EP3397782A1 - Device for treating metal workpieces with cooling gas - Google Patents
Device for treating metal workpieces with cooling gasInfo
- Publication number
- EP3397782A1 EP3397782A1 EP16766466.3A EP16766466A EP3397782A1 EP 3397782 A1 EP3397782 A1 EP 3397782A1 EP 16766466 A EP16766466 A EP 16766466A EP 3397782 A1 EP3397782 A1 EP 3397782A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide
- cooling gas
- quenching chamber
- workpieces
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000112 cooling gas Substances 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 title abstract 2
- 238000010791 quenching Methods 0.000 claims abstract description 53
- 230000000171 quenching effect Effects 0.000 claims abstract description 50
- 238000001816 cooling Methods 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
Classifications
-
- 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
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
-
- 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
-
- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/613—Gases; Liquefied or solidified normally gaseous material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- 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
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/04—Circulating atmospheres by mechanical means
-
- 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
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/007—Cooling of charges therein
- F27D2009/0072—Cooling of charges therein the cooling medium being a gas
Definitions
- the invention relates to a device for the treatment of metallic workpieces with cooling gas, consisting of a horizontally arranged cylindrical housing with at least one closable opening for insertion and removal of the workpieces to be treated, with a quenching chamber located within the housing for receiving the workpieces to be treated with two fans arranged laterally and outside the quenching chamber for guiding a cooling gas through the quenching chamber and with typically two heat exchangers for cooling the cooling gas.
- the invention is based on the recognition that in each case one fan is associated with a heat exchanger and that above and below the quench chamber closable guide devices are arranged. Due to this arrangement, the flow resistance for the cooling gas is reduced considerably, since only every half te of the cooling gas must flow through a heat exchanger. Since the heat exchangers are no longer directly above and below the quenching chamber, they can have a significantly enlarged surface area with a greater degree of voiding, which again contributes to the reduction of the flow resistance. Also can be realized in the housing by this arrangement large-volume flow channels. This again a reduction of the flow resistance is achieved. These measures also lead to an increase in the achievable heat transfer coefficient and thus to a significantly higher transferable heat flow.
- the helium commonly used as refrigerant gas can be replaced by the much cheaper nitrogen.
- nitrogen has more turbulent flow properties, resulting in improved mixing of the cooling gas in the flow around the workpieces to be quenched, and thus in faster heat exchange of different cooling gas regions. This improves the heat transfer and the local homogeneity of the discharged heat flows.
- significantly reduced operating costs are achieved by the use of nitrogen as the cooling gas. Also eliminates the usual helium recovery process ..
- the heat exchangers are particularly advantageous to design the heat exchangers as ring heat exchangers. Hereby, large cooling surfaces can be realized while maintaining relatively low flow resistance.
- each ring heat exchanger encloses the impeller of its respective blower.
- a simple and robust guide consists of a guide box and a guide element associated therewith. In this case, it is easily possible to install corresponding guide plates for the cooling gas in the guide boxes, so that a targeted and uniform flow is achieved upon entry into the quenching chamber.
- Each guide element serves on the one hand for deflecting the partial cooling gas flow to the quenching chamber and on the other hand for alternately closing the associated guide rail.
- the two guide boxes are connected to one another via connecting elements. Then a single traversing device is sufficient to move the two guide boxes from one to the other position. Also, the control effort for the shuttle is simplified by this arrangement.
- a displacement device an electric motor with adjusting device or a pneumatic or hydraulic cylinder can be used. This traversing device is preferably arranged outside the housing.
- a structurally simple arrangement of the suction opening for each blower is achieved if it is arranged above and below and laterally next to the quenching chamber. Hereby, short flow paths are achieved. Also, this large-volume flow channels can be realized. As a result, the hot cooling gas leaving the quenching chamber can flow directly into the two blowers without great flow losses and from there to the ring heat exchangers in order to be recooled again.
- a structurally simple embodiment of the guide elements provides that they form a cross-sectionally v-shaped and that the associated guide box has a congruent cross-sectional shape on the side facing the guide element. Then, the guide element without further structural design for closing the guide box and thus to prevent the flow through the quenching chamber serve from this page. This in turn further reduces the flow resistance in the cooling gas circuit and thus increases the homogeneity of the cooling temperature and the cooling rate of the workpieces.
- heat exchangers are understood to mean not only individual heat exchangers, but also heat exchanger packages, as are also customary in devices of this type.
- blower is also understood as meaning blowers in the power range from 1 KW up to 1 MW, including high-power blowers.
- the invention is not limited to the specified combination of the features of independent patent claim 1 with the claims dependent thereon
- further possibilities of combining individual features, in particular if they emerge from the patent claims, the following description of the exemplary embodiments or directly from the figures, are intended to be combined with the reference to the figures by the use of reference numerals In no case limit the scope of the claims to the illustrated embodiments.
- FIG. 1 shows a cross section through a device according to the invention for treating metallic workpieces
- Figure 2 is a longitudinal section in perspective view of the device according to
- FIG. 1 A first figure.
- the device according to the invention consists of a cylindrical, single-walled, lying housing 1, on whose at least one of the end face, not shown here, a door or a slider is provided for closing.
- the quenching chamber 2 Centrally within the housing 1 is the quenching chamber 2, which is bounded at its two longitudinal sides by baffles 3 and 4.
- the quenching chamber 2 two laterally arranged carrier strips are provided, on which the quenched workpieces are stored. These carrier strips allow a maximum flow cross-section to the workpieces.
- the quenching chamber itself is in this case dimensioned so that it encloses the quenched workpieces as closely as possible.
- blower 5 and 6 Laterally next to the quenching chamber 2, two horizontally arranged blower 5 and 6 are provided, the drive motors 7 and 8 (only partially visible) are connected via gas-tight flange directly to the housing 1.
- the drive shafts of the two fans are arranged in alignment with each other.
- the impellers of the high-power blowers 5 and 6 are designated 9 and 10.
- the fans 5 and 6 are designed as high-performance blower.
- a ring heat exchanger 11 and 12 is mounted in each case.
- These ring heat exchangers can be constructed in one or more parts, round or crescent-shaped. In the exemplary embodiment shown, the ring heat exchangers are four- built up in part. To the ring heat exchanger is not shown here Leitblechgephaseuse arranged for low-pressure loss guidance of the cooling gas.
- an intake 13 and 14 which is limited on the side of the fan 5 and 6 by an inner parting plate 15 and 16.
- a guide device 17 and 18 is provided on the entire width and length of the quenching chamber.
- Each guide 17 and 18 consists of a guide box 19 and 20 and an associated guide element 21 and 22.
- the guide elements 21 and 22 are v-shaped in cross section and rigidly secured to the inside of the housing 1.
- Each guide box 19 and 20 has closed side walls 23 and 24. Parallel and perpendicular to the side walls 23 and 24 19 and 20 guide plates 25 are arranged in each guide box, so that form honeycomb rectangular guide channels 26 (Figure 2) for the cooling gas.
- the guide plates 25 are designed so that they correspond in cross section ( Figure 1), the shape of the guide elements 21 and 22.
- Both guide boxes 19 and 20 are connected by lateral connecting struts 27 and 28 with each other. These connecting struts are arranged to allow a nearly lossless flow connection from the quenching chamber to the intake tracts 13 and 14.
- a traversing device not shown, makes it possible to move the two guide boxes, as will be explained below.
- FIG. 2 shows a perspective longitudinal section through the device according to the invention.
- the construction and the arrangement of the guide channels 26 can be seen very clearly and, on the other hand, one of the four suction openings 29 of the intake tract 14. It is located above the quenching chamber 2.
- a non-visible further suction opening is located below the quenching chamber.
- the intake tract 13 has corresponding intake openings.
- FIG. 2 shows the arrangement of shielding plates 30 which are arranged above and below, on the front side and the rear side of the quenching chamber 2 - ⁇ - are and reach from this to the inside of the housing 1. This prevents that cooling gas flows bypassing the cooling channels 26 from the front and back of the quenching chamber in this. This ensures that the quenching chamber 2 is always only vertically flows through.
- the quenching chamber 2 is loaded through the front opening by means of an external device with a batch of workpieces that has been previously heated in a separate device and optionally carburized.
- the quenching chamber 2 is discharged either through the front opening or through a rear opening, if it is a continuous quenching chamber.
- the quenching chamber is flowed through by the cooling gas from bottom to top. This is indicated by a flow arrow 31.
- the guide 17 is in its upper end position, i. the upper guide box 19 abuts against its guide element 21. As a result, its guide channels 26 are closed and therefore can not be flowed through.
- the lower guide box 20 is spaced from its guide element 22, so that its guide channels 26 can be flowed through freely.
- the heated by the hot workpieces in the quenching chamber cooling gas is divided and sucked by the two upper intake ports 29 into two partial streams, led to the two high-performance blowers 5 and 6 and pressed by them radially through the ring heat exchangers 11 and 12, where it is cooled becomes. Then it flows through the spiral around the ring heat exchanger 11 and 12 extending around Leitleit and the guide element 22 deflected by the lower guide box 20 from below into the quenching chamber 2. Before and in the guide box 20, the two partial streams of the cooling gas are brought together again.
- the guide channels 26 align the flow of the cooling gas vertically again.
- the displacement device for the both Leitkarsten 19 and 20 activated.
- This moves the baffles from their upper position ( Figure 1, 2, 3a) via a central position ( Figure 3b), in which both baffles are removed from their vanes, to the lower position ( Figure 3c).
- the guide channels 26 are closed in the lower guide box 20 by the guide element 22.
- the upper suction openings 29 are closed by the side walls 23 and 24 of the upper guide box 19, while the lower suction openings 29 are released to the intake tracts 13 and 14. Since the upper guide box 19 is now positioned away from its guide element 21, the guide channels 26 are opened in this guide box 19.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015011504.9A DE102015011504A1 (en) | 2015-09-09 | 2015-09-09 | Apparatus for treating metallic workpieces with cooling gas |
PCT/DE2016/000276 WO2017041774A1 (en) | 2015-09-09 | 2016-07-15 | Device for treating metal workpieces with cooling gas |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3397782A1 true EP3397782A1 (en) | 2018-11-07 |
EP3397782B1 EP3397782B1 (en) | 2023-11-15 |
Family
ID=56939823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16766466.3A Active EP3397782B1 (en) | 2015-09-09 | 2016-07-15 | Device for treating metal workpieces with cooling gas |
Country Status (6)
Country | Link |
---|---|
US (1) | US10934599B2 (en) |
EP (1) | EP3397782B1 (en) |
CN (1) | CN108026599A (en) |
DE (1) | DE102015011504A1 (en) |
PL (1) | PL3397782T3 (en) |
WO (1) | WO2017041774A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015011504A1 (en) * | 2015-09-09 | 2017-03-09 | Ipsen International Gmbh | Apparatus for treating metallic workpieces with cooling gas |
DE102017103011A1 (en) | 2017-02-15 | 2018-08-16 | Gkn Sinter Metals Engineering Gmbh | Cooling module of a continuous sintering furnace |
DE102018220304B3 (en) * | 2018-11-27 | 2019-10-31 | Audi Ag | Quenching device with charging frame and charging frame |
DE102019122286A1 (en) | 2019-08-20 | 2021-02-25 | Kumovis GmbH | Floor element for an additive manufacturing system and additive manufacturing system |
CN113355499B (en) * | 2021-06-10 | 2021-12-17 | 久安特材科技(南通)有限公司 | Air-cooled rapid tempering device for special steel |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2701096B1 (en) | 1993-02-04 | 1995-03-24 | Bmi Fours Ind | High speed vacuum heat treatment furnace of the cooling gas stream. |
ES2159710T3 (en) | 1995-07-21 | 2001-10-16 | Ipsen Int Gmbh | OVEN FOR THE THERMAL TREATMENT OF LOADS OF METAL WORK PARTS. |
DE10038782C1 (en) * | 2000-08-09 | 2001-09-06 | Ald Vacuum Techn Ag | Process for cooling, especially quenching and hardening metallic workpieces, especially steel in a cooling chamber comprises circulating parallel cooling gas streams over the workpiece and a heat exchanger |
DE10044362C2 (en) * | 2000-09-08 | 2002-09-12 | Ald Vacuum Techn Ag | Process and furnace system for tempering a batch of steel workpieces |
DE10210952B4 (en) | 2002-03-13 | 2007-02-15 | Ald Vacuum Technologies Ag | Apparatus for treating metallic workpieces with cooling gas |
JP4280981B2 (en) * | 2003-06-27 | 2009-06-17 | 株式会社Ihi | Cooling gas air path switching device for vacuum heat treatment furnace |
EP1643199B1 (en) * | 2003-06-27 | 2010-05-05 | IHI Corporation | Gas cooling type vacuum heat treating furnace and cooling gas direction switching device |
CN100483058C (en) * | 2004-09-16 | 2009-04-29 | 石川岛播磨重工业株式会社 | Change-over device for cooling gas passages in vacuum heat treating furnace |
DE102004051546A1 (en) | 2004-10-22 | 2006-05-04 | Ald Vacuum Technologies Ag | Method for the low-distortion hardening of metallic components |
JP2011231969A (en) * | 2010-04-27 | 2011-11-17 | Ihi Corp | Heat treatment furnace |
FR2981665B1 (en) * | 2011-10-21 | 2013-11-01 | Ecm Technologies | TEMPERED CELL |
JP5779087B2 (en) * | 2011-12-28 | 2015-09-16 | 株式会社Ihi | Vacuum heat treatment equipment |
WO2013150488A1 (en) | 2012-04-05 | 2013-10-10 | Tek-Mak S.R.L. | Cooling apparatus |
FR3001229B1 (en) | 2013-01-23 | 2015-10-30 | Ecm Technologies | GAS TUMBLE CELL |
DE102015011504A1 (en) * | 2015-09-09 | 2017-03-09 | Ipsen International Gmbh | Apparatus for treating metallic workpieces with cooling gas |
-
2015
- 2015-09-09 DE DE102015011504.9A patent/DE102015011504A1/en not_active Withdrawn
-
2016
- 2016-07-15 EP EP16766466.3A patent/EP3397782B1/en active Active
- 2016-07-15 PL PL16766466.3T patent/PL3397782T3/en unknown
- 2016-07-15 WO PCT/DE2016/000276 patent/WO2017041774A1/en active Application Filing
- 2016-07-15 US US15/753,643 patent/US10934599B2/en active Active
- 2016-07-15 CN CN201680051960.8A patent/CN108026599A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US10934599B2 (en) | 2021-03-02 |
EP3397782B1 (en) | 2023-11-15 |
DE102015011504A1 (en) | 2017-03-09 |
PL3397782T3 (en) | 2024-04-15 |
US20200208232A1 (en) | 2020-07-02 |
CN108026599A (en) | 2018-05-11 |
WO2017041774A1 (en) | 2017-03-16 |
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