EP0050576B1 - Outillage pour la fabrication de pièces frittées à surfaces hélicoidales - Google Patents

Outillage pour la fabrication de pièces frittées à surfaces hélicoidales Download PDF

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Publication number
EP0050576B1
EP0050576B1 EP81420135A EP81420135A EP0050576B1 EP 0050576 B1 EP0050576 B1 EP 0050576B1 EP 81420135 A EP81420135 A EP 81420135A EP 81420135 A EP81420135 A EP 81420135A EP 0050576 B1 EP0050576 B1 EP 0050576B1
Authority
EP
European Patent Office
Prior art keywords
helicoidal
members
punch
press
rotation
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.)
Expired
Application number
EP81420135A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0050576A1 (fr
Inventor
Henri Gueydan
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.)
Alliages Frittes Metafram
Original Assignee
Alliages Frittes Metafram
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 Alliages Frittes Metafram filed Critical Alliages Frittes Metafram
Priority to AT81420135T priority Critical patent/ATE12467T1/de
Publication of EP0050576A1 publication Critical patent/EP0050576A1/fr
Application granted granted Critical
Publication of EP0050576B1 publication Critical patent/EP0050576B1/fr
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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • B22F5/085—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs with helical contours
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

  • the invention relates to a tool for making parts with helical surfaces, made of sintered materials.
  • the punch (s) moves (s) along the helix axis while undergoing around this axis, a rotation proportional to their advance, depending on the not the propeller considered.
  • the punches are controlled in rotation as a function of their advance, positively, by two long chains kinematics, complex and bulky.
  • These include, among others, many helical gears (F / F). (11-12), (12-3), (27-30), (29-25), intended to impose a predetermined step when advancing the punch (s).
  • the Applicant's invention eliminates all of these drawbacks. It provides an elegant solution to the problem of mass production of a large number of parts (for example, 10,000), with a helical surface, with high reliability, low cost price and high productivity.
  • the invention relates to a tool for manufacturing sintered parts with helical surfaces using a press provided with two plates, comprising, as is known, a matrix of helical internal surface mounted in a hoop secured to the press as well as two punches lower and upper provided at their end with helical surfaces which engage in the corresponding helical surfaces of the matrix.
  • the punch head (s) rests on the press plate (s) by means of a stopper (s) axial (s) hydraulic (s) (B), which allows its (or their) free rotation around its (their) axis which is also that of the helical surfaces.
  • the die (1) whose internal profile (2) is helical, is mounted in a hoop (3) integral with the press (P).
  • the matrix is closed at its lower part by the top of the punch (4), whose helical external profile (5) corresponds to that of the matrix (2).
  • the lower punch (4) is also provided with a core (6) to form the bore of the pinion.
  • the powder to be compressed (7) is placed in the annular space between the core and the matrix.
  • the lower punch (4) is fixed to the lower hydraulic stop.
  • the upper punch (4 '), similar in structure to the lower punch, is fixed to the upper hydraulic stop.
  • the cylinder (10) rests on one of the plates (21), mobile or fixed, of the press (P).
  • the upper punch (4) is, in addition, secured, by means of screws (20) of two positioning arms (14), which are supported, under the action of a small jack (not shown) exerting force F, on an adjustable mechanical stop (15), consisting of a screw (16) and a lock nut (17).
  • the purpose of this is to allow the upper punch (4 ') to be positioned exactly for its precise engagement in the die (1) when they come into contact, without any risk of deterioration.
  • the cylinder (10) is closed by a cover (18) which rests on the piston (11) by means of a ball bearing (19).
  • the head (8) of the upper punch (4 ') (the diameters of which are variable) is centered in the recess (22) of the piston (11) using appropriate annular spacers (9).
  • the device is used either for the compression of the powders before sintering, or for the cold calibration of the parts after sintering (in the case of ductile materials), or for both operations.
  • One of the punches in general the lower punch, is also used as an ejector at the end of the compression cycle by means of a relative (upward) movement relative to the die.
  • this device is the manufacture of simple helical pinions.
  • the device can also be used for the manufacture of parts comprising two distinct helical surfaces such as chevron gears, the axes and the helical pitches of each of the surfaces possibly being different; this requires, however, a known adaptation of the matrix (in two parts).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Crushing And Grinding (AREA)
  • Forging (AREA)
  • Gears, Cams (AREA)
  • Gear Transmission (AREA)
EP81420135A 1980-09-22 1981-09-21 Outillage pour la fabrication de pièces frittées à surfaces hélicoidales Expired EP0050576B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81420135T ATE12467T1 (de) 1980-09-22 1981-09-21 Werkzeug fuer die herstellung gesinterter werkstuecke mit schraubenfoermigen oberflaechen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8020549A FR2490515B1 (enrdf_load_stackoverflow) 1980-09-22 1980-09-22
FR8020549 1980-09-22

Publications (2)

Publication Number Publication Date
EP0050576A1 EP0050576A1 (fr) 1982-04-28
EP0050576B1 true EP0050576B1 (fr) 1985-04-03

Family

ID=9246262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81420135A Expired EP0050576B1 (fr) 1980-09-22 1981-09-21 Outillage pour la fabrication de pièces frittées à surfaces hélicoidales

Country Status (5)

Country Link
EP (1) EP0050576B1 (enrdf_load_stackoverflow)
AT (1) ATE12467T1 (enrdf_load_stackoverflow)
DE (1) DE3169700D1 (enrdf_load_stackoverflow)
ES (1) ES8303154A1 (enrdf_load_stackoverflow)
FR (1) FR2490515B1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2607040B1 (fr) * 1986-11-21 1989-09-15 Renault Procede et outillage de fabrication par frittage-forgeage de pieces mecaniques a denture helicoidale
DE3718884C2 (de) * 1987-06-05 1994-05-11 Forschungsges Umformtechnik Vorrichtung zum Herstellen von schrägverzahnten Werkstücken aus Metall, vorzugsweise Stahl
SE467241B (sv) * 1990-06-01 1992-06-22 Sandvik Ab Foerfarande foer vaegning av metallinnehaall i ett kaerl i en anlaeggning foer gjutning
JPH04136107A (ja) * 1990-09-25 1992-05-11 Sumitomo Electric Ind Ltd 焼結斜歯歯車の成形装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1226889A (enrdf_load_stackoverflow) * 1969-02-01 1971-03-31
SU357788A1 (ru) * 1971-04-26 1976-09-05 Харьковский авиационный институт Машина дл прессовани изделий
ZA722167B (en) * 1972-03-29 1973-11-28 African Explosives & Chem Improvements in presses

Also Published As

Publication number Publication date
ES505646A0 (es) 1983-02-01
ES8303154A1 (es) 1983-02-01
FR2490515A1 (enrdf_load_stackoverflow) 1982-03-26
EP0050576A1 (fr) 1982-04-28
DE3169700D1 (en) 1985-05-09
FR2490515B1 (enrdf_load_stackoverflow) 1982-09-03
ATE12467T1 (de) 1985-04-15

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