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
  • B23B29/03—Boring heads
  • B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
  • B23B29/03403—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing
  • B23B29/03407—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing by means of screws and nuts

Definitions

• Tools are already known for boring a hole in a part, these tools comprising a rotary support having a notch transverse to the axis of rotation of this support, two channels being engaged in this notch so as to be able to slide in diametrical directions relative to the rotary support, each slide being provided with a cutting edge, blocking means being provided to maintain these coul isseaux in the desired position.
• the notch of the rotary support is in the form of a dihedron whose faces have guide ridges extending parallel to the edge of the dihedron, so that the coul isseux cannot be moved in the direction of the axis of rotation of the support.
• the object of the present invention is to facilitate the obtaining of this result, by allowing an adjustment of the height of a slide, taken in the axial direction of the rotary support.
• the invention relates to a tool of the aforementioned kind in which the notch has two smooth and flat faces and opens on the head of the support to receive the coulisseaux, these two faces being obl ical to the axis of rotation of the support, means making it possible to move at least one of the slides by sliding it against a face of the notch to modify its position along the axis of the support.
• the accompanying drawing shows schematically and by way of example an embodiment of the tool, object of the invention.
• Figure 1 is a side view of the tool, showing the slides seen at the end and with partial cutaway.
• Figure 2 is a section along II— II-
• Figure 3 is a plan view of the tool, one of the sliders being removed.
• the tool comprises a rotary support I of generally circular cylindrical shape having a transverse notch whose cross section is W-shaped, as shown in FIG. 1.
• This notch is formed by two dihedral intersecting and whose faces 2 and 3 , respectively and 5 are smooth and oblique with respect to the axis of rotation of the support 1.
• the support 1 has at its base a threaded bore 22 for screwing this support on a spindle 6, intended to drive the tool in rotation.
• the notch in W is intended to receive two slides 7 and 8, each provided with a cutting edge, constituted by a plate 9 made of very hard metal.
• the base of the slides is in the form of a dihedron whose plane angle corresponds to that of the dihedrons of the notch and is equal to 90 °.
• the slide 7 has a rectilinear slot 10 whose plane is substantially parallel to the axis of rotation of the support, this slot giving passage to a screw 1 1 whose head cooperates with the slide 7 to hold it in the desired position.
• the screw is tightened in a bore threaded 12, sketched in FIG. 2, and the force exerted by this screw pushes the slide 7 downwards so that the two faces of its dihedron are firmly applied against the faces 2 and 3 of a dihedron of the notch.
• the slide 8 also has a slot 13 for a screw 14, intended to fix this slide in the dihedral 4, 5 of the notch.
• Figure 1 shows that the slot 13 has a portion 15 of greater width, in which the head of the screw 1 is embedded.
• the support 1 has two threaded bores 16 parallel, located in a plane parallel to the large face 4 of a dihedral of the notch.
• a screw 17 is engaged in each of these bores, these screws cooperating with the coul isseau 8 to allow the height to be adjusted above the notch by moving it along the large face 4 of the dihedral considered.
• each coulisseau has two threaded random strings 18 and 19, coaxial and parallel to a dihedral. These bores 18 and 19 open into the slot 10 and are each intended to receive a screw whose end opposite the head can abut against the fixing screw 14 to allow easy and precise adjustment of the position of the sliders in one direction. diameter of the rotary support 1.
• the support 1 still has two conduits - 20 and 21 emerging on the one hand inside the threaded bore 5 and on the other hand in the bottom of the notch in W, as can be seen in FIG. 3 for the conduit 20.
• These conduits are supplied with lubrication and cooling liquid from a central conduit provided in the spindle 6.
• a central conduit provided in the spindle 6.
• the height adjustment can be provided for the two slides 7 and 8, or only for one of them.
• the coolant coolant watering could be obtained by means of a single conduit projecting liquid into the machining area.
• the angle of the dihedrons 2, 3 and 4, 5 need not be 90 °, but this value allows easier production of the notch and the slides.
• the notch of the support 1 no longer needs to be W-shaped, but could have a shape any one, provided that it has two smooth and flat faces, arranged obl ically to the axis of rotation of the support.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4267764

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (1)

Citations (6)

• 1987
  • 1987-10-12 CH CH399187A patent/CH672605A5/fr not_active IP Right Cessation
• 1989
  • 1989-12-07 WO PCT/CH1989/000215 patent/WO1991008853A1/fr unknown

Patent Citations (6)

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