Device and method for detecting uniformity of internal mixing powder distribution of profiled spiral composite rod

Abstract

The present application relates to the detection device and method of the internal mixed powder distribution uniformity of the special-shaped spiral composite rod, belongs to the composite material detection technical field, and includes: a driving mechanism connected with a clamping mechanism, used for driving the clamping mechanism to move; the clamping mechanism clamps the composite rod and drives the composite rod to move; a detection mechanism: the detection mechanism cooperates with the composite rod and detects the corresponding position of the composite rod.The device and method for the detection of the internal mixed powder distribution uniformity of the special-shaped section composite rod with large length-diameter ratio can efficiently and accurately complete the detection work of the internal mixed powder composition distribution of the composite rod; the present application has the advantages of simple operation, high detection precision, strong adaptability and the like, can meet the strict requirements of the composite rod detection, and provides strong technical support for the production and quality control of the complex structure composite rod.

Description

Technical Field

[0001] This invention relates to a composite material testing device and method, belonging to the field of composite material testing technology. Background Technology

[0002] With the rapid development of advanced manufacturing technologies, irregularly shaped helical composite material components have shown significant advantages in powder metallurgy forming and multiphase composite material preparation. Their complex geometry can effectively optimize thermal and mechanical conductivity and improve energy utilization efficiency. However, during the preparation process, the density gradient differences of different powders easily lead to heterogeneity in material distribution, directly affecting the service performance of components in powder metallurgy, energy conversion, and other scenarios. Existing industrial inspection systems are mainly designed for simple, regular cross-section standard parts, using fixed X-ray scanning schemes for linear inspection. This approach has significant limitations when dealing with variable curvature helical structures: on the one hand, it is difficult to achieve distributed inspection of multiple material systems; on the other hand, it lacks the ability to adaptively identify spatially twisted interfaces. In particular, for irregularly shaped powder metallurgy components with pitch characteristics, traditional mechanical transmission systems cannot synchronously coordinate rotary feed and axial displacement, leading to the accumulation of defect location errors.

[0003] Therefore, there is an urgent need to develop a detection device and method for the uniformity of powder distribution inside irregularly shaped spiral composite rods in order to solve the above-mentioned technical problems. Summary of the Invention

[0004] To address the aforementioned problems, a device and method for detecting the uniformity of powder distribution within an irregularly shaped spiral composite rod are provided. A brief overview of the invention is given below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0005] The technical solution of this invention: A device for detecting the uniformity of powder distribution inside irregularly shaped spiral composite rods includes: Drive mechanism: The drive mechanism is connected to the clamping mechanism and is used to drive the movement of the clamping mechanism; Clamping mechanism: The clamping mechanism clamps the composite rod and drives the composite rod to move; Testing agency: The testing agency will cooperate with the composite rod to conduct tests on the corresponding positions of the composite rod.

[0006] Preferably, the drive mechanism includes a device frame, a cable chain, a carriage, a servo motor, a gear, and a rack. The carriage is slidably connected to the device frame. The rear end of the carriage is connected to the clamping mechanism. The front end of the carriage is bolted to the servo motor. A rack is fixedly installed on the front side of the device frame. The gear is connected to the output end of the servo motor. The gear meshes with the rack. Both ends of the cable chain are connected to the device frame and the carriage, respectively.

[0007] Preferably, the clamping mechanism includes a split-type magnetoelectric encoder and a chuck. The stationary part of the split-type magnetoelectric encoder is bolted to the slide, the moving part of the split-type magnetoelectric encoder is rotatably connected to the slide, the moving part of the split-type magnetoelectric encoder is connected to the chuck, and the chuck is connected to the composite material.

[0008] Preferably, the clamp includes a first clamping block and a second clamping block. The second clamping block is semi-circular, the left side of the first clamping block is semi-circular, and the right side is C-shaped. The second clamping block and the first clamping block are arranged to form a ring, and the right end of the composite rod is clamped in the central hole of the ring. The right side of the first clamping block is fitted onto the moving part of the split-type magneto-electric encoder.

[0009] Preferably, the clamping mechanism further includes a guide mold, which has a through hole and is fixedly connected to the left end of the equipment frame. The guide mold cooperates with the detection mechanism.

[0010] Preferably, the detection mechanism includes a detector and a radiation source. The detector and radiation source are installed on the left end of the equipment frame and are located on the upper sides of the equipment frame, so that the composite rod extending from the through hole of the guide mold is located between the detector and the radiation source.

[0011] Preferably, it also includes a support base, which includes a base and a support member. The support member is fixed at both ends of the base and has a groove. The composite material is located in the groove. The groove, the guide mold through hole, and the split magneto-electric encoder are coaxially arranged.

[0012] A method for detecting the uniformity of powder distribution inside an irregularly shaped spiral composite rod includes the following steps: S1: Fix the composite bar to be tested in the chuck, and adjust the limiting hole and the chuck to adapt to the cross-sectional shape of the composite; S2: The gear is driven to rotate by a servo motor. The gear and rack work together to make the composite material move in a uniform linear motion and rotate adaptively in the limiting hole. S3: Activate the americium source radiation detection mechanism so that the radiation source emits radiation that penetrates the composite rod, and the detector receives the signal after penetration; S4: The computer processes the signals received by the detector and calculates the axial distribution uniformity of the composite filler rod.

[0013] The present invention has the following beneficial effects: The apparatus and method of the present invention for detecting the uniformity of powder distribution inside a composite rod with a large aspect ratio and irregular cross-section can efficiently and accurately complete the detection of the component distribution of the powder inside the composite rod. This invention has the advantages of simple operation, high detection accuracy, and strong adaptability. It can meet the strict requirements of composite rod testing and provides strong technical support for the production and quality control of complex structure composite rods. Attached Figure Description

[0014] Figure 1 This is a three-dimensional diagram of a device for detecting the uniformity of powder distribution inside an irregularly shaped spiral composite rod. Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a partial view of a device for detecting the uniformity of powder distribution inside an irregularly shaped spiral composite rod. Figure 4 yes Figure 3 BB section view; Figure 5 This is a schematic diagram of the clamping mechanism; Figure 6 This is a schematic diagram of a device for detecting the uniformity of powder distribution inside an irregularly shaped spiral composite rod. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0016] Specific implementation method one: Combining Figure 1-6 This embodiment describes a device for detecting the uniformity of powder distribution inside a shaped spiral composite rod, comprising: Drive mechanism: The drive mechanism is connected to the clamping mechanism and is used to drive the movement of the clamping mechanism; Clamping mechanism: The clamping mechanism clamps the composite rod 8 and drives the composite rod 8 to move; Testing agency: The testing agency will cooperate with composite rod 8 to conduct testing on the corresponding positions of composite rod 8; Composite rod 8 is an irregularly shaped spiral composite rod.

[0017] Specific Implementation Method Two: Combining Figure 1-6This embodiment describes a device for detecting the uniformity of powder distribution inside a shaped spiral composite rod. The driving mechanism includes a frame 4, a drag chain 5, a slide 10, a servo motor 12, a gear 13, and a rack 14. The lower part of the slide 10 has a slider, and the upper part of the frame 4 has a linear slide rail. The rack 14 is parallel to the linear slide rail, and the slider is slidably connected to its corresponding linear slide rail, thus achieving a sliding connection between the slide 10 and the frame 4. The rear end of the slide 10 is connected to a clamping mechanism, and the front end of the slide 10 is connected to the servo motor. The motor 12 is bolted to the front of the equipment frame 4, and a rack 14 is fixedly installed on the front side. The gear 13 is connected to the output end of the servo motor 12 and meshes with the rack 14. The two ends of the drag chain 5 are bolted to the middle of the equipment frame 4 and the slide 10 respectively to prevent the slider from derailing. The movement speed of the servo drive mechanism is adjustable, with a speed range of 0.1mm / s-100mm / s, to adapt to spiral (pitch range: 100-1000mm) composite bars with different cross-sectional sizes (top diameter 3-15mm) and lengths (0.1-2m).

[0018] Specific implementation method three: Combining Figure 1-6 This embodiment describes a device for detecting the uniformity of powder distribution inside a shaped spiral composite rod. The clamping mechanism includes a split-type magnetoelectric encoder 11 and a flexible chuck 2. The stationary part of the split-type magnetoelectric encoder 11 is bolted to the slide 10, and the moving part of the split-type magnetoelectric encoder 11 is rotatably connected to the slide 10 through a deep groove ball bearing. The left end of the moving part of the split-type magnetoelectric encoder 11 is fastened to the chuck 2, and the chuck 2 is fastened to the composite rod 8.

[0019] Specific implementation method four: Combination Figure 1-6 This embodiment describes a device for detecting the uniformity of powder distribution inside a shaped spiral composite rod. The clamp 2 includes a first clamping block 18 and a second clamping block 19. The second clamping block 19 is semi-annular, with second through holes on its front and rear sides. The left side of the first clamping block 18 is semi-annular, with second threaded holes on its front and rear sides, and a C-shape on its right side. The second clamping block 19 and the first clamping block 18 are correspondingly arranged to form a complete ring, clamping the right end of the composite material in the central hole of the ring. The second bolt passes through the second through hole and is threaded into the second threaded hole to clamp and fix the composite material. The tightening of the bolt can be adjusted to accommodate various composite materials. The right side of the first clamping block 18 is fitted onto the moving part of the split-type magneto-electric encoder 11. The C-shaped ends on the right side of the first clamping block 18 have a first through hole and a second threaded hole parallel to the radial direction, respectively. The second bolt passes through the first through hole and is threaded into the second threaded hole to clamp and fix the moving part of the split-type magneto-electric encoder 11, realizing a detachable connection and achieving universal adaptation to various irregularly shaped composite rods.

[0020] Specific Implementation Method Five: Combining Figure 1-6This embodiment describes a device for detecting the uniformity of powder distribution inside a shaped spiral composite rod. The clamping mechanism further includes a guide mold 16. The guide mold 16 has a through hole along the composite material's axial direction. The guide mold 16 is fixedly connected to the left end of the equipment frame 4. The axis of the through hole in the guide mold 16 corresponds to the axis of the chuck 2, and the guide mold 16 engages with the detection mechanism. The guide mold 16 includes a housing with a through cavity and an end cap. The housing with the through cavity is fixedly connected to the equipment frame 4, and the left end of the housing with the through cavity is detachably connected to the end cap. The end cap has a limiting through hole in its center. Depending on the size, shape, and position of the composite material 8, a suitable end cap can be replaced to ensure accurate alignment between the composite material 8 and the detection mechanism, facilitating detection and improving accuracy. The limiting through hole of this invention incorporates an adjustable pitch adapter component to ensure that the detection area of ​​the composite rod remains aligned with the radiation source and detector throughout the rotation process.

[0021] Specific Implementation Method Six: Combination Figure 1-6 This embodiment describes a detection device for the uniformity of powder distribution inside a shaped spiral composite rod. The detection mechanism is an americium source X-ray detection mechanism, which includes an X-ray receiving detector 1 and a radiation source 6. The X-ray receiving detector 1 and the radiation source 6 are fixedly or detachably installed on the left end of the equipment frame 4. The X-ray receiving detector 1 and the radiation source 6 are located on the left side of the equipment frame 4, and the detector 1 and the radiation source 6 are located on the upper sides of the equipment frame 4, so that the composite material 8 extending from the through hole of the guide mold 16 is located between the detector 1 and the radiation source 6. The composite material 8 is correspondingly set with the detection mechanism. The computer 3 is electrically connected to the detection mechanism, the servo motor 12, and the split-type magneto-electric encoder 11.

[0022] Specific implementation method seven: Combining Figure 1-6 This embodiment describes a device for detecting the uniformity of powder distribution inside a shaped spiral composite rod. The device also includes a support base, which includes a base 7 and a support member 9. The support member 9 is fixed at both ends of the base 7 and has a groove. The composite material 8 is located in the groove. The groove, the guide mold 16 through hole, and the split-type magneto-electric encoder 11 are coaxially arranged.

[0023] This invention enables precise detection of the internal powder distribution of irregularly shaped composite rods with various cross-sectional shapes. A servo drive module, through precise control, clamps one end of the composite rod and moves it linearly at a uniform speed along a predetermined path. The other end of the composite rod (composite material 8) is constrained by a limiting groove (limiting through hole), which can adaptively adjust the pitch and rotation during detection, ensuring the composite rod maintains a fixed posture at the detection location, thereby improving detection accuracy. The detection system uses an americium source as the radiation penetration source, combined with a highly sensitive receiving sensor, to calculate the axial uniformity distribution of the composite rod by analyzing the changes in penetration signal loss in real time. The device also integrates a modular mold-changing function, adaptable to composite rods of different shapes, improving equipment versatility. To further optimize the detection effect, the device is equipped with a highly stable structural support and dynamic adjustment function, effectively avoiding detection deviations caused by external interference. This invention not only significantly improves the accuracy and efficiency of detecting the uniformity of mixed powder in irregularly shaped composite rods but also has wide applicability in the field of composite material manufacturing and testing, especially in the detection of complex composite material rods, where it has significant application value.

[0024] Specific implementation method eight: Combination Figure 1-6 This embodiment describes a method for detecting the uniformity of powder distribution inside a shaped spiral composite rod. The method employs the aforementioned detection device for the uniformity of powder distribution inside the shaped spiral composite rod. A driving mechanism drives the clamping mechanism of the composite 8, enabling the composite rod to move at a constant speed along a straight line. The clamping device includes a chuck and a guide mold, used to clamp the composite rod / material and restrict its axial degrees of freedom during movement, while allowing it to rotate adaptively within a limiting groove. An americium source X-ray detection mechanism includes a radiation source and a radiation receiving detector. The radiation source is fixed on one side of the detection path, and the detector is located on the other side of the composite rod, used to receive the signal after the radiation penetrates the composite rod. A signal processing unit, connected to the radiation receiving detector, is used to calculate the axial uniformity of the two phases of the composite rod based on the received signal loss. The signal processing unit includes a signal filtering module and an algorithm analysis module to enhance the stability of the penetration signal and improve data processing accuracy. The data processing module uses a computer control system and is connected to a PC via a USB interface. The method includes the following steps: S1: Fix the composite material 8 to be tested in the chuck 2, and adjust the limiting hole and the chuck to adapt to the cross-sectional shape of the composite material 8; In this step, place the composite material rod to be tested on the support 9 and let one end of it pass through the through hole of the guide mold 16; Secure the composite material rod with the chuck to ensure that it remains stable during the movement. S2: The servo motor 12 drives the gear 13 to rotate. The gear 13 cooperates with the rack 14 to make the composite material 8 move linearly at a constant speed. It also rotates adaptively in the limiting hole through the split magneto-electric encoder 11. In this step, the feed speed and detection parameters of the composite material bar are set on the computer control platform, the servo drive module is started, and the composite material bar moves linearly at a constant speed. Under the constraint of the limiting mold, it can automatically rotate to adapt to the detection requirements of different cross-sectional shapes. S3: Activate the americium source radiation detection mechanism so that the radiation source emits radiation that penetrates the composite rod, and detector 1 receives the signal after penetration; in this step, activate the radiation detection module so that the gamma source emits radiation that penetrates the composite rod, and the signal receiving device records the radiation attenuation data in real time. S4: The signal processing unit of computer 3 processes the signal received by detector 1 and calculates the axial distribution uniformity of the composite filler rod. In this step, the data analysis module receives and processes the attenuation data, compares it with the maximum density deviation value of the standard composite rod, analyzes the uniformity of the axial and radial density of the composite rod, and outputs feedback results to show the density dispersion. S5: The system provides feedback on the uniformity of the composite rod and suggests methods to improve production process parameters; This invention innovatively develops a distribution detection system based on servo-cooperative control. By establishing a real-time monitoring mechanism for feed position and density distribution, it enables the detection of the internal material composition distribution of powder components with complex three-dimensional cross-sections. This technology breaks through the unidirectional scanning mode of traditional detection devices and adopts a cooperative strategy of high-precision X-ray source and adaptive limiting device, which significantly improves the quality assessment accuracy of irregular composite rods in scenarios such as powder metallurgy forming and energy material preparation, providing a reliable detection guarantee for the manufacturing of high-performance composite materials.

[0025] Example 1: The present invention provides a device and method for detecting the uniformity of powder distribution inside an irregularly shaped spiral composite rod. This is mainly achieved through the collaborative operation of components such as a servo drive and clamping module, a limiting and rotation module, an X-ray source and signal receiving module, and a data processing and feedback module. The specific implementation steps are as follows: S1: Fixing and Preparation of the Composite Rod: First, place the composite rod to be tested on the support base and fix it using a clamp. This clamp consists of a chuck and a support structure. The chuck, through precise mechanical design, can firmly hold the composite rod, preventing displacement during testing. The design of the support structure needs to consider the length, shape, and weight of the composite rod to ensure that the composite rod does not experience any displacement or deviation during testing, thereby guaranteeing testing accuracy.

[0026] To further ensure the stability of the composite rod during movement, an anti-slip material can be added to the support surface of the clamp. The support base should ensure the docking accuracy with other parts of the device and be able to withstand the weight of the composite rod and the inertial forces during movement. After the composite rod is fixed, it is connected to the drive system through the control system to prepare for subsequent movement and testing. The key point of this step is to ensure that the composite rod does not shift position or cause errors due to unstable clamping throughout the testing process. Therefore, during the fixing process, the clamp should be adjusted strictly according to the size requirements of the composite rod to ensure uniform clamping force and avoid local deformation.

[0027] S2: Setting Detection Parameters and Starting the Servo Drive: After fixing the composite rod to the support base, the next step is to set the detection parameters via a computer control platform. This includes the feed speed of the composite rod, the emission intensity of the X-ray source, and the sampling frequency of the X-ray receiving signal. All these parameters should be adjusted according to the material and size of the composite rod and the required detection accuracy.

[0028] Feed rate is a crucial factor in ensuring that the X-ray source and signal receiving module can continuously and stably monitor the two-phase distribution within the composite rod. Generally, the feed rate should be kept within a constant range to avoid affecting the accuracy of X-ray detection due to excessively fast or slow speeds. When setting parameters, the speed needs to be adjusted according to the size and shape of different types of composite rods to ensure that each detection area receives a sufficient amount of X-ray irradiation.

[0029] After setting all parameters, the servo drive module is activated, causing the composite bar to move at a constant speed along the predetermined path. The servo motor provides high-precision control, which can accurately adjust the feed speed and position of the composite bar, ensuring smooth movement of the composite bar within the detection area without any deviation.

[0030] The accuracy and response speed of the servo drive module are crucial to the entire detection process. Therefore, the drive system should be selected with high response speed and high precision control capabilities to ensure that the composite rod passes through the detection area between the X-ray source and the signal receiving module at an appropriate speed.

[0031] S3: Activate the X-ray source for detection: When the composite rod moves at a constant speed and along the set path, activate the X-ray source for X-ray detection. The X-ray source is generally a gamma-ray source, which can effectively penetrate the material of the composite rod and produces different degrees of attenuation depending on the material density.

[0032] The X-ray source and signal receiving module are positioned on opposite sides of the composite rod to ensure that the X-rays can penetrate from one side of the composite rod and be received by the receiving module. During this process, the gamma-ray source needs to ensure continuous and stable emission of X-rays, and the intensity and angle of the X-rays should remain constant to guarantee the uniformity and accuracy of the detection.

[0033] The signal receiving module records the attenuation of the radiation in real time. The degree of radiation attenuation is directly related to the density distribution inside the composite rod. Therefore, the signal receiving module can generate a series of data representing the density changes at different locations within the composite rod. The attenuation data is closely related to factors such as the material, thickness, and internal structure of the composite rod. Therefore, the emission intensity of the radiation source and the sensitivity of the receiving module need to be adjusted according to different types of composite rods. The key to this step is to obtain real-time density distribution data inside the composite rod through radiation attenuation, providing a foundation for subsequent data processing and analysis.

[0034] S4: Data Reception and Processing: After the signal receiving module converts the X-ray attenuation data into an electrical signal and transmits it to the data processing module, the computer control system begins to process and analyze the received data. The data processing module compares and analyzes the attenuation data with the density distribution data of a standard composite rod. By analyzing the density deviation of the composite rod, it determines whether it meets the design standards.

[0035] The core of the data processing lies in analyzing whether the internal distribution of the composite rod is uniform by comparing the attenuation data with the density values ​​of the standard model. Specifically, the system calculates the density value at each location and compares it with the standard value to determine whether there is a significant deviation in the two-phase distribution of the composite rod.

[0036] To improve the accuracy and efficiency of data processing, this invention employs a highly efficient algorithm that can rapidly process large amounts of data and provide real-time feedback. The computer system compares the data with the standard deviation and outputs the test results. If the density deviation exceeds the preset tolerance range, the system will automatically identify the non-compliant areas and mark the problematic locations for further inspection and adjustment by staff.

[0037] S5: Feedback and Adjustment: After analyzing the density distribution of the composite rods, the data processing module provides feedback via computer. When the results indicate that the density distribution of the composite rods is uneven, the system can provide corresponding feedback, suggesting directions for improving the production process. For example, if a portion is found to have a low density, it may be due to uneven raw material ratios or improper temperature control during processing; the system will then suggest improvements to the production process parameters.

[0038] Timely feedback and adjustments enable efficient quality control during production, thereby improving the consistency and quality stability of composite rod production. Operators taking action based on feedback helps eliminate instability factors in production, ensuring the final product meets design requirements.

[0039] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutation and combination. Therefore, the present invention will not describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for detecting the uniformity of powder distribution inside an irregularly shaped spiral composite rod, characterized in that: include: Drive mechanism: The drive mechanism is connected to the clamping mechanism and is used to drive the movement of the clamping mechanism; The drive mechanism includes a device frame (4), a cable chain (5), a slide (10), a servo motor (12), a gear (13), and a rack (14). The slide (10) is slidably connected to the device frame (4). The rear end of the slide (10) is connected to the clamping mechanism. The front end of the slide (10) is bolted to the servo motor (12). A rack (14) is fixedly installed on the front side of the device frame (4). The gear (13) is connected to the output end of the servo motor (12). The gear (13) meshes with the rack (14). The two ends of the cable chain (5) are connected to the device frame (4) and the slide (10) respectively. Clamping mechanism: The clamping mechanism clamps the composite rod (8) and drives the composite rod (8) to move; The clamping mechanism includes a split-type magneto-electric encoder (11) and a chuck (2). The stationary part of the split-type magneto-electric encoder (11) is bolted to the slide (10), the moving part of the split-type magneto-electric encoder (11) is rotatably connected to the slide (10), the moving part of the split-type magneto-electric encoder (11) is connected to the chuck (2), and the chuck (2) is connected to the composite rod (8). The clamping mechanism also includes a guide mold (16), which has a through hole. The guide mold (16) is fixedly connected to the left end of the equipment frame (4), and the guide mold (16) cooperates with the detection mechanism. The guide mold (16) includes a housing with a through cavity and an end cap, the end cap having a limiting through hole in the middle, the limiting through hole being equipped with an adjustable pitch adapter component; Testing agency: The testing agency cooperates with the composite rod (8) to test the corresponding position of the composite rod (8).

2. The device for detecting the uniformity of powder distribution inside the irregularly shaped spiral composite rod according to claim 1, characterized in that: The clamp (2) includes a first clamping block (18) and a second clamping block (19). The second clamping block (19) is semi-circular, the left side of the first clamping block (18) is semi-circular, and the right side is C-shaped. The second clamping block (19) and the first clamping block (18) are arranged to form a ring, and the right end of the composite rod is clamped in the central hole of the ring. The right side of the first clamping block (18) is fitted onto the moving part of the split magneto-electric encoder (11).

3. The device for detecting the uniformity of powder distribution inside the irregularly shaped spiral composite rod according to claim 2, characterized in that: The detection mechanism includes a detector (1) and a radiation source (6). The detector (1) and radiation source (6) are arranged accordingly and installed on the left end of the equipment frame (4). The detector (1) and radiation source (6) are located on the upper sides of the equipment frame (4), so that the composite rod (8) extending from the through hole of the guide mold (16) is located between the detector (1) and the radiation source (6).

4. The device for detecting the uniformity of powder distribution inside the irregularly shaped spiral composite rod according to claim 3, characterized in that: It also includes a support base, which includes a base (7) and a support member (9). The support member (9) is fixed at both ends of the base (7). The support member (9) has a groove, and the composite rod (8) is located in the groove. The groove, the guide mold (16) through hole, and the split magneto-electric encoder (11) are coaxially arranged.

5. A method for detecting the uniformity of powder distribution inside an irregularly shaped spiral composite rod, characterized in that: The device for detecting the uniformity of powder distribution inside an irregularly shaped spiral composite rod as described in any one of claims 1-4 is used. Includes the following steps: S1: Fix the composite rod (8) to be tested in the chuck (2), and adjust the limiting through hole and the chuck to adapt to the cross-sectional shape of the composite rod (8); S2: The servo motor (12) drives the gear (13) to rotate. The gear (13) and the rack (14) work together to make the composite rod (8) move in a straight line at a constant speed and rotate adaptively in the limiting through hole. S3: Start the americium source radiation detection mechanism so that the radiation source emits (6) radiation that penetrates the composite rod (8) and the detector (1) receives the signal after penetration; S4: The computer (3) processes the signal received by the detector (1) and calculates the axial distribution uniformity of the composite rod.

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