WO1994027779A2 - Transportable device for grinding motor vehicle cylinder heads - Google Patents

Transportable device for grinding motor vehicle cylinder heads Download PDF

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Publication number
WO1994027779A2
WO1994027779A2 PCT/FR1994/000608 FR9400608W WO9427779A2 WO 1994027779 A2 WO1994027779 A2 WO 1994027779A2 FR 9400608 W FR9400608 W FR 9400608W WO 9427779 A2 WO9427779 A2 WO 9427779A2
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder head
diesel
tool holder
tool
grinding
Prior art date
Application number
PCT/FR1994/000608
Other languages
French (fr)
Other versions
WO1994027779A3 (en
Inventor
Movses Barsoumian
Original Assignee
Movses Barsoumian
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 Movses Barsoumian filed Critical Movses Barsoumian
Priority to EP94917048A priority Critical patent/EP0684888A1/en
Priority to AU68499/94A priority patent/AU6849994A/en
Publication of WO1994027779A3 publication Critical patent/WO1994027779A3/en
Publication of WO1994027779A2 publication Critical patent/WO1994027779A2/en

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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
    • B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q9/00—Arrangements for supporting or guiding portable metal-working machines or apparatus
    • B23Q9/0014—Portable machines provided with or cooperating with guide means supported directly by the workpiece during action
    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/08—Portable grinding machines designed for fastening on workpieces or other parts of particular section, e.g. for grinding commutators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the present invention relates to a transportable device for grinding cylinder heads of petrol or diesel engines.
  • the device according to the invention makes it possible to easily carry out by the mechanic himself in his own workshop the rectification of the cylinder heads of engines which have been dismantled.
  • the device can be used without any particular support other than the floor or a workbench.
  • FIG. 1 shows the different elements of one of the four clamping arms.
  • This arm is fixed to one of the lateral orifices of the cylinder head by a part (8) by means of two bolts.
  • This part pivots on an axis of the part (9) which has a thread. In this tapping is screwed an axis (10) having a straight thread then a bulge (it) then a .
  • the bulge is drilled in a point (12) to allow, by means of a small axis acting as a key, to rotate the two axis opposite threads which, when turned in one direction o in the other, lengthens or shortens the clamping arm.
  • the top of the arm has a bore (13) through which passes an axle (14) forming part of the chassis of the device according to the invention. Under the alaisage, a groove allows by a vi through it (15) to tighten the part on the axis of the chassis d device
  • Figure 3 shows the frame (16) composed of guide pins (17) and slides (18) with, over its width, the handles (7) for carrying the device.
  • the chassis will be along the length of guide pins and slides for the tool holder system.
  • the clamping arms (3) are mounted on these guide pins on which they can slide according to the size of the cylinder head to be ground.
  • the lead screw (19) moves the tool holder assembly forwards or backwards.
  • the motor with variator and reverser (20) drives the lead screw, while another motor with variator (21) drives the tool holder.
  • Figure 4 shows one of the four feet of adjustable length (6) which are mounted on the width of the frame (16 They consist of two parts which fit one (22) into the other (23) and whose position is blocked by a vi (24). These feet are terminated by rubber pads (25).
  • the extendable feet When the device mounted on a cylinder head is adjusted, o puts the extendable feet so that they touch the ground or the "established without carrying the weight of the device. They represent a safety and make it possible to suppress the vibrations which can occur during rectifications When the cylinder head is removed, these feet allow the device not to rest on the tool holder.
  • 5 shows the tool holder device with its system allowing the tool holder to be raised or lowered. In the part (26) there is a general axis (27) which has a thread.
  • An axis (28) threaded in its lower part enclosed by two bearings allows to lower endre the general axis (27) by means of a crank (29) fixed on the threaded axis (28).
  • one general axis (27) is fixed to a plate (33) by a screw (34) in the middle.
  • This plate (33) goes up and down precisely on five guides (35).
  • a comparator for measuring the vertical displacements of the system.
  • On the plate (33) is fixed by screws (36) a sliding system which allows the lateral movement of the knife-holder plate (1) by crank (37) on mother screw (38).
  • Figure 7 shows the trapezoid slide system.
  • two bearings enclose the axis (40) of the tool holder plate (1).
  • a pulley (32) connected by belt to the motor fitted with a variator allows the drive of the plate.
  • the system carries a comparator (4) which acts as a depth checker, that is to say it makes it possible to assess the thickness of cylinder head removed.
  • This comparator is graduated in 1/100 ° d millimeter. The variation in height of the tool holder is therefore evaluated in hundredths of a millimeter.
  • Figure 8 shows the tool tray (in this case knife holder). It has two tool holder receptacles. In these receptacles, the tool holders have an adjustable entry depth.
  • the tool-carrying plate carries diametrically opposite to the knife-holder (41), a comparator-holder (42) having substantially the same weight as the knife-holder assembly knife.
  • the part carrying the tool e that carrying the axis on which the comparator is fixed during checks are similar.
  • the entry depth of both parts (41) and (42) in the tool holder plate are adjusted according to the width of the cylinder head to be ground, the two parts must always be placed at the same depth to balance the system.
  • Each is clamped in the tool holder plate by a screw.
  • the comparator checks the position of the system on the surface of the cylinder head. It is also graduated to 1/100 ° d millimeter.
  • the device according to the invention concerns all garage owners but also all workshops which need to carry out engine corrections easily and quickly.

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)

Abstract

Transportable device for grinding petrol or Diesel engine cylinder heads. The invention also concerns a transportable device for grinding (surfacing) petrol or Diesel cylinder heads when the engine has been removed. Figure 1 illustrates the device consisting of a tool holder plate (1) placed in the middle of two blocks (2), the blocks themselves being placed along the length of the cylinder head. A clamping arm system (3) is placed on the cylinder head lateral ports and is fastened thereto by bolts. The blocks are then removed, the device's position on the cylinder head is verified by means of comparators (4) and adjusted a last time according to the adjustments made to the clamping arm system (3). The cylinder head grinding tool (5) is then mounted onto the tool holder plate (1). A system for longitudinal, transversal and vertical feed of the manual or motorized tool-carrying system, in conjunction with the motorized rotation of the tool holder plate with its tool, performs grinding of the cylinder head. When the device is not positioned on the cylinder head, feet adjustable in length (6) ensure that the device does not rest on the tool holder. The device according to the invention is especially intended for garages, automobile, tractor and boat repair workshops and indeed for all precision mechanical workshops where Diesel or petrol engine cylinder head grinding is to be performed.

Description

DISPOSITIF TRANSPORTABLE POUR RECTIFIER LES CULASSES TRANSPORTABLE DEVICE FOR GRINDING HEADS
DE MOTEURSOF MOTORS
La présente invention concerne un dispositif transportable pour rectifier les culasses de moteurs à essence ou Diesel .The present invention relates to a transportable device for grinding cylinder heads of petrol or diesel engines.
La rectification de ces culasses est traditionnellement faite par un atelier de mécanique de précision qui possède souvent des machines appropriées pour cette opération, mais ces machines sont à l'usage des ateliers de mécanique de précision, c'est-à-dire destinées à être utilisées par des techniciens compétents.The rectification of these cylinder heads is traditionally done by a precision mechanics workshop which often has machines suitable for this operation, but these machines are for the use of precision mechanics workshops, that is to say intended to be used by qualified technicians.
Le dispositif selon l'invention permet de faire effectuer aisément par le garagiste lui-même dans son propre atelier la rectification des culasses de moteurs qui ont été démontées. Le dispositif peut être utilisé sans aucun support particulier autre que le sol ou un établi.The device according to the invention makes it possible to easily carry out by the mechanic himself in his own workshop the rectification of the cylinder heads of engines which have been dismantled. The device can be used without any particular support other than the floor or a workbench.
Par ailleurs, le serrage des culasses dans la plupart des systèmes traditionnels amène le risque de déformer la culasse en raison de la pression exercée pour l'immobiliser. Le système selon l'invention n'entraîne aucun risque de déformation de la culasse.Furthermore, tightening the cylinder heads in most traditional systems brings with it the risk of deforming the cylinder head due to the pressure exerted to immobilize it. The system according to the invention does not entail any risk of deformation of the cylinder head.
Lorsque la culasse a été démontée et posée au sol ou sur un établi, le dispositif selon l'invention est soulevé par deux poignées et posé sur deux calles, elles-mêmes posées sur la surface de la culasse à rectifier, puis fixé sur la culasse par quatre bras mobiles. Le système est vérifié puis fixé avant la rectification. la figure 2 montre les différents éléments d'un des quatre bras de serrage. Ce bras est fixé sur un des orifices latéraux de la culasse par une pièce (8) au moyen de deux boulons. Cette pièce pivote sur un axe de la pièce (9) qui présente un taraudage. Dans ce taraudage se visse un axe (10) présentant un filetage droit puis un renflement (il) puis un .filetage gauche qui se visse dans la partie taraudée du bras supérieur. De part et d'autre du renflement, les filetages sont opposés -filetage droit, filetage gauche - Le renflement est percé en un point (12) pour permettre, au moyen d'un petit axe faisant office de clef, de faire tourner l'axe à deux filetages opposés qui, lorsqu'on le tourne dans un sens o dans l'autre, allonge ou racourcit le bras de serrage. Le hau du bras présente un alaisage (13) par lequel passe un ax (14) formant une partie du châssis du dispositif selo l'invention. Sous l 'alaisage, une rainiure permet par une vi la traversant (15) de serrer la partie sur l'axe du châssis d dispositifWhen the cylinder head has been dismantled and placed on the ground or on a workbench, the device according to the invention is lifted by two handles and placed on two calluses, themselves placed on the surface of the cylinder head to be rectified, then fixed on the cylinder head by four movable arms. The system is checked and then fixed before rectification. Figure 2 shows the different elements of one of the four clamping arms. This arm is fixed to one of the lateral orifices of the cylinder head by a part (8) by means of two bolts. This part pivots on an axis of the part (9) which has a thread. In this tapping is screwed an axis (10) having a straight thread then a bulge (it) then a . left thread which screws into the threaded part of the upper arm. On both sides of the bulge, the threads are opposite - right thread, left thread - The bulge is drilled in a point (12) to allow, by means of a small axis acting as a key, to rotate the two axis opposite threads which, when turned in one direction o in the other, lengthens or shortens the clamping arm. The top of the arm has a bore (13) through which passes an axle (14) forming part of the chassis of the device according to the invention. Under the alaisage, a groove allows by a vi through it (15) to tighten the part on the axis of the chassis d device
La figure 3 montre le châssis (16) composé des axes d guidage (17) et des coulisses (18) avec, sur sa largeur, le poignées (7) permettant de porter l'appareil. Le châssis ser sur la longueur d'axes de guidage et de coulisses pour l système porte-outil. Les bras de serrage (3) sont montés su ces axes de guidage sur lesquels ils peuvent coulisser selo la taille de la culasse à rectifier. La vis-mère (19) fai avancer ou reculer l'ensemble porte-outil. Le moteur ave variateur et inverseur (20) entraîne la vis-mère, tandis qu'u autre moteur avec variateur (21) entraîne le porte-outil.Figure 3 shows the frame (16) composed of guide pins (17) and slides (18) with, over its width, the handles (7) for carrying the device. The chassis will be along the length of guide pins and slides for the tool holder system. The clamping arms (3) are mounted on these guide pins on which they can slide according to the size of the cylinder head to be ground. The lead screw (19) moves the tool holder assembly forwards or backwards. The motor with variator and reverser (20) drives the lead screw, while another motor with variator (21) drives the tool holder.
La figure 4 montre un des quatre pieds de longueu réglable (6) qui sont montés sur la largeur du châssis (16 Ils sont constitués de deux parties qui s'emboitent l'une (22) dans l'autre (23) et dont la position est bloquée par une vi (24) . Ces pieds sont terminés par des pastilles de caoutchou (25) . Lorsque l'appareil monté sur une culasse est réglé, o pose les pieds extensibles de façon que ceux-ci touchent l sol ou l'établi sans y porter le poids du dispositif. Il représentent une sécurité et permettent de supprimer le vibrations qui peuvent se produire lors des rectifications Lorsque la culasse est enlevée, ces pieds permettent a dispositif de ne pas reposer sur le porte-outil. La figure 5 montre le dispositif porte-outil avec son systèm permettant de faire monter ou descendre le porte-outil. Dan la pièce (26) se trouve un axe général (27) qui présente u taraudage. Un axe (28) fileté dans sa partie inférieure e enserré par deux roulements permet de faire descendre l'ax général (27) au moyen d'une manivelle (29) fixée sur l'ax fileté (28) . Sous le cylindre solidaire de l'axe général (27) , est maintenu par quatre vis (30) , un plateau (31) coulissant sur les deux coulisses latérales (18) formant le châssis du dispositif .Figure 4 shows one of the four feet of adjustable length (6) which are mounted on the width of the frame (16 They consist of two parts which fit one (22) into the other (23) and whose position is blocked by a vi (24). These feet are terminated by rubber pads (25). When the device mounted on a cylinder head is adjusted, o puts the extendable feet so that they touch the ground or the "established without carrying the weight of the device. They represent a safety and make it possible to suppress the vibrations which can occur during rectifications When the cylinder head is removed, these feet allow the device not to rest on the tool holder. 5 shows the tool holder device with its system allowing the tool holder to be raised or lowered. In the part (26) there is a general axis (27) which has a thread. An axis (28) threaded in its lower part enclosed by two bearings allows to lower endre the general axis (27) by means of a crank (29) fixed on the threaded axis (28). Under the cylinder integral with the general axis (27), is held by four screws (30), a plate (31) sliding on the two lateral slides (18) forming the chassis of the device.
Selon la figure 6 , 1 'axe général (27) est fixé sur une plaque (33) par une vis (34) en son milieu. Cette plaque (33) monte et descend avec précision sur cinq guides (35) . Sur u de ces guides est fixé un comparateur permettant de mesurer les déplacements verticaux du système. Sur le plateau (33) est fixé par vis (36) un système de coulisse qui permet le déplacement latéral du plateau porte-couteau (1) par manivelle (37) sur vis mère (38) .According to Figure 6, one general axis (27) is fixed to a plate (33) by a screw (34) in the middle. This plate (33) goes up and down precisely on five guides (35). On one of these guides is attached a comparator for measuring the vertical displacements of the system. On the plate (33) is fixed by screws (36) a sliding system which allows the lateral movement of the knife-holder plate (1) by crank (37) on mother screw (38).
La figure 7 montre le système de coulisses en trapèze.Figure 7 shows the trapezoid slide system.
Les systèmes permettant les mouvements verticaux,Systems allowing vertical movements,
(fig.5) , et les mouvements latéraux (fig.6 et 7) et le système portant l'outil forment un ensemble glissant sur les guides fixés au châssis. Cet ensemble de systèmes forme un seul bloc posé sur les guides .(fig.5), and the lateral movements (fig.6 and 7) and the tool carrying system form a sliding assembly on the guides fixed to the chassis. This set of systems forms a single block placed on the guides.
Dans la figure 6, dans la boite de roulements (39) , deux roulements enserrent l'axe (40) du plateau porte-outil (1) . Entre la boite de roulements (39) et le plateau porte-outi (1) , une poulie (32) reliée par courroie au moteur muni d'u variateur permet 1 'entrainement du plateau. Le système port un comparateur (4) qui fait office de vérificateur d profondeur, c'est-à-dire qu'il permet d'apprécier l'épaisseur de culasse enlevée. Ce comparateur est gradué en 1/100° d millimètre. La variation de hauteur du porte-outil s'évalu donc en centième de millimètre.In Figure 6, in the bearing box (39), two bearings enclose the axis (40) of the tool holder plate (1). Between the bearing box (39) and the tool holder plate (1), a pulley (32) connected by belt to the motor fitted with a variator allows the drive of the plate. The system carries a comparator (4) which acts as a depth checker, that is to say it makes it possible to assess the thickness of cylinder head removed. This comparator is graduated in 1/100 ° d millimeter. The variation in height of the tool holder is therefore evaluated in hundredths of a millimeter.
La figure 8 montre le plateau porte-outil (en l'occurenc porte-couteau) . Il présente deux réceptacles de porte-outil. Dans ces réceptacles, les porte-outils ont une profondeu d'entrée réglable. Pour équilibrer le plateau porte-outil (1) lors de sa rotation, le plateau porte-outil porte diamétralement opposé au porte-couteau (41) , un porte comparateur (42) présentant sensiblement le même poids qu l'ensemble porte-couteau-couteau. La pièce portant l'outil e celle portant l'axe sur lequel se fixe le comparateur lors de vérifications sont semblables. La profondeur d'entrée des deux pièces (41) et (42) dans le plateau porte-outil se règle selo la largeur de la culasse à rectifier, les deux pièces devan toujours être placées à la même profondeur pour équilibrer l système. Chacune est serrée dans le plateau porte-outil par une vis . Le comparateur contrôle la position du système su la surface de la culasse. Il est aussi gradué au 1/100° d millimètre.Figure 8 shows the tool tray (in this case knife holder). It has two tool holder receptacles. In these receptacles, the tool holders have an adjustable entry depth. To balance the tool-holding plate (1) during its rotation, the tool-carrying plate carries diametrically opposite to the knife-holder (41), a comparator-holder (42) having substantially the same weight as the knife-holder assembly knife. The part carrying the tool e that carrying the axis on which the comparator is fixed during checks are similar. The entry depth of both parts (41) and (42) in the tool holder plate are adjusted according to the width of the cylinder head to be ground, the two parts must always be placed at the same depth to balance the system. Each is clamped in the tool holder plate by a screw. The comparator checks the position of the system on the surface of the cylinder head. It is also graduated to 1/100 ° d millimeter.
Une fois les réglages et derniers serrages effectués, l rectification peut commencer.Le dispositif selon l'inventio concerne tous les garagistes mais aussi tous les ateliers qu ont besoin d'effectuer aisément et rapidement de rectifications de moteurs. Once the adjustments and final tightenings have been made, the rectification can begin. The device according to the invention concerns all garage owners but also all workshops which need to carry out engine corrections easily and quickly.

Claims

REVENDICATIONS
1) Dispositif transportable pour rectifier les culasses de moteurs Diesel ou à essence caractérisé en ce que les bras de fixation fixant le dispositif sur les côtés de la culasse comportent chacun un axe présentant à chaque extrémité un filetage opposé -filetage à droite et filetage à gauche- .1) Transportable device for rectifying cylinder heads of diesel or petrol engines characterized in that the fixing arms fixing the device to the sides of the cylinder head each have an axis having at each end an opposite thread - right-hand thread and left-hand thread -.
2) Dispositif - transportable pour rectifier les culasses de moteurs Diesel ou à essence caractérisé en ce que les guides (35) de précision servent de vérificateurs des profondeurs grâce à un comparateur monté sur l'un d'eux pour apprécier l'épaisseur de culasse à enlever.2) Device - transportable for rectifying cylinder heads of diesel or petrol engines, characterized in that the precision guides (35) serve as depth verifiers by means of a comparator mounted on one of them to assess the thickness of the cylinder head to remove.
3) Dispositif transportable pour rectifier les culasses de moteurs Diesel ou à essence selon la revendication 1 caractérisé en ce que chaque axe à filetage opposé -filetage à droite et filetage à gauche- est vissé en partie à chacune de ses extrémités dans deux pièces en partie taraudées qui portent pour l'une un alaisage (13) permettant au bras de coulisser sur le châssis et pour l'autre les moyens adaptés3) Transportable device for grinding cylinder heads of diesel or petrol engines according to claim 1 characterized in that each axis with opposite thread - right hand thread and left hand thread - is partly screwed at each of its ends in two parts partly threaded which carry for one a bore (13) allowing the arm to slide on the chassis and for the other the adapted means
(8) de se fixer sur les côtés de la culasse.(8) to attach to the sides of the cylinder head.
4) Dispositif transportable pour rectifier les culasses de moteurs Diesel ou à essence selon la revendication 2 caractérisé en ce que selon ces guides de précision descend, au-dessus de la surface à rectifier de la culasse, un plateau porte-outil enserrant, diamétralement opposés sur ce plateau porte-outil, un porte-outil (41) et un porte-comparateur (42) qui permet, lorsque le comparateur est monté, de contrôler la position des quatre coins de la surface à rectifier de la culasse par rapport à la surface balayée par l'outil.4) Transportable device for rectifying the cylinder heads of diesel or petrol engines according to claim 2 characterized in that according to these precision guides descends, above the surface to be rectified of the cylinder head, a clamping tool holder plate, diametrically opposite on this tool holder plate, a tool holder (41) and a comparator holder (42) which allows, when the comparator is mounted, to control the position of the four corners of the surface to be ground of the cylinder head relative to the surface swept by the tool.
5) Dispositif transportable pour rectifier les culasses de moteurs Diesel ou à essence caractérisé en ce que les pieds réglables peuvent -supporter le dispositif lorsque celui-ci est ou non fixé par les bras de fixation sur les côtés de la culasse à rectifier . 5) Transportable device for rectifying the cylinder heads of diesel or petrol engines characterized in that the adjustable feet can -support the device when the latter is or is not fixed by the fixing arms on the sides of the cylinder head to be rectified.
PCT/FR1994/000608 1993-05-25 1994-05-24 Transportable device for grinding motor vehicle cylinder heads WO1994027779A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP94917048A EP0684888A1 (en) 1993-05-25 1994-05-24 Transportable device for grinding motor vehicle cylinder heads
AU68499/94A AU6849994A (en) 1993-05-25 1994-05-24 Transportable device for grinding motor vehicle cylinder heads

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR93/06542 1993-05-25
FR9306542A FR2705604B1 (en) 1993-05-25 1993-05-25 Transportable device for grinding cylinder heads.

Publications (2)

Publication Number Publication Date
WO1994027779A3 WO1994027779A3 (en) 1994-12-08
WO1994027779A2 true WO1994027779A2 (en) 1994-12-08

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Country Status (4)

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EP (1) EP0684888A1 (en)
AU (1) AU6849994A (en)
FR (1) FR2705604B1 (en)
WO (1) WO1994027779A2 (en)

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FR3099889A1 (en) * 2019-08-16 2021-02-19 Christian Dupuis Abrasive tool holder for surfacing
CN113714884A (en) * 2021-09-02 2021-11-30 天津广荟丰科技有限公司 Prevent fold mark polymer new material surface treatment equipment

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CN112008633B (en) * 2020-09-01 2022-04-19 常德市佳鸿机械有限责任公司 Cylinder hole processing and positioning device for engine cylinder block
CN112847216B (en) * 2021-01-07 2023-03-21 中车资阳机车有限公司 Diesel locomotive hand brake assembling method

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AU6849994A (en) 1994-12-20
EP0684888A1 (en) 1995-12-06
FR2705604A1 (en) 1994-12-02
FR2705604B1 (en) 1998-07-03

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