EP0063983B1 - Machine à roder - Google Patents

Machine à roder Download PDF

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Publication number
EP0063983B1
EP0063983B1 EP82400640A EP82400640A EP0063983B1 EP 0063983 B1 EP0063983 B1 EP 0063983B1 EP 82400640 A EP82400640 A EP 82400640A EP 82400640 A EP82400640 A EP 82400640A EP 0063983 B1 EP0063983 B1 EP 0063983B1
Authority
EP
European Patent Office
Prior art keywords
voltmeter
lapping
signal
piston
threshold
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
EP82400640A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0063983A1 (fr
Inventor
Pierre André Largeteau
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0063983A1 publication Critical patent/EP0063983A1/fr
Application granted granted Critical
Publication of EP0063983B1 publication Critical patent/EP0063983B1/fr
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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
    • 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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/06—Honing machines or devices; Accessories therefor with controlling or gauging equipment

Definitions

  • the present invention relates to lapping machines comprising an expansion cylinder, the piston of which is connected to the expansion rod of a lap, means for detecting the position of the piston of this cylinder and providing a signal which is a function of this position, therefore the expansion of the lapping machine, and means for comparing this signal with a reference value and emitting, when this value is reached, a signal capable of stopping the movement of the piston.
  • DE-A-1 950112 describes a lapping machine of the above type which includes means for modifying the set value in the event of wear of the lapping or of dimensional drift.
  • These means which are pneumatic, are relatively complicated and not very precise and include a large number of mechanical members, such as pawls or nuts.
  • the present invention relates to a lapping machine in which the means for correcting the wear of the lapping are particularly simple and very precise.
  • This lapping machine is characterized in that the means for detecting the position of the jack piston and providing a signal which is a function of this position include a cam secured to the jack piston, and a feeler whose sensitive element is supported on the cam and the body of the expansion cylinder and which supplies an electrical signal to an analog threshold voltmeter comparing this signal to a signal representing the dimension to be reached, and in that the machine comprises means for varying the threshold of the voltmeter.
  • the means for varying the threshold of the voltmeter may include, for example, a digital up-down counter with manual display, a digital analog converter interposed between the counter and the voltmeter, and means for modifying the display of the counter as a function of '' wear of the lapping or the drift of dimension.
  • the means for varying the threshold of the voltmeter may also include a stepping motor, a control screw which is integral in rotation with the shaft of this motor but free in translation relative to it, and is mounted in a nut. fixed, an electronic probe which is controlled by the screw and connected to the voltmeter, and means for rotating the shaft of the stepping motor as a function of the wear of the lapping or of the dimensional drift.
  • a lapping head comprising an expansion cylinder body 1 which is integral with the piston 2 of a ram cylinder, only the lower end of this cylinder being shown.
  • the piston 3 of the expansion cylinder crossed by a spindle 4 whose lower part carries the lapping 5 and whose upper part is mounted in the body 1 by means of a bearing 6 and connected to pin 7 of the lapping machine.
  • the spindle 4 is itself crossed by an expansion rod 8 which carries the expansion cone 9 of the lapping 5 and which is secured in translation with the piston 3 by means not shown in the drawing.
  • a bracket 10 integral with the piston 3 of the expansion cylinder carries a pilot cam 11 which has the same profile as the expansion cone 9.
  • An intermediate feeler 12 is pivotally mounted at 13 on a support 14 fixed to the body 1.
  • This probe carries a shoe which bears on the cam 11 and on which bears the sensitive element of an electronic probe 15 having its body secured to the support 14.
  • the displacement of the piston 3 of the expansion cylinder 1 rotates the probe 12 which actuates probe 15, the latter thus providing a signal which is a function of displacement of the piston 3 and therefore of the expansion rod 8.
  • the lapping machine is associated with an electronic box comprising a voltmeter 16 with two inputs E 1 and E 2 .
  • the input E 1 is connected to the probe 15 while the input E 2 receives a variable signal which is added to the signal of the input E i , and the sum is compared with the fixed threshold of the voltmeter, which indirectly amounts to modifying the set point of the voltmeter.
  • the voltmeter 16 emits in 17 an order (which could be a pulse or a circuit closure) suitable for cutting the supply of a solenoid valve not shown supplying the cylinder 1 of the jack expansion.
  • variable signal defining the setpoint is supplied by a digital up-down counter 18 with manual or electric display, on the dial 19 from which the voltage to be applied in E 2 can be displayed.
  • This counter 18 is connected to the input E 2 via a digital-analog converter 20 with variable gain.
  • the up-down counter 18 has two inputs E 3 and E4. When a pulse is supplied to input E 3 , the smallest decade of the counter, for example, is increased by one; when a pulse arrives at input E4, the same decade is reduced by one.
  • Lapped parts are checked. If the rating measured is within tolerance, the part is accepted; it is rejected if the tolerance is exceeded. If the measured average dimension of a series of parts, while remaining within the tolerance, is offset from the center of tolerance by an excessive value, for example a micron, a pulse is applied to the input E 3 or to the input E4 according to the offset direction. This impulse can be provided automatically by the parts control device.
  • the continuous signal from the digital analog converter 20 is supplied not only to the input E 2 , but also to two voltmeters 21 and 22 respectively at maximum and minimum threshold.
  • the voltmeter 21 is adjusted so as to provide information when a maximum value corresponding to the maximum admissible wear of the lapping is reached.
  • the voltmeter 22 provides a pulse when a minimum value corresponding to the total deflation of the lapping is reached.
  • the outputs of the voltmeters 21 and 22 are connected to the inputs of an OR gate 23 the output of which is connected to a circuit capable of closing the solenoid valve supplying the cylinder 1 of the expansion cylinder and at the same time stopping the machine .
  • a stepping motor 24 is mounted in a fixed support 25.
  • This motor has two inputs E ' 3 and E' 4 which are supplied like the inputs E 3 and E4 and which are such that the arrival of a pulse rotates the motor shaft 26 by one step, in one direction if the pulse is received by input E ' 3 and in the opposite direction if it is received by l 'input E' 4 .
  • a screw 27 is integral in rotation with the shaft 26, but free in translation relative to this shaft; for this purpose, the shaft 26 may, for example, be integral with a toothed wheel engaged in internal grooves of the screw 27.
  • the latter is mounted in a fixed nut 28 and carries at its end a disc 29 on which is in support the tip 30 of an electronic probe 31; the latter is connected to the input E 2 which thus receives a signal which is a function of the movement of the disc 29.
  • the disc 29 is movable between two contacts 32 and 33 which generate pulses when they are reached by the disc 29 and constitute maximum and minimum threshold contacts playing the same role as the threshold voltmeters 21 and 22. It goes without saying that the present invention should not be considered as limited to the embodiment described and shown, but covers, on the contrary, all variants.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP82400640A 1981-04-16 1982-04-07 Machine à roder Expired EP0063983B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8108064 1981-04-16
FR8108064A FR2504047A1 (fr) 1981-04-16 1981-04-16 Machine a roder

Publications (2)

Publication Number Publication Date
EP0063983A1 EP0063983A1 (fr) 1982-11-03
EP0063983B1 true EP0063983B1 (fr) 1984-10-17

Family

ID=9257685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400640A Expired EP0063983B1 (fr) 1981-04-16 1982-04-07 Machine à roder

Country Status (4)

Country Link
US (1) US4516359A (cg-RX-API-DMAC7.html)
EP (1) EP0063983B1 (cg-RX-API-DMAC7.html)
DE (1) DE3260993D1 (cg-RX-API-DMAC7.html)
FR (1) FR2504047A1 (cg-RX-API-DMAC7.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4627196A (en) * 1983-01-03 1986-12-09 Western Gear Machinery Co. Pressure-compensated hydraulic positioning system
WO1987003712A1 (en) * 1985-12-16 1987-06-18 Delapena Honing Equipment Limited Honing machine
FR2654968B1 (fr) * 1989-11-30 1994-07-22 Procedes Machines Speciales Machine de rodage par expansion d'alesages.
FR2728493A1 (fr) * 1994-12-27 1996-06-28 Peugeot Procede et dispositif de rattrapage d'usure d'un outil de rodage d'une piece sur une machine de rodage, notamment d'un rodoir expansible pour alesages

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1544382A (en) * 1977-02-23 1979-04-19 Firestone Tire & Rubber Co Stabilization of polyphosphazenes

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781616A (en) * 1955-03-18 1957-02-19 Barnes Drill Co Honing machine
US3561168A (en) * 1968-04-12 1971-02-09 Heald Machine Co Grinding machine
DE1950112C3 (de) * 1969-10-04 1978-12-07 Wolf Dipl.-Ing. 7441 Zizishausen Nagel Einrichtung zur maßgesteuerten Beendigung der Bearbeitung von Werkstücken auf Honmaschinen
DE2619741C2 (de) * 1976-05-05 1985-12-05 Maschinenfabrik Gehring Gmbh & Co Kg, 7302 Ostfildern Zustellvorrichtung für ein Zerspanwerkzeug zum Bearbeiten von Werkstückbohrungen, insbesondere ein Honwerkzeug
DE2645426C2 (de) * 1976-10-08 1985-05-23 Peter 7442 Neuffen Nagel Einrichtung zur maßgesteuerten Bearbeitung von Werkstücken auf Honmaschinen
DE2711862A1 (de) * 1977-03-18 1978-09-21 Nagel Wolf Honmaschine
DE2711908A1 (de) * 1977-03-18 1978-09-28 Nagel Masch Werkzeug Einrichtung zur hubumsteuerung an honmaschinen
FR2398577A1 (fr) * 1977-07-29 1979-02-23 Citroen Sa Tete de rodage a commande mecanique
GB1554382A (en) * 1978-04-10 1979-10-17 Brown Gear Ind Honing machines
FR2443901A1 (fr) * 1978-12-13 1980-07-11 Citroen Sa Dispositif a commande numerique pour verin hydraulique d'expansion de machines a roder
FR2457744A1 (fr) * 1979-05-28 1980-12-26 Citroen Sa Dispositif de commande d'expansion a verin hydraulique pour machine a roder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1544382A (en) * 1977-02-23 1979-04-19 Firestone Tire & Rubber Co Stabilization of polyphosphazenes

Also Published As

Publication number Publication date
EP0063983A1 (fr) 1982-11-03
DE3260993D1 (en) 1984-11-22
FR2504047B1 (cg-RX-API-DMAC7.html) 1983-05-20
FR2504047A1 (fr) 1982-10-22
US4516359A (en) 1985-05-14

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