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1. 发明专利

JPS62286687A METHOD FOR JOINING DISSIMILAR MATERIAL 失效
公开(公告)号：JPS62286687A
公开(公告)日：1987-12-12
申请号：JP12725986
申请日：1986-06-03
申请人： DAI ICHI HIGH FREQUENCY CO LTD
发明人： HORIUCHI YASUSHI , OWADA YUTAKA
IPC分类号： C04B37/02 , B23K11/20 , B23K20/00
摘要： PURPOSE:To increase a joining strength by impressing plural electric powers having different frequencies with their time division on the same heating coil and joining dissimilar materials with their heating. CONSTITUTION:Dissimilar materials 1, 2 are arranged by interposing an adhesive 3 in the medium and an induction heating coil HC is set up at the upper part thereof. A ceramics or stainless steel is taken as the first member 1 and the dissimilar metal material to the member 1 as the 2nd member 2. The electric powers of two kinds or three kinds of frequencies having different frequency are impressed on the induction heating coil HC with their time division and after the temp. up of the member 1 and adhesive 3 upto the prescribed temp. and member 2 upto the other specific temp. they are cooled and the joining is performed. Since the joining is performed in a short time at the temp. suitable for each material the joining strength of the dissimilar materials is improved.

2. 发明专利

JPS62219489A METHOD OF INDUCTION HEATING OF METAL STRIP MATERIAL WITH LIMITED LENGTH 失效
公开(公告)号：JPS62219489A
公开(公告)日：1987-09-26
申请号：JP6075086
申请日：1986-03-20
申请人： DAI ICHI HIGH FREQUENCY CO LTD
发明人： HORIUCHI YASUSHI , TAKECHI MASAO
IPC分类号： H05B6/10

4. 发明专利

JPS62176616A BENDING METHOD FOR METAL TUBE 失效
公开(公告)号：JPS62176616A
公开(公告)日：1987-08-03
申请号：JP1753086
申请日：1986-01-29
申请人： DAI ICHI HIGH FREQUENCY CO LTD
发明人： HORIUCHI YASUSHI , WATANABE YASUO
IPC分类号： B21D7/16
摘要： PURPOSE:To properly heat and to perform a good work for bending with even a small curvature by alternately impressing time-shared, different frequency voltages to a heating coil and varying a ratio of sharing time at the beginning and finishing of the work. CONSTITUTION:Time-shared, different frequency voltages are alternately impressed to a high frequency induction heating coil HC by periods of time of t1 and t2. When the voltages are impressed with a ratio of t1/t2 adjusted, a heating temp. depth (heating depth) necessary for hot plastic deformation is changed. Thus, the sharing time ratio at the beginning of a bending work is gradually varied from a small prescribed value (a shallow heating depth) to a large prescribed value (a deep heating depth) and the sharing time ratio at the finishing of the bending work is gradually varied from a large value to a small value. Thus, a high quality bending are obtained by suitably adjusting the heating condition, even if a small curvature is required.

5. 发明专利

JPS62149809A HIGH-FREQUENCY HEAT TREATMENT 失效
公开(公告)号：JPS62149809A
公开(公告)日：1987-07-03
申请号：JP28790585
申请日：1985-12-23
申请人： DAI ICHI HIGH FREQUENCY CO LTD
发明人： HORIUCHI YASUSHI , WATANABE YASUO
IPC分类号： C21D1/10 , C21D9/32
摘要： PURPOSE:To make a good heat treatment of of steel products having ruggedness with high accuracy by alternately impressing time-divided voltages of different frequencies to a heating coil. CONSTITUTION:A power source is connected via switches SW1, SW2 to taps T1, T2 of a matching transformer Tr to make good matching to meet the frequencies f1, f2 to be impressed to the same heating coil HC. While the switches SW1, SW2 are opened and closed according to divided time T1, T2, the voltages of different frequencies are intermittently or continuously impressed to a material to be heated such as gear G by which said material is heated. The heating is executable by the above-mentioned method while the desired matching is maintained and therefore, the heat treatment of high accuracy is efficiently applied to the gear G and screw, etc.

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