Machine Frame For A Machine Tool and Machine Tool

Abstract

A machine frame for a machine tool is disclosed having two longitudinal members running in a first direction and two transverse members connecting the longitudinal members and running in a second direction running transversely to the first direction, wherein the longitudinal members and transverse members define a machining space for the machine tool (200), at least two, preferably at least four, first floor fastening units for the predominant transmission of forces in the first direction into a foundation, wherein the first floor fastening units are fastened to ends of the longitudinal members, and at least two second floor fastening units for the predominant transmission of forces in the second direction into a foundation, wherein the second floor fastening units are fastened to at least one of the longitudinal members in its central region, wherein one, preferably exactly one, longitudinal member with the second floor fastening units has a cross-sectional geometry for the predominant force transfer in the second direction.

Claims

1. A machine frame for a machine tool, comprising: two longitudinal members running in a first direction and two transverse members connecting the longitudinal members and running in a second direction running transversely to the first direction, wherein the longitudinal members and transverse members define a machining space for the machine tool, at least one of two and at least four floor fastening units configured to predominantly transmit forces in the first direction into a foundation, wherein the first floor fastening units are fastened to ends of the longitudinal members, and at least two second floor fastening units configured to predominantly transmit forces in the second direction into a foundation, wherein the second floor fastening units are fastened to at least one of the longitudinal members in its central region, wherein one longitudinal member to which the second floor fastening units is fastened has a cross-sectional geometry for the predominant force transfer in the second direction, the cross sectional geometry has a triangular cross-section with an angled outer panel and/or angled inner panel, where a surface element is inserted into the cross-section in a force fitting manner, the second floor fastening unit has an inner floor fastening arranged in the machining space and an outer floor fastening arranged outside the machining space, wherein the surface element connects the two floor fastenings and wherein the floor fastenings and the surface element are arranged in a plane perpendicular to the longitudinal member

2. (canceled)

3. (canceled)

4. The machine frame for a machine tool according to claim 1, wherein at least one surface element is arranged between the inner panel and the outer panel in a structure-reinforcing manner.

5. (canceled)

6. The machine frame for a machine tool according to claim 1, wherein the floor fastening has a leg configured to be screwed to the longitudinal member.

7. The machine frame for a machine tool according to claim 1, wherein the floor fastening is arranged on a leg of the surface element, wherein the leg protrudes from the longitudinal member.

8. The machine frame for a machine tool according to claim 1, wherein the leg is connected to a floor element which can be fastened to the foundation via two elongated holes and corresponding screw connections.

9. The machine frame for a machine tool according claim 1, wherein the adjusting screws, which are in contact with a floor element configured to be fastened to the foundation and fastened to the leg, are arranged on both sides of the leg.

10. A machine tool designed for machining workpieces in a machining space, the machine tool comprising: two longitudinal members running in a first direction and two transvers members connecting the longitudinal members and running in a second direction running transversely to the first direction, wherein the longitudinal members and transverse members define a machining space for the machine tool, at least one of two and at least four first floor fastening units configured to predominantly transmit forces in the first direction into a foundation, wherein the first floor fastening units are fastened to ends of the longitudinal members, and at least two second floor fastening units configured to predominantly transmit forces in the second direction into a foundation, wherein the second floor fastening units are fastened to at least one of the longitudinal members in its central region, wherein one longitudinal member to which the second floor fastening units is fastened has a cross-sectional geometry for the predominant force transfer in the second direction, the cross-sectional geometry has a triangular cross-section with an angled outer panel and/or an angled inner panel, where a surface element is inserted into the cross-section in a force fitting manner, the second floor fastening unit has an inner floor fastening arranged in the machining space and an outer floor fastening arranged outside the machining space, wherein the surface element connects the two floor fastenings and wherein the floor fastenings and the surface element are arranged in a plane perpendicular to the longitudinal member.

11. The machine tool according to claim 10, further comprising a portal element configured to be moved in the machining space in the X-direction and Y-direction.

12. The machine tool according to claim 11, wherein: the machine tool is a laser machining tool; and the portal element is a laser cutting head arranged on a bridge.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

[0034] Further advantages features and details of the various embodiments of this disclosure will become apparatus from the ensuing description of a preferred exemplary embodiment or embodiments and further with the aid of the drawings. The features and combinations of features recited below in the description, as well as the features and feature combination shown after that in the drawing description or in the drawings alone, may be used not only in the combination recited but also in other combinations on their own without departing from the scope of the disclosure.

[0035] The invention will be explained below in exemplary embodiments with reference to the accompanying drawings. In the figures:

[0036] FIG. 1 shows a top view of a machine frame for a machine tool;

[0037] FIG. 2 shows a perspective sectional view of a longitudinal member of the machine frame;

[0038] FIG. 3 shows a perspective view of a leg with the floor fastening;

[0039] FIG. 4 shows a top view of the leg with the floor fastening; and

[0040] FIG. 5 shows a perspective view of a machine tool with a machine frame.

DETAILED DESCRIPTION OF THE INVENTION

[0041] As used throughout the present disclosure, unless specifically stated otherwise, the term “or” encompasses all possible combinations, except where infeasible. For example, the expression “A or B” shall mean A alone, B alone, or A and B together. If it is stated that a component includes “A, B, or C”, then, unless specifically stated otherwise or infeasible, the component may include A, or B, or C, or A and B, or A and C, or B and C, or A and B and C. Expressions such as “at least one of” do not necessarily modify an entirety of the following list and do not necessarily modify each member of the list, such that “at least one of “A, B, and C” should be understood as including only one of A, only one of B, only one of C, or any combination of A, B, and C.

[0042] FIG. 1 shows a top view of a machine frame 100 for a machine tool. The machine frame 100 has two parallel longitudinal members 101 running in a first or X-direction. The two longitudinal members 101 are each connected in their end regions via a transverse member 102, wherein the transverse members 102 extend in a second or Y-direction. The four members span a machining space 103 for the machine tool in the X-Y plane. For the sake of clarity, the coordinate X is used for the first direction and Y for the second direction.

[0043] The machine frame 100 forms the base for a machine tool, for example in the form of a laser cutting tool. A machine tool with a machine frame 100 is described below with reference to FIG. 1.

[0044] The machine frame 100 comprises at least two X floor fastening units 104 for the predominant transmission of forces and/or torques in the X-direction into a foundation, such as a factory floor. Four of the X floor fastening units 104 are fastened in end regions of the longitudinal members 101. The X floor fastening units 104 are preferably arranged close to the introduction of force in the region of the transverse members 102. Further X floor fastening units 104 can be arranged in the central regions and/or in the end regions of the longitudinal members 101.

[0045] The machine frame 100 further comprises at least two Y floor fastening units 105 for the predominant transmission of forces and/or torques in the Y-direction into a foundation, wherein the Y floor fastening units 105 are fastened to at least one of the longitudinal members 101 in the central region thereof. The Y floor fastening units 105 are preferably arranged in a machining region or cutting region of the machine tool. The Y floor fastening units 105 are preferably fastened to only one of the longitudinal members 101; only this longitudinal member 101 has a fixed position, while the second longitudinal member 101 is then elastically connected. In the view in FIG. 1, the lower longitudinal member 101 has a fixed position.

[0046] For example, the movement of a portal or a bridge with a laser cutting head or the like creates forces and/or torques that are diverted into the foundation via the machine frame 100.

[0047] According to the machine frame 100, these forces and/or torques are derived specifically. This means that the X floor fastening units 104 mainly dissipate the forces in the X-direction, while the Y floor fastening units 105 mainly dissipate the forces in the Y-direction. This division allows an optimised and modular design of the machine tools. The floor fastening units 104 and 105 preferably absorb at least 90% of the respective forces in the first (X) or second (Y) direction.

[0048] FIG. 2 shows a perspective sectional view of the longitudinal member 101 of the machine frame 100. The longitudinal member 101 is shown with a Y floor fastening unit 105.

[0049] The longitudinal member 101 has a cross-sectional geometry with a triangular cross-section, here with an angled outer panel 106 and a step-shaped inner panel 107. The inner panel 107 can consist of one or a plurality of parts and also follows an angled line starting from a tip 108 of the longitudinal member 101 to a base 109 of the longitudinal member 101. The outer panel 106, the inner panel 107 and the base 109 form at least approximately a triangle.

[0050] The outer panel 106 is preferably formed in one piece and runs at an angle between 15 and 45 degrees to the vertical (Z-direction) or to a central, vertical stiffening rib 110 of the longitudinal member 101.

[0051] The Y floor fastening unit 105 comprises or consists of an inner floor fastening 111 arranged in the machining space, an outer floor fastening 112 arranged outside the machining space and a surface element 113 connecting the two floor fastenings. The floor fastenings and the surface element 113 are arranged in a plane perpendicular to the longitudinal member 101. The surface element 113 is inserted into the cross-section of the longitudinal member 101 in a force-fitting manner.

[0052] The surface element 113 is preferably a panel and can be referred to as a transverse rib.

[0053] The outer floor fastening 112 comprises a (first) leg 114 that can be screwed to the longitudinal member 101. The leg 114 extends in the Y-direction and is fastened in the region of the base 109 of the longitudinal member 101. The leg 114 thus extends the base or the contact surface of the longitudinal member 101.

[0054] The inner floor fastening 111 is arranged on a (second) leg 115 of the surface element 113, wherein the leg 115 protrudes from the longitudinal member 101. The leg 115 thus also extends the base or the contact surface of the longitudinal member 101. Both the outer floor fastening 112 and the inner floor fastening 111 can each have a screwable leg or be arranged on a leg 115 of the surface element 113.

[0055] The floor fastenings serve to introduce forces and/or torques of the longitudinal member 101 into a foundation or to fasten and hold a machine frame or a machine tool. A force that is introduced in the region of the tip 108 of the longitudinal member 101 is first divided into two partial forces A and B and then transmitted in the longitudinal member 101 to its base 109. This is done in particular by the outer panel 106 and the inner panel 107, but also by the surface element 113.

[0056] Then the two partial forces A and B are diverted via the legs 114, 115 or the inner floor fastening 111 and the outer floor fastening 112 into a foundation (not shown).

[0057] FIG. 3 shows a perspective view of an outer floor fastening 112 with a leg 114 with a floor element 119 fastened thereto. The floor element 119 can be fastened to the foundation with screws and dowels, for example.

[0058] The leg 114 and the floor element 119 are fastened to one another via two elongated holes 116 and corresponding screw connections 117. The elongated holes 116 extend in the Z-direction, so that the machine frame can be adjusted in height (Z-direction). This connection also allows the angle about X to be adjusted to compensate for uneven floors.

[0059] FIG. 4 shows a top view of the outer floor fastening 112 with a leg 114 with a floor element 119 fastened thereto.

[0060] Adjusting screws 118 which are in contact with a floor element 119 that is fastened to the leg 114, are provided on both sides of the leg 114. The two adjusting screws 118 can push the side part in both directions for alignment. For this purpose, for example, a vertical projection can be formed on the floor element 119 as a counter bearing to the adjusting screws 118.

[0061] FIG. 5 shows a perspective view of a machine tool in the form of a laser cutting tool 200 with a machine frame 100. The machine frame 100 has two longitudinal members 101 and two transverse members 102.

[0062] The laser cutting tool 200 comprises a laser cutting head 201 configured for cutting parts from a metallic workpiece 202 that is plate-shaped in this case. For this purpose, a laser cutting power in the range of usually at least 1 kW, preferably greater than or equal to 3 kW, is provided. The laser cutting head 201 is arranged on a bridge 203 that can be moved in the machining space 103 in the X-direction and Y-direction.

[0063] A changing table of the laser cutting tool 200 for receiving at least one workpiece 202 can be provided in the machining space 103 or workpiece region. The changing table here can correspond to the machining space, or the machining space of the laser cutting tool 200 or the machine frame 100 is limited by the dimensions of the changing station.

[0064] The bridge 203 or a portal can move on or to the two longitudinal members 101. The movable portal can move on rails which are attached to the longitudinal members 101

[0065] The machine frame according to the invention for a machine tool has the advantage that the part accuracy of the machine tool can be increased, since the rigidity of the machine frame itself and its floor fastening have a considerable influence on the part accuracy.

[0066] Some advantageous embodiments of the device according to the invention have been described above. The invention is however not limited to the embodiments described above, but the inventive idea can be applied in numerous ways within the scope of the claims.