Detection device capable of automatically identifying repeated machining of new energy external gear piece

Abstract

The invention discloses a detection device capable of automatically identifying repeated processing of a new energy external gear, and relates to the technical field of gear processing detection, the detection device comprises a pressure regulating valve, a pressure sensor, a clamp, a fixed support, a telescopic cylinder and an air tightness detection tool; the pressure regulating valve is externally connected with a compressed air source, and an outlet is communicated with the pressure sensor; the pressure sensor is communicated with the airtightness detection tool through a pipeline and is used for monitoring the leakage rate of airflow; the clamp is installed on the machine tool and used for fixing a detected part. The fixed bracket is fixedly connected with the clamp; the telescopic cylinder is fixedly connected with the fixed support, and the output end of the telescopic cylinder is in transmission connection with the airtightness detection tool. The airtightness detection tool is used for detecting whether the detected part is subjected to secondary processing or not; during detection, the telescopic air cylinder enables the airtightness detection tool to stretch out, the airtightness detection tool fills gas with set pressure into the surface of a part through the pressure regulating valve, and the pressure sensor monitors the gas leakage condition in real time and records leakage rate data for subsequent analysis.

Description

Technical Field

[0001] This invention relates to the field of gear processing and inspection technology, specifically a detection device that can automatically identify repeated processing of external gear parts for new energy vehicles. Background Technology

[0002] In the machining industry, airtightness testing of parts is a crucial step in ensuring product quality and performance. Traditional testing methods rely on manual operation, which is not only inefficient but also susceptible to human error, leading to inaccurate results. With the continuous development of automation technology, airtightness testing devices are increasingly being applied to the inspection of machined parts. However, existing airtightness testing devices still have shortcomings in identifying whether parts require secondary processing, failing to achieve rapid and accurate identification. Therefore, how to accurately identify whether machined parts have undergone secondary processing has become a pressing technical problem that needs to be solved.

[0003] New energy gear parts are extremely sensitive to machining precision; a single rework can lead to scrap. Therefore, there is an urgent need for an automated detection device that can accurately identify rework characteristics and link them to production equipment in real time. Summary of the Invention

[0004] The purpose of this invention is to provide a detection device that can automatically identify repeated processing of external gear components in new energy vehicles, so as to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The detection device includes a pressure regulating valve, a pressure sensor, a fixture, a fixed bracket, a telescopic cylinder, and an airtightness detection fixture; the pressure regulating valve is connected to an external compressed air source, and its outlet is connected to the pressure sensor; the pressure sensor is connected to the airtightness detection fixture through a pipeline to monitor the leakage of airflow; the fixture is mounted on a machine tool to fix the part under test; the fixed bracket is fastened to the fixture; the telescopic cylinder is fastened to the fixed bracket, and the output end of the telescopic cylinder is drivenly connected to the airtightness detection fixture; the airtightness detection fixture is used to detect whether the part under test has undergone secondary processing.

[0006] The detection device of this application is used to detect whether gear parts have been reprocessed. First, the equipment is prepared and calibrated. The airtightness detection fixture is turned on and a self-test is performed. The equipment is calibrated using standard parts, and a reasonable leakage rate threshold is set. Next, the parts to be tested are cleaned to remove oil, dust and other impurities, and correctly installed on the machine tool fixture. Then, when the start button is pressed for processing, the telescopic cylinder extends the airtightness detection fixture. The airtightness detection fixture fills the surface of the parts with gas at a set pressure through the pressure regulating valve. The pressure sensor monitors the gas leakage in real time and records the leakage rate data for subsequent analysis.

[0007] Furthermore, the pressure sensor is connected to a relay, which in turn is connected to an audible and visual alarm light and the machine tool control system.

[0008] The pressure sensor outputs the judgment result to the relay via an electrical signal. If the airtightness test is passed, the relay is activated, the machine tool control system starts, and the machine tool continues to operate for processing. If the airtightness test fails, the relay cannot be activated, the audible and visual alarm lights up, and processing cannot be performed.

[0009] Furthermore, the airtightness testing fixture includes a protective shell, an airtightness component, a curvature detection component, and an adjustment component. The protective shell is connected to the output end of the telescopic cylinder. The airtightness component is located inside the protective shell and is arc-shaped. The airtightness component is used to fit against the surface of the part. The curvature detection component is fastened to the protective shell and is used to detect the curvature of the part. The adjustment component is connected to the airtightness component and can automatically adjust the shape of the airtightness component according to the data detected by the curvature detection component.

[0010] The protective shell protects the airtightness testing fixture. During testing, the protective shell moves to the part being tested, driven by a telescopic cylinder, so that the curved airtight component fits against the surface of the part. At the same time, the curvature detection component on the protective shell also fits against the surface of the part. Since the dimensions of parts from different batches are inconsistent, and the curvature of gear parts of different sizes is also inconsistent, if the curved airtight component cannot fit against the surface of the part, leakage will occur during testing, resulting in inaccurate test results. The curvature detection component is used to detect the curvature of the part before airtightness testing, and the movement of the adjustment component is controlled according to the test results, thereby adjusting the shape of the airtight component so that parts of different sizes can be fitted by the airtight component, thereby improving the accuracy of testing.

[0011] Furthermore, the airtight component includes a connecting pipe, a support plate, and a contact plate. The support plate is connected to the adjustment component and is arc-shaped. The contact plate is connected to the support plate and has an airtight chamber. One end of the connecting pipe is connected to a pressure sensor, and the other end of the connecting pipe is connected to the airtight chamber. The support plate is made of elastic metal material, and the contact plate is made of rubber material.

[0012] Once the airtight component is attached to the surface of the part, the rubber contact plate will adhere to the surface of the part, creating a relatively sealed space between the part and the airtight chamber. Compressed gas is injected into the airtight chamber through the connecting pipe. After the injection is completed, the leakage rate of the airtight chamber can be detected by the pressure sensor connected to the connecting pipe to determine whether the part has been processed a second time. The support plate made of elastic metal material can deform and also provide a certain support for the contact plate.

[0013] Furthermore, a pressing chamber is provided between the contact plate and the support plate, and an expansion pipe is provided inside the pressing chamber. The expansion pipe is connected to a compressed air source and abuts against the inner wall of the contact plate. A through groove is provided on the side of the support plate away from the contact plate, and a locking groove is opened around the support plate, and the contact plate is engaged with the locking groove.

[0014] To ensure that the airtight chamber can be pressed tightly against the surface of the part, a pressing chamber is set on the contact plate. When the contact plate is in contact with the surface of the part, air is injected into the expansion tube, which expands under pressure and pressurizes the tube, thus pressing it tightly against the inner wall of the pressing chamber. This makes the contact plate and the part fit more tightly and prevents leakage. The vertical through groove facilitates the deformation of the support plate, thereby ensuring the fit effect. The slot is used to provide the installation position for the contact plate.

[0015] Furthermore, the curvature detection component includes a fixed base, a movable probe, and a support spring. The fixed base is fastened to the protective shell. The fixed base has several movable slots. The movable probe is slidably connected to the movable slots. A piezoresistor is provided at the bottom of the movable probe. One end of the support spring is fastened to the inner wall of the movable slot, and the other end is fastened to the detection end of the piezoresistor.

[0016] Several movable probes are arranged in the movable slot, and the movable probes form an arc-shaped detection array.

[0017] The mounting base is used to fix the curvature detection component to the protective shell. Since the gear part is circular, the larger the gear size, the smaller the curvature. When the protective shell is moved to the side of the part, the movable probe extending from the movable slot will be moved by the part, causing the movable probe to move along the movable slot and compress the support spring, so that the varistor fixed at the bottom of the movable probe is subjected to a certain pressure. Several movable probes form a detection array. The movable probe located in the middle of the mounting base is pressed into the part by a fixed distance, and the pressure on the varistor at this point is also fixed. The distance that the movable probes on both sides are pressed into the part depends on the size of the part. The larger the size of the part, the smaller the curvature. That is, the larger the size of the part, the longer the movable probes on both sides are pressed into the part, and the greater the pressure on the varistor at the corresponding position. By detecting the pressure difference between the varistor at the middle position and the varistor on both sides, the size of the part can be determined. The greater the pressure difference between the middle and the sides, the greater the curvature of the part and the smaller its size.

[0018] Furthermore, the adjustment assembly includes a hinge seat and a pneumatic rod. The hinge seat is fastened to the protective shell, and the pneumatic rod is symmetrically arranged at both ends of the airtight assembly. One end of the pneumatic rod is hinged to the hinge seat, and the other end of the pneumatic rod is hinged to the support plate.

[0019] When the curvature detection component detects a change in the curvature of the part, it synchronously controls the adjustment component to move. The smaller the size of the part, the longer the pneumatic rod extends, making the curvature of the arc-shaped support plate larger, thus fitting it to the surface of the part. In other words, it realizes the automatic adjustment of the curvature of the airtight component according to the size of the part, thereby ensuring the fitting effect.

[0020] Furthermore, the machine tool control system is used to control the start and stop of the machine tool based on relay signals; the audible and visual alarm lights are used to sound an alarm when leakage exceeds the standard.

[0021] Furthermore, the pressure sensor compares the leakage rate data with a preset threshold. If the threshold is exceeded, it is determined that the part has been processed, and the machine tool is stopped and an alarm is triggered by a relay. The leakage rate is set by standard part calibration, and the threshold range is the maximum allowable leakage amount, which is used to distinguish between processed and unprocessed parts.

[0022] Compared with the prior art, the beneficial effects of the present invention are: 1. This device improves the accuracy of detecting whether gears have undergone secondary processing through the synergistic effect of curvature adaptive sealing technology and dynamic clamping structure. On one hand, the curvature detection component measures the gear dimensions in real time through an array of moving probes, and accurately calculates the curvature of the part by combining the pressure difference feedback from the pressure-sensitive resistor. The adjustment component then drives the pneumatic rod to automatically adjust the arc of the airtight component, ensuring that the sealing surface formed by the elastic metal support plate and the rubber contact plate perfectly fits gears of different sizes, eliminating leakage errors caused by batch differences in parts. On the other hand, the unique clamping chamber design injects air into the expansion tube after sealing contact, causing it to expand and compress the contact plate, forming a secondary reinforced seal and significantly improving the boundary leak-proof capability.

[0023] 2. The detection device is integrated into the machine tool system, realizing fully automated closed-loop control, significantly improving production efficiency and quality stability. The detection process is seamlessly embedded in the machining process; the telescopic cylinder drives the airtightness detection fixture to quickly take position; the pressure sensor compares the leakage rate with the preset threshold in real time, and the result directly links to the machine tool control system through a relay. If the leakage exceeds the standard (determined to have been processed), an audible and visual alarm is immediately triggered and the machine stops to prevent unqualified parts from flowing into subsequent processes; this improves the accuracy and reliability of quality inspection of machined parts, avoiding quality problems caused by secondary processing; optimizes the machining production process, improving production efficiency and product quality; reduces quality inspection costs, and improves the company's economic benefits. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the detection process of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the airtightness testing fixture of the present invention; Figure 4 This is a partial cross-sectional view of the airtightness testing fixture; Figure 5 for Figure 4 Enlarged view of a portion at point A; Figure 6 This is a partial cross-sectional view of the curvature detection component; Figure 7 This is a schematic diagram of the curvature detection component. Figure 8 This is a schematic diagram of the adjustment component.

[0025] In the diagram: 1. Pressure regulating valve; 2. Pressure sensor; 3. Fixture; 4. Fixed bracket; 5. Telescopic cylinder; 6. Airtightness testing fixture; 7. Relay; 8. Audible and visual alarm light; 9. Machine tool control system; 61. Protective shell; 62. Airtight component; 621. Connecting pipe; 622. Support plate; 6221. Through slot; 6222. Slot; 623. Contact plate; 6231. Airtight chamber; 6232. Pressing chamber; 624. Expansion tube; 63. Curvature detection component; 631. Fixed seat; 6311. Movable slot; 632. Movable probe; 633. Support spring; 634. Pressure-sensitive resistor; 64. Adjustment component; 641. Hinge seat; 642. Pneumatic rod. Detailed Implementation

[0026] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example: Figures 1-8 As shown, this invention provides a technical solution for a detection device that can automatically identify repeated processing of external gear parts in new energy vehicles. The detection device includes a pressure regulating valve 1, a pressure sensor 2, a clamp 3, a fixed bracket 4, a telescopic cylinder 5, and an airtightness detection fixture 6. The pressure regulating valve 1 is connected to an external compressed air source, and its outlet is connected to the pressure sensor 2. The pressure sensor 2 is connected to the airtightness detection fixture 6 through a pipeline to monitor the leakage of airflow. The clamp 3 is installed on a machine tool to fix the part under test. The fixed bracket 4 is fastened to the clamp 3. The telescopic cylinder 5 is fastened to the fixed bracket 4, and the output end of the telescopic cylinder 5 is connected to the airtightness detection fixture 6 for transmission. The airtightness detection fixture 6 is used to detect whether the part under test has undergone secondary processing.

[0028] The detection device of this application is used to detect whether gear parts have been reprocessed. First, the equipment is prepared and calibrated. The airtightness detection fixture 6 is turned on and a self-test is performed. The equipment is calibrated using standard parts and a reasonable leakage rate threshold is set. Next, the parts to be tested are cleaned to remove oil, dust and other impurities, and correctly installed on the machine tool fixture 3. Then, when the start button is pressed for processing, the telescopic cylinder 5 extends the airtightness detection fixture 6. The airtightness detection fixture 6 is filled with gas at a set pressure through the pressure regulating valve 1. The pressure sensor 2 monitors the gas leakage in real time and records the leakage rate data for subsequent analysis.

[0029] Pressure sensor 2 is connected to relay 7, and relay 7 is connected to audible and visual alarm light 8 and machine tool control system 9.

[0030] Pressure sensor 2 outputs the judgment result to relay 7 via an electrical signal. If the airtightness test is passed, relay 7 is activated, machine tool control system 9 is started, and machine tool operation continues. If the airtightness test fails, relay 7 cannot be activated, audible and visual alarm light 8 sounds, and processing cannot be performed.

[0031] The airtightness testing fixture 6 includes a protective shell 61, an airtightness component 62, a curvature detection component 63, and an adjustment component 64. The protective shell 61 is connected to the output end of the telescopic cylinder 5. The airtightness component 62 is located inside the protective shell 61 and is arc-shaped. The airtightness component 62 is used to fit against the surface of the part. The curvature detection component 63 is fastened to the protective shell 61 and is used to detect the curvature of the part. The adjustment component 64 is connected to the airtightness component 62 and can automatically adjust the shape of the airtightness component 62 according to the data detected by the curvature detection component 63.

[0032] The protective shell 61 is used to protect the airtightness testing fixture 6. During testing, driven by the telescopic cylinder 5, the protective shell 61 moves to the part being tested, so that the arc-shaped airtight component 62 fits against the surface of the part. At the same time, the curvature detection component 63 located on the protective shell 61 also fits against the surface of the part. Since the dimensions of parts from different batches are inconsistent, and the curvature of gear parts of different sizes is also inconsistent, if the arc-shaped airtight component 62 cannot fit against the surface of the part, leakage will occur during testing, resulting in inaccurate test results. The curvature detection component 63 is used to detect the curvature of the part before airtightness testing, and controls the action of the adjustment component 64 based on the test results, thereby adjusting the shape of the airtight component 62 so that parts of different sizes can be fitted by the airtight component 62, thereby improving the accuracy of testing.

[0033] The airtight component 62 includes a connecting pipe 621, a support plate 622, and a contact plate 623. The support plate 622 is connected to the adjustment component 64 and is arc-shaped. The contact plate 623 is connected to the support plate 622 and has an airtight chamber 6231. One end of the connecting pipe 621 is connected to the pressure sensor 2, and the other end of the connecting pipe 621 is connected to the airtight chamber 6231. The support plate 622 is made of elastic metal material, and the contact plate 623 is made of rubber material.

[0034] After the airtight component 62 is attached to the surface of the part, the rubber contact plate 623 will also be attached to the surface of the part, so that a relatively sealed space is formed between the part and the airtight chamber 6231. Compressed gas is injected into the airtight chamber 6231 through the connecting pipe 621. After the gas injection is completed, the leakage rate of the airtight chamber 6231 can be detected by the pressure sensor 2 connected to the connecting pipe 621 to determine whether the part has been processed again. The support plate 622, made of elastic metal material, can deform and also provide a certain support for the contact plate 623.

[0035] A pressing chamber 6232 is provided between the contact plate 623 and the support plate 622. An expansion pipe 624 is provided inside the pressing chamber 6232. The expansion pipe 624 is connected to a compressed air source and abuts against the inner wall of the contact plate 623. A through groove 6221 is provided on the side of the support plate 622 away from the contact plate 623. A retaining groove 6222 is opened around the support plate 622, and the contact plate 623 is engaged with the retaining groove 6222.

[0036] To ensure that the airtight chamber 6231 can be pressed tightly against the surface of the part, a pressing chamber 6232 is provided on the contact plate 623. When the contact plate 623 is in contact with the surface of the part, air is injected into the expansion tube 624, and the expansion tube 624 is pressurized and expanded, thus pressing tightly against the inner wall of the pressing chamber 6232, making the contact plate 623 and the part fit more tightly, thereby preventing leakage. The vertical through groove 6221 facilitates the deformation of the support plate 622, thereby ensuring the fitting effect. The slot 6222 is used to provide an installation position for the contact plate 623.

[0037] The curvature detection assembly 63 includes a fixed base 631, a movable probe 632, and a support spring 633. The fixed base 631 is fastened to the protective shell 61. The fixed base 631 is provided with a plurality of movable grooves 6311. The movable probe 632 is slidably connected to the movable grooves 6311. A piezoresistive resistor 634 is provided at the bottom of the movable probe 632. One end of the support spring 633 is fastened to the inner wall of the movable groove 6311, and the other end is fastened to the detection end of the piezoresistive resistor 634.

[0038] Several movable probes 632 are provided in the movable slot 6311, and the movable probes 632 form an arc-shaped detection array.

[0039] The mounting base 631 is used to fix the curvature detection component 63 onto the protective shell 61. Since the gear part is circular, the larger the gear size, the smaller the curvature. When the protective shell 61 is moved to the side of the part, the movable probe 632 extending from the movable slot 6311 will be moved by the part, causing the movable probe 632 to move along the movable slot 6311 and compress the support spring 633, so that the piezoresistor 634 fixed at the bottom of the movable probe 632 is subjected to a certain pressure. Several movable probes 632 form a detection array, with the movable probe 632 located in the middle of the mounting base 631. 2. The distance the component is pressed in is constant, and the pressure on the varistor 634 is constant. However, the distance the movable probes 632 on both sides are pressed in is related to the size of the component. The larger the component, the smaller its curvature. That is, the larger the component, the longer the distance the movable probes 632 on both sides are pressed in, and the greater the pressure on the varistor 634 at the corresponding position. By detecting the pressure difference between the varistor 634 in the middle position and the varistor 634 on both sides, the size of the component can be determined. The greater the pressure difference between the middle and the sides, the greater the curvature of the component and the smaller its size.

[0040] The adjustment assembly 64 includes a hinge seat 641 and a pneumatic rod 642. The hinge seat 641 is fastened to the protective shell 61. The pneumatic rod 642 is symmetrically arranged at both ends of the airtight assembly 62. One end of the pneumatic rod 642 is hinged to the hinge seat 641, and the other end of the pneumatic rod 642 is hinged to the support plate 622.

[0041] When the curvature detection component 63 detects a change in the curvature of the part, it synchronously controls the adjustment component 64 to move. The smaller the size of the part, the longer the pneumatic rod 642 extends, which increases the curvature of the arc-shaped support plate 622, thus fitting it to the surface of the part. In other words, the curvature of the airtight component 62 is automatically adjusted according to the size of the part to ensure the fitting effect.

[0042] The machine tool control system 9 is used to control the start and stop of the machine tool according to the signal of the relay 7; the audible and visual alarm light 8 is used to alarm when the leakage exceeds the standard.

[0043] Pressure sensor 2 compares the leakage rate data with a preset threshold. If the threshold is exceeded, it is determined that the part has been processed, and the machine tool is stopped and an alarm is triggered by relay 7. The leakage rate is set by standard part calibration, and the threshold range is the maximum allowable leakage amount, which is used to distinguish between processed and unprocessed parts.

[0044] The working principle of this invention is as follows: First, the equipment is prepared and calibrated. The airtightness testing fixture 6 is turned on for a self-test, and the equipment is calibrated using standard parts to set a reasonable leakage rate threshold. Next, the part to be tested is cleaned to remove oil, dust, and other impurities, and correctly installed on the machine tool fixture 3. Then, when the start button is pressed for processing, the testing device pushes the airtightness testing fixture 6 against the gear surface through the telescopic cylinder 5. The curvature detection component 63 measures the gear size in real time, and the linkage adjustment component 64 automatically adjusts the curvature of the airtight component 62 to ensure that it fits tightly against the part surface, ensuring the accuracy of the test. During testing, the pressure regulating valve 1 injects gas at a set pressure into the airtight chamber 6231 of the contact plate 623 through a pipeline, and the leakage rate is continuously monitored by the pressure sensor 2. If the leakage rate exceeds the preset threshold, it indicates that the part has been processed a second time. The relay 7 is disconnected, triggering the audible and visual alarm 8 and forcing the machine tool to stop. If the leakage rate does not exceed the threshold, the machine tool processes normally. This achieves automated and high-precision online determination of whether the gear has been processed a second time.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A detection device capable of automatically identifying repeated machining of external gear components in new energy vehicles, characterized in that: The detection device includes a pressure regulating valve (1), a pressure sensor (2), a clamp (3), a fixed bracket (4), a telescopic cylinder (5), and an airtightness detection fixture (6); the pressure regulating valve (1) is connected to an external compressed air source, and its outlet is connected to the pressure sensor (2); the pressure sensor (2) is connected to the airtightness detection fixture (6) through a pipeline to monitor the leakage of airflow; the clamp (3) is installed on a machine tool to fix the part to be tested; the fixed bracket (4) is fastened to the clamp (3); the telescopic cylinder (5) is fastened to the fixed bracket (4), and the output end of the telescopic cylinder (5) is connected to the airtightness detection fixture (6) for transmission; the airtightness detection fixture (6) is used to detect whether the part to be tested has undergone secondary processing.

2. The detection device for automatically identifying repeated machining of external gear components in new energy vehicles according to claim 1, characterized in that: The pressure sensor (2) is connected to a relay (7), and the relay (7) is connected to an audible and visual alarm light (8) and a machine tool control system (9).

3. The detection device for automatically identifying repeated machining of new energy external gear parts according to claim 1, characterized in that: The airtightness testing fixture (6) includes a protective shell (61), an airtight component (62), a curvature detection component (63), and an adjustment component (64). The protective shell (61) is connected to the output end of the telescopic cylinder (5). The airtight component (62) is located inside the protective shell (61) and is arc-shaped. The airtight component (62) is used to fit onto the surface of the part. The curvature detection component (63) is fastened to the protective shell (61) and is used to detect the curvature of the part. The adjustment component (64) is connected to the airtight component (62) and can automatically adjust the shape of the airtight component (62) according to the data detected by the curvature detection component (63).

4. The detection device for automatically identifying repeated machining of new energy external gear parts according to claim 3, characterized in that: The airtight component (62) includes a connecting pipe (621), a support plate (622), and a contact plate (623). The support plate (622) is connected to the adjustment component (64) and is arc-shaped. The contact plate (623) is connected to the support plate (622) and has an airtight chamber (6231). One end of the connecting pipe (621) is connected to the pressure sensor (2), and the other end of the connecting pipe (621) is connected to the airtight chamber (6231). The support plate (622) is made of elastic metal material, and the contact plate (623) is made of rubber material.

5. The detection device for automatically identifying repeated machining of new energy external gear parts according to claim 4, characterized in that: A pressing chamber (6232) is provided between the contact plate (623) and the support plate (622). An expansion tube (624) is provided inside the pressing chamber (6232). The expansion tube (624) is connected to a compressed air source and abuts against the inner wall of the contact plate (623). A through groove (6221) is provided on the side of the support plate (622) away from the contact plate (623). A slot (6222) is provided around the support plate (622). The contact plate (623) is engaged with the slot (6222).

6. The detection device for automatically identifying repeated machining of new energy external gear parts according to claim 5, characterized in that: The curvature detection component (63) includes a fixed base (631), a movable probe (632), and a support spring (633). The fixed base (631) is fastened to the protective shell (61). The fixed base (631) is provided with a plurality of movable slots (6311). The movable probe (632) is slidably connected to the movable slots (6311). A piezoresistive resistor (634) is provided at the bottom of the movable probe (632). One end of the support spring (633) is fastened to the inner wall of the movable slot (6311), and the other end is fastened to the detection end of the piezoresistive resistor (634).

7. The detection device for automatically identifying repeated machining of new energy external gear parts according to claim 6, characterized in that: The movable probes (632) are provided in a plurality of movable slots (6311), and the plurality of movable probes (632) form an arc-shaped detection array.

8. The detection device for automatically identifying repeated machining of new energy external gear parts according to claim 7, characterized in that: The adjustment assembly (64) includes a hinge seat (641) and a pneumatic rod (642). The hinge seat (641) is fastened to the protective shell (61). The pneumatic rod (642) is symmetrically arranged at both ends of the airtight assembly (62). One end of the pneumatic rod (642) is hinged to the hinge seat (641), and the other end of the pneumatic rod (642) is hinged to the support plate (622).

9. The detection device for automatically identifying repeated machining of new energy external gear parts according to claim 2, characterized in that: The machine tool control system (9) is used to control the start and stop of the machine tool according to the relay (7) signal; the audible and visual alarm light (8) is used to alarm when the leakage exceeds the standard.

10. The detection device for automatically identifying repeated machining of new energy external gear parts according to claim 2, characterized in that: The pressure sensor (2) compares the leakage rate data with a preset threshold. If the threshold is exceeded, it is determined that the part has been processed, and the machine tool is stopped and alarmed by the relay (7). The leakage rate is set by standard part calibration, and the threshold range is the maximum allowable leakage amount, which is used to distinguish between processed parts and unprocessed parts.

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