Clear view screen and machine tool with clear view screen

Abstract

A clear viewing window (1) for arrangement in a line of sight into the working area (2) of a machine tool (3) for machining workpieces using coolant, wherein the clear viewing window (1) has a layer structure (4) comprising a transparent carrier layer 5 and on this a transparent, coolant-repellent layer (6).

Description

[0001] The invention relates to a transparent window and a machine tool with a transparent window.

[0002] DE 102 04 777 A1 discloses a machine tool, in particular for machining, with surfaces that are wetted with liquid, wherein the surfaces are self-cleaning and have a structure of elevations and depressions.

[0003] DE 91 07 122 U1 discloses a safety window, particularly for sliding covers used on machine tools or test benches, comprising an outer pane of safety glass and an inner pane of a puncture-resistant plastic, which are held together in a supporting frame at a distance from each other. A transparent protective film, preferably highly vapor-tight, is applied to the outer face of the outer pane.

[0004] DE 10 2005 007 691 B3 discloses a machine housing for a working machine, in particular a packaging machine for the pharmaceutical industry, having an installation space delimited by a plurality of side walls, which is accessible through a door with at least two door leaves, wherein the door is formed by a folding door, the door leaves of which are detachably and pivotably connected to one another on the mutually facing sides.

[0005] Cooling lubricants are often used in machine tools used, for example, for machining metal workpieces. The cooling lubricant is injected into the cutting area of ​​a tool on the workpiece and serves to cool the workpiece and the tool, as well as to lubricate and ultimately remove chips and heat from the cutting area of ​​the tool.

[0006] The cooling lubricant is typically injected into the tool's engagement area at comparatively high pressure and in large quantities. As the tool and / or workpiece rotate, the cooling lubricant is widely distributed throughout the machine tool's work area, also reaching the inside of a viewing window of the machine tool, where the workpiece is being machined. A viewing window contaminated with cooling lubricant can significantly impede visual inspection of the machining process within the machine tool's work area.

[0007] The object of the invention is therefore to simplify visual inspection during the machining of workpieces in which cooling lubricants are used.

[0008] To solve the problem, a transparent pane with the means and features of the independent claim directed to such a transparent pane is proposed. To solve the problem, a transparent pane is proposed for arrangement in a line of sight into the work area of ​​a machine tool for machining workpieces using cooling lubricant. The transparent pane has a layered structure comprising a transparent carrier layer and, on this layer, a transparent, cooling lubricant-repellent layer. When the transparent pane is in the use position, the transparent, cooling lubricant-repellent layer can be arranged or formed on a side of the carrier layer facing the work area of ​​the machine tool.

[0009] The transparent window can also be retrofitted to a machine tool viewing window if necessary. To do this, the transparent window can be attached to the inside of the machine tool viewing window, facing the machine tool's work area. The cooling lubricant-repellent layer of the transparent window then faces the work area. As soon as cooling lubricant comes into contact with the cooling lubricant-repellent layer of the transparent window, the cooling lubricant can run off and / or bead up from this layer. This prevents cooling lubricant from adhering to the cooling lubricant-repellent layer of the transparent window and the resulting restricted visibility. A visual inspection of the work area and any machining processes taking place therein is then still possible, even when cooling lubricant is used.

[0010] Furthermore, the transparent window can protect the viewing window of a machine tool from damage. The transparent window can prevent the underlying area of ​​the viewing window, which is often made of glass, from coming into contact with chips and coolant, which could otherwise be damaged. In this way, the transparent window can effectively prevent damage to the viewing window of the machine tool.

[0011] If the transparent window is worn, it can be relatively easily removed from the machine tool's viewing window and replaced with a new, undamaged transparent window. This avoids the need for a costly replacement of the machine tool's viewing window.

[0012] In one embodiment of the transparent pane, it is provided that the cooling lubricant-repellent layer is a coating of the carrier layer of the transparent pane.

[0013] The transparent panel can be designed and / or intended for attachment to a viewing window of a machine tool. In this embodiment of the transparent panel, it is designed for retrofitting an existing viewing window of a machine tool. According to the invention, the transparent panel is designed as an adhesive pad.

[0014] According to the invention, the layer structure comprises an adhesive layer arranged on a back side of the carrier layer facing away from the cooling lubricant-repellent layer. The adhesive layer is also preferably transparent, so that it does not impair visibility through the layer structure of the transparent pane. The adhesive layer makes it possible to attach the transparent pane to an existing viewing window of a machine tool. The adhesive layer can be designed as an adhesive layer.

[0015] According to the invention, the adhesive layer is covered with a removable protective cover, in particular with a protective film and / or paper. This initially provides good protection for the adhesive layer. If the transparent panel is to be attached to a machine tool window, the removable protective cover can be removed from the adhesive layer and the transparent panel can be glued to the window of a machine tool in the desired position. The protective cover can have a pull-off tab to facilitate the removal of the protective cover from the adhesive layer.

[0016] In one embodiment, the transparent pane is designed as a viewing window of a machine tool. Thus, the transparent pane as a whole forms the viewing window of a machine tool.

[0017] The cooling lubricant-repellent layer can consist of and / or comprise a hydrophobic coating. The hydrophobic coating can, for example, consist of one or more inorganic-organic hybrid polymers. Such hybrid polymers are particularly suitable for creating the hydrophobic coating due to their properties.

[0018] The carrier layer can consist of a plate and / or a film and / or plastic. The carrier layer is preferably made of polyethylene terephthalate (PET).

[0019] According to the invention, the layer structure comprises a hard coating. The hard coating can increase the wear resistance of the transparent panel. This is particularly important when the transparent panel is used in an environment where it is exposed to increased mechanical stress, for example, in the work area of ​​a lathe, where abrasive particles such as chips can impact the transparent panel. The hard coating can consist, for example, of a polysiloxane coating.

[0020] To achieve the object, a machine tool for machining workpieces using cooling lubricant is also proposed, wherein the machine tool has a transparent window according to one of the claims directed to such a window. In one embodiment of the machine tool, the transparent window is designed as a viewing window of the machine tool in a line of sight into a work space of the machine tool. In another embodiment of the machine tool, the transparent window is arranged in a line of sight into a work space of the machine tool on an inner side of a viewing window of the machine tool, in particular is adhesively bonded to the inner side. In this embodiment of the machine tool, a transparent window designed as an adhesive pad is preferably used.

[0021] The invention is described in more detail below using an exemplary embodiment, but is not limited to this embodiment. Further exemplary embodiments result from combining the features of individual or multiple claims with one another and / or by combining individual or multiple features of the exemplary embodiment. They show: Fig. 1 a perspective view of a machine tool with a transparent window arranged on an inner side of a viewing window of the machine tool in a working space of the machine tool, Fig. 2 a perspective view of the Fig. 1 shown transparent panel designed as an adhesive pad to illustrate its layer structure, Fig. 3 a schematic sectional view of the layer structure of the Fig. 2 shown transparent panel, as well as Fig. 4 a front view of the Fig. 1 shown machine tool.

[0022] All figures show a transparent panel, designated as a whole by 1, which is designed as an adhesive pad and is intended for placement in a line of sight in the work area 2 of a machine tool 3. The machine tool 3 is designed for machining workpieces using cooling lubricant.

[0023] The transparent pane 1 comprises a layer structure 4 comprising a transparent carrier layer 5 and a transparent, cooling lubricant-repellent layer 6. The cooling lubricant-repellent layer 6 is arranged on a side of the carrier layer 5 facing the working space 2 of the machine tool 3 in the use position of the transparent pane 1.

[0024] The cooling lubricant-repellent layer 6 can be formed as a coating of the carrier layer 5.

[0025] The Fig. 2 and Fig. 3 further show that the layer structure 4 of the transparent pane 1 comprises an adhesive layer 7, which is arranged on a rear side of the carrier layer 5 facing away from the cooling lubricant-repellent layer 6 and is designed as an adhesive layer. The adhesive layer 7 is also transparent, at least when the transparent pane 1 is glued in the use position.

[0026] The adhesive layer 7 is covered with a removable protective cover 8, for example, made of protective film and / or paper. To attach the transparent panel 1, this protective cover 8 can be removed. This exposes the adhesive layer 7.

[0027] The transparent panel 1 shown in the figures is designed to be attached to a viewing panel 9, for example the one shown in the Fig. 1 and Fig. 4. In an embodiment of the transparent window 1 not shown in the figures, the transparent window itself is designed as a viewing window of a machine tool.

[0028] The cooling lubricant-repellent layer 6 can, for example, consist of a hydrophobic coating or at least have a hydrophobic coating. The hydrophobic coating causes cooling lubricant impinging on the transparent pane 1 to bead up and roll off the transparent pane 1. The hydrophobic coating consists of inorganic-organic hybrid polymers.

[0029] The carrier layer 5 of the layer structure 4 of the transparent pane 1 consists of plastic, namely polyethylene terephthalate (PET) and is in the form of a plate or in the form of a film.

[0030] The layer structure 4 of the transparent pane 1 also includes a hard layer 11 formed between the carrier layer 5 and the cooling lubricant-repellent layer 6. The hard layer 11 consists of a polysiloxane lacquer layer applied to the carrier layer 5 and increases the wear resistance of the transparent pane 1.

[0031] In order to enable a view into the working area 2 of the machine tool 3 even when cooling lubricant is used in the working area 2, the machine tool 3 is equipped with the transparent window 1.

[0032] For this purpose, the transparent window 1 is arranged on an inner side 10 of the viewing window 9 of the machine tool 3 facing the working space 2 of the machine tool 3 and is thereby arranged in a line of sight into the working space 2 of the machine tool 3, namely, it is glued to the inner side 10 of the viewing window 9. The machine tool 3 is designed as a CNC machine. List of reference symbols 1 transparent panel 2 work space 3 machine tools 4 Layer structure 5 Carrier layer 6 Cooling lubricant repellent layer 7 Adhesive layer 8 Protective cover 9 Viewing window 10 inside of 9 11 Hard layer 12 Pull tab on 8

Claims

[1] Transparent pane (1) for arrangement in a line of sight in the working space (2) of a machine tool (3) for machining workpieces using cooling lubricant, wherein the transparent pane (1) has a layer structure (4) which comprises a transparent carrier layer (5) and on this a transparent, cooling lubricant-repellent layer (6), in particular which is arranged or formed on a side of the carrier layer (5) facing the working space (2) of the machine tool (2) in the use position of the transparent pane (1), characterized bythat the transparent pane (1) is designed as an adhesive pad, that the layer structure (4) comprises an adhesive layer (7) which is arranged on a rear side of the carrier layer (5) facing away from the cooling lubricant-repellent layer (6), wherein the adhesive layer (7) is covered with a removable protective cover (8), and wherein the layer structure (4) comprises a hard layer (11) which is formed between the carrier layer (5) and the cooling lubricant-repellent layer (6). [2] Transparent pane (1) according to the preceding claim, wherein the cooling lubricant-repellent layer (6) is a coating of the carrier layer (5). [3] Transparent pane (1) according to one of the preceding claims, wherein the transparent pane (1) is designed and / or provided for attachment to a viewing window (9) of a machine tool (3). [4] Transparent pane (1) according to the preceding claim, wherein the adhesive layer (7) is transparent and / or designed as an adhesive layer. [5] Transparent panel (1) according to one of the two preceding claims, wherein the removable protective cover (8) is protective film and / or paper and / or wherein the protective cover (8) has a pull-off tab (12). [6] Transparent window (1) according to one of the preceding claims, wherein the transparent window (1) is designed as a viewing window (9) of a machine tool (3). [7] Transparent pane (1) according to one of the preceding claims, wherein the cooling lubricant-repellent layer (6) comprises a hydrophobic coating or consists of a hydrophobic coating, in particular wherein the hydrophobic coating consists of one or more inorganic-organic hybrid polymers. [8] Transparent pane (1) according to one of the preceding claims, wherein the carrier layer (5) consists of a plate and / or a film and / or of plastic, preferably of polyethylene terephthalate (PET). [9] Transparent pane (1) according to one of the preceding claims, wherein the hard layer (10) consists of polysiloxane lacquer. [10] Machine tool (3) for machining workpieces using cooling lubricant with a transparent window (1) according to one of the preceding claims. [11] Machine tool (3) according to the preceding claim, wherein the transparent pane (1) is designed as a viewing window (9) of the machine tool (3) in a line of sight into a working space (2) of the machine tool (3), or wherein the transparent pane (1) is arranged in a line of sight into a working space (2) of the machine tool (3) on an inner side (10) of a viewing window (9) of the machine tool (3), in particular is glued to the inner side (10).

Images