US3619956A - Hydraulic feeding device for a honing tool - Google Patents

Hydraulic feeding device for a honing tool Download PDF

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Publication number
US3619956A
US3619956A US28386A US3619956DA US3619956A US 3619956 A US3619956 A US 3619956A US 28386 A US28386 A US 28386A US 3619956D A US3619956D A US 3619956DA US 3619956 A US3619956 A US 3619956A
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Prior art keywords
tool
honing
piston
valve
feeding
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Expired - Lifetime
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US28386A
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English (en)
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Christoph W Gehring
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Individual
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Individual
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Priority claimed from DE19691919403 external-priority patent/DE1919403C/de
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    • 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
    • B24B33/10—Accessories
    • B24B33/105—Honing spindles; Devices for expanding the honing elements

Definitions

  • a hydraulic motor effects expansion of the honing tool and when the honing tool engages the work and is retarded in rotation thereby, a rotary valve is closed to interrupt the draining of fluid from the hydraulic motor and thereby halt the expansion of the tool. Further expansion of the tool during a work operation is effected by another valve which permits controlled incremental draining of fluid from the hydraulic motor. Reversing of the supply of fluid to the hydraulic motor permits collapsing of the tool at the end of a work operation.
  • the present invention relates to a hydraulic feeding device for controlling the feeding movement of a honing tool which comprises a hydraulic cylinder piston system connected to the honing tool and at least one control device for effecting a shiftover from fast traverse to fine feeding movement.
  • the fast traverse feeding movement necessary for reducing the auxiliary process time has to be maintained until the honing strips of the honing tool engage the workpiece.
  • the fast traverse feeding movement is checked by means of an adjustable abutment.
  • Such abutment brings about the drawback that it must be adjusted in conformity with the smallest drill diameter, and therefore will not be satisfactory when the workpiece prior to the honing operation has major tolerances.
  • the drawback inherent thereto consist in that the abutment has to be readjusted when shifting over to other diameter sizes.
  • the increase in pressure occurring when the honing tool engages the workpiece is employed as signal for shifting from fast traverse to fine feeding movement.
  • the fine feeding movement is carried out by means of magnetic valves in such a way that small adjustable quantities of oil are either intermittently or continuously conveyed to the pressure chamber of the hydraulic cylinder.
  • FIG. 1 shows an axial longitudinal section through the feeding device according to the invention.
  • FIG. 2 is a section taken along the line II-II of FIG. 1.
  • FIG. 3 is a cross section taken along the line IIIIII of FIG. 1.
  • FIG. 4 diagrammatically illustrates the hydraulic circuit of the feeding device.
  • the fluid cylinder piston system connected to the honing tool forms a rotary valve for the outlet of the piston chamber which decreases during the feeding movement.
  • the frictional entrainment occurring during the starting of the honing tool on the workpiece is taken advantage of for rotating the hydraulic cylinder serving as rotary valve, about its longitudinal axis so that said rotary valve will close a control bore which makes possible the return of the pressure fluid during the fast traverse feeding movement.
  • the hydraulic cylinder may in this instance be formed by a rotatable bushing which is rotatable over a limited rotary angle in a housing against a return force, especially against the force of a return spring.
  • the said bushing comprises an outlet bore for the second piston chamber which decreases during the feeding movement, said discharge bore being intended for releasing the pressure fluid acting upon the rear side of the piston.
  • This bore will, in view of the relative rotation between bushing and housing as it occurs by the frictional engagement, move over and shut off the control bore arranged in the housing and connected to a return conduit.
  • the bushing is non-displaceably guided in axial direction by two thrust bearings in the housing coupled to the driving rod of the honing machine and can only pass through an angular path relative to the housing, which angular path is limited by two abutments.
  • the bushing is held by the return force against the first one of the two abutments while the return force is advantageously exerted by a spring.
  • the double acting piston of the feeding device has its end face acted upon by a pressure fluid.
  • the pressure fluid passes through a pressure conduit in to the first piston chamber, whereas the second piston chamber, located on the back side of the piston, communicates with the return conduit through the then open control bore.
  • the bushing which acts as a rotary valve has a second outlet bore which with all rotary turning adjustments of the bushing permits a passage from the second rearward piston chamber to a control passage serving as return conduit which latter leads to control means adapted to be actuated at random.
  • the pressure fluid may in a continuous manner or step wise be withdrawn from the piston chamber in small quantities and be used for the fine adjustment of the honing tool.
  • the return conduit it is possible in the return conduit to provide either an adjustable fine throttle valve or an adjusting dosing valve. In both instances advantageously an electromagnet may be provided for controlling the valves.
  • the said control means are installed directly in the housing receiving the bushing or is connected thereto.
  • the illustrated hydraulic feeding device is intended for a honing tool H of a honing machine which is not illustrated in detail.
  • This honing machine through the intervention of a driving rod A imparts upon the honing tool H a rotary as well as an axially reciprocable movement.
  • a stufiing box S is inserted into the lower portion of the bore of the hydraulic cylinder 2.
  • the piston rod K is passed through said stufiing box S in a pressure-tight manner.
  • the lower end of the piston rod K, which lower end is received in the honing tool H, is provided with an upper cone K1 and a lower cone K2. These cones drive the honing strips H1 and H2 radially outwardly when the hydraulic piston during its fast traverse movement or during a considerably lower and consequently more sensitively effected fine movement carries out its feeding movement toward the stuffing box S at which it deeper penetrates the core member H3.
  • the hydraulic piston 2 forms a bushing which in the housing 3 that forms the lower end section of the driving rod A by means of two axial groove ball bearings in non-displaceable in axial direction but is rotatably journalled with regard to the housing 3 for a rotation to a limited extent.
  • the axial bearing play of the bushing 2 in the housing 3 For purposes of adjusting the axial bearing play of the bushing 2 in the housing 3,
  • a threaded sleeve 4 similar to a box nut, the threaded connection 6 of which with regard to the housing 3 can be arrested by a counter nut 7.
  • Bushing 2 is, with small radial play, fitted into the bore of the housing 3 and is adapted to carry out a relative rotary stroke with regard to housing 3 which stroke is limited by two abutments.
  • two cylinder pins 8 may form these abutments which are firmly located in the lower end face 9 of the housing 3 and engage two grooves 10 which are located in a collar on the bushing 2.
  • a torsion spring 12 is provided which causes one end of the grooves 10 of the bushing to engage the respective cylinder pin 8.
  • an outlet bore 13 provided in the lower portion of the bushing 2 and extending transverse to the axis of the bushing coincides with a control bore 14 in the housing 3.
  • This control bore 14 communicates through two axis parallel longitudinal bores 15 and 17 and through a transverse bore 16 interconnecting said bores 15 and 17, with a pressure fluid distributor 20 which is located above the housing 3.
  • the control bore 13 communicates with a connection 34a of a pressure fluid conduit 34 which during the fast traverse feeding movement serves as return conduit for the pressure fluid displaced from the second rearward piston chamber.
  • a second outlet bore 21 which is offset by with regard to the outlet bore 13.
  • Said second outlet bore 21 has an oblong shape and extends in the circumferential direction of the bushing.
  • the bore 21 is associated with the traverse bore 22 in the housing in such a way that in each position of the bushing 2, the bore 22 remains open and thus permits a passage from the second piston chamber 35 to a control passage 23, 24, 2'5 and 26, serving as return line while in the distributor 20 through a connecting passage 36a communication exisits with the second return conduit 36.
  • a fine throttle means 37 which is equipped with an electromagnetic control valve 38.
  • An electromagnet E2 of said valve 38 is adapted when in energized condition to occupy the control position 1 at which a communication between the return conduit 36 nd the pressure medium reservoir T is established.
  • the upper piston chamber 27 located above the piston is through an axis parallel bore 28 in bushing 2 and a longitudinal bore 29 and furthermore by a transverse bore 30 in communication with the uppermost connecting section 33a for a pressure medium conduit 33.
  • the upper piston chamber 27 is, during the feeding movement in conformity with the hydraulic circuit of FIG. 4 supplied with a pressure medium.
  • the liquid pressure medium in the present instance oil, is withdrawn from the supply reservoir T by a pump 31 driven by a motor M and at a practically constant pressure is held at approximately from six to ten atmospheres above atmospheric pressure by a control valve R.
  • a four-way valve 32 which in FIG. 4, similar to the control valve 38 occupies its zero position 0 as long as the pertaining electromagnet E1 is not energized.
  • control valve 38 provided with a fine throttle 37
  • a dosing valve not shown in the drawing, which is actuated pulse-wise and which during each pulse permits an adjustable quantity of the pressure fluid to pass through and will result in a precise step feed.
  • the control of the throttle valve or the dosing valve may be effected instead of electromagnetically as in the present example, also pneumatically, hydraulically, or manually.
  • the four-way valve 32 and the control valve 38 are turned off.
  • the four-way valve establishes communication between conduit 34 which is connected to the lower pressure chamber 35, and the pump, whereas the conduit which previously serve for feeding the pressure Ifluid is now moved to a position for a non-throttled return to the tank T. Since also the second return conduit 36 is kept in blocked position with regard to the control valve 3 8, the pressure built up in the second piston chamber 35 by pump 31 will be able quickly to return the piston 1 to its starting position so that a new honing cycle can start.
  • valve used for controlling the pressure fluid which valve may be a fine throttle, a dosing valve or the like may be directly built onto the upper part of the housing 3 or built into the same.
  • Small quantities of pressure fluid as they are necessary for flne feeding may be withdrawn from the lower piston chamber 35 through bores 21 and 22 which are always interconnected, and this withdrawal may be effected advantageously by a transverse bore which in FIG. 2 is indicated at 39 by dash lines, and will then connect the passage 25 serving as additional return line with the longitudinal bore 17.
  • a transverse bore which in FIG. 2 is indicated at 39 by dash lines
  • a honing device a radially expansible and contractable honing tool, a cylinder supporting said tool and a double acting piston in the cylinder movable in one direction therein by a supply of pressure fluid to one end thereof to expand said tool and movable in the other direction therein by a supply of pressure fluid to the other side thereof to permit said tool to contract, a source of pressure fluid, a reversing valve connecting said source to said cylinder on opposite sides of said piston, a normally closed control valve connecting said cylinder on said other side of said piston to drain, a drive member supporting said cylinder for rotation thereof together with said tool n one direction during work operations, said cylinder bemg rotatable on said drive member between circumferentially spaced limits and being biased on said member toward the leading one of said limits so as to rotate on said member toward the other of said limits in a direction opposite to said one direction when said tool engages the work during a work operation, and a rotary valve in the connection between said reversing valve and the end of said
  • a honing device in which said rotary valve comprises passage means in said member and cylinder which register when said cylinder is stopped at the leading one of said limits and which are out of register when said cylinder is stopped at the trailing one of said limits.
  • connection from said other side of said piston to said control valve comprises further passage means in said member and cylinder which are in registration in all posit1ons of rotation of said cylinder on said member.
  • a honing device in which said control valve is built into said drive member. 5. A honing device according to claim 3, which inincludes an adjustable throttle valve in series with said control valve to control the rate of fluid flow from said other side of the piston to drain when said control valve is open.
  • a honing device in which said control valve is in the form of a dosing valve.
  • a honing device in which the inlet side of said control valve communicates with said other side of said piston while the outlet side thereof communicates with the connection leading from the reversing valve to the rotary valve.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US28386A 1969-04-17 1970-04-14 Hydraulic feeding device for a honing tool Expired - Lifetime US3619956A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691919403 DE1919403C (de) 1969-04-17 Einrichtung zum Steuern der Zu Stellbewegung eines Honweikzeuges

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US3619956A true US3619956A (en) 1971-11-16

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US28386A Expired - Lifetime US3619956A (en) 1969-04-17 1970-04-14 Hydraulic feeding device for a honing tool

Country Status (4)

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US (1) US3619956A (enrdf_load_stackoverflow)
JP (1) JPS4922507B1 (enrdf_load_stackoverflow)
FR (1) FR2043292A5 (enrdf_load_stackoverflow)
GB (1) GB1250133A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145845A (en) * 1976-02-07 1979-03-27 Maschinenfabrik Gluchauf Beukenberg Gmbh Method and apparatus for honing
US4301624A (en) * 1978-05-30 1981-11-24 S.A. Automobiles Citroen Grinding heads
US20030162485A1 (en) * 2002-02-26 2003-08-28 Becksvoort Mark Lee Adjustable tool body with fluid actuation
US20040253914A1 (en) * 2002-07-10 2004-12-16 Becksvoort Mark Lee Machine tool with fluid actuated helical adjustment of abrasive elements
US20110014854A1 (en) * 2009-07-17 2011-01-20 Honda Motor Co., Ltd. Tool holder
CN110253417A (zh) * 2019-07-05 2019-09-20 宁夏中卫大河精工机械有限责任公司 珩磨加工中心
CN114260818A (zh) * 2022-01-21 2022-04-01 宁夏中卫大河精工机械有限责任公司 一种外圆双进给珩磨头装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5131103U (enrdf_load_stackoverflow) * 1974-08-29 1976-03-06
JPS5137602U (enrdf_load_stackoverflow) * 1974-09-13 1976-03-19
JPS5137603U (enrdf_load_stackoverflow) * 1974-09-14 1976-03-19
JPS5339806U (enrdf_load_stackoverflow) * 1976-09-10 1978-04-06
RU2374060C1 (ru) * 2008-07-30 2009-11-27 Открытое Акционерное Общество "Российские Железные Дороги" Хонинговальная головка для обработки цилиндрических отверстий

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145845A (en) * 1976-02-07 1979-03-27 Maschinenfabrik Gluchauf Beukenberg Gmbh Method and apparatus for honing
US4301624A (en) * 1978-05-30 1981-11-24 S.A. Automobiles Citroen Grinding heads
US20030162485A1 (en) * 2002-02-26 2003-08-28 Becksvoort Mark Lee Adjustable tool body with fluid actuation
US6739949B2 (en) * 2002-02-26 2004-05-25 Micromatic Operations, Inc. Adjustable tool body with fluid actuation
US20040253914A1 (en) * 2002-07-10 2004-12-16 Becksvoort Mark Lee Machine tool with fluid actuated helical adjustment of abrasive elements
US7070491B2 (en) 2002-07-10 2006-07-04 Bates Technologies, Inc. Machine tool with fluid actuated helical adjustment of abrasive elements
US20110014854A1 (en) * 2009-07-17 2011-01-20 Honda Motor Co., Ltd. Tool holder
US8597086B2 (en) * 2009-07-17 2013-12-03 Honda Motor Co., Ltd. Tool holder
CN110253417A (zh) * 2019-07-05 2019-09-20 宁夏中卫大河精工机械有限责任公司 珩磨加工中心
CN114260818A (zh) * 2022-01-21 2022-04-01 宁夏中卫大河精工机械有限责任公司 一种外圆双进给珩磨头装置

Also Published As

Publication number Publication date
JPS4922507B1 (enrdf_load_stackoverflow) 1974-06-08
DE1919403B2 (de) 1973-01-25
DE1919403A1 (de) 1970-10-29
GB1250133A (enrdf_load_stackoverflow) 1971-10-20
FR2043292A5 (enrdf_load_stackoverflow) 1971-02-12

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