Search

EP-4741097-A1 - MACHINE TOOL FOR MANUFACTURING FLAT INSTRUMENTS AND/OR TOOLS FOR MEDICAL TECHNOLOGY AND METHOD FOR MANUFACTURING FLAT INSTRUMENTS AND/OR TOOLS FOR MEDICAL TECHNOLOGY WITH SUCH A MACHINE TOOL

EP4741097A1EP 4741097 A1EP4741097 A1EP 4741097A1EP-4741097-A1

Abstract

The invention relates to a machine tool (2) for the manufacture of flat instruments and/or tools for medical technology, comprising a machine frame (4), at least one working spindle (6) rotatably mounted about a spindle axis (8), at least one workpiece table (10) attributable to or associated with the at least one working spindle (6), which is rotatably or pivotably mounted on the machine frame (4) about a table axis (12), and at least one workpiece holder (14) fixed to the workpiece table (10), which has at least one first workpiece holder (16) on which a flat workpiece (17) can be fixed for machining a flat side, and at least one second workpiece holder (18) extending transversely or obliquely to the first workpiece holder (16) and on which a flat workpiece (17) can be fixed for machining an end face, wherein at least one of the at least one workpiece table (10) is in a first working position in which the first workpiece holder (16) is at least one of the at least one The work spindle (6) is accessible for machining and can be transferred to a second working position by rotating or swiveling about the table axis (12) assigned to it, in which the second workpiece holder (18) is accessible to at least one of the work spindles (6) for machining.

Inventors

  • VIDOVIC, DAMIR
  • DREHER, MATTHIAS

Assignees

  • Schwäbische Werkzeugmaschinen GmbH

Dates

Publication Date
20260513
Application Date
20241108

Claims (15)

  1. Machine tool (2) for the manufacture of flat instruments and/or tools for medical technology, comprising a machine frame (4), at least one work spindle (6) rotatably mounted about a spindle axis (8), at least one workpiece table (10) attributable to or associated with the at least one work spindle (6), which is rotatably or pivotably mounted on the machine frame (4) about a table axis (12), and at least one workpiece holder (14) fixed to the workpiece table (10), which has at least one first workpiece holder (16) on which a flat workpiece (17) can be fixed for machining a flat side, and which has at least one second workpiece holder (18) extending transversely or obliquely to the first workpiece holder (16) and on which a flat workpiece (17) can be fixed for machining an end face, wherein at least one of the at least one workpiece table (10) is in a first working position in which the first workpiece holder (16) is located at least one of the at least one work spindle. (6) is accessible for machining, can be transferred to a second working position by rotating or swiveling about the table axis (12) assigned to it, in which the second workpiece holder (18) of at least one of the at least one working spindle (6) is accessible for machining.
  2. Machine tool (2) according to claim 1, characterized in that at least one of the at least one workpiece table (10) comprises a holding surface (20) on which at least one of the at least one workpiece holder (14) is arranged, and which in the first working position is arranged transversely or obliquely to the spindle axis (8) of the work spindle (6) associated with the workpiece table (10) and which in the second working position is arranged transversely or obliquely to the spindle axis (8) of the work spindle (6) associated with the workpiece table (10).
  3. Machine tool (2) according to claim 2, characterized in that the first workpiece holder (16) of the workpiece holder (14) runs parallel or at an angle to the holding surface (20) of the workpiece table (10) and that the first workpiece holder (16) that the flat workpiece (17) fixed to the first workpiece holder (16) can be machined by the work spindle (6) on its flat side running parallel or at an angle to the holding surface (20) and/or that the second workpiece holder (18) of the workpiece holder (14) runs transversely or at an angle to the holding surface (20) of the workpiece table (10) and that the flat workpiece (17) fixed to the second workpiece holder (18) can be machined by the work spindle (6) on its end face of the workpiece (17) running transversely or at an angle to the holding surface (20).
  4. Machine tool (2) according to claim 2 or 3, characterized in that the first workpiece holder (16) is arranged on a head surface of the workpiece holder (14) which runs parallel or at an angle to the holding surface (20) and is spaced apart from the holding surface (20) and that at least one of the at least one second workpiece holder (18) is arranged on a side surface arranged between the holding surface (20) and the head surface and which runs transversely or at an angle to the holding surface (20).
  5. Machine tool (2) according to one of the preceding claims, characterized in that at least one of the at least one workpiece holder (14) has at least two second workpiece receptacles (18) which each extend transversely or obliquely to the first workpiece receptacle (16) and that the workpiece holder (14) comprises at least one workpiece holder drive by which the workpiece holder (14) can be moved at least in the second working position of the workpiece table (10) relative to the workpiece table (10) from a first machining position in which a first second workpiece receptacle (18) of the work spindle (6) is accessible to at least one further machining position in which a further second workpiece receptacle (18) of the work spindle (6) is accessible.
  6. Machine tool (2) according to one of the preceding claims, characterized in that at least one of the at least one workpiece holder (14) is rotatably fixed on the holding surface (20) of the workpiece table (10) about a workpiece holder rotation axis (22) extending transversely to the holding surface (20) of the workpiece table (10).
  7. Machine tool (2) according to claim 6, characterized in that the transfer from the first machining position to the second machining position by the workpiece holder drive comprises a rotation or pivoting of the workpiece holder (14) about the workpiece holder rotation axis (22).
  8. Machine tool (2) according to one of the preceding claims, characterized in that at least one of the at least one first workpiece holder (16) secures a flat workpiece (17) fixed to it for rough and semi-fine machining (OP 10) by the at least one working spindle (6) and/or that at least one of the at least one second workpiece holder (18) secures a flat workpiece (17) fixed to it for fine machining (OP 20) by the at least one working spindle (6).
  9. Machine tool (2) according to one of the preceding claims, characterized in that at least two workpiece holders (14) are arranged on a workpiece table (10), which are spaced apart from each other on the same holding surface (20), and in particular that the at least one working spindle (6) comprises at least one first working spindle (6) which is assigned to a first workpiece holder (14) of the at least two workpiece holders (14), and at least one further working spindle (6) which is assigned to a further workpiece holder (14) of the at least two workpiece holders (14).
  10. Machine tool (2) according to one of the preceding claims, characterized in that the at least one workpiece table (10) comprises at least two workpiece tables (10), wherein a first workpiece table (10) is rotatable or pivotable about a first table axis (12), wherein a second workpiece table (10) is rotatable or pivotable about a second table axis (12) without contact with the first workpiece table (10), and wherein the first table axis (12) and the second table axis (12) are parallel to each other.
  11. Machine tool (2) according to one of the preceding claims, characterized in that the at least one workpiece table (10) is mounted on a swivel carrier (24) so as to be rotatable or pivotable, wherein the swivel carrier (24) is mounted on the machine frame (4) so as to be rotatable or pivotable about a pivot axis (26) and can be moved from a first pivot position, in which at least one of the at least one workpiece table (10) can be arranged in a working area (28) facing the at least one working spindle (6), to a second pivot position, in which the workpiece table (10) is arranged in a loading and unloading area (30).
  12. Machine tool (2) according to claim 11, characterized in that the at least two workpiece tables (10) are arranged on opposite sides of the swivel carrier (24), wherein at least one first workpiece table (10) is arranged in the first pivot position of the swivel carrier (24) in the working area (28) and at least one second workpiece table (10) is arranged in the first pivot position of the swivel carrier (24) in the loading and unloading area (30) and wherein the at least one first workpiece table (10) is arranged in the second pivot position of the swivel carrier (24) in the loading and unloading area (30) and the at least one second workpiece table (10) is arranged in the second pivot position of the swivel carrier (24) in the working area (28).
  13. Machine tool (2) according to one of the preceding claims, characterized in that the pivoting carrier axis, which is at least one first table axis (12) and/or at least one second table axis (12), runs parallel to a horizontally extending X-axis, and in particular runs parallel to each other, or that the pivoting carrier axis, which is at least one first table axis (12) and/or at least one second table axis (12), runs parallel to a vertically extending Y-axis, and in particular runs parallel to each other.
  14. Machine tool (2) according to one of claims 9 to 13, characterized in that the first working spindle (6) and the at least one The first work spindle (6) and the at least one further work spindle (6) are arranged horizontally next to each other if the at least one table axis (12), in particular the first table axis (12), runs parallel to the horizontally running X-axis, and the first work spindle (6) and the at least one further work spindle (6) are arranged vertically one above the other if the at least one table axis (12), in particular the first table axis (12), runs parallel to the vertically running Y-axis.
  15. Method for manufacturing flat instruments and/or tools for medical technology using a machine tool (2) according to any one of claims 1 to 14, comprising the steps: a. 100: Fixing a flat workpiece (17) to the at least one first workpiece holder (16); b. 101: Positioning at least one workpiece (17) already machined at the first workpiece holder (16) at one of the at least one second workpiece holder (18); c. 102: Transferring the workpiece table (10) into the first working position in which the first workpiece fixture (16) of the at least one working spindle (6) is accessible for machining, and machining the workpiece (17) fixed at the first workpiece fixture (10) by the working spindle (6); d. 103: Transferring the workpiece table (10) into the second working position in which the second workpiece holder (18) of the at least one working spindle (6) is accessible for machining, and machining the workpiece (17) fixed on the second workpiece holder (18) by the working spindle (6); e. 104: If necessary, transfer the workpiece holder (14) from the first machining position to another machining position; f. 105: Removing the at least one workpiece (17) processed at the second workpiece holder (18) and removing the at least one workpiece (17) processed at the first workpiece holder (16).

Description

The invention relates to a machine tool for the manufacture of flat instruments and/or tools for medical technology and methods for manufacturing flat instruments and/or tools for medical technology using such a machine tool. It is known from the prior art to machine flat instruments and/or tools made from forged parts, so-called hammered parts, in a "flying" or "standing" manner. The manufacturing process for hammered parts comprises many individual and manual machining steps, which, following machine machining, may include, for example, manual belt sanding. During "standing" or "flying" machining, the parts are often subject to very high vibrations. These manufacturing-related vibrations can reduce the quality of the finished instruments and/or tools, or necessitate time-consuming and costly reworking of the individual instruments and/or tools. Furthermore, the constant re-clamping of the individual workpieces for the production of the flat instruments and/or tools proves to be very time-consuming and also reduces quality. One object of an embodiment of the invention is to propose a machine tool for the manufacture of flat instruments and/or tools in which the manufacturing time and product quality of the flat instruments and/or tools are reduced or improved. This problem is solved by a machine tool for the manufacture of flat instruments and/or tools, comprising a machine frame, at least one work spindle rotatably mounted about a spindle axis, at least one workpiece table assignable to or associated with the at least one work spindle, which is mounted directly or indirectly on the machine frame so as to be rotatable or pivotable about a table axis, and at least one workpiece holder fixed to the workpiece table, which has at least one first workpiece holder on which a flat workpiece can be fixed for machining a flat side, and at least one second workpiece holder which extends transversely or obliquely to the first workpiece holder and on which a flat workpiece can be fixed for machining an end face, wherein at least one of the at least one workpiece table can be moved from a first working position, in which the first workpiece holder is accessible to at least one of the at least one work spindle for machining, to a second working position, in which the second workpiece holder is accessible to at least one of the at least one work spindle for machining, by rotating or pivoting about the table axis assigned to it. Because the machine tool includes a workpiece holder with a first workpiece clamping and a second workpiece clamping, a flat instrument and/or tool can be manufactured from a flat workpiece, requiring a maximum of two clamping operations. Because a flat workpiece can be securely clamped to the first workpiece holder for machining one flat side, the use of impact workpieces can be avoided, and the flat instrument and/or tool to be manufactured can be milled from a solid piece of material. Securing the workpiece across its entire surface in the first workpiece holder significantly reduces the risk of vibrations from the spindle during machining. Because the flat workpiece can be fixed in the second workpiece holder for machining an end face or can be clamped in clamping jaws, working areas of the flat instruments and/or tools can be machined out of the flat workpiece. The flat workpieces that can be fixed to the second workpiece holder can include workpieces that were previously fixed to the first workpiece holder and through which at least one drive spindle was machined. Because the workpiece table can be moved from a first working position to the second working position and back, the first workpiece holder and the second workpiece holder of the workpiece holder can be machined by one and the same working spindle. The at least one workpiece table can, in principle, be designed in any way, provided it fulfills the technical function of securing the workpiece holder. It proves advantageous if at least one of the at least one workpiece table comprises a holding surface on which at least one of the at least one workpiece holder is arranged, and which, in the first working position, is arranged transversely or obliquely to the spindle axis of the work spindle assigned to the workpiece table, and which, in the second working position, is arranged transversely or obliquely to the spindle axis of the work spindle assigned to the workpiece table. In a further development of the latter embodiment, it is provided that the first workpiece holder of the workpiece holder runs parallel or at an angle to the holding surface of the workpiece table and that the flat workpiece fixed to the first workpiece holder can be machined by the work spindle on its flat side running parallel or at an angle to the holding surface and/or that the second workpiece holder of the workpiece holder runs transversely or at an angle to the holding surface of the workpiece table and that the flat workpiece fixed to the second workpiece h