CN-117484916-B - Efficient automatic wire laying forming method for L-shaped end frames of composite revolving shell

CN117484916BCN 117484916 BCN117484916 BCN 117484916BCN-117484916-B

Abstract

The invention provides a high-efficiency automatic wire laying forming method of an L-shaped end frame of a composite revolving shell, which comprises the steps of perpendicularly optimizing a mandrel from a flanging surface to a clamping main shaft to be parallel to the flanging surface, optimizing the mandrel from an original rotating die to a swinging die by utilizing an original main shaft system, fixedly connecting the mandrel with a U-axis of the clamping main shaft through a V-axis, fixedly connecting a wire laying tool with the U-axis of the clamping main shaft through the V-axis, rotating the V-axis and the wire laying tool along with the U-axis of the clamping main shaft during laying, dividing a circumferential layer into a plurality of parts, and adopting a fixed area laying mode to realize the circumferential layer laying, wherein each time one layer is laid in a fixed area of the wire laying head, carrying out layer laying from the V-axis rotating die to the next layer, and finally completing the circumferential layer overall laying. The invention solves the problem of collision interference between the wire laying head and the die, the mechanical arm and the like during end frame laying.

Inventors

LI LIANG
CHU QIYI
HU WEIYE
WAN JING
DAI WEIDI
DOU MINGYUE
LUO RUI
DING XIAOQING

Assignees

南京晨光集团有限责任公司

Dates

Publication Date: 20260512
Application Date: 20231130

Claims (2)

1. The utility model provides a high-efficient automatic shop silk shaping method of composite revolving casing L formula end frame which characterized in that includes: The mandrel is perpendicularly optimized from a flanging surface to a clamping main shaft to be parallel to the flanging surface, an original main shaft system is utilized to be optimized from an original rotary die to be a swinging die, the mandrel is fixedly connected with a U-shaft of the clamping main shaft through a V-shaft, and the flanging surface faces to the wire laying head; The paving tool is connected with the clamping main shaft U through a V shaft, and the V shaft and the paving tool rotate along with the clamping main shaft U when being paved; Uniformly dividing the circumferential layering into a plurality of parts, and adopting a fixed area laying mode to realize the circumferential layering, wherein a wire laying head is used for fixing the area laying, one layering is completed after each layering, the layering is carried out from a V-axis rotating die to the next layering, the layering is carried out in a sequential mode, and finally, all the circumferential layering is completed; the design of the paving tool comprises the following steps: (1) Firstly, setting a paving included angle theta of a paving circumferential paving fixed paving area; (2) Taking any flanging upper boundary points at two sides of a laying included angle theta area as a track starting point, generating a skin track line of the laying included angle theta by a geodesic method in the skin area, generating a flanging track line by a natural path method in the flanging area, and forming a laying center track line at the outermost side of a fixed laying area by the track line; (3) Continuously adjusting tooling parameters h and L 1 、L 2 to ensure that the core mould does not collide and interfere in the laying process of the outermost laying path of the fixed laying area of the core mould, wherein h is the distance from the boundary of the core mould to the U axis of the main shaft, and L 1 、L 2 is the distance from the clamping positions of the chucks at two ends to the boundary of the core mould; (4) Sequentially carrying out the design of the laying track of the largest laying area of the layers with different angles by adopting the track line generating method in the step (2), carrying out the spreadability simulation, continuously optimizing the tool parameters and the laying included angle theta by each angle layer, solving the intersection of the tool parameters and the laying included angle theta, and ensuring that the tool design meets the spreadability of the layers with different angles; In order to realize the laying of a fixed area of a laying head and the circumferential full-coverage laying, a laying strategy and a path algorithm are required to be optimized synchronously, and the method specifically comprises the following steps: (a) Taking any boundary point on the flanging as a track starting point, generating a skin track line by adopting a geodesic method in the skin region, generating a flanging track line by adopting a natural path method in the flanging region, and taking the two track lines as initial paths Other paths are respectively rotated by a set angle from the initial path to generate other laying paths 、 ... , Calculating the broken yarn feeding key points of each track for the number of the central tracks; (b) Repartitioning the laying paths based on the determined fixed laying area laying angle theta 、 ... , The number of the subareas and the included angle of each subarea Needs to meet the requirements of ; (C) The subarea paths are rotated to a fixed laying area, and the subarea paths are calculated respectively 、 ... Angular bisector of region to be laid and fixed laying region Included angle of angular bisector of (2) Will respectively All tracks contained in a zone are rotated entirely The degree reaches a fixed laying area, the laying track and key points are recalculated, and the output NC/u is updated Track file, rotating with V-axis The degree realizes the fixed area laying and Zhou Xiangquan covering laying of the laying head.
2. The efficient automatic wire laying forming method of the composite rotary shell L-shaped end frame according to claim 1, further comprising the steps of performing laying simulation based on the acquired tooling parameters and the track planning result, and finally outputting NC programs and setting process parameters for laying forming.

Description

Efficient automatic wire laying forming method for L-shaped end frames of composite revolving shell Technical Field The invention belongs to the technical field of composite material forming, and particularly relates to a high-efficiency automatic wire laying forming method for an L-shaped end frame of a composite material rotary shell. Background Because of the characteristics of light weight and high strength, the carbon fiber composite material has become a main structural material of an aerospace vehicle, the application parts and the number of the carbon fiber composite material are increased year by year, and the carbon fiber composite material is more widely applied to the field of cabin sections of the aerospace vehicle. The solid of revolution structure such as complicated irregularly-shaped curved surface, awl, drum with L-shaped end frame characteristic is the structure form that often uses. The automatic wire laying technology becomes one of the advanced manufacturing technologies for aerospace due to the advantages of high production efficiency, strong manufacturability of complex structures and the like. The curved surface of the turning shell at the end frame flanging is folded towards the axis to form a bundle, so that on one hand, the flanging has the characteristics of large curvature and inextensibility, and the flanging is easy to generate collision interference, tow distortion, gaps and other defects due to unreasonable postures, and on the other hand, the main body structure of the automatic yarn laying equipment and the mechanical structure of the yarn laying head are limited, and the yarn laying head is easy to generate collision interference between the yarn laying head and a die, a mechanical arm and the like due to severe posture changes during end frame laying. The existing scheme aims at the end frame characteristics, and the problems are difficult to solve by automatically laying a rear module to optimize the laying posture, collision avoidance and the like. Disclosure of Invention The invention aims to provide a high-efficiency automatic wire laying forming method for an L-shaped end frame of a composite rotary shell, which aims to solve the problems of collision interference, wire bundle distortion and gap defect generated by the limitation of a body structure and large change of flanging curvature of the existing automatic wire laying equipment when the L-shaped end frame of the composite rotary shell is laid. The technical solution for realizing the purpose of the invention is as follows: an efficient automatic wire laying and forming method for an L-shaped end frame of a composite rotary shell comprises the following steps: The mandrel is perpendicularly optimized from a flanging surface to a clamping main shaft to be parallel to the flanging surface, an original main shaft system is utilized to be optimized from an original rotary die to be a swinging die, the mandrel is fixedly connected with a U-shaft of the clamping main shaft through a V-shaft, and the flanging surface faces to the wire laying head; The paving tool is connected with the clamping main shaft U through a V shaft, and the V shaft and the paving tool rotate along with the clamping main shaft U when being paved; dividing the circumferential layering into a plurality of parts, adopting a fixed area laying mode to realize the circumferential layering, wherein each time one layering is laid, the layering is carried out from a V-axis rotating die to the next layering, and the layering is carried out in a sequential mode, so that all the circumferential layering is finally completed. Compared with the prior art, the invention has the remarkable advantages that: (1) The invention does not need to reform the existing automatic wire laying equipment, and solves the problem of collision interference between the wire laying head and a die, a mechanical arm and the like when the end frame is laid. The forming tool disclosed by the invention is optimized from an original rotating die to a swinging die by utilizing an original spindle system, and the curvature change is reduced by coupling motion with a wire laying head, so that the severe change of the posture when an end frame is laid is avoided, and meanwhile, the stroke change of each shaft of a robot is reduced, and the laying efficiency is improved; (2) The tooling and the flanging path planning algorithm enable the revolving body to be paved in a fixed area and complete circumferential full-paving, the fixed area is paved to keep a smaller posture change range all the time, the filament bundle distortion and gap defects are reduced, and the paving efficiency is higher. Drawings FIG. 1 is a plot of a lay-up collision interference effect. FIG. 2 is a schematic diagram of a lay-up scheme and tooling. FIG. 3 is a schematic illustration of a fixed placement area. Fig. 4 is a schematic diagram of path planning and partitioning post-processing. FIG. 5 is a plot of a fix