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CN117359931A - Thermoplastic carbon fiber composite material laser 3D printing method and printing head - Google Patents

Thermoplastic carbon fiber composite material laser 3D printing method and printing head
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Publication number
CN117359931A
CN117359931ACN202311589593.5ACN202311589593ACN117359931ACN 117359931 ACN117359931 ACN 117359931ACN 202311589593 ACN202311589593 ACN 202311589593ACN 117359931 ACN117359931 ACN 117359931A
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carbon fiber
prepreg tape
laser
pressure roller
prepreg
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尤鹏翔
王菲
张承双
包艳玲
李玉瑶
阮英波
刘冬
张承灏
田明
罗宽
曾金芳
苏忠民
侯晓
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Changchun University of Science and Technology
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Changchun University of Science and Technology
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Abstract

Translated fromChinese

本发明公开了一种热塑性碳纤维复合材料激光3D打印方法与打印头,将碳纤维丝束与热塑性树脂熔融浸渍、预浸带挤压输出、激光加热和压辊辊压铺叠相结合,提升了铺叠构件表面平整度和成型精度,消除了铺层与基底层间的界面,进而提高了成型构件的孔隙率和层间剪切强度。

The invention discloses a thermoplastic carbon fiber composite laser 3D printing method and a print head, which combine carbon fiber tow and thermoplastic resin melt impregnation, prepreg tape extrusion output, laser heating and pressure roller rolling lay-up, thereby improving the laying efficiency. The surface flatness and forming accuracy of the laminated components are improved, and the interface between the laminate and the base layer is eliminated, thereby improving the porosity and interlayer shear strength of the formed components.

Description

Translated fromChinese
一种热塑性碳纤维复合材料激光3D打印方法与打印头A laser 3D printing method and print head for thermoplastic carbon fiber composite materials

技术领域Technical field

本发明涉及一种热塑性碳纤维复合材料激光3D打印方法与打印头,属于激光与增材制造技术领域。The invention relates to a thermoplastic carbon fiber composite laser 3D printing method and a print head, and belongs to the technical field of laser and additive manufacturing.

背景技术Background technique

热塑性碳纤维复合材料3D打印成型制造分为铺带和铺丝两种成型方式,铺带式3D打印成型需要预先将碳纤维和热塑性材料制作成预浸带,工艺复杂成本高,无法满足外场灵活应用需求。铺丝式3D打印成型是打印时现场将碳纤维丝和热塑性材料同时送入熔融腔体内实时浸渍并挤出铺叠,表面不平整且成型精度低,铺叠时由于底层树脂冷却而导致铺层与基底层间存在界面,从而使成型构件的孔隙率提高,层间剪切强度降低,严重影响成型构件的力学性能。The 3D printing and manufacturing of thermoplastic carbon fiber composite materials is divided into two molding methods: tape laying and filament laying. Tape-laying 3D printing requires carbon fiber and thermoplastic materials to be made into prepreg tapes in advance. The process is complex and costly, and it cannot meet the needs of flexible field applications. . Filament-laying 3D printing involves feeding carbon fiber filaments and thermoplastic materials into the melting cavity on-site at the same time for real-time impregnation and extrusion during printing. The surface is uneven and the molding accuracy is low. During the laying-up process, due to the cooling of the underlying resin, the layer and the There is an interface between the base layers, which increases the porosity of the formed component and reduces the interlayer shear strength, seriously affecting the mechanical properties of the formed component.

发明内容Contents of the invention

针对现有技术存在的不足,本发明提供了一种热塑性碳纤维复合材料激光3D打印方法与打印头,将碳纤维丝束与热塑性树脂熔融浸渍、预浸带挤压输出、激光加热和压辊辊压铺叠相结合来提升铺叠构件表面平整度和成型精度,消除铺层与基底层间的界面,进而提高成型构件的孔隙率和层间剪切强度。In view of the shortcomings of the existing technology, the present invention provides a thermoplastic carbon fiber composite laser 3D printing method and a print head, which melt and impregnate the carbon fiber tow with the thermoplastic resin, extrusion and output of the prepreg tape, laser heating and pressure roller pressing. The combination of lamination can improve the surface flatness and molding accuracy of the laminate components, eliminate the interface between the laminate layer and the base layer, and thereby improve the porosity and interlayer shear strength of the molded components.

为实现上述目的,如附图1和附图2所示,本发明采用的技术方案如下:In order to achieve the above objects, as shown in accompanying drawings 1 and 2, the technical solutions adopted by the present invention are as follows:

一种热塑性碳纤维复合材料激光3D打印方法,该方法是采用齿轮副间隙啮合滚动方式将条状热塑性树脂材料输送到电热管604内部,连续碳纤维丝束经过展丝轮对被输送到电热管604内部,热塑性树脂材料在电热管604内部被加热融化成熔融态,熔融的热塑性树脂浸润连续碳纤维丝束形成热塑性碳纤维复合材料预浸料;热塑性碳纤维复合材料预浸料在挤压轮对606的挤压下均匀挤出并冷却形成薄片状预浸带,该预浸带通过预浸带导向槽7被传送到铺叠压辊下;采用光场分布均匀的激光束辐照加热预浸带铺层与基底层的接触位置,使预浸带铺层下表面和基底层上表面的树脂融化,在铺叠压辊的铺叠辊压下冷却成型。A method of laser 3D printing of thermoplastic carbon fiber composite materials. This method uses a gear pair gap meshing and rolling method to transport strip-shaped thermoplastic resin materials to the inside of the electric heating tube 604. The continuous carbon fiber tow is transported to the inside of the electric heating tube 604 through the spreading wheel pair. , the thermoplastic resin material is heated and melted into a molten state inside the electric heating tube 604, and the molten thermoplastic resin infiltrates the continuous carbon fiber tow to form a thermoplastic carbon fiber composite prepreg; the thermoplastic carbon fiber composite prepreg is extruded by the extrusion wheel pair 606 The prepreg tape is evenly extruded and cooled to form a sheet-like prepreg tape. The prepreg tape is transported to the layup press roller through the prepreg tape guide groove 7; a laser beam with uniform light field distribution is used to irradiate and heat the prepreg tape layup and The contact position of the base layer melts the resin on the lower surface of the prepreg tape layer and the upper surface of the base layer, and is cooled and formed under the pressure of the layup roller.

一种热塑性碳纤维复合材料激光3D打印头,该打印头包括控制器1、激光加热头2、红外测温模块3、液压单元4、压辊单元5、预浸带制备单元6、预浸带导向槽7和预浸带裁剪单元8;A thermoplastic carbon fiber composite laser 3D printing head, which includes a controller 1, a laser heating head 2, an infrared temperature measurement module 3, a hydraulic unit 4, a pressure roller unit 5, a prepreg preparation unit 6, and a prepreg guide Tank 7 and prepreg tape cutting unit 8;

所述的控制器1为单片机控制器,用于实现对激光加热头2和红外测温模块3的控制和数据采集,对液压单元4中液压油缸的伸缩控制,对预浸带制备单元6和预浸带裁剪单元8的控制;The controller 1 is a single-chip microcomputer controller, used to realize the control and data collection of the laser heating head 2 and the infrared temperature measurement module 3, the telescopic control of the hydraulic cylinder in the hydraulic unit 4, and the prepreg tape preparation unit 6 and Control of prepreg tape cutting unit 8;

所述的激光加热头2由光纤传输的连续激光器和光束整形器组成,激光加热头2的输出光纤头与光束整形器一起固定在压辊单元5的压辊架上,连续激光器输出的光束经过光束整形器后输出光场分布均匀的方形激光光斑,用于辐照加热预浸带与基底层的接触位置,使预浸带下表面和基底层上表面的树脂融化;所述的光纤传输的连续激光器优选红外波段的光纤传输半导体激光器或光纤激光器;The laser heating head 2 is composed of a fiber-transmitted continuous laser and a beam shaper. The output fiber head of the laser heating head 2 is fixed on the pressure roller frame of the pressure roller unit 5 together with the beam shaper. The beam output by the continuous laser passes through The beam shaper outputs a square laser spot with uniform light field distribution, which is used to irradiate and heat the contact position between the prepreg tape and the base layer to melt the resin on the lower surface of the prepreg tape and the upper surface of the base layer; the optical fiber transmission The continuous laser is preferably a fiber transmission semiconductor laser or fiber laser in the infrared band;

所述的红外测温模块3为红外测温仪,固定在压辊单元5的压辊架上,用于测量激光加热头2辐照部位的温度;The infrared temperature measurement module 3 is an infrared thermometer, which is fixed on the pressure roller frame of the pressure roller unit 5 and is used to measure the temperature of the irradiation part of the laser heating head 2;

所述的液压单元4为两路输出的液压执行模块,每一路输出均由调压阀和液压油缸组成,通过调压阀调节液压油缸的输出压力;在控制器1的控制下,其中一路输出通过该路的液压油缸实现压辊单元5的加载和卸载,从而达到不同铺叠辊压压力的输出,另外一路输出通过该路的液压油缸实现对挤压轮对606内挤出压力的调节;The hydraulic unit 4 is a hydraulic execution module with two outputs. Each output is composed of a pressure regulating valve and a hydraulic cylinder. The output pressure of the hydraulic cylinder is adjusted through the pressure regulating valve; under the control of the controller 1, one of the outputs The hydraulic cylinder of this path is used to load and unload the pressure roller unit 5, thereby achieving the output of different lamination roller pressures, and the other output is used to adjust the extrusion pressure in the extrusion wheel pair 606 through the hydraulic cylinder of this path;

所述的压辊单元5由压辊架、铺叠压辊和支撑杆组成,通过压辊架将来自液压单元4输出的铺叠压力传递给铺叠压辊,通过支撑杆固定激光加热头2、红外测温模块3、预浸带导向槽7和预浸带裁剪单元8;The pressure roller unit 5 is composed of a pressure roller frame, a layup pressure roller and a support rod. The layup pressure output from the hydraulic unit 4 is transmitted to the layup pressure roller through the pressure roller frame, and the laser heating head 2 is fixed through the support rod. , infrared temperature measurement module 3, prepreg tape guide groove 7 and prepreg tape cutting unit 8;

所述的预浸带制备单元6由树脂供应模块601、碳纤维供应模块602、测温传感器603、电热管604、浸渍腔体605和挤压轮对606组成;所述的树脂供应模块601由树脂固定架、直流电机和间隙啮合的齿轮副组成,直流电机在控制器1的控制下带动齿轮副旋转挤压出树脂线材并输送至电热管604中;所述的碳纤维供应模块602由碳纤维架和展丝轮对组成,悬挂在碳纤维架上的碳纤维丝束在挤压轮对606旋转挤出形成的牵引力牵拉下经过展丝轮对进入电热管604中,展丝轮对将碳纤维丝束展平;所述的测温传感器603为接触式温度传感器,用于测量电热管604外侧温度,并将获取的温度数据传送给控制器1;所述的电热管604为电加热线圈卷绕的管状加热器,在控制器1的控制下加热热塑性树脂至熔融态,碳纤维丝束与热塑性树脂在电热管604的内侧熔融浸渍;所述的浸渍腔体605为不锈钢材质中空的腔体管,其管壁上固定测温传感器603,管内侧夹持电热管604;所述的挤压轮对606由两个辊轮和伺服电机组成,固定在浸渍腔体605的下侧;所述的两个辊轮分别被伺服电机驱动旋转且转向相反,转动线速度与压辊单元5中的铺叠压辊运动线速度相同,在液压单元4中液压油缸的压力推动下将浸润后的热塑性碳纤维复合材料预浸料均匀挤出形成预浸带;The prepreg tape preparation unit 6 is composed of a resin supply module 601, a carbon fiber supply module 602, a temperature sensor 603, an electric heating tube 604, an impregnation cavity 605 and an extrusion wheel pair 606; the resin supply module 601 is composed of resin The DC motor is composed of a fixed frame, a DC motor and a gear pair with clearance meshing. Under the control of the controller 1, the DC motor drives the gear pair to rotate, squeeze out the resin wire and transport it to the electric heating tube 604; the carbon fiber supply module 602 is composed of a carbon fiber frame and The carbon fiber tow suspended on the carbon fiber frame is pulled by the traction force formed by the rotation and extrusion of the extrusion wheel pair 606 and enters the electric heating tube 604 through the spreading wheel pair. The carbon fiber tow is spread by the spreading wheel pair. Flat; the temperature sensor 603 is a contact temperature sensor, used to measure the temperature outside the electric heating tube 604, and transmit the obtained temperature data to the controller 1; the electric heating tube 604 is a tubular shape wound with an electric heating coil The heater heats the thermoplastic resin to a molten state under the control of the controller 1, and the carbon fiber tow and the thermoplastic resin are melted and impregnated inside the electric heating tube 604; the impregnation cavity 605 is a hollow cavity tube made of stainless steel, and its tube The temperature sensor 603 is fixed on the wall, and the electric heating tube 604 is clamped on the inside of the tube; the extrusion wheel pair 606 is composed of two rollers and a servo motor, and is fixed on the lower side of the impregnation cavity 605; the two rollers The wheels are driven to rotate by servo motors and rotate in opposite directions. The linear speed of rotation is the same as the linear speed of the layup roller movement in the pressure roller unit 5. The wetted thermoplastic carbon fiber composite material is preformed under the pressure of the hydraulic cylinder in the hydraulic unit 4. The impregnation material is evenly extruded to form a prepreg tape;

所述的预浸带导向槽7为开一条凹槽的长方体铝块,凹槽宽度为预浸带制备单元6挤出的预浸带宽度,凹槽深度不大于1mm,固定在压辊单元5的支撑杆上,保证在铺叠时预浸带制备单元6挤出的预浸带与凹槽底部平行,用于将预浸带输送到压辊的下面;The prepreg guide groove 7 is a rectangular aluminum block with a groove. The groove width is the width of the prepreg tape extruded by the prepreg preparation unit 6. The groove depth is not more than 1mm and is fixed on the pressure roller unit 5. On the support rod, ensure that the prepreg tape extruded by the prepreg tape preparation unit 6 is parallel to the bottom of the groove during layup, and is used to transport the prepreg tape to the underside of the pressure roller;

所述的预浸带裁剪单元8由舵机和刀片组成,固定在预浸带导向槽7的顶部,用于对预浸带进行剪切。The prepreg tape cutting unit 8 is composed of a steering gear and a blade, is fixed on the top of the prepreg tape guide groove 7, and is used to cut the prepreg tape.

有益效果:本发明提供的一种热塑性碳纤维复合材料激光3D打印方法与打印头,将碳纤维丝束与热塑性树脂熔融浸渍、预浸带挤压输出、激光加热和压辊辊压铺叠相结合,提升了铺叠构件表面平整度和成型精度,消除了铺层与基底层间的界面,进而提高了成型构件的孔隙率和层间剪切强度。Beneficial effects: The invention provides a thermoplastic carbon fiber composite laser 3D printing method and print head, which combines carbon fiber tow and thermoplastic resin melt impregnation, prepreg tape extrusion output, laser heating and pressure roller roll lamination. It improves the surface flatness and forming accuracy of the laminated components, eliminates the interface between the laminated layer and the base layer, and thereby improves the porosity and interlayer shear strength of the formed components.

附图说明Description of the drawings

图1是一种热塑性碳纤维复合材料激光3D打印方法流程图。Figure 1 is a flow chart of a laser 3D printing method for thermoplastic carbon fiber composite materials.

图2是一种热塑性碳纤维复合材料激光3D打印头组成框图。Figure 2 is a block diagram of a thermoplastic carbon fiber composite laser 3D printing head.

图中:1-控制器,2-激光加热头,3-红外测温模块,4-液压单元,5-压辊单元,6-预浸料制备单元,7-预浸料导向槽,8-预浸带裁剪单元,601-树脂供应模块,602-碳纤维供应模块,603-测温传感器,604-电热管,605-浸渍腔体,606-挤压轮对。In the picture: 1-controller, 2-laser heating head, 3-infrared temperature measurement module, 4-hydraulic unit, 5-pressure roller unit, 6-prepreg preparation unit, 7-prepreg guide tank, 8- Prepreg tape cutting unit, 601-resin supply module, 602-carbon fiber supply module, 603-temperature sensor, 604-electric heating tube, 605-impregnation chamber, 606-extrusion wheel set.

具体实施方式Detailed ways

实施例1一种热塑性碳纤维复合材料激光3D打印方法与打印头。Embodiment 1 A thermoplastic carbon fiber composite laser 3D printing method and print head.

为实现上述目的,如附图1所示,本发明采用的技术方案如下:In order to achieve the above object, as shown in Figure 1, the technical solution adopted by the present invention is as follows:

一种热塑性碳纤维复合材料激光3D打印方法,该方法是采用齿轮副间隙啮合滚动方式将条状热塑性树脂材料PEEK输送到电热管604内部,1K连续碳纤维丝束经过展丝轮对被输送到电热管604内部,热塑性树脂材料PEEK在电热管604内部被加热融化成熔融态,熔融的热塑性树脂浸润连续碳纤维丝束形成热塑性碳纤维复合材料预浸料;热塑性碳纤维复合材料预浸料在挤压轮对606的挤压下均匀挤出并冷却形成薄片状预浸带,该预浸带通过预浸带导向槽7被传送到铺叠压辊下;采用光场分布均匀的激光束辐照加热预浸带铺层与基底层的接触位置,加热温度为400℃±10℃,使预浸带铺层下表面和基底层上表面的树脂融化,在铺叠压辊的铺叠辊压下冷却成型,铺叠压辊的铺叠压力为200N。A method of laser 3D printing of thermoplastic carbon fiber composite materials. This method uses a gear pair gap meshing and rolling method to transport strip thermoplastic resin material PEEK to the inside of the electric heating tube 604. The 1K continuous carbon fiber tow is transported to the electric heating tube through the spreading wheel pair. Inside 604, the thermoplastic resin material PEEK is heated and melted into a molten state inside the electric heating tube 604. The molten thermoplastic resin infiltrates the continuous carbon fiber tow to form a thermoplastic carbon fiber composite prepreg; the thermoplastic carbon fiber composite prepreg is extruded in the extrusion wheel set 606 The prepreg tape is evenly extruded and cooled under the extrusion to form a sheet-like prepreg tape. The prepreg tape is transported to the layup press roller through the prepreg tape guide groove 7; the prepreg tape is heated by laser beam irradiation with uniform light field distribution. At the contact point between the laminate and the base layer, the heating temperature is 400℃±10℃, so that the resin on the lower surface of the prepreg tape laminate and the upper surface of the base layer melts, and is cooled and formed under the pressure of the lamination roller. The laminating pressure of the laminating roller is 200N.

如附图2所示,一种热塑性碳纤维复合材料激光3D打印头,该打印头包括控制器1、激光加热头2、红外测温模块3、液压单元4、压辊单元5、预浸带制备单元6、预浸带导向槽7和预浸带裁剪单元8;As shown in Figure 2, a thermoplastic carbon fiber composite laser 3D printing head includes a controller 1, a laser heating head 2, an infrared temperature measurement module 3, a hydraulic unit 4, a pressure roller unit 5, and prepreg tape preparation Unit 6, prepreg tape guide groove 7 and prepreg tape cutting unit 8;

所述的控制器1为单片机控制器,用于实现对激光加热头2和红外测温模块3的控制和数据采集,对液压单元4中液压油缸的伸缩控制,对预浸带制备单元6和预浸带裁剪单元8的控制;The controller 1 is a single-chip microcomputer controller, used to realize the control and data collection of the laser heating head 2 and the infrared temperature measurement module 3, the telescopic control of the hydraulic cylinder in the hydraulic unit 4, and the prepreg tape preparation unit 6 and Control of prepreg tape cutting unit 8;

所述的激光加热头2由光纤传输的连续激光器和光束整形器组成,激光加热头2的输出光纤头与光束整形器一起固定在压辊单元5的压辊架上,连续激光器输出的光束经过光束整形器后输出光场分布均匀的方形激光光斑,用于辐照加热预浸带与基底层的接触位置,使预浸带下表面和基底层上表面的树脂融化;所述的光纤传输的连续激光器为红外波段的光纤传输半导体激光器或光纤激光器;The laser heating head 2 is composed of a fiber-transmitted continuous laser and a beam shaper. The output fiber head of the laser heating head 2 is fixed on the pressure roller frame of the pressure roller unit 5 together with the beam shaper. The beam output by the continuous laser passes through The beam shaper outputs a square laser spot with uniform light field distribution, which is used to irradiate and heat the contact position between the prepreg tape and the base layer to melt the resin on the lower surface of the prepreg tape and the upper surface of the base layer; the optical fiber transmission Continuous lasers are fiber-transmitted semiconductor lasers or fiber lasers in the infrared band;

所述的红外测温模块3为红外测温仪,固定在压辊单元5的压辊架上,用于测量激光加热头2辐照部位的温度;The infrared temperature measurement module 3 is an infrared thermometer, which is fixed on the pressure roller frame of the pressure roller unit 5 and is used to measure the temperature of the irradiation part of the laser heating head 2;

所述的液压单元4为两路输出的液压执行模块,每一路输出均由调压阀和液压油缸组成,通过调压阀调节液压油缸的输出压力;在控制器1的控制下,其中一路输出通过该路的液压油缸实现压辊单元5的加载和卸载,从而达到不同铺叠辊压压力的输出,另外一路输出通过该路的液压油缸实现对挤压轮对606内挤出压力的调节;The hydraulic unit 4 is a hydraulic execution module with two outputs. Each output is composed of a pressure regulating valve and a hydraulic cylinder. The output pressure of the hydraulic cylinder is adjusted through the pressure regulating valve; under the control of the controller 1, one of the outputs The hydraulic cylinder of this path is used to load and unload the pressure roller unit 5, thereby achieving the output of different lamination roller pressures, and the other output is used to adjust the extrusion pressure in the extrusion wheel pair 606 through the hydraulic cylinder of this path;

所述的压辊单元5由压辊架、铺叠压辊和支撑杆组成,通过压辊架将来自液压单元4输出的200N铺叠压力传递给铺叠压辊,通过支撑杆固定激光加热头2、红外测温模块3、预浸带导向槽7和预浸带裁剪单元8;The pressure roller unit 5 is composed of a pressure roller frame, a layup pressure roller and a support rod. The 200N layup pressure output from the hydraulic unit 4 is transmitted to the layup pressure roller through the pressure roller frame, and the laser heating head is fixed through the support rod. 2. Infrared temperature measurement module 3, prepreg tape guide groove 7 and prepreg tape cutting unit 8;

所述的预浸带制备单元6由树脂供应模块601、碳纤维供应模块602、测温传感器603、电热管604、浸渍腔体605和挤压轮对606组成;所述的树脂供应模块601由树脂固定架、直流电机和间隙啮合的齿轮副组成,直流电机在控制器1的控制下带动齿轮副旋转挤压出树脂线材并输送至电热管604中;所述的碳纤维供应模块602由碳纤维架和展丝轮对组成,悬挂在碳纤维架上的碳纤维丝束在挤压轮对606旋转挤出形成的牵引力牵拉下经过展丝轮对进入电热管604中,展丝轮对将碳纤维丝束展平;所述的测温传感器603为接触式温度传感器,用于测量电热管604外侧温度,并将获取的温度数据传送给控制器1;所述的电热管604为电加热线圈卷绕的管状加热器,在控制器1的控制下加热热塑性树脂至熔融态,碳纤维丝束与热塑性树脂在电热管604的内侧熔融浸渍;所述的浸渍腔体605为不锈钢材质中空的腔体管,其管壁上固定测温传感器603,管内侧夹持电热管604;所述的挤压轮对606由两个辊轮和伺服电机组成,固定在浸渍腔体605的下侧;所述的两个辊轮分别被伺服电机驱动旋转且转向相反,转动线速度与压辊单元5中的铺叠压辊运动线速度相同,在液压单元4中液压油缸的100N压力推动下将浸润后的热塑性碳纤维复合材料预浸料均匀挤出形成预浸带,预浸带宽度为10mm;The prepreg tape preparation unit 6 is composed of a resin supply module 601, a carbon fiber supply module 602, a temperature sensor 603, an electric heating tube 604, an impregnation cavity 605 and an extrusion wheel pair 606; the resin supply module 601 is composed of resin The DC motor is composed of a fixed frame, a DC motor and a gear pair with clearance meshing. Under the control of the controller 1, the DC motor drives the gear pair to rotate, squeeze out the resin wire and transport it to the electric heating tube 604; the carbon fiber supply module 602 is composed of a carbon fiber frame and The carbon fiber tow suspended on the carbon fiber frame is pulled by the traction force formed by the rotation and extrusion of the extrusion wheel pair 606 and enters the electric heating tube 604 through the spreading wheel pair. The carbon fiber tow is spread by the spreading wheel pair. Flat; the temperature sensor 603 is a contact temperature sensor, used to measure the temperature outside the electric heating tube 604, and transmit the obtained temperature data to the controller 1; the electric heating tube 604 is a tubular shape wound with an electric heating coil The heater heats the thermoplastic resin to a molten state under the control of the controller 1, and the carbon fiber tow and the thermoplastic resin are melted and impregnated inside the electric heating tube 604; the impregnation cavity 605 is a hollow cavity tube made of stainless steel, and its tube The temperature sensor 603 is fixed on the wall, and the electric heating tube 604 is clamped on the inside of the tube; the extrusion wheel pair 606 is composed of two rollers and a servo motor, and is fixed on the lower side of the impregnation cavity 605; the two rollers The wheels are driven to rotate by servo motors and rotate in opposite directions. The linear speed of rotation is the same as the linear speed of the layup roller movement in the pressure roller unit 5. The wetted thermoplastic carbon fiber composite material is pushed by the 100N pressure of the hydraulic cylinder in the hydraulic unit 4. The prepreg material is evenly extruded to form a prepreg tape with a width of 10mm;

所述的预浸带导向槽7为开一条凹槽的长方体铝块,凹槽宽度为预浸带制备单元6挤出的预浸带宽度,凹槽深度为1mm,固定在压辊单元5的支撑杆上,保证在铺叠时预浸带制备单元6挤出的预浸带与凹槽底部平行,用于将预浸带输送到压辊的下面;The prepreg guide groove 7 is a rectangular aluminum block with a groove. The groove width is the width of the prepreg tape extruded by the prepreg preparation unit 6. The groove depth is 1mm and is fixed on the pressure roller unit 5. On the support rod, ensure that the prepreg tape extruded by the prepreg tape preparation unit 6 is parallel to the bottom of the groove during layup, and is used to transport the prepreg tape to the underside of the pressure roller;

所述的预浸带裁剪单元8由舵机和刀片组成,固定在预浸带导向槽7的顶部,用于对预浸带进行剪切。The prepreg tape cutting unit 8 is composed of a steering gear and a blade, is fixed on the top of the prepreg tape guide groove 7, and is used to cut the prepreg tape.

最后应说明的是:以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; 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 it can still be used Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims (2)

Translated fromChinese
1.一种热塑性碳纤维复合材料激光3D打印方法,其特征在于该方法是采用齿轮副间隙啮合滚动方式将条状热塑性树脂材料输送到电热管(604)内部,连续碳纤维丝束经过展丝轮对被输送到电热管(604)内部,热塑性树脂材料在电热管(604)内部被加热融化成熔融态,熔融的热塑性树脂浸润连续碳纤维丝束形成热塑性碳纤维复合材料预浸料;热塑性碳纤维复合材料预浸料在挤压轮对(606)的挤压下均匀挤出并冷却形成薄片状预浸带,该预浸带通过预浸带导向槽(7)被传送到铺叠压辊下;采用光场分布均匀的激光束辐照加热预浸带铺层与基底层的接触位置,使预浸带铺层下表面和基底层上表面的树脂融化,在铺叠压辊的辊压下冷却成型。1. A method for laser 3D printing of thermoplastic carbon fiber composite materials, which is characterized in that the method uses a gear pair gap meshing and rolling method to transport the strip-shaped thermoplastic resin material into the interior of the electric heating tube (604), and the continuous carbon fiber tow passes through the spreading wheel pair is transported to the inside of the electric heating tube (604), the thermoplastic resin material is heated and melted into a molten state inside the electric heating tube (604), and the molten thermoplastic resin infiltrates the continuous carbon fiber tow to form a thermoplastic carbon fiber composite prepreg; the thermoplastic carbon fiber composite prepreg The impregnation material is evenly extruded and cooled under the squeeze of the extrusion wheel pair (606) to form a sheet-like prepreg tape. The prepreg tape is transported to the layup press roller through the prepreg tape guide groove (7); using light The uniformly distributed laser beam irradiates and heats the contact position between the prepreg tape layer and the base layer, causing the resin on the lower surface of the prepreg tape layer and the upper surface of the base layer to melt and then cool and form under the pressure of the lamination roller.2.如权利要求1所述的一种热塑性碳纤维复合材料激光3D打印头,其特征在于该打印头包括控制器(1)、激光加热头(2)、红外测温模块(3)、液压单元(4)、压辊单元(5)、预浸带制备单元(6)、预浸带导向槽(7)和预浸带裁剪单元(8);2. A thermoplastic carbon fiber composite laser 3D printing head according to claim 1, characterized in that the printing head includes a controller (1), a laser heating head (2), an infrared temperature measurement module (3), and a hydraulic unit. (4), pressure roller unit (5), prepreg tape preparation unit (6), prepreg tape guide groove (7) and prepreg tape cutting unit (8);所述的控制器(1)为单片机控制器;The controller (1) is a single-chip microcomputer controller;所述的激光加热头(2)由光纤传输的连续激光器和光束整形器组成,激光加热头2的输出光纤头与光束整形器一起固定在压辊单元(5)的压辊架上,连续激光器输出的光束经过光束整形器后输出光场分布均匀的方形激光光斑;所述的光纤传输的连续激光器为红外波段的光纤传输半导体激光器或光纤激光器;The laser heating head (2) is composed of a fiber-transmitted continuous laser and a beam shaper. The output fiber head of the laser heating head 2 and the beam shaper are fixed on the pressure roller frame of the pressure roller unit (5). The continuous laser The output beam passes through the beam shaper and outputs a square laser spot with uniform light field distribution; the fiber-transmitted continuous laser is a fiber-transmitted semiconductor laser or fiber laser in the infrared band;所述的红外测温模块(3)为红外测温仪,固定在压辊单元(5)的压辊架上;The infrared temperature measurement module (3) is an infrared thermometer, which is fixed on the pressure roller frame of the pressure roller unit (5);所述的液压单元(4)为两路输出的液压执行模块,每一路输出均由调压阀和液压油缸组成;在控制器(1)的控制下,其中一路输出通过该路的液压油缸实现压辊单元(5)的加载和卸载,另外一路输出通过该路的液压油缸实现对挤压轮对(606)内挤出压力的调节;The hydraulic unit (4) is a hydraulic execution module with two outputs. Each output is composed of a pressure regulating valve and a hydraulic cylinder; under the control of the controller (1), one of the outputs is realized through the hydraulic cylinder of that path. The loading and unloading of the pressure roller unit (5), and the output of another channel realizes the adjustment of the extrusion pressure in the extrusion wheel pair (606) through the hydraulic cylinder of this channel;所述的压辊单元(5)由压辊架、铺叠压辊和支撑杆组成,通过支撑杆固定激光加热头(2)、红外测温模块(3)、预浸带导向槽(7)和预浸带裁剪单元(8);The pressure roller unit (5) is composed of a pressure roller frame, a lamination pressure roller and a support rod. The laser heating head (2), infrared temperature measurement module (3), and prepreg tape guide groove (7) are fixed through the support rod. and prepreg tape cutting unit (8);所述的预浸带制备单元(6)由树脂供应模块(601)、碳纤维供应模块(602)、测温传感器(603)、电热管(604)、浸渍腔体(605)和挤压轮对(606)组成;所述的树脂供应模块(601)由树脂固定架、直流电机和间隙啮合的齿轮副组成;所述的碳纤维供应模块(602)由碳纤维架和展丝轮对组成,悬挂在碳纤维架上的碳纤维丝束在挤压轮对(606)旋转挤出形成的牵引力牵拉下经过展丝轮对进入电热管(604)中;所述的测温传感器(603)为接触式温度传感器;所述的电热管(604)为电加热线圈卷绕的管状加热器;所述的浸渍腔体(605)为不锈钢材质中空的腔体管,其管壁上固定测温传感器(603),管内侧夹持电热管(604);所述的挤压轮对(606)由两个辊轮和伺服电机组成,固定在浸渍腔体(605)的下侧;所述的两个辊轮分别被伺服电机驱动旋转且转向相反,转动线速度与压辊单元(5)中的铺叠压辊运动线速度相同;The prepreg tape preparation unit (6) consists of a resin supply module (601), a carbon fiber supply module (602), a temperature sensor (603), an electric heating tube (604), an impregnation chamber (605) and an extrusion wheel pair. (606); the resin supply module (601) is composed of a resin fixed frame, a DC motor and a gap meshing gear pair; the carbon fiber supply module (602) is composed of a carbon fiber frame and a spreading wheel pair, suspended on The carbon fiber tows on the carbon fiber frame are pulled by the traction force formed by the rotation and extrusion of the extrusion wheel pair (606) and enter the electric heating tube (604) through the spreading wheel pair; the temperature sensor (603) is a contact temperature sensor. Sensor; the electric heating tube (604) is a tubular heater wound by an electric heating coil; the impregnation chamber (605) is a hollow cavity tube made of stainless steel, with a temperature sensor (603) fixed on the tube wall. , the electric heating tube (604) is clamped inside the tube; the extrusion wheel pair (606) is composed of two rollers and a servo motor, and is fixed on the lower side of the impregnation cavity (605); the two rollers They are driven to rotate by servo motors and have opposite directions, and the linear speed of rotation is the same as the linear speed of the laminating pressure roller movement in the pressure roller unit (5);所述的预浸带导向槽(7)为开一条凹槽的长方体铝块,凹槽宽度为预浸带制备单元(6)挤出的预浸带宽度,凹槽深度不大于1mm,固定在压辊单元(5)的支撑杆上,保证在铺叠时预浸带制备单元(6)挤出的预浸带与凹槽底部平行;The prepreg guide groove (7) is a rectangular aluminum block with a groove. The groove width is the width of the prepreg tape extruded by the prepreg preparation unit (6). The groove depth is not more than 1mm and is fixed on On the support rod of the pressure roller unit (5), ensure that the prepreg tape extruded by the prepreg tape preparation unit (6) is parallel to the bottom of the groove during layup;所述的预浸带裁剪单元(8)由舵机和刀片组成,固定在预浸带导向槽(7)的顶部。The prepreg tape cutting unit (8) is composed of a steering gear and a blade and is fixed on the top of the prepreg tape guide groove (7).
CN202311589593.5A2023-11-272023-11-27Thermoplastic carbon fiber composite material laser 3D printing method and printing headPendingCN117359931A (en)

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US20210347115A1 (en)*2018-10-252021-11-11Make Composites, Inc.Systems and methods of printing with fiber-reinforced materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
CN102555230A (en)*2010-09-242012-07-11通用电气公司Resin delivery, application and infusion system and integrated layup system and method of use
CN109070391A (en)*2016-12-222018-12-21阿科玛法国公司Method for producing fibre material preimpregnated with thermoplastic polymer in fluidized bed
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