanism 22 provides for combustion-supporting gas and fuel gas mechanism 21 are provided, the combustion-supporting airway 222 that combustion-supporting mechanism 22 comprises combustion-supporting source of the gas 221 and is connected with combustion-supporting source of the gas 221.Combustion-supporting source of the gas 221 can be the air conveyance devices such as blower fan, and accordingly, combustion-supporting gas can be air.Combustion-supporting airway 222 one end connect combustion-supporting source of the gas 221, and the other end is connected with some combustion-supporting gas branch pipes 223, and each combustion-supporting gas branch pipe 223 is connected with nozzles 23.
In conjunction with consulting Fig. 3 and Fig. 4, nozzles 23 are arranged on body 11 both sides, front and back and between two and relatively install.Each nozzles 23 one end connects described combustion gas arm 213 and combustion-supporting gas branch pipe 223, and the other end stretches in burner hearth 111 and has the gap of certain Gong flame combustion with flue 12.So, the combustion gas in the combustion-supporting gas in each combustion gas arm 213 and a combustion-supporting gas branch pipe 223 guides by nozzles 23, realizes at combustion gas and combustion-supporting gas in the interior mixed combustion of burner hearth 111, thereby the flue 12 in burner hearth 111 is heated.Each nozzles 23 are controlled igniting by starter gate valve 24 described in corresponding.Described starter gate valve 24 adopts electromagnetic ignition valve, and it is by control system control.In order to regulate the corresponding proportionate relationship of combustion air current amount and gas flow, can Set scale control valve on nozzles 23, regulate the ratio of combustion air current amount and gas flow, combustion-supporting gas and combustion gas are fully burnt.And, on each combustion gas arm 213 or combustion-supporting gas branch pipe 223, be also provided with independently gas flow switch, to control gas flow in shop.
Incorporated by reference to consulting Fig. 1 and Fig. 2, UTILIZATION OF VESIDUAL HEAT IN mechanism 30 comprises heat conduction case 31 and discharge door 32.Heat conduction case 31 is arranged on the bottom of body 11, and heat conduction case 31 covers are established the discharge end of described blanking channel 112, are communicated with described blanking channel 112, in order to the waste gas after burning is derived.On the tank wall of heat conduction case 31 relative blanking channels 112, offer blanking port 311, blanking port 311 places are provided with described discharge door 32, so that blanking port 311 is opened or closed.On heat conduction case 31, one end of blanking port 311 offers thermovent 312 relatively, and waste gas residual heat is shed from the thermovent 312 of heat conduction case 31.In order to make full use of waste heat, the sheathed combustion-supporting gas branch pipe 223 of heat conduction case 31, makes waste heat can conduct to combustion-supporting gas branch pipe 223 to helping gas heating.
Described feeding mechanism 40 comprises carrying platform 41, hoistable platform 42, guide frame 43, liftout part 44 and pusher part 45.On described carrying platform 41, carry described hoistable platform 42.The bottom of carrying platform 41 can arrange roller 411, and feeding mechanism 40 can integrally be moved.In conjunction with consulting Fig. 5, one end of the feeding mouth 113 of body of heater 10 can arrange guide rail 46 and coordinate described roller 411, and feeding mechanism 40 can be moved relative to body of heater 10.On described hoistable platform 42, carry described guide frame 43, liftout part 44 and pusher part 45, make three's integrally lifting of carrying platform 41 relatively.Described guide frame 43 comprises flitch 431, guide passage 432, blanking frame 433 and para-frame 434.Described upper flitch 431 is in order to place material and roll into described guide passage 432 under pushing; Described guide passage 432 is ramp way, and material can be glided along guide passage 432 under deadweight; Described blanking frame 433 is connected to the lower end of guide passage 432, makes the material skidding off from guide passage 432 directly enter blanking frame 433.One side of described blanking frame 433 relative guide passages 432 is provided with described para-frame 434, and and para-frame 434 between be formed with a spaced walls 435.This spaced walls 435 is for avoiding material directly to slip into para-frame 434, the frictional force when so reducing the interior material of para-frame 434 enter burner hearth 111 under pusher part 45 promoting.Spaced walls 435 is formed with involute surface 436 in a side of blanking frame 433, and blanking frame 433 becomes large in the bottom of involute surface 436 gradually to the bore on involute surface 436 tops.The bottom surface of this blanking frame 433 offers jacking hole 437, for coordinating described liftout part 44.By liftout part 44 jacking materials, and make the center of gravity of material lean on the side to involute surface 436, so, when material jacking is during to certain altitude, can roll into described para-frame 434.Described para-frame 434 is for the material of burner hearth 111 accommodating to be pushed to, one end of para-frame 434 is provided with described pusher part 45, relative one end offers registration holes 438, deflector chute 122 described in registration holes 438 corresponding matching, makes the material in para-frame 434 can enter deflector chute 122 under the promotion of pusher part 45.Described liftout part 44 is contained in the material in described blanking frame 433 in order to jacking, and material can be entered in para-frame 434; Described pusher part 45 is for pushing the material being contained in para-frame 434 in flue 12; Described liftout part 44 and pusher part 45 comprise respectively body and are connected on body the flexible piston of body relatively.Described liftout part 44 and pusher part 45 all can adopt cylinder.In the present embodiment, described guide frame 43 is combined with described liftout part 44 and described pusher part 45 accordingly for two of being oppositely arranged, each guide frame 43.
Described annealing furnace further comprises control system, for controlling the action of described heating arrangements 20, UTILIZATION OF VESIDUAL HEAT IN mechanism 30 and feeding mechanism 40, comprise fuel gas source 211 On/Off of controlling fuel gas mechanism 21, the combustion-supporting source of the gas 221 of combustion-supporting mechanism 22 is opened or is closed, the igniting of starter gate valve 24 to nozzles 23/close; The automatic opening/closing of the discharge door 32 of UTILIZATION OF VESIDUAL HEAT IN mechanism 30.The liftout part 44 of feeding mechanism 40 and the sequence of movement of pusher part 45 etc.Described control system is controlled all parts sequence of movement of annealing furnace, can adopt PLC program or microcomputor program.As, pushing a batch materials part to flue 12, close fire door 13, heat and be incubated after the default time, open fire door 13, startup liftout part 44 and pusher part 45 push next group material and enter flue 12.Described control system comprises electrical control cubicles 51, and some buttons 52 and some display lists or display lamp 53 are set in electrical control cubicles 51.Button 52 is controlled the On/Off of each mechanism action in order to correspondence, described display list or display lamp 53 show with the parameter such as the time of reading, temperature or safety alarm, as by multiple temperature detection parts are set at burner hearth 111, and be connected to display list 53 by line 54, can read the real-time temperature in burner hearth 111; By pressure detecting instrument is set, can be by detecting the operation conditions of each mechanism, undesired if mechanism occurs, and alarm.
When above-mentioned annealing furnace work, feeding mechanism 40 moves to a side of described body of heater 10, opens the fire door 13 of feeding mouth 113 ends, and the registration holes 438 of feeding mechanism 40 coordinates described deflector chute 122; Feeding mechanism action, material is inserted flitch 431 and is pushed guide passage 432 and roll into blanking frame 433, described liftout part 44 jacking materials enter in para-frame 434, described pusher part 45 promotes material and enters in flue 12, so, to in flue 12, fill up material, remove feeding mechanism 40 and close fire door 13.Start heating arrangements 20, the fuel gas source 211 of fuel gas mechanism 21 is opened and the combustion-supporting source of the gas 221 of combustion-supporting mechanism 22 is opened, and flue 12 is heated, and is heated to preset temperature and keeps a period of time, closes heating arrangements 20; Then feeding mechanism 40 is moved to a side of described body of heater 10, open the fire door 13 of feeding mouth 113 ends, feeding mechanism action, the material that newly enters flue 12 ejects interior flue 12 heat-treatment material, material falls along blanking channel 112, described in, discharge door 32 is opened accordingly when the whereabouts, and when without blanking, discharge door 32 is closed.Then will in flue 12, fill up new material, remove feeding mechanism 40 and close fire door 13, start heating arrangements 20, so circulation is to material annealing in process.
Described material comprises that iron, copper etc. need the metal material of heats forged, and material can be the erose material design of strip-shaped materials or globular material and other.
Can expect, described heating arrangements 20 can be electric lotus root heating arrangements, refers to Fig. 6, and electric lotus root heating arrangements 60 is arranged on the periphery of flue 12, by electric lotus root heating arrangements, flue 12 is heated, thereby to the heating material in flue 12.So, described UTILIZATION OF VESIDUAL HEAT IN mechanism 30 can improve or omit, and only sets out bin gate in blanking channel 112 exits.
Can expect, described body of heater 10 is interior can arrange cooling system, cooling system temperature-fall period effect after heating material insulation.
Can expect, described flue 12 can omit, by the interior stock guide 121 that arranges of burner hearth 111.
To sum up, annealing furnace of the present invention is by described feeding mechanism 40 is set, and charging is convenient, and by the endfeed at body of heater 10, other end discharging can realize material and push continuously and eject, and automaticity is high, alleviate the amount of labour, greatly improved working (machining) efficiency.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be not depart from technical solution of the present invention content, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. an annealing furnace, comprises body of heater, heating arrangements and feeding mechanism, it is characterized in that:
On body of heater, offer burner hearth, one end of burner hearth has feeding mouth, and one end of feeding mouth offers blanking channel and drops out for material relatively in burner hearth, and heating arrangements is in order to heating material in burner hearth; Wherein, the top of burner hearth is domes, builds and is fan-shaped array at the brick of roof of the furnace, and than traditional flat block structure, the refractory brick that is built into these domes is difficult for getting loose, and flue roof is also domes accordingly, to coordinate roof of the furnace; In this flue, be also provided with stock guide, on stock guide, offer deflector chute, in order to place material and can slide along deflector chute for material;
Described feeding mechanism comprises carrying platform, hoistable platform, guide frame, liftout part and pusher part, carries described hoistable platform on described carrying platform, and the bottom of carrying platform can arrange roller, and feeding mechanism can integrally be moved; One end of the feeding mouth of body of heater arranges guide rail and coordinates described roller, and feeding mechanism can be moved relative to body of heater; On described hoistable platform, carry described guide frame, liftout part and pusher part, make three's integrally lifting of carrying platform relatively; Described guide frame comprises flitch, guide passage, blanking frame and para-frame; Described upper flitch is in order to place material and roll into described guide passage under pushing; Described guide passage is ramp way, and material can be glided along guide passage under deadweight; Described blanking frame is connected to the lower end of guide passage, makes the material skidding off from guide passage directly enter blanking frame; One side of the relative guide passage of described blanking frame is provided with described para-frame, and and para-frame between be formed with a spaced walls; This spaced walls is used for avoiding material directly to slip into para-frame, so reduces in para-frame frictional force when material enters burner hearth under pusher part promotes; Spaced walls is formed with involute surface in a side of blanking frame, and blanking frame becomes large in the bottom of involute surface gradually to the bore on involute surface top; The bottom surface of this blanking frame offers jacking hole, for coordinating described liftout part, by liftout part jacking material, and makes the center of gravity of material lean on the side to involute surface, so, when material jacking is during to certain altitude, can roll into described para-frame; Described para-frame is for the material of burner hearth accommodating to be pushed to, one end of para-frame is provided with described pusher part, relative one end offers registration holes, and deflector chute described in registration holes corresponding matching, makes the material in para-frame can enter deflector chute under the promotion of pusher part; Described liftout part is contained in the material in described blanking frame in order to jacking, and material can be entered in para-frame; Described pusher part is used for the material being contained in para-frame to push in flue, and the material in burner hearth is pushed and dropped out from blanking channel;
Cooling system is set, cooling system temperature-fall period effect after heating material insulation in body of heater.
2. annealing furnace as claimed in claim 1, is characterized in that: described liftout part and pusher part comprise respectively body and be connected on body the flexible piston of body relatively.
3. annealing furnace as claimed in claim 1, it is characterized in that: described heating arrangements is gas heating mechanism, comprise fuel gas mechanism, combustion-supporting mechanism, nozzles and starter gate valve, fuel gas mechanism is connected described nozzles with combustion-supporting mechanism, fuel gas mechanism provides combustion gas, combustion-supporting mechanism provides combustion-supporting gas, starts nozzles by pneumatic operated valve, to heating in burner hearth.
4. annealing furnace as claimed in claim 3, it is characterized in that: described annealing furnace also comprises UTILIZATION OF VESIDUAL HEAT IN mechanism, UTILIZATION OF VESIDUAL HEAT IN mechanism comprises heat conduction case and discharge door, heat conduction case is arranged on the bottom of body of heater, heat conduction case is communicated with described blanking channel, on the tank wall of the relative blanking channel of heat conduction case, offers blanking port, and blanking port place is provided with described discharge door, heat conduction housing-case is established the pipeline that helps fuel gas mechanism, so that pipeline absorbs heat and utilizes waste heat.
5. annealing furnace as claimed in claim 4, is characterized in that: described annealing furnace comprises control system, controls the action of described heating arrangements, UTILIZATION OF VESIDUAL HEAT IN mechanism and feeding mechanism.
6. annealing furnace as claimed in claim 1, is characterized in that: multiple temperature detection parts are set in described burner hearth, are provided with display list on body of heater, temperature detection part is connected to display list, reads the real-time temperature in burner hearth by display list.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210317989.XA CN102865740B (en) | 2012-08-31 | 2012-08-31 | Annealing furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317989.XA CN102865740B (en) | 2012-08-31 | 2012-08-31 | Annealing furnace |
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| CN102865740A CN102865740A (en) | 2013-01-09 |
| CN102865740B true CN102865740B (en) | 2014-07-30 |
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| CN201210317989.XA Active CN102865740B (en) | 2012-08-31 | 2012-08-31 | Annealing furnace |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107419080B (en) * | 2017-07-03 | 2018-10-19 | 浙江星辉铝轮有限公司 | A kind of annealing furnace combined type feeding device |
| CN107385158B (en) * | 2017-07-03 | 2018-10-19 | 浙江星辉铝轮有限公司 | It is a kind of can anti-overfeeding annealing furnace feeding device |
| CN109609732B (en) * | 2018-11-24 | 2020-06-16 | 绍兴上虞正达管业有限公司 | Annealing furnace |
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| JP2508556B2 (en) * | 1991-07-30 | 1996-06-19 | いすゞ自動車株式会社 | Combined annealing and quenching furnace |
| JPH08318337A (en) * | 1995-05-25 | 1996-12-03 | Fujikura Ltd | Method and equipment for discharge treatment of nonmonolithic metal |
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| CN201997991U (en) * | 2011-02-26 | 2011-10-05 | 李德昌 | Full-automatic feeding, cutting and collecting equipment |
| CN102615235A (en) * | 2012-04-23 | 2012-08-01 | 彭亦楚 | Forge heating furnace |
| CN202398772U (en) * | 2012-01-16 | 2012-08-29 | 彭亦楚 | Continuous forging heating furnace |
| CN202881318U (en) * | 2012-08-31 | 2013-04-17 | 肇庆宏旺金属实业有限公司 | Annealing furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2508556B2 (en) * | 1991-07-30 | 1996-06-19 | いすゞ自動車株式会社 | Combined annealing and quenching furnace |
| JPH08318337A (en) * | 1995-05-25 | 1996-12-03 | Fujikura Ltd | Method and equipment for discharge treatment of nonmonolithic metal |
| CN2308861Y (en) * | 1997-04-17 | 1999-02-24 | 林棋洲 | Stoking mechanism of high temp. fritting furnace |
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