Fluid supply device for a rotating tool

Abstract

Fluid supply device (16) for a rotating tool (12), comprising a cooling channel (22) for supplying a fluid to the rotating tool (12), wherein the cooling channel (22) encloses an outer circumferential section of the rotating tool (12), wherein the cooling channel (22) has an outlet channel (30) and at least two fluid guide channels opening into the outlet channel (30), wherein the outlet channel (30) extends along a circumference U of the rotating tool (12), wherein the outlet channel (30) has two cheeks (31) enclosing an outer circumferential section of the rotating tool (12), and wherein one fluid guide channel (28) is directed laterally towards the rotating tool (12) and the other fluid guide channel (28) is directed towards the end face of the rotating tool (12).

Description

[0001] The present invention relates to a fluid supply device for a rotating tool. Furthermore, the invention relates to a machine tool with such a fluid supply device and to a vehicle component manufactured with such a fluid supply device.

[0002] In vehicle manufacturing, milling processes are used to separate components or create channels within them. Rotating tools, such as disc cutters, are used for this purpose. However, the full service life of disc cutters cannot be utilized in the milling process because contamination leads to premature overheating and thus increased wear.

[0003] German patent application DE 10 2004 011 309 A1 provides an example of a coolant supply system for a rotating tool. The coolant supply system comprises one or more coolant guide plates mounted laterally on a grinding wheel or tool body. These guide plates have one or more cavities, with or without a turbo compressor system, which allow coolant to be supplied to the grinding wheel or cutting edges via cooling channels. The cavities can be supplied with coolant via an annular supply opening, so that the coolant pressure generated in the cavities and the centrifugal force force the coolant through the cooling channels to the point of engagement of the grinding wheel or the cutting edge.

[0004] The present invention is based on the objective of creating a fluid supply device that has an improved cooling and cleaning function and is also cost-effective.

[0005] To solve the problem, a fluid supply device with the features of claim 1, a machine tool with the features of claim 10 and a vehicle part with the features of claim 11 are proposed.

[0006] Advantageous embodiments of the fluid supply device are the subject of the dependent claims.

[0007] According to one aspect, a fluid supply device for a rotating tool, in particular a disc cutter, is proposed, which has a cooling channel for supplying a fluid to the rotating tool, wherein the cooling channel encloses an outer circumferential section of the rotating tool.

[0008] Since the cooling channel encloses an outer circumferential section of the rotating tool, improved fluid supply to the rotating tool is achieved, resulting in enhanced cooling and cleaning for rotating tools, particularly disc cutters. This leads to a significant increase in the tool life. Furthermore, a disc-enclosing cooling channel represents a cost-effective solution for cooling and cleaning a rotating tool.

[0009] In this context, a rotating tool is understood to be a tool that rotates around an axis of rotation. The rotating tool can be a disc cutter or a drill. The rotating tool can be mounted in a machine tool so that it can rotate freely.

[0010] In this context, a fluid is understood to be a medium that can be used for cooling and / or cleaning a rotating tool. The fluid can be air, particularly compressed air, or a liquid. The fluid for cooling and / or cleaning can be supplied to the fluid supply device via an external source, for example, from a fluid reservoir such as a coolant tank. For this purpose, the fluid supply device can have at least one fluid inlet. In this context, the fluid can also be referred to as a coolant. Therefore, the fluid supply device can also be referred to as a coolant supply device.

[0011] In this context, an outer circumferential section is understood to mean that the cooling channel only encloses a partial section of the circumference of the rotating tool. Advantageously, the cooling channel can have lateral cheeks that encompass an edge section of the rotating tool and extend along a circumference, in particular a partial section of the circumference, of the rotating tool.

[0012] In an advantageous embodiment, the fluid supply device is designed as a monolithic hollow body. In this context, "monolithic" means a one-piece body made of a single material, without joints or seams.

[0013] In an advantageous embodiment, the fluid supply device is manufactured layer by layer using an additive manufacturing process. This significantly reduces the manufacturing costs of the fluid supply device. Furthermore, manufacturing the fluid supply device using additive manufacturing allows the design parameters to be easily adapted to different conditions and applications, making them generically adjustable. The data set for the additive manufacturing process simply needs to be adjusted to the new conditions and application, particularly the required dimensions.

[0014] The degrees of freedom of a machine tool, particularly a disc milling unit, such as disc diameter, clamping length, and / or angular position, are advantageously considered and adjustable in the parametric design of the fluid supply device. This allows the resulting assembly to be generically adjustable for the additive manufacturing process across a wide range of applications.

[0015] In an advantageous embodiment, the fluid supply device comprises a supply channel for feeding the fluid to the cooling channel and a connecting channel linking the supply channel and the cooling channel. Due to the single cooling channel, the fluid supply device has a compact installation space. To adapt the fluid supply device to different installation situations, it is only necessary to lengthen or shorten the supply channel. This allows the fluid supply device to be easily adapted to the prevailing conditions. Advantageously, the supply channel is shaped like a circular arc. Furthermore, it is advantageous that the supply channel extends in a plane parallel to the axis of rotation of the rotating tool. The connecting channel also advantageously extends perpendicular to an axis of rotation of the rotating tool.

[0016] The connecting channel can thus have a curved section that is connected to the feed channel and that transfers the fluid supply device from a plane parallel to an axis of rotation of the rotating tool to a plane perpendicular to the axis of rotation, and a perpendicular section.

[0017] In an advantageous embodiment, the cooling channel is oriented at an angle to a vertical axis of the connecting channel. This allows the fluid supply device to be adapted to the angular position of a machine tool, in particular a disc milling unit. The angular position of the cooling channel can be generated during the additive manufacturing process.

[0018] In an advantageous embodiment, the cooling channel has at least two fluid guide channels and an outlet channel that surrounds the rotating tool on its outer circumference, with the fluid guide channels opening into the outlet channel. By providing two separate fluid guide channels integrated into the cooling channel, the fluid can be directed to a defined position of the rotating tool for cooling and / or cleaning. Advantageously, the outlet channel has lateral cheeks that encompass an edge section of the rotating tool and extend along a circumference, in particular a partial circumference, of the rotating tool. In an advantageous embodiment, the outlet channel is angled relative to a vertical axis of the connecting channel. Advantageously, the cooling channel has three fluid guide channels, each of which is directed toward a different area of ​​the rotating tool.Furthermore, it is advantageous that the fluid guide channels and the outlet channel are manufactured in one piece during an additive manufacturing process. The fluid guide channels can also be referred to as inflow channels. The outlet channel can also be referred to as the outlet nozzle.

[0019] In an advantageous embodiment, one fluid guide channel is directed laterally towards the rotating tool, and the other fluid guide channel is directed towards the end face of the rotating tool. This enables effective cooling and / or cleaning of the rotating tool. "Laterally" in this context refers to the front or back face of the rotating tool. "End face" in this context refers to the side of the rotating tool that corresponds to a depth direction of the rotating tool and extends parallel to an axis of rotation of the rotating tool. If the cooling channel has three fluid guide channels, the two fluid guide channels are positioned opposite each other, such that one fluid guide channel is directed towards the front face of the rotating tool and the other fluid guide channel is directed towards the back face of the rotating tool.

[0020] In an advantageous embodiment, the feed channel has at least one connection for introducing the fluid into the fluid supply device and / or for mounting the fluid supply device. The connection thus has a dual function. On the one hand, the fluid is introduced into the fluid supply device, in particular the feed channel, via the connection; and on the other hand, the fluid supply device is mounted to a machine tool, for example, a disc milling unit, via the connection. Advantageously, the additional mounting of the fluid supply device does not result in any increased installation space required during the milling process. Furthermore, a precise connection to the machine tool is established, thus preventing incorrect mounting of the fluid supply device. The connection can also form the end of the feed channel.The connecting element can be designed as a hollow cylinder projecting from the feed channel and connected to the feed channel via an opening in the hollow cylinder and a channel. In an advantageous embodiment, the feed channel has at least two connecting elements for introducing the fluid into the fluid supply device and for assembly. Advantageously, the fluid supply device can be connected to a fluid system, such as a cooling system, of a machine tool via a hollow screw.

[0021] In an advantageous embodiment, the fluid supply device is made of plastic or metal. For example, the fluid supply device can be made of polyamide 12 (PA 12) with or without fiber content. Furthermore, the fluid supply device can be made of aluminum.

[0022] In an advantageous embodiment, the additive manufacturing process is a stereolithography process (SL), a laser sintering process (LS), a laser beam melting process (LBM), in particular a selective laser melting process (SLM), an electron beam melting process (EBN), a fused layer modeling / manufacturing process (FLM / FFF), a fused deposition modeling process (FDM), a multi-jet modeling process (MJM), a poly-jet modeling process (PJM), a binder jetting process, a layer laminated manufacturing process (LLM), a digital light processing process (DLP), a thermal transfer sintering process (TTS) and / or a digital light synthesis process (DLS).

[0023] According to another aspect, a machine tool is proposed which has a fluid supply device according to the invention.

[0024] According to another aspect, a vehicle part is proposed which is manufactured with a fluid supply device according to the invention.

[0025] The following section explains a fluid supply device and its other features and advantages in more detail using an exemplary embodiment, which is schematically illustrated in the figures. These figures show: Fig. 1 a disc milling unit with a rotating tool designed as a milling disc and a fluid supply device; Fig. 2 a perspective view of the fluid supply device; Fig. 3 a front view of the fluid supply device; and Fig. 4. a cut along line IV-IV in Fig. 3

[0026] In Fig. Figure 1 shows a disc milling unit 10 with a rotating tool 12, which in this case is a milling disc 14, and a fluid supply device 16 for cooling and / or cleaning the rotating tool 12.

[0027] The milling head 12 can be attached to a milling machine (not shown) and has a base 18 and an angle adjustment device 20 that can be rotated relative to the base 18.

[0028] The fluid supply device 16 supplies a fluid, such as a coolant or compressed air, from a fluid reservoir (not shown) of the milling machine to the rotating tool 12 in order to cool and / or clean it.

[0029] The fluid supply device 16 is a monolithic hollow body made of plastic, in particular PA 12, or of metal, in particular aluminium, wherein the hollow body is produced by layer-by-layer construction using an additive manufacturing process.

[0030] The additive manufacturing process for producing the fluid supply device 16 can be, for example, a stereolithography process (SL), a laser sintering process (LS), a laser beam melting process (LBM), in particular a selective laser melting process (SLM), an electron beam melting process (EBN), a fused layer modeling / manufacturing process (FLM / FFF), a fused deposition modeling process (FDM), a multijet modeling process (MJM), a polyjet modeling process (PJM), a binder jetting process, a layer laminated manufacturing process (LLM), a digital light processing process (DLP), a thermal transfer sintering process (TTS) and / or a digital light synthesis process (DLS).

[0031] As in the Fig. 2 to Fig. As can be seen in Figure 4, the fluid supply device 16 has a cooling channel 22 which encloses an outer circumferential section of the rotating tool 12, a supply channel 24 which supplies the fluid to the cooling channel 22, and a connecting channel 26 which connects the cooling channel 22 and the supply channel 24.

[0032] The cooling channel 22 has three fluid guide channels 28 and an outlet channel 30 that surrounds the rotating tool 12 on its outer circumference.

[0033] As particularly in Fig. As can be seen in Figure 4, the fluid guide channels 28 are fluid-conductingly connected to the connecting channel 26, with two fluid guide channels 28 projecting laterally such that they are opposite each other and one fluid guide channel 28 is directed towards the front of the rotating tool 12 and the other fluid guide channel 28 is directed towards the rear of the rotating tool. The third fluid guide channel 28 is directed towards an end face of the rotating tool 12. This ensures optimal cooling and cleaning of the rotating tool.

[0034] The exit channel 30 extends along a circumference U of the rotating tool 12 and has two cheeks 31 that enclose an outer circumferential section of the rotating tool 12.

[0035] The feed channel 24 is designed as a semicircular channel extending in a plane perpendicular to an axis of rotation R of the rotating tool 12. The feed channel has two connection means 32 for connecting the feed channel 24 to the fluid reservoir (not shown) and for mounting the fluid supply device 16 on the disc milling unit 10. As can be seen in the figures, one of the connection means 32 forms a termination of the feed channel 24.

[0036] The connecting elements 32 are hollow cylinders 34 which are fluidly connected to the feed channel 24 via an opening 36 and a channel 38 provided in the hollow cylinder 34. The connecting elements 32 are fluidly connected to the disc milling unit 10 via hollow screws 40.

[0037] The connecting channel 26 connects the supply channel 24 with the cooling channel 22, in particular the fluid guide channels 28, as shown especially in the Fig. 2 to Fig. As can be seen in Figure 4. The connecting channel 26 has a curved section 42, which is connected to the supply channel 24, and a vertical section 44, which opens into the fluid guide channels 28. The curved section 42 transfers the fluid supply device 16 to a plane that is perpendicular to the axis of rotation R.

[0038] The fluid supply device 16 is characterized, on the one hand, by its disc-enclosing cooling channel 22 with fluid guide channels 28 located laterally and at the front, and on the other hand, by its design as a one-piece hollow body produced in an additive manufacturing process. The degrees of freedom of the disc milling unit, such as disc diameter, clamping length, and angular position, are taken into account and adjustable in the parametric design of the fluid supply device 16. The resulting design for the additive manufacturing process of various applications can thus be produced generically. This reduces manufacturing costs by 50% compared to conventional systems. Furthermore, incorrect settings and assembly are eliminated. The additional installation of the fluid supply device 16 does not increase the installation space required during the milling process, and the installation parameters of the fluid supply device 16 are automatically marked on the component. Reference symbol list 10 disc milling unit 12 rotating tools 14 milling disc 16 Fluid supply device 18 base 20 Adjustment device 22 Cooling channel 24 feed channel 26 Connection channel 28 Fluid guide channel 30 Exit channel 31 Cheek 32 connection devices 34 hollow cylinders 36 Opening 38-channel 40 Hollow screw 44 Curvature section 46 vertical section U Circumference of the rotating tool R Rotation axis of the rotating tool QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 102004011309 A1

[0003]

Claims

[1] Fluid supply device (16) for a rotating tool (12), comprising a cooling channel (22) for supplying a fluid to the rotating tool (12), wherein the cooling channel (22) encloses an outer circumferential section of the rotating tool (12). [2] Fluid supply device (16) according to claim 1, characterized by , that the fluid supply device (16) is designed as a monolithic hollow body. [3] Fluid supply device according to claim 1 or 2, characterized by , that the fluid supply device (16) is produced by layer-by-layer construction using an additive manufacturing process. [4] Fluid supply device (16) according to one of the preceding claims, characterized by a supply channel (24) for supplying the fluid to the cooling channel (22) and a connecting channel (26) connecting the supply channel (24) and the cooling channel (22). [5] Fluid supply device (16) according to one of the preceding claims, characterized by, that the cooling channel (22) has at least two fluid guide channels and an outlet channel (30) surrounding the rotating tool (12) on its outer circumference, wherein the fluid guide channels open into the outlet channel (30). [6] Fluid supply device (16) according to claim 5, characterized by , that one fluid guide channel (28) is directed laterally towards the rotating tool (12) and that the other fluid guide channel (28) is directed towards the front of the rotating tool (12). [7] Fluid supply device (16) according to one of claims 2 to 6, characterized by , that the supply channel (24) has at least one connection means (32) for introducing the fluid into the fluid supply device (16) and / or for mounting the fluid supply device (16). [8] Fluid supply device (16) according to one of the preceding claims, characterized by that the fluid supply device (16) is made of plastic or metal. [9] Fluid supply device (16) according to any one of claims 2 to 8, characterized by that the additive manufacturing process is a stereolithography process (SL), a laser sintering process (LS), a laser beam melting process (LBM), in particular a selective laser melting process (SLM), an electron beam melting process (EBN), a fused layer modeling / manufacturing process (FLM / FFF), a fused deposition modeling process (FDM), a multi-jet modeling process (MJM), a poly-jet modeling process (PJM), a binder jetting process, a layer laminated manufacturing process (LLM), a digital light processing process (DLP), a thermal transfer sintering process (TTS) and / or a digital light synthesis process (DLS). [10] Machine tool with a fluid supply device according to any one of claims 1 to 9. [11] Vehicle part manufactured with a fluid supply device (16) according to any one of claims 1 to 9 and / or a machine tool according to claim 10.

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