DE102015104492A1 - Coating device for coating a workpiece surface of a workpiece - Google Patents

Abstract

The invention relates to a coating device (15) for coating at least one workpiece surface, in particular a cylindrical bore. The coating device (15) has at least one storage unit (16) for storing at least one wire (20). At least one of the existing storage devices (16) is rotatably mounted about a working axis (A). A coating unit (17) is connected to the storage unit (16) rotatably mounted about the working axis (A) or can be connected via a coupling device (37). The coating unit (17) has a coating tool (23) to which the at least one wire (20) is fed via at least one wire channel (21) and by means of at least one wire feed device (27, 28). Furthermore, the coating device (15) has a process gas supply arrangement (29). To this belongs a rotary feeder (46) which is fluidically connected to a gas channel (30) of the coating device (15). The gas channel (30) leads from the rotary feeder (46) to the coating tool (23). The rotary feeder (46) sits in the region of the storage unit (16) and is preferably, viewed in a wire feed direction (D), arranged axially in front of an inlet mouth (22) of the at least one wire channel (21).

Description

The invention relates to a coating device for coating a workpiece surface of a workpiece. For example, with such a coating apparatus, the inside of a recess or bore, such as a piston running surface of a cylinder bore, can be coated.

A coating device is eg in DE 10 2010 060 652 A1 described. In such coating apparatus, a coating tool is inserted along a working axis of a bore. The coating tool is moved along the working axis and simultaneously rotated about this working axis. In this case, a coating material is ejected substantially in the radial direction and applied to the inner surface of the bore. The ejected coating material is formed by melting at least one metal-comprising wire in a heating device, for example an arc, of the coating tool and blowing it out via a process gas or carrier gas.

The problem with rotating tools is the supply of media or electrical energy. It must be made a connection between rotating parts and non-rotating parts. These compounds are subject to wear during operation of the coating device. It has been found that known coating devices do not always meet the desired requirements in terms of wear.

It can therefore be regarded as an object of the present invention to provide an improved coating apparatus in which less wear of a process gas supply arrangement is achieved.

This object is achieved by a coating device with the features of claim 1 or with the features of claim 9.

The coating device according to the invention has a rotatably drivable coating unit with a coating tool. Via a drive, for example an electric motor, which can be coupled to the coating unit via a drive means, the coating unit is rotationally driven about a working axis. The coating tool has an obliquely or radially aligned to the working axis ejection port, is ejected from the coating material. By a rotational movement about the working axis and a feed movement along the working axis coating material can be ejected in circular or helical paths on a workpiece surface, in particular an inner surface of a cylindrical bore. Such coating devices are used, for example, in the coating of running surfaces in cylinders of an internal combustion engine.

The coating device has at least one storage unit. The storage unit has a receiving space in which at least one metal-containing wire is stored. The at least one wire is conveyed out of the storage unit to the coating tool via one or more wire feed devices.

In a first solution according to the invention, the coating device has a coupling device which is set up to provide a detachable coupling between the storage unit and the coating unit at a coupling point. By means of the coupling device, a preferably automated separation or coupling of the storage unit from or with the coating unit can take place. This configuration allows a manual or automated change of the storage unit, for example, when the wire supply for the coating tool is used up. However, the coupling device can also be provided if no automatic change of the memory unit is provided.

The coating apparatus also has a process gas supply arrangement with a rotary feed. The rotary feeder is arranged along the working axis or coaxially to the working axis. It allows the supply of a process gas from a stationary gas connection or a stationary gas line to the rotating coating unit or the rotating coating tool. The rotary feeder is arranged on the side of the coupling point on which the storage unit is located, while the coating unit is arranged on the other side of the coupling point. Viewed in a wire feed direction axially along the working axis or viewed in a process gas supply direction axially along the working axis, the rotary feeder is located axially in front of the coating unit.

When arranging the rotary feeder at this point, small diameter of the relatively rotating parts of the rotary feeder can be realized. This has the advantage that at a predetermined speed, a sufficiently low relative speed between the rotating parts of the rotary feed is achieved. This reduces wear. Required seals the rotary feeder thus have a longer life.

In addition, the inventive positioning of the rotary feeder allows improved accessibility, which facilitates replacement of the rotary feeder or components of the rotary feeder and downtime of the coating device depending on the embodiments described below, either reduced or eliminated completely.

The rotary feeder is preferably arranged on the storage unit. In a preferred embodiment, it can be arranged on the axial end of the storage unit opposite the coating tool.

In a second solution according to the invention, a coating device without a coupling device is provided. The storage unit and the coating unit are connected to each other. An automatic change of the storage unit is not provided here.

At least one wire channel leads from the storage unit to the coating unit or to the coating tool. The wire channel has an entrance mouth in the area where the at least one wire is stored.

The rotary feeder is viewed axially along the working axis in a wire feed direction or viewed axially in a process gas supply direction in front of the entrance mouth of the wire channel.

The position of the rotary feeder axially in front of the entrance mouth of the wire channel can also be provided in the coating device with coupling device according to the first solution according to the invention.

The rotary feeder is arranged at a location of the coating device on which no wire channel or other cable ducts for electrical lines run in the region of the axis of rotation. This makes it possible to minimize the diameter of the rotary feeder. As explained in connection with the first solution according to the invention, relative speeds between two mutually rotatable parts of the rotary feeder can be reduced at a predetermined speed and the wear can be reduced.

In all the exemplary embodiments and solutions according to the invention, it is advantageous if the process gas is passed exclusively axially through the rotary feeder without wires, electrical lines or other media being guided through the rotary feeder. This not only allows the minimization of the diameter of the rotating parts of the rotary feeder, but also simplifies the removal and installation of the rotary feeder. In particular, in this embodiment, no electrical lines or wires carried through must be dismantled to allow access to the rotary feeder and the replacement of sealing components.

If a coupling device is present, it is advantageous that the coupling device has a coupling unit arranged on the memory unit and a negative feedback unit arranged on the coating unit. The coupling unit and the negative feedback unit can preferably produce a releasable connection with each other without tools and / or automatically, in particular by an axial movement along the working axis. To carry out this relative movement, for example, a separate coupling drive can be used, as well as a drive device of a changing device, which can perform an automated change of the storage unit. By such an axial relative movement and the separation of the coupling unit can be achieved by the negative feedback unit. If necessary, securing means of the coupling device can be released by means of an actuator before the removal of the coupling unit from the negative-feedback unit is made possible by a relative axial movement.

If the coating device has a plurality of storage units, it is advantageous if a separate rotary feeder is present for each storage unit. As a result, for example, a storage unit, which may be referred to as a main memory unit, supply the coating unit with the at least one wire during operation of the coating apparatus, while at least one further storage unit, which may be referred to as a replacement storage unit, is accessible at a set-up station. During operation, ie during the coating process, the at least one replacement storage unit can be equipped with a new wire supply. If necessary, the rotary feeder or at least one component of the rotary feeder of the replacement storage unit can be replaced if wear has occurred and in particular the tightness of the process gas supply arrangement is no longer guaranteed.

It is advantageous if the capacity of the at least one storage unit for receiving wire is so great that a maximum working time is reached at the maximum possible wire feed speed from the storage unit to the coating tool, during which the coating apparatus can continuously coat a workpiece surface. The minimum working time is so great that the replacement of the for the Tightness of the rotary feeder responsible components and / or a replacement of the complete rotary feeder within the minimum working time is possible. This ensures that in a coating device having a plurality of storage units, a non-operating work of the coating device can be achieved, even if the replacement of the rotary feeder or components of the rotary feeder is required to restore the tightness of the process gas supply.

In a coating apparatus having a plurality of storage units, in one embodiment there is a changer adapted to exchange the work storage unit currently serving to store the coating unit and the currently unused replacement storage unit when the supply of wire in the work storage unit is finished or used up is. This can be sensed, for example, and an automated change triggered. The changing device may in particular be set up to release the main memory unit from the machining unit or to couple the replacement memory unit to the machining unit. As explained, to release the main memory unit from the processing unit, it may be necessary to release a securing means of the coupling device via an actuator of the changing device before the coupling unit can be separated from the negative feedback unit.

If a plurality of mutually exchangeable storage units are present, it is advantageous if the process gas supply arrangement has a gas connection device with a stationary gas connection and with at least one gas coupling unit. In this case, a separate gas coupling unit is available in particular for each storage unit. The gas coupling unit may be arranged, for example, on the changing device or the storage unit. The coupling between the gas coupling unit and the gas connection takes place simultaneously when establishing the coupling of the storage unit with the processing unit, ie preferably by an axial movement along the working axis. Thus, at the same time when connecting a memory unit serving as a working memory unit with the processing unit, a fluidic connection between the gas coupling unit in question and the stationary gas connection can be produced.

In an advantageous embodiment, each memory unit has a first wire feed device. In the case of changing the storage unit, the wire is manually inserted into a wire channel until it is detected by the first wire feeder. The coating unit preferably has a further, second wire feed device in the vicinity of the coating tool or in the vicinity of a heating device of the coating tool. When replacing the storage unit or when inserting a new wire supply in the storage unit, a manual insertion of the wire end to the wire feed device of the coating tool is not necessary by the first wire feed device.

It is advantageous if the rotary feed of the process gas supply arrangement in a wire feed direction along the working axis is arranged axially in front of the first wire feed device of the storage unit.

The process gas supply arrangement has a gas channel which leads from the rotary feed to the coating tool. It is advantageous if there is a monitoring connection which is fluidically connected to the gas channel. The monitoring port may be fluidly connected to a monitoring device or connectable. Advantageously, the monitoring device or the monitoring connection is arranged in a gas channel section, which runs in the region of the storage unit or by the storage unit and / or in the region of the exchange device or by the exchange device. There may also be several monitoring connections or monitoring devices. The monitoring device can be designed as a pressure sensor for measuring a fluid pressure or as a volume or mass flow sensor for measuring a volume or mass flow. This makes it possible to check the tightness of the rotary feeder.

The process gas supply arrangement may comprise one or more gas channels. For example, two or more gas channels may be present to supply process gas at different pressures to the coating unit or coating tool.

In a preferred embodiment, the rotary feeder has a spigot extending along the working axis with a gas passage section for each available gas passage. Preferably, the gas channel section extends radially offset from the working axis when two or more gas channels and therefore at least two gas channel sections are present.

The rotary feeder may further comprise a sleeve surrounding the pin coaxially, which is rotatably mounted relative to the pin and having a sleeve connected fluidly to the associated gas channel portion.

In one embodiment, at least one annular channel may be formed by the sleeve or by an intermediate sleeve arranged between the sleeve and the pin, on the one hand, and the pin, on the other hand. The at least one annular channel may preferably be designed as a groove in the sleeve or the intermediate sleeve. The at least one annular channel is fluidly connected to the associated gas channel section.

It is also possible for at least one annular seal to be present in the sleeve or in the intermediate bush in order to seal off the fluidic connection between the at least one annular channel and the gas channel section in the journal relative to the surroundings. Additionally or alternatively, the at least one annular seal can also be arranged in the journal.

It is also advantageous if the sleeve or the intermediate bushing or another component of the rotary feed, in which one or more fluid seals are arranged, is detachably connected to the journal without tools via a tensioning body connection device. As a result, the rapid replacement of the part having the fluid seals, in particular the sleeve or the intermediate sleeve can be achieved.

Advantageous embodiments of the coating device will become apparent from the dependent claims, the description and the drawings. Hereinafter, preferred embodiments of the coating apparatus will be explained in detail with reference to the drawings. Show it:

1 to 3 each a first embodiment of a coating apparatus in a schematic, block diagram-like representation,

4 and 5 each a second embodiment of the coating apparatus in a schematic, block diagram-like representation,

6 a third embodiment of the coating device in a schematic, block diagram-like representation and

7 to 9 in each case an embodiment of a rotary feeder in a longitudinal section along a working axis.

In the 1 to 6 are different embodiments of a coating device 15 illustrated in a highly schematic manner in the manner of block diagrams. The 1 to 3 show a first embodiment of the coating device 15 , The coating device 15 has at least one storage unit 16 and a coating unit 17 on. The storage unit 16 that with the coating unit 17 is connected as a working memory unit 16a designated. In the first embodiment according to the 1 to 3 and the second embodiment according to the 4 and 5 is additionally a second storage unit 16 present as an exchange storage unit 16b referred to as. The exchange storage unit 16b is from a preparation station 18 accessible and can be there by an operator 19 to be served.

Each storage unit 16 serves to stock at least one metal-containing wire 20 , For example, a welding wire. In the embodiments described herein, in each memory unit 16 two wire rolls, each with a wire 20 arranged, of which the wire 20 during operation of the coating device 15 can be handled.

A wire channel 21 is, for example, for every existing wire 20 intended. The wire channel 21 leads from one of the storage device 16 assigned entrance mouth 22 to a coating tool 23 the coating unit 17 , Via at least one wire feed device 27 . 28 becomes the associated wire 20 through the wire channel 21 from the storage unit 16 or the memory unit 16a to the coating tool 23 transported. In the embodiment, each of the two wires 20 in each case at least one wire feed device 27 . 28 assigned. In the first embodiment described here, each memory unit 16 a first wire feed device 27 for every wire 20 on. The coating unit 17 has a second wire feed device 28 for every wire 20 on. The wire feeders 27 . 28 have according to each case 2 in opposite directions driven rollers, between which the associated wire 20 kraftbzw. frictionally clamped and upon rotation of the rollers in a wire feed direction D from the storage unit 16 to the coating tool 23 is encouraged. The wire feed direction D is the component of the direction of movement of the respective wire 20 , which is aligned parallel to the working axis A. The wire channel 21 may also have portions that are not parallel to the working axis A, so that the wire 20 at least partially also pulled or pushed obliquely to the working axis A. With the wire feed direction D, however, the component is always meant parallel to the working axis A.

At the end located in the wire feed direction D of the coating unit 17 is the coating tool 23 arranged. The at least one wire 20 will be there with the help of a Heating device melted, for example by an arc.

The coating device 15 also has a process gas supply arrangement 29 with a gas channel 30 on, by means of a process gas P to the coating tool 23 is directed. The coating tool 23 has an obliquely or radially aligned to the working axis A outlet opening 31 , With the help of the process gas P, the molten wire material from the outlet opening 31 ejected and blown out, so to speak on the workpiece surface to be coated. The coating unit 17 or the coating tool 23 are rotatably driven about the working axis A. Thereby, the ejection direction of the ejected coating material B is changed. This is the coating unit 17 and / or the storage unit 16 or the memory unit 16a a first drive motor 32 assigned. The drive motor 32 may directly or indirectly via a drive means, such as a gear, a shaft, a belt, a chain or the like with the coating unit 17 be coupled. In the embodiment described here, the coating unit 17 via a belt and preferably a toothed belt with the first drive motor 32 coupled.

Alternatively, could also the main memory unit 16a are driven. In the embodiments described here, the respective working memory unit 16a rotatably with the coating unit 17 coupled so that the resulting assembly 16a . 17 is moved in total about the working axis A rotating. The rotational movement can be via the first drive motor 32 at any structurally suitable location of the unit 16a . 17 be initiated.

In addition, the unit 16a . 17 moved along the working axis A via a slide, not shown, or the like. In this way, the coating tool 23 perform not only a rotational movement about the working axis A but alternatively or additionally, a linear movement along the working axis A. Thus, the coating material B may be ejected in circular paths or a helical path onto the workpiece surface of the workpiece.

Alternatively and preferably, the movement takes place along the working axis A through the workpiece. In this case, the coating tool 23 or the coating unit 17 be immovable or stationary in the direction of the working axis A.

The second wire feed device 28 is preferably close to the outlet opening 31 of the coating tool 23 arranged. By this measure is the way in which the respective wire 20 is merely moved by a thrust, short and a deformation and thus the frictional resistance in the wire guide tube of the wire 20 is reduced.

In the first embodiment of the coating apparatus 15 is a coupling device 37 present, with which a detachable coupling between the storage unit 16 and the coating unit 17 made or an existing coupling can be solved. For this purpose, the coupling device 37 one at the at least one storage unit 16 arranged coupling unit 38 and one on the coating unit 17 arranged negative feedback unit 39 on. At a coupling point K can via the coupling device 37 the coating unit 17 from the memory unit 16a disconnected or with the main memory unit 16a get connected. This is a manual or preferably automated change of the storage unit 16 allows.

At the coupling point K is the at least one wire channel 21 interrupted. It is also necessary the fluid connection of the gas channel 30 run separable. For this purpose, the coupling unit 38 a coupling plug 40 and the negative feedback unit 39 a coupling socket 41 on. It is understood that, conversely, the coupling socket 41 also at the coupling unit 38 and the coupling plug 40 at the negative feedback unit 39 can be arranged.

About the coupling plug 40 and the coupling socket 41 is at the coupling point K creates a separable fluid connection. By a movement parallel to the working axis A, this fluidic connection can be separated or produced. When disconnecting the fluidic connection is at the coupling unit 38 automatically sealing the portion of the gas channel extending in the storage unit 30 produced. This makes it possible to supply the process gas P from a stationary gas connection 42 maintain and an exit at the coupling point K with separated gas channel 30 to avoid. The section of the gas channel 30 in the coating unit 17 is with disconnected coupling device 37 depressurized. Preferably, the coupling bush closes 41 during the separation of the fluidic connection automatically, to the penetration of particles in the gas channel 30 to avoid.

To the process gas supply arrangement 29 also includes a rotary feeder 46 , The rotary feeder 46 is in the 1 to 6 only very schematically illustrated. The rotary feeder 46 is arranged coaxially to the working axis A. It provides a fluidic connection between the stationary gas connection 42 and the elements of the coating device rotatably mounted or driven about the working axis A. 15 For example, according to the main memory unit 16a and the coating unit 17 ,

The rotary feeder 46 has a first rotary feed part 47 and a second rotation supply part 48 which are arranged coaxially with each other. The first rotary feed part 47 is fluidic with a supply channel 49 connected to the stationary gas connection 42 leads. The second rotary feed part 48 is fluidic with the gas channel 30 connected to the line of the process gas P from the rotary feeder 46 to the coating tool 23 is set up. The two rotary feed parts 47 . 48 are adapted to a fluidic connection between the supply channel 49 and the gas channel 30 produce and allow a relative rotation.

The larger the diameter of the two rotary feed parts 47 . 48 at the contact point, the greater the relative rotational speed at a given speed of the coating unit 17 or the storage unit 16 around the working axis A. Therefore, according to the invention, the smallest possible diameter on the cylindrical contact surface between the two rotary feed parts 47 . 48 be achieved. For this reason, the rotary feeder is 46 in the first embodiment of the coating apparatus 15 viewed in wire feed direction D arranged in front of the coupling point K. According to the example, the rotary feeder is located 46 on the coating unit 17 remote side of the at least one storage unit 16 ,

Through this positioning of the rotary feeder 46 it is not necessary, in addition to the process gas P other fluids or electrical lines or beispielsgemäß the wires 20 along the working axis A through the rotary feeder 46 to lead or lead. As a result, the diameter of the rotary feed and in particular the cylindrical contact surface between the two rotary feed parts 47 . 48 be minimized. In addition, in the proposed installation position of the rotary feeder 46 their accessibility improved. In particular, for each existing storage unit 16 a separate rotary feeder 46 available. As a result, in case of wear of the rotary feeder 46 or their sealing components at the set-up station 18 a repair or an exchange be made without the operation of the coating apparatus 15 to have to interrupt.

The rotary feeder 46 is, for example, in the wire feed direction D viewed axially in front of the entrance mouth 22 of the wire channel 21 arranged. Alternatively, it would also be possible to use the rotary feeder 46 in wire feed direction D before the coupling point K but behind the entrance mouth 22 of the wire channel 21 to arrange.

In the first embodiment of the coating apparatus 15 is a change device 52 present, by means of an automated change of the storage unit 16 can be done. The changing device 52 is set up to switch between the memory unit 16a and the exchange storage unit 16b to induce. This can be triggered automatically, for example, if it is detected that the wire supply in the currently used memory unit 16a is used up. According to the example, the changing device 52 two diametrically projecting from a pivot axis S boom 53 on. At each boom 53 is a storage unit 16 arranged. Via a second drive motor 54 can pivot the boom 53 be executed by 180 ° about the pivot axis S. The two storage units exchange 16 their seats, leaving the previous memory unit 16a at the set-up station 18 arranged and the ready-for-exchange storage unit 16b coaxial with the working axis A is positioned. About the changing device 52 also allows axial movement of the storage units 16 along the working axis A to a memory unit 16a at the coupling point K of the coating unit 17 to separate ( 2 ) or after the pivoting movement about the pivot axis S, the ready-to-use storage unit 16 (new memory unit 16a ) by an axial movement with the coating unit 17 connect to ( 3 ).

In the connection area between the boom 53 and the storage unit 16 is the rotary feeder 46 available. The feed channel 49 can in this embodiment along the boom concerned 53 from the respective rotary feeder 46 to the gas connection 42 run. The gas connection 42 can be present in the region of the pivot axis S.

The supply of process gas P from the gas connection 42 to the rotary feeder 46 the replacement storage unit 16b at the set-up station 18 is preferably lockable. Either the barrier can be replaced by the changing device 52 take place automatically, so that the process gas P always only through the supply channel 49 that flows to the main memory unit 16a leads. Alternatively, the shut-off can also be done manually via a shut-off valve. This makes it possible at the setup station 18 the rotary feeder 46 expand without process gas P flows out.

The at least one storage unit 16 and, by way of example, each memory unit 16 has at least one monitoring port 57 on. The monitoring connection 57 is for example on the storage unit 16 arranged and fluidly with the Section of the gas channel 30 connected between the coupling device 37 and the rotary feeder 46 runs. The at least one monitoring port 57 can also be on the supply line 49 or at the gas connection 42 be arranged. It is also possible to have several monitoring connections 57 to provide at different positions.

In 1 By way of example only, a plurality of possible positions for arranging one or more monitoring ports 57 entered. At every monitoring connection 57 a monitoring device can be connected or permanently connected. With the aid of the monitoring device, the pressure and / or the volume or mass flow of the process gas P can be measured. This allows the tightness in the connection between the gas connection 42 and the coupling device 37 being checked.

It is particularly advantageous if such a leak test at the set-up 18 is performed. For example, process gas P flows through the supply line 49 to the exchange storage unit 16b although the gas channel 30 at the coupling unit 38 is shut off, so can leak to the rotary feeder 46 closed and the leak can be corrected. Additionally or alternatively, the fluid connection to the gas connection 42 interrupted and the pressure curve in the section of the gas channel 30 to be watched. If the pressure decreases, process gas P exits at one point. Also in this way, the tightness of the rotary feeder 46 at the set-up station 18 being checked.

The second embodiment of the coating device 15 according to the 4 and 5 corresponds essentially to the embodiment according to the 1 to 3 so that reference may be made to the above description. In a modification to the first embodiment described so far is a gas connection device 58 present, to which the stationary gas connection 42 and at least one gas coupling unit 59 belongs. According to example, for each existing storage unit 16 a separate gas coupling unit 59 available. The gas coupling unit 59 is indirect or immediate with the respective associated memory unit 16 connected. In the embodiment, the gas coupling unit 59 on which the relevant storage unit 16 carrying boom 53 the changing device 52 arranged. Analogous to the coupling device 37 indicates the gas coupling unit 59 a coupling plug 40 and the gas connection 42 a coupling socket 41 on, the arrangement could be reversed. By the axial movement of the at least one storage unit 16 relative to the coating unit 17 becomes in this second embodiment of the coating device 15 at the same time the fluid connection between the gas connection 42 and the gas coupling unit 59 the main memory unit 16 a produced or separated. In this embodiment, the at the set-up 18 arranged replacement storage unit 16b or the existing there section of the gas channel 30 always without pressure. The decoupled state of the coupling device 37 and the gas connection device 58 is schematic in 5 illustrated. At the gas connection 42 In this embodiment, a shut-off means is provided which avoids the gas outlet of the process gas P in the decoupled state.

In 6 is a third embodiment of the coating apparatus 15 illustrated. In contrast to the previous embodiments, the coating device 15 no coupling device 37 on. The storage unit 16 is therefore not without installation effort of the coating unit 17 separable or me this connectable. In this embodiment, an automatic change of the storage unit 16 not provided.

Otherwise correspond to the structure and operation of the coating device 15 the embodiments described above. It is also important here that the rotary feeder 46 on the storage unit 16 and not on the coating unit 17 is arranged. In particular, the rotary feeder is located 46 in the wire feed direction D along the working axis A viewed in front of at least one entrance mouth 22 the at least one wire channel 21 ,

In this third embodiment of the coating device 15 to 6 indicates the storage unit 16 no wire feed device on. It is only the second wire feed device 28 at the coating unit 17 or the coating tool 23 available.

In the 7 to 9 is in each case an embodiment of a rotary feeder 46 illustrated. The first rotary feed part 47 That with the feed channel 49 is coupled, for example, by a pin 65 educated. At one axial end, the pin has 65 a first fluid port 66 fluidly connected to the supply channel 49 or the gas connection 42 connected is. In the embodiment, the first fluid port 66 formed by a radially extending to a longitudinal axis L of the pin stitch channel.

Parallel to the longitudinal axis L extends in the pin a gas channel section 67 of the gas channel 30 , The gas channel section 67 is by way of example by an axial bore in the pin 65 educated. At the first fluid port 66 opposite end of the gas channel 67 is a gas channel output 68 present, which in the embodiment also extends radially to the longitudinal axis L. About the gas channel section 67 are the first fluid connection 66 and the gas channel output 68 fluidly coupled together.

In the 7 illustrated rotary feeder 46 is used to connect several and example of three separate gas channels. In the longitudinal section is only a gas channel section 67 to recognize. The gas channel sections 67 for the three separate channels extend in the circumferential direction about the longitudinal axis L and offset it. The number of channels can vary. The rotary feeder 46 has at least a first fluid port 66 , a gas channel output 68 and a gas passage section extending therebetween 67 on.

At the axial end region where the gas channel exit 68 is present, enclosing a sleeve 69 the end portion of the pin 65 , Between the sleeve 69 and the pin 65 is at least one annular channel 70 educated. In the embodiment, radially inwardly open circular grooves in the sleeve 69 introduced, each having a ring channel 70 form. The grooves could alternatively or additionally also in the end portion of the pin 65 to be available.

The number of ring channels 70 corresponds to the number of gas channel sections 67 in the cone 65 , Each ring channel 70 communicates fluidically with an associated gas channel output 68 a respective gas channel section 67 , With several ring channels 70 these are arranged axially to the longitudinal axis L at a distance from each other. The gas channel output 68 each gas channel section 67 is accordingly present at the relevant axial position and opens into the associated annular channel 70 one.

The sleeve 69 has at least one second fluid port 71 on, the fluidic, each with an associated annular channel 70 and thus via the assigned gas channel output 68 with the associated gas channel section 67 connected is. The second fluid connection 71 for each ring channel 70 passes through the sleeve 69 at the corresponding axial position radially to the longitudinal axis L. Are several second fluid connections 71 present, they can as in the embodiment according to 7 in different radial directions with respect to the longitudinal axis L of the sleeve 69 open out.

For sealing the fluidic connection between the pin 65 and the sleeve 69 is at least one inner ring seal in between 72 arranged. For example, on both axial sides of each annular channel 70 one inner ring seal each 72 be arranged so that the fluid connection between the respective annular channel 70 and the gas channel output 68 is sealed relative to the environment or the other annular channels and second fluid connections.

There are also outer ring seals 74 present, each axially above and below each existing second fluid port 71 between the intermediate socket 77 and the sleeve 69 are arranged.

The second fluid connection 71 serves for fluidic connection with that in the storage unit 16 extending, adjoining section of the gas channel 30 , The sleeve 69 Thus, in the embodiment, the second rotation supply part 48 Around the longitudinal axis L are the two rotary feed parts 47 . 48 or the pin 65 and the sleeve 69 rotatable relative to each other. The sleeve 69 rotates in the embodiment together with the storage unit 16 and the coating unit 17 about the working axis A. For this purpose, the longitudinal axis L of the rotary feeder 46 aligned along the working axis A. The first rotary feed part 47 and according to the pin 65 is rotatably mounted, eg on the boom 53 or on another machine part of the coating device which does not rotate about the working axis A. 15 , For storage of the two rotary feed parts 47 . 48 relative to each other is a bearing assembly 73 available. The bearing arrangement 73 may have sliding and / or roller bearings and be adapted to support radial forces and / or axial forces relative to the longitudinal axis L.

In 8th is another embodiment of the rotary feeder 46 shown. Unlike the execution after 7 is in the embodiment after 8th between the sleeve 69 and the end portion of the pin 65 an intermediate socket 77 arranged. The intermediate socket 77 is rotatable with the sleeve 69 connected and thus belongs to the second rotation supply part 48 , Every second fluid connection 71 is via a connection opening 78 in the intermediate socket 77 with a respective associated annular channel 70 fluidly connected. In contrast to the embodiment according to 7 are the ring channels 70 in the intermediate socket 77 formed by annular recesses and the peripheral surface of the pin 65 open. The inner ring seals 72 are in annular webs of the intermediate sleeve 77 arranged that any existing ring channel 70 limit on both axial sides. Incidentally, the embodiment corresponds to the rotary feeder 46 to 8th according to the embodiment 7 ,

The advantage of interposing the intermediate socket 77 between the sleeve 69 and the pin 65 is that the fluid pipes or fluid lines, which are connected to the first fluid port 66 or the second fluid port 71 are connected when replacing the ring seals 72 . 74 Not must be removed. Rather, it is enough, the intermediate jack 77 from the sleeve 69 to solve and the ring seals 72 . 74 or the entire intermediate socket 77 replace if the fluid tightness of the rotary feeder 46 must be restored.

A modified embodiment of the rotary feeder 46 out 8th is in 9 illustrated. While the intermediate jack 77 according to the embodiment 8th via a screw connection with the sleeve 69 was releasably connected, is in the embodiment according to 9 a quick release device 79 available. The quick release device 79 Used for quick and, for example, tool-free connection between the two rotary feed parts 47 . 48 and according to example between the intermediate socket 77 and the pin 65 , The sleeve 69 is with the flange of the bearing assembly 73 firmly screwed.

The quick release device 79 has in the embodiment a clamping body connection device 80 with at least one clamping body 81 on. In the embodiment serves as a clamping body 81 a ball. Preferably, a plurality of balls or clamping bodies distributed around the longitudinal axis L are arranged 81 available. Every clamping body 81 is in a radial recess 82 at an axial end of the pin 65 arranged and mounted movable radially to the longitudinal axis L. Every clamping body 81 can move between a clamping position and a release position obliquely or radially to the longitudinal axis L. In the clamping position, the clamping body protrudes 81 over the peripheral surface of the pin 65 out. In the release position, the at least one clamping body 81 such in the radial recess 82 shifted to the longitudinal axis L out that he does not have the peripheral surface of the pin 65 protrudes.

To the clamping body connection device 80 also includes a clamping part 83 , The clamping part 83 is biased to a starting position, for example by a spring device 84 , In the initial position, the clamping part acts 83 the at least one clamping body 81 and forces it radially away from the longitudinal axis L in its clamping position. An operator can the clamping part 83 against the force of the spring device 84 move until the at least one clamping body 81 a release cut 85 is assigned such that the clamping body 81 can move from the clamping position to the release position and thereby in the Freigabeaussparung 85 penetrates. The release opening 85 is in the embodiment by a radially outwardly open circumferential groove in the clamping part 83 educated. Once the release cut 85 axially at the height of the at least one clamping body 81 is (release position of the clamping part), this can be moved radially inwards to the longitudinal axis L out and take its release position.

The clamping part 83 is frontally and coaxially to the longitudinal axis L on the pin 65 arranged and protrudes into a frontal depression 86 into it. The at least one radial recess 82 is to the frontal depression 86 open so that the arranged therein at least one clamping body 81 from the frontal depression 86 can be applied. In the frontal depression 86 the spring device is supported 84 on an axial surface of the pin 65 and on an axial surface of the clamping part 83 off and urges the clamping part 83 from the frontal depression 86 out to its original position. Through a central stop pin 87 , which is a bore of the clamping part 83 interspersed, is the clamping part 83 and the spring device 84 captive on the pin 65 held. The clamping part 83 can along the stop pin 87 against the force of the spring device 84 in the frontal depression 86 be moved from its initial position into a release position. Will the clamping part 83 not charged, urges the spring device 84 the clamping part 83 in its initial position, in which the clamping part 83 the at least one clamping body 81 moved radially away from the longitudinal axis L outward into its clamping position.

At the intermediate socket 77 are on an inner surface radially inwardly open clamping recesses present, in which the at least one clamping body 81 engages in its clamping position and an axial movement of the intermediate sleeve 77 positively and / or positively prevented.

Will the clamping part 83 moved from the starting position in the release position, the at least one clamping body 81 be brought into its release position when the intermediate socket 77 in the direction of the longitudinal axis L axially from the end portion of the pin 65 is pulled. The intermediate socket 77 is secured against rotation by a pin.

The invention relates to a coating device 15 for coating at least one workpiece surface, in particular a cylindrical bore. The coating device 15 has at least one storage unit 16 for storing at least one wire 20 on. At least one of the existing storage devices 16 is rotatably mounted about a working axis A. With the memory unit rotatably mounted about the working axis A. 16 is a coating unit 17 connected or via a coupling device 37 connectable. The assembly from the coating unit 17 and storage unit 16 is rotatably driven about the working axis A. The coating unit 17 has a coating tool 23 at least that a wire 20 over at least one wire channel 21 and with the aid of at least one wire feed device 27 . 28 is supplied. Furthermore, the coating device 15 a process gas supply arrangement 29 on. To this belongs a rotary feeder 46 , which is fluidic with a gas channel 30 the coating device 15 connected is. The gas channel 30 leads from the rotary feeder 46 to the coating tool 23 , If a coupling device 37 is present, is the rotary feeder 46 at the part of the coating device 15 arranged, the with disconnected coupling device 37 the storage unit 16 having. In a coating device 15 without coupling device 37 is the rotary feeder 46 considered in a wire feed direction D axially in front of an entrance mouth 22 the at least one wire channel 21 , Preferably, this position of the rotary feeder 46 also in a coating device 15 with coupling device 37 be provided.

LIST OF REFERENCE NUMBERS

15

 coater

16

 storage unit

16a

 Memory unit

16b

 Exchange storage unit

17

 coating unit

18

 setup station

19

 operator

20

 wire

21

 wire channel

22

 entrance mouth

23

 coating tool

27

 first wire feed device

28

 second wire feed device

29

 Process gas supply arrangement

30

 gas channel

31

 outlet opening

32

 first drive motor

37

 coupling device

38

 coupling unit

39

 Feedback unit

40

 coupling connector

41

 coupling sleeve

42

 gas connection

46

 rotary feeder

47

 first rotary feed part

48

 second rotary feed part

49

 supply channel

52

 changer

53

 boom

54

 second drive motor

57

 monitor terminal

58

 Gas connection device

59

 Gas coupling unit

65

 spigot

66

 first fluid connection

67

 Gas channel section

68

 Gas channel output

69

 shell

70

 annular channel

71

 second fluid connection

72

 inner ring seal

73

 bearing arrangement

74

 outer ring seal

77

 between the bush

78

 connecting opening

79

 Quick clamping device

80

 Clamping body connecting device

81

 tensioning body

82

 radial recess

83

 tensioning part

84

 spring means

85

 release recess

86

 frontal depression

87

 stop pin

A

 working axis

B

 coating material

D

 Wire feed direction

K

 coupling site

L

 longitudinal axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102010060652 A1 [0002]

Claims (17)

Coating device ( 15 ) for coating a workpiece surface of a workpiece, with a coating unit rotatably drivable about a working axis (A) ( 17 ), which is a coating tool ( 23 ), with at least one memory unit ( 16 ) mounted rotatably about the working axis (A) and adapted to carry at least one wire ( 20 ) for the coating tool ( 17 ), with a coupling device ( 37 ), which is adapted to provide a detachable coupling at a coupling point (K) between the memory unit ( 16 ) and the coating unit ( 17 ), with a rotary feeder ( 46 ) having process gas supply arrangement ( 29 ), which is adapted to a process gas (P) from the rotary feeder ( 46 ) via at least one gas channel ( 30 ) to the coating tool ( 23 ), wherein the rotary feeder ( 46 ) is arranged on the side of the coupling point (K) on which the memory unit ( 16 ) is located. Coating device according to claim 1, characterized in that the coupling device ( 37 ) one at the at least one storage unit ( 16 ) arranged coupling unit ( 38 ) and one on the coating unit ( 17 ) arranged negative feedback unit ( 39 ), wherein the coupling device ( 37 ) is adapted, by an axial movement between the coupling unit ( 38 ) and the negative feedback unit ( 39 ) to make a detachable connection. Coating device according to claim 1 or 2, characterized in that for each available storage unit ( 16 ) a separate rotary feeder ( 46 ) is available. Coating device according to one of the preceding claims, characterized in that at least two storage units ( 16 ), one of which is a main memory unit ( 16a ) and the other an exchange storage unit ( 16b ). Coating device according to claim 4, characterized in that a changing device ( 52 ), which is set up to store the main memory unit ( 16a ) of the coating unit ( 17 ) and the replacement storage unit ( 16b ) with the coating unit ( 17 ) to couple. Coating device according to claim 4 or 5, characterized in that the process gas supply arrangement ( 29 ) a gas connection device ( 58 ) with a stationary gas connection ( 42 ) and with at least one gas coupling unit ( 59 ), wherein for each of the memory units ( 16 ) a gas coupling unit ( 59 ) available. Coating device according to one of the preceding claims, characterized in that the storage unit ( 16 ) a first wire feed device ( 27 ), which is adapted to the coating unit ( 17 ) the at least one wire ( 20 ). Coating device according to claim 7, characterized in that the rotary feeder ( 46 ) along the working axis (A) in a wire feed direction (D) viewed axially before the first wire feed device ( 27 ) is arranged. Coating device ( 15 ) for coating a workpiece surface of a workpiece, with a coating unit rotatably drivable about a working axis (A) ( 17 ), which is a coating tool ( 23 ), with a memory unit ( 16 ) mounted rotatably about the working axis (A) and adapted to carry at least one wire ( 20 ) for the coating tool ( 23 ) with at least one wire channel ( 21 ) stored by the storage unit ( 16 ) to the coating unit ( 23 ) and an entrance mouth ( 22 ) on the storage unit ( 16 ), with a a rotary feeder ( 46 ) having process gas supply arrangement ( 29 ), which is adapted to a process gas (P) from the rotary feeder ( 46 ) via at least one gas channel ( 30 ) to the coating tool ( 23 ), wherein the rotary feeder ( 46 ) axially along the working axis (A) in a wire feed direction (D) viewed in front of the entrance mouth ( 22 ) of the wire channel ( 21 ) is arranged. Coating device according to one of the preceding claims, characterized in that the rotary feeder ( 46 ) on the storage unit ( 16 ) is arranged. Coating device according to one of the preceding claims, characterized in that the rotary feeder ( 46 ) on the coating unit ( 17 ) opposite side of the memory unit ( 16 ) is arranged. Coating device according to one of the preceding claims, characterized in that at least one with the gas channel ( 30 ) fluidly connected monitoring port ( 57 ), which is connected to a monitoring device or connectable. Coating device according to claim 12, characterized in that the Monitoring device for measuring the pressure or for measuring a volume or mass flow is set up. Coating device according to one of the preceding claims, characterized in that the rotary feeder ( 46 ) a along the working axis (A) extending pin ( 65 ) with at least one gas channel section ( 67 ) of the gas channel ( 30 ) having. Coating device according to claim 14, characterized in that the rotary feeder ( 46 ) a coaxial around the pin ( 65 ) arranged sleeve ( 69 ), which relative to the pin ( 65 ) is rotatably mounted and a fluidically with the respective associated gas channel section ( 67 ) connected sleeve connection ( 71 ) having. Coating device according to claim 15, characterized in that between the sleeve ( 69 ) or one between the pin ( 65 ) and sleeve arranged intermediate bushing ( 77 ) on the one hand and the pin ( 65 ) On the other hand, at least one annular channel ( 70 ) and at least one ring seal ( 72 ) is available. Coating device according to claim 15 or 16, characterized in that the sleeve ( 69 ) or the intermediate socket ( 77 ) via a clamping body connection device ( 80 ) detachable without tools with the pin ( 65 ) connected is.

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