MACHINE TOOL

Description

[0001] The invention relates to a machine tool, preferably a machine tool with a lifting device for at least one tool device comprising a tool, wherein, in particular, the machine tool is designed, at least with regard to the lifting device, in the manner of a press and / or a punching machine. JP 2005 324273 A discloses a machine tool according to the preamble of claim 1.

[0002] US 5 024 562 A discloses a drilling machine. US 2019 / 160615 A1 and US 2006 / 127191 A1 and DE 40 37 716 C1 disclose machines.

[0003] The object underlying the invention is to improve a machine tool with regard to flexibility and efficiency.

[0004] According to the invention, this object is achieved by a machine tool according to claim 1. Some advantageous embodiments are defined in the dependent claims.

[0005] For example, one advantage of the invention is that the driven and / or cutting tool enables a fast and robust manufacturing process and, in particular, the equipment with the lifting device enables fast cycle times in the machine tool to be achieved.

[0006] In particular, for large-volume forming processes, in which material must be removed from a specific area of the workpiece to be machined, the structures to be produced in the workpiece can be formed more effectively using a driven and / or cutting tool than in pressure forming processes such as pressing and / or embossing, since the material to be removed is not displaced but rather removed from the area to be machined, in particular by a cutting process. Preferably, the material structure in the workpiece remains essentially unchanged.

[0007] In particular, the solution according to the invention requires lower pressing forces in the lifting device than, for example, in pressure forming processes, so that smaller machine tools can be used.

[0008] Advantageously, the driven and / or cutting tool can also be used to quickly and precisely form more complex structures in the workpiece, for which several forming steps would be necessary using pressure forming processes.

[0009] In particular, the tool is mounted so as to be rotatable about a tool axis and is arranged in a driven manner in the tool device for rotation during machining of a workpiece.

[0010] Advantageously, the tool has one or more cutting edges for machining a workpiece. In particular, the one or more cutting edges are each formed along a chip flute on the tool.

[0011] In some advantageous embodiments, the tool is a drill.

[0012] In some advantageous embodiments, the tool is a milling cutter.

[0013] In some advantageous embodiments, the tool device has exactly one tool.

[0014] In some preferred embodiments, the tool device comprises a plurality of tools.

[0015] Advantageously, the tool device comprises a tool holder for a tool, preferably with a quick fastening mechanism, for example a clamping mechanism, which enables a quick change of the tool and thus the machine tool can be quickly converted for a different structure to be formed.

[0016] Advantageously, by selecting a suitable tool, various geometries for the structures to be formed can be produced by the machine tool.

[0017] In particular, the tool device has a drive for the driven tool.

[0018] Preferably, a power connection required for the drive is compatible with a power connection required for the lifting device, so that a power supply for the lifting device and for the drive can be implemented in a simple manner.

[0019] Alternatively or additionally, in advantageous embodiments, the object mentioned at the outset is also achieved by a machine tool which comprises a stripper plate, wherein the stripper plate comprises a through-opening for a tool of the machine tool assigned to it, wherein in particular at least during machining of a workpiece the assigned tool extends through the through-opening of the stripper plate.

[0020] In particular, one advantage of this is that when machining a workpiece, the associated tool reaches through the through-opening of the stripper plate and at least parts of the workpiece are covered by the stripper plate and are thus advantageously protected from contamination.

[0021] Preferably, the associated tool is a driven and / or cutting tool, as explained in particular above, and separated chips and / or particles produced during machining pass, for example, through the chip grooves of the tool onto a side of the stripper plate facing away from the workpiece, and contamination of the workpiece is at least reduced.

[0022] According to the invention, the machine tool has a lifting device for a tool device comprising the tool, in particular a lifting device with one or more of the features explained above and below.

[0023] In particular, the through-opening in the stripper plate has a geometric shape that corresponds to a structure to be formed by the tool in a workpiece to be machined.

[0024] In particular, this covers a part of the workpiece that is not to be machined by the tool and advantageously protects it from contamination.

[0025] In particular, an extension of the through opening corresponds to a radial extension of the tool at least in one direction.

[0026] In particular, the dimensions of the through-opening are measured in directions that are at least approximately perpendicular to a through-opening direction of the through-opening, wherein the through-opening extends in the through-direction through the stripper plate between two sides thereof.

[0027] The radial direction in which the radial extension of the tool is measured is, in particular, a radial direction of the tool axis. In particular, an axial direction of the tool axis corresponds to a feed direction of the tool.

[0028] In particular, the tool is mounted so that it can rotate around the tool axis.

[0029] In some advantageous embodiments, the through-opening in the stripper plate has a radial extension that essentially corresponds to the radial extension of the tool. The radial extensions of the through-opening and the tool are measured in a direction radial to the tool axis. In particular, the through-opening is designed to be at least essentially radially symmetrical to the tool axis.

[0030] In some advantageous embodiments, the radial extension of the tool is essentially constant along its axial extent.

[0031] In some advantageous embodiments, the tool has a radial extension that varies along the axial direction of the tool axis. Preferably, the radial extension of the through-opening is then configured to correspond to the largest radial extension of the tool.

[0032] In some advantageous embodiments, the tool device has at least one slider to which the tool is coupled, in particular fastened, and with the slider the tool can be moved in particular linearly.

[0033] Preferably, an elongated extension of the through-opening corresponds to a travel path of the at least one slider and, for example, the through-opening has a width that corresponds to a radial extension of the tool with respect to the tool axis.

[0034] In this case, the through opening advantageously has a length corresponding to the length of the travel path.

[0035] In particular, the extent of the through-opening corresponds in one direction to the extent of the tool and in another direction to the travel path of the tool when machining a workpiece, so that an area to be machined is exposed through the through-opening and adjacent areas of the workpiece are covered by the stripper plate and are thus advantageously protected from contamination.

[0036] In particular, the slider has a linear travel path.

[0037] In particular, the linear travel path of the slider is oriented in a direction radial to the tool axis.

[0038] Advantageously, the particularly linear travel path of the at least one slide is oriented at least approximately perpendicular to the stroke direction.

[0039] In particular, the lower part has a workpiece support on which a workpiece rests during machining by the associated tool.

[0040] In particular, when a workpiece is machined by the tool, the workpiece is fixed in position and / or its orientation on the workpiece support.

[0041] Advantageously, a machining space in which a workpiece to be machined is arranged during machining by the associated tool is arranged between the workpiece support and the stripper plate.

[0042] In particular, the workpiece support and the stripper plate limit the machining space on opposite sides.

[0043] In particular, the stripper plate is arranged in such a way that when a workpiece is machined by the associated tool, it rests on the workpiece, in particular in the area of a point on the workpiece to be machined.

[0044] In advantageous embodiments, it is provided that the machine tool comprises a holding device for a workpiece to be machined.

[0045] In particular, the holding device can be used to hold the workpiece to be machined stationary and / or in a fixed orientation during machining.

[0046] Advantageously, the holding device includes the stripper plate.

[0047] Preferably, the holding device is spring-loaded.

[0048] For example, the upper part of the machining station of the machine tool comprises a rigid frame and the holding device.

[0049] Advantageously, the rigid frame is coupled to the lifting device and the holding device is mounted so as to be movable relative to the frame at least in one direction, in particular in exactly one direction, in particular in the lifting direction.

[0050] Preferably, the holding device is mounted on the rigid frame with preload.

[0051] Advantageously, this enables the upper part to be moved in the stroke direction and when the holding device comes into contact with the workpiece, the workpiece is held by pressing on the holding device and the rigid frame can be moved further in the stroke direction.

[0052] In particular, the tool device is rigidly attached to the frame.

[0053] The machine tool comprises a chip space delimited in particular by wall sections and / or a base section and / or a cover section, wherein the chip space has a passage for a tool and the tool protrudes through the passage through the chip space at least when machining a workpiece.

[0054] Advantageously, the chip space is arranged in such a way that, when a workpiece is machined, chips separated by the tool enter the chip space, wherein in particular the separated chips enter the chip space via chip grooves in the tool.

[0055] In particular, this advantageously enables the separation of separated chips away from the workpiece into the chip space in order to at least reduce contamination of the workpiece with chips.

[0056] In particular, the passage through the chip space is formed by two opposite through openings in the element sections delimiting the chip space, wherein the tool reaches through these opposite through openings at least when machining a workpiece.

[0057] In preferred embodiments, one or more of the features explained above are provided, in particular with regard to the tool device, and / or the tool and / or the stripper plate and / or the lifting device and / or the processing station and its parts.

[0058] The stripper plate advantageously separates the chip space from the machining space.

[0059] It is preferably provided that the chip space is delimited by the stripper plate on a side facing a workpiece to be machined.

[0060] The machining area is advantageously located on one side of the stripper plate, while the chip space is located adjacent to the other. This advantageously enables particularly efficient separation of the separated chips.

[0061] In particular, a geometric passage axis is defined which runs through the passage and in particular through the passage openings.

[0062] In particular, the chip space is delimited in the axial direction of the passage axis by a base section and a cover section and in the radial direction of the passage axis by at least one wall section.

[0063] Preferably, the bottom section is formed by the scraper plate.

[0064] The machine tool comprises a suction device for suctioning away, in particular, chips cut off by the tool and / or, for example, dirt particles.

[0065] In favorable embodiments, it is provided that the stripper plate is arranged between a suction area from which the suction device sucks, and the processing space.

[0066] In particular, the extraction area is located on a side of the stripper plate which is opposite the side on which the machining area is located, and thus chips and / or particles which reach the side of the stripper plate opposite the machining area are extracted by the extraction device.

[0067] An extraction area of the extraction device is located in the chip space. The extraction area preferably corresponds to the volume of the chip space. Advantageously, the extraction device extracts any chips and / or particles that have entered the chip space.

[0068] It is particularly advantageous if the chip space with the extraction area is designed to promote turbulence.

[0069] Advantageously, vortices are created in the extraction area in a suction flow of the extraction device, which improves the removal of chips and / or particles.

[0070] The vortex-promoting design of the chip space can be realized in a variety of ways.

[0071] For example, the chip space with the extraction area is at least partially delimited by at least one curved wall section.

[0072] Preferably, an inlet opening for an inflowing gas flow opens into the chip space, wherein in particular gas extracted from the extraction area is replaced by the inflowing gas flow, so that the inflowing gas flow is a compensating gas flow.

[0073] In particular, an inlet encompassing the inlet opening is provided.

[0074] Preferably, the inlet defines an inlet direction for the gas flow flowing into the chip space.

[0075] It is particularly advantageous if the inlet direction is oriented at least substantially in the direction of a local extension of a wall section that defines the chip space and is arranged adjacent to the inlet opening. In particular, the inlet direction is oriented at least substantially tangentially to an arcuate shape of the wall section arranged adjacent to the inlet opening.

[0076] Advantageously, the incoming compensating flow flows along the wall section and is deflected in particular by its curved shape in order to form a vortex, preferably in a defined manner.

[0077] In particular, the suction device has a suction nozzle for suction.

[0078] Ideally, an extraction opening opens into the chip space, from which the extraction device extracts the material. For example, the extraction nozzle is located in the extraction opening.

[0079] In some advantageous embodiments, it is provided that the gas to be extracted is extracted in a vertical direction by the extraction device, in particular in a vertical direction from the chip space.

[0080] In particular, the vertical direction is aligned at least approximately parallel to the feed direction of the tool.

[0081] Advantageously, the vertical direction runs at least approximately perpendicular to a surface extension of the bottom section of the chip space and / or runs at least approximately perpendicular to a surface extension of the stripper plate.

[0082] In some advantageous embodiments, a ramp is provided which rises increasingly in the vertical direction.

[0083] Preferably, the ramp rises in particular continuously rising above the bottom section of the chip space and / or above a surface of the stripper plate, wherein this surface faces away from the machining space and delimits the chip space.

[0084] In particular, the ramp is arranged in the extraction area, preferably in the immediate vicinity of the extraction nozzle and / or the extraction opening.

[0085] Advantageously, a gas flow to be extracted is deflected from the ramp in a vertical direction and in particular fed to the extraction nozzle and / or to the extraction opening.

[0086] In some advantageous embodiments, it is provided that the machine tool comprises exactly one machining station for machining a workpiece.

[0087] In other advantageous embodiments, it is provided that the machine tool comprises a plurality of machining stations, wherein in particular a workpiece to be machined is conveyed from one machining station to the next for machining.

[0088] In particular, the machine tool is designed as a progressive tool machine.

[0089] In particular, the lifting device of the machine tool is designed for a linear movement of the tool device of the at least one processing station aligned in a lifting direction.

[0090] In particular, the precisely one processing station or each of the several processing stations comprises an upper part coupled to the lifting device and in particular linearly movable, and a stationary lower part, in particular with a workpiece support for supporting a workpiece to be processed.

[0091] In particular, the precisely one machining station or at least one machining station of the plurality of machining stations has a tool device with a driven and / or cutting tool, in particular as explained above.

[0092] If there are multiple processing stations, it is preferably provided that at least one processing station has a tool device comprising a pressure-forming tool. In particular, the pressure-forming tool is designed for punching and / or embossing.

[0093] In particular, a basic position is defined for the lifting device, from which the lifting device advantageously carries out the lifting movement of the respective strokes.

[0094] In particular, in the basic position at one or more processing stations, the respective processing space is sufficiently large so that a workpiece can be inserted into and removed from it.

[0095] In particular, an end position is defined for the lifting device, up to which the lifting device moves in the lifting direction during a respective stroke from the basic position.

[0096] In particular, a workpiece is machined in an end region of the travel path during a stroke, in particular up to the end position.

[0097] Advantageously, at least one loading position is provided in the lifting device, in which a workpiece to be machined is loaded in the machining space of the at least one machining station, in particular by the holding device, and is preferably held stationary and / or fixed in its orientation.

[0098] In particular, it is provided that when the lifting device performs a stroke from the basic position, at least one loading position is first reached and the stroke is then carried out up to the end position of the stroke.

[0099] In particular, a workpiece is machined by one or more tools of the machine tool between the at least one loading position and the end position.

[0100] In particular, the lifting device is designed to carry out only a predefined stroke from the basic position to the end position.

[0101] For example, the lifting device can only be moved in a defined position, in particular between the basic position and the end position.

[0102] In particular, only the end position is defined and with each stroke the lifting device moves to the same predefined end position.

[0103] For example, the end position is defined by at least one mechanical stop, wherein the lifting device executes the stroke until at least one spacer coupled to it strikes the stop.

[0104] Preferably, the lifting device is designed to carry out the respective, in particular predefined, stroke in a clocked manner.

[0105] In particular, this enables a fast, robust manufacturing process for mass production.

[0106] In particular, the machine tool is designed for a production line.

[0107] In particular, in advantageous embodiments, the object mentioned at the outset is also achieved by a production line with a machine tool having one or more of the features mentioned above.

[0108] In particular, the advantages explained in connection with the features mentioned above are also transferred to the production line, whereby the advantages have a particularly favorable effect, since the machine tool enables fast cycle times and robust production of a product in the production line.

[0109] Above and below, features which are described as being provided in particular and / or favorably and / or advantageously and / or for example and / or as preferred and / or the like are optional features which in particular represent inventive developments of the basic idea of the invention, but are not essential for the fundamental success of the invention.

[0110] In the foregoing and following, the wording “at least essentially” in connection with a statement is to be understood in particular to include technically irrelevant and / or technically induced deviations from the at least essentially stated statement.

[0111] Above and below, the wording "at least approximately" in connection with a feature is to be understood in particular to mean that this feature is at least essentially specified and / or that deviations, for example from the specified value, of up to + / -20%, preferably of up to + / -10%, in particular of up to + / -5%, are included in the at least approximately specified information.

[0112] Preferably, deviations of up to 10°, in particular of up to 5°, for example of up to 1° from an at least approximately and / or substantially specified direction are included.

[0113] Preferred embodiments and features of the invention and the advantages thereof are the subject of the exemplary embodiment with variants described below and shown as examples in the drawing.

[0114] The scope of protection is defined by the claims.

[0115] Preferred features and advantages of the invention are the subject of the following detailed description and drawing of an embodiment.

[0116] The drawing shows: Fig. 1 a perspective view of a machine tool; Fig. 2 a section through the machine tool; Fig. 3 a partially enlarged view of the section of the Fig. 2 in the area of a machining space, a tool and a stripper plate; Fig. 4 shows representations of various milling cutters as examples of cutting tools; Fig. 5 shows a section through a chip removal unit with a chip space and a stripper plate; Fig. 6 shows a further section through the chip removal unit; Fig. 7 shows a perspective view of a stripper element with a stripper plate; Fig. 8 shows a representation of a workpiece to be machined and machined; Fig. 9 shows a schematic representation of a progressive composite machine tool; Fig. 10 shows a representation of a tool device with a slide system.

[0117] An embodiment of a machine tool designated as a whole by 100, which is shown by way of example in the figures, comprises a machine frame 112 as a supporting structure, which has a machine base 114 for a safe and stationary stand of the machine tool 100, as well as at least one machining station 122 with a stationary lower part 124 formed from the machine frame 112 or firmly and rigidly connected thereto, and an upper part 126 movable relative to the lower part 124, as shown by way of example in the Fign. 1 and 2 is shown.

[0118] Between the lower part 124 and the upper part 126, a processing space 128 is defined, which is shown for example in Fig. 3 is shown.

[0119] The machining space 128 is provided and designed so that a workpiece to be machined can be machined therein at the machining station 122.

[0120] In particular, the lower part 124 comprises a workpiece support 132 which delimits the machining space 128 and is designed, for example, as a machine table, wherein, when a workpiece to be machined is machined, the workpiece rests on the workpiece support 132.

[0121] The upper part 126 is coupled to a lifting device (not explicitly shown in the drawing), by means of which the upper part 126 can be moved relative to the lower part 124 and in particular relative to the machine frame 112 in a linear lifting direction 142, and in particular the upper part 126 is acted upon by the lifting device in the lifting direction 142 in the direction of the lower part 124.

[0122] In particular, the lifting device is designed to carry out a defined lifting movement from a basic position in the lifting direction 142 in a time sequence, preferably in a clocked manner.

[0123] Thus, in particular, the machine tool 100 is designed in the manner of a press, at least with regard to the lifting device.

[0124] The upper part 126 comprises a rigid frame 144, which for example has a top plate 146 and a mounting plate 148, which is shown for example in Fig. 1 are shown, wherein the upper plate 146 and the fastening plate 148 are arranged offset from one another in the stroke direction 142 and the fastening plate 148 is arranged closer to the lower part 124. The upper plate 146 and the fastening plate 148 are rigidly connected to one another.

[0125] The lifting device is coupled to the rigid frame 144, in particular to the top plate 146.

[0126] In addition, the upper part 126 comprises a tool device 152 with a tool 154 for machining the workpiece.

[0127] In the variant shown as an example in the figures, the tool device 152 comprises exactly one tool 154.

[0128] In other variants of the embodiment, the tool device 152 comprises several tools 154.

[0129] The tool device 152 is firmly and preferably rigidly attached to the frame 144, for example to the mounting plate 148.

[0130] The tool 154 is arranged in the tool device 152 such that in a machining position of the upper part 126 relative to the lower part 124, the tool 154 projects into the machining space 128 and thus the workpiece can be machined by the tool 154 and in a home position the tool 154 is arranged at least partially outside the machining space 128, wherein the upper part 126 can be moved in the stroke direction 142 between at least the home position and the machining position by the lifting device, so that the stroke direction 142 also corresponds to a feed direction of the tool 154.

[0131] In particular, the tool 154 is arranged in the basic position so that the workpiece can be brought into the machining area from the machining operation and removed after machining.

[0132] The tool 154 is, in particular, a cutting tool, for example, a drill or a milling cutter, which advantageously has cutting edges for chip removal and, in particular, chip flutes along which the cutting edges extend. In particular, chips separated from the workpiece are removed by the cutting edges.

[0133] Examples include milling cutters in Fig. 4 shown, where the cutter is, for example, a Christmas tree cutter or a hemispherical cutter or a cutter with a different geometry or combination of geometries.

[0134] In particular, the tool 154 is a driven tool that is driven by a drive in the tool device 152 to move within the tool device 152, in particular to rotate about a tool axis 156. In particular, an axial direction of the tool axis 156 is aligned at least substantially parallel to the stroke direction 142.

[0135] Advantageously, the upper part 126 comprises a holding device 162 with which a workpiece to be machined can be held during its machining.

[0136] In particular, the holding device 162 comprises a holding plate 166, preferably spring-loaded with springs 164, which is mounted on the rigid frame by bearings 168 for movement in the direction of the linear stroke direction 142. In particular, the holding plate 166 is spring-loaded and movably mounted on the mounting plate 148.

[0137] The holding plate 166 is arranged opposite the lower part 124, in particular the workpiece support 132, in the stroke direction 142 and at least partially delimits the machining space 128.

[0138] During the lifting movement, the holding device 162, in particular with the holding plate 166, strikes a workpiece arranged in the processing space 128 and applies pressure to it in at least one application position.

[0139] A further movement of the frame 144 with the tool device 152 in the lifting direction 142 is possible during the stroke, since the holding device 162 is mounted on the frame 144 so as to be movable relative to the latter.

[0140] In particular, spacers 169 are provided which define a defined end position of the upper part 126 in the stroke direction 142.

[0141] For example, spacers 169I and 169II are formed on the rigid frame 144 and / or spacers 169III and 169IV are provided on the holding device 162. For example, one or more spacers 169I and 169II are arranged on the mounting plate 148, and a respective spacer 169III and 169IV opposite one of the spacers on the mounting plate is arranged on the holding plate 166.

[0142] At a maximum permitted stroke for the upper part 126, the spacers 169 form a stop so that the lifting movement is stopped and the lifting device moves the upper part 126 back to the basic position.

[0143] The holding device 162 comprises a stripper plate 172, which delimits the machining space 128 with a support side 176 facing the lower part 124, in particular the workpiece support 132, so that the machining space 128 is arranged in the stroke direction 142 between the lower part 124, in particular the workpiece support 132, and the stripper plate 172, as shown by way of example in Fig. 3 is shown.

[0144] Preferably, the stripper plate 172 is fixedly connected to the holding plate 166, in particular as part of a stress relief unit 174, wherein for this purpose the holding plate 166 has in particular a recess in which the stripper plate 172 and in particular the stress relief unit 174 are arranged.

[0145] Advantageously, the stripper plate 172 and in particular the chip removal unit 174 are fastened to the holding plate 166 by a positive fit and / or with fastening elements.

[0146] The relaxation unit 174 is exemplary in the Fign. 5 and 6 shown.

[0147] The stripper plate 172 has a through-opening 178 which extends continuously from the support side 176 to a side 186 of the stripper plate 172 which is opposite the axial direction of the tool axis 156 and thus a feed direction of the tool device 152 and faces away from the machining space 128.

[0148] The stripper plate 172 is aligned with the through-opening 178 in the holding device 162 in such a way that in the loading positions of the upper part 126, the support side 176 rests on the workpiece and, in addition, when machining a workpiece, i.e. in machining positions of the upper part 126, the tool 154 projects through the through-opening 178 and acts on the workpiece for machining.

[0149] In particular, an extension of the through-opening 178 is at least approximately perpendicular to its extension through the stripper plate 172 and thus an extension in the direction radial to the tool axis 156 is essentially the same size as an extension of the tool 154 in the direction radial to the tool axis 156, so that the tool 154 can reach through the through-opening 178, for example with some play, but essentially no free space is present between an edge of the through-opening 178 and the tool 154 when the tool 154 reaches through the through-opening 178.

[0150] Wall sections 192 extend from the stripper plate 172, in particular from its edge, in a direction at least approximately perpendicular to a surface extension of the stripper plate 172 as far as a cover element 194, so that a chip space 196 in the chip removal unit 174 is delimited by the stripper plate 172, the wall sections 192 and the cover element 194.

[0151] Preferably, the stripper plate 172 and the wall sections 192 together form a one-piece stripper element 198, which is shown for example in Fig. 7 is shown separately.

[0152] An engagement opening 212 for the tool 194 is formed in the cover element 194, through which the tool 154 engages in the chip space 196 and can extend through to the through opening 178 of the stripper plate 172, so that the inlet opening 212 and the through opening 178 together form a passage 214 through the chip removal unit 174 for the tool 154.

[0153] For this purpose, the engagement opening 212 is arranged opposite the through opening 178 in the feed direction 184 of the tool 154 and preferably a radial extension of the engagement opening 212 to the tool axis 156 is at least substantially the same size as the radial extension of the tool 154 to the tool axis 156, so that the tool 154 can engage through the engagement opening 212, for example with play, but with the engaging tool 154 there is substantially no free space between it and an edge of the engagement opening 212.

[0154] In particular, the passage 214 defines a geometric passage axis 216 which extends through the engagement opening 212 and the passage opening 178 and preferably substantially coincides with the tool axis 156.

[0155] Advantageously, the stripper plate 172 extends at least approximately perpendicular to the through-axis 216 in terms of area, and the support side 176 and the side 186 of the stripper plate facing away from the machining space 128 and delimiting the chip space 196 are opposite sides of the stripper plate 172 in the axial direction of the through-axis 216.

[0156] Advantageously, the chip space 196 is essentially delimited by the stripper plate 172 and the cover element 194 in the axial direction to the passage axis 216 and by the wall sections 192 in the radial direction to the passage axis 216, which are closed in a circumferential direction around the passage axis 216.

[0157] Preferably, one or more steps are formed on the stripper element 198, in particular on the wall sections 192 outside the chip space 196, with which the stripper element 198 can advantageously be inserted with a precise fit into the recess of the holding plate 166 and can be fixed in its position.

[0158] Furthermore, a suction device, designated as a whole by 222, is provided for sucking away particles and / or separated chips when machining a workpiece.

[0159] Advantageously, the suction device 222 is designed for suction from the chip space 196 and in particular has a suction nozzle 224 which is seated in a suction opening 226 which opens into the chip space 196 and is formed, for example, in the cover element 194.

[0160] In particular, the suction device 222 is arranged and configured such that a suction region 228, from which the suction device 222 extracts, encompasses the side 186 of the stripper plate 172 facing away from the processing space 128, so that the stripper plate 172 is arranged between the processing space 128 and the suction region 228. Advantageously, the suction region 228 encompasses at least one edge of the through-opening 178 on the side 186 facing away from the processing space 128.

[0161] It is particularly advantageous if the chip space 196 and its delimiting elements, here in particular the wall sections 192 and, for example, the cover element 194 and the stripper plate 172, are designed to promote vortex formation for a gas extracted by the extraction device 222, that is to say in particular that the geometric shape of the delimiting elements is designed such that they at least support vortex formation in a suction flow of the extracted gas generated by the extraction device 222.

[0162] Advantageously, a vortex center, around which one or more vortices rotate in a suction flow of the suction device 222, is formed in the region of the passage opening 178 and in the region of the passage 214.

[0163] Advantageously, the wall sections 192 are at least partially curved around the through-opening 178 and the through-axis 216, advantageously for vortex support.

[0164] For example, the wall sections 192 are arcuate, for example at least approximately circular, at least in an angular range of at least approximately 180°, preferably at least approximately 270°, around the passage axis 216.

[0165] In particular, an inlet opening 234 is provided which opens into the chip space 196 and through which a gas flow can enter the chip space 196 to compensate for the extracted gas.

[0166] Advantageously, an inlet direction 236 defined by the inlet opening 234 for the incoming gas flow is oriented substantially along an arcuate extension of a wall section 192, so that the incoming gas enters the chip space 196 at least substantially tangentially to the arcuate shape of the wall section 192 as unhindered as possible, and can flow further along the wall section 192 and deflected by it.

[0167] Advantageously, the stripper element 198 is provided with a ramp 242 which is in particular continuously raised over a geometric surface of the side 186 of the stripper plate 172 facing away from the processing space 128.

[0168] A surface of the ramp 242 merges in a transition region into the surface of the side 186 of the stripper plate 172 facing away from the machining space 128, and with increasing extension of the ramp 242 away from the transition region, its surface increasingly rises to a raised section of the ramp 242, wherein in the raised section the surface of the ramp 242 has a distance, which is measured in particular in the axial direction to the passage axis 216, from the surface of the stripper plate 172 facing away from the machining space 128.

[0169] Preferably, the suction opening 226 is formed in the region of the raised portion of the ramp 242, for example opposite the ramp in the cover element 194.

[0170] Advantageously, the wall section 192 is formed in an arc shape from the inlet opening 234 to the ramp 242 circumferentially around the passage axis 216.

[0171] It is particularly advantageous if the inlet opening 234 in the ramp 242 is formed in a section between the increasing raised surface of the ramp 242 and the stripper plate 172.

[0172] In brief, the design and functioning of the machine tool and its advantages are as follows.

[0173] The machine tool 100 comprises exactly one processing station 122 or a plurality of processing stations 122 and in particular a lifting device to which a respective upper part 126 of the one processing station 122 or of the plurality of processing stations 122 is coupled.

[0174] At at least one processing station 122, a tool device 152 has a tool 154 which is driven by a drive and / or which is a cutting tool 154.

[0175] This allows structures to be formed in workpieces in a simple manner, for example blind holes or other types of recesses, wherein the structure of the workpiece, for example a microstructure thereof, remains essentially unchanged by the machining of the tool 154.

[0176] For example, even larger workpieces can be efficiently produced in large quantities with corresponding structures without the machine tool having to be oversized and without multiple forming steps being required.

[0177] It is particularly advantageous if a stripper plate 172 with a through opening 178 for the tool 154 is provided at the processing station 122, in particular in a holding device 162 thereof.

[0178] When machining a workpiece in the machining space 128 by the tool 154, which extends through the through-opening 178 of the stripper plate 172, the stripper plate 172 rests with its support side 176 on the workpiece and chips separated by the tool 154 pass, in particular through the chip grooves of the tool 154, onto the side 186 of the stripper plate 172 facing away from the machining space 128, preferably into a chip space 196, so that contamination of the workpiece by separated chips and, for example, smaller particles is at least reduced.

[0179] According to the invention, a suction device 222 is provided, the suction area 228 of which the suction device 222 sucks off, is located in the chip space 196, so that the separated chips and, for example, particles are sucked off.

[0180] It is particularly advantageous if the elements delimiting the chip space 196 are designed to promote vortex formation, so that the suction in the gas, in particular the air, in the chip space 196 creates at least one vortex and thus improves the removal of chips and, for example, particles.

[0181] An example of a workpiece 262 to be machined and machined is shown in Fig. 8 shown.

[0182] In the workpiece 262, in particular a flat product, in particular a blind hole 264 and / or through holes 266 and, for example, a bursting membrane 268 are to be formed.

[0183] The blind hole 264 and / or the through holes 266 can be formed with the machine tool 100 in a simple manner by machining using the tool 154, in particular a milling cutter or drill.

[0184] In addition, for example, a predetermined breaking point section for the bursting membrane 266 can be embossed, in particular with a pressure-forming tool.

[0185] In variants of the embodiment in which a tool device 152 of a processing station 122 has the cutting and / or driven tool 154 and the pressure-forming tool, the processing is carried out by these in one processing step.

[0186] In variants in which tool devices 152 of different processing stations 122 have the cutting and / or driven tool 154 and the pressure-forming tool, the machining by these devices takes place in different processing steps on a workpiece. However, since the tool devices 152 are preferably coupled to the same lifting device, machining takes place during one stroke by both tools, but on different workpieces, which may be separate from one another or represent different areas of a semi-finished product.

[0187] For example, in a further processing step, the workpiece is separated from a semi-finished product, such as a sheet metal, which provides the raw material for the product.

[0188] In one variant of the machine tool 100, it is designed as a single-station machine, as shown for example in the Fign. 1 and 2 is shown.

[0189] In other variants of the machine tool 100, this is a progressive composite machine tool 100, as exemplified in Fig. 9 is shown, formed with a plurality of processing stations 122, each of which has a respective lower part 124 firmly and rigidly connected to the machine frame 112 and a respective upper part 126 movable relative to the lower part 124 in the stroke direction 142, and wherein at least most of the upper parts 126 are equipped with a respective tool device 152 with at least one tool 154.

[0190] In particular, the respective upper parts 126 of the processing stations 122 are coupled to the lifting device and are moved together in the lifting direction 142 towards the respective lower part 124 during a lifting movement of the lifting device.

[0191] In particular, during each lifting movement of the lifting device, a respective corresponding workpiece is machined by the respective tool 154 at at least several of the machining stations 122.

[0192] At least one processing station 122 of the plurality of processing stations is designed as explained above.

[0193] The progressive composite machine tool 100 further comprises, in particular, a transport device for transporting a workpiece from one processing station 122 to the next, so that it is machined step by step by tools 154 of the different processing stations 122.

[0194] In some preferred variants, the tool 154 is arranged stationary in the tool device 152.

[0195] In particular, the tool 154 is fixed in the tool device 152 and is mounted so as to be rotatable, for example, only about the tool axis 156.

[0196] The feed is provided by the lifting device.

[0197] In some advantageous variants of a machining station 122, its tool device 152 with the driven and / or cutting tool 154 has a slide system 282 with at least one slide 284, as shown by way of example in Fig. 10 is shown.

[0198] In this case, the at least one slider 284 is mounted so as to be movable, in particular transversely, for example at least approximately perpendicularly, to the feed direction 184 of the tool 154 and / or in the radial direction to the tool axis 156, in particular linearly in a slider direction 288.

[0199] The tool 154 is attached to the slide 284 so that it moves with the slide 284. Thus, the tool 154 can be moved in at least one further degree of freedom by the slide 284, and more complex, i.e., in particular, non-rotationally symmetrical, structures can be formed in the workpiece to be machined, preferably by machining, in particular by milling.

[0200] In particular, the through-opening 178 and, for example, the engagement opening 212 are designed accordingly to the particularly linear movability of the tool 154 by the at least one slider 284, thus preferably having an elongated extension in the slider direction 288 in which the tool 154 is movable by the slider 284.

[0201] In particular, in these variants, the tool 154 is also mounted so as to be rotatable about the tool axis 156. LIST OF REFERENCE SYMBOLS

[0202] 100Machine tool 112Machine frame 114Machine base 122Machining station 124Lower part 126Upper part 128Machining space 132Support 142Stroke direction 144Rigid frame 146Top plate 148Fastening plate 152Tool fixture 154Tool 156Tool axis 158Fastening device 162Holding device 164Spring 166Holding plate 168Bearing 169Spacer 172Stripper plate 174Chip removal unit 176Support side 178Through opening 184Feed direction 186Side facing away from machining space 192Wall section 194Cover element 196Chip space 198Stripper element 212Access opening 214Through 216Through axis 222Suction device 224Suction nozzle 226Suction opening 228Suction area 234Inlet opening 236Inlet direction 242Ramp 262Workpiece 264Blind hole 266Through hole 268Bursting membrane 282Slide system 284Slide 288Slide direction

Claims

1. Machine tool (100) which is a press and / or punching machine, comprising a lifting device (142) for at least one tool device (152) having a tool (154), the tool (154) being a driven and / or cutting tool (154), characterized in that the machine tool (100) comprises a chip space (196), the chip space (196) having a passage (214) for the tool (154) and the tool (154) projecting through the chip space (196) through the passage (214) at least during machining of a workpiece, the machine tool (100) comprises a suction device (222) for suctioning off in particular chips separated by the tool (154) and / or dirt particles, and a suction region (228) of the suction device (222) is located in the chip space (196), a plurality of tools are coupled to the lifting device (142).

2. Machine tool (100) according to claim 1, characterized in that the tool (154) is rotatably mounted and driven in the tool device (152) for rotation about a tool axis (156) during machining of a workpiece, in particular the tool (154) being a drill or milling cutter.

3. Machine tool (100) according to either of the preceding claims, characterized in that the tool device (152) comprises a drive for the driven tool (154).

4. Machine tool (100) according to any of the preceding claims, characterized in that this comprises a stripper plate (172) and the stripper plate (172) comprises a through-opening (178) for a tool (154) of the machine tool (100) assigned thereto, in particular it is further provided - that in particular at least during machining of a workpiece, the assigned tool (154) extends through the through-opening (178) of the stripper plate (172) and / or - that in particular the through-opening (178) in the stripper plate (172) has a geometric shape which corresponds to a structure to be formed in a workpiece to be machined by the tool (154) and / or - that in particular at least in one direction an extension of the through-opening (178) in the stripper plate (172) corresponds to a radial extension of the tool (154), the radial extension being measured in a radial direction of a tool axis (156) and the axial direction of the tool axis (156) corresponding to a feed direction (184) of the tool (154).

5. Machine tool (100) according to any of the preceding claims, characterized in that the tool device (152) has at least one slider (284) to which the tool (154) is coupled and with which the tool (154) can be moved, in particular linearly, in particular a through-opening (178) in a stripper plate (172) having a width which corresponds to a radial extension of the tool (154) with respect to a tool axis (156), an axial direction of the tool axis (156) corresponding to a feed direction (184) of the tool, and an elongate extension of the through-opening (178) corresponding to a travel path of the at least one slider (284).

6. Machine tool (100) according to any of the preceding claims, characterized in that a stripper plate (172) is arranged opposite a workpiece support (132) and a machining space (128) is arranged between the workpiece support (132) and the stripper plate (172) and is in particular delimited thereby on opposite sides.

7. Machine tool (100) according to any of the preceding claims, characterized in that a holding device (162) for a workpiece comprises a stripper plate (172), in particular the holding device being mounted in a spring-loaded manner.

8. Machine tool (100) according to any of the preceding claims, characterized in that - the chip space (196) is delimited by wall portions and / or a base portion and / or a cover portion and / or - the chip space (196) is arranged in such a way that chips separated by the tool (154) during machining of a workpiece reach the chip space (196), in particular via chip grooves in the tool (154).

9. Machine tool (100) according to any of claims 4 to 8, characterized in that - the stripper plate (172) separates the chip space (196) from the machining space (128) and / or - the chip space (196) is delimited by the stripper plate (172) on a side facing a workpiece to be machined.

10. Machine tool (100) according to any of the preceding claims, characterized in that - a stripper plate (172) is arranged between the suction region (228) from which the suction device (222) suctions and a machining space (128) and / or - the chip space (196) having the suction region (228) is designed to promote turbulence and / or - the chip space (196) having the suction region (228) is delimited at least in portions by at least one arcuate wall portion (192).

11. Machine tool (100) according to any of the preceding claims, characterized in that an inlet opening (234) for an inflowing gas flow, through which gas suctioned from the suction region (228) is replaced, opens into the chip space (196), in particular an inlet direction (236) defined by an inlet that comprises the inlet opening (234) for the gas flow that flows into the chip space (196) being oriented at least substantially in the direction of a local extent of a wall portion (156) that delimits the chip space (196) and is arranged adjacent to the inlet opening, in particular being oriented at least substantially tangentially to an arcuate shape of the wall portion (156).

12. Machine tool (100) according to any of the preceding claims, characterized in that a ramp (242) is provided which in particular rises increasingly in the vertical direction and which in particular deflects a gas flow to be suctioned off in the vertical direction.

13. Machine tool (100) according to any of the preceding claims, characterized in that the lifting device is designed for a linear movement of the at least one tool device (152) aligned in a lifting direction (142).

14. Machine tool (100) according to the preceding claim, characterized in that the machine tool (100) is a progressive tool machine.

15. Production line comprising at least one machine tool (100) according to any of the preceding claims.