Device for measuring curing deformation of surface of composite material workpiece

Abstract

The utility model relates to a surface curing deformation measuring device for a composite material workpiece. The surface curing deformation measuring device comprises a storage rack, an X-axis linear module, a Y-axis linear module, a laser range finder, a supporting rod, a movable clamping jaw and a control processor, the top of the shelf is provided with a crossbeam; the X-axis linear module is fixed on the storage rack; the Y-axis linear module is fixed on a sliding block of the X-axis linear module; the laser range finder is fixed on a sliding block of the Y-axis linear module; the supporting rod is fixed to the bottom of the beam. The movable clamping jaw is fixed to the bottom of the supporting rod. The control processor is electrically connected with the X-axis linear module, the Y-axis linear module and the laser range finder. The curing deformation measuring device is of a double-axis motion structure, the X-axis linear module and the Y-axis linear module are used for controlling the laser range finder to move, the distance between the laser range finder and the composite material workpiece is measured through the laser range finder, and the curing deformation measuring device is simple in structure, low in cost, high in measuring precision and capable of being widely applied to curing deformation measurement of the composite material workpiece.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material detection, in particular to a composite material product surface curing deformation measuring device. Background Art

[0002] Composite materials are a solid product composed of a matrix and a reinforcement. They are widely used in aviation structures, especially in fuselage structures, due to their high specific strength, high modulus, light weight, and flexible design. They are gradually becoming the main material for the overall and large structures of advanced civil aircraft. The manufacture of fiber-reinforced resin-based composite parts is a molding process under high temperature and high pressure. During the curing and molding process of composite parts, residual stress will appear inside the parts due to factors such as volume shrinkage caused by resin chemical reactions, mismatch of thermal expansion coefficients of fibers and resins, and interaction between composite components and molds. After the components are demolded, the residual stress is released during curing, resulting in curing deformation. Especially for large composite overall structures, the deformation after curing will lead to the use and assembly of the parts, reducing their lifespan.

[0003] It has become inevitable to improve the manufacturing level of composite materials by predicting the curing deformation of components in advance through theoretical models or numerical simulations and proposing control plans. To provide accurate curing deformation parameters of composite parts for the model, it is necessary to measure the surface of the parts through measuring devices. At present, vernier calipers or three-dimensional coordinate measuring machines are mostly used to measure the curing deformation of composite parts. The measurement accuracy of vernier calipers is low and cannot provide accurate curing deformation parameters. Although the measurement accuracy of three-dimensional coordinate measuring machines is high, they control the movement of the probe head through a three-axis structure, and the probe head contacts the composite parts to achieve measurement. The structure is complex, professional, and the cost is quite expensive, so it is not suitable for ordinary experimental measurements. Utility Model Content

[0004] The main purpose of the utility model is to provide a device for measuring the surface curing deformation of a composite material product, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A composite material part surface curing deformation measuring device, comprising:

[0007] A storage rack with a crossbeam on the top;

[0008] An X-axis linear module is fixed on the storage rack;

[0009] A Y-axis linear module, fixed on the slider of the X-axis linear module;

[0010] A laser rangefinder, fixed on the slider of the Y-axis linear module;

[0011] A support rod fixed to the bottom of the crossbeam;

[0012] A movable clamping claw is fixed at the bottom of the support rod and is used to grasp and clamp the composite material workpiece;

[0013] The control processor is electrically connected to the X-axis linear module, the Y-axis linear module and the laser rangefinder respectively.

[0014] Preferably, the storage rack is a rectangular frame structure, including four supporting leg columns and a crossbeam connecting the tops of the four supporting leg columns.

[0015] Preferably, the X-axis linear module and the Y-axis linear module both include a motor, a guide rail and a slider, and the slider is driven by the motor to move on the guide rail.

[0016] Preferably, the support rod is a double top screw fixing clamp.

[0017] The utility model provides a device for measuring the surface curing deformation of a composite material workpiece, which has the following beneficial effects:

[0018] The utility model is a dual-axis motion structure, which controls the movement of a laser rangefinder through an X-axis linear module and a Y-axis linear module, and measures the distance between the laser rangefinder and a composite material workpiece. The utility model has a simple structure, low cost, and high measurement accuracy, and can meet the measurement requirements of the curing deformation of composite material workpieces. It can be widely used in the measurement of the curing deformation of composite material workpieces, and provides guidance for the input of simulation model parameters and the adjustment of manufacturing processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the measuring device of the utility model;

[0020] Figure 2 It is a front structural schematic diagram of the measuring device of the utility model.

[0021] In the figure: 1. storage rack; 11. crossbeam; 2. X-axis linear module; 3. Y-axis linear module; 4. laser rangefinder; 5. support rod; 6. movable clamp; 100. skin; 200. long stringer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings of the utility model.

[0023] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Reference Figure 1 , Figure 2 The utility model provides a composite material workpiece surface curing deformation measuring device, comprising a rack 1, an X-axis linear module 2, a Y-axis linear module 3, a laser rangefinder 4, a support rod 5, a movable clamp 6 and a control processor;

[0027] The top of the rack 1 is provided with a crossbeam 11. Specifically, the rack 1 is a rectangular frame structure, including four leg columns and a crossbeam 11 connecting the tops of the four leg columns;

[0028] The X-axis linear module 2 is fixed on the storage rack 1; the Y-axis linear module 3 is fixed on the slider of the X-axis linear module 2; the laser rangefinder 4 is fixed on the slider of the Y-axis linear module 3; the X-axis linear module 2 and the Y-axis linear module 3 both include a motor, a guide rail and a slider, and the slider is driven by the motor to move on the guide rail. The X-axis linear module 2 is laterally fixed between two supporting legs, and the Y-axis linear module 3 is vertically fixed on the slider of the X-axis linear module 2. With the cooperation of the X-axis linear module 2 and the Y-axis linear module 3, the laser rangefinder 4 can move left and right and up and down;

[0029] The support rod 5 is fixed at the bottom of the crossbeam 11; the movable clamp 6 is fixed at the bottom of the support rod 5 and is used to clamp the composite material product; the support rod 5 is a double-top screw fixing clamp, which can be easily replaced at the fixed position on the crossbeam 11, and the movable clamp 6 is a manual, pneumatic or electric clamp. After the composite material product is clamped, it is located in front of the laser rangefinder 4, and when clamping the composite material product, the middle part of the upper end of the composite material product is clamped as much as possible;

[0030] The control processor is electrically connected to the X-axis linear module 2, the Y-axis linear module 3 and the laser rangefinder 4 respectively, and is used to control the X-axis linear module 2, the Y-axis linear module 3 to move the laser rangefinder 4 to the corresponding point, and measure the distance between the laser rangefinder 4 and the composite material workpiece at the point through the laser rangefinder 4.

[0031] The utility model also provides a method for measuring the surface curing deformation of a composite material product, using the above-mentioned measuring device, comprising the following steps:

[0032] S1: placing a composite material product in a storage rack 1, and clamping and fixing the composite material product by means of a movable clamp 6, so that the composite material product is in a suspended free state;

[0033] S2: Determine the measurement origin of the composite material part, and move the laser rangefinder 4 to the measurement origin through the X-axis linear module 2 and the Y-axis linear module 3;

[0034] S3: Start measuring, move the laser rangefinder 4 to several different points through the X-axis linear module 2 and the Y-axis linear module 3, and measure the distance between the laser rangefinder 4 and the composite material workpiece at each point through the laser rangefinder 4 to complete the scanning of the surface of the composite material workpiece;

[0035] S4: At each point, the positions of the slides of the X-axis linear module 2 and the Y-axis linear module 3 are respectively used as the X-axis coordinate value and the Y-axis coordinate value, and the distance value measured by the laser rangefinder 4 is used as the Z-axis coordinate value, so as to obtain the three-dimensional coordinates of different points on the measured surface, and the control processor establishes a model through the obtained three-dimensional coordinates, and obtains the surface curing deformation parameters of the composite material part according to the model.

[0036] The following is a further description with reference to specific embodiments.

[0037] Embodiment 1

[0038] In this embodiment, the composite material part is a T-shaped stiffened wall panel, which is composed of a skin 100 and a long stringer 200. The size of the skin 100 is 600 mm×352 mm. In this embodiment, the surface curing deformation parameters of the skin 100 need to be measured.

[0039] S1: Place the T-shaped reinforced wall panel in the storage rack 1, and clamp and fix the T-shaped reinforced wall panel by the movable clamp 6, so that the T-shaped reinforced wall panel is in a suspended free state, the purpose of which is to eliminate the influence of weight on the workpiece, and then accurately measure the curing deformation of the workpiece;

[0040] S2: Determine the measurement origin of the T-shaped reinforced wall panel, and move the laser rangefinder 4 to the measurement origin through the X-axis linear module 2 and the Y-axis linear module 3;

[0041] Specifically, the lower right corner endpoint of the T-shaped stiffened wall panel skin 100 is used as the measurement origin. The laser rangefinder 4 is turned on before measurement to ensure that the laser can be emitted from the laser emitting area and can be received by the laser receiving area after being reflected back on the surface of the stiffened wall panel skin 100. The working mode of the laser rangefinder 4, that is, the frequency of emitting laser, can be adjusted as needed. In this embodiment, the frequency is set to 10ms.

[0042] S3: Start measuring, move the laser rangefinder 4 to several different points through the X-axis linear module 2 and the Y-axis linear module 3, and measure the distance between the laser rangefinder 4 and the T-shaped stiffened wall panel skin 100 at each point through the laser rangefinder 4, and complete the scanning of the surface of the T-shaped stiffened wall panel skin 100;

[0043] During measurement, the X-axis linear module 2 and the Y-axis linear module 3 are programmed so that the laser rangefinder 4 first moves 600 mm along the direction of the T-shaped reinforced wall panel long girder 200, and then moves 5 mm upward along the direction perpendicular to the long girder 200, and repeats this cycle to form an S-shaped scan. In this embodiment, the moving speed of the X-axis linear module 2 is 100 mm / s, and the moving speed of the Y-axis linear module 3 is 5 mm / s.

[0044] S4: At each point, the positions of the slides of the X-axis linear module 2 and the Y-axis linear module 3 are respectively used as the X-axis coordinate value and the Y-axis coordinate value, and the distance value measured by the laser rangefinder 4 is used as the Z-axis coordinate value, so as to obtain the three-dimensional coordinates of different points on the measured surface, and the control processor establishes a model through the obtained three-dimensional coordinates, and obtains the surface curing deformation parameters of the T-shaped stiffened wall panel skin 100 according to the model.

[0045] The X-axis coordinate value and the Y-axis coordinate value are calculated according to the moving speed of the X-axis linear module 2, the moving speed of the Y-axis linear module 3 and the frequency of the laser emitting by the laser rangefinder 4. The distance value measured by the laser rangefinder 4 is the Z-axis coordinate value. The control processor is a computer with the software Catia. The measured three-dimensional coordinates are imported into the software Catia for reverse modeling, and the surface curing deformation parameters of the T-shaped stiffened wall panel skin 100 are obtained according to the model.

[0046] Embodiment 2

[0047] In this embodiment, the composite material part is an I-shaped reinforced wall panel, and the size of the skin 100 is the same as 600mm×352mm, and the measurement is performed according to the method of the first embodiment;

[0048] Comparative Example 1

[0049] The composite material product of this embodiment is the T-shaped reinforced wall panel of the first embodiment, and is measured using a vernier caliper.

[0050] Comparative Example 2

[0051] The composite material product of this embodiment is the I-shaped reinforced wall panel of the second embodiment, and is measured using a vernier caliper.

[0052] The skin deformation measured according to the above-mentioned embodiment 1, embodiment 2, comparative example 1 and comparative example 2 is shown in the following table:

[0053] Reinforced wall panel type Skin deformation / mm Example 1 (T-shaped reinforced wall panel) 1.453 Example 2 (I-shaped reinforced wall panel) 1.702 Comparative Example 1 (T-type reinforced wall panel) 1.3 Comparative Example 2 (I-shaped reinforced wall panel) 1.6

[0054] It can be seen from the above table that the skin deformation measured by this measurement method is more accurate and has higher precision, with an accuracy of up to 0.001mm.

[0055] The utility model is a dual-axis motion structure, which controls the movement of a laser rangefinder 4 through an X-axis linear module 2 and a Y-axis linear module 3, and measures the distance between the laser rangefinder 4 and a composite material workpiece. The utility model has a simple structure, low cost, and high measurement accuracy, and can meet the measurement requirements of the curing deformation of composite material workpieces. It can be widely used in the measurement of the curing deformation of composite material workpieces, and provides guidance for the input of simulation model parameters and the adjustment of manufacturing processes.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite material workpiece surface curing deformation measurement device, characterized in that: include A storage rack with a crossbeam on the top; An X-axis linear module is fixed on the storage rack; A Y-axis linear module, fixed on the slider of the X-axis linear module; A laser rangefinder, fixed on the slider of the Y-axis linear module; A support rod fixed to the bottom of the crossbeam; A movable clamping claw is fixed at the bottom of the support rod and is used to grasp and clamp the composite material workpiece; The control processor is electrically connected to the X-axis linear module, the Y-axis linear module and the laser rangefinder respectively.

2. The device for measuring surface curing deformation of composite material parts according to claim 1, characterized in that: The storage rack is a rectangular frame structure, including four supporting leg columns and a crossbeam connecting the tops of the four supporting leg columns.

3. The device for measuring surface curing deformation of composite material parts according to claim 1, characterized in that: The X-axis linear module and the Y-axis linear module both include a motor, a guide rail and a slider, and the slider is driven by the motor to move on the guide rail.

4. The device for measuring surface curing deformation of composite material parts according to claim 1, characterized in that: The support rod is a double top screw fixing clamp.

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