• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In the case of tools which have a working zone and a clamping zone, the clamping zone should not be hardened during the heat treatment. This is achieved by means of a holding device which consists of a metal of good thermal conductivity, contains blind holes for insertion of the tools and is provided with all-round thermal insulation. …<IMAGE>…
    公开号:SU1620052A3
    申请号:SU884356260
    申请日:1988-08-05
    公开日:1991-01-07
    发明作者:Лозе Хельмут；Болендер Оскар；Сверка Ханс
    申请人:Дегусса Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to holders for the partial heat treatment of tools in a vacuum furnace with compressed gas quenching "Goal - improved quality by eliminating quenching the danger of fracture in a continuous zone between the working area of the tool 1 and of its shank. The holder comprises a steel plate 1 with blind holes 2 for the shanks 3 of the tools 4 and a heat insulation 5 'located over the entire surface of the plate, the heat insulation holes being aligned with the plate holes, and the diameters of the insulation holes are equal to the diameters of the plate holes. When the tool is quenched after heating, the holder acts as a heat accumulator, which, when cooled, flows into the shanks, which cool more slowly. Due to this, in the transition zone between the working area of the tool and its shank, the danger of a break is eliminated. The thermally insulated holder on all sides can be used in almost all furnaces designed for thermo-. work. 1 ill.
    δ and „„ 1620652
    3
    1620052
    l
    The invention relates to heat treatment, in particular to holders for
    partial heat treatment of tools in quenched vacuum furnaces
    compressed gas.
    The purpose of the invention is to improve the quality of hardening by eliminating the danger of a break in the passage zone between the working area of the tool and its shank.
    The drawing schematically shows the holder.
    The holder contains a steel plate 1 with blind holes 2 for the 'shanks' 3 of the tools 4 and a heat insulation 5 located over the entire surface of the plate, while the insulation holes are aligned with the plate openings, and the diameters of the insulation holes are equal to the diameters of the plate openings. /
    The device operates as follows.
    When the tool is heated above the conversion temperature, the heat flowing from the working area of the tool to the clamping zone is transferred to a metal holder, which, thanks to the insulation, cannot get heat from the inside of the furnace on all sides. The mass of the holder must be so large that during heating it can accumulate so much heat so that the temperature of the clamping area of the tool (shanks) remains below the conversion temperature.
    When quenching the working area after the heating phase, the holder then acts as a heat accumulator, from which heat flows into the tool shanks and so slower cooling is carried out. Due to this, there is no structural change in the clamping zone, which substantially eliminates the risk of a break in the transition zone between the clamping zone and the working zone during tool operation.
    Drills, milling cutters, reamers and similar tools have a clamping dFL zone with which they are mounted in the machine tool chucks, and a working zone with which the machining processes are carried out.
    Due to the different requirements for these areas, they must also have different properties, for example strength. Therefore, it is possible to manufacture these tools from two different materials or to subject both zones to different heat treatments. With one material, it is necessary to apply partial heat treatment, when only the working zone is cured, and thereby increased resistance is given, while the clamping zone should preserve the initial technological properties as far as possible.
    It is necessary to construct a metal holder supplied with blind holes for inserting and tooling for partial heat treatment of the working area for clamping existing tools in a furnace with a homogeneous distribution of heat in the internal cavity of the furnace, in particular for vacuum chamber furnaces with quenching with compressed gas, during which application during heat treatment between the clamping area and the working area of the tool could be set as small a temperature difference as possible without heating the zone d For clamping, it is higher than the material-specific conversion temperature and when used during the hardening period, the clamping zone undergoes as slow cooling as possible. In the holder, the blind holes for inserting the tool must be designed so that good heat transfer between the holder and the tool is ensured. Holders are made mainly of heat-resistant steels, their sizes depend on the diameter and number of processed tools. The annular zone around the corresponding blind hole should have so much material that due to the absorption of heat during heating, the temperature ’in the clamping zone does not rise above the conversion temperature.
    I
    As insulating materials, all known high temperature resistant materials, in particular graphite felt, can be used. The thickness of the insulation layer is determined by the parameters of the furnace and the process during heat treatment. Usually this value is 20-50 mm. At a temperature in the working area of the tool 1200 C
    ma is equal to 900 - 1000 ° С. After hardening
    we get tools that show a very small tendency to kink in the transition section between the working area and the clamping area.
    The holder, thermally insulated on all sides, can be used in almost all furnaces intended for heat treatment, also in particular in vacuum furnaces and furnaces operating in an inert gas atmosphere, which are heated from all sides.
    Formula
    Holder for partial heat treatment of tools in vacuum pe10
    fifteen
    权利要求:
    Claims (1)
    [1]
    Quenched with quenching with compressed gas, containing metal inserts with blind holes for tool shanks and thermal insulation, in order to improve the quality of quenching by eliminating the danger of fracture in the transition zone between the tool working area and its shank, metal inserts are made in the form of a solid plate with holes, and the heat insulation is located over the entire surface of the plate, while the heat insulation holes are located coaxially with the holes of the plate, and the diameters of the heat insulation holes are equal to the diameters holes.
    g Compiled by N. Bukharev
    Red actor I. Derbak Tehred L. Serdyukova ProofreaderM. Demchik
    类似技术:
    公开号 | 公开日 | 专利标题
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    US3615927A|1971-10-26|Method for heat treating metallic articles
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    US8240183B2|2012-08-14|Method for the temperature treatment of extrusion tools
    US3704871A|1972-12-05|Apparatus for heat treating metallic articles
    PL136705B1|1986-03-31|Furnace for partial heat treatment of tools
    US2142139A|1939-01-03|Hardening process for high speed steel tools and other articles
    SU1238890A1|1986-06-23|Method of heat treatment of sintered hard alloy
    JPH0576977A|1993-03-30|Method and apparatus for high temperature die forging
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    RU2052537C1|1996-01-20|Method for manufacture and thermal treatment of cathodic elements of steady- state plasma engines with working channels
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    SU1504270A1|1989-08-30|Method of producing articles of steel and alloys
    SU1216247A1|1986-03-07|Method of hardening steel parts
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    RU2133283C1|1999-07-20|Ingot heating method
    RU1796357C|1993-02-23|Method for manufacturing cutting tool
    JPS61136628A|1986-06-24|Heat treatment of fork shaped parts
    JPS61159293A|1986-07-18|Laser beam machining method
    Mata1998|Experimental setup for conducting induction quenching
    KR880001355B1|1988-07-28|Quenching method for tools steel mould
    SU1765257A1|1992-09-30|Method of coating preparation
    SU837537A1|1981-06-15|Die for isothermic forming
    KR900007449B1|1990-10-10|Method for cooling a thick steel sheet
    同族专利:
    公开号 | 公开日
    IN170012B|1992-01-25|
    EP0302295B1|1991-03-27|
    BR8803863A|1989-02-21|
    JPS6455340A|1989-03-02|
    AT62023T|1991-04-15|
    EP0302295A1|1989-02-08|
    ZA885031B|1989-03-29|
    US4911415A|1990-03-27|
    DE3862179D1|1991-05-02|
    YU144788A|1990-02-28|
    DE3726134C2|1989-05-18|
    DE3726134A1|1989-02-23|
    GR3001677T3|1992-11-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US882162A|1907-04-13|1908-03-17|William A Painter|Method of hardening steel.|
    US1925116A|1929-05-15|1933-09-05|Nat Malleable & Steel Castings|Differential graphitization of cast articles|
    US2290546A|1940-06-22|1942-07-21|Larry D Donbeck|Apparatus for heat treating steel stamp blanks|
    US3615927A|1967-10-16|1971-10-26|Hayes Inc C I|Method for heat treating metallic articles|
    US3704871A|1970-07-13|1972-12-05|Hayes Inc C I|Apparatus for heat treating metallic articles|
    DE3111218A1|1981-03-21|1982-12-16|Ipsen Industries International Gmbh, 4190 Kleve|OVEN FOR HEAT TREATMENT OF DRILLS|
    DE3313651A1|1983-04-15|1984-10-18|Degussa Ag, 6000 Frankfurt|OVEN FOR PARTIAL HEAT TREATMENT OF TOOLS|
    US4528208A|1983-10-13|1985-07-09|Zymet, Inc.|Method and apparatus for controlling article temperature during treatment in vacuum|DE3841128A1|1988-12-07|1990-06-13|Bosch Gmbh Robert|Drilling tool|
    GB8907994D0|1989-04-10|1989-05-24|Torvac Furnaces Ltd|Vacuum furnace|
    DE3934103A1|1989-10-12|1991-04-25|Ipsen Ind Int Gmbh|OVEN FOR PARTIAL HEAT TREATMENT OF TOOLS|
    DE19538970B4|1995-10-19|2006-10-05|Widia Gmbh|Clamping shaft and method for its production|
    GB0018616D0|2000-07-28|2000-09-13|Dormer Tools Sheffield Ltd|Method and means for heat treating cutting tools|
    CN107254570B|2017-06-14|2018-11-23|沈阳航空航天大学|Modularization fixture and its application method for induction heating local heat treatmet|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3726134A|DE3726134C2|1987-08-06|1987-08-06|
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