Coil changing device, induction heating device and method for changing a coil of such an induction heating device

Abstract

The invention relates to a coil changing device (1) for an induction heating device (40) for heating metallic workpieces (50), an induction heating device (40) for heating metallic workpieces (50) and a method for changing a coil (41, 46) of such an induction heating device (40).

Description

[0001] The present invention relates to a coil-changing device for an induction heating device. Furthermore, the present invention relates to an induction heating device for heating metallic workpieces. Finally, the present invention relates to a method for changing a coil of an induction heating device using a coil-changing device.

[0002] Known induction heating devices for heating continuously moving metallic workpieces have coils that are fixed relative to the metallic workpieces and / or adjustable vertically and / or horizontally to a conveying direction of the metallic workpieces, wherein the metallic workpieces are guided past the respective coil in a conveying direction.

[0003] The coils of conventional induction heating devices are supplied with electrical energy from an electrical power source via power electronic components such as transformers, inverters, rectifiers, and capacitors. This process subjects the coils to thermal stress, causing wear and tear and resulting in a limited lifespan. Therefore, the coils must be replaced at regular intervals.

[0004] Replacing a coil is currently a complex and largely manual process. Firstly, access to the power electronic components required for coil replacement is hampered by the often limited space around these components. Secondly, because the electrical connections must be manually disconnected, coil replacement is only possible when the induction heating devices, and therefore the production line, are shut down. This downtime results in significant production losses.

[0005] The invention is based on the objective of providing a coil changing device for an induction heating device, which can reduce the time required for a coil change and the proportion of manual work involved in a coil change.

[0006] The problem underlying the present invention is solved by a coil-changing device having the features of claim 1. Advantageous embodiments of the coil-changing device are described in the dependent claims.

[0007] More precisely, the problem underlying the present invention is solved by a coil changing device for an induction heating device for heating metallic workpieces, wherein the coil changing device has a receiving device for receiving a coil, wherein the receiving device has a receiving rail for receiving the coil; and a transport device for receiving and transporting a coil, wherein the transport device has a transport rail for receiving the coil.The coil changing device can be moved between a changing position and a transport position by a relative movement between the receiving device and the transport device; and in the changing position of the coil changing device, a coil received by means of the receiving device or received by means of the transport device can be moved between the receiving device and the transport device along a changing rail, wherein the changing rail comprises the receiving rail and the transport rail.

[0008] Where the intended use or application of the coil changing device is described below, this refers to the use and / or application of the coil changing device in conjunction with an induction heating device.

[0009] A coil-changing device designed in this way has the advantage that, when used as intended, it reduces the downtime of the induction heating device when changing one or more coils. When moving one or more coils of the induction heating device into their respective transport and / or operating positions, the coil can be moved along the changing rail, thus reducing the number of manual steps required. Furthermore, after being moved into its transport position and picked up by the transport device, the coil can be accelerated away from the induction heating device.For example, the coil can be transported away from the induction heating device by an actuator, such as an overhead crane, using the transport device. Immediately afterwards, another coil can be transported to the induction heating device using another or the same transport device, so that the coil changing device is in its changing position. In the changing position of the coil changing device, the coil transported by the transport device can be picked up by the receiving device along the changing rail between the transport device and the receiving device and moved into the working position. This reduces the downtime of the induction heating device and simultaneously the manual steps required to change the coil.

[0010] The receiving device can partially or completely define a receiving volume for a coil. The receiving rail can be configured to hold a coil within the receiving device. In other words, the coil can be held within the receiving volume defined by the receiving device by means of the receiving rail. This protects the coil from mechanical damage during transfer between the transport device and the receiving device.

[0011] The transport device can partially or completely limit the transport volume for receiving a coil. The transport rail can be configured to receive a coil within the transport device. In other words, the coil can be held within the transport volume limited by the transport device by means of the transport rail. This protects the coil from mechanical damage during transfer between the transport device and the receiving device. Furthermore, a coil within the transport device can be better protected from mechanical damage during relative movement between the transport device and the receiving device.

[0012] The transport device can be configured to hold more than one coil, preferably two or more coils. The transport device can have a second transport rail for holding an additional coil. When the coil changing device is used as intended, this allows, for example, two differently oriented coils for an induction heating device, such as an upper coil and a lower coil, to be moved relative to the receiving device by means of a transport device, thus speeding up the changing of the coils in the induction heating device and thereby reducing the downtime of the induction heating device.

[0013] The receiving device can be configured to hold more than one coil, preferably two or more coils. The receiving device can have a second receiving rail for holding a further coil. When the coil changing device is used as intended, this allows, for example, two differently oriented coils for an induction heating device, such as an upper coil and a lower coil, to be received by means of the receiving device.

[0014] The receiving rail may have a raised or recessed area in the receiving device, or be formed by such an area. The transport rail may have a raised or recessed area in the transport device, or be formed by such an area.

[0015] The interchangeable rail can be formed by the receiving rail and the transport rail. In other words, the interchangeable rail can consist of the receiving rail and the transport rail.

[0016] The receiving rail and the transport rail can form a continuous changeover rail in the changeover position of the coil changing device.

[0017] In the switching position of the coil-changing device, a first switching rail can have a first receiving rail and a first transport rail. A second switching rail can have a second receiving rail and a second transport rail in the switching position of the coil-changing device.

[0018] A coil picked up by the holding device can only move along the mounting rail relative to the holding device. In other words, a coil picked up by the holding device can only have one degree of freedom relative to the holding device. When the coil changing device is used as intended, this allows a coil picked up by the holding device to be transferred into the transport device with increased safety in the changing position of the coil changing device.

[0019] A coil picked up by the transport device can only move along the transport rail relative to the receiving device. In other words, a coil picked up by the transport device can only have one degree of freedom relative to the transport device. When the coil changing device is used as intended, this allows a coil picked up by the transport device to be transferred into the receiving device with increased safety in the changing position of the coil changing device.

[0020] In the switching position of the coil changing device, the transport device and the receiving device are preferably connected to each other at least indirectly, for example by means of the transport rail and the receiving rail.

[0021] In the transport position of the coil changing device, the transport device and the receiving device are preferably spaced apart from each other in such a way that a coil received by means of the receiving device or by means of the transport device cannot be transferred between the receiving device and the transport device.

[0022] Preferably, the coil changing device is designed such that the changing rail runs in a straight line.

[0023] A coil-changing device designed in this way has the advantage that, when used as intended, a coil can be transferred between the receiving and transporting devices with increased safety and ease while in the changing position of the device. In kinematics, linear motion represents the simplest form of motion of a body and therefore requires no complex control system.

[0024] Preferably, the coil changing device is designed such that, in the changing position of the coil changing device, the transport device is positively connected to the receiving device.

[0025] A coil-changing device designed in this way has the advantage that the transport device and the receiving device, in the changing position of the coil-changing device, maintain a predetermined relative position to each other with increased accuracy. The positive-locking connection between the receiving device and the transport device in the changing position of the coil-changing device effectively prevents deviations from this predetermined relative position. Therefore, when the coil-changing device is used as intended, a coil can be transferred along the changing rail between the receiving device and the transport device with increased reliability.

[0026] The positive locking connection between the receiving device and the transport device can be designed as a snap-fit ​​connection.

[0027] In the switching position of the coil changing device, the transport device can be positively connected to the receiving device.

[0028] Preferably, the coil changing device is designed such that, in the changing position of the coil changing device, the transport rail at least partially surrounds the receiving rail; or, in the changing position of the coil changing device, the receiving rail at least partially surrounds the transport rail.

[0029] A coil-changing device designed in this way has the advantage that the transport device and the receiving device, in the changing position of the coil-changing device, have a predetermined relative position to each other with even greater accuracy. Because the receiving rail partially engages the transport rail, or vice versa, deviations from a predetermined relative position between the receiving and transport devices can be further minimized. Therefore, when the coil-changing device is used as intended, a coil can be transferred along the changing rail between the receiving and transport devices with even greater reliability.

[0030] The receiving rail can have a recess formed in an end face of the receiving rail, the recess having a free cross-section corresponding to a cross-section of the transport rail. When moving the coil-changing device into the changing position, the transport rail can be sectionally received in the recess of the receiving rail and engaged by the receiving rail, so that the transport device is positively connected to the receiving device in the changing position of the coil-changing device.

[0031] The transport rail can have a recess formed in an end face of the transport rail, the recess having a free cross-section corresponding to the cross-section of the receiving rail. When moving the coil-changing device into the changing position, the receiving rail can be section by section received in the recess of the transport rail and engaged by the transport rail, so that the transport device is positively connected to the receiving device in the changing position of the coil-changing device.

[0032] The receiving rail may have a recess formed in one end face. The transport rail may have a projection extending away from one end face. When moving the coil-changing device into the changing position, the projection of the transport rail can engage in the recess of the receiving rail, thus positively connecting the transport device to the receiving device in the changing position. The end face of the receiving rail may be in direct surface contact with the end face of the transport rail.

[0033] The transport rail may have a recess formed in one end face. The receiving rail may have a projection extending away from one end face. When moving the coil-changing device into the changing position, the projection of the receiving rail can be engaged in the recess of the transport rail, thus positively connecting the transport device to the receiving device in the changing position. The end face of the receiving rail may be in direct surface contact with the end face of the transport rail.

[0034] The projection of the receiving rail and / or the projection of the transport rail can be designed as a locking hook and create a residual connection between the transport rail and the receiving rail in the changeover position of the coil changing device.

[0035] Preferably, the coil changing device is designed such that the transport device has a fixing means for reversibly fixing a coil picked up by means of the transport device along the transport rail; and / or the receiving device has a fixing means for reversibly fixing a coil picked up by means of the receiving device along the receiving rail.

[0036] A coil-changing device designed in this way has the advantage that, when used as intended, a coil picked up by the transport device can be moved with increased safety relative to the picking device. Because the coil can be fixed along the transport rail by the fixing means, relative movement between the transport device and the coil picked up by it is impossible, so that the coil cannot move relative to the transport device, regardless of the movement of the transport device, and in particular cannot slip.

[0037] The transport device and / or the receiving device may have more than one fixing device.

[0038] The fixing device can be designed as a bolt, a screw and / or a clamping device.

[0039] Preferably, the coil changing device is designed such that the transport device has one or more than one fastening device, wherein the transport device can be detachably connected to an actuator by means of a fastening device; and the transport device can be moved relative to the receiving device by means of the actuator, so that the coil changing device can be moved between its changing position and its transport position.

[0040] A coil changing device designed in this way has the advantage that it can be moved between its changing position and its transport position in different production environments. This allows the coil changing device to be used flexibly in production and to be moved between its changing and transport positions using actuators already present in production, such as an overhead crane.

[0041] The fastening device may have an anchor point, an eyelet or other receptacle for detachable connection to the actuator.

[0042] The actuator may be an overhead crane, a mobile crane and / or a forklift truck, or may be designed as such.

[0043] Preferably, the coil changing device is designed such that the receiving device is connected to a supply device, wherein the supply device is configured to supply a coil of an induction heating device with electrical energy.

[0044] A coil-changing device designed in this way has the advantage that, when used as intended, a coil picked up by the receiving device can be transferred quickly into its working position. Because the receiving device is connected to a power supply, the coil can be automatically connected electrically to the supply as it is transferred into the receiving device, thus simultaneously and automatically moving the coil into its working position.

[0045] The receiving device can be electrically and / or mechanically connected to the supply device.

[0046] The power supply unit can be configured to supply a plurality of coils with electrical energy.

[0047] The supply device can be connected to an electrical energy source, for example an electrical power grid.

[0048] The supply device is preferably designed to supply a coil with an electric current of suitable amperage, suitable voltage and / or suitable frequency.

[0049] The power supply unit may include a power converter, in particular an inverter. The power supply unit may include one or more transformers and / or one or more rectifiers. The power supply unit may include a capacitor assembly or be electrically connected to one. The capacitor assembly may include a single capacitor or a plurality of capacitors connected in series and / or parallel.

[0050] The problem underlying the invention is further solved by an induction heating device for heating metallic workpieces, comprising at least one first coil that can be moved between a working position and a transport position, wherein the induction heating device has a receiving device for receiving the first coil, wherein the receiving device has a first receiving rail for receiving the first coil.By moving the first coil into its working position, the first coil is picked up by means of the receiving device, wherein the first coil in its working position is electrically connected to a supply device; and by moving the first coil into its transport position, the first coil can be picked up by means of a transport device, wherein the first coil in its transport position is electrically disconnected from the supply device; wherein the first receiving rail enables movement of the first coil along the first receiving rail when moving the first coil between its working position and its transport position relative to the receiving device.

[0051] An induction heating device designed in this way offers the advantage of reduced downtime when changing one or more coils. When moving one or more coils into their respective transport and / or operating positions, the coil can be moved along the first mounting rail. By picking it up with the mounting device, the coil can be automatically connected electrically to the power supply. This reduces the number of manual steps required.

[0052] Preferably, the induction heating device is designed such that the power supply unit is connected to the receiving unit, preferably electrically conductive and / or mechanically. The induction heating device may include the power supply unit.

[0053] The receiving device may have a second receiving rail for receiving the first coil or a second coil.

[0054] In the working position of the first coil, a functional connection can be established between a metallic workpiece and an alternating magnetic field generated by the first coil.

[0055] In the transport position of the first coil, a functional connection between a metallic workpiece and the first coil can preferably not be established.

[0056] Preferably, the induction heating device is designed such that the first receiving rail runs in a straight line.

[0057] An induction heating device designed in this way has the advantage that a coil held by the mounting device can be moved along the first mounting rail with increased safety and, at the same time, in a simplified manner relative to the mounting device. In kinematics, linear motion represents the simplest form of motion of a body and therefore requires no complex control system.

[0058] The second mounting rail can run in a straight line. The first and second mounting rails can run parallel to each other.

[0059] Preferably, the induction heating device is designed such that the receiving device has a fixing means for reversibly fixing the first coil relative to the receiving device along the first receiving rail.

[0060] The induction heating device can have more than one fixing means, in particular two fixing means. A second fixing means can be configured for the reversible fixing of a second coil relative to the receiving device along the second receiving rail.

[0061] The fixing device can be designed as a bolt, a screw and / or a clamping device.

[0062] Preferably, the induction heating device is designed such that the first coil can be moved between its working position and its transport position by means of an electrical and / or hydraulic and / or pneumatic actuator.

[0063] The actuator may be an overhead crane, a mobile crane and / or a forklift truck, or may be designed as such.

[0064] Preferably, the induction heating device has a quick-release coupling device, wherein the quick-release coupling device comprises a first coupling half and a second coupling half corresponding to the first coupling half. The first coupling half has a first main electrical connection device, and the second coupling half has a second main electrical connection device corresponding to the first main electrical connection device.The quick-release coupling device can be moved between an open position and a closed position by a relative movement between the first coupling half and the second coupling half; in the closed position of the quick-release coupling device, the first main electrical connection device is electrically connected to the second main electrical connection device; the at least one first coil can be electrically connected to the supply device by means of the quick-release coupling device; wherein the first main electrical connection device of the first coupling half of the quick-release coupling device is electrically connected to the supply device or to the first coil; wherein the second main electrical connection device of the second coupling half of the quick-release coupling device is electrically connected to the supply device or to the first coil.By moving the first coil into its transport position, the quick-release coupling device is moved into its open position; and by moving the first coil into its working position, the quick-release coupling device is moved into its closed position, so that an electrically conductive connection between the supply device and the first coil is automatically created.

[0065] An induction heating device designed in this way has the advantage that the electrical connection between the first coil and the power supply is established more easily and, in particular, more quickly when the first coil is moved into its operating position. Furthermore, the electrical connection between the first coil and the power supply is also broken more easily and, in particular, more quickly when the first coil is moved into its transport position. This reduces downtime of the induction heating device during coil changes.

[0066] A further advantage of such a designed induction heating device is that it has a reduced number of permanent electrical connections, and in particular no permanent electrical connections, between the first coil and the power supply. Specifically, long cables for the electrical connection of the first coil to the power supply can be dispensed with. This reduces the electrical losses due to current transmission between the power supply and the first coil, thus increasing the efficiency of the induction heating device.

[0067] The quick-release coupling device is preferably movable from the open position to the closed position in a first direction of travel. The quick-release coupling device is preferably movable from the closed position to the open position in a second direction of travel. The second direction of travel is preferably opposite to the first direction of travel.

[0068] In the open position of the quick-release coupling device, the first main electrical connection is preferably electrically isolated from the second main electrical connection. In the closed position of the quick-release coupling device, a current, preferably an alternating current, with a current intensity of greater than or equal to 1000 amperes can be transmitted via the first main electrical connection and the second main electrical connection.

[0069] By moving the quick-coupling device from its open position to its closed position, an electrical connection can be established between the first main electrical connection device and the second main electrical connection device, so that an electric current can be transmitted via the first main electrical connection device and the second main electrical connection device.

[0070] The first coupling half can have a first fixing device and the second coupling half can have a second fixing device corresponding to the first fixing device.

[0071] In the open position of the quick-release coupling device, the first locking device is preferably separated from the second locking device, in particular mechanically separated. The quick-release coupling device is preferably designed such that, in the closed position of the quick-release coupling device, the first locking device is positively connected to the second locking device by a frictional connection and / or by a vacuum connection, preferably by a fluid-mechanical vacuum connection.

[0072] The fluid-mechanical vacuum connection can be designed as a pneumatic and / or hydraulic vacuum connection.

[0073] An induction heating device designed in this way has the advantage that the force-fit connection between the first fixing device and the second fixing device of the quick-coupling device can be established and / or released in a simplified manner.

[0074] The quick-coupling device is preferably designed such that, in the closed position of the quick-coupling device, the first fixing device is additionally positively connected to the second fixing device.

[0075] An induction heating device designed in this way has the advantage that the connection between the first coupling half and the second coupling half of the quick coupling device is even more stable.

[0076] The first fixing device can be a quick-release fastener, and the second fixing device can be a corresponding insertion nipple. In other words, the first and second fixing devices can form components of a quick-release fastener.

[0077] An induction heating device designed in this way has the advantage that the connection between the first coupling half and the second coupling half of the quick coupling device can be established and / or released again more quickly.

[0078] The quick-release coupling device is preferably designed such that the first fixing element has a first recess formed in a first connecting surface of the first coupling half, and that the second fixing element has a first projection extending from a second connecting surface towards the first connecting surface of the first coupling half, preferably orthogonally. When the quick-release coupling device is moved into its closed position, the first projection is engaged in the first recess and behind it, so that the first fixing element is positively connected to the second fixing element in the closed position of the quick-release coupling device.

[0079] An induction heating device designed in this way has the advantage that the connection between the first coupling half and the second coupling half of the quick coupling device is further improved.

[0080] In the closed position of the quick-coupling device, the first connecting surface of the first coupling half is arranged opposite the second connecting surface of the second coupling half and is preferably in at least indirect, preferably direct, contact with it.

[0081] The first depression can be configured as a blind hole. The first depression can have at least one material projection arranged on an inner wall of the first depression, wherein the material projection is configured to engage behind the first projection, preferably in the area of ​​a recess and / or groove of the first projection.

[0082] The first projection can be designed as a cylindrical projection, preferably as a pin or bolt. The first projection can have a recess and / or a groove. The first projection can be engaged by the material projection of the first recess in the area of ​​the recess and / or in the area of ​​the groove.

[0083] The first fixing device can have a second recess formed in the first connecting surface of the first coupling half, and the second fixing device can have a second projection arranged on the second connecting surface of the second fixing device. The second projection can extend from the second connecting surface towards the first connecting surface, preferably orthogonally.

[0084] The first locking device can have a first locking element and / or a second locking element. When the quick-release coupling device is moved into its closed position, the first projection engages in the first recess and the second projection engages in the second recess. The first locking element and the second locking element are each movable between an open position and a locked position. By moving the first locking element into the locked position in the closed position of the quick-release coupling device, the first locking element engages behind the first projection. By moving the second locking element into the locked position in the closed position of the quick-release coupling device, the second locking element engages behind the second projection.

[0085] The first and / or the second locking element is / are preferably movable in a locking element movement direction that runs transversely to the first movement direction of the quick-release coupling device, between an open position and a locking position. The locking element movement direction is preferably orthogonal to the first movement direction of the quick-release coupling device.

[0086] Preferably, the first main electrical connection device is arranged on the first connecting surface of the first coupling half, and the second main electrical connection device is preferably arranged on the second connecting surface of the second coupling half. The first main electrical connection device and the second main electrical connection device can be designed as electrical contact plates.

[0087] The first coupling half can have a first guide device and the second coupling half can have a second guide device corresponding to the first guide device, and the first coupling half and the second coupling half can be guided by the first guide device and the second guide device with respect to at least one transverse direction to the first direction of travel when the quick coupling device is moved into its closed position, preferably guided in a centered manner.

[0088] An induction heating device designed in this way has the advantage that the first main electrical connection can be connected to the second main electrical connection with improved accuracy. This allows an electric current to be transmitted with reduced losses via the first and second main electrical connections.

[0089] Preferably, when the quick-release coupling device is moved into the closed position, the first and second coupling halves are guided by the first and second guide devices such that, in the closed position of the quick-release coupling device, they are centered relative to each other with respect to at least one transverse direction. This transverse direction is preferably orthogonal to the first direction of travel of the quick-release coupling device.

[0090] An induction heating device designed in this way has the advantage that the first main electrical connection is connected to the second main electrical connection with even greater accuracy. This allows an electric current to be transmitted with further reduced losses via the first and second main electrical connections.

[0091] The first guide device and the first fixing device can be designed as a single component. The second guide device and the second fixing device can also be designed as a single component.

[0092] In particular, the first guiding device and the first fixing device can be monolithically connected to each other. In particular, the second guiding device and the second fixing device can be monolithically connected to each other.

[0093] The first guiding device can be designed as an entry section of a recess of the first fixing device.

[0094] The entrance section of the depression can have a larger free cross-section than the remaining section of the depression. The free cross-section of the entrance section can transition smoothly into the free cross-section of the remaining section of the depression.

[0095] The second guide device can be designed as a conically tapered end section of a projection, in particular a cylindrical projection, of the second fixing device.

[0096] The first coupling half can have a first fluid connection device and the second coupling half can have a second fluid connection device corresponding to the first fluid connection device, wherein in the closed position of the quick coupling device the first fluid connection device is fluidly connected to the second fluid connection device.

[0097] An induction heating device designed in this way has the advantage that, when the quick-release coupling is moved into its closed position, a fluid connection between the first and second coupling halves is automatically established. For example, a cooling fluid can be transferred in this way to cool electrical conductors. Furthermore, it may also be possible, for example, to transfer process fluids in general.

[0098] The first fluid connection device and the second fluid connection device can be designed to transfer hydraulic oil, cooling fluid (e.g. cooling water), compressed air or other fluids between the first coupling half and the second coupling half.

[0099] The first coupling half can have a first electrical auxiliary connection device and the second coupling half can have a second electrical auxiliary connection device corresponding to the first electrical auxiliary connection device, wherein in the closed position of the quick coupling device the first electrical auxiliary connection device is electrically conductively connected to the second electrical auxiliary connection device.

[0100] An induction heating device designed in this way has the advantage that when the quick-release coupling is moved into its closed position, an additional electrical connection for supplying auxiliary components of the induction heating device is automatically established. Furthermore, the induction heating device has an even reduced number of permanent connections between the first coil and the power supply unit. This further reduces downtime of the induction heating device.

[0101] In the closed position of the quick-coupling device, one or more auxiliary components can be supplied with electrical energy through the electrically conductive connection between the first electrical auxiliary connection device and the second electrical auxiliary connection device.

[0102] An auxiliary component can be designed as a cooling device, as a display device for electronic control devices, as motion actuators and / or as other auxiliary components of an induction heating device.

[0103] Two corresponding components (for example, the first coupling half and the second coupling half, the first fixing device and the second fixing device, the first main electrical connection device and the second main electrical connection device, the first guide device and the second guide device, the first auxiliary electrical connection device and the second auxiliary electrical connection device) can be brought into an operative connection or enter into such a connection. In particular, two corresponding components can be brought into a mechanical and / or electrical and / or fluid-mechanical operative connection or enter into such a connection.

[0104] The first coupling half can have a first protective device to protect it from contamination. This first protective device can be moved between an open and a closed position. In the closed position, the first protective device at least partially covers the first connecting surface of the first coupling half. When the quick-release coupling is moved into its closed position, the first protective device can be automatically moved to its open position mechanically, electrically, pneumatically, and / or hydraulically. In other words, moving the quick-release coupling into its closed position automatically triggers the movement of the first protective device into its open position. The first protective device can be designed as a mechanically movable housing.A quick-coupling device designed in this way has the advantage that the first connecting surface of the first coupling half is protected against environmental influences, especially against dirt.

[0105] The second coupling half can have a second protective device to protect it from contamination. This second protective device can be moved between an open and a closed position. In the closed position, it at least partially covers the second connecting surface of the second coupling half. The second protective device can be automatically moved to its open position mechanically, electrically, pneumatically, and / or hydraulically when the quick-release coupling is moved to its closed position. In other words, moving the quick-release coupling to its closed position automatically triggers the second protective device to move to its open position. The second protective device can be designed as a mechanically movable housing.

[0106] Alternatively or additionally, the second coupling half can have an actuating device corresponding to the first protective device of the first coupling half. When the quick-release coupling is moved into its closed position, the actuating device of the second coupling half actuates the first protective device of the first coupling half through mechanical contact, thus moving the first protective device into its open position. In other words, there is a mechanical interaction between the first protective device of the first coupling half and the actuating device of the second coupling half when the quick-release coupling is moved into its closed position. The actuating device can have at least one, preferably two, actuating projections extending from the second coupling half towards the first coupling half.The actuating projection can be designed as a pin or bolt.

[0107] The quick-coupling device is preferably designed such that the quick-coupling device can be moved between an open position and a closed position by means of a translational relative movement and / or by means of a rotational relative movement between the first coupling half and the second coupling half.

[0108] The first coupling half or the second coupling half of the quick coupling device can be arranged on the receiving device and / or connected to it, preferably mechanically and / or electrically.

[0109] By moving the first coil into its working position, the quick-coupling device can simultaneously be moved into its closed position. By moving the first coil into its working position, the first coil can simultaneously be picked up by the receiving device.

[0110] An induction heating device designed in this way has the advantage that the electrical connection between the first coil and the power supply can be made more quickly and with less effort when moving the first coil into its operating position. This further reduces downtime for the induction heating device.

[0111] Alternatively, by moving the first coil into its working position, the quick-coupling device can be moved into its closed position with a time delay, in particular a subsequent time delay.

[0112] By moving the first coil into its transport position, the first coil can be picked up simultaneously by the transport device.

[0113] An induction heating device designed in this way has the advantage that changing the coils can be carried out even faster.

[0114] In the transport position of the first coil, the quick-release coupling device is preferably in its open position. In the working position of the first coil, the quick-release coupling device is preferably in its closed position.

[0115] The first coil can be moved between its transport position and its working position by means of a translational movement. Alternatively or additionally, the first coil can be moved between its transport position and its working position by means of a rotational movement.

[0116] The first coil can be moved along a first coil travel direction and / or a second coil travel direction between its working position and its transport position.

[0117] The first coil movement direction can be collinear or parallel to the first movement direction of the quick-release coupling device. The second coil movement direction can be collinear or parallel to the second movement direction of the quick-release coupling device. In particular, the electrical connection between the first coil and the power supply can only be established and / or disconnected by moving the first coil between its transport position and its operating position.

[0118] An induction heating device designed in this way has the advantage that an electrical connection between the power supply and the first coil can be established with a reduced number of movements, particularly with a reduced number of movements in different directions. This allows the electrical connection between the first coil and the power supply to be established and / or broken even more quickly.

[0119] Preferably, the induction heating device has a second coil that can be moved between a working position and a transport position; by moving the second coil into its working position, the second coil is received by means of the receiving device, wherein the second coil in its working position is electrically connected to a supply device; and by moving the second coil into its transport position, the second coil can be received by means of a transport device, wherein the second coil in its transport position is electrically disconnected from the supply device; wherein the receiving device has a second receiving rail for receiving the second coil, and wherein the second receiving rail allows movement of the second coil along the second receiving rail when moving the second coil between its working position and its transport position relative to the receiving device.

[0120] The induction heating device can have a further quick-coupling device, wherein the at least one second coil can be electrically connected to the supply device by means of the further quick-coupling device; wherein by moving the second coil into its transport position, the further quick-coupling device is moved into its open position; and wherein by moving the second coil into its working position, the further quick-coupling device is moved into its closed position, so that an electrically conductive connection between the supply device and the second coil is automatically created.

[0121] The first coupling half or the second coupling half of the further quick-coupling device can be arranged on the receiving device and / or connected to it, preferably mechanically and / or electrically.

[0122] Preferably, the induction heating device is designed such that the first coil and the second coil can be moved independently of each other between their working position and their transport position.

[0123] An induction heating device designed in this way offers the advantage that coil replacement can be better tailored to the wear condition of a coil. The thermal loads acting on the coils during operation of an induction heating device can vary considerably, resulting in different rates of wear and consequently, the coils reaching their respective service life limits at different times. Replacing individual coils allows this to be better accommodated, thus maximizing the service life of the coils and effectively reducing operating costs for the induction heating device.

[0124] Preferably, the induction heating device is designed such that the first coil and the second coil are arranged opposite each other in their working position, so that a metallic workpiece can be positioned and / or moved between the first coil and the second coil.

[0125] The induction heating device can be configured to generate a longitudinal magnetic field and / or a transverse magnetic field.

[0126] Preferably, the induction heating device has a previously described coil changing device, wherein the receiving device of the induction heating device corresponds to the receiving device of the coil changing device.

[0127] The problem underlying the invention is further solved by a method for changing a coil of a previously described induction heating device using a previously described coil changing device, wherein the method comprises the following steps: - Moving the first coil into its transport position; - Transporting the first coil in the transport device to a changeover area; - Transporting another coil in the same or a separate transport device to the induction heating device; and - Transferring the next coil into its working position.

[0128] The process may include the following steps: - Disconnecting a connection, in particular an electrical connection, between the first coil and / or the second coil and the power supply unit; - Disconnecting a connection between the receiving device and the transport device; - Connecting the same or a further transport device to the receiving device; - Establishing a connection, in particular an electrical connection, between the further coil and the power supply unit; and - Disconnecting a connection between the receiving device and the same or subsequent transport device.

[0129] By moving the first coil and / or the second coil into their transport position, the quick-coupling device and / or the further quick-coupling device can be moved into their open position.

[0130] Further advantages, details, and features of the invention will become apparent from the exemplary embodiments described below. Specifically, the following will be shown: Fig. 1: a schematic representation of a coil changing device according to a first embodiment in its changing position; Fig. 2: a schematic representation of the coil changing device according to the first embodiment in its transport position; Fig. 3: a schematic representation of a quick-coupling device according to a second embodiment in its open position; Fig. 4: a schematic representation of the quick-coupling device according to the second embodiment in its closed position; Fig. 5: a schematic representation of an induction heating device according to a third embodiment with a coil changing device in its changing position; and Fig. 6: a schematic representation of the induction heating device according to the third embodiment with the coil changing device in its transport position.

[0131] In the following description, identical reference numerals denote identical components or identical features, so that a description of a component given in relation to one figure also applies to the other figures, thus avoiding repetitive descriptions. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0132] Fig. Figure 1 shows a coil changing device 1 for a Fig. 1 Induction heating device 40 (not shown) according to a first embodiment in its alternating position. One embodiment of the induction heating device 40 is shown in the Fig. 5 and Fig. Figure 6 shows the coil changing device 1. The coil changing device 1 has a receiving device 2 for receiving a coil 41, 46, wherein the receiving device 2 has a first receiving rail 3 for receiving the first coil 41 and a second receiving rail 3 for receiving the second coil 46. The coil changing device 1 has a transport device 5 for receiving and transporting the coils 41, 46, wherein the transport device 5 has a transport rail 6 for receiving the coils 41, 46. The coil changing device 1 is driven by a relative movement between the receiving device 2 and the transport device 5 between the coils 41, 46 and the coils 41, 46. Fig. 1 shown change position and one in Fig. 2 transport positions shown.

[0133] In the changeover position of the coil-changing device 1, a coil 41, 46, which has been picked up by means of the receiving device 2 or by means of the transport device 5, can be transferred between the receiving device 2 and the transport device 5 along a changeover rail 9, wherein the changeover rail 9 comprises one of the receiving rails 3 and the transport rail 6. The Fig. 1 The second coil 46 shown can be transferred from the transport device 5 along a first coil travel direction R1 into the receiving device 2 and along a second coil travel direction R2 opposite to the first coil travel direction R1 from the receiving device 2 into the transport device 5.

[0134] The receiving device 2 partially delimits a receiving volume 4, wherein the first coil 41 is received in the receiving volume 4 of the receiving device 2. The transport device 5 delimits a transport volume 6, wherein the second coil 46 is fully received in the transport volume 6. In the Fig. In the changing position of the coil changing device 1 shown in Figure 1, the second coil is transferred from the transport device 5 along the changing rail 9 into the receiving device 2 and is received by the second receiving rail 3.

[0135] In the Fig. In the alternating position of the coil changing device 1 shown in Figure 1, the transport rail 6 partially engages the second receiving rail 3 and is thereby positively connected to it. The transport device 5 has a fastening device 8, wherein the transport device 5 is attached to a surface by means of the fastening device 8. Fig. 1 actuator (not shown) is detachably connectable, and movable relative to the receiving device 2 by means of the actuator, so that the coil changing device 1 can be moved between its Fig. 1 shown change position and its in Fig. The transport position shown in section 2 can be transferred. In the switching position of the coil changing device 1, the transport device 5 is mechanically connected to the receiving device 2 by means of its receiving rail 3 via its transport rail 6.

[0136] Fig. Figure 2 shows the coil-changing device 1 according to the first embodiment in its transport position. In the transport position of the coil-changing device 1, the transport device 5 and the receiving device 2 are spaced apart from each other such that a coil 41, 46 picked up by means of the receiving device 2 or by means of the transport device 5 cannot be transferred between the receiving device 2 and the transport device 5.

[0137] Fig. Figure 3 shows a quick-coupling device 10 according to a second embodiment for a Fig. Figure 3 shows an induction heating device 40 (not shown) in its open position. The quick-release coupling device 10 has a first coupling half 20 with a first connecting surface 21. The first coupling half 20 has a first fixing device 23 and a first main electrical connection device 22, wherein the first fixing device 23 and the first main electrical connection device 22 are arranged on the first connecting surface 21. The quick-release coupling device 10 further has a second coupling half 30 with a second connecting surface 31. The second coupling half 30 has a second fixing device 33 corresponding to the first fixing device 23 and a second main electrical connection device 32 corresponding to the first main electrical connection device 22.The second fixing device 33 and the second main electrical connection device 32 are arranged on the second connection surface 31 of the second coupling half 30.

[0138] The quick-coupling device 10 is connected by a relative movement between the first coupling half 20 and the second coupling half 30 between their respective Fig. 3 disclosures shown and one in Fig. The quick-release coupling device 10 can be moved from its open position to its closed position by a relative movement of the first coupling half 20 and the second coupling half 30 in a first direction of travel R1, and from its closed position to its open position by a relative movement of the first coupling half 20 and the second coupling half 30 in a second direction of travel R2.

[0139] In the open position of the quick-coupling device 10, the first fixing device 23 is mechanically separated from the second fixing device 33 and the first electrical main connection device 22 is electrically separated from the second electrical main connection device 32.

[0140] When transferring the quick-coupling device 10 into its Fig. In the closed position shown in section 4, the first main electrical connection device 22 is electrically connected to the second main electrical connection device 32.

[0141] The first fixing device 23 has a first recess 231 and a second recess 232, each formed in the first connecting surface 21 of the first coupling half 20. The second fixing device 33 has a first projection 331 extending orthogonally from the second connecting surface 31 of the second coupling half 30 towards the first connecting surface 21 of the first coupling half 20, and a second projection 332 extending orthogonally from the second connecting surface 31 of the second coupling half 30 towards the first connecting surface 21. The first projection 331 and the second projection 332 are each formed as cylindrical projections.

[0142] The first fixing device 23 has a first fixing element 233 and a second fixing element 234. When transferring the quick-coupling device 10 into its Fig. In the closed position shown in Figure 4, the first projection 331 is engaged in the first recess 231 and the second projection 332 in the second recess 232. The first fixing element 233 and the second fixing element 234 are movable between an open position and a locking position in a fixing element travel direction that runs transversely to the first travel direction R1.

[0143] The first coupling half 20 has a first guide device 24, and the second coupling half 30 has a second guide device 34 corresponding to the first guide device 24. When the quick-coupling device 10 is moved into its closed position, the first coupling half 20 and the second coupling half 30 are guided in a centered position with respect to at least one transverse direction to the first direction of travel R1.

[0144] The first guide element 24 is designed as an entry section of the first recess 231 of the first fixing element 23 and has a larger free cross-section than a remaining section of the first recess 231. The second guide element 34 is designed as a conically tapered end section of the first projection 331. The first projection 331 and the second projection 332 each have a groove 333, 334.

[0145] The first coupling half 20 also has a first fluid connection device 25, which is arranged on the first connection surface 21 of the first coupling half 20. The second coupling half 30 also has a second fluid connection device 35 corresponding to the first fluid connection device 25, which is arranged on the second connection surface 31 of the second coupling half 30.

[0146] The first coupling half 20 has a first protective device 26 for protecting the first coupling half 20 from contamination. The first protective device 26 can be moved between an open position and a closed position. In the Fig. In the closing position of the first protective device 26 shown in Figure 3, the first protective device 26 covers the first connecting surface 21 of the first coupling half 20. The first protective device 26 is engaged when the quick-coupling device 10 is moved into its Fig. The quick-release coupling device 10 is automatically mechanically transferred from the closed position shown in section 4 to the open position of the first safety device 26. The second coupling half 30 has an actuating device 36 corresponding to the first safety device 26. When the quick-release coupling device 10 is transferred to its open position, the first safety device 26 is automatically mechanically transferred to the open position. The second coupling half 30 has an actuating device 36 corresponding to the first safety device 26. Fig. In the closed position shown in Figure 4, the actuating device 36 actuates the first protective device 26 of the first coupling half 20 by mechanical contact between the actuating device 36 and the first protective device 26, so that the first protective device 26 is moved into its open position. The actuating device 36 has two actuating projections extending from the second coupling half 30 towards the first coupling half 20.

[0147] Fig. Figure 4 shows the quick-coupling device 10 according to the second embodiment in its closed position. The first protective device 26 is in its open position.

[0148] The first main electrical connection device 22 is in electrical contact with the second main electrical connection device 32.

[0149] The first connecting surface 21 of the first coupling half 20 is arranged opposite the second connecting surface 31 of the second coupling half 30.

[0150] The first projection 331 is engaged in the first recess 231, and the second projection 332 is engaged in the second recess 232. The first locking element 233 and the second locking element 234 are each in their respective locking positions. The first locking element 233 engages behind the first projection 331 in its groove 333. The second locking element 234 engages behind the second projection 332 in its groove 334. The first locking device 233 is thus positively and frictionally connected to the second locking device 333.

[0151] Fig. Figure 5 shows an induction heating device 40 according to a third embodiment. The induction heating device 40 has a coil changing device 1 according to the first embodiment and four quick-coupling devices 10 according to the second embodiment. For the sake of clarity, the following are shown in the Fig. 5 and Fig. 6. Only two quick-coupling devices 10 are marked with reference numbers. However, it is explicitly stated that four quick-coupling devices 10 are present.

[0152] The induction heating device 40 comprises a first coil 41, a second coil 46, and a power supply unit 42. The first coupling halves 20 of each of the four quick-connect coupling devices 10 are connected to the receiving device 2. Furthermore, the first main electrical connection devices 22 of the first coupling halves 20 are each electrically connected to the power supply unit 42. Two of the four second coupling halves 30 are connected to the first coil 41, and two further second coupling halves 30 are connected to the second coil 46. The second main electrical connection devices 32 are electrically connected to the first coil 41 and the second coil 46.

[0153] In Fig. In position 5, the first coil 41 is in its working position and the second coil 46 is in its transport position. In the Fig. In the working position of the first coil 41 shown in Figure 5, the first coil 41 is electrically connected to the supply unit 42 by means of two of the quick-coupling devices 10. In the working position of the first coil 41, an electrical connection can be established between a metallic workpiece 50 conveyed in a conveying direction F and an alternating magnetic field generated by the first coil 41.

[0154] The second coil 46 is in their in Fig. The transport position shown in section 5 is electrically isolated from the supply unit 42. By transferring the second coil 46 from its position in Fig. 5 transport position shown in their in Fig. In the working position shown in Figure 6, the second coil 46 is transferred from the transport device 5 to the receiving device 2. Simultaneously, the quick-release coupling devices 10 associated with the second coil 46 are moved into their closed position, thus automatically creating an electrically conductive connection between the supply device 42 and the second coil 46. The second coil 46 is moved along the first coil travel direction S1 from its transport position to its working position, and the quick-release coupling devices 10 are moved from their open position along the first travel direction R1 to their closed position, with the coil travel direction S1 and the travel direction R1 being the same.

[0155] In Fig. 6 the second coil 46 is also in its working position and the coil changing device 1 is in its transport position.

[0156] By transferring the second coil 46 from its into Fig. 6 depicted work position in their in Fig. In the transport position shown in Figure 5, the second coil 46 is transferred from the receiving device 2 to the transport device 5. Simultaneously, the quick-release coupling devices 10 associated with the second coil 46 are moved to their open position, thus automatically disconnecting the electrically conductive connection between the supply device 42 and the second coil 46. The second coil 46 is moved from its working position to its transport position along the second coil travel direction S2, and the quick-release coupling devices 10 are moved from their closed position to their open position along the second travel direction R2, where the coil travel direction S2 and the travel direction R2 are the same. Reference symbol list 1 Coil changing device 2. Receiving facility 3 First / second mounting rail 4 Recording volume 5 Transport equipment 6 Transport rail 7 Transport volume 8 Fastening device 9 interchangeable rails 10 Quick coupling device 20 First clutch half 21 First connecting surface (of the first coupling half) 22 First main electrical connection device 23 First fixing device 231 First in-depth study 232 Second In-depth Study 233 First fixing element 234 Second fixing element 24 First command facility 25 First fluid connection device 26 First protective device 30 Second clutch half 31 Second connecting surface (of the second coupling half) 32 Second main electrical connection device 33 Second fixing device 331 First lead 332 Second lead 333 Nut (of the first lead) 334 Nut (of the second lead) 34 Second guidance system 35 Second fluid connection device 36 Actuating device 40 Induction heating device 41 First coil 42 Supply facility 46 Second coil 50 Metallic workpiece R1 First direction of travel R2 Second direction of travel S1 First coil direction S2 Second coil direction F Conveyor direction

Claims

[1] Coil changing device (1) for an induction heating device (40) for heating metallic workpieces (50), wherein the coil changing device (1) has the following features: - the coil changing device (1) has a receiving device (2) for receiving a coil (41, 46), wherein the receiving device (2) has a receiving rail (3) for receiving the coil (41, 46); - the coil changing device (1) has a transport device (5) for receiving and transporting a coil (41, 46), wherein the transport device (5) has a transport rail (6) for receiving the coil (41, 46); - the coil changing device (1) can be moved between a changing position and a transport position by a relative movement between the receiving device (2) and the transport device (5); and - in the changing position of the coil changing device (1) a coil (41, 46) received by means of the receiving device (2) or received by means of the transport device (5) can be transferred between the receiving device (2) and the transport device (5) along a changing rail (9), wherein the changing rail (9) has the receiving rail (3) and the transport rail (6). [2] Coil changing device (1) according to claim 1, characterized by , that the changeover rail (9) runs in a straight line. [3] Coil changing device (1) according to one of the preceding claims, characterized by , that in the switching position of the coil changing device (1) the transport device (5) is positively connected to the receiving device (2). [4] Coil changing device (1) according to one of the preceding claims, characterized by the following features: - in the switching position of the coil changing device (1), the transport rail (6) engages the receiving rail (3) at least partially; or - in the switching position of the coil changing device (1) the receiving rail (3) encompasses the transport rail (6) at least section by section. [5] Coil changing device (1) according to one of the preceding claims, characterized by the following features: - the transport device (5) has a fixing means for reversibly fixing a coil (41, 46) picked up by means of the transport device (5) along the transport rail (6); and / or - the receiving device (2) has a fixing means for reversibly fixing a coil (41, 46) received by means of the receiving device (2) along the receiving rail (3). [6] Coil changing device (1) according to one of the preceding claims, characterized by the following features: - the transport device (5) has one or more fastening devices (8), wherein the transport device (5) can be detachably connected to an actuator by means of a fastening device (8); and - the transport device (5) can be moved relative to the receiving device (2) by means of the actuator, so that the coil changing device (1) can be moved between its changing position and its transport position. [7] Coil changing device (1) according to one of the preceding claims, characterized by , that the receiving device (2) is connected to a supply device (42), wherein the supply device (42) is configured to supply electrical energy to a coil (41, 46) of an induction heating device (40). [8] Induction heating device (40) for heating metallic workpieces (50), comprising at least one first coil (41) that can be moved between a working position and a transport position, wherein the induction heating device (40) is characterized by the following features: - the induction heating device (40) has a receiving device (2) for receiving the first coil (41), wherein the receiving device (2) has a first receiving rail (3) for receiving the first coil (41); - by moving the first coil (41) into its working position, the first coil (41) is received by means of the receiving device (2), wherein the first coil (41) in its working position is electrically connected to a supply device (42); and - by transferring the first coil (41) into its transport position, the first coil (41) can be picked up by means of a transport device (5), wherein the first coil (41) is electrically separated from the supply device (42) in its transport position; - wherein the first receiving rail (3) enables movement of the first coil (41) when transferring the first coil (41) between its working position and its transport position relative to the receiving device (2) along the first receiving rail (3). [9] Induction heating device (40) according to claim 8, characterized by , that the first mounting rail (3) runs in a straight line. [10] Induction heating device (40) according to claim 8 or claim 9, characterized by , that the receiving device (2) has a fixing means for reversibly fixing the first coil (41) relative to the receiving device (2) along the first receiving rail (3). [11] Induction heating device (40) according to one of claims 8 to 10, characterized by , that the first coil (41) can be moved between its working position and its transport position by means of an electrical and / or hydraulic and / or pneumatic actuator. [12] Induction heating device (40) according to one of claims 8 to 11, characterized by the following features: - the induction heating device (40) has a quick-coupling device (10), wherein the quick-coupling device (10) has a first coupling half (20) and a second coupling half (30) corresponding to the first coupling half; - the first coupling half (20) has a first main electrical connection device and the second coupling half (30) has a second main electrical connection device corresponding to the first main electrical connection device; - the quick-coupling device (10) can be moved between an open position and a closed position by a relative movement between the first coupling half and the second coupling half; - in the closed position of the quick-coupling device (10) the first main electrical connection device is electrically conductively connected to the second main electrical connection device; - at least one first coil (41) can be electrically connected to the supply unit (42) by means of the quick-coupling device (10); - wherein the first main electrical connection device of the first coupling half of the quick coupling device (10) is electrically connected to the supply device (42) or to the first coil (41); - wherein the second main electrical connection device of the second coupling half of the quick coupling device (10) is electrically conductively connected to the supply device (42) or to the first coil (41); - by moving the first coil (41) into its transport position, the quick-release coupling device (10) is moved into its open position; and - By moving the first coil (41) into its working position, the quick-coupling device (10) is moved into its closed position, so that an electrically conductive connection between the supply device (42) and the first coil (41) is automatically created. [13] Induction heating device (40) according to one of claims 8 to 12, characterized by the following features: - the induction heating device (40) has a second coil (46) that can be moved between a working position and a transport position; - by moving the second coil (46) into its working position, the second coil (46) is received by means of the receiving device (2), wherein the second coil (46) in its working position is electrically connected to a supply device (42); and - by transferring the second coil (46) into its transport position, the second coil (46) can be picked up by means of a transport device (5), wherein the second coil (46) is electrically separated from the supply device (42) in its transport position; - wherein the receiving device (2) has a second receiving rail (3) for receiving the second coil (46), and wherein the second receiving rail (3) enables movement of the second coil (46) when transferring the second coil (46) between its working position and its transport position relative to the receiving device (2) along the second receiving rail (3). [14] Induction heating device (40) according to claim 13, characterized by , that the first coil (41) and the second coil (46) can be moved independently of each other between their working position and their transport position. [15] Induction heating device (40) according to claim 13 or claim 14, characterized by , that the first coil (41) and the second coil (46) are arranged opposite each other in their working position, so that a metallic workpiece (50) can be positioned and / or moved between the first coil (41) and the second coil (46). [16] Induction heating device (40) according to any one of claims 8 to 15, characterized by , that the induction heating device (40) has a coil changing device (1) according to one of claims 1 to 7, wherein the receiving device (2) of the induction heating device (40) corresponds to the receiving device (2) of the coil changing device (1). [17] Method for changing a coil of an induction heating device (40) according to claim 16 using a coil changing device (1) according to any one of claims 1 to 7, wherein the method comprises the following steps: - Transferring the first coil (41) into its transport position; - Transporting the first coil (41) in the transport device (5) to a changeover area; - Transporting another coil in the same or a further transport device (5) to the induction heating device (40); and - Transferring the next coil into its working position.

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