JPS59191215U - ball end mill - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

図面は本考案の一実施例を示し、第１図は本例のボール
エンドミルの斜視図、第２図は同じく一部破断拡大正面
図、第３図は同裏面図、第４図は同右側面図、第５図は
同拡大底面図、第６図は第２図のＡ−Ａ線切断拡大端面
図、第７図は加工物の凹面を切削中のボールエンドミル
の下部の拡大正面図である。 １・・・・・・ボールエンドミル、２・・・・・・柄部
、３・・・・・・刃部、４ａ・・・・・・凹溝、４ｂ・
・・・・・凹溝、６・・・・・・切込み。The drawings show one embodiment of the present invention; Fig. 1 is a perspective view of the ball end mill of this embodiment, Fig. 2 is a partially cutaway enlarged front view, Fig. 3 is a back view of the same, and Fig. 4 is a right side view of the same. Fig. 5 is an enlarged bottom view of the same, Fig. 6 is an enlarged end view cut along the line A-A in Fig. 2, and Fig. 7 is an enlarged front view of the lower part of the ball end mill while cutting the concave surface of the workpiece. be. 1...Ball end mill, 2...Handle part, 3...Blade part, 4a...Concave groove, 4b...
... Concave groove, 6 ... Cut.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] はぼ丸棒状の鋼材の上部を柄部とし、下部に刃部を形成
するとともに、該刃部の下端部を円弧状に形成し、該刃
部には縦方向に適数個の凹溝を凹設し、該凹溝の下端縁
部に鋭利な刃先を形成するとともに、刃部の下端部の中
心位置から若干離れた位置に逆■字形の切込みを設けて
なるを特徴とするボールエンドミル。The upper part of the round bar-shaped steel material is used as a handle part, and the lower part is formed with a blade part, and the lower end of the blade part is formed in an arc shape, and the blade part has an appropriate number of grooves in the vertical direction. A ball end mill characterized in that the groove is recessed, a sharp cutting edge is formed at the lower edge of the recessed groove, and an inverted ■-shaped notch is provided at a position slightly away from the center of the lower end of the blade.