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公开(公告)号：US10857601B2
公开(公告)日：2020-12-08
申请号：US15750677
申请日：2016-08-18
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhenyuan Jia , Fuji Wang , Rao Fu , Yu Bai , Bin Niu , Wei Liu , Jianwei Ma , Chunling He
Abstract: A kind of sawtooth structure with reversed cutting function and its drill series are presented in this invention. This invention is suitable for drilling low-damage holes on carbon fiber reinforced polymers (CFRP). The sawtooth structure is comprised of sawteeth and grooves located on the cutting edges of drill. And the sawtooth structure is helically arranged with a specific helix angle around the axis of the drill. It can be classified as the left-hand helix sawtooth structure and the right-hand helix sawtooth structure based on the helix angle value. The bottom edges of the left-hand helix sawtooth structure are the cutting edges, and the rake angles are positive; while the top edges of the right-hand helix sawtooth are the cutting edge with the positive rake angles. The sawtooth structure can be applied to various drilling tools, which proves to be universal. And it can effectively reduce delamination at both hole entrance and hole exit as well as burrs defects. The series of drilling tools include the double point angle drill, the twist drill and the stepped drill all of which have the sawtooth structure on the cutting edges. These series of drilling tools can achieve the CFRP holes with minimum drilling defects. The drilling performance of the tools is improved to a great extent, the tool life is extended and the costs are reduced.
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公开(公告)号：US11766799B2
公开(公告)日：2023-09-26
申请号：US17082881
申请日：2020-10-28
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Fuji Wang , Shen Qiu , Rao Fu , Boyu Zhang , Meng Zhao , Wei Liu , Jianwei Ma
CPC classification number: B26D7/1863 , B26F1/16 , B26D7/2614
Abstract: Multi-adaptive fast loading attached air-cooled dust removal equipment is disclosed. The equipment is mainly composed of five parts: a spindle clamping mechanism, a link mechanism, a bearing connecting mechanism, an axial telescopic mechanism and a dust treatment mechanism. The equipment is connected with a tool holder through an axial connecting mechanism and installed on a machine tool. The axial telescopic mechanism forms a cavity with a processing surface, the gas flow generated by a negative pressure vacuum cleaner forms negative pressure in the cavity, and the telescopic mechanism is fixed to a machine tool spindle housing through the link mechanism to prevent the rotation of the spindle from driving the equipment to rotate and interfere with a workpiece, finally realizing rapid collection and treatment of chips.
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