JPH0322053U

JPH0322053U -

Info

Publication number: JPH0322053U
Application number: JP1989081376U
Authority: JP
Priority date: 1989-07-11
Filing date: 1989-07-11
Publication date: 1991-03-06

Description

[Brief explanation of the drawing]

第１図〜第４図は本考案の一実施例を説明する
ための図面であつて、第１図は斜視図（但しコア
を取り付けてない状態）、第２図は一部透視正面
図、第３図は第２図のＡ−Ａ線矢示断面説明図、
第４図は第２図のＢ−Ｂ線矢示断面説明図である
。第５図は変形例のチツプを採用した場合の第３
図に対応する図面である。第６図は割り型コイル
の斜視図、第７図は割り型コイルとワークの断面
説明図、第８図は面焼きコイルとワークの斜視図
、第９図は凹所底面焼入れコイルをワークに接近
した配置した状態での凹所底面焼入れコイルとワ
ークの断面説明図、第１０図は凹所底面焼入れコ
イルの図面であつてａは斜視図、ｂはａのＤ−Ｄ
線矢示断面説明図、第１１図ａ，ｂはそれぞれコ
アを除いた状態の第１０図ａ，ｂに対応する図面
である。５１……第１の給電コイル、５２……第２の給
電コイル、５３……第３の給電コイル、５４……
加熱コイル、５７……スペース、６１，６２，６
３……チツプ、８０……高周波電源、１００……
ワーク、１０１……底面、１０９……凹所、５１
１，５２１，５３１，５４１……一端、５１２，
５２２，５３２，５４２……他端、５４５…凹部
、５５１……第１のコア、５５２……第２のコア
。 1 to 4 are drawings for explaining one embodiment of the present invention, in which FIG. 1 is a perspective view (with no core attached), FIG. 2 is a partially transparent front view, FIG. 3 is an explanatory cross-sectional view taken along line A-A in FIG.
FIG. 4 is an explanatory cross-sectional view taken along the line BB in FIG. 2. Figure 5 shows the third case when the modified chip is adopted.
FIG. Fig. 6 is a perspective view of the split coil, Fig. 7 is a cross-sectional explanatory diagram of the split coil and the workpiece, Fig. 8 is a perspective view of the surface hardening coil and the workpiece, and Fig. 9 is a concave bottom hardening coil on the workpiece. Fig. 10 is a cross-sectional view of the recessed bottom hardening coil and the workpiece in a state in which they are placed close to each other, and FIG.
11a and 11b are diagrams corresponding to FIGS. 10a and 10b with the core removed, respectively. 51...First feeding coil, 52...Second feeding coil, 53...Third feeding coil, 54...
Heating coil, 57... Space, 61, 62, 6
3... Chip, 80... High frequency power supply, 100...
Workpiece, 101...bottom, 109...recess, 51
1,521,531,541...One end, 512,
522, 532, 542...other end, 545...recess, 551...first core, 552...second core.

Claims

[Scope of utility model registration request]

A heating coil formed in an arc shape of an approximately semicircle or a circle smaller than a semicircle and disposed close to the bottom surface facing the bottom surface of the annular recess formed on the circumferential surface of the workpiece, and a heating coil having one end heated. A first feeding coil connected to one end of the coil, a second feeding coil having one end connected to the other end of the heating coil, and a third feeding coil having one end connected to the other end of the second feeding coil. A coil, first and second cores formed to cover a surface of the heating coil that does not face the bottom surface, and three chips that maintain a constant distance between the heating coil and the bottom surface. , a recessed portion is formed in the heating coil between the cores to provide a substantially upper portion of one of the chips, and the first, second and third power feeding coils A recessed bottom hardened coil that forms a space for accommodating substantially the lower part of the chip, and is characterized in that a high frequency voltage is applied between the closely disposed opposite ends of the first and third power feeding coils. .