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FR2538278A1 - Method of producing the bearing of a metal device and mould intended for its implementation - Google Patents

Method of producing the bearing of a metal device and mould intended for its implementation Download PDF

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Publication number
FR2538278A1
FR2538278A1 FR8221847A FR8221847A FR2538278A1 FR 2538278 A1 FR2538278 A1 FR 2538278A1 FR 8221847 A FR8221847 A FR 8221847A FR 8221847 A FR8221847 A FR 8221847A FR 2538278 A1 FR2538278 A1 FR 2538278A1
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FR
France
Prior art keywords
bore
bearing
recess
pinion
producing
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
FR8221847A
Other languages
French (fr)
Other versions
FR2538278B1 (en
Inventor
Alfred Bruno Mazzorana
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.)
Societe de Paris et du Rhone SA
Original Assignee
Societe de Paris et du Rhone 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 Societe de Paris et du Rhone SA filed Critical Societe de Paris et du Rhone SA
Priority to FR8221847A priority Critical patent/FR2538278B1/en
Publication of FR2538278A1 publication Critical patent/FR2538278A1/en
Application granted granted Critical
Publication of FR2538278B1 publication Critical patent/FR2538278B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/14—Special methods of manufacture; Running-in
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The method consists in the in-situ sintering of the bearing 4 inside the pinion 1 which constitutes a part of the production mould 6. This mould comprises a recess 8 in which is centred the outside of the track 3 of the pinion, the concentricity between this recessing and the periphery of a central pin 9 alone intervening in order to determine that between the bore of the bearing 4 and the periphery of the track 3. Starter booster for heat engine.

Description

On sait qu'un grand nombre d'organes mécaniques comportent un coussinet interne destiné à permettre notamment leur rotation sans grippage autour d'un axe fixe. On ne reviendra pas sur la nécessité de ces coussinets dont le coefficient de frottement est meilleur que celui de la matière constitutive de l'organe auquel ils sont associés. It is known that a large number of mechanical members include an internal bearing intended in particular to allow their rotation without seizing around a fixed axis. We will not return to the need for these bearings whose friction coefficient is better than that of the constituent material of the organ with which they are associated.

Les coussinets du genre en question sont soit fabriqués séparément, puis emmanches à force dans un alésage ménagé dans ledit organe, soit obtenus par frittage.The bearings of the kind in question are either manufactured separately, then force-fitted into a bore formed in said member, or obtained by sintering.

Si l'on veut obtenir une concentricité parfaite entre l'alésage du coussinet et la périphérie de l'organe, il est nécessaire que le pourtour du coussinet, l'alésage de organe et la périphérie de celui-ci soient parfaitement concentriques d'une part et d'autre part qu'ils soient réalisés à des dimensions très précises pour que la superposition des tolérances d'usinage des deux éléments considérés reste dans des limites acceptables. La plupart du temps d'ailleurs, l'alésage du coussinet est rectifié après sa mise en place, de maniere que la périphérie de l'organe et l'alésage du coussinet soient parfaitement conccentriques. On comprend parfaitement qu'une telle méthode de fabrication ne soit pas économique. If it is desired to obtain perfect concentricity between the bore of the bearing and the periphery of the member, it is necessary that the periphery of the bearing, the bore of the member and the periphery thereof be perfectly concentric with a on the other hand that they are made to very precise dimensions so that the superposition of the machining tolerances of the two elements considered remains within acceptable limits. Most of the time, moreover, the bore of the bearing is rectified after its installation, so that the periphery of the member and the bore of the bearing are perfectly concentric. It is perfectly understood that such a manufacturing method is not economical.

Les perfectionnements qui font l'objet de la présente invention visent à remédier à cet inconvénient et à permettre la realisation d"un coussinet fritte in-situ dans l'organe mécanique. Il devient des lors possible d'obtenir une tolérance très réduite entre l'alésage du coussinet et la périphérie de l'organe mécanique, cette tolérance étant à peu près égale à celle qu'on rencontre lors de l'obtention du coussinet à l'état isolé. L'usinage de l'alésage de l'organe peut être effectué avec une tolérance très large et un état de surface grossier, de telle sorte qu'il n'entratne pas des coûts de fabrication élevés. The improvements which are the subject of the present invention aim to remedy this drawback and to allow the production of a sintered bearing in situ in the mechanical member. It therefore becomes possible to obtain a very reduced tolerance between the the bore of the bearing and the periphery of the mechanical member, this tolerance being approximately equal to that encountered when obtaining the bearing in the isolated state. can be carried out with a very wide tolerance and a rough surface state, so that it does not entail high manufacturing costs.

Le procédé suivant l'invention consiste à fritter le coussinet en utilisant l'organe auquel il doit être associe au moins comme partie du moule de frittage. Ce moule comprend un chambrage annulaire réalisé dans une matrice de manière que la paroi latérale de ce chambrage corresponde au profil du pourtour d'au moins unepartie de l'organe, tandis que son alésage détermine avec un goujon central de la matrice une chambre tubulaire dans laquelle on vient comprimer une poudre destinée à constituer un coussinet. The method according to the invention consists in sintering the bearing using the member with which it must be associated at least as part of the sintering mold. This mold comprises an annular recess produced in a matrix so that the side wall of this recess corresponds to the profile of the periphery of at least one part of the member, while its bore determines with a central stud of the matrix a tubular chamber in which we just compress a powder intended to constitute a pad.

On comprend que l'application du procédé suivant l'invention est particulièrement intéressante lorsqu'il s'agit de fabriquer un pignon de lanceur de démarreur électrique, pignon qui doit presenter entre l'alésage de son coussinet et la périphérie de sa piste une excellente concentricité.  It is understood that the application of the method according to the invention is particularly advantageous when it is a question of manufacturing an electric starter starter pinion, a pinion which must have between the bore of its bearing and the periphery of its track an excellent concentricity.

Le dessin annexe, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer
Fig. 1 est une vue éclatez en coupe-du pignon d'un lanceur de démarreur pour moteur thermique.The accompanying drawing, given by way of example, will make it possible to better understand the invention, the characteristics which it presents and the advantages which it is likely to provide.
Fig. 1 is an exploded view in section of the pinion of a starter launcher for a heat engine.

Fig. 2 est une coupe longitudinale d'un moule destiné à la mise en oeuvre du procédé suivant l'invention. Fig. 2 is a longitudinal section of a mold intended for the implementation of the method according to the invention.

On a illustre en fig. 1 un pignon 1 de lanceur de démarreur pour moteur thermique comprenant une denture 2 et une piste 3 qui fait partie d'un dispositif de roue libre, de telle sorte qu'elle doit être parfaitement concentrique avec l'alésage 4a d'un coussinet 4 destiné à etre engagé à force dans la perforation longitudinale 5 du pignon 1. We have illustrated in fig. 1 a pinion 1 of a starter launcher for a heat engine comprising a toothing 2 and a track 3 which is part of a freewheel device, so that it must be perfectly concentric with the bore 4a of a bearing 4 intended to be forcibly engaged in the longitudinal perforation 5 of the pinion 1.

Conformément à l'invention, le coussinet 5 est directement comprime dans le pignon 1 dont la perforation centrale 5 constitue une partie du moule. Ainsi, comme explique plus haut, on est assure d'obtenir une bonne concentricité entre l'alésage 4a et la périphérie de la piste 3. According to the invention, the bearing 5 is directly compressed in the pinion 1, the central perforation 5 of which forms part of the mold. Thus, as explained above, it is ensured that good concentricity is obtained between the bore 4a and the periphery of the track 3.

Pour la mise en oeuvre du procédé de frittage in-situ, on utilise un moule 6 (fig. 2) dont la matrice 7 comprend un chambrage 8 au centre duquel se dresse un goujon 9 qui s'entend au-dela du débouché de ce chambrage. Une plaque 10 le ferme, son centre e tant pourvu d'un alésage lOa de diamètre égal à celui de l'alésage 5 du pignon 1 qui est engagé dans le chambrage 8. A cet effet3 le diamètre de ce dernier correspond au jeu près à celui de la piste 3, de telle sorte que 9e pignon se centre autour du goujon 9 pour déterminer une chambre tubulaire 11. For the implementation of the in-situ sintering process, a mold 6 (fig. 2) is used, the matrix 7 of which includes a recess 8 in the center of which stands a stud 9 which is understood beyond the outlet of this chambering. A plate 10 closes it, its center e being provided with a bore lOa of diameter equal to that of the bore 5 of the pinion 1 which is engaged in the recess 8. For this purpose3 the diameter of the latter corresponds to the play close to that of track 3, so that the 9th pinion centers around the stud 9 to determine a tubular chamber 11.

les tolérances de fabrication du goujon 9 et du chambrage 8 sont prévues sufisawment serrées pour que la concentricité entre la périphérie du goujon 9 et la face latérale du chambrage 8 se situe à l'intérieur d'une fourchette étroite de tolérances déterminée par la précision désirée de la concentricite. Autrement dit, la concentricité du goujon central 9 et du chambrage 8 entre seule en jeu pour déterminer celle entre l'alésage 4a du coussinet 4 et le pourtour de la piste 3. Une poudre frittable est ensuite déversée dans la chambre tubulaire 11 et dans l'espace situé entre l'alésage lOa de la plaque 10 et le goujon 9. the manufacturing tolerances of the stud 9 and the recess 8 are sufficiently tightened so that the concentricity between the periphery of the stud 9 and the lateral face of the recess 8 lies within a narrow range of tolerances determined by the desired precision of concentricity. In other words, the concentricity of the central stud 9 and the recess 8 comes into play alone to determine that between the bore 4a of the bearing 4 and the periphery of the track 3. A sinterable powder is then poured into the tubular chamber 11 and into the space between the bore 10a of the plate 10 and the stud 9.

Puis un piston tubulaire 12 qui s'engage à jeu réduit autour du goujon 9 est déplacé en direction du pignon 1 dans le sens de la flèche F de manière à comprimer la poudre qui en s'agglomérant constitue le coussinet 4. On observe la présence d'une lunette 13 qui coulisse sur le goujon 9 en vue d'éjecter le pignon après compression du coussinet 4. Le pignon muni de son coussinet est ensuite place dans un four en vue d'effectuer l'opération de frittage du coussinet.Then a tubular piston 12 which engages with reduced clearance around the stud 9 is moved in the direction of the pinion 1 in the direction of the arrow F so as to compress the powder which, by agglomerating, constitutes the pad 4. The presence is observed a bezel 13 which slides on the stud 9 in order to eject the pinion after compression of the pad 4. The pinion provided with its pad is then placed in an oven in order to effect the sintering operation of the pad.

On a ainsi réalisé un pignon coussinet fritté dont la mise en oeuvre évite la superposition des tolérances des deux eléments qui le constituent. A sintered bearing pinion has thus been produced, the implementation of which avoids the superimposition of the tolerances of the two elements which constitute it.

Il doit d'ailleurs etre entendu que la description qui précède n'a été donnée qu'a titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents.  It should also be understood that the foregoing description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents.

Claims (5)

R E V E N D I C A T I O N SR E V E N D I C A T I O N S 1. Procédé de réalisation du coussinet (4) d'un organe (1), caractérisE en ce qu'il consiste à comprimer le coussinet (4) en utilisant ledit organe (1) comme au moins une partie du moule de compression (6). 1. Method for producing the pad (4) of a member (1), characterized in that it consists in compressing the pad (4) using said member (1) as at least part of the compression mold (6 ). 2. Procédé suivant la revendication 1, caracterisé en ce qu'il consiste à réaliser un chambrage annulaire (8) dans une matrice (7) de manière que la face latérale de ce chambrage (8) corresponde au profil d'au moins une partie (3) de l'organe (1), tandis que son alésage (5) détermine avec la partie centrale (9) de la matrice (7) une chambre tubulaire (11), et a fritter une matière appropriée dans ladite chambre (11) afin qu'elle se solidarise avec l'alesage (5) de l'organe (1). 2. Method according to claim 1, characterized in that it consists in producing an annular recess (8) in a matrix (7) so that the lateral face of this recess (8) corresponds to the profile of at least part (3) of the member (1), while its bore (5) determines with the central part (9) of the matrix (7) a tubular chamber (11), and has sintering a suitable material in said chamber (11 ) so that it becomes integral with the bore (5) of the member (1). 3. Moule pour la mise en oeuvre du procède suivant la revendication 2, caracterise en ce qu'il comprend une matrice (7) dans laquelle est ménagE un chambrage (8) dont le centre est occupé par un goujon (9) dépassant au-dela du débouché dudit chambrage et qui est partiellement obturé par une plaque, et un piston tubulaire (12) qui traverse la plaque (10) pour assurer le frittage en coulissant par rapport audit goujon (9). 3. Mold for the implementation of the method according to claim 2, characterized in that it comprises a matrix (7) in which is formed a recess (8) whose center is occupied by a stud (9) protruding beyond the opening of said recess and which is partially closed by a plate, and a tubular piston (12) which passes through the plate (10) to ensure sintering by sliding with respect to said stud (9). 4. Moule suivant la revendication 3, caractérisé en ce que la plaque (10) est pourvue d'un alésage (lOa > de diamètre égal à celui (5) de organe (1). 4. Mold according to claim 3, characterized in that the plate (10) is provided with a bore (lOa> of diameter equal to that (5) of member (1). 5. Pignon de lanceur de démarreur thermique, caractérisé en ce qu'il est établi par mise en oeuvre du procédé suivant l'une quelconque des revendications 1 et 2 et grace à un moule suivant l'une quelconque des revendications 3 et 4.  5. Thermal starter launcher pinion, characterized in that it is established by implementing the method according to any one of claims 1 and 2 and by means of a mold according to any one of claims 3 and 4.
FR8221847A 1982-12-23 1982-12-23 PROCESS FOR PRODUCING THE PAD OF A METAL MEMBER AND MOLD FOR ITS IMPLEMENTATION Expired FR2538278B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8221847A FR2538278B1 (en) 1982-12-23 1982-12-23 PROCESS FOR PRODUCING THE PAD OF A METAL MEMBER AND MOLD FOR ITS IMPLEMENTATION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8221847A FR2538278B1 (en) 1982-12-23 1982-12-23 PROCESS FOR PRODUCING THE PAD OF A METAL MEMBER AND MOLD FOR ITS IMPLEMENTATION

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FR2538278A1 true FR2538278A1 (en) 1984-06-29
FR2538278B1 FR2538278B1 (en) 1985-08-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381499A2 (en) * 1989-02-03 1990-08-08 Danly International, S.A. Composite and self-lubricating bushing
US5094548A (en) * 1989-02-03 1992-03-10 Danly Corporation Composite and self-lubricating bushing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374747A (en) * 1942-03-09 1945-05-01 Hardy Metallurg Company Method of making tubular bearings
FR1464249A (en) * 1964-12-18 1966-12-30 Siemens Ag Method and device for producing metallic coating layers on solid bodies
US4172395A (en) * 1978-08-07 1979-10-30 Dresser Industries, Inc. Method of manufacturing a rotary rock bit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374747A (en) * 1942-03-09 1945-05-01 Hardy Metallurg Company Method of making tubular bearings
FR1464249A (en) * 1964-12-18 1966-12-30 Siemens Ag Method and device for producing metallic coating layers on solid bodies
US4172395A (en) * 1978-08-07 1979-10-30 Dresser Industries, Inc. Method of manufacturing a rotary rock bit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381499A2 (en) * 1989-02-03 1990-08-08 Danly International, S.A. Composite and self-lubricating bushing
EP0381499A3 (en) * 1989-02-03 1990-11-14 Danly International, S.A. Composite and self-lubricating bushing
US5094548A (en) * 1989-02-03 1992-03-10 Danly Corporation Composite and self-lubricating bushing

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Publication number Publication date
FR2538278B1 (en) 1985-08-30

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