CN204220916U - A kind of forging local heat stove - Google Patents
A kind of forging local heat stove Download PDFInfo
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- CN204220916U CN204220916U CN201420491923.7U CN201420491923U CN204220916U CN 204220916 U CN204220916 U CN 204220916U CN 201420491923 U CN201420491923 U CN 201420491923U CN 204220916 U CN204220916 U CN 204220916U
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- heat
- forging
- semicircle
- sidewall
- insulation layer
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Abstract
The utility model relates to a kind of firing equipment, specifically a kind of forging local heat stove is disclosed, it is characterized in that, comprise columnar furnace shell (3), be laid on the sidewall heat-insulation layer (2) of furnace shell (3) inner side, cover the sidewall refractory layer (4) of sidewall heat-insulation layer (2) inner side, the equidistant multiple annular supporting spring (6) being fixed on sidewall refractory layer (4) inner side from top to bottom, be fixed on the resistance wire (5) as the annular of thermal source on each annular supporting spring (6), the bottom heat-insulation layer (9) of furnace bottom and the bottom refractory layer (8) be laid on bottom heat-insulation layer (9), cover two semicircle bells (1) on heating furnace.Described bottom refractory layer (8) upper face center is placed with cushion block (7).Is provided with semicircular indentations in the middle of the straight flange of described semicircle bell (1), two semicircle bells (1) are combined into a complete circular top cover, and the semicircular indentations on two semicircle bells (1) is combined into a circular port.
Description
Technical field
The utility model belongs to Forge Heating technical field, is specifically related to a kind of forging local heat stove.
Background technology
In the part of variable cross-section major axis footpath, low-pressure turbine shaft is the vital part of Forced rotation, is made up of high temperature alloy, and high temperature alloy resistance of deformation is large, and narrow forging temperature is higher to the uniformity requirement of heating furnace.Forging is as shown in Figure 3 a variable cross-section major axis footpath partial plastic forming forging, and forging temperature is 1020 DEG C, as shown in Figure 1, and forging deformation after forging head local heat, and another part does not need distortion, finally forms part as shown in Figure 4.
Production at present for variable cross-section major axis footpath part has Integral die-forged and two sections of methods of welding.Because the material deformation drag of low-pressure turbine shaft is large, and forging is longer, need to drop into a large amount of equipment, mould according to Integral die-forged, and, just current heating means, need by the heating of forging entirety, so, required heating furnace volume is very large, and cost of manufacture is high, time-consumingly take power consumption material, add the cost of forging; According to Type of Welding, the quality of weld seam certainly will have a strong impact on the quality of product, such as aero-engine, and the method for welding low-pressure turbine shaft can not meet the security requirement of aero-engine.So best bet carries out local heat to forging, if but carry out local heat with existing cabinet-type electric furnace, the temperature homogeneity of local heat stove cannot ensure, also wastes time and energy during forging transfer, makes forging temperature be difficult to ensure.
Therefore, for the forge piece blank reheating only needing local heat just can meet the variable cross-section major axis footpath class that Forging Technology requires, a kind of heating furnace that can be applicable to variable cross-section major axis footpath forging local heat is needed.
Utility model content
For above problem, the purpose of this utility model is to provide a kind of forging local heat stove, and it can carry out local heat to longer forging, and not only in-furnace temperature is even, and is conducive to forging transfer, and forging final forging temperature is guaranteed.
For reaching above object, the utility model is achieved by the following technical solutions.
A kind of forging local heat stove, it is characterized in that, comprise columnar furnace shell, be laid on the sidewall heat-insulation layer inside furnace shell, cover the sidewall refractory layer inside sidewall heat-insulation layer, from top to bottom the equidistant multiple annular supporting spring be fixed on inside sidewall refractory layer, be fixed on the resistance wire as the annular of thermal source on each annular supporting spring, the bottom heat-insulation layer being arranged on Bottom of Heating Furnace and the bottom refractory layer be laid on the heat-insulation layer of bottom, cover two semicircle bells on heating furnace; Described bottom refractory layer upper face center is placed with cushion block; Is provided with semicircular indentations in the middle of the straight flange of described semicircle bell, two semicircle bells are combined into a complete circular top cover, and the semicircular indentations on two semicircle bells is combined into a circular port.
The feature of technique scheme and improvement further:
Described resistance wire has 12 times, upper six Tang Weishang districts, and lower is for six times inferior segment, and every district adopts three phase mains to power.
Described upper district is provided with for recording temperature and a S calibration twin-core thermocouple for temperature alarming; Described inferior segment is provided with for recording temperature and a 2nd S calibration twin-core thermocouple for temperature alarming; Wherein a single core thermocouple of each S calibration twin-core thermocouple is for recording temperature, and another single core is used for temperature alarming.
The beneficial effects of the utility model are, by establishing circular port on heating furnace top cover, to expose outside by other non-processing parts of forging, reducing the volume of heating furnace, saving the energy, are also conducive to the fixing of forging and transfer.Be provided with the resistance wire of the annular equidistantly distributed in heating furnace in heating furnace, make homogeneous temperature in heating furnace, ensure that forging terminal temperature.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the Facad structure schematic diagram of a kind of forging local heat stove of the present utility model;
Fig. 2 is the semicircle bell front schematic view of a kind of forging local heat stove of the present utility model;
Fig. 3 be a kind of forging local heat stove of the present utility model in order to heating forging structural representation;
Fig. 4 is the design of part schematic diagram shaped required by forging shown in Fig. 3.
In above figure: 1, semicircle bell; 2, sidewall heat-insulation layer; 3, furnace shell; 4, sidewall refractory layer; 5, resistance wire; 6, annular supporting spring; 7, cushion block; 8, bottom refractory layer; 9, bottom heat-insulation layer.
Detailed description of the invention
With reference to figure 1 and Fig. 2, for a kind of forging local heat stove of the present utility model, it has a columnar furnace shell (3), sidewall heat-insulation layer (2) is equipped with in furnace shell (3) inner side, sidewall refractory layer (4) is coated with in sidewall heat-insulation layer (2) inner side, equidistantly from top to bottom multiple annular supporting spring (6) is fixed with in sidewall refractory layer (4) inner side, each annular supporting spring (6) is fixed with the resistance wire (5) of the annular as thermal source, Bottom of Heating Furnace is provided with bottom heat-insulation layer (9), bottom heat-insulation layer (9) is equipped with bottom refractory layer (8).Heating furnace is also equipped with two semicircle bells (1).Wherein, bottom refractory layer (8) upper face center is placed with cushion block (7).Semicircular indentations is provided with in the middle of the straight flange of semicircle bell (1), two semicircle bells (1) can be combined into a complete circular top cover, and the semicircular indentations on two semicircle bells (1) can be combined into a circular port.
In an embodiment of forging local heat stove of the present utility model, heating furnace inner cavity size is φ 980mm, excircle dimension is φ 1730mm, the sidewall refractory layer (4) of heating furnace and bottom refractory layer (8) are the low cement high temperature castable refractory of 160mm high alumina, and refractoriness is 1700 DEG C.Sidewall heat-insulation layer (2) and bottom heat-insulation layer (9) select the composite construction of alumina silicate fiber felt and aluminium silicate fiber containing zirconia needle punched blanket, so not only thin heat-insulating property but also good, and save space.As calculated, when this stove is at serviceability temperature 1020 DEG C, furnace wall thickness 305mm, sidewall heat-insulation layer (2) and furnace shell (3) interface temperature are 38 DEG C, meet the designing requirement of general industry stove completely.
Resistance wire (5) in heating furnace has 12 times, upper six Tang Weishang districts, and lower is for six times inferior segment, and every district adopts three phase mains to power, and often alternate is twice.Resistance wire (5) material is 0Cr
21al
6nb, resistance wire diameter d=6.0mm, ρ
1000 DEG C=1.445 Ω .mm
2/ M.Single-phase electricity thermal element: R
hot resistance=3.23 Ω, heating length 61.60m, weight 12.5kg.Check resistance wire surface loading ω=1.32W/cm2, the pitch h=12.2mm of resistance wire.
This hot plate is high temperature furnace, the serviceability temperature of low-pressure turbine forging shaft 1020 DEG C ± 10 DEG C, and workpiece heat, to 1020 DEG C of needs heat 27240KK, closes 32KW; Castable refractory sidewall refractory layer heat loss 93002kJ/h, closes 25.83KW; Castable refractory bottom refractory layer and cushion block (7) heat loss 58689kJ/h, close 16.3KW; Open the radiation heat loss 28552kJ/h of semicircle bell (1), close 7.93KW; Three's sum is 82.06KW, and considering increases other heat loss 12% do not counted again, and this stove power demand is 92KW.
In the heating process of low-pressure turbine forging shaft, hot plate divides upper and lower twoth district to carry out temperature control, upper and lower two district's correspondences insert a S calibration twin-core thermocouple and a 2nd S calibration twin-core thermocouple, wherein a single core thermocouple of each S calibration twin-core thermocouple is for recording temperature, another single core is used for temperature alarming, thus form the heating that two autonomous system controls heating furnace, the upper and lower two district's temperature-controlled precisions of actual heating monitoring, within the scope of ± 10 DEG C, ensure that the heating-up temperature of stove and the normal hammered work of part.
When forging local heat stove of the present utility model heats to forging, first two of heating furnace semicircle bells (1) are opened, forging is put on the cushion block (7) of heating furnace, then semicircle bell (1) is closed, semicircular indentations in two semicircle bells (1) is combined into a circular hole, just forging is clamped, and then heat.After forging heats, open semicircle bell (1), manipulator takes out forging and forges.These heating means ensure that the heating-up temperature demand of variable cross-section long shaft parts forging deformation part, indeformable part is made again to expose outside heating furnace, save the energy and heating furnace volume, be conducive to the movement of forging, in heating furnace, the resistance wire (5) of equidistant arrangement can guarantee the terminal temperature of forging, ensure that the reliability that major axis footpath (low-pressure turbine shaft) is forged, meet the performance requirement of product, realize the one-shot forming rate of long-axis forging, decrease forging and obtain fiery time, shorten the process-cycle, improve productivity ratio, reduce production cost.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model also comprises these change and modification.
Claims (4)
1. a forging local heat stove, it is characterized in that, comprise columnar furnace shell (3), be laid on the sidewall heat-insulation layer (2) of furnace shell (3) inner side, cover the sidewall refractory layer (4) of sidewall heat-insulation layer (2) inner side, the equidistant multiple annular supporting spring (6) being fixed on sidewall refractory layer (4) inner side from top to bottom, be fixed on the resistance wire (5) as the annular of thermal source on each annular supporting spring (6), the bottom heat-insulation layer (9) being arranged on Bottom of Heating Furnace and the bottom refractory layer (8) be laid on bottom heat-insulation layer (9), cover two semicircle bells (1) on heating furnace, described bottom refractory layer (8) upper face center is placed with cushion block (7), is provided with semicircular indentations in the middle of the straight flange of described semicircle bell (1), two semicircle bells (1) are combined into a complete circular top cover, and the semicircular indentations on two semicircle bells (1) is combined into a circular port.
2. a kind of forging local heat stove as claimed in claim 1, it is characterized in that, described resistance wire (5) has 12 times, upper six Tang Weishang districts, and lower is for six times inferior segment, and every district adopts three phase mains to power.
3. a kind of forging local heat stove as claimed in claim 2, is characterized in that, described upper district is provided with for recording temperature and a S calibration twin-core thermocouple for temperature alarming.
4. a kind of forging local heat stove as claimed in claim 2, is characterized in that, described inferior segment is provided with for recording temperature and a 2nd S calibration twin-core thermocouple for temperature alarming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420491923.7U CN204220916U (en) | 2014-08-28 | 2014-08-28 | A kind of forging local heat stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420491923.7U CN204220916U (en) | 2014-08-28 | 2014-08-28 | A kind of forging local heat stove |
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| CN204220916U true CN204220916U (en) | 2015-03-25 |
Family
ID=52919059
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| CN201420491923.7U Active CN204220916U (en) | 2014-08-28 | 2014-08-28 | A kind of forging local heat stove |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708466A (en) * | 2019-01-22 | 2019-05-03 | 武汉重工铸锻有限责任公司 | Variable capacity tunnel type connecting rod heating furnace and heating means |
| CN112355230A (en) * | 2020-10-20 | 2021-02-12 | 中国第二重型机械集团德阳万航模锻有限责任公司 | High-temperature alloy bar blank heating device and heating method for shaft forgings |
| CN112475683A (en) * | 2020-11-24 | 2021-03-12 | 中车大连机车车辆有限公司 | Device and method for preheating circumferential weld joint and heating and slow cooling |
-
2014
- 2014-08-28 CN CN201420491923.7U patent/CN204220916U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708466A (en) * | 2019-01-22 | 2019-05-03 | 武汉重工铸锻有限责任公司 | Variable capacity tunnel type connecting rod heating furnace and heating means |
| CN112355230A (en) * | 2020-10-20 | 2021-02-12 | 中国第二重型机械集团德阳万航模锻有限责任公司 | High-temperature alloy bar blank heating device and heating method for shaft forgings |
| CN112475683A (en) * | 2020-11-24 | 2021-03-12 | 中车大连机车车辆有限公司 | Device and method for preheating circumferential weld joint and heating and slow cooling |
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