CN-116770504-B - Circumferential track yarn carrying trolley of automatic three-dimensional composite material braiding equipment

CN116770504BCN 116770504 BCN116770504 BCN 116770504BCN-116770504-B

Abstract

The invention provides a scheme of a circumferential track yarn carrying trolley of a composite material automatic three-dimensional weaving device, which surrounds a track sliding trolley provided with yarn carrying devices, a foldable telescopic guide rail for the front of the trolley to be laid automatically is designed, a position detection switch and a start-stop control switch required by the operation of the trolley are arranged, a guide pulley on the trolley body can realize the stable shuttle of the track sliding trolley along the track in a narrow space through the above design, the function of closed-loop control in the operation process can be realized, the trolley carries the yarn carrying devices with the functions of active yarn collecting and constant tension passive yarn releasing, the stable weaving tension is ensured, the yarn carrying devices are also in a flat design, the whole appearance of the trolley is flattened, the multilayer distribution of the circumferential track and the track yarn carrying trolley can be realized on a mounting bottom plate, and the automatic three-dimensional weaving can be effectively participated.

Inventors

SHAN ZHONGDE
SUN XIANPENG
SUN ZHENG
LIU JIALE
OuYang Linzhi

Assignees

南京航空航天大学
南京长江工业技术研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20230626

Claims (10)

1. The utility model provides a circumference track slides and takes yarn dolly, includes track coaster, takes yarn ware, collapsible track subassembly, track coaster dolly start-stop control assembly, its characterized in that: the rail sliding trolley comprises a motor arranged at one end of the bottom, a driving wheel connected with the motor, and a magnet fixed on a trolley bottom plate, wherein the other end of the motor is provided with a driven wheel, both sides of the bottom are provided with guide pulleys, one side of the driven wheel is provided with a motor starting switch, and the upper part of the rail sliding trolley is connected with the yarn carrier; The yarn carrier comprises a yarn carrier body, a yarn bobbin, an active yarn collecting unit, a passive constant tension yarn discharging unit, a yarn guiding and controlling unit and a yarn discharging tension adjusting unit, wherein the yarn bobbin, the active yarn collecting unit, the passive constant tension yarn discharging unit, the yarn guiding and controlling unit and the yarn discharging tension adjusting unit are arranged on the yarn carrier body; The foldable track assembly comprises a turntable, a guide rail, a first air cylinder, an air cylinder base, a second air cylinder, a third air cylinder and a first linear guide rail, wherein the turntable is used for paving the guide rail, the guide rail is arranged on a mounting bottom plate, the first air cylinder is connected with the guide rail, the air cylinder base is used for fixing the first air cylinder, the second air cylinder is used for driving the guide rail to move, the third air cylinder is used for pushing the air cylinder base, and the first linear guide rail is used for bearing the air cylinder base to move; The track sliding trolley starting and stopping control assembly comprises a fourth cylinder for lifting the starting and stopping control assembly, a trolley bus rail, a Hall switch arranged at the bottom of the trolley bus rail, a mounting plate for mounting the trolley bus rail, a fifth cylinder for pushing the mounting plate, a sixth cylinder for controlling the trolley to start and stop, and a second linear guide rail for bearing the movement of the trolley starting and stopping control assembly.
2. The circumferential track sliding yarn carrying trolley of claim 1, wherein the magnet at the bottom of the track sliding trolley is used for triggering the Hall switch to control the trolley to start and stop.
3. The circumferential track sliding yarn carrying trolley of claim 1, wherein the active yarn collecting unit of the yarn carrier comprises a driving motor, a control switch for controlling the driving motor to rotate, a power battery for providing power for the driving motor, and a ratchet assembly connected with the yarn tube and driving the yarn tube to rotate.
4. A circumferential track sliding yarn carrying trolley according to claim 1 or 3, wherein the ratchet wheel assembly of the yarn carrier comprises outer ratchet wheel teeth, an inner supporting wheel which is arranged on the inner side of the outer ratchet wheel and concentric with the outer ratchet wheel, a pawl fixed on the inner supporting wheel, a pawl pin shaft which fixes the pawl on the inner supporting wheel, and a pawl reed which is fixed on the inner side of the outer ratchet wheel and plays a limiting role on the pawl.
5. The circumferential track sliding yarn carrying trolley of claim 4 wherein the passive constant tension yarn carrying unit of the yarn carrier comprises a spacer, a felt sheet attached to the spacer, a first spring connected to the spacer to provide a steady pressure, a yarn spool coupled to the ratchet assembly, and a ball stud connecting the spool with the yarn spool and securing the spacer and felt sheet to the yarn spool.
6. The circumferential rail sliding yarn carrying trolley according to claim 1, wherein the yarn guiding and controlling unit of the yarn carrier comprises a floating pulley assembly, a second spring connected with the floating pulley assembly, a yarn guiding porcelain eye for guiding the yarn out of the yarn tube, a guiding wheel fixed at one end and a guiding porcelain eye positioned at the upper end of the guiding wheel.
7. The circumferential rail sliding yarn carrying trolley according to claim 1, wherein the tension adjusting unit of the yarn carrier comprises an adjusting nut fixed at the end of the yarn tube and a set screw for fixing the position of the adjusting nut.
8. The circumferential track sliding yarn carrying trolley according to claim 1, wherein the foldable track assembly and the track sliding trolley start-stop control assembly comprise a second cylinder, a third cylinder, a fourth cylinder and a fifth cylinder which are provided with corresponding magnetic switches for detecting that the cylinders extend out to the right position.
9. The circumferential-track-sliding yarn-carrying trolley of claim 1 wherein the first cylinder deploys the guide rail by rotating the guide rail by 90 °.
10. The circumferential-track sliding yarn-carrying trolley of claim 1, wherein the mounting base plate comprises a plurality of turntables with the same structure.

Description

Circumferential track yarn carrying trolley of automatic three-dimensional composite material braiding equipment Technical Field The invention relates to the technical field of composite material knitting, in particular to a circumferential track yarn carrying trolley of automatic three-dimensional composite material knitting equipment. Background The three-dimensional braided composite material is a complete integral structure, has high specific strength and specific modulus, and has excellent mechanical properties and functions, so that the composite material is possible to manufacture main bearing structural members and special multi-functional members. The three-dimensional braided composite material is widely used as a functional structural material on aerospace aircrafts such as rockets, airplanes, satellites and the like, such as a rocket engine nozzle, a sealing adjusting sheet, a satellite truss, a combustion chamber lining, a missile nose cone, structural materials such as airplane engine fan blades and the like which are resistant to high temperature, ablation and high-speed scouring, and functional materials such as a silicon nitride fiber reinforced missile radome wave-transmitting material, a wear-resistant brake block material and the like. The braiding process of the three-dimensional braided composite material comprises a two-step method, a four-step method, a multi-layer joint braiding method, a multi-step method and the like, wherein the four-step method and the two-step method are the two most main methods used in the field at present. The four-step process allows for braiding of many different cross-sectional structures, such as plate, tube, semi-cylindrical, and columnar structures. The two-step method is suitable for braiding very thick structures, and can be used for braiding plate-shaped, tubular and other structures. The reasons for restricting the popularization of the three-dimensional knitting technology mainly include the problems of late start, autonomous research and development of equipment, innovative knitting technology, automatic and intelligent control technology and the like. Aiming at the current state of the three-dimensional weaving process of the composite material, a new weaving process for circumferentially encircling and threading the interwoven yarns is provided, and the implementation mode of the process is all manually operated at present, so that the problems of complicated work, low efficiency, large labor number, large occupied area and the like exist. Therefore, a new technology is required to solve the above-mentioned problems. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a scheme of a circumferential track yarn carrying trolley of a three-dimensional composite material automatic braiding device, so that automation of a yarn threading process in three-dimensional composite material braiding is realized, the production efficiency is improved, and the labor cost is reduced. In order to solve the technical problems, the technical scheme of the invention is as follows: A circumferential track sliding yarn carrying trolley comprises a track sliding trolley, a yarn carrier, a foldable track assembly and a track sliding trolley start-stop control assembly. The rail sliding trolley comprises a motor arranged at one end of the bottom, a driving wheel connected with the motor, and a magnet fixed at the bottom of the motor, wherein a driven wheel is arranged at the other end of the rail sliding trolley, guide pulleys are arranged on two sides of the bottom, a motor starting switch is arranged on one side of the driven wheel, and the upper part of the rail sliding trolley is connected with the yarn carrier. The yarn carrier comprises a yarn carrier body, a yarn tube, an active yarn collecting unit, a passive constant tension yarn discharging unit, a yarn guiding and controlling unit and a yarn discharging tension adjusting unit, wherein the yarn tube, the active yarn collecting unit, the passive constant tension yarn discharging unit, the yarn guiding and controlling unit and the yarn discharging tension adjusting unit are arranged on the yarn carrier body, the yarn tube is located at the upper portion of the yarn carrier body, the active yarn collecting unit is located at the bottom of the yarn carrier body, the passive constant tension yarn discharging unit is located at the middle portion of the yarn carrier body and connected with the active yarn collecting unit, the yarn guiding and controlling unit is located at one side of the yarn carrier body and connected and fixed with the lower portion of the yarn carrier body, and the yarn discharging tension adjusting unit is located at the top end of the yarn tube. The foldable track assembly comprises a turntable, a guide rail, a first cylinder, a cylinder base, a second cylinder, a third cylinder and a first linear guide rail, wherein the turntable is used for pavi