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KR-20260065809-A - Tool head and gear cutter for hard filling or hob filling

KR20260065809AKR 20260065809 AKR20260065809 AKR 20260065809AKR-20260065809-A

Abstract

A tool head for creating or machining a tooth profile, particularly an internal tooth profile, of a workpiece through the kinematics of hob peeling, wherein the tooth profile rotates about its own tooth profile rotation axis (C1), and a peeling tool (S) is held in the tool head and rotates about its own tool rotation axis by forming an axial intersection angle (X) between the tooth profile rotation axis (C1) and the tool rotation axis (S1), and the axial intersection angle (X) is not zero; the tool head has a tool holder (7b) defining the orientation of the tool rotation axis (S1) with respect to the tool head, and a shaft (6) mounted in the tool head to rotate about its own drive shaft rotation axis (B1) and rotatably driven to machine the tooth profile, and furthermore, the orientation (φ) of the tool rotation axis (S1) is at least 15° and no more than 85°, and the orientation is the orientation of the drive shaft rotation axis (B1) from an axial position oriented at an axial intersection angle (∑) with respect to the tooth profile rotation axis (C1). It is used to deflect and forms an angle with respect to a plane orthogonal to the drive shaft rotation axis (B1).

Inventors

  • 트로스 니코

Assignees

  • 글리슨 스위처랜드 아게

Dates

Publication Date
20260511
Application Date
20240904
Priority Date
20230904

Claims (16)

  1. A tool head (7) for creating or machining a tooth profile, particularly an internal tooth profile, of a workpiece (W) by the kinematics of hob peeling by a peeling tool (S), wherein the tooth profile rotates around its own tooth profile rotation axis (C1), and the peeling tool (S) is held in the tool head (7) and rotates around its own tool rotation axis by forming an axial intersection angle (Σ) between the tooth profile rotation axis (C2) and the tool rotation axis (S1), and the axial intersection angle (Σ) is not zero. The tool head (7) has a tool holder (7b) that defines the orientation of the tool rotation axis (S1) with respect to the tool head (7), and a shaft (6) that is mounted on the tool head (7) to rotate around its own drive shaft rotation axis (B1) and is driven to machine the tooth portion. The orientation (φ) of the tool rotation axis (S1) is at least 15° and no more than 85°, and the orientation is used to deflect the orientation of the drive shaft rotation axis (B1) from the axis position oriented at the axis intersection angle (∑) with respect to the tooth rotation axis (C1), and is characterized by forming an angle with respect to a plane orthogonal to the drive shaft rotation axis (B1), in a tool head (7).
  2. In claim 1, the tool holder is a tool head having a tool bearing for an axial portion of a tool shaft (4) that is rotatable about the tool rotation axis and non-rotatably connected to the filling tool.
  3. A tool head having a transmission device (5) that transmits the rotation of a rotary drive shaft to the tool shaft (4) in paragraph 2.
  4. A tool head having a tool clamping device for clamping the peeling tool to the tool shaft (4) for conjoint rotation in paragraph 2 or 3.
  5. In any one of claims 1 to 4, the tool holder (7b) is firmly connected to the bearing (7a) for the rotary drive shaft (6) in a machined state, and in particular, the tool head is detachably connected to the bearing (7a).
  6. A tool head having a centering mechanism for connecting the bearing (7a) for the rotary drive shaft and the drive side of the tool head in paragraph 5.
  7. In any one of claims 1 to 6, the tool head is driven directly by a drive unit installed in the tool head, wherein the rotary drive shaft (6) is driven directly by the drive unit installed in the tool head.
  8. A tool head that is pivotably mounted about a pivot axis (A1) with respect to the carrier of a gear cutter in any one of claims 1 to 7.
  9. In claim 8, the main directional component of the drive shaft rotation axis is a tool head that extends orthogonally to the pivot axis (A1).
  10. In claim 8 or 9, the main directional component of the tool rotation axis is a tool head that is orthogonal to the pivot axis (A1).
  11. A tool head according to any one of claims 1 to 10, wherein the drive shaft rotation axis and the tool rotation axis extend in planes parallel to each other, particularly in the same plane.
  12. In any one of claims 3 to 11, the transmission device (5) is a tool head having a homokinetic joint or gearing.
  13. A tool head according to any one of claims 1 to 12, wherein the ratio of the length of the tool shaft (4) to the diameter of the tool shaft extending in the direction of the tool rotation axis is 0.4 or more, preferably 0.6 or more, particularly 0.8 or more, and such ratio is preferably 5 or less, particularly 4 or less.
  14. A tool head according to any one of claims 1 to 13, wherein the ratio of the diameter of the tool shaft to the diameter of the (filling) tool is 0.17 or more, preferably 0.24 or more, particularly 0.3 or more and/or 0.75 or less, preferably 0.67 or less, particularly 0.6 or less.
  15. A gear cutter (100) for hob filling or hard filling of a tooth portion, the gear cutter (100) having a workpiece spindle drive for driving a workpiece, particularly an internal tooth portion (W), and a tool head (7) according to any one of claims 1 to 14.
  16. A method of hard filling or hob filling of a workpiece (W), particularly an internal toothed workpiece, using a tool head (7) according to any one of claims 1 to 15, wherein the product of the length of the tool shaft, including the axial width of the filling wheel, and the sine value of the axial intersection angle is smaller than a predetermined maximum value.

Description

Tool head and gear cutter for hard filling or hob filling The present invention relates to a tool head for creating or machining a tooth profile, particularly an internal tooth profile, of a workpiece by the kinematics of hob peeling by a peeling tool, as well as a gear cutting machine for hob peeling or hard peeling of the tooth profile, wherein the tooth profile rotates about its own tooth profile rotation axis, and the peeling tool is held in the tool head and rotates about its own tool rotation axis by forming an axial intersection angle (Σ) between the tooth profile rotation axis and the tool rotation axis, and the axial intersection angle (Σ) is not zero. Such tool heads for hob filling are well known in the prior art and are described, for example, in DE 10 2017 011 978 A1. They are generally rotatable or pivotable on the carriage assembly of a hob filling machine, so that the axial intersection angle can be adjusted by adjusting the rotation angle of these rotatable holders with respect to the axial intersection angle (Σ) between the tooth rotation axis and the tool rotation axis. A typical axial intersection angle adjustment for hob filling is, for example, 20°. Figure 1 schematically illustrates a gear cutter having a machine axis. Figure 2 illustrates a representation of the area of a tool head compared to a conventional tool head as in Figure 1, along with the relative position to the internal tooth section. Figures 3 and 4 illustrate a comparative situation regarding conventional hob filling. Figure 5 illustrates machining with an axis intersection angle different from that of Figure 2. The machine tool illustrated in FIG. 1 is a machine (100) designed to hob fill with a filling wheel (S). On the workpiece side, the machine (100) has a tool table (80), the tool table is mounted on a machine bed (90) in a rotary drive manner, and a workpiece to be machined (not illustrated in FIG. 1), having an internal tooth section to be machined, for example, can be clamped so as to be rotatable about a machine rotation axis (C1) on the workpiece side. In terms of the tool, the machine (100) has a linear machine axis (X1) for radial positioning movement of the tool relative to the workpiece, an axis (Z1) for movement of the tool along the axial direction of the table axis (C1), and an axis (Y1) for tangential relative movement between the tool and the workpiece. These linear axes (X1, Z1) are perpendicular to each other and are implemented through a carriage arrangement (70) in which a linear carriage (72) for X1 movement carries a vertical carriage (74) for Z1 movement. In this embodiment, a tool head (78) carrying the tool (S), which also has a CNC drive unit as a direct drive unit for tool rotation having a rotation axis (B1), can be moved via a linear carriage (76) for tangential movement (Y1). However, the tangential carriage (76) is rotatably arranged on a vertical carriage (74) having a pivot axis (A1), so that the carriage movement is horizontal only in the position shown in FIG. 1, otherwise it is inclined with respect to the Z1 axis by a set pivot angle (A1). As explained above, the gear cutter of FIG. 1 is a vertical machine (vertical workpiece rotation axis) known from the prior art. The present invention relates to a variation of a tool head (78); the basic structure and machine axes (C1, X1, Y1, Z1, A1) can be readily used in an embodiment for a design according to the present invention; the present invention is not limited to a vertical machine or a specific machine axis arrangement in relation to the basic design, and can be designed, for example, as a horizontal machine, and also with a smaller number of machine axes. A tool head (78') according to the present invention has the newly assigned reference number 7 and is described below: The tool head (7) is illustrated in FIG. 2 with an internal toothed workpiece (W). It is evident that the tool head (7) is designed to be angled, and the second part (7b) adjacent to the filling wheel (S) forms a tool holder that defines the orientation of the tool rotation axis (S1) relative to the tool head (7), and the first part (7a) adjacent thereto forms a bearing for the motor and rotary drive shaft (6). As is common in hob filling machines, this can be formed by a tool spindle drive (direct drive). The second part (7b) is flanged to the first part (7a) and can be replaced with another, particularly different second part (not shown). FIG. 2 shows that an angle (φ) of 70° is set between a plane orthogonal to the tool rotation axis (S1) (corresponding to the orientation of the tool shaft (4)) and the drive shaft rotation axis (B1) (oriented according to the rotational drive shaft (6)). The orientation of the rotational drive shaft (6) with respect to the workpiece rotation axis (C1) is the same as in FIG. 1, so that machining of the tooth profile can be performed under an axis intersection angle (Σ) of 20°. Since the orientational bias overhang with respect