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Patent Agency Ranking
公开(公告)号：JPS59208017A
公开(公告)日：1984-11-26
申请号：JP8359883
申请日：1983-05-13
Applicant: Hitachi Metals Ltd
Inventor： TAKEDA TOMU , YASUDA TOMOSHI , KASHIWAGI IWAO
Abstract: PURPOSE:To increase the cooling rate after the heat treatment of a material to be heat-treated and to enable control of cooling rate with a simple device by forming a space in a furnace shell part and a gas circulating system communicating respectively with the upper and lower parts of the space for housing the material to be heat-treated. CONSTITUTION:An all case type batch operated vacuum heat treating furnace consists of a hermetically constructed furnace shell 2 and refractories 7 lined on the inside of the shell 2 by having a space 5 from the shell 2. The respective upper and lower parts of the shell space 5 provided between said shell 2 and the refractories 7 and the space for housing a material 10 to be heat treated enclosed with the refractories 7 are communicated by communicating holes 12 to constitute a gas circulating system by the difference in gas density arising from a temp. difference between the respective space parts.
Abstract translation: 目的：为了提高待热处理材料的热处理后的冷却速度，通过在炉壳部分和气体循环系统中形成空间，通过简单的装置控制冷却速度， 用于容纳要热处理的材料的空间的下部。 构成：全箱式批量真空热处理炉由外壳2的空间5组成的密封构造的炉壳2和内衬在壳体2的内部的耐火材料7组成。壳体的相应的上部和下部 设置在所述壳体2和耐火材料7之间的空间5，并且用于容纳被耐火材料7包围的热处理材料10的空间通过连通孔12连通，以通过由温度产生的气体密度差构成气体循环系统 。 各空间部分之间的差异。
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公开(公告)号：JP2000024814A
公开(公告)日：2000-01-25
申请号：JP19172098
申请日：1998-07-07
Applicant: HITACHI METALS LTD
Inventor： TAKEDA TOMU , KADOWAKI TAMIJI
Abstract: PROBLEM TO BE SOLVED: To increase a drilling speed and reduce a thrust load by forming a composite drill with a central drill and a peripheral drill concentrically surrounding the central drill both of which can be independently rotated and have cutting edges at the tip. SOLUTION: A central drill drive motor 26 provided on a casing 22 rotates a central drill 1 held by a central drill chuck 16. A peripheral drill drive motor 27 provided on the casing 22 rotates a peripheral drill 3 through a peripheral drill shank section 6 via a peripheral drill drive shaft 21, a pinion 23, a gear 10 and a key 18. The revolving speeds of the central drill 1 and the peripheral drill 3 are independently controlled by dedicated motors 26, 27 respectively to cope with changes of various drilling conditions. The diameter of the head section of the central drill 1 is made larger than the diameter of the barrel section, a step is provided between them, and a thrust load is shared by the peripheral drill 3.
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公开(公告)号：JPS61517A
公开(公告)日：1986-01-06
申请号：JP12147984
申请日：1984-06-13
Applicant: HITACHI METALS LTD
Inventor： TOOYAMA FUMIO , TAKEDA TOMU
Abstract: PURPOSE:To provide sufficiently rapid cooling to a material to be treated and to eliminate unfavorable influence on a vacuum system by providing a fluidized bed to adjacent cooling chambers which are separated by a partition plate in a vacuum heating chamber, and providing in the cooling chamber a means for charging an atmospheric gas into the cooling chamber at specified pressure. CONSTITUTION:A fluidized-bed device 12 is provided at the lower part of a cooling chamber 5 of a vacuum heat-treating apparatus. After a material 21 to be treated is heated in a heating chamber 1, a partition plate 2 is opened, the material 21 to be treated is transferred to a specified position in the fluidized-bed device 12 of the cooling chamber 5, and the partition plate 2 is closed. A solenoid valve 14 is simultaneously opened, and an atmospheric gas is rapidly supplied into the cooling chamber 5. A valve of a pipeline 13 is simultaneously opened, and the gas is supplied so that the pressure detected by a pressure detector 9 may be sufficiently higher than the pressure detected by a pressure detector 10 to fluidize the granular substance 12a on a gas dispersing plate 11. The material 21 to be treated is immersed in the fluidized bed 12 by a lift 16, and cooled. When the internal pressure of the cooling chamber 5 reaches the set pressure, the supplied gas is recovered through a valve 17 and a pump 18, and the internal pressure of the cooling chamber 5 is kept at a set pressure, the supplied gas is recovered through a valve 17 and a pump 18, and the internal pressure of the cooling chamber 5 is kept at a set pressure.
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公开(公告)号：JPS5925935B2
公开(公告)日：1984-06-22
申请号：JP19660081
申请日：1981-12-07
Applicant: Hitachi Metals Ltd
Inventor： TAKEDA TOMU , KASHIWAGI IWAO
CPC classification number: C21D1/76
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公开(公告)号：JPS58117818A
公开(公告)日：1983-07-13
申请号：JP19660081
申请日：1981-12-07
Applicant: HITACHI METALS LTD
Inventor： TAKEDA TOMU , KASHIWAGI IWAO
Abstract: PURPOSE:To improve thermal efficiency by providing behind heating chambers, a heat exchanging chamber which is covered with shielding bodies having an opening through which materials to be treated pass, detecting the concn. of the specific components in the gaseous mixture of the air which is subjected to heat exchange with the materials to be treated and the gases formed by combustion introduced from the heating chambers and maintaining the mixing ratio thereof constant. CONSTITUTION:A heat exchanging chamber 12 covered with shielding bodies 10-1, 2 having an opening permitting the passes of materials 1 to be treated is provided behind heating chambers 4. The materials 1 which are conveyed after completion of heat treatments in the chambers 4 enter the chamber 12, then the air in the chamber 12 is subjected to heat exchange with the materials 1. The concn. of the specific component, for example, oxygen, in the gaseous mixture of said air and the gases formed by combustion introduced into the chamber 12 from the chambers 4 is detected with oxygen concn. cell type gas analyzers GA. According to the detected value, a solenoid valve MN is controlled to control the flow rate of compressed air from a compressed air source 15 into the chamber 12, whereby the mixing ratio of the air and the gases formed by combustion is maintained constant and the gaseous mixture is discharged.
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