WO2001056728A1 - Outil d'usinage avec compensation d'usure actionnee selon l'axe de l'outil, et procedes d'utilisation - Google Patents
Outil d'usinage avec compensation d'usure actionnee selon l'axe de l'outil, et procedes d'utilisation Download PDFInfo
- Publication number
- WO2001056728A1 WO2001056728A1 PCT/FR2001/000096 FR0100096W WO0156728A1 WO 2001056728 A1 WO2001056728 A1 WO 2001056728A1 FR 0100096 W FR0100096 W FR 0100096W WO 0156728 A1 WO0156728 A1 WO 0156728A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- tool body
- tool
- machining
- mobile unit
- Prior art date
Links
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
- B23B29/03421—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing by pivoting the tool carriers or by elastic deformation
Definitions
- Machining tool with wear compensation actuated along the axis of the tool Machining tool with wear compensation actuated along the axis of the tool, and methods of use.
- the present invention relates to a precision machining tool (for example a boring or turning tool) provided with an automatic wear compensation device. It is recalled that the function of the compensation is to maintain the cutting edge of a cutting element (removable insert for example) in the optimal cutting position relative to the lean tool body the progressive wear of the edge, so not to have to replace the cutting element too often.
- a cutting element removable insert for example
- the machines to be machined were each designed for a particular application (reaming, whirling, surfacing, drilling, and so on). When such a ⁇ Hchine included a compensation mechanism, the latter could be integrated without too much difficulty into the machine spindle.
- the present invention solves this problem by means of a mechanism integrated in the machining tool along its axis, so as to be able to actuate the automatic compensation by means of the machine spindle itself, which, we repeat, is completely standard.
- the spindle motor being used both for machining and for compensation, this results in a very advantageous economy and simplicity of use compared to the prior art.
- the invention therefore provides a machining tool comprising a tool body on which at least one cartridge carrying a cutting element has been fixed, a screw extending along the axis of said tool body and comprising a head.
- the latter provides a manual wear compensation method as well as an automatic wear compensation method, following a machining phase, which use the machining tool according to
- Said manual wear compensation method comprises the following steps: a screwdriver is inserted into said front hole of the tool body so as to couple the blade of said screwdriver with said screw head, and the screw of the quantity required to offset each cutting element simultaneously by the quantity used to compensate for the wear of its cutting edge.
- Said automatic wear compensation method comprises the following steps: the machine spindle control leads the machining tool to a screwdriver fixed within the axes of the machine spindle, said front hole of the tool body is inserted on said screwdriver so as to couple the blade of the screwdriver with said screw head, and the machine spindle is rotated, by means of the spindle control, by the quantity required to simultaneously offset each cutting element by the quantity used to compensate for the wear of its cutting edge.
- FIG. 1 is a perspective view from above of a boring tool according to the invention, showing the cutting area
- Figure 2 is another perspective view from above of the boring tool shown in Figure 1, showing a window
- Figure 3a is a side elevation partially cut longitudinally of the same boring tool
- Figure 3b is an end view of the same boring tool.
- the figures show, by way of example, a boring tool (machining of cylinder block drums, finishing of rod ends or suspension pivots, and so on), but the invention applies equally well to other types of precision machining, such as turning (machining of crankshaft or engine camshaft, valve body flange, and so on).
- Said reaming tool consists of a tool body 2 on which a cartridge 17 has been fixed, for example by means of bolts 16.
- the cartridge 17 carries a removable plate 18 comprising a cutting spout 1.
- the body 2 is roughly cylindrical in shape, and has at its rear end 13 the projections and grooves suitable for fixing the tool on a standard machine spindle (not shown).
- the main part of the compensation mechanism according to the invention is located inside the tool along its axis, and opens at the front end 14 of the tool body 2 on a front orifice 15.
- This main part is constituted a screw 4, the head 9 of which is accessible from the front orifice 15, and a mobile unit 20 which can move along the threaded rod 10 of the screw 4.
- This mobile unit 20 consists for example of an internally threaded satellite roller nut 19, which is surrounded by a ring 11 and leaned against a nut 12.
- the screw head 9 is surrounded by a ring 5 mounted on the tool body 2.
- the screw 4 comprises, between the screw head 9 and the threaded rod 10, a middle part 8 partially threaded on which a nut 7 is screwed provided with a radial screw making it possible to block the nut 7 relative to the screw
- the assembly formed by the ring 5 and the nut 7 has the effect of preventing the axial translation of the screw 4 relative to the tool body 2, as clearly shown in FIG. 3a.
- a pin passing radially through the nut 7 and the middle part 8 and held in place by a rod instead of said radial screw and the mutually associated threads of the nut 7 and the middle part 8, it is obviously possible to use a pin passing radially through the nut 7 and the middle part 8 and held in place by a rod.
- the screw head 9 is provided with means (not shown) serving to brake the rotation of the screw head 9 relative to the ring 5; this means of friction in rotation of the screw 4 can for example consist of a ball housed in a peripheral groove 21 etched on the middle part 8, and pushed by a radial spring whose compression is preset.
- the compensation phases are distinct from the machining phases.
- the screw 4 is rotated relative to the tool body 2; as the screw 4 cannot move longitudinally, its rotation has the effect of causing the axial translation of the mobile unit 20 relative to the tool body 2.
- the ring 11 of the mobile unit 20 has a radial projection 6 , which is fitted into a sloping wedge 3 having roughly the shape of a strip extending on the internal longitudinal side of the cartridge 17, so that the longitudinal movement of the mobile unit 20 causes that of the sloping wedge 3.
- the latter has the effect of twisting the part of the cartridge 17 supporting the cutting element 18, including the cutting spout 1, this fact shifts, in the case of a boring tool, in a radial direction.
- the tests carried out on the mechanism according to the invention have shown that it is possible, by virtue of it, to control the movement of the cutting spout 1 with a step less than a micrometer.
- the degree of wear of the insert 18 is measured for a given machining job so as to be able to determine how much the cutting spout 1 must be offset, and therefore by what associated angle it is necessary turn the screw 4 relative to the tool body 2, during each compensation phase.
- a passive auxiliary element (not shown) which mainly consists of a screwdriver fixed within reach of the axes of the machine spindle, for example in horizontal position on a wall of a center of machining including the machine. This, under the action of a standard numerical control, leads the boring tool to the screwdriver and places the orifice 15 of the boring tool on the screwdriver so that the blade of the screwdriver engages on the screw head 9. All that remains is to rotate the machine spindle to obtain the desired rotation of screw 4.
- the transmission means it may be provided in the case of a machining tool provided with several cutting elements that the displacement of the mobile unit 20 causes the wear compensation of several of these elements at a time; it will also be easy, in this case, to provide that each cutting element will benefit from a different compensation value in relation to its wear speed (for example in the case where the machining tool both finishing pads and semi-finishing pads). Similarly, it will be appropriate for certain applications, to cause an axial displacement, or if necessary both axial and radial, of the cutting elements.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001231886A AU2001231886A1 (en) | 2000-02-03 | 2001-01-12 | Machining tool with wear compensation actuated along the tool axis and methods for using same |
EP01903932A EP1251989A1 (fr) | 2000-02-03 | 2001-01-12 | Outil d'usinage avec compensation d'usure actionnee selon l'axe de l'outil, et procedes d'utilisation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/01363 | 2000-02-03 | ||
FR0001363A FR2804624B1 (fr) | 2000-02-03 | 2000-02-03 | Outil d'usinage avec compensation d'usure actionnee selon l'axe de l'outil, et procedes d'utilisation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001056728A1 true WO2001056728A1 (fr) | 2001-08-09 |
Family
ID=8846619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/000096 WO2001056728A1 (fr) | 2000-02-03 | 2001-01-12 | Outil d'usinage avec compensation d'usure actionnee selon l'axe de l'outil, et procedes d'utilisation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1251989A1 (fr) |
AU (1) | AU2001231886A1 (fr) |
FR (1) | FR2804624B1 (fr) |
WO (1) | WO2001056728A1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1854675U (de) * | 1962-04-30 | 1962-07-05 | Robert Breuning | Bohrstange mit einstellbarem schneidstahl. |
US4507850A (en) * | 1983-12-19 | 1985-04-02 | Kearney & Trecker Corporation | Boring bar adjusting apparatus |
US4648757A (en) * | 1982-11-18 | 1987-03-10 | Amca International Corporation | Precision adjustment system for boring tools |
-
2000
- 2000-02-03 FR FR0001363A patent/FR2804624B1/fr not_active Expired - Fee Related
-
2001
- 2001-01-12 EP EP01903932A patent/EP1251989A1/fr not_active Withdrawn
- 2001-01-12 WO PCT/FR2001/000096 patent/WO2001056728A1/fr not_active Application Discontinuation
- 2001-01-12 AU AU2001231886A patent/AU2001231886A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1854675U (de) * | 1962-04-30 | 1962-07-05 | Robert Breuning | Bohrstange mit einstellbarem schneidstahl. |
US4648757A (en) * | 1982-11-18 | 1987-03-10 | Amca International Corporation | Precision adjustment system for boring tools |
US4507850A (en) * | 1983-12-19 | 1985-04-02 | Kearney & Trecker Corporation | Boring bar adjusting apparatus |
Also Published As
Publication number | Publication date |
---|---|
FR2804624A1 (fr) | 2001-08-10 |
FR2804624B1 (fr) | 2002-05-17 |
AU2001231886A1 (en) | 2001-08-14 |
EP1251989A1 (fr) | 2002-10-30 |
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