EP0430817A1 - Expansions-Läppvorrichtung für Bohrungen - Google Patents

Expansions-Läppvorrichtung für Bohrungen Download PDF

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Publication number
EP0430817A1
EP0430817A1 EP90403420A EP90403420A EP0430817A1 EP 0430817 A1 EP0430817 A1 EP 0430817A1 EP 90403420 A EP90403420 A EP 90403420A EP 90403420 A EP90403420 A EP 90403420A EP 0430817 A1 EP0430817 A1 EP 0430817A1
Authority
EP
European Patent Office
Prior art keywords
expansion
lapping
spindle
transmission
head
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
EP90403420A
Other languages
English (en)
French (fr)
Other versions
EP0430817B1 (de
Inventor
Jean-Claude Pineau
Richard Bonachera
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.)
Procedes Machines Speciales S P M S Ste
Original Assignee
Procedes Machines Speciales S P M S Ste
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 Procedes Machines Speciales S P M S Ste filed Critical Procedes Machines Speciales S P M S Ste
Publication of EP0430817A1 publication Critical patent/EP0430817A1/de
Application granted granted Critical
Publication of EP0430817B1 publication Critical patent/EP0430817B1/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
    • 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 a lapping machine by expansion of part bores, comprising at least one lapping spindle driven in a rotational movement about its axis and in an oscillating movement in axial translation.
  • the lapping spindle carries, at its free end, at least one abrasive or lapping tool for which expansion during machining is controlled by an expansion head mounted on the spindle at a location away from the lapping point.
  • This head comprises, for each lap, an expansion control motor whose movement is transmitted to the lap by a mechanical transmission.
  • an expansion control motor mounted on the casing of the expansion head attacks a so-called dagger push rod by means of an irreversible reducer comprising an endless screw meshing with the teeth outer of a ring whose internal thread is engaged with a screw whose axial movement, in response to the rotation of the motor, causes a corresponding axial displacement of the dagger, which leads to an expansion of the lapping.
  • the presence of this kinematic chain between the expansion control motor and the lapping a chain which may also include a flexible transmission of the double gimbal type, causes the formation of clearances. uncontrolled and uncompensated mechanical, thus producing a significant drift between the practical machining range and the theoretical machining range. Under these conditions, a planned machining value can only be obtained after a series of tests taking into account the clearances and possible bending of the kinematic chain.
  • the subject of the present invention is a lapping machine by expansion of bores on which the lapping of each spindle includes an expansion control eliminating all the clearances so as to allow very tight machining tolerances to be obtained with respect to at the theoretical value.
  • the invention also relates to a lapping machine by expansion of bores on which the expansion control of the lapping is improved in precision by simple, inexpensive and reliable means.
  • the subject of the invention is a lapping machine by expansion of bores on which each lap has two expansion laps whose expansion is controlled by two motors via two transmissions, these two expansion commands comprising means which not only improve the precision of the expansion of the two rods, therefore the machining precision of the two rods, but also eliminates any risk of interference between the expansion commands of the two rods.
  • the lapping machine by expansion of bores comprises at least one lapping spindle driven in a rotational movement around its axis and in an oscillating movement in axial translation and carrying at its free end at least one expansion lapper whose expansion is controlled by an expansion head mounted on the spindle at a location away from the lapper.
  • This expansion head comprises, for each lap, an expansion control motor, the movement of which is transmitted to the lap by a mechanical transmission.
  • a displacement sensor is associated with the transmission, between the expansion control motor and the lap, to detect the position of an element of said transmission and transmit it to the control of the expansion control motor to allow the latter to precisely control the expansion of the lap.
  • this displacement sensor not directly on the engine, but on an element of the transmission closer to the lap, eliminates all the play that may occur between the engine and this element.
  • the sensor may for example be a rotary displacement sensor, in which case it is provided for detecting the displacement of a rotary element of the transmission.
  • the sensor is a linear displacement sensor and detects the position of an element of the mobile transmission along the axis of the spindle.
  • the sensor can in principle be mounted on the lapping itself, but because the lapping itself is rotated, such mounting leads to difficulties in transmitting information from the detector to the control. This is the reason why, according to a preferred embodiment, the sensor is mounted on a part of the spindle which does not participate in the rotation of the latter, preferably on the expansion head.
  • the two linear displacement sensors associated with the two transmissions controlling the two rods comprise two detectors each connected to one of said two elements and cooperating with a common rule.
  • the or each displacement sensor used in the context of the invention may be an optoelectronic, capacitive or, preferably, a magnetic sensor comprising a magnetic detector cooperating with a rule provided with magnetic markers.
  • the lapping spindle 1 according to FIG. 1 is part of a lapping machine by expansion of bores of parts such as automobile parts (connecting rods, pinions, differential housings, etc.) hydraulic distributors and other mechanical elements requiring a very high geometrical precision, machine of which we recognize in figure 2 the part 2 serving to support the spindle 1.
  • parts such as automobile parts (connecting rods, pinions, differential housings, etc.) hydraulic distributors and other mechanical elements requiring a very high geometrical precision, machine of which we recognize in figure 2 the part 2 serving to support the spindle 1.
  • the spindle 1 animated during the running-in of a rotational movement about its axis and of an oscillating movement in axial translation by means not shown, comprises, at its lower end, a double expansion lapping 3 comprising two lapping 4, 4 ′ each consisting of a train of abrasive parts.
  • Such expansion rods are well known and there is therefore no need to describe the structure in more detail in the context of the present invention.
  • the expansion movement of the two lappers 4, 4 ′ during running-in is controlled by a double expansion head 5 which surrounds the pin 1 at the top and which is immobilized in rotation relative to the support 2 by a rod of guide 6.
  • Spindle 1 receives its rotational and oscillatory translation movement by a drive endpiece 7, this movement being transmitted to the two rods 3, 4 by a flexible transmission 8, for example a double gimbal transmission; located between the double expansion head 5 and the two rods 4, 4 ′.
  • the expansion head 5 comprises, for the expansion control of the two rods 3 and 4, two expansion control motors 9 and 9 ′, for example electric stepper motors.
  • each of the two expansion control motors (only the motor 9 ′ is visible) drives an endless screw 10, 10 ′ which meshes with the external toothing of a ring 11, 11 ′ which is mounted in rotation, but immobilized in axial translation in the casing 12 of the head 5.
  • Each ring 11, 11 ′ has an internal thread engaged with a screw 13, 13 ′ movable in axial translation.
  • the body 14 of the spindle 1 is mounted for rotation inside the double head 5.
  • the spindle body 14 provided with a connection cone 15 at its upper end passes through the head 5 in the form of a tubular section 16 provided, from top to bottom, with a first pair of opposite transverse transverse slots 17 and a second pair of opposite transverse transverse slots 17 ′.
  • first hollow transmission element 18 Inside the tubular section 16 of the spindle body 14 are concentrically disposed a first hollow transmission element 18 and a second transmission element 18 ′ arranged inside the element 18.
  • the two transmission elements 18, 18 ′ Which are mounted movable in axial translation, one in the spindle body 14 and the other in the transmission element 18.
  • the transmission element 18 has at its upper end a transverse head 20, the two ends of which pass through the slots 17 of the spindle body 14 and are mounted in the screw 13, by means of two stops 21 and a nut 22 , so as to make the element 18 integral in axial translation with the screw 13, but to allow it to rotate relative to the latter.
  • the internal transmission element 18 ′ has, at its upper end, a transverse head 20 ′, the ends of which pass through both transverse slots opposite through 19 of the external transmission element 18 and the slots 17 ′ of the spindle body 14 and are mounted in the screw 13 ′, by means of two stops 21 ′ and a nut 22 ′, so as to making the element 18 ′ integral in axial translation with the screw 13 ′, but allowing it to rotate relative to the latter.
  • the two transmission elements 18, 18 ′ are integral in rotation with the spindle body 14, but movable in axial translation relative to the latter and relative to each other, their axial positions being controlled by the two expansion control motors 9, 9 ′, via irreversible transmissions comprising the worms 10, 10 ′, the rings 11, 11 ′ and the screws 13, 13 ′.
  • the expansion head 5 is equipped with a double displacement sensor illustrated by FIGS. 3 and 4 to determine and allow precise control of the axial position of the two transmission elements 18, 18 ′ and, consequently, the degree of expansion of the two rods 4, 4 ′.
  • the double displacement sensor 23 comprises a rectilinear rule 24 of a type known per se, fixed by its two ends using a support 25, 26 to the casing 12 of the double expansion head 5, so as to extend parallel to the axis of the spindle 1.
  • the casing 12 has two slots 27, 27 ′ each of which is traversed by a part 28, 28 ′ serving as detector support and integral with the nut 22, 22 ′ and serving as support for a detector 29, 29 ′ cooperating with the rule 24.
  • the rule 24 is a filiform rule and the two detectors 29, 29 ′ surround the rule 24.
  • Such sensors are sold commercially for example in the form magnetic displacement and position sensors.
  • the detectors 30, 30 ′ are initialization detectors for the control, while the detectors 31, 31 ′ and 32, 32 ′ are electrical stops, the detectors 31, 31 ′ constituting high stops and the detectors 32, 32 ′ of the bottom stops. All the detectors 30, 30 ′, 31, 31 ′, 32, 32 ′ provided on the casing 12 cooperate with the sensor supports 28, 28 ′.
  • the user of a double displacement sensor 23 on a double expansion control head for a lapping pin with double expansion lapping not only makes it possible to precisely control the expansion of each lapping, by compensating all the play that may occur between the expansion drive motors and the laps, but also prevent any interference between the two laps, for example a collision of the two laps.
  • Such a collision could in fact occur in the event of one of the two lappers being worn more quickly than the other, in which case the expansion control of the other lapper would become inoperative.
  • the invention is not limited to the position detection of double expansion laps, but also applies to simple expansion laps.
  • displacement sensors other than that shown and described, for example opto-electronic sensors and / or rotary sensors instead of linear sensors.
  • the displacement sensor (s) can be provided not only on the expansion head 5, but also on any other part of the transmission of the expansion movement to the rods 4, 4 ′, for example on the joint 8 or even on the rods 4, 4 ′ themselves. However, the sensors then participate in the rotation of the spindle, which is not the case during mounting on the expansion head.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP19900403420 1989-11-30 1990-11-30 Expansions-Läppvorrichtung für Bohrungen Expired - Lifetime EP0430817B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915836 1989-11-30
FR8915836A FR2654968B1 (fr) 1989-11-30 1989-11-30 Machine de rodage par expansion d'alesages.

Publications (2)

Publication Number Publication Date
EP0430817A1 true EP0430817A1 (de) 1991-06-05
EP0430817B1 EP0430817B1 (de) 1994-02-02

Family

ID=9388003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900403420 Expired - Lifetime EP0430817B1 (de) 1989-11-30 1990-11-30 Expansions-Läppvorrichtung für Bohrungen

Country Status (4)

Country Link
EP (1) EP0430817B1 (de)
DE (1) DE69006461T2 (de)
ES (1) ES2049444T3 (de)
FR (1) FR2654968B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2003031118A1 (en) * 2001-10-09 2003-04-17 Sunnen Italia S.R.L. Tool-holding system for high-accuracy calibration of holes
CN109366358A (zh) * 2018-10-19 2019-02-22 常州市新创智能科技有限公司 一种随型保持打磨辊筒姿态的控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012216360A1 (de) * 2012-09-14 2014-03-20 Komet Group Gmbh Honsystem, insbesondere zum Honen auf einem Bearbeitungszentrum

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711862A1 (de) * 1977-03-18 1978-09-21 Nagel Wolf Honmaschine
DE2831681A1 (de) * 1977-07-29 1979-02-01 Citroen Sa Vorrichtung zur steuerung der ausdehnung eines schleifwerkzeuges
FR2443901A1 (fr) * 1978-12-13 1980-07-11 Citroen Sa Dispositif a commande numerique pour verin hydraulique d'expansion de machines a roder
EP0063983A1 (de) * 1981-04-16 1982-11-03 Automobiles Citroen Honmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711862A1 (de) * 1977-03-18 1978-09-21 Nagel Wolf Honmaschine
DE2831681A1 (de) * 1977-07-29 1979-02-01 Citroen Sa Vorrichtung zur steuerung der ausdehnung eines schleifwerkzeuges
FR2443901A1 (fr) * 1978-12-13 1980-07-11 Citroen Sa Dispositif a commande numerique pour verin hydraulique d'expansion de machines a roder
EP0063983A1 (de) * 1981-04-16 1982-11-03 Automobiles Citroen Honmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP0719617A1 (de) * 1994-12-27 1996-07-03 Automobiles Peugeot Verfahren und Vorrichtung zum Verschleissausgleich eines Werkstücks Honwerkzeugs auf einer Honmaschine, insbesondere eines nachstellbares Honwerkzeug für Bohrungswänden
WO2003031118A1 (en) * 2001-10-09 2003-04-17 Sunnen Italia S.R.L. Tool-holding system for high-accuracy calibration of holes
CN109366358A (zh) * 2018-10-19 2019-02-22 常州市新创智能科技有限公司 一种随型保持打磨辊筒姿态的控制方法
CN109366358B (zh) * 2018-10-19 2020-03-03 常州市新创智能科技有限公司 一种随型保持打磨辊筒姿态的控制方法

Also Published As

Publication number Publication date
ES2049444T3 (es) 1994-04-16
DE69006461T2 (de) 1994-05-19
FR2654968A1 (fr) 1991-05-31
EP0430817B1 (de) 1994-02-02
DE69006461D1 (de) 1994-03-17
FR2654968B1 (fr) 1994-07-22

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