Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
  • B23B29/24—Tool holders for a plurality of cutting tools, e.g. turrets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
  • B23B29/24—Tool holders for a plurality of cutting tools, e.g. turrets
  • B23B29/242—Turrets, without description of the angular positioning device
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C3/00—Milling particular work; Special milling operations; Machines therefor
  • B23C3/28—Grooving workpieces
  • B23C3/34—Milling grooves of other forms, e.g. circumferential
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C5/00—Milling-cutters

Definitions

• the invention relates to a method and a tool holder for turning internal contours on workpieces.
• the state of the art includes tool turrets that are equipped with tools. These tools have each been developed for a predetermined machining process, so that until now a tool with a tool holder that has been specially matched to this has had to be used for each machining process of a specific workpiece geometry. For this purpose, the machine tool must be moved to a reference position that is outside the collision area with the workpiece when the tool is changed. The tool turret is aligned with the desired tool so that it can then be brought into engagement for machining.
• the invention has for its object to provide a method and a tool holder for turning internal contours on workpieces, in which the time required for moving to the reference position for changing tools and moving the workpiece into and out of this same reference position is eliminated, so that machining with short cycle times in which several tools have to be engaged according to the machining sequence can be carried out economically.
• This object is achieved with a method with the features of claim 1 and with the features of on and with a tool holder according to claim 2.
• the subclaims which refer back to this advantageously design the tool holder according to claim 2.
• the tool holder according to the invention enables the use of several different tools for different machining tasks.
• the tool change takes place, for example within a central bore of a workpiece, without the machine tool having to assume a reference position for the purpose of tool change.
• the so-called In addition times for the retraction of the tools omitted in the tool change position, for example by the Vertakten of the turret, and the starting of the W ⁇ erk Cultures with the other tool. This significantly reduces the machining times per workpiece. The processing itself is faster and cheaper.
• Fig. 1 shows a schematic view of the tool holder with chuck and tool turret.
• Fig. 2 shows a section A-A through the clamped workpiece in a front view of the tool holder equipped with tools.
• FIG. 3 shows a plan view of a tool holder according to the invention.
• FIG. 4 shows an enlarged section (detail X) of the tool holder according to FIG. 3.
• FIG. 1 and 2 show a workpiece 3 to be machined, which is machined on the inner contour. Different tools are used for the same workpiece 3.
• the workpiece 3 to be machined is clamped in a chuck 1 with clamping jaws 2 attached.
• the chuck 1 is attached to a workpiece spindle, not shown, which is received in a workpiece headstock.
• the axis of rotation of the workpiece spindle is aligned with the longitudinal axis of the chuck 1 and the longitudinal axis of the workpiece 3.
• the workpiece spindle is driven by a motor and transmits the rotational movement to the chuck 1 as shown by arrow 4.
• the inner contours 3A, 3B and 3C are to be produced by machining.
• an internal turning tool is required to machine the contour 3A, a facing tool to machine the contour 3C and a plunge turning mechanism to machine the contour 3B.
• the tool holder 5 has a circular end face 5 ', in which several different machining tools are arranged, which are equipped with different cutting geometries.
• the Different designed processing tools 6, 7 or 8 are used.
• the radial contacting on the different processing tools 6, 7 and 8 is indicated by arrow 9.
• the tool holder 5 is received in a tool holder plate 11 of a turret 10 of a machining machine, such as a lathe.
• the turret 10 is fastened on a guide housing, not shown, which is built on a guide system which can be moved by the CNC axes in the two axes X and Z, which are preferably at right angles to one another.
• the inner contour 3A of the bore of the workpiece 3 is machined with the machining tool 6, for example.
• the flat surface 3C is machined with the machining tool 7, for example.
• the tool 6 is moved free in the X-axis direction.
• the machining tool 7 is brought into the position for the plunge machining 3B by contacting the tool holder 5, then moved back again and the machining tool 8 is used by correspondingly interlocking by means of the turret 10.
• FIG. 2 shows a front view of the tool holder 5, in which, for example, the machining tool 6 is positioned on the tool holder 5 in the machining position.
• the receptacle 5 shows, for example, the number of tools 6, 7 and 8, which is determined by the workpiece geometry to be produced. When assembling the receptacle 5, care must be taken that adjacent machining tools do not collide during the machining of the inner contour of the workpiece (see FIG. 2, position 20).
• FIG. 3 shows a tool holder 5, which is preferably equipped with screw-in or insertable inserts 30. In these inserts 30, the cutting tools 6, 7, 8, etc. are each inserted with the shank. The inserts 30 are arranged close to the outer circumference of the tool holder 5. According to FIG.
• cutting inserts with clamping screws are fastened to the insert 30 as tools, which is fixed to the tool holder 5 by means of a screw 31.
• the tool holder has prism-shaped grooves 32 in the peripheral region, into which the cylindrical inserts or holders 30 can be clamped (see FIG. 4). Because of their cylindrical shape, the tool holders are simple and inexpensive to manufacture in series.
• the tool holder 5 can be equipped with several identical or different machining tools, but with at least two machining tools.
• the number of machining tools depends on the geometry of the workpiece 3 to be produced and can consequently vary, so that a specific tool set can be attached to a tool holder 5 which can be assigned to the workpiece.
• Several differently equipped tool holders 5 enable rapid machining of different workpiece geometries with extremely short changeover times.
• Fully equipped tool holders 5 enable repeated use without additional adjustment work.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)
• Turning (AREA)
• Gripping On Spindles (AREA)
• Milling Processes (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7891159

Family Applications (1)

Country Status (10)

Cited By (1)

Families Citing this family (8)

Citations (4)

Family Cites Families (2)

• 1998
  • 1998-12-15 DE DE19857841A patent/DE19857841A1/de not_active Ceased
• 1999
  • 1999-12-10 EP EP99959404A patent/EP1140406A1/de not_active Withdrawn
  • 1999-12-10 AU AU16583/00A patent/AU1658300A/en not_active Abandoned
  • 1999-12-10 BR BR9916194-0A patent/BR9916194A/pt not_active IP Right Cessation
  • 1999-12-10 CN CN99814434A patent/CN1330578A/zh active Pending
  • 1999-12-10 CZ CZ20012137A patent/CZ20012137A3/cs unknown
  • 1999-12-10 KR KR1020017007036A patent/KR20020020671A/ko not_active Application Discontinuation
  • 1999-12-10 WO PCT/EP1999/009788 patent/WO2000035618A1/de not_active Application Discontinuation
  • 1999-12-10 JP JP2000587917A patent/JP2002532264A/ja active Pending
  • 1999-12-10 CA CA002352892A patent/CA2352892A1/en not_active Abandoned

Patent Citations (4)

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