| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 1 | 挤压丝攻 | CN201610190449.8 | 2016-03-30 | CN105798404A | 2016-07-27 | 杨宗利 |
| 本发明公开了一种挤压丝攻，包括一丝攻主体，所述一丝攻主体一端设有一夹持部，供一工具夹设，所述丝攻主体的另一端设有一多边形柱体的牙部，所述牙部的每一边包括环设有攻牙螺纹的螺纹段，相邻所述螺纹段之间设置有冷却油精，所述攻牙螺纹的深度从所述螺纹段的外端往内逐渐加大。本发明结构简单实用，易于加工内螺纹，防空转，且加工、定位精度高。 | ||||||
| 2 | 박육재용 콜드 포밍 탭 | KR1020110003030 | 2011-01-12 | KR1020110086506A | 2011-07-28 | 사와베데루오; 후지무라가즈테루 |
| PURPOSE: A cold forming tap for thin materials is provided to prevent a generation of burr and improve a quality by forming a small notched portion of a ridge top of a female screw. CONSTITUTION: A cold forming tap has a thread-shaped portion. The height of sharp ridge of the screw thread is H. The cut height of ridge is nearly formed H/8. The cut height of bottom of thread is formed over H/4. According to the pitch(P) of tap, the visual point of R surface(r2) of the circle inscribing in both sides of the diameter of the leading end of the tap is formed. The diameter of leading end of tap is formed. | ||||||
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