US3867093A - Heat treating apparatus - Google Patents
Heat treating apparatus Download PDFInfo
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- 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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- United States
- Prior art keywords
- component surfaces
- hearth
- ram
- workpieces
- cover
- Prior art date
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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.
Abstract
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 workpieces 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.
Description
United States Patent [191 Huttermann [4 1 Feb. 18,1975
1 1 HEAT TREATING APPARATUS Inventor: Bernhard Huttermann,Glinde,
Germany [73] Assignee: Jurid Werke GmbH, Glinde,
Germany [22] Filed: Oct. 1, 1973 [21] Appl. No: 402,046
[30] Foreign Application Priority Data [5 6] References Cited UNITED STATES PATENTS 177,487 5/1876 Field 34/144 508,112 11/1893 Miller 1,734,901 11/1929 Gerrie 34/143 2,454,253 11/1948 Kriveton 432/6 2,671,160 3/1954 Segsworth 432/ 3,456,581 7/1969 Zuber 34/144 FOREIGN PATENTS OR APPLICATIONS 861,584 10/1940 France 432/125 Primary ExaminerJ0hn J. Camby Assistant Examiner-Henry C. Yuen Attorney, Agent, or Firm-Roylance, Abrams, Berko & Kaul [57] ABSTRACT 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.
5 Claims, 5 Drawing Figures 1,549,823 8/1925 White 432/121 4 f l I/ 27 PATENTED 8975 3.867. 093
SHEET? 0F 2 HEAT TREATING APPARATUS BACKGROUND OF THE INVENTION 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. Usually a hoodwhich 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.
However, due to unavoidable manufacturing toleratious, such platelike workpieces show differences in thickness caused by the production steps which procede the sintering process. Therefore, when more than one stack of plates are introduced into a pressure sintering Furnace, the stacks composed of equal numbers of pieces, will show different heights even if the design size of all the plates is the same. These differences are not easy to compensate even by the insertion of packing pieces. Stacks of unequal heights result in the application of unequal pressure .to the several stacks and hence to the workpieces. The uniform application of that pressure which is needed for complete sintering of the linings to the backing, or carrier plates therefore cannot be ensured. Consequently the simultaneous treatment of several stacks in the hitherto conventional manner leads to high rates of the rejects and rquires the destruction of a greater number of samples than is otherwise usual for testing whether sintering has been complete.
OBJECTS AND SUMMARY OF THE INVENTION It is therefore an object of the present invention to eliminate these drawbacks and to provide a heat treating apparatus that will permit stacks of different heights to be satisfactorily and economically treated.
According to the invention 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.
Moreover, if desired, only part of the furnace chamber need be filled and the treatment performed under ideal pressure conditions although in such a case the total capacity is only fractionally utilised. On the other hand, if the pressure conditions resulting from an application of pressure to three stacks in the formerly conventional manner is considered acceptable, then the capacity of such apparatus can be increased to several times that of conventional equipment.
Further objects and advantages are to be derived from the claims, from the following particular descrip tion and from the drawings which schematically exemplify heat treatment equipment according to the invention in a pressure sintering furnace.
BRIEF DESCRIPTION OF THE DRAWINGS 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, and
FIG. 5 is a view of the arrangement in FIG. 4, seen in plan.
DESCRIPTION OF A PREFERRED EMBODIMENT 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. Accoding to the invention 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.
It will be understood from FIG. 3 that the hearth plates 241, 242, 243, 244 in one embodiment of the proposed equipment are quadrants of a circle. However, for treating parts that have different kinds of contours the hearth surface may also be divided in other ways and the component plates may have alternative geometrical shapes, for example squares or rectangles.
If necessary 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. 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.
Moreover, such coupling plates provide a flat unbroken surface which prevents the workpieces at the bottom of the stacks from being damaged.
What is claimed is:
1. 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;
heat generating means within said chamber;
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; and
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.
2. An apparatus according to claim 1, characterized in that said component surfaces are separated the one form the other by small gaps, and in that said coupling means is a plate having fins which exactly fit into the gaps between said component surfaces to be coupled.
3. An apparatus according to claim 1, characterized in that said component surfaces define means for receiving portions of said coupling means and in that said coupling means is a plate having portions received by said means for receiving.
4. In an apparatus for simultaneously treating substantially plate-shaped workpieces with heat and pressure having 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; heat generating means within said chamber; ram means in cooperating relation with said surface means for moving said surface means under pressure in a direction toward said portion of said cover means into said chamber to press the workpieces thereon against said cover means, the improvement comprising:
a plurality of separate component surfaces comprising said surface means,
a plurality of ram members comprising said ram means,
each of said component surfaces being mounted in said hearth for independent movement by an associated one of said ram members, and
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.
5. An apparatus according to claim 4, characterized in that each of said component surfaces is larger than the bottom surface of each workpiece.
Claims (5)
1. An apparatus for simultaneously treating substantially plateshaped 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; heat generating means within said chamber; 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; and 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.
2. An apparatus according to claim 1, characterized in that said component surfaces are separated the one form the other by small gaps, and in that said coupling means is a plate having fins which exactly fit into the gaps between said component surfaces to be coupled.
3. An apparatus according to claim 1, characterized in that said component surfaces define means for receiving portions of said coupling means and in that said coupling means is a plate having portions received by said means for receiving.
4. In an apparatus for simultaneously treating substantially plate-shaped workpieces with heat and pressure having 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; heat generating means within said chamber; ram means in cooperating relation with said surface means for moving said surface means under pressure in a direction toward said portion of said cover means into said chamber to press the workpieces thereon against said cover means, the improvement comprising: a plurality of separate component surfaces comprising said surface means, a plurality of ram members comprising said ram means, each of said component surfaces being mounted in said hearth for independent movement by an associated one of said ram members, and 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.
5. An apparatus according to claim 4, characterized in that each of said component surfaces is larger than the bottom surface of each workpiece.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2249194A DE2249194C3 (en) | 1972-10-05 | 1972-10-05 | Device for pressure sintering plate-shaped parts |
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 (en) |
JP (1) | JPS4973311A (en) |
DE (1) | DE2249194C3 (en) |
FR (1) | FR2202582A5 (en) |
GB (1) | GB1406198A (en) |
IT (1) | IT995500B (en) |
Cited By (12)
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 (en) * | 2012-09-04 | 2014-09-05 | 한국생산기술연구원 | Sintering method and apparatus of the diamont tool using induction heating |
Families Citing this family (2)
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 (en) * | 1989-05-01 | 1995-08-16 | 曙ブレーキ工業株式会社 | Disk pad heating jig |
Citations (7)
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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 |
-
1972
- 1972-10-05 DE DE2249194A patent/DE2249194C3/en not_active Expired
-
1973
- 1973-09-20 GB GB4415373A patent/GB1406198A/en not_active Expired
- 1973-09-26 IT IT29421/73A patent/IT995500B/en active
- 1973-10-01 US US402046A patent/US3867093A/en not_active Expired - Lifetime
- 1973-10-05 JP JP48111590A patent/JPS4973311A/ja active Pending
- 1973-10-05 FR FR7335660A patent/FR2202582A5/fr not_active Expired
Patent Citations (7)
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)
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 (en) * | 2012-09-04 | 2014-09-05 | 한국생산기술연구원 | Sintering method and apparatus of the diamont tool using induction heating |
Also Published As
Publication number | Publication date |
---|---|
IT995500B (en) | 1975-11-10 |
DE2249194A1 (en) | 1974-04-18 |
FR2202582A5 (en) | 1974-05-03 |
JPS4973311A (en) | 1974-07-16 |
GB1406198A (en) | 1975-09-17 |
DE2249194C3 (en) | 1975-07-24 |
DE2249194B2 (en) | 1974-12-12 |
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