公开(公告)号：US20200147701A1

公开(公告)日：2020-05-14

申请号：US16465266

申请日：2018-05-10

Applicant: Dalian University of Technology

Inventor： Fuji WANG ,  Zhenyuan JIA ,  Meng ZHAO ,  Yu BAI ,  De CHENG ,  Chong ZHANG

IPC: B23B51/02

Abstract: A vertical-edge double-step sawtooth cutter for preparing high-quality holes of composite material and thereof hybrid stack structure, and has three parts which are a major cutting edge region A, a minor cutting edge region B and a shank region C. The minor cutting edge region B comprises a step vertical-edge region D and a sawtooth cutting region E. This has the step structure and the sawtooth structure which is distributed in the first step, has a recutting function at the inlet and a reverse cutting function at the outlet in the direction opposite to the main cutting motion. The cutter has the vertical edge structure distributed in the second step, and the angle of the second step is a negative value, thereby realizing chip breaking and crushing, reducing scratch to the upper-layer composite material and metal hole walls.

公开(公告)号：US20210107109A1

公开(公告)日：2021-04-15

申请号：US17023012

申请日：2020-09-16

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Fuji WANG ,  Jianbo YAN ,  Meng ZHAO ,  Boyu ZHANG ,  Rao FU ,  Wei LIU ,  Jianwei MA ,  Zhenyuan JIA

IPC: B24B3/32

Abstract: A method for machining a drill with tilting blade slot structures for composite machining is provided. In the machining method, a face of the drill produces a downward component force for the inlet material to inhibit the inlet material from turning up; and a cutting edge inclination of an end surface at an outer turning point in a corner region of the drill is a positive value. The face and a flank are firstly partially ground in the corner region of the drill. The face at the outer turning point is ground with a grinding wheel to obtain two tilting blade slot structures. After grinding, a new face and a new cutting edge are obtained; and the cutting edge inclination on the end surface formed by the new cutting edge and a reference plane is a positive angle.

公开(公告)号：US20180257150A1

公开(公告)日：2018-09-13

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

IPC: B23B51/00 ,  B23B51/08

CPC classification number: B23B51/009 ,  B23B51/02 ,  B23B51/08 ,  B23B2226/275 ,  B23B2251/285

Abstract: A kind of sawtooth structure with reversed cutting function and its drill series are specifically fitted for drilling carbon fiber reinforced polymers (CFRP). The sawtooth structure is constructed by sawteeth and grooves located on the cutting edges of drill. And the sawtooth structure is helically arranged with a large helix angle around the axis of the drill. It can be divided into left-hand sawtooth structure and right-hand sawtooth structure by the helix angle. The bottom edges of the left-hand sawtooth function as cutting edges, and the rake angles are positive, while the top edges of the right-hand sawtooth are ground as positive rake angles. The sawtooth structure can be applied into multiple drilling tools, which proves to be universal. And it can effectively reduce delamination at both hole entry and hole exit as well as burrs defects. The series of drilling tools are double point angle drill, twist drill and stepped drill with sawtooth structure on the cutting edges. And such forms of drilling tools can achieve hole drilling of CFRP with minimum drilling defects. The drilling performance of the tools is thus improved to a great extent, and the tool life is extended while maintaining low usage costs.

公开(公告)号：US20240024993A1

公开(公告)日：2024-01-25

申请号：US18350921

申请日：2023-07-12

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Fuji WANG ,  Hongwei ZHAO ,  Rao FU ,  Meng ZHAO ,  Dekun YIN ,  Zhenyuan JIA

IPC: B23P15/32 ,  B23P15/46

CPC classification number: B23P15/32 ,  B23P15/46

Abstract: The present invention belongs to the technical field of composite material processing, and relates to a hole making tool for aramid fiber-reinforced plastic and a design method thereof. The drill bit has a step reversed point angle structure, which can reduce a trust force during drilling and effectively cut off a high toughness aramid fiber, thus to improve the hole making quality of an AFRP-related component. It is proved that the new tool can significantly improve the hole making quality of an AFRP component, improve the service life and safety degree, and greatly reduce the processing cost. Therefore, the present invention has a broad application prospect in the fields of aerospace, military industries and civil application.

公开(公告)号：US20230391014A1

公开(公告)日：2023-12-07

申请号：US18303402

申请日：2023-04-19

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Rao FU ,  Jianming ZHOU ,  Gongshuo WANG ,  Hongquan WANG ,  Shouyan GUAN ,  Fuji WANG

IPC: B29C64/393 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/393 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: A real-time multi-parameter coordinating 3D printing auxiliary forming process for continuous fiber reinforced composites belongs to the technical field of 3D printing. The method starts an external auxiliary heating mechanism and an external auxiliary pressure mechanism timely according to the characteristics of forming materials, the structure of a forming component and interlayer pressure and temperature differences measured in real time during printing, increases interlayer forming pressure of 3D printing and reduces an interlayer temperature difference to improve interlayer bonding strength of the composites. Meanwhile, the method starts a dedicated auxiliary mechanism accompanying mechanism timely according to an established printing trajectory to ensure that the relative positions of an auxiliary mechanism and a printing device are kept unchanged in real time, to realize sustainable forming of multi-parameter coordinating 3D printing for continuous fiber reinforced composites. The method improves the interlayer bonding quality of the component.

公开(公告)号：US20190299304A1

公开(公告)日：2019-10-03

申请号：US16465960

申请日：2018-05-17

Applicant: Dalian University of Technology

Inventor： Zhenyuan JIA ,  Fuji WANG ,  Zegang WANG ,  Meng ZHAO ,  Boyu ZHANG ,  Yu BAI

IPC: B23C5/18 ,  B23C5/10

Abstract: A special end cutting edge attached cutter for carbon fiber reinforced polymer/plastic with designable micro-tooth configuration, having an end cutting edge, a peripheral cutting edge with variation inverse helical groove, a peripheral cutting edge with constant inverse helical groove and a shank. Two parallel V-shaped chip pockets are designed on the end cutting edge of the cutter in two cutting edge directions which are symmetrical around a cutter axis as a center. The structure may enhance chip removal performance during high-speed milling of impenetrable slots and impenetrable windows, reduce wear of the end cutting edge, conduct configuration design for micro-teeth of the peripheral cutting edge, reduce the cutting thickness of the micro-tooth cutting edges, and effectively solve the problem of damage of the micro-tooth edges. A section of peripheral cutting edge with variation left-hand inverse helical flute angle is designed near the end cutting edge.

公开(公告)号：US20210170619A1

公开(公告)日：2021-06-10

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

IPC: B26D7/18 ,  B26F1/16

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.

公开(公告)号：US20200004228A1

公开(公告)日：2020-01-02

申请号：US16322290

申请日：2018-01-07

Applicant: Dalian University of Technology

Inventor： Zhenyuan JIA ,  Jianwei MA ,  Dening SONG ,  Siyu CHEN ,  Guangzhi HE ,  Fuji WANG ,  Wei LIU

IPC: G05B19/416

Abstract: This invention, a feedrate scheduling method for five-axis dual-spline curve interpolation, belongs to multi-axis NC (Numerical Control) machining filed, featured a feedrate scheduling method with constant speed at feedrate-sensitive regions under axial drive constraints for five-axis dual-spline interpolation. This method first discretizes the tool-tip spline with equal arc length, thus getting the relation between the axial motion and the toolpath by computing the first, second, and third order derivatives of the axial positions with respect to the tool-tip motion arc length. After that, determine the feedrate-sensitive regions with the constraints of axial drive limitations and the objective of balanced machining quality and efficiency. Finally, determine the acceleration/deceleration-start-point curve parameters by bi-directional scanning. The invented method can effectively make a balance between the feed motion stability and efficiency in five-axis machining, and possesses a high computational efficiency and a good real-time capability.

公开(公告)号：US20190317468A1

公开(公告)日：2019-10-17

申请号：US16311922

申请日：2018-01-07

Applicant: Dalian University of Technology

Inventor： Jianwei MA ,  Zhenyuan JIA ,  Dening SONG ,  Fuji WANG ,  Wei LIU ,  Ning ZHANG ,  Siyu CHEN ,  Guangzhi HE

IPC: G05B19/19 ,  G05B11/42

Abstract: The invented equivalent-plane cross-coupling control method belongs to high-precision and high-efficiency intelligent multi-axis CNC (Computer Numerical Control) machining filed, featured a three-axis cross-coupling controller based on the equivalent plane which can be used for improvement of the three-dimensional contour-following accuracy. This method first find the foot point from the actual motion position to the desired contour using a tangential back stepping based Newton method. Then, establish an equivalent plane which containing the spatial contouring-error vector by passing through the actual motion position and the tangential line at the foot point. After that, estimate the three-dimensional contouring error in a scalar form, thus controlling the signed error using a PID based two-axis cross-coupling controller. Finally, calculate the three-axis control signals according to the geometry of the equivalent plane, thus realizing the three-axis contouring-error control by using the well-studied two-axis contour controllers.