EP0925161A1 - Flat-surface milling machine - Google Patents
Flat-surface milling machineInfo
- Publication number
- EP0925161A1 EP0925161A1 EP98936217A EP98936217A EP0925161A1 EP 0925161 A1 EP0925161 A1 EP 0925161A1 EP 98936217 A EP98936217 A EP 98936217A EP 98936217 A EP98936217 A EP 98936217A EP 0925161 A1 EP0925161 A1 EP 0925161A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting edge
- face
- milling head
- milling
- milling machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
- B27C1/005—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor with tools having a rotational vector which is perpendicular to the working surface
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/306216—Randomly manipulated, work supported, or work following device
- Y10T409/306552—Randomly manipulated
- Y10T409/306608—End mill [e.g., router, etc.]
Definitions
- the invention relates to a face milling machine according to the preamble of claim 1.
- page 762 refers to an honor saw K34G / 1200, which is equipped with special cutters that saw and plan the wood at the same time.
- These cutters have two types of teeth, reamer teeth and planer teeth.
- the actual cutting work is performed only with one main cutting edge, the reamer teeth, which are arranged radially on the outermost circumference of the cutting cutter. Every two reamer teeth are followed by a planing tooth, which uses an axial cutting edge to treat the previously cleared, roughly sawn rough cut surface.
- the cut surfaces of the sawn parts are very smooth in some areas, but due to the process, minimal but clearly visible ring-like depressions occur. This enables further post-treatment, e.g. Planing, before painting or impregnating, can not be omitted in all cases.
- a hand milling machine according to DE-A-195 43 992 is also known, with which thin wood-based material layers, in particular te layers of paint can be removed.
- the surface quality that can be achieved with this is relatively coarse, so that it cannot be done without machining after-treatment such as grinding or the like. can be painted or impregnated.
- the known machine thus provides a face mill with a conventional one
- the known stationary end face milling machines result in less good surface quality when planing end grain and when the planing teeth emerge from the workpiece, because this results in a relatively coarse edge tearing pattern.
- the end face milling machine according to the invention with the characterizing features of claim 1 has the advantage that all surfaces, including end wood surfaces and edges, can be machined with high quality achieved with no type of planing and milling machines.
- the face milling machine according to the invention also has the advantage that it can be used as a hand tool for finishing wooden workpieces that are too large and too heavy for machining on stationary machines. So the new face milling machine can also be used advantageously for finishing finished wooden panels, wooden floors or restoring furniture, whereby chips are mainly formed without dust content i.e. without producing fine dust that is difficult to filter and harmful to health.
- a second knife can be arranged with only one effective main cutting edge means that rough-cutting pre-cutting with the second knife with a chip thickness of approx. 3 mm and re-cutting with the first knife with a chip thickness of approx. 0.3 mm with a very high removal rate - possible and with a high surface quality.
- minor cutting edge has a predominantly clothoid-shaped area which is intended to penetrate the workpiece to be machined and which tangentially merges into a non-chloroid-shaped area which should not penetrate the workpiece in a cutting manner results in particularly clean ones , smooth cut surfaces.
- the knives are flat, flat bodies, which can be arranged with their narrow sides facing the workpiece on the milling head projecting beyond the end face thereof, makes the manufacture of the knives and the milling head independently of one another particularly economically favorable.
- the secondary cutting edge has a clearance angle of between 10 ° and 20 ° ensures clean chip removal, with large chips being created without dust.
- the main cutting edge engages radially about 0.5 to 5 mm further outside in a workpiece surface than the secondary cutting edge, particularly effective pre-cutting with the main cutting edge or high-quality re-cutting with the secondary cutting edge is possible.
- the milling head of the face milling machine according to the invention is operated at a speed of approximately 10,000 rpm, with at least one of the knives defining a flight circle with a diameter of 80 mm, enables a best value to be achieved between the cutting speed and the surface quality.
- the fact that the milling head works with a knife that only has a single effective secondary cutting edge and has an exceptionally clean cutting quality means that milling can be carried out without machining, the milling head being particularly economical to produce.
- FIG. 1 shows a spatial view of an exemplary embodiment of the stimulation milling machine according to the invention
- FIG. 2 shows a partial longitudinal section of the stimulation milling machine according to FIG. 1 in the area of the base plate
- FIG. 3 shows a bottom view of the base plate
- FIG. 4 shows the end face of a milling head with two identical knives
- FIG. 5 shows the end face of a further milling head with two different knives
- FIG. 6 shows a partial spatial view of a milling head
- FIG. 7 shows a knife with a cloth-shaped secondary cutting edge of the milling head according to FIG. 2.
- the face milling machine 10 shown spatially in FIG. 1 has an approximately cylindrical, axially Direction from top to bottom extending housing 12. This carries a power cord 16 emerging at the top and two laterally, radially projecting handles 14, only one of which is shown, for guiding the face milling machine 10 on a workpiece, not shown.
- the lower region of the housing 12 is connected to a base plate 18 for support on a workpiece, which consists of a front, axially adjustable, wide 20 and a rear, fixed, narrow part 22.
- the base plate 18 is provided in the axial extension of the housing 12 with a circular passage opening 24 for the passage of a disk-like milling head 26 for machining engagement in the workpiece, not shown.
- the passage opening 24 is arranged between the parts 20, 22 of the base plate 18, a relatively small area of this opening 24 - to the left in the viewing direction - from the edge of the narrower, fixed part 22 and a larger area from the edge of the wider, movable one Part 20 is formed, wherein the movable part 20 partially encompasses the outer contour of the fixed part 22.
- the movable part 20 of the base plate 18 is adjustable along the axis of the cylindrical housing 12 relative to the housing 12 or relative to the milling head 26, the cutting edges of which are approximately flush with the lower surface of the fixed part 22.
- the adjustment path of the movable part 20 relative to the fixed part 22 determines the chip thickness during face milling.
- the movable part 20 of the base plate 18 is wider and the fixed part 22 narrower than that
- Diameter or the flight circle 52 of the disk-shaped milling head 26 (FIG. 3).
- FIG. 2 shows a longitudinal section of the face milling machine 10 in the area of the base plate 18 on a workpiece 51. seated, with the fixed part 22 in the viewing direction at the bottom left and the adjustable part 20 in the viewing direction on the right. Between the fixed and the adjustable part 20, 22, the passage opening 24 can be seen, which tightly encompasses the circumference of the milling head 26 shown in dash-dot lines at the free end of the work spindle 13, with the drawing only indicating that the work spindle 13 with the milling tool held thereon at right angles Head 26 is slightly inclined towards the sole 22 'of the fixed part 22 of the base plate 18.
- the lower edge of the milling head 26 runs on the side of the milling head 26 facing away from the feed direction within the sole 22' of the fixed part 22, so that the cutting edges of the milling head 26 have a lower depth of cut compared to the workpiece to be machined in the rear than in the front.
- the cutting edges of the milling head 26 emerge only gradually or gently from the area of the workpiece previously machined by the front area of the milling head 26. This prevents chips from being pulled out with a corresponding reduction in machining quality.
- the adjustable part 20 of the base plate 18 carries a guide pin 58 which engages in a guide bore 60 of a spaced-apart area of the base plate 18 and ensures that it is supported without play.
- a spindle-like threaded bolt 62 is anchored in the part 20, which passes through the spaced upper region 18 'of the base plate 18 and is gripped at its free end by an adjusting nut 64 which is connected to an adjusting handle 66 in a rotational test.
- the adjustable part 20 is upward or downward in relation to the upper region of the base plate 18 shifted down parallel.
- the adjustable part 20 of the base plate 18 releases the region of the milling head 26 lying in the feed direction for machining engagement in a workpiece 51.
- Figure 3 shows a view from below of the base plate 18 with the adjustable and the fixed part 20, 22. It can be seen that the passage opening 24 is mainly formed by a curved recess in the adjustable part 22, while the small area of the passage opening by a Partially circular curvature is formed in the fixed part 20.
- the face milling machine 10 To work with the face milling machine 10, it is placed on the workpiece 51 with the adjustable part 20 of the base plate 18.
- the adjustable part 20 is axially set back relative to the milling head 26 to such an extent that a chip thickness of 0.1 to 0.5 mm can be achieved and it rests securely.
- the energy supply to the motor is switched on, so that the latter rotates the milling head 26.
- the stimulation milling machine 10 is advanced to the right in the viewing direction, the milling head 26 engages in the workpiece (not shown). If the milling head 36 has exceeded the workpiece in full width, the rear, fixed area of the base plate comes to rest on the area of the workpiece that has just been machined. Now a particularly stable support of the base plate 18 on the workpiece and uniform, safe face milling are guaranteed.
- FIG. 4 shows a top view of the end face 128 of a further exemplary embodiment of the circular disk-shaped milling head 126 with two radial corner recesses 130, each with a support surface 132 and two threaded bores 134 for take one clamping screw 136 each to fasten two identical flat knives 138.
- the knives 138 support themselves with their knife chest on the support surfaces 132.
- An arrow 142 shows the direction of rotation of the milling head 126, which is fastened to the work spindle 13 of the milling machine 10 with a central retaining screw 144 is (Fig. 1).
- the radial support surfaces 132 are each formed as axial, radially tapering recesses 146 on the end face 128, which promote chip removal when using the milling head 126.
- the knives 138 only carry a secondary cutting edge 148 which is only in the axial direction, i.e. protruding from the plane of the drawing, effective and not in the radial direction.
- the radial outer edge of the knife 138 determines the course of the flight circle 152, which is only geometrically present and is not effective in terms of cutting technology.
- the intersection between a radial and the center of the knife 138 or the center of the secondary cutting edge 148 determines the radially inner working group 154.
- the working group 154 describes this Center of an annular area on which the secondary cutting edge 148 effects a pulling cut with the highest surface quality.
- FIG. 5 shows a further exemplary embodiment of a milling head 26 which carries two different knives 38, 40 in a radial recess 30 'each.
- the difference between the first knife 38 and the second knife 40 and their different tasks become clear when considering the angle of inclination with respect to a radial which runs in the end face 28 or the flight circle plane.
- In the center on the end face 28 of the milling head 26 is an xyz Spatial coordinate system drawn in, which should facilitate understanding of the technical solution.
- the knife 38 with only a single effective cutting edge, the secondary cutting edge 48, is inclined in the xy plane by the axis angle ⁇ n 45 ° to 75 ° with respect to the radial cutting the knife 38 in the center, the working circle 54 of the secondary cutting edge being approximately the center of one of of the cutting edge 48 identifies an annular region swept over with one revolution.
- the knife 40 also has only one effective cutting edge, the
- the main cutting edge 50 has a wedge angle ⁇ H ⁇ 70 °, a clearance angle ⁇ H approximately 70 ° and a negative rake angle ⁇ H of approximately 30 °.
- FIG. 6 shows a schematic spatial representation of the milling head 26 with the view of the knife 38 with only one effective secondary cutting edge 48 (and without a main cutting edge), the edge of the radial support surface 32 on the milling head 26, on which the knife 38 with the Knife breast 39 is supported.
- the xyz coordinates according to FIG. 5 are also clear here.
- the knife 38 inclined relative to the milling cutter axis 13 'or in the y-z plane by the angle ⁇ 20 ° has through-openings 56 for holding screws, not shown, which are screwed to the milling head 26 and thereby tension the knife 38 against the support surface 32.
- the clearance angle ⁇ n , the wedge angle ßn and the rake angle ⁇ n are clearly shown on the minor cutting edge 48. lent highlighted.
- the secondary cutting edge 48 which is designed as a cycloid or clothoid, produces a smooth, clean surface when entering or leaving the workpiece surface, wherein an extremely precise, peeled chip can be achieved which can escape via the flute 46 of the milling head 26.
- the axis angle ⁇ n in a range of 45 - 75 °, a pulling cut is made.
- FIG. 7 shows the knife 38 as a detail with the clothoid-shaped secondary cutting edge 48 which merges tangentially into curved or straight-out areas at the intersection with the dash-dotted line 47.
- the knife back 39 ' carries two bores 56, the geometric connecting straight line of which runs obliquely with respect to the line 47. This arrangement of the bores 56 is intended to bring about a particularly secure hold of the knife on the milling head 26.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19730087 | 1997-07-14 | ||
DE19730087A DE19730087A1 (en) | 1997-07-14 | 1997-07-14 | Face milling machine |
PCT/DE1998/001674 WO1999003655A1 (en) | 1997-07-14 | 1998-06-18 | Flat-surface milling machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0925161A1 true EP0925161A1 (en) | 1999-06-30 |
EP0925161B1 EP0925161B1 (en) | 2003-05-21 |
Family
ID=7835636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98936217A Expired - Lifetime EP0925161B1 (en) | 1997-07-14 | 1998-06-18 | Flat-surface milling machine |
Country Status (7)
Country | Link |
---|---|
US (1) | US6148880A (en) |
EP (1) | EP0925161B1 (en) |
JP (1) | JP2001502262A (en) |
KR (1) | KR20000068547A (en) |
CN (1) | CN1087676C (en) |
DE (2) | DE19730087A1 (en) |
WO (1) | WO1999003655A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8294571B2 (en) | 2008-06-25 | 2012-10-23 | The Boeing Company | Object location and reporting system for harsh RF environments |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19931118B4 (en) * | 1999-07-06 | 2005-11-24 | Metabowerke Gmbh | Motorized hand tool |
DE10034467B4 (en) * | 2000-07-15 | 2010-09-30 | Robert Bosch Gmbh | Disk-shaped cutter head and hand-held power tool |
DE10035559A1 (en) * | 2000-07-21 | 2002-01-31 | Bosch Gmbh Robert | Electric hand held tool for milling or planing wood has a surface sole plate separated vertically from the cutting tool by the depth of cut required. |
DE10035560A1 (en) * | 2000-07-21 | 2002-01-31 | Bosch Gmbh Robert | Hand-operated power tool |
DE10035561A1 (en) * | 2000-07-21 | 2002-01-31 | Bosch Gmbh Robert | Hand-held power tool and cutter head for it |
US6640853B1 (en) * | 2002-09-19 | 2003-11-04 | Hui-Ming Sun | Wood-milling cutter |
US20050079809A1 (en) * | 2003-09-25 | 2005-04-14 | Zayat Charles Dimitry | Stripping tool for the removal of paint, fiberglass, epoxy, and resin from two surfaces simultaneously |
US7273080B2 (en) * | 2003-10-07 | 2007-09-25 | Credo Technology Corporation | Power tool support fixture |
US20050139288A1 (en) * | 2003-12-31 | 2005-06-30 | Mair John F. | Offset router flush cutting base |
US20050215185A1 (en) * | 2004-03-23 | 2005-09-29 | Martin Levesque | Tumbler for artificially ageing the appearance of concrete blocks |
US20060019585A1 (en) * | 2004-07-26 | 2006-01-26 | Zayat Charles D | Device for circular grinding, sanding and stripping tools to attach to any power drive |
DE102004042464A1 (en) * | 2004-09-02 | 2006-03-09 | Robert Bosch Gmbh | Power tool for planing or milling |
DE102006015692A1 (en) * | 2006-03-29 | 2007-10-04 | Michael Weinig Ag | Workpiece processing machine, has tool e.g. front face cutter, comprising cutter rim surrounding inner table for supporting workpiece, where inner table is integral component of tool |
CA2749992C (en) | 2008-01-30 | 2015-12-01 | Lewis E. Stepp | Wood working machine |
GB2523582A (en) * | 2014-02-28 | 2015-09-02 | John Edmund Poynton | Saw-action carpentry plane |
US20210373524A1 (en) * | 2020-06-01 | 2021-12-02 | The Boeing Company | Forming stylus tool design and toolpath generation module for 3 axis computer numerical control manufacturing processes |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1329383A (en) * | 1915-08-13 | 1920-02-03 | United Shoe Machinery Corp | Resurfacing device |
US1817197A (en) * | 1930-04-23 | 1931-08-04 | Adin U Kerns | Rotary plane |
US2085603A (en) * | 1934-10-26 | 1937-06-29 | Black & Decker Mfg Co | Manually portable power-driven rotary planer |
US2395158A (en) * | 1943-12-18 | 1946-02-19 | Goldie M Ball | Power-driven hand plane |
US2785713A (en) * | 1954-03-16 | 1957-03-19 | G & W Tool Company | Power operated rotary end-thrust cutter |
US2839108A (en) * | 1956-05-03 | 1958-06-17 | Carl R Retz | End thrust rotary planing tool |
US2915095A (en) * | 1958-03-25 | 1959-12-01 | Edward A Pelto | Power operated end thrust type rotary shaper planer |
US3381728A (en) * | 1966-03-07 | 1968-05-07 | John Barsha | Routing tool |
US3504434A (en) * | 1967-11-07 | 1970-04-07 | Elmer R Thomsen | Ice edger and line cutter |
US4675975A (en) * | 1985-12-02 | 1987-06-30 | Kucharczyk Peter P | Combination planing and finishing tool |
FR2648385B1 (en) * | 1989-06-16 | 1993-04-30 | Coignard Roland | WOOD WORKING APPARATUS |
DE19543992C1 (en) * | 1995-11-25 | 1997-04-17 | Metabowerke Kg | Motorized hand tool |
US5899252A (en) * | 1997-07-18 | 1999-05-04 | Freud Usa, Inc. | Router bit and routing method |
-
1997
- 1997-07-14 DE DE19730087A patent/DE19730087A1/en not_active Withdrawn
-
1998
- 1998-06-18 CN CN98800981A patent/CN1087676C/en not_active Expired - Fee Related
- 1998-06-18 US US09/254,895 patent/US6148880A/en not_active Expired - Fee Related
- 1998-06-18 EP EP98936217A patent/EP0925161B1/en not_active Expired - Lifetime
- 1998-06-18 KR KR1019997002098A patent/KR20000068547A/en not_active Application Discontinuation
- 1998-06-18 JP JP11506086A patent/JP2001502262A/en active Pending
- 1998-06-18 WO PCT/DE1998/001674 patent/WO1999003655A1/en not_active Application Discontinuation
- 1998-06-18 DE DE59808442T patent/DE59808442D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9903655A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8294571B2 (en) | 2008-06-25 | 2012-10-23 | The Boeing Company | Object location and reporting system for harsh RF environments |
Also Published As
Publication number | Publication date |
---|---|
EP0925161B1 (en) | 2003-05-21 |
CN1087676C (en) | 2002-07-17 |
WO1999003655A1 (en) | 1999-01-28 |
DE59808442D1 (en) | 2003-06-26 |
CN1234760A (en) | 1999-11-10 |
DE19730087A1 (en) | 1999-01-21 |
JP2001502262A (en) | 2001-02-20 |
KR20000068547A (en) | 2000-11-25 |
US6148880A (en) | 2000-11-21 |
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