US3867093A - Heat treating apparatus - Google Patents

Heat treating apparatus Download PDF

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Publication number
US3867093A
US3867093A US402046A US40204673A US3867093A US 3867093 A US3867093 A US 3867093A US 402046 A US402046 A US 402046A US 40204673 A US40204673 A US 40204673A US 3867093 A US3867093 A US 3867093A
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US
United States
Prior art keywords
component surfaces
hearth
ram
workpieces
cover
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 - Lifetime
Application number
US402046A
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English (en)
Inventor
Bernhard Huttermann
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.)
Federal Mogul Bremsbelag GmbH
Original Assignee
Jurid Werke GmbH
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 Jurid Werke GmbH filed Critical Jurid Werke GmbH
Application granted granted Critical
Publication of US3867093A publication Critical patent/US3867093A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/003—Apparatus, e.g. furnaces
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/663—Bell-type furnaces
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/045—Bonding
    • F16D2069/0458—Bonding metallurgic, e.g. welding, brazing, sintering
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/0491—Tools, machines, processes

Definitions

  • An apparatus for simultaneously treating platelike workpieces with heat and pressure comprises a hearth in which a table means and a cover member define a chamber provided with heating means.
  • the hearth is equipped with means for generating a ram pressure and besides with special means for ensuring that work pieces put on the table means and forming thereon stacks of different heights will be affected by substantially equal ram pressure acting from below of the movably mounted table means.
  • the invention relates to apparatus for heat treating machine parts of substantially platelike form with simultaneous application of ram pressure.
  • Apparatus of such a kind is frequently used for sintered powder-metallurgically prepared plates for clutches or brakes, ram pressure being appliedto the stacked parts during the heat treatment for sintering the friction lining material to the backing plates.
  • Conventional apparatus comprises a hearth providing a surface for the reception of the material that is to be treated, a vault covering the hearth to which it is anchored and being provided with heating means, the pressure being generated by the hearth surface and/or the vault being mechanically or hydraulically moved closer together.
  • a hood which stands in an oil trough forming a seal is provided between the hearth and the vault to enable sintering to proceed in a protective gas atmosphere.
  • the size of the plates that are to be sintered is within a diameter of 1000 mm, but plates of a diameter exceeding 500 mm are too rare to justify the installation of pressure sintering furnaces having hearths of appropriate size merely for dealing with these larger sized plates only. Therefore loarger sized furnaces are used also for simultaneously sintering several stacks of smaller diameter plates. In order to prevent the application of pressure to be too unevenly divided preferably no more than three stacks of parts are treated in one furnace at the same time.
  • this is achieved in apparatus of the specified kind by dividing the hearth surface into component surfaces which are independently movable by associated members of the pressure generating means.
  • a useful embodiment of the proposed heat treating apparatus also comprises coupling means which permit individual component surfaces of the hearth to be moved jointly with one or more or all of the others.
  • This proposal enables parts that are to be sintered to be arranged in stacks of different heights on the several component surfaces of the hearth and each to be subjected to controllable pressure independently of the others, or alternatively several or all the component surfaces can be used jointly in combination should this be desired.
  • FIG. 1 is a conventional pressure sintering furnace.
  • FIG. 2 is a pressure sintering furnace according to the invention
  • FIG. 3 is a view from above of the hearth of a furnace according to the invention.
  • FIG. 4 is a side elevation of the component parts of a hearth and of a coupling means in a furnace according to the invention.
  • FIG. 5 is a view of the arrangement in FIG. 4, seen in plan.
  • FIG. 1 is a representation of a conventional pressure sintering furnace comprising a hearth 11 supporting a hearth plate 12 under a vault 13 which can be anchored to the hearth, and which is equipped with heating means 14.
  • the hearth plate 12 carries several stacks 16 of maching parts that are to be sintered. The stacks are enclosed within a protective hood 17, an immersion oil seal 18 preventing the ambient atmosphere from gaining access.
  • the hearth plate 12 can be forced by a pressure generating means 15, such as a hydraulic cylinder and piston, to move towards the roof of the vault 13 and to compress the stacks 16.
  • FIG. 23 is a hearth 21 and a furnace vault 22 equipped with heating means 23.
  • the supporting surface on the hearth 21 (refer also top FIG. 3) comprises several hearth plates 241, 242, 243, 244.
  • the hearth plates 241 to 244 are each independently movable by a separate hydraulic pressure generator 251.
  • a hood 27 for a protective gas and an oil seal 28 are also provided.
  • the hearth plates 241, 242, 243, 244 in one embodiment of the proposed equipment are quadrants of a circle.
  • the hearth surface may also be divided in other ways and the component plates may have alternative geometrical shapes, for example squares or rectangles.
  • stacks 261 of varying initial heights can be trated in equipment according to the invention by the interposition of packing members 262 for equalising the heights of the stacks 261.
  • FIGS. 4 and 5 demonstrate how the component plates of the hearth can be coupled together by coupling means 245 when the machine parts 263 which project beyond the contours of an individual component hearth plate are to be treated.
  • coupling means 245 For coupling several of the hearth plates together so that they can be used as one plate they are covered with a coupling plate 245 which rigidly joins them together. Fins 246 which project from the coupling plate fit into the clearance gaps between the component plates and ensure not only that the coupling plate 245 will be reliably located, but also that the rigidity of the plate and the rigidity of the coupling will be improved.
  • the weight of the parts 263 forming a stack, as indicated at 261 plus that of the coupling plate 245 is sufficient to prevent unequal movements of the several component hearth plates due to differential frictional resistance in the pressure generating units 251.
  • such coupling plates provide a flat unbroken surface which prevents the workpieces at the bottom of the stacks from being damaged.
  • An apparatus for simultaneously treating substantially plate-shaped workpieces with heat and pressure comprising:
  • a hearth having surface means for the reception of workpieces to be treated, and cover means defining together with said surface means a treatment chamber;
  • said cover means having a portion extending substantially in parallel to, but spaced apart from said surface means;
  • ram means in cooperating relation with said surface means for moving said surface means under pressure in a'direction towards said portion of said cover means and into said chamber to press the workpieces thereon against said cover means;
  • said surface means comprising a plurality of component surfaces and said ram means having an equal plurality of ram members;
  • each of said component surfaces being mounted in said hearth for independent movement by an associated one of said ram members;
  • coupling means for releasably interconnecting at least two component surfaces of said plurality of component surfaces, said interconnected component surfaces being uniformly movable by their associated members.
  • each of said component surfaces being mounted in said hearth for independent movement by an associated one of said ram members
  • said cover means including packing means, located above at least one of said component surfaces, for reducing the dimension of the treatment chamber in the direction of the movement of said surface means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Powder Metallurgy (AREA)
  • Tunnel Furnaces (AREA)
US402046A 1972-10-05 1973-10-01 Heat treating apparatus Expired - Lifetime US3867093A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2249194A DE2249194C3 (de) 1972-10-05 1972-10-05 Vorrichtung zum Drucksintern plattenförmiger Teile

Publications (1)

Publication Number Publication Date
US3867093A true US3867093A (en) 1975-02-18

Family

ID=5858403

Family Applications (1)

Application Number Title Priority Date Filing Date
US402046A Expired - Lifetime US3867093A (en) 1972-10-05 1973-10-01 Heat treating apparatus

Country Status (6)

Country Link
US (1) US3867093A (enrdf_load_stackoverflow)
JP (1) JPS4973311A (enrdf_load_stackoverflow)
DE (1) DE2249194C3 (enrdf_load_stackoverflow)
FR (1) FR2202582A5 (enrdf_load_stackoverflow)
GB (1) GB1406198A (enrdf_load_stackoverflow)
IT (1) IT995500B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504221A (en) * 1982-02-12 1985-03-12 Entreprise Hartmann Pere Et Fils Tunnel oven and wagon
US4610628A (en) * 1983-12-28 1986-09-09 Denkoh Co., Ltd. Vertical furnace for heat-treating semiconductor
US4689008A (en) * 1985-03-11 1987-08-25 Hailey Robert W Heating and handling system for metal consolidation process
US4790750A (en) * 1986-02-12 1988-12-13 Stein Heurtey Automated flexible installation for a rapid thermochemical treatment
US4828490A (en) * 1986-06-12 1989-05-09 Baruch Indig Furnace for dental workpieces
US5066223A (en) * 1990-07-13 1991-11-19 Leybold Aktiengesellschaft Melting and casting furnace
US5561088A (en) * 1994-02-10 1996-10-01 Sony Corporation Heating method and manufacturing method for semiconductor device
US6210158B1 (en) * 1996-03-22 2001-04-03 Murata Manufacturing Co., Ltd. Method and apparatus for firing ceramic compact
US6559425B2 (en) * 1999-09-03 2003-05-06 Alliedsignal Bremsbelag Gmbh Method and a device for the thermal treatment of friction lining surfaces
US20070141523A1 (en) * 2005-12-19 2007-06-21 Ye-Long Su Sintering furnace for pipe fittings
US20120085752A1 (en) * 2009-03-24 2012-04-12 Freni Brembo S.P.A. Induction Furnace and Infiltration Process
KR101438787B1 (ko) * 2012-09-04 2014-09-05 한국생산기술연구원 유도가열을 이용한 다이아몬드공구 제조장치 및 방법

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645624A (en) * 1982-08-30 1987-02-24 Australian Atomic Energy Commission Containment and densification of particulate material
JPH0736168Y2 (ja) * 1989-05-01 1995-08-16 曙ブレーキ工業株式会社 デイスクパツド加熱用治具

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US177487A (en) * 1876-05-16 Improvement in the manufacture of straw-boards
US508112A (en) * 1893-11-07 Apparatus for drying substances
US1549823A (en) * 1920-12-01 1925-08-18 Gen Motors Corp Heating furnace
US1734901A (en) * 1926-05-10 1929-11-05 Stanley S Gerrie Press for paper tablets
US2454253A (en) * 1947-01-25 1948-11-16 Selas Corp Of America Method of and apparatus for heating stacked bodies
US2671160A (en) * 1952-06-13 1954-03-02 Gen Engineering Company Canada Method and apparatus for heating stacked plates
US3456581A (en) * 1966-03-29 1969-07-22 Zuber Karl Bleistiftmasch Devices for drying glued pencil blanks

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US177487A (en) * 1876-05-16 Improvement in the manufacture of straw-boards
US508112A (en) * 1893-11-07 Apparatus for drying substances
US1549823A (en) * 1920-12-01 1925-08-18 Gen Motors Corp Heating furnace
US1734901A (en) * 1926-05-10 1929-11-05 Stanley S Gerrie Press for paper tablets
US2454253A (en) * 1947-01-25 1948-11-16 Selas Corp Of America Method of and apparatus for heating stacked bodies
US2671160A (en) * 1952-06-13 1954-03-02 Gen Engineering Company Canada Method and apparatus for heating stacked plates
US3456581A (en) * 1966-03-29 1969-07-22 Zuber Karl Bleistiftmasch Devices for drying glued pencil blanks

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504221A (en) * 1982-02-12 1985-03-12 Entreprise Hartmann Pere Et Fils Tunnel oven and wagon
US4610628A (en) * 1983-12-28 1986-09-09 Denkoh Co., Ltd. Vertical furnace for heat-treating semiconductor
US4689008A (en) * 1985-03-11 1987-08-25 Hailey Robert W Heating and handling system for metal consolidation process
US4790750A (en) * 1986-02-12 1988-12-13 Stein Heurtey Automated flexible installation for a rapid thermochemical treatment
US4828490A (en) * 1986-06-12 1989-05-09 Baruch Indig Furnace for dental workpieces
US5066223A (en) * 1990-07-13 1991-11-19 Leybold Aktiengesellschaft Melting and casting furnace
US5561088A (en) * 1994-02-10 1996-10-01 Sony Corporation Heating method and manufacturing method for semiconductor device
US6210158B1 (en) * 1996-03-22 2001-04-03 Murata Manufacturing Co., Ltd. Method and apparatus for firing ceramic compact
US6559425B2 (en) * 1999-09-03 2003-05-06 Alliedsignal Bremsbelag Gmbh Method and a device for the thermal treatment of friction lining surfaces
US20070141523A1 (en) * 2005-12-19 2007-06-21 Ye-Long Su Sintering furnace for pipe fittings
US20120085752A1 (en) * 2009-03-24 2012-04-12 Freni Brembo S.P.A. Induction Furnace and Infiltration Process
KR101438787B1 (ko) * 2012-09-04 2014-09-05 한국생산기술연구원 유도가열을 이용한 다이아몬드공구 제조장치 및 방법

Also Published As

Publication number Publication date
FR2202582A5 (enrdf_load_stackoverflow) 1974-05-03
JPS4973311A (enrdf_load_stackoverflow) 1974-07-16
DE2249194C3 (de) 1975-07-24
IT995500B (it) 1975-11-10
GB1406198A (en) 1975-09-17
DE2249194A1 (de) 1974-04-18
DE2249194B2 (de) 1974-12-12

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