High-roundness fiber reinforced composite material additive manufacturing base material forming method

Abstract

The invention discloses a forming method for a high-roundness fiber reinforced composite material additive manufacturing base material. A reciprocating high-frequency different-direction burr removal adsorption mechanism, an infrared contour imaging positioning mechanism, a wire positioning mechanism, a wire contour modification rotary circular hole cutter tooth mechanism, a wire surface softening mechanism and a wire shaping mechanism are included. The reciprocating high-frequency different-direction thorn-removing adsorption mechanism is provided with a first-order reciprocating high-frequency different-direction thorn-removing adsorption mechanism and a second-order reciprocating high-frequency different-direction thorn-removing adsorption mechanism, and the brush type reciprocating motion directions in the reciprocating high-frequency different-direction thorn-removing adsorption mechanism are 0 degree and 90 degrees respectively; the infrared contour imaging and positioning mechanism is used for imaging the outer contour of the wire, moving and positioning the position of the wire according to a graphic shape, and then conveying the wire to the wire contour modification rotary round hole to tooth mechanism for convex structure modification; and the wire subjected to secondary shaping is conveyed to the roundness softening and shaping mechanism, and tiny bulges on the surface of the wire are softened and shaped, so that the surface of the wire is smooth and has certain roundness.

Description

Technical Field

[0001] The invention belongs to the field of composite materials, and in particular to a method for forming a substrate by additive manufacturing of a high-roundness fiber-reinforced composite material. Technical Background

[0002] The stability of the surface quality of printing filaments plays a decisive role in the quality of printed products. Traditional printing filaments are directly rolled up after being extruded by an extruder, resulting in an uneven surface of the filaments and a grainy feel. Once the printer die is stuck, the filaments will break, affecting the stability of the product. Chinese patent CN205044186 U invented a 3D printer-specific filament breakpoint connector, which can connect the filaments at the breakpoints. However, it does not fundamentally solve the problem of filament breakage and there is a problem with the roundness of the filaments. Summary of the invention

[0003] The purpose of the present invention is to provide a method for forming a substrate for additive manufacturing of a fiber-reinforced composite material with high roundness, which can perform diversified surface treatment on the surface of short fiber printing wire online, improve the surface quality of the product, and provide reliable guarantee for continuous high-quality printing of the product.

[0004] The objective of the present invention is achieved in this way: after the short fiber printing filament is extruded by the extruder, it first enters the first-order reciprocating high-frequency anisotropic burr removal adsorption mechanism and the second-order reciprocating high-frequency anisotropic burr removal adsorption mechanism in sequence, and the main function of this area is to remove burrs on the surface of the filament; then it enters the first-order wire contour shaping rotating circular hole knife tooth mechanism and the second-order wire contour shaping rotating circular hole knife tooth mechanism, and the main function of this area is to remove the raised part on the surface of the wire; finally, the wire shaping area, the main function of this area is to reshape the surface of the wire to meet the requirements of the printer for the wire.

[0005] Furthermore, the first-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism, the brush in the first-order brush unit is made of soft copper brush or hard bristle material; the first-order negative pressure adsorption mechanism is externally connected to a conventional negative pressure device (not shown in the figure), and the removed powder can be discharged by negative pressure; the first-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism is a cylindrical structure, and 6 groups of 0° slide rails are evenly distributed on its outer side;

[0006] Furthermore, the second-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism, the brush in the second-order brush unit is made of soft copper brush or hard bristle material; the second-order negative pressure adsorption mechanism is externally connected to a conventional negative pressure device (not shown in the figure), and the removed powder can be discharged by negative pressure; the second-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism is a cylindrical structure, and 4 groups of 90° slide rails are evenly distributed on its outer side;

[0007] Furthermore, the first-level infrared contour imaging positioning mechanism is located around the wire, and the outer contour imaging of the wire is fed back to the image processing system. According to the position of the protrusion, the first-level wire positioning unit adjusts the position of the first-level wire clamping mechanism, and adjusts the position of the protrusion outside the roundness to the periphery of the circular hole in the first-level wire contour shaping rotating circular hole cutter mechanism for rough surface shaping;

[0008] Furthermore, the secondary infrared contour imaging positioning mechanism is located around the wire, and the outer contour imaging of the wire is fed back to the image processing system. According to the position of the protrusion, the secondary wire positioning unit adjusts the position of the secondary wire clamping mechanism, and adjusts the position of the protrusion outside the roundness to the periphery of the circular hole in the secondary wire contour shaping rotating circular hole knife tooth mechanism for precise surface shaping; the secondary wire contour shaping rotating circular hole knife tooth mechanism has more teeth than the primary infrared contour imaging positioning mechanism, and the arrangement is more compact;

[0009] Furthermore, the wire shaping area: this area is in the shape of a ring and surrounds the outside of the wire. This area includes four functional areas, namely, wire surface softening mechanism, high-temperature wire shaping, medium-temperature wire shaping and low-temperature wire shaping; wherein, the temperature of the wire surface softening mechanism area is the glass transition temperature of the resin matrix, the temperature of the high-temperature wire shaping area is 10-20°C higher than the glass transition temperature of the resin matrix, the medium-temperature wire shaping is 5-10°C higher than the glass transition temperature of the resin matrix, and the low-temperature wire shaping is 10-20°C lower than the glass transition temperature of the resin matrix.

[0010] The beneficial effect of the present invention is that during the molding process of the short fiber reinforced thermoplastic composite printing filament, abnormal burrs and protrusions on the material surface are removed through online surface diversification treatment, thereby ensuring that the surface of the filament is smooth, thereby improving the guarantee for continuous and efficient printing of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an overall schematic diagram.

[0012] Figure 2 It is the main section view.

[0013] 1-wire; 2-first-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism; 3-second-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism; 4-first-order infrared contour imaging positioning mechanism; 5-first-order wire positioning mechanism; 6-first-order wire contour shaping rotating circular hole tooth mechanism; 7-second-order infrared contour imaging positioning mechanism; 8-second-order wire positioning mechanism; 9-second-order wire contour shaping rotating circular hole tooth mechanism; 10-wire surface softening mechanism; 11-high-temperature wire shaping; 12-medium-temperature wire Shaping; 13- low temperature wire shaping; 201- 0° slide rail; 202- first order negative pressure adsorption; 203- first order brush unit; 301- 90° slide rail; 302- second order negative pressure adsorption; 303- second order brush unit; 401- first order infrared profile imaging mechanism; 501- first order wire positioning unit; 502- first order wire clamping mechanism; 701- second order infrared profile imaging mechanism; 801- second order wire positioning unit; 802- second order wire clamping mechanism.

[0014] Specific examples

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1 and 2 As shown, the invention discloses a method for forming a substrate for additive manufacturing of a fiber-reinforced composite material with high roundness, comprising a first-order reciprocating high-frequency anisotropic burr removal adsorption mechanism (2); a second-order reciprocating high-frequency anisotropic burr removal adsorption mechanism (3); a first-order infrared contour imaging positioning mechanism (4); a first-order wire positioning mechanism (5); a first-order wire contour shaping rotating circular hole tooth mechanism (6); a second-order infrared contour imaging positioning mechanism (7); a second-order wire positioning mechanism (8); a second-order wire contour shaping rotating circular hole tooth mechanism (9); a wire surface softening mechanism (10); a high-temperature wire shaping (11); a medium-temperature wire shaping (12); and a low-temperature wire shaping (13);

[0017] The wire 1 enters the first-order reciprocating high-frequency anisotropic burr removal adsorption mechanism 2, and the first-order brush unit 203 performs high-frequency reciprocating motion along the pulling direction (0° direction) of the wire 1, and the removed burrs are sucked away by the first-order negative pressure adsorption mechanism 202; after that, the wire 1 enters the second-order reciprocating high-frequency anisotropic burr removal adsorption mechanism 3, and the second-order brush unit 303 performs high-frequency reciprocating motion perpendicular to the pulling direction (90° direction) of the wire 1, and the removed burrs are sucked away by the second-order negative pressure adsorption mechanism 202;

[0018] The wire 1 enters the first-level infrared contour imaging positioning mechanism 4, and the first-level infrared contour imaging mechanism 401 images the outer contour of the wire 1 in the image processor; according to the shape of the abnormal protrusion on the surface of the wire 1, the first-level wire positioning unit 501 adjusts the position of the first-level wire clamping mechanism 502, and then the wire 1 enters the first-level wire contour shaping rotating circular hole knife tooth mechanism 6 to cut the abnormal protrusion; then, the wire 1 enters the second-level infrared contour imaging positioning mechanism 7, and the second-level infrared contour imaging mechanism 701 images the outer contour of the wire 1 in the image processor; according to the shape of the abnormal protrusion on the surface of the wire 1, the second-level wire positioning unit 801 adjusts the position of the first-level wire clamping mechanism 802, and then the wire 1 enters the second-level wire contour shaping rotating circular hole knife tooth mechanism 9 to complete the cutting of the abnormal protrusion;

[0019] After the wire 1 enters the wire surface softening mechanism 10 , it enters the high-temperature wire shaping 11 , the medium-temperature wire shaping 12 and the low-temperature wire shaping 13 in sequence, and finally the roundness of the wire 1 is shaped.

[0020] The above description is only for the preferred embodiment of the present invention, or is understood as explaining the technical principle of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for forming a substrate for additive manufacturing of a fiber-reinforced composite material with high roundness, comprising a first-order reciprocating high-frequency anisotropic burr removal adsorption mechanism (2); a second-order reciprocating high-frequency anisotropic burr removal adsorption mechanism (3); a first-order infrared contour imaging positioning mechanism (4); a first-order wire positioning mechanism (5); a first-order wire contour shaping rotating circular hole tooth mechanism (6); a second-order infrared contour imaging positioning mechanism (7); a second-order wire positioning mechanism (8); a second-order wire contour shaping rotating circular hole tooth mechanism (9); a wire surface softening mechanism (10); a high-temperature wire shaping (11); a medium-temperature wire shaping (12); and a low-temperature wire shaping (13); The wire (1) enters the first-order reciprocating high-frequency anisotropic burr removal adsorption mechanism (2), and the first-order brush unit (203) performs high-frequency reciprocating motion along the pulling direction (0° direction) of the wire (1), and the removed burrs are sucked away by the first-order negative pressure adsorption mechanism (202); thereafter, the wire (1) enters the second-order reciprocating high-frequency anisotropic burr removal adsorption mechanism (3), and the second-order brush unit (303) performs high-frequency reciprocating motion perpendicular to the pulling direction (90° direction) of the wire (1), and the removed burrs are sucked away by the second-order negative pressure adsorption mechanism (202); The wire (1) enters the first-level infrared contour imaging positioning mechanism (4), and the first-level infrared contour imaging mechanism (401) images the outer contour of the wire (1) in an image processor; According to the shape of the abnormal protrusion on the surface of the wire (1), the first-level wire positioning unit (501) adjusts the orientation of the first-level wire clamping mechanism (502), after which the wire (1) enters the first-level wire contour shaping rotating circular hole cutter mechanism (6) to cut the abnormal protrusion; then, the wire (1) enters the second-level infrared contour imaging positioning mechanism (7), and the second-level infrared contour imaging mechanism (701) images the outer contour of the wire (1) in the image processor; According to the shape of the abnormal protrusion on the surface of the wire (1), the secondary wire positioning unit (801) adjusts the orientation of the primary wire clamping mechanism (802), after which the wire (1) enters the secondary wire contour shaping rotating circular hole cutter mechanism (9) to complete the cutting of the abnormal protrusion; After the wire (1) enters the wire surface softening mechanism (10), it sequentially enters the high-temperature wire shaping (11), the medium-temperature wire shaping (12) and the low-temperature wire shaping (13), and finally achieves shaping of the roundness of the wire (1).

2. A method for forming a substrate for additive manufacturing of a fiber-reinforced composite material with high roundness according to claim 1, characterized in that The first-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism (2) has a first-order brush unit (203) in which the brush is made of soft copper brush or hard bristle material; the first-order negative pressure adsorption mechanism (202) is externally connected to a conventional negative pressure device (not shown in the figure) to discharge the removed powder through the negative pressure effect; the first-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism (2) is a cylindrical structure, and 6 groups of 0° slide rails (201) are evenly distributed on the outer side thereof.

3. The method for forming a substrate for additive manufacturing of a fiber-reinforced composite material with high roundness according to claim 1, characterized in that The second-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism (3) has a second-order brush unit (303) in which the brush is made of soft copper brush or hard bristle material; the second-order negative pressure adsorption mechanism (302) is externally connected to a conventional negative pressure device (not shown in the figure) to discharge the removed powder through the negative pressure effect; the second-order reciprocating high-frequency anisotropic thorn removal adsorption mechanism (2) is a cylindrical structure, and 4 groups of 90° slide rails (301) are evenly distributed on the outside thereof.

4. The method for forming a substrate for additive manufacturing of a fiber-reinforced composite material with high roundness according to claim 1, characterized in that The first-level infrared contour imaging positioning mechanism (4) is located around the wire (1), and the outer contour imaging of the wire (1) is fed back to the image processing system. According to the position of the protrusion, the first-level wire positioning unit (501) adjusts the position of the first-level wire clamping mechanism (502), and adjusts the position of the protrusion outside the roundness to the periphery of the circular hole in the first-level wire contour shaping rotating circular hole cutter mechanism (6) to perform rough surface shaping.

5. The method for forming a substrate for additive manufacturing of a fiber-reinforced composite material with high roundness according to claim 1, characterized in that The secondary infrared contour imaging positioning mechanism (7) is located around the wire (1) and feeds back the outer contour imaging of the wire (1) to the image processing system. According to the position of the protrusion, the secondary wire positioning unit (801) adjusts the position of the secondary wire clamping mechanism (802) to adjust the position of the protrusion outside the roundness to the periphery of the circular hole in the secondary wire contour shaping rotating circular hole knife tooth mechanism (6) for precise surface shaping. The secondary wire contour shaping rotating circular hole knife tooth mechanism (6) has more teeth than the primary infrared contour imaging positioning mechanism (4) and is arranged more closely.

6. The method for forming a substrate for additive manufacturing of a fiber-reinforced composite material with high roundness according to claim 1, characterized in that Wire shaping area: This area is in the shape of a ring and surrounds the outside of the wire (1). This area includes four functional areas, namely a wire surface softening mechanism (10), a high temperature wire shaping (11), a medium temperature wire shaping (12) and a low temperature wire shaping (13); wherein the temperature of the wire surface softening mechanism (10) area is the glass transition temperature of the resin matrix, the temperature of the high temperature wire shaping (11) area is 10-20°C higher than the glass transition temperature of the resin matrix, the temperature of the medium temperature wire shaping (12) is 5-10°C higher than the glass transition temperature of the resin matrix, and the temperature of the low temperature wire shaping (13) is 10-20°C lower than the glass transition temperature of the resin matrix.

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