Correcting rod, compressor nozzle correcting device, apparatus and method

Abstract

The application discloses a correction rod, a compressor pipe orifice correction device, equipment and a method, wherein the correction rod comprises a rod body provided with an internal airflow channel, a correction cone head used for correcting a pipe orifice, and a pipe diameter detection part provided with a plurality of gas outlets. The correction rod is connected with a pneumatic flowmeter through the airflow channel, the correction cone head is used for physically correcting the compressor pipe orifice, and the pressure airflow is sprayed through the gas outlets, and the pneumatic flowmeter is used for detecting the airflow parameters to quantitatively judge the inner diameter size of the pipe orifice. The correction rod integrates the correction and detection functions, and solves the problems of process separation and low efficiency caused by manual operation in the prior art.

Description

Technical Field

[0001] This invention relates to the field of compressor manufacturing technology, and in particular to a calibration rod, a compressor nozzle calibration device, equipment, and method. Background Technology

[0002] In existing compressor manufacturing processes, to ensure the geometric accuracy of the compressor's suction and discharge pipes meets the subsequent assembly and welding requirements with air conditioning copper pipes, dedicated pipe alignment and inspection stations are typically set up on the production line. However, current technical solutions generally suffer from insufficient automation, resulting in low production efficiency. The root cause lies in the high dependence of the alignment and inspection processes on manual operation and the disconnect between different workflows.

[0003] Current technology typically employs a method where operators manually insert specialized calibration tools into the compressor nozzles for physical calibration. This method is not only labor-intensive but also results in long processing cycles for individual workpieces, becoming a bottleneck for production line efficiency. More importantly, the quality inspection of the calibrated nozzles still relies on the operator's visual observation and subjective experience. This inspection method lacks objective quantitative standards, making it difficult to accurately identify minor deformations or non-roundness defects in the nozzle's inner diameter, easily leading to misjudgments and missed detections. Especially when dealing with small-diameter pipes or high production cycles, the accuracy and consistency of manual judgment cannot be effectively guaranteed, resulting in low overall production efficiency and difficulties in product quality control. Summary of the Invention

[0004] The embodiments of the present invention provide a calibration rod, a compressor nozzle calibration device, equipment and method, which aim to solve the technical problem of low production efficiency caused by insufficient automation of nozzle calibration and qualification testing processes in the compressor production process under the prior art.

[0005] In a first aspect, the present invention provides a calibration rod, comprising: a rod body having an airflow channel therein, the airflow channel being used for connecting a pneumatic gauge and allowing pressurized airflow to pass through; a calibration cone head disposed at one end of the rod body for calibrating the inner diameter of the end pipe opening; and a pipe diameter detection part disposed on the rod body, the pipe diameter detection part having multiple air outlets along the circumference of the rod body, the air outlets being connected to the airflow channel and used for ejecting pressurized airflow.

[0006] Secondly, the present invention provides a compressor nozzle calibration device, comprising: a base for connecting a robotic arm; at least one calibration rod as described above disposed on the base; a vision sensor connected to the base, the vision sensor being used to acquire image information of the working area of ​​the calibration rod; wherein the head of the vision sensor and the calibration cone are arranged in the same direction.

[0007] Thirdly, the present invention provides a compressor nozzle calibration device, comprising the compressor nozzle calibration apparatus as described above, and further comprising: a flow table for transporting and carrying the compressor for nozzle calibration; a clamping device disposed adjacent to the flow table, the clamping device being used to fix the compressor located on the flow table; a robotic arm disposed above the flow table, the compressor nozzle calibration apparatus being disposed at one end of the robotic arm near the flow table, the robotic arm driving the compressor nozzle calibration apparatus to perform nozzle calibration on the compressor located on the flow table; a pneumatic gauge connected to the compressor nozzle calibration apparatus via a pipeline; and a central control device communicatively connected to the flow table, the robotic arm, the clamping device, and the pneumatic gauge.

[0008] Thirdly, the present invention provides a compressor nozzle calibration method, characterized in that it is applied to the compressor nozzle calibration equipment described above. The method includes: transporting the compressor to be processed to the processing position via a continuous workbench and fixing the position of the compressor by a clamping device; acquiring image information of the compressor nozzles via a vision sensor; calculating the position information of each nozzle based on the image information using a preset image processing algorithm and transmitting it to a robotic arm; driving a calibration rod to be inserted into the nozzle for nozzle calibration via the robotic arm; after the nozzle calibration is completed, introducing compressed air into the calibration rod and monitoring the working parameters of the compressed air using a pneumatic gauge, and comparing them with a preset acceptable range; when the working parameters are within the preset acceptable range, the product is determined to be qualified; driving the calibration rod to be pulled away from the nozzle via the robotic arm, releasing the compressor by the clamping device, and transporting the compressor to the next workstation via the continuous workbench.

[0009] Compared with the prior art, the beneficial effects of the present invention are: In the technical solution of this invention, the calibration rod includes a rod body with an internal airflow channel, a calibration cone for calibrating the pipe opening, and a pipe diameter detection part with multiple air outlets. The calibration rod is connected to a pneumatic gauge through the airflow channel. The calibration cone physically calibrates the compressor pipe opening, and pressurized airflow is ejected through the air outlets. The pneumatic gauge detects the airflow parameters to quantitatively determine the inner diameter of the pipe opening. This calibration rod integrates calibration and detection functions, achieving calibration and automated detection in a single insertion operation. It solves the problems of process separation and low efficiency due to manual labor in existing technologies, and has the technical effects of improving production efficiency, achieving objective quantitative detection, and reducing the risk of misjudgment and missed judgment. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of the calibration rod according to an embodiment of the present invention; Figure 2 This is another structural schematic diagram of the calibration rod according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the calibration rod according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the correction rod from two oblique side views according to an embodiment of the present invention; Figure 5 A is a partially enlarged view A of the structural schematic diagram of the correction rod in an embodiment of the present invention from two oblique side views; Figure 6 This is a schematic diagram of the calibration rod calibrating and testing the compressor nozzle according to an embodiment of the present invention; Figure 7 This is a partially enlarged view (B) of a schematic diagram illustrating the calibration and testing of the compressor nozzle by a calibration rod according to an embodiment of the present invention. Figure 8 This is a schematic diagram of the compressor pipe alignment device according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the compressor port calibration device according to an embodiment of the present invention, showing the structure of the device during the calibration and testing of the compressor port. Figure 10 This is a schematic diagram of the compressor pipe alignment device according to an embodiment of the present invention; Figure 11 This is a top view of the compressor nozzle alignment device according to an embodiment of the present invention; Figure 12 This is a flowchart of the compressor pipe port calibration method according to an embodiment of the present invention; Figure label explanation: 10. Correction rod; 11. Rod body; 12. Correction cone; 121. Guide cone; 122. Expansion correction section; 13. Pipe diameter detection section; 131. Air outlet; 132. Air outlet guide groove; 1321. First annular groove; 1322. Second long groove; 133. Jet guide recess; 14. Dispersion groove; 15. Airflow channel; 151. Air inlet; 20. Compressor pipe alignment device; 21. Base; 22. Vision sensor; 23. Quick-release clamping mechanism; 24. Flange seat; 31. Assembly line; 32. Clamping device; 33. Robotic arm; 34. Central control equipment; 40. Compressor; 41. Pipe port. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0013] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0014] To address the technical problem of low production efficiency caused by insufficient automation in the pipe port 41 calibration and qualification testing processes during the production of compressor 40 in the prior art, this invention proposes a calibration rod 10. (Refer to...) Figures 1 to 7 The calibration rod 10 includes: a rod body 11, which has an airflow channel 15 inside, the airflow channel 15 being used to connect to a pneumatic gauge and allow pressurized airflow to pass through; a calibration cone 12, located at one end of the rod body 11, used to calibrate the inner diameter of the end port 41; and a pipe diameter detection part 13, located on the rod body 11, the pipe diameter detection part 13 having multiple air outlets 131 along the circumference of the rod body 11, the air outlets 131 being connected to the airflow channel 15, and the air outlets 131 being used to eject pressurized airflow.

[0015] The calibration rod 10 of the present invention can be used to calibrate the inner diameter and measure the dimensions of components such as the suction and exhaust pipes of the compressor 40 that have end ports 41. The calibration rod 10 includes a hollow rod body 11, and an axially extending airflow channel 15 is provided inside the rod body 11. The air inlet 151 at one end of the airflow channel 15 is connected to the output end of a pneumatic measuring instrument through a flexible air guide tube to introduce compressed air at constant pressure or constant flow.

[0016] A calibration cone 12 is provided at one end of the rod body 11. The calibration cone 12 is shaped like a frustum of a cone, and its taper and maximum outer diameter are precisely machined according to the designed inner diameter of the pipe opening 41 to be calibrated. Under mechanical force, the calibration cone 12 can be inserted into the slightly deformed pipe opening 41, and the expansion effect of its conical surface will round the pipe opening 41, restoring its standard inner diameter. A pipe diameter detection part 13 is provided on the rod body 11 near the calibration cone 12. The pipe diameter detection part 13 has multiple air outlets 131 symmetrically arranged around the circumference of the rod body 11. Each air outlet 131 is connected to the airflow channel 15 through an internal flow channel.

[0017] After the calibration rod 10 is inserted into the pipe opening 41 and calibration is completed, the pneumatic gauge is activated. The pressurized airflow is uniformly ejected from multiple air outlets 131 through the airflow channel 15, forming a stable annular air gap with the inner wall of the pipe opening 41. The pneumatic gauge measures the size of this air gap in real time according to changes in back pressure or flow rate, thereby obtaining the actual inner diameter data of the pipe opening 41 and comparing it with the preset qualified range to achieve numerical objective detection. In the extended scheme of this embodiment, the multiple air outlets 131 can be arranged in two symmetrical groups to ensure uniform airflow distribution and improve the repeatability and stability of the detection.

[0018] The calibration rod 10 integrates physical calibration and pneumatic detection functions, and can be automatically operated by the robotic arm 33 to complete dual tasks in one insertion, which significantly improves production efficiency and quality control.

[0019] In one embodiment, the pipe diameter detection unit 13 further includes an outlet guide groove 132, which is disposed near the outlet 131 and is used to guide the airflow ejected from the outlet 131. The pipe diameter detection unit 13 also includes an outlet guide groove 132 disposed on the periphery of the rod body 11, adjacent to the outlet 131, for orderly guiding the pressurized airflow ejected from the outlet 131.

[0020] When the pneumatic gauge supplies air to the airflow channel 15, the airflow is ejected at high speed from the outlet 131. If there is no guiding structure, it is easy to form turbulent flow or generate reverse impact. This not only affects the stability of the measurement, but may also cause the calibration rod 10 or the workpiece being measured to vibrate slightly due to the airflow excitation, thereby affecting the detection accuracy and even causing fatigue damage to mechanical parts.

[0021] In this embodiment, the air outlet guide groove 132 serves as a guide and buffer structure for airflow, effectively guiding the ejected airflow smoothly along the axial or spiral direction, preventing disordered airflow diffusion, and ensuring the stability of the airflow field. The air outlet guide groove 132 can be a straight or spiral shallow groove, and its cross-sectional shape can be rectangular, trapezoidal, or semi-circular, formed on the surface of the rod 11 through precision machining.

[0022] In an extended embodiment, the air outlet channel 132 can be connected to the annular air dissipation channel 14 outside the rod body 11 to further guide the airflow to a safe area for discharge, avoiding interference with surrounding equipment or sensors.

[0023] This design significantly improves the stability and controllability of airflow during the pneumatic gauge's testing process, thereby enhancing the repeatability and accuracy of the pneumatic gauge's measurement results and providing a reliable guarantee for achieving high-precision automated testing.

[0024] In one embodiment, the air outlet guide groove 132 includes a first annular groove 1321, which is disposed on the periphery of the air outlet 131 and is formed by recessing inward along the periphery of the correction rod 10.

[0025] The air outlet guide groove 132 includes a first annular groove 1321, which is disposed on the periphery of the air outlet 131, that is, it extends circumferentially around the rod 11 at the location of the air outlet 131. The first annular groove 1321 is formed by indenting the peripheral sidewall of the correction rod 10, and its whole is an annular groove structure.

[0026] The primary function of the first annular groove 1321 is to serve as an initial buffer and convergence area for the airflow. When pressurized airflow is ejected from multiple outlets 131, it first converges into this annular space, preventing airflow jets from different directions from colliding directly or scattering radially. By confining the airflow within the annular area, circumferential pressure equalization and flow stabilization can be effectively achieved, creating stable conditions for the directional discharge of subsequent airflow. The width and depth of the first annular groove 1321 are specifically optimized according to the airflow pressure and flow rate to ensure that it can accommodate and smoothly transition the entire outlet airflow under normal operating conditions.

[0027] This structural design not only helps improve the signal-to-noise ratio of the pneumatic gauge's detection signal, but also reduces the slight wobbling of the calibration rod 10 caused by uneven airflow impact, thereby enhancing the reliability and accuracy of the entire calibration and detection process. It is particularly suitable for high-precision pneumatic measurement scenarios that are sensitive to vibration.

[0028] In one embodiment, the air outlet guide groove 132 further includes a second long groove 1322, which connects to the end of the first annular groove 1321 away from the correction cone 12 and extends in a direction away from the correction cone 12. The second long groove 1322 is formed by indentation along the circumferential sidewall of the correction rod 10.

[0029] The air outlet guide groove 132 also includes a second long groove 1322. One end of the second long groove 1322 is connected to the first annular groove 1321 on the side away from the correction cone 12, and the other end continues to extend axially away from the correction cone 12. The whole is a straight or slightly spiral long strip groove. The second long groove 1322 is also formed by indenting inward on the peripheral sidewall of the correction rod 10.

[0030] The second elongated groove 1322 serves as the main exhaust channel for the airflow. Together with the annular first annular groove 1321, it forms a composite flow-guiding structure that first gathers air in an annular shape and then directs it axially. When the airflow exits from multiple outlets 131 and enters the first annular groove 1321, the uniformly gathered gas can smoothly exit along the second elongated groove 1322 towards the outside of the calibration rod 10, i.e., away from the workpiece. This effectively prevents gas from accumulating or forming vortices near the nozzle 41, thus ensuring the dynamic stability of the airflow field during measurement. This structural design ensures that the pneumatic detection process is unaffected by turbulence, significantly improving the smoothness and repeatability of the pneumatic gauge readings.

[0031] In one extended embodiment, two or more circumferentially distributed second elongated slots 1322 can be provided to further improve exhaust efficiency and symmetry, and reduce the influence of aerodynamic reaction force on the attitude of the correction rod 10. In addition, the outlet end of the second elongated slot 1322 can face the exhaust area of ​​the device or the gas collection hood, so as to facilitate the centralized treatment of the used gas and maintain the cleanliness of the working environment.

[0032] In one embodiment, the pipe diameter detection unit 13 further includes a jet guiding recess 133, which is located at the connection between the peripheral sidewall of the rod 11 and the first annular groove 1321, and a plurality of jet guiding recesses 133 are evenly distributed around the air outlet 131 as the center.

[0033] The pipe diameter detection unit 13 also includes a jet guiding recess 133, which is disposed in the connection area between the peripheral sidewall of the rod body 11 and the first annular groove 1321, specifically at the transition position between the air outlet 131 and the first annular groove 1321. Multiple jet guiding recesses 133 are evenly distributed around the central axis of the air outlet 131 in a radial pattern around the rod body 11, forming a radial micro-recessed structure. Each jet guiding recess 133 is shallow, only partially recessed on the surface of the rod body 11, with a smooth transition between its bottom surface and the peripheral sidewall. Its overall size is small and does not affect the overall structural strength of the calibration rod 10.

[0034] Its core function is to guide and divert the high-speed jet in the initial stage when the pressurized airflow is ejected from the outlet 131 and enters the first annular groove 1321, so as to avoid the airflow directly impacting the inner wall of the pipe 41 or the edge of the first annular groove 1321 in the form of a concentrated jet, thereby effectively suppressing the vibration, howling or measurement signal fluctuation caused by uneven local airflow impact.

[0035] By dispersing the airflow into multiple more uniform micro-flows, the jet guiding recess 133 further improves the smoothness of the airflow entering the first annular groove 1321, making the feedback signal of the pneumatic gauge more stable and reliable. In an extended embodiment, the jet guiding recess 133 can be designed as a fan-shaped, arc-shaped, or trapezoidal groove structure, and its number and distribution density can be adjusted according to different pipe diameter detection requirements. For example, in high-precision detection scenarios, multiple equally divided arrangements can be used to achieve better airflow control performance.

[0036] This structure significantly enhances the stability of the calibration bar 10 during dynamic measurement, reduces system noise, and improves detection sensitivity and repeatability.

[0037] In one embodiment, the calibration rod 10 further includes an air diffuser groove 14 connected to the second elongated groove 1322. The air diffuser groove 14 is located on the side of the pipe diameter detection section 13 away from the calibration cone 12.

[0038] The calibration rod 10 also includes a diffuser groove 14, which is located on the side of the pipe diameter detection section 13 away from the calibration cone 12 and is connected to the end of the second long groove 1322, serving as the final exhaust structure of the exhaust guide groove 132 system.

[0039] The main function of the diffuser 14 is to perform secondary diffusion and slow release of the concentrated airflow guided by the second long slot 1322, preventing the high-speed airflow from being suddenly released at the outlet, which could generate eddies, jet noise, or disturb the surrounding environment. Specifically, the cross-sectional area of ​​the diffuser 14 gradually increases in the direction of airflow, forming a flared or trumpet-shaped groove structure, which allows the airflow pressure to decrease smoothly during discharge, effectively dissipating kinetic energy. This design not only improves the stability and quietness of the entire aerodynamic monitoring system, but also helps maintain the stable posture of the calibration rod 10, preventing minor vibrations caused by exhaust reaction force fluctuations, which could affect measurement accuracy.

[0040] This structure, without altering the core functions of calibration and testing, further enhances the engineering sophistication of the device and its applicability in high-cycle automated production lines.

[0041] In one embodiment, the correction cone 12 includes a guide cone 121 and an expansion correction part 122. The guide cone 121 is disposed at the end of the rod body 11, and the expansion correction part 122 is disposed on the side of the guide cone 121 near the pipe diameter detection part 13. An included angle is provided between the peripheral side surface of the guide cone 121 and the peripheral side surface of the expansion correction part 122.

[0042] The correction cone 12 includes a guide cone 121 and an expansion correction section 122, which together form a stepped composite cone structure. The guide cone 121 is located at the foremost end of the rod body 11, and is a sharp cone with a relatively small cone angle. Its main function is to guide and align the tube opening 41 during the initial insertion stage. Even if the tube opening 41 has slight deviation or deformation, the guide cone 121 can still cut in smoothly, guiding the entire correction rod 10 to enter smoothly along the axis of the tube opening 41. The expansion correction section 122 is located on the side of the guide cone 121 near the tube diameter detection section 13. Its outer diameter is larger than the maximum diameter of the guide cone 121, and its circumferential surface has a frustum or cylindrical transition cone structure, which is used to perform a substantial expansion correction effect on the inner wall of the tube opening 41.

[0043] As the correction rod 10 is further inserted, the expansion correction section 122 contacts the inner wall of the nozzle 41 and applies radial force, gradually restoring deformations such as narrowing and ellipticity caused by processing or handling to a standard circle and the designed inner diameter. A distinct angle is formed between the circumferential surface of the guide cone 121 and the circumferential surface of the expansion correction section 122. This angle structure mechanically generates a stress-relieving point, helping to break the plastic deformation of the nozzle 41's metal material and improving the thoroughness and consistency of the correction effect.

[0044] In one extended embodiment, the included angle can be designed as an obtuse transition or a stepped structure with rounded chamfers to balance the correction force and the smoothness of insertion, and to avoid scratching damage to the edge of the tube opening 41.

[0045] The composite correction cone 12 structure takes into account guidance, correction force and operational reliability, and is suitable for compressor 40 nozzles 41 with different materials and wall thicknesses, which significantly improves the versatility and durability of the correction rod 10.

[0046] The present invention also discloses a compressor pipe alignment device 20, referring to... Figure 8 and Figure 9 The system includes: a base 21 for connecting a robotic arm 33; at least one calibration rod 10 as described in any of the above embodiments disposed on the base 21; and a vision sensor 22 connected to the base 21, wherein the vision sensor 22 is used to acquire image information of the working area of ​​the calibration rod 10; wherein the head of the vision sensor 22 and the calibration cone 12 are arranged in the same direction.

[0047] The compressor port alignment device 20 can be used to automatically position, align, and detect the suction and discharge ports 41 of the compressor 40. The device includes a base 21 for connecting the robotic arm 33. The base 21 serves as the mounting and support platform for the entire device and is fixedly connected to the end effector of the industrial robotic arm 33 via a standard flange interface, enabling precise transmission of posture and position. At least one alignment rod 10 is mounted on the base 21.

[0048] A flange seat 24 is also provided on the base 21. The flange seat 24 is located above the base 21 and is a universal part for connecting with the robotic arm 33. The corresponding claw disk of the robotic arm 33 can be fitted and connected with the flange seat 24, thereby stably driving the entire compressor port correction device 20 to perform multi-axis motion.

[0049] In addition, the device is equipped with a vision sensor 22, which is connected to the base 21 via a bracket or integrated structure. Its installation position is calibrated so that the head of its lens faces the same working direction as the correction cone 12 of the correction rod 10, ensuring that the vision sensor 22 can acquire image information in front of the correction rod 10 before the robotic arm 33 moves. The vision sensor 22 includes an industrial camera and a coaxial or ring light source, used to capture images of the compressor 40 nozzle 41 area before operation, identify the center coordinates of the nozzle 41 through image processing algorithms, and feed the position information back to the robotic arm 33 control system in real time, thereby guiding the correction rod 10 to achieve high-precision centering insertion.

[0050] In one extended embodiment, multiple calibration rods 10 can be configured to correspond to intake and exhaust pipes of different diameters, and can be arranged in coordination with a dual-camera vision system to achieve simultaneous calibration and detection of the dual pipe openings 41.

[0051] The integrated design of the vision sensor 22 and the detachable calibration bar 10 significantly improves work efficiency and automation level, making it suitable for flexible manufacturing scenarios involving mixed production lines of multiple compressor models 40.

[0052] In one embodiment, the compressor nozzle alignment device 20 further includes at least one quick-release clamping mechanism 23, which is disposed between the alignment rod 10 and the base 21, and the alignment rod 10 is detachably mounted on the quick-release clamping mechanism 23.

[0053] The compressor nozzle alignment device 20 also includes at least one quick-release clamping mechanism 23, which is disposed between the alignment rod 10 and the base 21 to enable quick installation and removal of the alignment rod 10. Specifically, the quick-release clamping mechanism 23 includes a clamp body fixed to the base 21 and a snap-fit ​​or clamping structure that cooperates with the rod body 11 of the alignment rod 10, such as a quick-change clamp with a quick-adjusting screw or an elastic clamping sleeve. When the alignment rod 10 needs to be installed, its rod body 11 is inserted into the positioning hole of the clamp body, and the alignment rod 10 can be quickly clamped and fixed by rotating the adjusting handle or pushing the locking handle. When replacement or maintenance is required, the opposite operation can be performed to easily release it, enabling quick replacement of the alignment rod 10 with no or few tools.

[0054] This design is particularly suitable for scenarios where multiple models of compressors 40 are produced on the same production line. When products are changed, matching calibration rods 10 can be replaced according to different pipe port 41 specifications without disassembling the entire calibration device or recalibrating the vision system. The accuracy of repeated installation can be guaranteed simply by using the preset positioning reference and quick-release structure.

[0055] In one extended embodiment, the quick-release clamping mechanism 23 may integrate a position sensing element, such as a proximity switch or encoder, to detect whether the calibration rod 10 is installed in place and to feed back the status signal to the central control system, thereby realizing automatic confirmation of the installation status and safety interlock.

[0056] This structure significantly improves the flexibility and maintainability of the equipment, reduces changeover time and operational complexity, and enhances the adaptability and operational efficiency of the calibration device in actual production environments.

[0057] The present invention also discloses a compressor nozzle calibration device, including the compressor nozzle calibration device 20 as described above, and further including: a flow table 31 for transporting and carrying the compressor 40 for nozzle 41 calibration; a clamping device 32 disposed adjacent to the flow table, the clamping device 32 being used to fix the compressor 40 located on the flow table 31; a robotic arm 33 disposed above the flow table 31, the compressor nozzle calibration device 20 being disposed at one end of the robotic arm 33 near the flow table 31, the robotic arm 33 driving the compressor nozzle calibration device 20 to calibrate the nozzle 41 of the compressor 40 located on the flow table 31; a pneumatic gauge connected to the compressor nozzle calibration device 20 via a pipeline; and a central control device 34 communicatively connected to the flow table 31, the clamping device 32, the robotic arm 33, and the pneumatic gauge.

[0058] The compressor port calibration equipment of the present invention is used to perform efficient and accurate calibration and inspection of the intake port 41 and exhaust port 41 of compressor 40 on an automated production line. The equipment includes the compressor port calibration device 20 as described in the above embodiment. The device is mounted on the end of the robotic arm 33 via its base 21 and has visual positioning and multi-functional calibration capabilities.

[0059] The compressor nozzle calibration equipment also includes a flow table 31, which serves as a conveyor for transporting the compressor 40 to be processed along the production line to the calibration station. A clamping device 32 is provided on one side of the flow table 31. The clamping device 32 is equipped with retractable grippers or positioning pins. When the compressor 40 reaches the designated station, the clamping device 32 is activated to firmly fix the compressor 40 body on the tray, preventing the workpiece from shifting or vibrating due to reaction force during the insertion and calibration of the calibration rod 10.

[0060] The robotic arm 33 is set above the assembly line 31, and its base 21 is fixed to the ground or equipment support. Through multi-axis linkage, the compressor port correction device 20 at the end can be precisely controlled to move in three-dimensional space to complete the centering, insertion, correction and detection of the double ports 41 of the compressor 40.

[0061] The pneumatic gauge is connected to the airflow channel 15 inside the calibration rod 10 via a flexible air guide tube. It is used to provide stable compressed air and collect airflow parameters in real time to quantitatively determine whether the inner diameter of the nozzle 41 after calibration is qualified.

[0062] The central control device 34 serves as the control core of the system. It communicates with the conveying control system of the assembly line 31, the drive module of the clamping device 32, the controller of the robotic arm 33, and the pneumatic gauge through an industrial bus or I / O interface. It is responsible for coordinating the action sequence of each component, processing the feedback data from the vision sensor 22 and the pneumatic gauge, and judging the detection results according to the preset logic.

[0063] This equipment automates the entire process from workpiece conveying, positioning and clamping, automatic calibration, numerical detection to result judgment, significantly improving production cycle time and quality control.

[0064] The present invention also discloses a compressor nozzle calibration method, which is applied to the compressor nozzle calibration equipment described above, the method comprising: S110. The compressor to be processed is transported to the processing position via the assembly line, and the position of the compressor is fixed by the clamping device 32. S120. Acquire image information of the compressor's inlet using a vision sensor; S130. Based on the image information, the position information of each of the pipe openings 41 is calculated using a preset image processing algorithm and transmitted to the robotic arm; S140. The correction rod is inserted into the pipe opening by the mechanical arm to perform pipe opening correction. S150. After the pipe end is calibrated, compressed air is introduced into the calibration rod, and the working parameters of the compressed air are monitored by a pneumatic gauge and compared with the preset qualified range. S161. When the working parameters are within the preset qualified range, the product is determined to be qualified. S162. When the working parameters are outside the preset qualified range, the product is judged as unqualified and an alarm is triggered to prompt the on-site operator to handle the unqualified product. S170. The correction rod is pulled away from the pipe opening by the robotic arm, the clamping device 32 releases the compressor, and the assembly line transports the compressor to the next workstation.

[0065] The compressor port calibration method provided by this invention is used in the compressor port calibration equipment described above. It aims to achieve fully automatic calibration and objective detection of the suction and discharge ports 41 of the compressor 40, overcoming the technical drawbacks of traditional manual operation, such as low efficiency and high risk of misjudgment and missed judgment.

[0066] This method uses a central control device 34 to uniformly schedule and control the entire calibration process in a closed loop, ensuring coordinated operation of all execution units and forming an efficient and reliable intelligent production process. The specific implementation method is as follows: First, the compressor 40 to be processed is transported from the upstream process to the calibration station by the assembly line 31. When the compressor 40 reaches the preset processing position, the assembly line 31 stops operating or enters the precision positioning mode to ensure that the workpiece position is accurate.

[0067] Subsequently, the clamping device 32 is activated, with its grippers or positioning mechanism extending from the side or bottom to clamp and position the compressor 40 body. This prevents the equipment from shaking or shifting due to mechanical vibration or insertion reaction force during the calibration process, thus ensuring the accuracy of subsequent calibration and testing actions. After the clamping action is completed, the system enters the visual positioning stage.

[0068] The vision sensor 22 on the compressor port alignment device 20, mounted at the end of the robotic arm 33, is activated, and its built-in light source illuminates, providing uniform illumination for image capture. The industrial camera then acquires images of the suction and exhaust port 41 areas at the front of the compressor 40. The acquired image data is transmitted in real time to the central control device 34. Through preset image processing algorithms, such as edge detection, center fitting, and template matching, the center coordinates, axis angles, and spatial posture information of each port 41 are accurately calculated. After coordinate system transformation, this positional information is sent to the motion control system of the robotic arm 33, providing spatial navigation for subsequent precise insertion.

[0069] According to the received coordinate commands, the robotic arm 33 drives the compressor nozzle alignment device 20 at its end to move smoothly along the planned path, aligning the guide cone 121 of the alignment rod 10 with the center of the nozzle 41, and slowly inserting it at a constant speed. During insertion, the expansion and correction part 122 of the alignment rod 10 physically corrects any slight narrowing or deformation of the nozzle 41, restoring its designed inner diameter. After insertion, the robotic arm 33 maintains a stable position, and the system enters the detection phase.

[0070] The central control device 34 controls the pneumatic gauge to introduce compressed air at a set pressure into the airflow channel 15 inside the calibration rod 10. The airflow exits from multiple air outlets 131 of the pipe diameter detection section 13 through the airflow channel 15, forming a stable air gap with the inner wall of the pipe opening 41. The pneumatic gauge monitors the pressure or flow rate of the airflow in real time and feeds this operating parameter back to the central control device 34. The central control device 34 compares the measured parameter with a preset acceptable range, which is calibrated based on the theoretical aerodynamic characteristics of a standard pipe diameter.

[0071] If the operating parameters are within the acceptable range, the calibration of the port 41 is deemed acceptable, and the central control device 34 issues a reset command.

[0072] When the working parameters fed back by the pneumatic gauge exceed the preset acceptable range, the system determines the product to be defective. The central control device 34 immediately triggers an audible and visual alarm, such as illuminating a red warning light or displaying an alarm message on the human-machine interface. Simultaneously, the operation of the assembly line 31 is stopped to prevent defective products from flowing into the next process. At this time, the system can record the workpiece's serial number, inspection data, and timestamp, and generate an anomaly report. On-site operators can intervene based on the alarm prompts, isolating, re-inspecting, or reworking the defective product.

[0073] After each actuator receives a reset command, the robotic arm 33 drives the calibration rod 10 to be pulled out smoothly, the clamping device 32 is released, the assembly line 31 restarts, and the qualified compressor 40 is transported to the next station to complete a complete calibration process.

[0074] This method achieves fully closed-loop automated control of "conveying, clamping, positioning, correction, detection, judgment, and circulation", which significantly improves production cycle time and quality consistency.

[0075] In an advanced implementation, an automatic sorting mechanism can also be configured at the lower end of the compressor nozzle calibration equipment's production line station to separate qualified and unqualified products into different channels based on the judgment results, further improving the intelligence level of the production line.

[0076] This method supports mixed-line production of multiple product models. The central control device 34 can automatically call the corresponding visual recognition template, robotic arm 33 motion trajectory, pneumatic detection parameter threshold and clamping force setting according to the product model, so as to realize flexible production management.

[0077] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A calibration bar, characterized in that, include: The rod body has an airflow channel inside, which is used to connect to the pneumatic gauge and allow pressurized airflow to pass through; A calibration cone is located at one end of the rod and is used to calibrate the inner diameter of the end pipe opening; A pipe diameter detection unit is provided on the rod body. The pipe diameter detection unit has multiple air outlets along the periphery of the rod body. The air outlets are connected to the airflow channel and are used to eject pressurized airflow. The pipe diameter detection unit also includes an air outlet guide groove, which is located near the air outlet and is used to guide the airflow ejected from the air outlet. The air outlet guide groove includes a first annular groove and a second elongated groove. The first annular groove is arranged around the air outlet along the air outlet direction and is recessed inward along the peripheral wall of the calibration rod. The second elongated groove connects to the end of the first annular groove away from the calibration cone and extends inward away from the calibration cone. The second elongated groove is recessed inward along the peripheral wall of the calibration rod.

2. The calibration rod according to claim 1, characterized in that, The pipe diameter detection unit also includes a jet guiding recess, which is located at the connection between the peripheral sidewall of the rod and the first annular groove. A plurality of jet guiding recesses are evenly distributed around the air outlet as the center.

3. The calibration rod according to claim 1, characterized in that, It also includes an air diffuser groove connected to the second long groove, the air diffuser groove being located on the side of the pipe diameter detection section away from the calibration cone.

4. The calibration rod according to claim 1, characterized in that, The correction cone includes a guide cone and an expansion correction part. The guide cone is located at the end of the rod body, and the expansion correction part is located on the side of the guide cone close to the pipe diameter detection part. An included angle is provided between the circumferential side of the guide cone and the circumferential side of the expansion correction part.

5. A compressor nozzle alignment device, characterized in that, include: Base, used to connect the robotic arm; At least one correction rod as described in any one of claims 1 to 4 is disposed on the base; A vision sensor, connected to the base, is used to acquire image information of the working area of ​​the calibration bar; The head of the vision sensor and the calibration cone are positioned in the same direction.

6. The compressor pipe alignment device according to claim 5, characterized in that, It also includes at least one quick-release clamping mechanism, which is disposed between the calibration rod and the base, and the calibration rod is detachably mounted on the quick-release clamping mechanism.

7. A compressor nozzle calibration device, characterized in that, Including the compressor nozzle alignment device as described in claim 5 or 6, further comprising: Assembly line, used for transporting and carrying compressors for pipe fitting; A clamping device is disposed adjacent to the assembly line workbench, and the clamping device is used to fix the compressor located on the assembly line workbench; A robotic arm is positioned above the assembly line workbench, and a compressor nozzle correction device is located at one end of the robotic arm near the assembly line workbench. The robotic arm drives the compressor nozzle correction device to perform nozzle correction on the compressor located on the assembly line workbench. A pneumatic measuring instrument is connected to the pipeline of the compressor port calibration device; The central control device is communicatively connected to the assembly line, the clamping device, the robotic arm, and the pneumatic measuring instrument.

8. A method for calibrating compressor nozzles, characterized in that, The method, applied to the compressor nozzle calibration device as described in claim 7, comprises: The compressor to be processed is transported to the processing position through an assembly line, and the position of the compressor is fixed by a clamping device; Image information of the compressor's inlet is acquired using a visual sensor; Based on the image information, the position information of each of the pipe openings is calculated using a preset image processing algorithm and transmitted to the robotic arm; The correction rod is inserted into the tube opening by the robotic arm to perform tube opening correction; After the nozzle calibration is completed, compressed air is introduced into the calibration rod, and the working parameters of the compressed air are monitored by a pneumatic gauge and compared with the preset qualified range. When the operating parameters are within the preset acceptable range, the product is determined to be qualified. The robotic arm drives the correction rod to pull it away from the pipe opening, the clamping device releases the compressor, and the assembly line transports the compressor to the next workstation.

9. The compressor nozzle calibration method according to claim 8, characterized in that, The method further includes: If the operating parameters are outside the preset acceptable range, the product is determined to be defective, and an alarm is triggered to prompt the on-site operator to handle the defective product.

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