An Interference Suppression Method for the Laser In-Situ Forming Pressure Roller and the Core Die Shaft of a Composite Material Prepreg Tape

Abstract

The present invention discloses a method for suppressing the interference between the laser in-situ forming pressure roller and the mandrel shaft of a composite material prepreg tape. By establishing the coordinate system of the laser in-situ forming equipment, on the basis of determining the characteristic points and characteristic parameters of the composite material prepreg tape, the simulation software is used to determine the coordinates of the laying trajectory points and the distance between them and the nearest points on the polar hole circle of the mandrel shaft, so as to determine the laying paths of the composite material prepreg tape and the pressure roller. This method effectively solves the problem of collision interference between the pressure roller and the mandrel shaft during the forming of the head part of the composite material component, and effectively improves the forming quality and efficiency of the thermoplastic carbon fiber composite material component.

Description

Technical Field

[0001] The present invention relates to a method for suppressing the interference between a laser in-situ forming pressure roller and a mandrel shaft of a composite material prepreg tape, belonging to the technical field of additive manufacturing of composite materials. Background Art

[0002] In the forming and manufacturing of thermoplastic carbon fiber composite materials, the width of the pressure roller is usually larger than the width of the thermoplastic carbon fiber composite material prepreg tape. The thermoplastic carbon fiber composite material prepreg tape is located near the center of the pressure roller, and it is easy to have a collision interference between the laying pressure roller and the mandrel shaft. In the light case, it will lead to the deviation of the laying wire shape and the fluctuation of the pressure roller pressure. In the heavy case, the metal joint will be damaged, and the pressure roller support arm will break. To avoid the collision interference between the pressure roller and the mandrel shaft during laying and forming, the thermoplastic carbon fiber composite material prepreg tape is often far away from the mandrel shaft, and it is impossible to cut the root, resulting in incomplete forming and affecting the performance of the component. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the present invention provides a method for suppressing the interference between a laser in-situ forming pressure roller and a mandrel shaft of a composite material prepreg tape, and determines the movement trajectory of the pressure roller according to the laying planning trajectory of the composite material prepreg tape, so as to eliminate the interference collision problem between the pressure roller and the mandrel shaft.

[0004] As shown in the attached Figure 1 figure, a method for suppressing the interference between a laser in-situ forming pressure roller and a mandrel shaft of a composite material prepreg tape provided by the present invention includes the following steps:

[0005] The first step is to establish a coordinate system for the laser in-situ forming equipment;

[0006] The second step is to determine the width ω of the composite material prepreg tape and the length W of the pressure roller bus, where ω ≤ W ≤ 2ω;

[0007] The third step is to determine the spatial coordinates O i (x, y) of the bonding center point C of the composite material prepreg tape, the center point H of the pressure roller bus, and the point on the mandrel shaft polar hole circle;

[0008] The fourth step is to use the laying simulation software to determine the coordinates I i (x, y) of each laying trajectory point;

[0009] The fifth step is to calculate the distance d between each laying trajectory point I i (x, y) and the nearest point O on the mandrel shaft polar hole circle;

[0010] The sixth step is that if d ≥ W, the composite material prepreg tape is laid normally according to the laying trajectory; if d < W, the composite material prepreg tape is pushed by an external force to move towards or away from the mandrel shaft polar hole circle, and the distances between the H point, the C point and the nearest point O on the mandrel shaft polar hole circle on the laying surface are kept at W / 2 and ω / 2 respectively.

[0011] Beneficial effects: The method for suppressing the interference between the laser in-situ forming pressure roller and the core die shaft of a composite material prepreg tape provided by the present invention can effectively solve the problem of collision interference between the pressure roller and the core die shaft during the forming of the head part of a composite material component, and effectively improve the forming quality and efficiency of thermoplastic carbon fiber composite material components. Description of the drawings

[0012] Figure 1 It is a schematic flow chart of a method for suppressing the interference between the laser in-situ forming pressure roller and the core die shaft of a composite material prepreg tape. Detailed implementation manners

[0013] Example 1 A method for suppressing the interference between the laser in-situ forming pressure roller and the core die shaft of a composite material prepreg tape.

[0014] As shown in the Figure 1 accompanying drawings, a method for suppressing the interference between the laser in-situ forming pressure roller and the core die shaft of a composite material prepreg tape provided by the present invention includes the following steps:

[0015] First step, establish the coordinate system of the laser in-situ forming equipment;

[0016] Second step, determine the width ω of the composite material prepreg tape and the length W of the pressure roller bus, where ω ≤ W ≤ 2ω;

[0017] Third step, determine the spatial coordinates O i (x, y) of the bonding center point C of the composite material prepreg tape, the center point H of the pressure roller bus, and the point on the polar hole circle of the core die shaft;

[0018] Fourth step, use the laying simulation software to determine the coordinates I i (x, y) of each laying trajectory point;

[0019] Fifth step, calculate the distance d between each laying trajectory point I i (x, y) and the nearest point O on the polar hole circle of the core die shaft;

[0020] Sixth step, if d ≥ W, the composite material prepreg tape is laid normally according to the laying trajectory; if d < W, the composite material prepreg tape is pushed by an external force to move towards or away from the polar hole circle of the core die shaft, and the distances between point H, point C and the nearest point O on the polar hole circle of the core die shaft on the laying surface are kept as W / 2 and ω / 2 respectively.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An interference suppression method for the laser in-situ forming pressure roller and the core mold shaft of a composite material prepreg tape, characterized in that, it includes the following steps: The first step is to establish the coordinate system of the laser in-situ forming equipment; The second step is to determine the width ω of the composite material prepreg tape and the length W of the pressure roller busbar, where ω ≤ W ≤ 2ω; Step 3: Determine the spatial coordinates O of the bonding center point C of the composite prepreg tape, the center point H of the pressure roller generatrix, and the point on the polar hole circle of the mandrel shaft i (x, y); Step 4: Use the placement simulation software to determine the coordinates I of each placement trajectory point i (x, y); Step 5: Calculate the laying trajectory points I i (x, y) and the distance d from the nearest point O on the polar hole circle of the mandrel axis; The sixth step is that if d ≥ W, the composite material prepreg tape is normally laid according to the laying trajectory; If d < W, the composite material prepreg tape is pushed by an external force to move towards or away from the polar hole circle of the core mold shaft, and the distances between points H and C on the laying surface and the nearest point O on the polar hole circle of the core mold shaft are kept at W / 2 and ω / 2 respectively.

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