CN108340595A - A kind of multifunctional carbon fiber lay system for compacting - Google Patents

Abstract

Multifunctional carbon fiber of the present invention lays system for compacting, rotating mechanism, godet and compacting heating roller.The translation mechanism drives ball-screw-transmission by servo motor, carries out movement in the front-back direction；Meanwhile passive movement in the front-back direction is carried out by the effect of spring；Rotating mechanism is directly driven by a motor the rotation of realization roller bracket ± 45 °；Godet and compacting heating roller are installed on roller bracket, are located at immediately ahead of mechanism.Pre-soaking fiber can make fiber be laid on mandrel surface by fiber conduction device through reaching mandrel surface, the rotation of godet below godet and above compacting heating roller, and fiber is bonded with core model and is heated to pre-soaking fiber by compacting heating roller completely.Integrated functionality of the present invention occupies little space；And auxiliary is measured by position and completes compaction force measurement and control, realize accurately controlling for compaction force；There is seal wire and temperature control function simultaneously.

Description

A Multifunctional Carbon Fiber Laying and Compacting Mechanism

technical field

The invention relates to the field of composite material molding, specifically, a two-degree-of-freedom carbon fiber laying and compacting mechanism with guide wires, temperature control, and compaction force control.

Background technique

Carbon fiber composite materials have high specific strength, high specific modulus, excellent fatigue resistance, stealth performance and corrosion resistance, etc., and can meet the stringent requirements for material performance in cutting-edge technology fields. Carbon fiber automatic wire laying forming technology is an important method for composite material forming.

Carbon fiber automatic filament laying technology can be used to manufacture structural parts with concave surfaces, which is realized by compacting carbon fibers on the surface of the mandrel through a compacting mechanism. The compaction mechanism in the existing wire laying machine is simply equipped with a cylinder, a hydraulic cylinder or a linear motor to directly drive the pressure roller to compact and shape the carbon fiber. The control of the compaction force is not accurate enough, and the temperature control and wire guide functions are controlled The realization of other modules increases the complexity of the system structure.

Contents of the invention

The present invention aims at the problem that the compaction mechanism in the existing silk laying equipment does not control the compaction force accurately enough, and the compaction mechanism has a single function, and proposes a multifunctional carbon fiber laying with wire guide, temperature control, and compaction force control compaction mechanism.

The multifunctional carbon fiber laying and compacting mechanism of the present invention includes a bottom plate, a translation mechanism, a rotation mechanism and a compaction mechanism.

The translation mechanism has a frame structure composed of front and rear link support plates and a bottom link floor, and the frame structure is installed on the bottom plate through guide rails. A ball screw is installed between the front and rear link support plates; the ball screw is driven to rotate by the driving mechanism; the nut on the ball screw is fixed with the support plate. A spring is arranged between the support plate and the front and rear link support plates. The above-mentioned front link support plate has a rotating mechanism mounting table extending forward.

The rotating mechanism is installed on the rotating mechanism installation platform, and is a rotating shaft driven by a motor, and a compacting mechanism is installed at the end of the rotating shaft.

The compaction mechanism includes a compaction heating roller, a godet roller and a roller frame; wherein, the roller frame fixes the end of the rotating shaft; the compaction heating roller and the godet roller are installed on the roller frame.

Therefore, the rotation of the roller frame is controlled by the rotating mechanism, so that the fibers are evenly spread along the axial direction of the mandrel and spread on the mandrel; the driving mechanism drives the compacting mechanism to move back and forth, so that the compacting heating roller can completely attach the fiber to the mandrel, And heat the prepreg fiber. And after the compaction heating roller comes into contact with the surface of the mandrel, pressure is generated to cause the spring to deform, the deformation of the spring is measured by the displacement sensor to obtain the compaction force of the compaction heating roller, and the negative feedback control method of the PID unit is used to control the rotation of the ball screw , so that the compression amount of the spring can be adjusted so that the compaction heating roller outputs a constant compaction force.

The advantages of the present invention are:

1. The multi-functional carbon fiber laying and compacting mechanism of the present invention has a small footprint for integrated functions;

2. The multifunctional carbon fiber laying and compacting mechanism of the present invention assists in the measurement and control of the compaction force through position measurement, and realizes precise control of the compaction force;

3. The multifunctional carbon fiber laying and compacting mechanism of the present invention has functions of wire guide and temperature control.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the multifunctional carbon fiber laying and compacting mechanism of the present invention;

Fig. 2 is a structural schematic diagram of the translation mechanism in the multifunctional carbon fiber laying and compacting mechanism of the present invention;

Fig. 3 is a structural schematic diagram of the rotating mechanism and the compacting mechanism in the multifunctional carbon fiber laying and compacting mechanism of the present invention;

Fig. 4 is a structural sectional view of the heating and compacting roller in the multifunctional carbon fiber laying and compacting mechanism of the present invention;

Fig. 5 is a schematic diagram of the arc-shaped outer wall of the godet roller in the multifunctional carbon fiber laying and compacting mechanism of the present invention.

In the picture:

1- Base plate 2- Translation mechanism 3- Rotation mechanism

4-Compacting mechanism 5-Drive mechanism 201-Ball screw

202-spring 203-link bottom plate 204-support plate

205-link support plate 206-support shaft 207-guide rail

208-Rail Slider 209-Rotation Mechanism Mounting Platform 301-Stepper Motor

302-coupling rotation mechanism drive 303-rotating shaft 401-compaction heating roller

402- godet roller 403-roller stand 401a-roller shaft

401b-retaining ring 401c-bearing 401d-outer ring of compaction heating roller

401e-Even heat liner 401f-Spiral heater 401g-Insulation liner

401h-temperature sensor 501-servo motor 502-reducer

503-translation mechanism drive coupling

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

The multifunctional carbon fiber laying and compacting mechanism of the present invention, as shown in FIG. 1 , includes a bottom plate 1 , a translation mechanism 2 , a rotation mechanism 3 and a compaction mechanism 4 .

The translation mechanism 2 is installed on the base plate 1, including a ball screw 201, a spring 202, a link base plate 203, a support plate 204, a link support plate 205, a support shaft 206, a guide rail 207 and a guide rail slider 208, as shown in FIG. 2 . Wherein, the ball screw 201 is arranged parallel to the bottom plate 1 , both ends are supported by the screw support, and are mounted on the bottom plate 101 through the screw support. The ball screw 201 has a threaded nut, and a support plate 204 is fixed on the nut; at the same time, the ball screw 201 is also covered with two link support plates 205, and the two link support plates 205 are respectively located at the front and rear positions of the nut. The bottom ends of the two link support plates 205 are fixed to the horizontally arranged link base plate 203 by screws;

The two link support plates 205 are connected by a support shaft 206; the two ends of the support shaft 206 are respectively fixed to the two link support plates 204; the support shaft 206 is located directly above the ball screw 201, and its axis is parallel to the axis of the ball screw 201 in the same vertical plane and pass through the through hole on the support plate 204 .

There are two springs 202 , which are sleeved on the support shaft 206 . One of the springs 202 is located between the front link support plate 205 and the support plate 204 ; the other spring 202 is located between the rear link support plate 205 and the support plate 204 .

The guide rail 207 is arranged along the front and rear direction, and is fixedly installed on the base plate 1 . The miniature guide rail slider 2 is installed on the guide rail 207, so that the guide rail slider 208 can slide along the guide rail. The guide rail slider 208 is fixedly connected with the link base plate 1 .

The translation mechanism 2 with the above structure is driven by the driving mechanism 5 to realize the forward and backward movement of the link support plate 205 . The driving mechanism 5 includes a servo motor 501 , a speed reducer 502 and a drive coupling 503 for the translation mechanism. Wherein, the servo motor 501 is fixed on the motor bracket by screws, and is supported on the bottom plate 1 by the motor bracket. The output shaft of the servo motor 501 is connected to the speed reducer 502 . The output shaft of the speed reducer 502 is coaxially connected with the end of the ball screw 201 through a translation mechanism driving coupling 503 . Thus, the ball screw 201 can be driven to rotate by the servo motor 501, so that the nut drives the support plate 204 to move back and forth along the axial direction of the ball screw 201, compresses the spring 202, and guides through the cooperation between the guide rail slider 208 and the guide rail 207, Finally, the two link support plates 205 and the link base plate 1 are driven to move forward and backward as a whole, so as to realize the forward and backward movement of the link support plate 205 .

The rotating mechanism 3 includes a stepping motor 301 , a rotating mechanism driving coupling 302 and a rotating shaft 303 , as shown in FIG. 3 . Wherein, the stepper motor 301 is installed on the motor bracket through screws, and is supported on the rotating mechanism installation platform 209 through the motor bracket. The stepping motor 301 is coaxially connected with the rotating shaft 303 through a rotating mechanism driving a shaft coupling 302 . The above-mentioned rotating mechanism 3 is used to drive the compacting mechanism 4 to rotate around the axis of the rotating shaft 303 .

The compaction mechanism 4 includes a compaction heating roller 401 , a godet roller 402 and a roller frame 403 , as shown in FIG. 3 . Wherein, the roller frame 403 is a U-shaped frame, and the center position of the bottom is fixedly installed on the end of the rotating shaft 303 . The compacting heating roller 401 and the godet roller 402 are installed in the roller frame 403 one after the other, and their axes are parallel to each other and to the axis of the rotating shaft 303 . The above-mentioned compaction heating roller 401 includes a roller shaft 401a, an elastic retaining ring 401b, a bearing 401c, a compaction heating roller outer ring 401d, a uniform heat bushing 401e, a spiral heater 401f, a heat insulating bushing 401g and a temperature sensor 401h, as shown in the figure 4. The inside of the roller shaft 401a is hollow for wiring, and the heat insulating bush 401g is placed on the roller shaft 401a to prevent the roller shaft 401a from overheating, causing damage to the wires in the roller shaft 401a and causing danger. The heat insulating bush 401g is covered with a spiral heater 401f, and the spiral heater 401f is fixed on the roller shaft 401a by screws. The spiral heater 401f is covered with a uniform heat bushing 401e to ensure that the spiral heater 401f is heated evenly. The outer ring of the compacting heating roller 401d is sheathed on the outside of the even heat bushing 401e, and the two ends of the outer ring of the compacting heating roller 401d are connected to the roller shaft 401a through the bearing 401c, and the axial positioning of the bearing 401c is realized through the elastic retaining ring 401b. The temperature sensor 401h is installed on the roller stand 403, and is used for real-time measurement of the heating temperature of the compaction heating roller 401. The outer wall of the above-mentioned godet roller is designed as an arc surface, which can realize the function of fiber convergence, as shown in FIG. 5 .

Through the multi-functional carbon fiber laying and compacting mechanism of the present invention, when the fiber reaches the godet roller 402 through the fiber conduction device, the arc surface of the godet roller 402 ensures that the fiber does not deviate in the middle of the roller and realizes fiber convergence. Subsequently, the rotation mechanism 3 controls the ±45° internal rotation of the roller frame 403, so that the fibers are evenly spread along the axial direction of the mandrel and spread on the mandrel, and then the driving mechanism 5 drives the compacting heating roller 401 to completely attach the fibers to the mandrel. and heat the prepreg fibers. When encountering a mandrel with a concave surface, the compacting heating roller 401 can still compact the fiber on the surface of the mandrel; and after the compacting heating roller 401 contacts the surface of the mandrel, pressure is generated to cause the deformation of the spring 202, and the displacement sensor Measure the deformation of the spring 202; since the spring 202 is a linear elastic body, the compressive force can be obtained from the deformation of the spring 202, controlled by the negative feedback control method of the PID unit, and the servo motor 501 is controlled to drive the ball screw 201 to rotate, so that the spring 202 can be adjusted The amount of compression makes the compaction heating roller 401 output a constant compaction force.

Claims (4)

1. A multifunctional carbon fiber laying and compacting mechanism is characterized in that: it comprises a base plate, a translation mechanism, a rotation mechanism and a compaction mechanism; The translation mechanism has a frame structure composed of front and rear link support plates and a bottom link floor, and the frame structure is installed on the base plate through guide rails; ball screws are installed between the front and rear link support plates; the ball screws are driven to rotate by the drive mechanism; The nut on the lead screw is fixed to the support plate; a spring is arranged between the support plate and the front and rear link support plates; the above-mentioned front link support plate has a rotating mechanism installation platform extending forward; The rotating mechanism is installed on the rotating mechanism installation platform, which is a rotating shaft driven by a motor, and a compacting mechanism is installed at the end of the rotating shaft; the rotating mechanism drives the compacting mechanism to rotate; the driving mechanism drives the compacting mechanism to move forward and backward; The compaction mechanism includes a compaction heating roller, a godet roller and a roller frame; wherein, the roller frame fixes the end of the rotating shaft; the compaction heating roller and the godet roller are installed on the roller frame. 2. A multi-functional carbon fiber laying and compacting mechanism as claimed in claim 1, characterized in that: the compaction heating roller comprises a roller shaft, a circlip, a bearing, an outer ring of the compaction heating roller, a uniform heat bushing, a spiral Heater, insulation bushing and temperature sensor; Among them, the heat-insulating bushing is set on the roller shaft, and the outer part of the heat-insulating bushing is covered with a spiral heater, and the spiral heater is fixed on the roller shaft through screws; There is an outer ring of the compaction heating roller, and the two ends of the outer ring of the compaction heating roller are connected to the roller shaft through bearings; the temperature sensor is installed on the roller frame to measure the heating temperature of the compaction heating roller in real time. 3. A multifunctional carbon fiber laying and compacting mechanism as claimed in claim 1, characterized in that: the outer wall of the godet roller is designed as an arc surface to realize the function of fiber convergence. 4. A kind of multifunctional carbon fiber laying and compacting mechanism as claimed in claim 1, is characterized in that: measure the deflection of spring by displacement sensor, obtain the compacting force of compacting heating roller, control by PID unit negative feedback control method, Control the servo motor to drive the ball screw to rotate, so that the compression amount of the spring can be adjusted, so that the compaction heating roller outputs a constant compaction force.