TWI838791B

• Main Author: SHI, YI-JIE
• Format: Patent
• Language: Chinese
• Published: 11.04.2024
• Subjects: BLASTING; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

The present invention provides a self-drilling screw structure and a manufacturing method thereof. The manufacturing method includes: providing a screw body, forming a self-drilling screw stem section, forming a concave neck, forming a self-drilling cutting edge, and forming a thread. The self-drilling screw structure includes a screw head part and a screw stem part. The screw stem part is provided with a threaded screw stem section, a self-drilling screw stem section and a drill screw stem section in sequence. The threaded screw stem section has a threaded rod diameter and the thread. The self-drilling screw stem section has a self-drilling rod diameter, a plurality of self-drilling cutting edges, and a plurality of self-drilling chip flutes arranged in a staggered manner. From an end connected to the self-drilling screw stem section, the drill screw stem section is sequentially provided with an cambered concave neck part, a positioning part and a tip part, and the drill screw stem section is convexly formed