Device and method for detecting fit clearance between array composite pipe component and tool clamp

Abstract

The invention relates to a fit clearance detection device and method for an array composite pipe member and a work fixture, and relates to the field of machining, the fit clearance detection device comprises extension rods, a light source, a photoresistor, a main shaft connecting device and a control system, the extension rods comprise a first extension rod and a plurality of second extension rods, the plurality of second extension rods surround the periphery of the first extension rod, and the light source is arranged on the light source; the first extension rod is connected with a light source, each second extension rod is provided with a photoresistor, the head of each photoresistor faces the central light source, the extension length of each extension rod is adjustable, the extension rods are installed at the output end of the main shaft connecting device, and the light source, the photoresistors and the extension rods are all connected with the control system. According to the invention, the axial gap of the array composite tube is associated with the voltage of the photoresistor, the size of the axial gap in the clamping process and the machining process of the array composite tube is represented, and an adjustment basis is provided for the in-plane clamping device of the array composite tube to adjust the axial gap between the array composite tube and the surface of the clamp.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing and manufacturing technology, and in particular to a device and method for detecting the fitting clearance between an array composite tube component and a fixture. Background Art

[0002] Arrayed composite tubes are a typical honeycomb structure, consisting of a single cylindrical shell-shaped composite tube densely packed in two dimensions. The arrayed composite tube sandwich structure is a weak and difficult-to-process structure. Arrayed composite tubes have the following characteristics: Due to the excellent strength and stiffness characteristics of arrayed composite tubes, the arrayed composite tube structure can withstand a large amount of loads and stresses. Compared with traditional metal structures, arrayed composite tube structures have a lower density, which gives arrayed composite tubes a broad space for development in applications that require weight reduction, especially in aerospace, automotive, and sports equipment. Arrayed composite tubes have good durability and corrosion resistance, allowing composite tubes to be used for a long time in harsh environments. In addition, arrayed composite tubes have good vibration and energy absorption properties, which help reduce stress concentration and damage risks in the structure. While playing a supporting role, arrayed composite tubes can reduce the weight of components.

[0003] In the actual manufacturing process of array composite tubes, high requirements are placed on the surface accuracy and surface roughness of the array composite tubes. The array composite tubes need to be processed into the desired shape through mechanical processing. The processing and preparation process of array composite tubes usually includes material preparation (including fiber reinforcement materials and matrix materials), preparation of fiber reinforcement materials, material lamination, molding, curing, finishing, inspection and testing, etc. The axial gap of the array composite tube refers to the interval or gap between adjacent composite tubes in the axial direction. This gap is one of the important parameters that need to be considered and controlled during the design and manufacturing process. The size of the axial gap will affect the performance and function of the array composite tube structure. During the processing of the array composite tube, the axial gap is easy to change, and the size of the axial gap is not easy to measure, so that the clamping condition of the array composite tube cannot be fully reflected. In addition, the existence of the axial gap makes it difficult to effectively guarantee the processing size of the array composite tube. Therefore, there is an urgent need for a matching gap detection device for the array composite tube component and the fixture. Summary of the Invention

[0004] To address the problem of measuring axial clearance between arrayed composite tubes, the present invention provides a device and method for detecting the clearance between an arrayed composite tube component and a fixture. This device correlates the axial clearance of the arrayed composite tube with the voltage across a photoresistor, effectively characterizing the axial clearance during the clamping and machining processes. This provides a basis for adjusting the axial clearance between the arrayed composite tube and the fixture surface using the in-plane clamping device.

[0005] The technical means adopted in the present invention are as follows:

[0006] A device for detecting the fitting gap between an array of composite tube components and a tooling fixture includes a protruding rod, a light source, a photoresistor, a spindle connection device, and a control system. The protruding rod includes a first protruding rod and several second protruding rods, and the several second protruding rods surround the periphery of the first protruding rod. The first protruding rod is connected to the light source, and each second protruding rod is equipped with a photoresistor. The head of each photoresistor faces the central light source. The extension length of each protruding rod is adjustable. The protruding rod is installed at the output end of the spindle connection device, and the spindle connection device is installed at the output end of the spindle. The light source, photoresistor, and protruding rod are all connected to the control system.

[0007] Furthermore, the number of the second extending rods is at least 6, and they are evenly distributed around the middle light source at a preset angle.

[0008] Furthermore, the length of the protruding rod is adjustable, and the length should be at least 20-30 mm higher than the height of the detected array composite tube.

[0009] Furthermore, the photoresistor is a sealed photoresistor, and the dark resistance and light resistance of the selected photoresistor are both within a preset range, and the resistance variation range is matched with the collectible range of the control system voltage collection device.

[0010] The present invention also discloses a method for using a device for detecting the fit gap between an array composite tube component and a fixture, comprising the following steps:

[0011] Step 1: Install the device on the machine tool spindle according to the detection requirements. During installation, ensure that the detection device does not contact the workpiece to be inspected. The angle of the installation device must match the angle of the workpiece array to be processed. The center of the central array composite tube can accommodate the light source, and the array composite tubes connected to it and ring-connected around the central array composite tube can each accommodate the corresponding photoresistor. The interior of the array composite tube does not contact the light source, photoresistor, or the extended rod connected to it.

[0012] Step 2: Move the main shaft horizontally so that the detection device is placed above the array composite tube to be detected;

[0013] Step 3: Move the spindle in the Z-axis direction to allow the detection device to penetrate into the inner wall of the array composite tube. The lowering height must be such that the light source and the photoresistor are higher than the preset value of the fixture surface.

[0014] Step 4. Turn on the photoresistor switch and record the resistance value of the photoresistor under ambient light conditions;

[0015] Step 5: Turn on the light source switch and record the resistance value of the photoresistor. The control system calculates the axial gap of the array composite tube according to the change value of the photoresistor.

[0016] Furthermore, in step 1, the height of the machine tool spindle is higher than the sum of the height of the workpiece to be inspected and the height of the inspection device.

[0017] Furthermore, after step 5, the following steps are also included:

[0018] Step 6: Move the spindle in the Z-axis direction to move the detection device out of the array composite tube;

[0019] Step 7: Repeat steps 2-6 to detect the next array composite tube to be detected until all array composite tubes to be detected are detected.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This invention proposes a device and method for detecting the clearance between an array composite tube component and a fixture. By correlating the axial clearance of the array composite tube with the voltage of a photoresistor, the invention effectively characterizes the axial clearance during the clamping and machining process of the array composite tube. This provides a basis for adjusting the axial clearance between the array composite tube and the fixture surface using the in-plane clamping device. This method can be extended to honeycomb workpieces requiring axial clearance measurement, contributing to improving the overall machining level of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 Schematic diagram of array composite tube blank.

[0024] Figure 2 It is a front view of the device for detecting the fitting gap between the array composite tube component and the fixture of the present invention.

[0025] Figure 3 It is a top view of the device for detecting the fitting gap between an array composite tube component and a fixture of the present invention.

[0026] Figure 4 This is an assembly diagram of the device for detecting the fitting gap between an array of composite tube components and a fixture according to the present invention.

[0027] Figure 5 This is a schematic diagram of the installation position during the detection process of the device for detecting the fit gap between the array composite tube component and the fixture of the present invention.

[0028] In the figure: 1. Photoresistor, 2. Extending rod, 3. Fixed support plate, 4. Device connector, 5. Connecting rivet, 6. Fixing screw, 7. Photoresistor mounting plate, 8. Light source, 9. Internal expansion device, 10. Fitting clearance detection device for array composite tube component and fixture, 11. Array composite tube blank, 12. Base plate. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0033] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0035] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] like Figures 2 to 5 As shown, an embodiment of the present invention discloses a device for detecting the clearance between an arrayed composite tube component and a fixture, comprising a protruding rod 2, a light source 8, a photoresistor 1, a spindle connection device, and a control system. The protruding rods include a first protruding rod and a plurality of second protruding rods, the plurality of second protruding rods surrounding the first protruding rod. The first protruding rod is connected to a light source, and each second protruding rod is equipped with a photoresistor, with the head of each photoresistor facing the central light source. The extension length of each protruding rod is adjustable. The protruding rods are mounted at the output end of the spindle connection device, which is mounted at the output end of the spindle. The light source, photoresistor, and protruding rods are all connected to a control system. The present invention correlates the axial clearance of the arrayed composite tube with the voltage of the photoresistor, effectively characterizing the axial clearance of the arrayed composite tube during the clamping and machining process, and providing a basis for adjusting the axial clearance between the arrayed composite tube and the fixture surface using the in-plane clamping device of the arrayed composite tube.

[0037] As an optional embodiment, the extension rod is mounted at the output end of the spindle connection device, and the two are connected by a fixed support plate 3. The fixed support plate has threaded holes for connecting seven telescopic rods. The spindle connection device includes a device connector 4 and a connecting rivet 5. Specifically, the upper portion of the fixed support plate is connected to the device connector and, through the device connector, to the spindle. The device connector and the fixed support plate are connected by a set screw 6.

[0038] Furthermore, the number of the second extension rods is at least 6 and is evenly distributed around the central light source at a preset angle. In actual use, the lengths of the six photoresistor extension rods are adjustable, but the lengths of the six photoresistor extension rods should be kept consistent as much as possible.

[0039] Furthermore, the length of the extension rod is adjustable and should be at least 20-30 mm higher than the height of the array composite tube being tested. The end of the connecting rod is provided with a connecting mechanism that can be connected to a light source or a photoresistor, specifically comprising a light source connecting plate and a photoresistor mounting plate 7.

[0040] In this embodiment, the light source is an incandescent lamp or an energy-saving lamp or other device that can provide light. The light intensity of the light source should be moderate and meet the detection requirements.

[0041] A photoresistor is an electronic component that changes its resistance depending on light intensity. Stronger light intensity lowers the resistance of a photoresistor; weaker light intensity increases its resistance. A photoresistor's light flux response refers to its degree of change, or sensitivity, under a given light intensity. Light flux can be represented by a photoresistor's photoresistance characteristic curve, which describes the relationship between light intensity and resistance. Typically, a photoresistor's light sensitivity characteristic curve is nonlinear; that is, the relationship between light intensity and resistance is not a simple linear one. The light sensitivity characteristic curve can be used to understand the degree of resistance change of a photoresistor under different light intensity ranges. Light flux can be adjusted and selected based on the needs of the application, and the sensing technology for measuring light flux using photoresistors is currently quite mature.

[0042] like Figure 1 As shown, the specifications of existing composite tubes are basically the same, and the distance between adjacent composite tubes is very small. In addition, as long as the support plate equipped with the photoresistor can penetrate into the six adjacent support tubes centered on the support plate with the light source and does not contact the surrounding tube walls, a slight deviation will not make much difference to the detection effect of the device and is within a controllable preset range.

[0043] Furthermore, the photoresistor is a sealed photoresistor, and the dark resistance and light resistance of the selected photoresistor are both within a preset range, and the resistance variation range is matched with the collectible range of the control system voltage collection device.

[0044] The control system includes a power supply, a signal receiving device, a signal processing device, etc., which can provide power to the device and feedback signals. It can collect and store the voltage signal of the photoresistor change and can provide feedback on the signal.

[0045] In this embodiment, the internal photoelectric effect of a photoresistor is utilized. The stronger the light, the lower the resistance. As the light intensity increases, the resistance decreases rapidly, and the bright resistance value can be as small as 1KΩ or less. The photoresistor is very sensitive to light. When there is no light, it is in a high-resistance state, and the dark resistance can generally reach 1.5MΩ. When the light source in the composite tube is constant, the size of the gap between the composite tubes directly affects the intensity of light received in the adjacent composite tubes, and thus affects the resistance of the photoresistor. When the photoresistor is used in a closed circuit, the voltage of the corresponding photoresistor will change. By measuring the light characteristics of a photoresistor of a certain specification, the axial gap can be ultimately associated with the voltage of the photoresistor. Ultimately, the size of the honeycomb clamping gap of the composite tube is obtained by the size of the photoresistor voltage.

[0046] In actual application, the distance obtained according to the value of the photoresistor needs to be determined for different photoresistors and different light sources. The specific formula must be obtained through specific experimental measurements after determining the photoresistor and light source.

[0047] The present invention also discloses a method for using a device for detecting the fit gap between an array composite tube component and a fixture, comprising the following steps:

[0048] Step 1: Install the device 10 on the machine tool spindle according to the testing requirements. Place the array composite tube blank on the base plate 12. During installation, ensure that the detection device does not contact the array composite tube blank 11 to be tested. The angle of the installation device must match the angle of the array of workpieces to be processed. The center of the central array composite tube can accommodate the light source, and the array composite tubes connected to it and ring-connected around the central array composite tube can each accommodate the corresponding photoresistor. The interior of the array composite tube does not contact the light source, photoresistor, or the extension rods connected to it. During installation, the first extension rod and each second extension rod do not enter the same composite tube as the internal expansion device 9.

[0049] Step 2: Move the main shaft horizontally so that the detection device is placed above the array composite tube to be detected;

[0050] Step 3: Move the spindle in the Z-axis direction, allowing the detection device to penetrate the inner wall of the array composite tube. The lowering height must meet the preset height of the light source and photoresistor above the fixture surface. By slightly above the fixture surface, the photoresistor and light source are prevented from contacting and squeezing the fixture surface, causing unnecessary damage. During this step, the photoresistor and light source are in the off state.

[0051] Step 4. Turn on the photoresistor switch and record the resistance value of the photoresistor under ambient light conditions to compare with the resistance value of the photoresistor when the light source is on.

[0052] Step 5: Turn on the light source switch and record the resistance value of the photoresistor. The control system calculates the axial gap of the array composite tube according to the change value of the photoresistor.

[0053] Furthermore, in step 1, the height of the machine tool spindle is higher than the sum of the height of the workpiece to be inspected and the height of the inspection device.

[0054] Furthermore, after step 5, the following steps are also included:

[0055] Step 6: Move the spindle in the Z-axis direction to move the detection device out of the array composite tube;

[0056] Step 7: Repeat steps 2-6 to detect the next array composite tube to be detected until all array composite tubes to be detected are detected.

[0057] Finally, it should be noted that 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting the fit gap between an array composite tube component and a fixture, characterized in that: It includes an extension rod, a light source, a photoresistor, a spindle connection device and a control system. The extension rod includes a first extension rod and several second extension rods, and the several second extension rods are surrounded by the periphery of the first extension rod. The first extension rod is connected to the light source, and each second extension rod is equipped with a photoresistor. The head of each photoresistor faces the central light source. The extension length of each extension rod is adjustable. The extension rod is installed at the output end of the spindle connection device, and the spindle connection device is installed at the output end of the spindle. The light source, photoresistor and extension rod are all connected to the control system.

2. The device for detecting the fit gap between an array composite tube member and a fixture according to claim 1, characterized in that: The number of the second extending rods is at least 6 and they are evenly distributed around the central light source at a preset angle.

3. The device for detecting the fit clearance between an array composite tube member and a fixture according to claim 1, characterized in that: The length of the protruding rod is at least 20-30 mm higher than the height of the detected array composite tube.

4. The device for detecting the fit clearance between an array composite tube member and a fixture according to claim 1, characterized in that: The photoresistor is a sealed photoresistor, and the dark resistance and light resistance of the selected photoresistor are both within a preset range, and the resistance variation range is matched with the collectible range of the control system voltage collection device.

5. The method for using the device for detecting the fit gap between an array composite tube member and a fixture according to any one of claims 1 to 4, characterized in that: The steps include: Step 1: Install the device on the machine tool spindle according to the detection requirements. During installation, ensure that the detection device does not contact the workpiece to be inspected. The angle of the installation device must match the angle of the workpiece array to be processed. The center of the central array composite tube can accommodate the light source, and the array composite tubes connected to it and ring-connected around the central array composite tube can each accommodate the corresponding photoresistor. The interior of the array composite tube does not contact the light source, photoresistor, or the extended rod connected to it. Step 2: Move the main shaft horizontally so that the detection device is placed above the array composite tube to be detected; Step 3: Move the spindle in the Z-axis direction to allow the detection device to penetrate into the inner wall of the array composite tube. The lowering height must be such that the light source and the photoresistor are higher than the preset value of the fixture surface. Step 4. Turn on the photoresistor switch and record the resistance value of the photoresistor under ambient light conditions; Step 5: Turn on the light source switch and record the resistance value of the photoresistor. The control system calculates the axial gap of the array composite tube according to the change value of the photoresistor.

6. The method according to claim 5, characterized in that In step 1, the height of the machine tool spindle is higher than the sum of the height of the workpiece to be inspected and the height of the inspection device.

7. The method according to claim 5, characterized in that After step 5, the following steps are also included: Step 6: Move the spindle in the Z-axis direction to move the detection device out of the array composite tube; Step 7: Repeat steps 2-6 to detect the next array composite tube to be detected until all array composite tubes to be detected are detected.

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