Convection furnace

Abstract

The present invention relates to a furnace device for heating a plate, in particular a metal plate, by convection. The furnace device has a housing, in which a temperature control region for temperature-controlling a component part and an adjustment region are formed, wherein the adjustment region has a temperature control device for adjusting a temperature of a temperature control fluid. Further, the furnace device has a positioning device for positioning the plate in the temperature control region in a predetermined orientation, and a ventilator, which is arranged in the housing and which is adapted to circulate the temperature control fluid in the housing between the temperature control region and the adjustment region such that the temperature control fluid is flowable in a flow direction along a surface of the plate.

Claims

1. A furnace device for heating a plate by convection, the furnace device having: a housing, in which a temperature control region for temperature-controlling a component part and an adjustment region are formed, wherein the housing has a first opening through which the plate is introducible into the temperature control region along a charging direction, wherein the adjustment region has a temperature control device for adjusting a temperature of a temperature control fluid, a charging fork for positioning the plate in the temperature control region in a horizontally lying orientation, wherein the charging fork has a sealing member, wherein the sealing member is formed in such a manner that in a position, at which the plate is in the horizontally lying orientation in the temperature control region, the sealing member seals the first opening, and a ventilator, which is arranged in the housing and which is adapted to circulate the temperature control fluid in the housing between the temperature control region and the adjustment region in such a manner that the temperature control fluid is flowable in a flow direction along a surface of the plate.

2. The furnace device according to claim 1, wherein an angle, α, of less than 30°, is present between the flow direction and the surface of the plate, in such a manner that the temperature control fluid flows laminarly along the surface of the plate.

3. The furnace device according to claim 1, wherein a fluid guide region is formed in the housing between the temperature control region and the adjustment region, in which fluid guide region the temperature control fluid is adjustable to the flow direction, wherein the furnace device further has a fluid guide element, which is arranged in the housing, for guiding the temperature control fluid, wherein the fluid guide element is formed and arranged in such a manner that the temperature control fluid is deflectable in the flow direction before flowing along a surface of the plate.

4. The furnace device according to claim 1, wherein a ventilator region is formed in the housing between the temperature control region and the adjustment region, in which ventilator region the ventilator for driving the flow fluid is arranged.

5. The furnace device according to claim 1, further having a partition wall, which is arranged in the housing in such a manner that the temperature control fluid flows along the flow direction in the temperature control region and the temperature control fluid flows opposite to the flow direction in a return region, which is separated from the temperature control region by the partition wall.

6. The furnace device according to claim 1, wherein the charging fork and the first opening are formed in such a manner that the charging direction is perpendicular to the flow direction.

7. The furnace device according to claim 1, wherein the housing has a second opening through which the plate is movable out of the temperature control region along the charging direction.

8. The furnace device according to claim 1, wherein the charging fork is configured displaceably in such a manner that the plate is movable into and/or is movable out of the environment of the housing through the first opening into the temperature control region along the charging direction.

9. The furnace device according to claim 8, wherein the charging fork forms a support in the first opening of the housing, by which support the positioning device is fixable to the housing.

10. The furnace device according to claim 8, wherein the charging fork has a coupling region, which is configured in such a manner that a gripping device for moving the charging fork is couplable thereto.

11. The furnace device according to claim 1, wherein the charging fork has a conveyor path, which is arranged within the temperature control region and which is configured in such a manner that the plate is movable into and/or is movable out of the temperature control region on the conveyor path along the charging direction from the environment of the housing through the first opening.

12. The furnace device according to claim 1, further having at least one further charging fork for positioning a further plate in the temperature control region in a further predetermined orientation such that the temperature control fluid is flowable in the flow direction along a surface of the further plate, wherein the housing has a further first opening, through which the further plate is introducible into the temperature control region along the charging direction.

13. The furnace device according to claim 12, wherein the charging fork and the further charging fork are arranged in the temperature control region in such a manner that the plate and the further plate are arrangeable parallel to each other.

14. The furnace device according to claim 12, further having a further partition wall, which is arranged between the charging fork and the further charging fork in the temperature control region.

15. The furnace device according to claim 12, further having a further fluid guide element, which is arranged in the housing for guiding the temperature control fluid, wherein the further fluid guide element is formed and arranged in such a manner that the temperature control fluid is deflectable in the flow direction before the flowing along a further surface of the further plate.

16. The furnace device according to claim 1, wherein the temperature control device has an electrical heating register.

17. A method for heating a blank by the furnace device according to claim 1, the method comprising: adjusting a temperature of a temperature control fluid by the temperature control device, positioning the blank in the temperature control region in a predetermined horizontal orientation by the charging fork, and circulating the temperature control fluid in the housing between the temperature control region and the adjustment region such that the temperature control fluid flows in a flow direction along a surface of the blank.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) For a further explanation and a better understanding of the present invention, embodiment examples are described in more detail below with reference to the attached drawings, in which:

(2) FIG. 1 is a schematic illustration of a furnace device according to an exemplary embodiment of the present invention.

(3) FIG. 2 is a perspective view of the furnace device from FIG. 1.

(4) FIG. 3 is a schematic illustration of a charging fork according to an exemplary embodiment of the present invention.

(5) FIG. 4 is a schematic illustration, in side view, of a furnace device according to an exemplary embodiment of the present invention.

(6) FIG. 5 is a top view of a furnace device according to an exemplary embodiment.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

(7) Same or similar component parts in different figures are provided with the same reference numerals. The illustrations in the figures are schematic.

(8) FIG. 1 shows a schematic illustration of a furnace device 100 according to an exemplary embodiment. FIG. 2 shows a perspective illustration of the furnace device from FIG. 1 The present invention may relate to a furnace device 100 for heating a plate 101, in particular one or plural metal plates 101, by convection. The furnace device 100 may have a housing 102, in which a temperature control region 103 for temperature-controlling a component part and an adjustment region 104 may be formed, wherein the adjustment region 104 may have a temperature control device 105 for adjusting a temperature of a temperature control fluid. Further, the furnace device 100 may have a positioning device 106 for positioning the plate 101 in the temperature control region 103 in a predetermined orientation, and a ventilator 107, which may be arranged in the housing 102 and may be adapted to circulate the temperature control fluid in the housing 102 between the temperature control region 103 and the adjustment region 104 such that the temperature control fluid may be flowable in a flow direction 108 along a surface of the plate 101.

(9) The furnace device 100 may be in particular a stationary furnace, in which a batch of plates 101 may be heated to, held at or cooled to a desired temperature. A batch of plates 101 may thus be placed in the temperature control region 103 of the housing 102 and subsequently temperature-controlled to a desired temperature.

(10) The furnace device 100 may work in particular according to the type of a convection furnace, in which the temperature control fluid may circulate inside the housing 102. The housing 102 may have a temperature control region 103, in which the plate 101 may be temperature-controlled, and an adjustment region 104, in which the temperature control fluid may be heated or cooled to the desired temperature. The temperature control fluid may accordingly pass to the adjustment region 104 and may then flow into the temperature control region 103 for temperature-controlling the plate 101. In the adjustment region a temperature control device 105, which may represent for example an electrical heating register, may be provided in order to bring the temperature control fluid again to a desired temperature.

(11) The furnace device 100 may be designed in such a manner that the temperature control fluid may flow with a specific flow direction 108 along a surface of the plate 101. The flow direction 108 of the temperature control fluid as well as the orientation of the plate 101 may be adjusted relative to each other in such a manner that the temperature control fluid may flow along the surface of the plate 101, in particular in laminar flow.

(12) After the plate 101 may have been adjusted to a desired temperature by the furnace device 100, the plate 101 may, for example, be supplied to a further temperature treatment, such as for example a temperature controlling or quenching process, or to a further forming process, such as a press or a press hardening tool (or in-mold hardening tool).

(13) The positioning device 106, on which the plate 101 may be supported, may be used for the exact orientation (or alignment) of the plate 101 relative to the flow direction. In the embodiment example from FIG. 1 and FIG. 2, there are shown 5 positioning devices 106 one above the other, each of which may be designed as charging fork 301 (see FIG. 3). A distance may be provided between the respective plates 101 such that the corresponding temperature control fluid may flow along the corresponding surfaces of the plates 101.

(14) The positioning devices 106 may be moved into and out of the temperature control region 103 in different vertically spaced levels in order to temperature-control a plurality of plates 101 along the different levels.

(15) Between the flow direction 108 and the surface of the plate 101 there may be an angle α of less than 30°, in particular of less than 15°, such that the temperature control fluid may flow, in particular laminarly, along the surface of the plate 101. In particular, the flow direction may be adjusted parallel to the surface of the plate 101. If there is a small angle α between the surface of the plate 101 under the flow direction 108, impact jets may be prevented, which may result in turbulences and a disturbed flow pattern.

(16) In the housing 102, a fluid guide region 109 may be formed between the temperature control region 103 and the adjustment region 104, in which the temperature control fluid may be adjustable to the flow direction 108. The temperature control region 103 and the adjustment region 104 may be arranged in the housing 102 one above the other. The fluid guide region 109 may represent the connecting region between the adjustment region 104 and the temperature control region 103, wherein the fluid guide region 109 may divert the temperature control fluid, which may exit from the adjustment region 104, in the flow direction 108. The fluid guide region 109 may be formed, so to speak, along a circulation path of the temperature control fluid after the adjustment region 104 and before the temperature control region 103.

(17) In particular, fluid guide elements 110 may be arranged in the fluid control area 109 for guiding the temperature control fluid. A fluid guide element 110 may be formed and arranged in such a manner that the temperature control fluid may be deflectable in the direction of the flow direction 108 before the flowing along a surface of the plate 101. The fluid guide element 110 may be a sheet-metal-shaped fluid guide element, which may, for example, be appropriately bent in order to guide and divert the temperature control fluid on its surfaces. The fluid guide element 110 may [together] with a spaced-apart further fluid guide element 110 or with a wall of the housing 102 form a corresponding flow channel, at the outlet of which the temperature control fluid may exit in the flow direction 108 in the direction towards the plate 101.

(18) The housing 102 may have a ventilator region 111 between the temperature control region 103 and the adjustment region 104, in which the ventilator 107 may be arranged for driving the flow fluid. For example, the ventilator region 111 may be formed along the circulation path of the temperature control fluid before the adjustment region 104 and after the temperature control region 103. In this arrangement, the ventilator 107 in the ventilator region 111 may drive the temperature control fluid, which may have been cooled down in temperature control region 103, again before it may enter the adjustment region 104 and may be led to the corresponding temperature control device 105. In the ventilator region 111, additional return baffles 114 may be provided, which may divert the temperature control fluid to the ventilator 107.

(19) The furnace device 100 further may have a partition wall 112, which may be arranged in the housing 102 in such a manner that in the temperature control region 103 the temperature control fluid may flow along the flow direction and in a return section 113, which may be separated from the temperature control region 103 by the partition wall 112, the temperature control fluid may flow opposite to the flow direction 108. The temperature control section 103 may be arranged below the return region 113 and separated from the return region 113 by the partition wall 112. In the return region 113, for example, the adjustment region 104 with the temperature control device 105 may be formed.

(20) A plurality of fluid guide elements 110 may be arranged in the fluid guide region 109, which may deflect the temperature control fluid in the direction of the flow direction 108 before the flowing along a corresponding surface of the corresponding plate 101.

(21) The temperature control device 105 may have an electrical heating register (or heater coils). The electrical heating register may thus be passed by the temperature control fluid such that the latter may be heated.

(22) Furthermore, a fluid inlet may be provided in the housing 102, in particular in the ventilator region 107, such that a temperature control fluid may be introduced from the surroundings into the interior of the housing 102 through the fluid inlet. For example, air or an inert gas may be introduced. The fluid inlet 115 may be closed selectively.

(23) FIG. 3 shows a schematic illustration of a charging fork 301 as a positioning device 106. At least one plate 101 may be placeable on the charging fork 301. The charging fork 301 may have at least two or more spaced support rods, on which one or plural plates 101 may be placeable. The support bars may be arranged in particular parallel to each other. Reinforcing elements, such as cross braces, may be arranged between the support bars in order to increase the stability of the charging fork.

(24) Furthermore, the support rods may be surrounded at their free end by a sealing element 302. The sealing element 302 may be provided in order to close a corresponding first opening 401 (see FIG. 4). The sealing element 302 may act as a furnace door, so to speak. Furthermore, the sealing element 302 may form a circumferential flange, which may run around the free ends of the corresponding support rods of the charging fork 301. The circumferential flange may be used to be fixed in a first opening 401 of the housing 102, for example by a press connection or by a releasable screw connection. Thus, in an exemplary embodiment, the sealing element 302 may simultaneously contribute to the formation of a support of the positioning device 106.

(25) Furthermore, the positioning device 106 may have a coupling region 303, which may be configured in such a manner that a gripping device may be coupleable thereto for moving (or displacing) the positioning device 106. The coupling region 303 may have, for example, a clamping surface, to which the gripping device may be coupled by corresponding clamping jaws. Furthermore, the coupling region 303 may have, for example, corresponding bolt openings or the like for coupling the gripping device thereto.

(26) FIG. 4 shows a furnace device 100, for example from FIG. 1 in a side view. The housing 102 may have first openings 401, through which the plates 101 are introduceable into the temperature control region 103 along a charging direction 402. The charging direction 402 may describe the direction of the plates 101, along which the latter may be transported into and out of the temperature control region 103, in particular by the corresponding positioning devices 106. The first openings 401 may, for example, be closed selectively by a furnace door. Furthermore, the first openings 401 may be sealed or closed by the corresponding sealing elements 302 of the positioning devices 106.

(27) The positioning devices 106 and the first openings 401 may be embodied in such a manner that the charging direction 402 may be present perpendicular to the flow direction 108. The charging direction 402 and the flow direction 108 may be perpendicular to each other, in particular within a common (in particular horizontal) plane. In this arrangement, the plate 101 may be inserted into the temperature control region 103 directly through the first opening 401 without having to arrange devices for controlling the temperature control fluid between the first opening 401 and the temperature control region 103, since the flow direction 108 and/or the circulation path of the temperature control fluid may run perpendicular to the charging direction 402 and/or past the first opening 401.

(28) In the embodiment example from FIG. 4, the positioning devices 106 may form supports 403 in the respective first openings 401 of the housing 102, by which [supports] the positioning devices 106 may be fixable to the housing 102. The positioning devices 106 may have, for example, sections (for example the sealing element 302), which may be clamped in the respective first opening 401 of the housing 102 or which may, for example, be detachably fixed to the housing 102 by a screw connection. In this way, a firm clamping of the positioning device 106 in the respective first opening 401 may be established. From the respective first openings 401, the positioning devices 106 may then protrude into the temperature control region 103 of the housing 102 in order there to temperature-control the plates 101 accordingly.

(29) The positioning devices 106 may be supported exclusively in the respective first openings 401 of the housing 102, and may protrude from the respective first opening 401 into the temperature control region 103 without any further support points.

(30) Furthermore, the positioning devices 106 may be arranged in the temperature control region 103 in such a manner that the plates 101 may be arranged parallel to each other and in particular one above the other. In the arrangement of the positioning devices 106 being arranged vertically one above the other, the furnace device 100 may thus be designed as a shelf furnace. The temperature control fluid may flow between the positioning devices 106 such that the plates 101 may be temperature-controlled on their respective two surfaces.

(31) The furnace device 100 may furthermore have further partition walls 404 in the temperature control region 103, which may be arranged between the positioning devices 106. Thus, the temperature control region 103 may be divided into temperature control chambers by the further partition walls 404, into which the positioning devices 106 may be movable. The further partition walls 404 may extend, for example, from one side wall of the housing 102, in which the first openings 401 may be formed, to an opposite side wall of the housing 102. In particular, the further partition walls 404 may extend along the charging direction 402. The formed temperature control chambers may each be embodied to be open at their respective inlet regions and outlet regions along the flow direction 108, such that the circulation path of the temperature control fluid may not be interrupted.

(32) FIG. 5 shows a top view of a furnace device 100 according to an exemplary embodiment. The upper adjustment region 104, in which the temperature control device 105 may be located, may be separated from the temperature control region 103 lying therebelow by the partition wall 112. The first openings 401, through which the positioning devices 106 may be retracted, may be formed on a side wall of the housing 102. Furthermore, the ventilator range 111 is shown, in which the temperature control fluid may be driven and directed in the direction towards the adjustment region 104.

(33) Supplementarily, it is noted that “having” does not exclude other elements or steps and “a” or “an” does not exclude a plurality. Furthermore, it should be noted that features or steps, which have been described with reference to one of the above embodiment examples, can also be used in combination with other features or steps of other embodiment examples, which have been described above. Reference numerals in the claims are not to be considered as a limitation.

LIST OF REFERENCE NUMERALS

(34) 100 furnace device 101 plate 102 housing 103 temperature control region 104 adjustment region 105 temperature control device 106 positioning device 107 ventilator 108 flow direction 109 fluid guide region 110 fluid guide element 111 ventilator region 112 partition wall 113 return region 114 return baffle 115 fluid inlet 301 charging fork 302 sealing element 303 coupling region 401 first opening 402 charging direction 403 support 404 further partition wall α angle