EP0465357A1 - Gerät zum Bearbeiten von Konturen in weichem Material und automatisches Bearbeitungsverfahren mit solchem Gerät - Google Patents

Gerät zum Bearbeiten von Konturen in weichem Material und automatisches Bearbeitungsverfahren mit solchem Gerät Download PDF

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Publication number
EP0465357A1
EP0465357A1 EP91401829A EP91401829A EP0465357A1 EP 0465357 A1 EP0465357 A1 EP 0465357A1 EP 91401829 A EP91401829 A EP 91401829A EP 91401829 A EP91401829 A EP 91401829A EP 0465357 A1 EP0465357 A1 EP 0465357A1
Authority
EP
European Patent Office
Prior art keywords
machining
tool
contour
speed
rotation
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
Application number
EP91401829A
Other languages
English (en)
French (fr)
Other versions
EP0465357B1 (de
Inventor
Michel Ferard
Tanguy Jouan De Kervenouel
Frédéric Sgarbi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0465357A1 publication Critical patent/EP0465357A1/de
Application granted granted Critical
Publication of EP0465357B1 publication Critical patent/EP0465357B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/30—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/002—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor for travelling workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/20—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of plastics

Definitions

  • the invention relates to an apparatus for machining contours of soft material such as polyurethane or other plastic materials, as well as to an automatic machining process suitable for such apparatus.
  • the primary object of the invention is therefore the supply of a tool, and more generally of an apparatus, which makes it possible to produce a machined contour of good quality on such materials, and this even if the machined contour is flexible, when for example we proceed to the removal of burrs in very fine ribs of a few tenths of a millimeter.
  • Another object of the invention is especially interesting for automatic processes and relates to the control of the position of the tool, that is to say of its depth of cut.
  • the cutting force which can provide an estimate of the desired depth of cut is indeed very low and can hardly be captured correctly. We therefore planned another system to achieve a good result.
  • the device machining according to the invention comprises a tool consisting of elastic strips embedded at one end in a rotary block driven by a motor device.
  • the slats are possibly made of an elastic canvas covered with abrasive.
  • burrs of the contour to be machined are flexible, it is advantageous to use a system of non-abrasive brushes pressing on two opposite faces of the contour in order to maintain the burrs around the tool in a state where they are suitable for deburring. . This avoids the folding of the burrs that the tool could cause and which would compromise its effectiveness by rejecting the burrs out of reach of the slats.
  • a system can consist of two brushes carrying the radial elements constituting bending springs; the brushes then rotate around axes more or less parallel to the faces of the contour.
  • the motor device prefferably pneumatic and for the device to include a sensor for the speed of rotation of the tool. It is then possible to adjust the cutting depth of the tool by slaving the rotation speed to a determined value, which can be periodically recalculated as a function of the idle rotation speed and its variations over time.
  • the workpiece 1 comprises a flange 2, or a rib, the edge of which is machined 3 by a deburring operation, but the tool which will now be described is also usable for other types of machining, in particular chamfering.
  • a rotary block 4 provided with lamellae 5 arranged in a radiating manner and which lie in planes through which passes the axis of rotation 7 of the tool 6.
  • the rotary block 4 is subjected to a spindle 8 which drives under the action of a pneumatic motor 9.
  • the slats 5 consist of an elastic fabric, one end of which is embedded in the rotary block 4 and the other end of which comes to rub against the edge 3, along which it is moved. This other end is covered with an abrasive powder which is responsible for the machining.
  • a tachometer 10 fixed to the pneumatic motor 9 measures the speed of rotation of the spindle 8 and of the tool 6. Furthermore, the casing of the pneumatic motor 9 carries a console 15 extended by a beam 16 parallel to the spindle 8 and which passes near the tool 6.
  • the beam 16 carries the axes of two parallel brushes 17 and 18 provided with groups of nylon bristles 19 that the rotation of the brushes 17 and 18 rubs on the two flat and opposite faces 20 and 21 of the collar 2 and the edge 3; the axes of rotation of the brushes 17 and 18 are parallel to the faces 20 and 21.
  • the beam 16 is arranged so as to extend a little next to the flange 2.
  • the bristles 19 of the two brushes 17 and 18 have bearing surfaces which partially overlap or merge, but the brushes 17 and 18 are slightly axially offset and thus remain separate.
  • a motor 22 fixed to the console 15 drives, by a first belt 23, one of the brushes 17, and a second belt 24 interconnects the axes of the brushes 17 and 18 so that the second brush is driven.
  • the bristles 19 are bent by rubbing on the faces 20 and 21 and then straighten out thanks to their elasticity.
  • the opposing forces that the brushes 17 and 18 thus exert on the flange 2 and the edge 3 have the effect of bending the flexible burrs which would otherwise bend under the force of the tool 6 and would be difficult to eliminate.
  • Such a burr bears the reference 29. It is folded around its root (where it is connected to the collar 2) and glued against the upper edge of the collar 2 by the upper brush 17. The tool 6 then attacks it by the root and thus detaches it from the collar 2 rather than eliminating it.
  • the tool 6 is placed obliquely with respect to the surfaces of the flange 2 and only removes material from the edge which carries the burr 29, that is to say it requires chamfering.
  • the tool 6 with blades 5 is much preferable in such a situation to a rotary brush furnished with abrasive bristles because the elastic abrasive structures must be close enough to the region to be deburred to exert a sufficient abrasion force. Hair would therefore be brought to portions of the surface of the flange 2 adjacent to the region to be deburred, which would therefore be scratched, which can be accepted for reasons of aesthetics in many cases, while the strips 5 are curved. over their entire height.
  • the lower brush 18 is intended to raise the burr 29 if necessary, in order to put it within the reach of the upper brush 17.
  • the pneumatic motor 9 is disposed at one end of a slide 30, the other end of which is pushed back by an eccentric 31 actuated by a motor 32.
  • a return system such as a spring 35 holds the end of the slide 30 against eccentric 31; moreover, all of these parts are housed in a terminal member 33 of a robot arm which is not shown in detail and which is programmed to follow approximately the edge 3 to be machined.
  • the slide 30 is held substantially in a direction where its sliding allows it to approach or move the tool 6 away from the edge 3, and therefore to modify the cutting force; the machining passes consist in moving the terminal member 33 along the contour 2 while adjusting the depth of the pass by constantly sliding the slide 30.
  • a potentiometer 34 locates the displacements of the motor 32 and therefore of the eccentric 31.
  • FIG. 3 examine how the servo-control of the tool 6 takes place, but it is previously necessary to devote some considerations to the machining conditions in the technical context of the invention.
  • the tachometer 10 is connected by its output to a filtering system 40 which calculates the real speed ⁇ 1 at each instant.
  • a setpoint speed supply system 41 simultaneously supplies the setpoint speed ⁇ c to be observed.
  • a calculation system 42 collects the two speeds ⁇ 1 and ⁇ c and calculates the angular position P c of the eccentric 31 for which the real speed ⁇ 1 would become equal to the set speed and which is equal to a coefficient near to where t1 designates the instant considered, t0 the instant of the start of the measurements and A is a phase advance corrector.
  • This system has a very short reaction time.
  • the set speed ⁇ c can be chosen proportional to the no-load speed of the tool 6. As this no-load speed varies over time, in particular following variations in supply pressure, temperature or lubrication conditions, the set speed ⁇ c must be recalculated from time to time by the set speed supply system 41. In practice, a measurement can be made each time the tool 6 is released to carry out a new machining pass.
  • the servo described above is interrupted and the eccentric 31 is brought back to a fixed position where the slide 30 is halfway.
  • the tool 6 is brought to a few millimeters from the edge 3, then the end member 33 is brought closer to the edge 3 at slow speed until it touches it (in the direction of the arrow shown). in FIG. 3), after which a decrease in the speed of rotation is detected and the trajectory which has been taught to the robot is traversed by resuming the servo-control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP19910401829 1990-07-04 1991-07-03 Gerät zum Bearbeiten von Konturen in weichem Material und automatisches Bearbeitungsverfahren mit solchem Gerät Expired - Lifetime EP0465357B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9008472 1990-07-04
FR9008472A FR2664191B1 (fr) 1990-07-04 1990-07-04 Appareil d'usinage de contours en materiau tendre et procede d'usinage automatique utilisant un tel appareil.

Publications (2)

Publication Number Publication Date
EP0465357A1 true EP0465357A1 (de) 1992-01-08
EP0465357B1 EP0465357B1 (de) 1994-06-15

Family

ID=9398343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910401829 Expired - Lifetime EP0465357B1 (de) 1990-07-04 1991-07-03 Gerät zum Bearbeiten von Konturen in weichem Material und automatisches Bearbeitungsverfahren mit solchem Gerät

Country Status (4)

Country Link
EP (1) EP0465357B1 (de)
DE (1) DE69102500T2 (de)
ES (1) ES2056600T3 (de)
FR (1) FR2664191B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003921A1 (en) * 1993-07-30 1995-02-09 Western Atlas U.K. Limited Control of 2-axis machine tool
GB2294223A (en) * 1993-07-30 1996-04-24 Western Atlas Uk Ltd Control of 2-axis machine tool
CN105033799A (zh) * 2015-08-05 2015-11-11 海宁联丰磁业股份有限公司 一种磁芯去毛刺装置
CN112847103A (zh) * 2021-01-07 2021-05-28 吴平 一种避免抛光不均匀影响使用的五金机械零件抛光装置
CN114654370A (zh) * 2022-03-17 2022-06-24 漳州喜梦宝家居科技有限公司 一种平板类部件加工用磨砂抛光装置及其使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107262826B (zh) * 2017-07-21 2024-03-15 厦门理工学院 一种金刚石锯片自动开刃机
CN107225468A (zh) * 2017-08-07 2017-10-03 方佳平 一种可调节式硬质手机壳侧键孔打磨装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2374137A1 (fr) * 1976-12-03 1978-07-13 Mitsubishi Heavy Ind Ltd Procede pour arrondir les aretes de pieces et dispositif pour sa mise en application
EP0032102A2 (de) * 1980-01-04 1981-07-15 Framatome Vorrichtung zum Entgraten und Abschrägen von Löchern in perforierten Platten
DE3542817A1 (de) * 1985-12-04 1987-06-11 Wesero Maschinenbau Gmbh Verfahren zur steuerung der zustellung einer buerstmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60263665A (ja) * 1984-06-08 1985-12-27 Hotani:Kk ブラシロ−ルの圧下度自動調整装置
JPS61136761A (ja) * 1984-12-04 1986-06-24 Hinode Eng Kk シ−ト状成形品のバリ取り方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2374137A1 (fr) * 1976-12-03 1978-07-13 Mitsubishi Heavy Ind Ltd Procede pour arrondir les aretes de pieces et dispositif pour sa mise en application
EP0032102A2 (de) * 1980-01-04 1981-07-15 Framatome Vorrichtung zum Entgraten und Abschrägen von Löchern in perforierten Platten
DE3542817A1 (de) * 1985-12-04 1987-06-11 Wesero Maschinenbau Gmbh Verfahren zur steuerung der zustellung einer buerstmaschine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 142 (M-481)(2199) 24 mai 1986, & JP-A-60 263665 (HOTANI K.K.) 27 décembre 1985, *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 333 (M-534)(2389) 12 novembre 1986, & JP-A-61 136761 (HINODE ENG K.K.) 24 juin 1986, *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003921A1 (en) * 1993-07-30 1995-02-09 Western Atlas U.K. Limited Control of 2-axis machine tool
GB2294223A (en) * 1993-07-30 1996-04-24 Western Atlas Uk Ltd Control of 2-axis machine tool
GB2294223B (en) * 1993-07-30 1997-05-07 Western Atlas Uk Ltd Control of 2-axis machine tool
CN105033799A (zh) * 2015-08-05 2015-11-11 海宁联丰磁业股份有限公司 一种磁芯去毛刺装置
CN112847103A (zh) * 2021-01-07 2021-05-28 吴平 一种避免抛光不均匀影响使用的五金机械零件抛光装置
CN114654370A (zh) * 2022-03-17 2022-06-24 漳州喜梦宝家居科技有限公司 一种平板类部件加工用磨砂抛光装置及其使用方法

Also Published As

Publication number Publication date
ES2056600T3 (es) 1994-10-01
FR2664191B1 (fr) 1995-03-31
DE69102500T2 (de) 1995-02-09
DE69102500D1 (de) 1994-07-21
EP0465357B1 (de) 1994-06-15
FR2664191A1 (fr) 1992-01-10

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