EP0109791B1 - Maschinenladeeinrichtung mit magnetischem Werkstückmitnehmer - Google Patents

Maschinenladeeinrichtung mit magnetischem Werkstückmitnehmer Download PDF

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Publication number
EP0109791B1
EP0109791B1 EP19830306685 EP83306685A EP0109791B1 EP 0109791 B1 EP0109791 B1 EP 0109791B1 EP 19830306685 EP19830306685 EP 19830306685 EP 83306685 A EP83306685 A EP 83306685A EP 0109791 B1 EP0109791 B1 EP 0109791B1
Authority
EP
European Patent Office
Prior art keywords
workpart
track
driver
unload
load
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.)
Expired
Application number
EP19830306685
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English (en)
French (fr)
Other versions
EP0109791A2 (de
EP0109791A3 (en
Inventor
Lawrence I. Millay
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.)
Ex-Cell-O Corp
Original Assignee
Ex-Cell-O Corp
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.)
Filing date
Publication date
Application filed by Ex-Cell-O Corp filed Critical Ex-Cell-O Corp
Publication of EP0109791A2 publication Critical patent/EP0109791A2/de
Publication of EP0109791A3 publication Critical patent/EP0109791A3/en
Application granted granted Critical
Publication of EP0109791B1 publication Critical patent/EP0109791B1/de
Expired 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/35—Accessories
    • B24B5/355—Feeding means
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically

Definitions

  • the present invention relates to machine tools and, in particular, to load/unload mechanisms for machine tools wherein magnetic or other attractive forces may be present between the workpart and workpart driver system, especially to internal grinding machines with magnetic workpart drivers.
  • the linear load tooling is a self-contained unit which can be set up away from the grinding machine when job change-over is required and which is attached or supported as a unit adjacent the workhead of the grinding machine.
  • the linear load tooling described in the aforesaid TECHNICAL BULLETIN includes a cylinder which actuates a workpart injector/ejector mechanism and a limit switch to control actuation of the cylinder.
  • the linear load tooling is self-contained and thus the cylinder and limit switch are attached with the other load tooling components and removed therewith as a unit for job change-over.
  • An object of the invention is to provide a loader apparatus or tooling especially useful for loading and unloading small size or miniature workparts on a grinding or other machine having a workpart driver wherein magnetic forces are present between the workpart and driver.
  • loader apparatus for machine tools of the type having a magnetic workpart driver means of a given outer dimension and means for feeding workparts to and from the workpart driver means
  • the loader apparatus comprising a support plate means having an access opening adapted to receive the driver means and a workpart load/unload track defining a guide track surface extending across the support plate means and having a load portion and unload portion, and an injector/ejector means slidably mounted on said support plate means to convey a workpart from the load portion of the track to the workpart driver means and then back to the track for discharge through the unload portion thereof, characterised in that the guide track surface defined by the ioad/unioad track does not overlap the outer dimension of the workpart driver means in use so that, on ejection of a workpart from the workpart driver means by the ejector means the magnetic attractive forces between the workpart and workpart driver means are reduced to facilitate removal of the workpart from the driver means and discharge through the unload portion of the track
  • the loader apparatus or tooling includes a support plate means having an access opening through which the magnetic driver of the machine workhead extends such that the driving face thereof can engage and drive (rotate) the workpart.
  • the support plate means also includes a workpart load/unload track or chute extending thereacross in non-overlapping relation to the face of the workpart driver to substantially reduce any residual magnetic forces between the workpart and driver during ejection.
  • the load/unload track is located above the outer diameter of a hollow cylindrical workpart driver.
  • a passage is provided with an open end opening into the track at an orientation to direct a fluid stream toward the unload portion thereof.
  • the outer end of the passage is connected to a source of fluid under pressure, such as air or coolant. Fluid emitted into the track or chute strikes the workpart being ejected to augment the action of gravity thereon in causing the workpart to roll down the unload portion of the track.
  • the loader apparatus or tooling also typically includes an injector/ejector mechanism slidably mounted on the support plate means transverse to the track for pushing a workpart from the load portion of the track to the driver face and then pushing the ground workpart back off the driver face to the track for discharge out of the unload portion thereof with the assistance of the fluid stream.
  • the injector/ejector mechanism is driven by the plunger of a cylinder means and controlled by switch means.
  • the cylinder means and switch means are carried on a carrier plate operatively associated with the machine.
  • the plunger of the cylinder means is releasably connected to the injector/ejector mechanism to power same.
  • FIGS 1-8 illustrate a linear loader tooling or apparatus constructed in accordance with the invention for use on a known centerless grinding machine.
  • the loader apparatus is used with other components such as the workhead, magnetic driver, grinding wheel, wheel feed mechanism, dresser, etc., employed on such grinding machines.
  • the present invention is not limited to this particular type of grinding machine or, for that matter, to any particular type of machine tool wherein a workpart is rotated during machine operation.
  • FIG 3 illustrates the loader apparatus 10 operatively associated with the workhead 12 and magnetic driver 14 of the centerless grinding machine of the type referred to above.
  • the loader apparatus 10 and workhead 12 are mounted on a bed plate 16 of the machine.
  • the magnetic workpart driver 14 is attached to the end of a rotatable spindle (not shown) in the workhead in known manner.
  • the workpart driver has a cylindrical driving portion 17 with an annular end driving face 18 which engages the workpart W through magnetic flux effects as is well known and rotates the workpart during grinding of the inner diameter.
  • a preferred workhead and magnetic driver for use with the loader tooling of the present invention is described in co-pending patent application entitled "Machine Workhead with Magnetic Driver" filled in the names of Larry Millay and Victor Dzewaltowski of common assignee herewith.
  • the linear loader tooling or apparatus includes a machine carrier plate 20 having an upstanding portion 22 and a base portion 24 in a dovetail shape to be slidably received in slot 26 in the bed plate 16.
  • a suitable clamp 28 is provided to retain the carrier plate 20 in final adjusted position adjacent the workhead 12, Figure 2.
  • the upstanding portion 22 includes an access opening 30 to receive the magnetic driver 14 extending from the workhead.
  • a support plate 23 is attached to plate 20 and is machined to provide a diagonal channel 32 on its front side (facing away from the workhead) extending at a 45° angle relative to horizontal in Figure 1 and to provide a cross channel 34 extending from the left side of channel 32 for purposes to be described hereinafter.
  • a sliding member 36 Slidably received in channel 32 and cross channel 34 is a sliding member 36 shown in Figure 4.
  • the sliding member includes a pedestal 38 at one end to carry an ejector finger 40, Figure 2, and is releasably connected at the opposite end to the plunger 42 of a pneumatic or other suitable cylinder as will be more fully explained herebelow.
  • an elongated slot 46 providing access for the workpart driver 14 to the workpart.
  • An elongated slot 47 is also provided at the end of the sliding member adjacent plunger 42 providing two tongues 39 which are screwed to spaced lands on block 100 by screws 51.
  • a lateral flange 48 extends from the sliding member between the aforementioned ends and carries an interceptor finger 50, Figure 2.
  • Tooling carrier plate 52 is attached to plates 20 and 23 by means of bolts 54.
  • Carrier plate 52 is machined to have grooves 56 adapted to adjustably receive bearing shoes 58 at a 90° orientation to one another.
  • another groove 60 is provided at an angle bisecting the shoe grooves 56.
  • a non-magnetic (phosphorus bronze alloy) backrail 64 is received in and extends across the carrier plate 52 and provides a surface over which the workparts are slid to the driver face.
  • carrier plate 52 includes an access opening 76 coaxial with openings 30 in plates 20 and 23 for the same purpose of receiving the magnetic driver 14.
  • Figure 2 shows the various loader tooling components referred to above attached to the sliding member 36 and carrier plate 52.
  • bearing shoes 58 are attached in the grooves 56 and the guide blocks 66, 68, 70, 72, 74 are attached to carrier plate 52.
  • guide block 66 is in spaced facing relation to guide blocks 68, 70 to define therebetween a load portion 76 of track 80.
  • Guide block 72 in turn is in spaced facing relation to guide block 74 and interceptor finger 50 to define therebetween the unload portion 82 of track 80.
  • a front cover plate 85 Figure 8, is attached as by screws 87 received into threaded holes 91 on guide blocks 68, 70 and 72 to close off the load/unload track 80 on the front side, providing a passage for the workparts to roll through.
  • a load chute 84 is mounted on plate 20 and supplies workparts W to the load portion of track 80.
  • An unload chute 86 is mounted on the machine base plate 89 and receives finish ground workparts from the unload portion of the track 80.
  • bottom surface S of track 80 defined by guide blocks 70, 72 and interceptor finger 50 is located above the outer diameter or dimension D of the magnetic driver 14 so that there is no overlap therewith, Figure 7. That is, when the workpart is received in track 80 for discharge, the outer diameter of the workpart does not overlap the outer diameter of the workpart driver when viewed in end elevation looking from the load/ unload assembly toward the workhead 12.
  • This non-overlapping relation between the track (workpart) and magnetic driver greatly reduces residual magnetic forces on the small, lightweight workpart as it is removed from the driver and discharged into the track 80 by ejector finger 40 for unloading down unload portion 82 of the track.
  • the cylinder 44 and proximity switches 90, 92 are carried on an accessory carrier plate 94 which is attached to the machine plate 20 by bolts 96.
  • the proximity switches 90, 92 are designed to control actuation of the cylinder and extent of plunger movement as is well known.
  • the plunger 42 is releasably connected to a T-shaped block 100 slidably mounted in channel 32 by having a threaded end 97 received in threaded hole 98 in block 100.
  • a set screw 99 is provided in block 100 as shown to lock the end 97.
  • an injector member 102 having an injector finger 104 at one end to push a workpart to the magnetic driver 14 and having a T-shape at the other end with the wings of the T-shape serving to actuate the proximity switch sensors 106.
  • the injector member 102 is fastened to block 100 by screws 103.
  • the interceptor finger 50 moves diagonally left into the unload portion 82 of the track to allow the ejected workpart to roll partially down the unload portion to make room for the next "green " workpart in the load portion to align itself between the injector finger and ejector finger.
  • the plunger 42 moves out of the cylinder to cause the injector finger to push the workpart to the magnetic driver 14, repeating the load/unload cycle.
  • the interceptor finger 50 will move . diagonally to the right in the Figure and allow the ground workpart to roll down the remainder of the track unload portion 82 into discharge (unload) chute 86.
  • the non-overlapping relation mentioned above between the track 80 and magnetic driver outer diameter D reduces residual magnetic forces on the workpart as it is conveyed back to track 80 and as it rolls partially along the unload portion 82 thereof as restricted by interceptor finger 50.
  • a fluid stream or jet (not shown) is emitted into the unload portion 82 of the track so as to strike the ground workpart upon return to the track by the ejector finger 50 and as it begins to roll down unload portion 82. Rolling of the workpart into the unload track portion against the interceptor finger is thus facilitated.
  • the fluid stream is emitted from an orifice or opening 120 in filler plate 122, see Figure 2, and received in counterbore 124 in carrier plate 52, Figure 1.
  • the orifice 120 is at the end of a passage 126 extending through plate 122 as shown best in Figure 2.
  • the passage 126 communicates with a passage 130 extending in the support plate 23, in particular at junction 128.
  • Passage 130 communicates with another passage 132 in the machine carrier plate 20 at junction 134.
  • the passage 132 extends to a fitting 136 which is connected to a suitable source of pressurized gas, air, coolant or other fluid 138.
  • switch means are provided to control injection of the fluid into the track when the ground workpart is returned thereto by ejector finger 40.
  • filler plate 122 includes a central aperture 140 to receive the magnetic workpart driver 14 whose annular driving face 18 is substantially coplanar with the filler plate 122 as well as non-magnetic back rail 64 received in the tooling carrier plate 52, Figure 1.
  • a semi-circular notch 142 is provided on the circumference of the filler plate 122 and in conjunction with hole 150 in plate 152 is adapted to receive an alignment pin on screw 152 to insure passages 126 and 130 are in proper fluid flow communication at junction 128.
  • the load/unload apparatus of the invention has been described hereinabove with reference to a machine workhead having a magnetic workpart drive, it is equally applicable to a machine workhead using a conventional non-magnetic pressure-clamp workpart driving arrangement.
  • the apparatus of the invention may find use in such an arrangement when for example the workpart itself carries residual magnetism acquired from a previous operation on the workpart and wherein magnetic or other attractive forces between this workpart and pressure clamp driver interface or interrupt normal ejection of the workpart.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Jigs For Machine Tools (AREA)
  • Feeding Of Workpieces (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (5)

1. Ladevorrichtung (10) für Werkzeugmaschinen, welche eine magnetische Werkstück- Antriebseinrichtung (14) mit einer gegebenen Außenabmessung (D) und Einrichtungen (84) zum Transportieren von Werkstücken (W) zu der Werkstück-Antriebseinrichtung (14) und davon weg aufweist, wobei die Ladevorrichtung (10) eine Tragplatteneinrichtung (23) mit einer Zugangsöffnung (30) für die Aufnahme der Antriebseinrichtung (14) und mit einer Werkstücksbelade-Entlade-Führungsbahn (80) aufweist, welche eine Führungsbahnfläche (S) bildet, die sich über die Tragplatteneinrichtung (23) erstreckt und einen Beladeabschnitt (76) und einen Entladeabschnitt (82) aufweist, und eine Einstoß-Auswerfeinrichtung (104, 40) aufweist, die gleitend verschiebbar an der Tragplatteneinrichtung (23) angebracht ist, um ein Werkstück (W) aus dem Beladeabschnitt (76) der Führungsbahn (80) zu der Werkstück-Antriebseinrichtung (14) und dann zurück zu der Führungsbahn (80) für die Abgabe über den Entladeabschnitt (82) zu fördern, dadurch gekennzeichnet, daß die Führungsbahnfläche (S), die von der Belade-Entlade-Führungsbahn (80) gebildet wird, die Außenabmessung (D) der Werkstückantriebseinrichtung (14) in Betrieb nicht überlappt, so daß beim Auswerfen eines Werkstücks (W) aus der Werkstück-Antriebseinrichtung (14) durch die Auswerfereinrichtung (40) die magnetisch anziehenden Kräfte zwischen dem Werkstück (W) und der Werkstück-Antriebseinrichtung (14) verringert werden, um das Entfernen des Werkstücks (W) aus der Antriebseinrichtung (14) und die Abgabe durch den Entadeabschnitt (82) der Führungsbahn (80) zu erleichtern.
2. Ladevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Werkstück-Einstoß-Auswerfeinrichtung (104, 40) an einer Schlitteneinrichtung (36) an der Tragplatteneinrichtung (23) angebracht ist und eine Einstoßeinrichtung (104), um ein Werkstück (W) aus dem Beladeabschnitt (76) der Führungsbahn (80) zur Antriebseinrichtung (14) zu drücken, und eine Auswerfereinrichtung aufweist, um ein Werkstück (W) von der Antriebseinrichtung (14) zur Führungsbahn (80) zu schieben, damit es durch den Entladeabschnitt (82) abgegeben wird.
3. Ladevorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß eine Zylindereinrichtung (44) mit einem Stößel (42) und eine Schalteinrichtung (90, 92) zum Steuern der Zylindereinrichtung (44) an der Vorrichtung angebracht sind und daß der Stößel (42) lösbar mit der Schlitteneinrichtung (36) verbunden ist, um ihn über die Tragplatteneinrichtung (23) so zu bewegen, daß die Tragplatteneinrichtung (23) und die Einstoß-Auswerfereinrichtung (104, 40) von der Vorrichtung entfernt werden kann, während der Zylinder und die Schalteinrichtung in der Vorrichtung verbleiben.
4. Ladevorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch einen Fluidkanal (126, 130, 132), dessen eines Ende miteiner Fluiddruckquelle (138) verbunden ist und dessen anderes offenes Ende (120) in Verbindung mit der Führungsbahn (80) steht, wobei das offene Ende (120) so ausgerichtet ist, daß Fluid in die Führungsbahn (80) gerichtet wird, um die Abgabe des Werstücks (W) über den Entladeabschnitt (82) zu erleichtern.
5. Ladevorrichtung nach Anspruch 4, bei welcher das offene Ende (120) des Fluidkanals so ausgerichtet ist, daß Fluid in den Entladeabschnitt (82) der Führungsbahn (80) gerichtet wird.
EP19830306685 1982-11-23 1983-11-02 Maschinenladeeinrichtung mit magnetischem Werkstückmitnehmer Expired EP0109791B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US44413082A 1982-11-23 1982-11-23
US444130 1982-11-23

Publications (3)

Publication Number Publication Date
EP0109791A2 EP0109791A2 (de) 1984-05-30
EP0109791A3 EP0109791A3 (en) 1984-10-17
EP0109791B1 true EP0109791B1 (de) 1987-09-02

Family

ID=23763628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830306685 Expired EP0109791B1 (de) 1982-11-23 1983-11-02 Maschinenladeeinrichtung mit magnetischem Werkstückmitnehmer

Country Status (7)

Country Link
EP (1) EP0109791B1 (de)
JP (1) JPS59146731A (de)
AU (1) AU2096483A (de)
BR (1) BR8306385A (de)
DE (1) DE3373284D1 (de)
ES (1) ES527445A0 (de)
SE (1) SE456144B (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706369A (en) * 1953-05-07 1955-04-19 Bryant Grinder Corp Centerless grinding machine with loading and unloading mechanism
US2723499A (en) * 1953-07-06 1955-11-15 Bryant Grinder Corp Centerless grinding machine
US2927406A (en) * 1957-07-09 1960-03-08 Bryant Grinder Corp Work loading and supporting device for an internal grinding machine
GB1394434A (en) * 1972-08-21 1975-05-14 Newall Eng Grinding machines and loading mechanisms therefor
FR2266575B1 (de) * 1974-04-08 1976-12-17 Roulements Soc Nouvelle
JPS59337B2 (ja) * 1976-02-10 1984-01-06 セイコ−精機株式会社 ワ−クの自動供給排出装置

Also Published As

Publication number Publication date
ES8504523A1 (es) 1985-05-01
SE456144B (sv) 1988-09-12
EP0109791A2 (de) 1984-05-30
EP0109791A3 (en) 1984-10-17
JPS59146731A (ja) 1984-08-22
SE8306425L (sv) 1984-05-24
BR8306385A (pt) 1984-06-26
ES527445A0 (es) 1985-05-01
DE3373284D1 (en) 1987-10-08
SE8306425D0 (sv) 1983-11-21
AU2096483A (en) 1984-05-31

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