EP0795379A1 - Machine for automatic and simultaneous grinding of head valves for internal combustion engines - Google Patents

Machine for automatic and simultaneous grinding of head valves for internal combustion engines Download PDF

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Publication number
EP0795379A1
EP0795379A1 EP96830419A EP96830419A EP0795379A1 EP 0795379 A1 EP0795379 A1 EP 0795379A1 EP 96830419 A EP96830419 A EP 96830419A EP 96830419 A EP96830419 A EP 96830419A EP 0795379 A1 EP0795379 A1 EP 0795379A1
Authority
EP
European Patent Office
Prior art keywords
head
frame
framework
slide
pair
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.)
Withdrawn
Application number
EP96830419A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rocco Cristofaro
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0795379A1 publication Critical patent/EP0795379A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
    • B24B15/08—Machines or devices designed for grinding seat surfaces; Accessories therefor for grinding co-operating seat surfaces by moving one over the other

Definitions

  • This patent application concerns a machine for automatic and simultaneous grinding of head valves for internal combustion engines.
  • the machine in question is an authentic and absolute novelty since this operation has to date been carried out manually, grinding one valve at a time.
  • This operation is performed by an operator using a conventional hand drill whose shaft rotates alternatively in the two rotation directions and ends with a special sleeve clamp which clamps the stem of the valve.
  • the main purpose of this invention is to design a machine which automatically and simultaneously grinds the head valves in a combustion engine.
  • Another scope of the invention is to realise a machine for the automatic and simultaneous grinding of valves which is simple and inexpensive to manufacture and extremely practical and versatile.
  • the machine in question consists essentially of a supporting bridge framework whose upper cross beam has a series of actuators which clamp and rotate all the valves on the head in alternating directions.
  • This framework supports a pair of horizontal shelves at the front on which a slide rests, said slide being characterised by two opposing upright side arms which support a special bearing frame for the engine heads that oscillates 180° around a horizontal axis.
  • This special frame consists of an opposing pair of vertical semicircular plates with centre hub which houses the respective pin at the top of the upright arms, said pair of opposing plates being connected by means of a parallel pair of horizontal bars whose function is to support and guide several sliding blocks each consisting of a sturdy metal rectangular plate equipped at the bottom with a pair of sleeves complete with internal bushings which are fitted and slide along the pair of bars.
  • each sliding block having a series of parallel upside down T shaped grooves in which a conventional device or tool for locking the head above said sliding blocks is fitted.
  • the special frame is turned over by about 90° so that the resting surface of the above pair of bars passes from horizontal loading lock position to vertical working position where the head is turned and moved closer to the upper cross element of the bridge frame where a series of actuators are positioned which clamp and alternately rotate all the valves on the heads fixed on the special frame.
  • Each actuator consists essentially of a body which supports a through shaft terminating frontally with a clamp that secures the stem of the valve, and an arm for rapid mounting and stopping of the same on the cross element of the bridge framework which also houses a horizontal rack by means of which all the actuators mounted on said cross member are driven.
  • Said rack performs alternating strokes thanks to a conventional driving crank system, positioned at one of the two ends of the upper cross member of the bridge framework, next to which the electric motor operating said driving crank system is flanged.
  • the machine in question consists of a supporting framework (1) realised with welded tubular metal profile sections which are essentially bridge shaped and consist of an opposing pair of legs (1a) fitted with feet (1b) and an upper cross member (1c).
  • Said framework being designed to act as a cantilevered support for a pair of horizontal shelves (2) projecting frontally from the end of a slide (3) housed between the legs (1a) where the same slides vertically in tracks (4) fitted on the interior of the legs (1a).
  • Said frame consists of an identical pair of opposing vertical plates (7) fixed integrally by means of a parallel pair of bars (8) which act as support and track for several sliding blocks (9) on which the motor heads are placed and fixed.
  • each of its end plates (7) has a semicircular profile and centre hub which houses the pin (6a) at the top of each of the two upright arms (6); a device (10) for capsizing the special frame is fitted externally to one of the arms (6), said device (10) consisting of a crank (10a) which rotates in alternating directions, as required, an engaging reel having a semi-circular geared profile (7a) obtained on the edge of one of the plates (7) which is thus rotated with respect to its pivot pin.
  • the two plates (7) being characterised by two semi-circumference curved perimeter slots (7b) housing a freely sliding retractable pin with enlarged head which is an integral part of a conventional pneumatic clamp (11) fixed on each arm (6) and designed to block the head-supporting frame once the same has been capsized into the required position by means of the capsizing crank (10a).
  • the heads can easily be positioned and stopped above the sliding blocks (9) by blocking the special frame for as long as necessary in a horizontal position, in other words, so that the resting plane of the bars (8) is horizontal.
  • the sliding blocks (9) are equipped at the bottom with couplings (9a) which slide and can be stopped along the bars (8) while the upper face of said slides has a series of upside down “T" shaped grooves designed as anchorage and clamping housings for the tools and means (of the type generally used on toolholder slides of tooling machines) by means of which the heads are fixed above the sliding blocks (9).
  • crank (12) fitted at the end of a driving shaft (12a) having a horizontal axis, which extends on the front of the supporting framework (1) bridging the legs (1a); thanks to driving gears, the rotation of the shaft (12a) produced by crank (12) drives the slide (3) by means of a conventional mechanical drive.
  • brackets (13) with a rectilinear and horizontal slot (13a) in which a retractable pin with enlarged head slides freely the same being an integral part of a pneumatic clamp (11) designed to stably lock the slide (5) on the shelves (2) similar to the above, fixed on the arms (6).
  • This second slide (5) is operated manually.
  • an electric motor (14) is flanged, said electric motor (14) being provided to operate a pulley (14a), which in turn operates a typical driving crank system (not shown in the enclosed drawings), used to pull in alternating strokes a rack (not shown in the enclosed drawings) positioned under the upper cross-element (1c) of the framework and from which all the actuators (15) installed along said cross-element are driven.
  • each actuator consists of a tapered tubular body (16) supporting a through shaft (17) on which a reel (18) which engages the above rod rack, is splined in an intermediate position.
  • a conventional sleeve clamp (20) is connected by means of a universal joint (19) which clamps and holds the stem of a valve.
  • Said shaft (17) terminates at the back with an enlarged head (17a) against which a precompressed spring (21) rests, said spring (21) being fitted on the shaft and positioned between its head (17a) and the body (16) in order to constantly push the shaft in an axial direction, and holding the same in its reversed position at the end of the stroke.
  • a radial arm (16a) projects from the body and fits and stops in a slot (not shown in the drawings) extending longitudinally for the entire length of the upper cross-element (1c) of the framework (1).
  • a pair of nuts (16b) can be screwed on the arm (16a) to fix the arm quickly and firmly in the slot on the cross-element (1c).
  • the back of the cross-member (1c) has a horizontal rod (22a) which is part of a small frame (22) lying on a vertical plane and oscillating about a horizontal axis parallel to the cross-element (1c); said small frame (22) is in fact pivoted idly between an opposing pair of shelves (23) projecting on the back of the framework (1) and fixed on the legs (1a) of the latter.
  • Oscillation of said frame (22) about its pivoting pins is performed by means of pneumatic cylinders (24) having a horizontal axis, mounted on the framework (1) and connected to an appendix (23b) of the above frame (22).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jigs For Machine Tools (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP96830419A 1996-03-13 1996-07-29 Machine for automatic and simultaneous grinding of head valves for internal combustion engines Withdrawn EP0795379A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMC960033 1996-03-13
IT96MC000033A IT1289328B1 (it) 1996-03-13 1996-03-13 Macchina per la smerigliatura automatica e simultanea di tutte le valvole delle testate dei motori a combustione interna

Publications (1)

Publication Number Publication Date
EP0795379A1 true EP0795379A1 (en) 1997-09-17

Family

ID=11357177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96830419A Withdrawn EP0795379A1 (en) 1996-03-13 1996-07-29 Machine for automatic and simultaneous grinding of head valves for internal combustion engines

Country Status (2)

Country Link
EP (1) EP0795379A1 (enrdf_load_stackoverflow)
IT (1) IT1289328B1 (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102886725A (zh) * 2012-11-01 2013-01-23 机化阀门(沈阳)有限公司 阀门自动打磨机
CN111376144A (zh) * 2020-04-30 2020-07-07 云和县达祥凯机械设计工作室 一种用于轴块的打磨清洁机构
CN115338735A (zh) * 2022-07-26 2022-11-15 宁波顺兴开浩精工机械有限公司 一种二板卧式合模机
CN117428384A (zh) * 2023-12-20 2024-01-23 深圳市宇鸿精密模具有限公司 一种用于模具结构加工用焊接装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1557272A (en) * 1922-07-10 1925-10-13 Albert H Schaefer Valve-seating machine
FR2294802A1 (fr) * 1974-12-18 1976-07-16 Rico Medina Eugenio Machine pour la rectification de soupapes et de leurs sieges sur des culasses de moteurs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1557272A (en) * 1922-07-10 1925-10-13 Albert H Schaefer Valve-seating machine
FR2294802A1 (fr) * 1974-12-18 1976-07-16 Rico Medina Eugenio Machine pour la rectification de soupapes et de leurs sieges sur des culasses de moteurs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
AVGUSTOV: "valve lapping machine", MACHINES AND TOOLING (STANKI I INSTRUMENTY), vol. 45, no. 4, 1974, MELTON MOWBRAY GB, pages 66 - 67, XP002033990 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102886725A (zh) * 2012-11-01 2013-01-23 机化阀门(沈阳)有限公司 阀门自动打磨机
CN102886725B (zh) * 2012-11-01 2014-06-25 机化阀门(沈阳)有限公司 阀门自动打磨机
CN111376144A (zh) * 2020-04-30 2020-07-07 云和县达祥凯机械设计工作室 一种用于轴块的打磨清洁机构
CN111376144B (zh) * 2020-04-30 2021-11-19 云和县达祥凯机械设计工作室 一种用于轴块的打磨清洁机构
CN115338735A (zh) * 2022-07-26 2022-11-15 宁波顺兴开浩精工机械有限公司 一种二板卧式合模机
CN117428384A (zh) * 2023-12-20 2024-01-23 深圳市宇鸿精密模具有限公司 一种用于模具结构加工用焊接装置
CN117428384B (zh) * 2023-12-20 2024-03-15 深圳市宇鸿精密模具有限公司 一种用于模具结构加工用焊接装置

Also Published As

Publication number Publication date
ITMC960033A0 (enrdf_load_stackoverflow) 1996-03-13
IT1289328B1 (it) 1998-10-02
ITMC960033A1 (it) 1997-09-13

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