阅读说明：本技术 一种回转异形体预制体高精度仿形控制装置及其方法 (High-precision profiling control device and method for rotary special-shaped body preform ) 是由 单忠德 汪旺 杨浩秦 王敏 全皓月 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种回转异形体预制体高精度仿形控制装置及其方法,包括斜纱引导机构、综框、定型机构、钢筘和垂纱引导机构,本发明涉及复合材料三维织造领域。该回转异形体预制体高精度仿形控制技术,通过对三维回转异形体仿形织造工艺技术的研究,在纱线阵列中沿z向加入定向纱线,以及在垂直于交织厚度方向的面内加入两组互相垂直的横向纤维和纵向纤维,形成回转异形体纤维交织物,对实现高精度仿形控制具有较大意义。(The invention discloses a high-precision profile control device and method for a revolving profile body preform, which comprises an inclined yarn guide mechanism, a heald frame, a shaping mechanism, a reed and a drop yarn guide mechanism, and relates to the field of three-dimensional weaving of composite materials. According to the high-precision copying control technology for the rotary special-shaped body preform, through research on a three-dimensional rotary special-shaped body copying weaving process technology, directional yarns are added into a yarn array along the z direction, and two groups of transverse fibers and longitudinal fibers which are perpendicular to each other are added into a plane perpendicular to the interweaving thickness direction to form a rotary special-shaped body fiber interwoven fabric, so that the high-precision copying control technology has great significance for realizing high-precision copying control.)

1. The utility model provides a gyration dysmorphism body preform high accuracy profile modeling controlling means which characterized in that: the weaving machine comprises a yarn array, an inclined yarn guide mechanism (4), heald frames (5), a vertical yarn guide mechanism (6), a reed (7) and a revolving special-shaped body prefabricated body (8), wherein the inclined yarn guide mechanism (4) is positioned on the left side of the heald frames (5), the vertical guide mechanisms (6) are arranged above and below the front surfaces of the heald frames (5), the reed (7) is positioned on the right side of the heald frames (5), and the yarn array comprises vertical yarns (1) arranged at the upper end and the lower end, two groups of inclined yarns (2) positioned between the two vertical yarns (1) and two warp yarns (3) positioned between the two groups of inclined sands (2); wherein, the vertical yarns (1), the oblique yarns (2) and the warp yarns (3) are all positioned on the left side of the oblique yarn guide mechanism (4), and the rotary special-shaped body prefabricated body (8) is positioned on the right side of the reed (7).

2. A high-precision copying control device for a preform of a rotary profile body according to claim 1, wherein: oblique sand (2) is added in the yarn array along the thickness direction (z direction), and two groups of transverse fibers (x direction) and longitudinal fibers (y direction) which are perpendicular to each other are added in a plane which is perpendicular to the interweaving thickness direction, namely warp yarns (3) and vertical yarns (1) are added, so that a revolving profile body prefabricated body (8) is formed.

3. A high-precision copying control device for a preform of a rotary profile body according to claim 1, wherein: each of the drop guide mechanisms (6) is fixed to the heald frame (5) by a moving mechanism.

4. The method of controlling high-precision copying of a preform of a rotary profile body according to claim 1, wherein: the method comprises the following steps:

s1, passing the warp (3) and the bias yarn (2) of the three-dimensional multilayer profiling weaving process through a reed (7) after entering the interior of a heald frame (5) through a bias yarn guide mechanism (4);

s2, the vertical yarn guide mechanism (6) reciprocates between the inclined yarn guide mechanism (4) and the reed (7) through the heald frame (5) and guides the vertical yarns (1) of the upper group and the lower group to respectively penetrate through the warp layer and the inclined yarn layer;

s3, the inclined yarn guiding mechanism (4) guides inclined yarn warp yarn layers to form weft yarn layers, and finally, yarns form a rotary special-shaped body prefabricated body after a reed (7).

5. The method of controlling high-precision copying of a preform of a rotary profile body according to claim 4, wherein: in the steps S1-S3, the control of the rotating profile body preform profile weaving process equipment involves the control of four directions of warp yarns, vertical yarns and 2 groups of oblique yarns, so as to realize the profile control of the rotating profile body preform.

Technical Field

The invention relates to the technical field of three-dimensional woven forming fabrics, in particular to a high-precision profiling control device and method for a rotary special-shaped body preform.

Background

The rotary profile body needs to adopt a profiling weaving process in the weaving and shaping process to obtain a net-size or near-size prefabricated body. When the existing manual-assisted semi-mechanized process is used for weaving, the design of the copying weaving process focuses on ensuring the continuity of fiber yarn bundles in a prefabricated body and the uniform distribution of structure variation points, the copying weaving processes such as changing the internal structure, the yarn specification and increasing and decreasing yarns of the prefabricated body are adopted, the operation is complex, the weaving efficiency is low, and the automatic weaving is difficult to realize. On the basis of systematically researching the interaction between the existing weaving process and the structure of the prefabricated body, the structural characteristics and the structural variation point distribution rule of the prefabricated body formed by the existing profiling weaving method are analyzed, the influence of various profiling weaving processes on the material performance and the weaving forming efficiency are contrastively evaluated, the profiling weaving process method suitable for efficient manufacturing is researched, and the theoretical foundation is laid for the design of a digital weaving sample piece.

Aiming at the technical problems, starting from a weaving process, by analyzing the motion rule and the microscopic interlacing structure of a yarn bundle in the weaving process, the interaction relation between the structure parameters of the prefabricated body is established, and by researching the influence of the change of the profiling weaving process on the structural variation of the prefabricated body, the design optimization of a three-dimensional weaving prefabricated body differential single-cell combination forming method and a variable-thickness and variable-width/perimeter weaving process is realized.

Disclosure of Invention

In order to solve the problems, the invention discloses a high-precision profiling control device and a method for a rotary special-shaped body preform, which aim to achieve the aim.

The invention is realized by the following technical scheme:

a high-precision profile control device and method for a revolving profile body prefabricated part comprises a yarn array, an inclined yarn guide mechanism, a heald frame, a drop yarn guide mechanism, a reed and a revolving profile body prefabricated part, wherein the inclined yarn guide mechanism is positioned on the left side of the heald frame, the vertical guide mechanisms are arranged above and below the front surface of the heald frame, the reed is positioned on the right side of the heald frame, and the yarn array comprises drop yarns arranged at the upper end and the lower end, two groups of inclined yarns positioned between the two drop yarns and two warp yarns positioned between the two groups of inclined sands; wherein the vertical yarns, the oblique yarns and the warp yarns are all positioned on the left side of the oblique yarn guide mechanism, and the rotary special-shaped body prefabricated body is positioned on the right side of the reed.

The invention further improves that: oblique sand is added in the yarn array along the thickness direction (z direction), and two groups of transverse fibers (x direction) and longitudinal fibers (y direction) which are perpendicular to each other are added in a plane which is perpendicular to the interweaving thickness direction, namely warp yarns and vertical yarns are added to form the revolution profile body prefabricated body.

The invention further improves that: each of the drop guide mechanisms is fixed to the heald frame by a moving mechanism.

A high-precision profiling control method for a rotary special-shaped body preform comprises the following steps:

s1, passing the warps and the bias yarns of the three-dimensional multilayer profiling weaving process through a reed after entering the interior of the heald frame through a bias yarn guide mechanism;

s2, the vertical yarn guiding mechanism reciprocates between the inclined yarn guiding mechanism and the reed through the heald frame and guides the vertical yarns of the upper and lower groups to respectively penetrate through the warp layer and the inclined yarn layer;

s3, the inclined yarn guiding mechanism guides inclined yarn warp yarn layers to form weft yarn layers, and finally, yarns form a rotary special-shaped body prefabricated body after a reed.

The invention further improves that: in the steps S1-S3, the control of the rotating profile body preform profile weaving process equipment involves the control of warp yarns, vertical yarns and 2 groups of oblique yarns in four directions, so as to realize the beneficial effects of the rotating profile body preform profile control method:

(1) according to the high-precision profile control technology for the rotary special-shaped body preform, through research on a three-dimensional profile weaving process technology, directional yarns are added into a yarn array along the thickness direction (z direction), and two groups of transverse fibers (x direction) and longitudinal fibers (y direction) which are perpendicular to each other are added into a plane perpendicular to the interweaving thickness direction to form the rotary special-shaped body preform, so that the weaving problems of complex operation and low weaving efficiency are solved.

(2) This gyration dysmorphism body preform high accuracy profile modeling control through the orderly control to the yarn array, has effectively prevented the yarn of gyration dysmorphism and has come off, many yarns interweave the scheduling problem, can realize the high accuracy profile modeling control of gyration dysmorphism body preform.

Drawings

FIG. 1 is a schematic diagram of a high-precision profiling control technique for a rotating profile body preform according to the present invention;

in the figure, 1-vertical yarn, 2-oblique yarn, 3-warp yarn, 4-oblique yarn guide mechanism, 5-heald frame, 6-vertical yarn guide mechanism, 7-reed and 8-rotary special-shaped body prefabricated body.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1, a high-precision profile control technique for a revolving profile body preform according to this embodiment includes a yarn array, a skew yarn guide mechanism 4, a heald frame 5, a drop yarn guide mechanism 6, a reed 7, and a revolving profile body preform 8, where the skew yarn guide mechanism 4 is located on the left side of the heald frame 5, vertical guide mechanisms 6 are provided above and below the front surface of the heald frame 5, and each drop yarn guide mechanism 6 is fixed on the heald frame 5 by a moving mechanism. The reed 7 is positioned on the right side of the heald frame 5, and the yarn array comprises vertical yarns 1 arranged at the upper end and the lower end, two groups of oblique yarns 2 positioned between the two vertical yarns 1 and two warp yarns 3 positioned between the two groups of oblique sands 2; wherein the vertical yarns 1, the oblique yarns 2 and the warp yarns 3 are all positioned on the left side of the oblique yarn guide mechanism 4, and the rotary special-shaped body prefabricated body 8 is positioned on the right side of the reed 7.

In which a diagonal sand 2 is added in the yarn array in the thickness direction (z direction) and two sets of transverse fibers (x direction) and longitudinal fibers (y direction) perpendicular to each other, i.e., warp 3 and drop 1, are added in the plane perpendicular to the interwoven thickness direction, forming a revolution profile body preform 8. And those not described in detail in this specification are well within the skill of those in the art.

The high-precision profiling control method for the rotary special-shaped body preform in the embodiment comprises the following steps:

s1, after entering the inside of a heald frame 5 through an inclined yarn guide mechanism 4, the warp 3 and the inclined yarn 2 of the three-dimensional multilayer profiling weaving process pass through a reed 7;

s2, the vertical yarn guide mechanism 6 reciprocates between the inclined yarn guide mechanism 4 and the reed 7 through the heald frame 5, and guides the vertical yarns 1 of the upper and lower groups to respectively penetrate through the warp layer and the inclined yarn layer;

s3, the inclined yarn guiding mechanism 4 guides inclined yarn warp yarn layers to form weft yarn layers, and finally, the yarns form a rotary special-shaped body prefabricated body after the reed 7.

The invention adds directional yarns in the yarn array along the z direction, and adds two groups of transverse fibers and longitudinal fibers which are vertical to each other in the plane vertical to the interweaving thickness direction to form the revolving heteromorphic fiber interwoven fabric, thereby having great significance for realizing high-precision profiling control.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.