Automatic and integrated ultrahigh pressure oil rail thread detection system

Abstract

The invention relates to an automatic and integrated ultrahigh pressure oil rail thread detection system. The device comprises an equipment table and an index plate which is arranged on the equipment table and driven by a servo motor to rotate, the index plate is provided with a clamp used for fixing an ultrahigh pressure oil rail product to be detected, and a sensor thread detection mechanism and a pipe joint thread detection mechanism are arranged on the equipment table and located near the index plate. The sensor thread detection mechanism and the pipe joint thread detection mechanism can transmit detection results to the PLC touch screen and / or the three-color lamp. According to the invention, automatic positioning, high-precision detection and real-time data recording of sensor threads and pipe joint threads can be realized, and the detection efficiency and reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of ultra-high pressure oil rail testing technology, and in particular to an automated and integrated ultra-high pressure oil rail thread testing system. Background Technology

[0002] The ultra-high pressure fuel rail is a core component of the fuel injection system, and the machining accuracy of its sensor threads and pipe joint threads directly affects the sealing performance and assembly reliability of the fuel rail. Current inspection methods are mostly manual, with inspectors manually screwing threads one by one using a thread gauge. This method suffers from low efficiency, inconsistent accuracy, and susceptibility to missed inspections due to human error. Some semi-automatic inspection equipment can only perform single-type thread inspection and lacks integrated positioning, inspection, and data traceability functions, making it difficult to adapt to the inspection needs of ultra-high pressure fuel rails with multiple specifications and thread positions, and failing to meet the quality control requirements of mass production scenarios. Summary of the Invention

[0003] The purpose of this invention is to provide an automated and integrated ultra-high pressure oil rail thread detection system, which mainly solves the technical problems existing in the prior art. It can realize automatic positioning, high-precision detection, and real-time data recording of sensor threads and pipe joint threads, thereby improving detection efficiency and reliability.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] An automated and integrated ultra-high pressure oil rail thread inspection system is characterized by comprising: an equipment platform, an indexing plate driven by a servo motor and mounted on the equipment platform, the indexing plate being equipped with clamps for fixing the ultra-high pressure oil rail product to be inspected, and a sensor thread inspection mechanism and a pipe joint thread inspection mechanism being mounted on the equipment platform and located near the indexing plate; the sensor thread inspection mechanism and the pipe joint thread inspection mechanism can transmit the inspection results to a PLC touch screen and / or a three-color light.

[0006] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that: the fixture includes an oil rail fixture fixing plate connected to the indexing plate, and a clamping cylinder set on the oil rail fixture fixing plate.

[0007] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that: at least two clamps are provided on the indexing plate.

[0008] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that: the pipe joint thread detection mechanism includes a first tooling fixing plate connected to the equipment platform via a first right tooling support block and a first left tooling support block; a first servo motor fixing plate is connected to the first tooling fixing plate via a first sliding rail; a first sliding cylinder is provided on the first tooling fixing plate; the first sliding cylinder is connected to the first servo motor fixing plate via a first cylinder connecting plate; a first servo drive mechanism is connected to the first servo motor fixing plate; the first servo drive mechanism is connected to the pipe joint thread detection gauge via a pipe joint thread gauge fixing block; and a displacement sensor is included in the first servo drive mechanism.

[0009] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that: the first tooling fixing plate is also provided with a first limiting block that restricts the forward and backward sliding of the first servo motor fixing plate.

[0010] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that: the sensor thread detection mechanism includes a second tooling fixing plate connected to the equipment platform via a second right tooling support block and a second left tooling support block; a second servo motor fixing plate is connected to the second tooling fixing plate via a second sliding rail; a second sliding cylinder is provided on the second tooling fixing plate; the second sliding cylinder is connected to the second servo motor fixing plate via a second cylinder connecting plate; a second servo drive mechanism is connected to the second servo motor fixing plate; the second servo drive mechanism is connected to the second servo motor fixing plate via a detection servo motor fixing block; the second servo drive mechanism is connected to a thread gauge via a connecting rod; and a displacement sensor is included within the second servo drive mechanism.

[0011] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that: the second tooling fixing plate is also provided with a second limiting block to restrict the forward and backward sliding of the second servo motor fixing plate.

[0012] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that: the connecting rod passes through the sensor thread gauge fixing block connected to the second servo motor fixing plate to connect the thread gauge.

[0013] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that: the oil rail clamp fixing plate is also equipped with a sensor, which, together with the sensor thread detection mechanism and the transmitter device set on the pipe joint thread detection mechanism, determines whether the ultra-high pressure oil rail product to be detected has reached the detection position.

[0014] The automated and integrated ultra-high pressure oil rail thread detection system is characterized in that the sensor thread detection mechanism and the pipe joint thread detection mechanism are arranged in a straight line.

[0015] In view of the above technical features, the present invention has the following beneficial effects:

[0016] 1. The system of this invention has a high degree of automation: It integrates multi-station positioning and dual-thread detection modules to realize full-process automation from positioning to detection and data recording, replacing manual detection. The detection time for a single oil rail is ≤1 minute, and the detection efficiency is improved by more than 80%.

[0017] 2. The system of this invention has high detection accuracy: It realizes quantitative detection of thread engagement force, pitch and tooth profile through high-precision servo drive and sensor, avoiding human subjective error, and the detection accuracy can reach ±0.5μm, which greatly improves the reliability of detection.

[0018] 3. The system of this invention has strong versatility: the interchangeable fixture and adjustable detection stroke design can be adapted to the detection of sensor threads and pipe joint threads of different models and specifications of ultra-high pressure oil rails, without the need to purchase additional special equipment, thus reducing the investment cost of enterprises.

[0019] 4. The system data of this invention is traceable: the detection data is stored in association with the oil rail number, supports local query and Ethernet export, which facilitates quality traceability and process optimization in the production process and meets the requirements of industrial quality control. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the system of the present invention.

[0021] Figure 2 This is a schematic diagram of the layout structure of the positioning and detection workstations in the system of this invention.

[0022] Figure 3 yes Figure 2 Front view. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0024] Please see Figure 1-3This invention discloses an automated and integrated ultra-high pressure oil rail thread inspection system. As shown in the figure, it includes a machine platform 2, an indexing plate 18 driven to rotate by a servo motor 25 on the machine platform 2, a clamp 1 for fixing the ultra-high pressure oil rail product 15 to be inspected on the indexing plate 18, a sensor thread inspection mechanism and a pipe joint thread inspection mechanism are arranged on the machine platform 2 and near the indexing plate 18; the sensor thread inspection mechanism and the pipe joint thread inspection mechanism can transmit the inspection results to the PLC touch screen 4 and / or the tri-color light 3.

[0025] In this invention, the indexing plate 18 can rotate 360°, driving the oil rail to switch to different thread detection positions, ensuring accurate alignment of the detection positions. For example, the indexing plate 18 can be a Tanzi DRFH-250-4 with an indexing accuracy of ±30″ and a load capacity of 250kg.

[0026] In this invention, the PLC touch screen 4 can use a Siemens S7-1200 PLC controller and a Weintek MT8102IE 10-inch touch screen with a resolution of 1024×600 to realize human-machine interaction.

[0027] In this invention, the fixture 1 includes an oil rail fixture fixing plate 17 connected to the indexing plate 18, and a clamping cylinder 16 disposed on the oil rail fixture fixing plate 17. Preferably, at least two fixtures 1 are provided on the indexing plate 18. When one fixture 1 moves to the testing station via the indexing plate 18, it ensures that at least one fixture 1 is clamping and positioning another product to be tested, thus improving testing efficiency.

[0028] In this invention, the pipe joint thread detection mechanism includes a first tooling fixing plate 9 connected to the equipment platform 2 via a first right tooling support block 11 and a first left tooling support block 14. A first servo motor fixing plate 8 is connected to the first tooling fixing plate 9 via a first sliding rail. A first sliding cylinder 12 is provided on the first tooling fixing plate 9. The first sliding cylinder 12 is connected to the first servo motor fixing plate 8 via a first cylinder connecting plate 13. A first servo drive mechanism 6 is connected to the first servo motor fixing plate 8. The first servo drive mechanism 6 is connected to a pipe joint thread detection gauge 24 via a pipe joint thread gauge fixing block 5. The first servo drive mechanism 6 contains a displacement sensor.

[0029] The first tooling fixing plate 9 is also provided with a first limiting block 7 that restricts the forward and backward sliding of the first servo motor fixing plate 8.

[0030] The structural advantages of this pipe joint thread detection mechanism in this invention are as follows:

[0031] A. Strong installation stability ensures accurate testing standards.

[0032] Double support + fixed connection, sufficient structural rigidity: The first tooling fixing plate 9 is fixed in both directions by the first right tooling support block 11 and the first left tooling support block 14, ensuring the installation accuracy of the fixing plate on the equipment table 2 and avoiding the reference offset caused by the loosening of the support during the detection process; all subsequent detection-related components (sliding rail, cylinder, servo mechanism, etc.) are built on the fixing plate to form a stable detection frame, laying the structural foundation for high-precision detection.

[0033] B. Precise component connection reduces assembly errors: Each component is connected in a hierarchical manner through a “support block-fixed plate-connecting plate”, with a unified positioning reference. This reduces the cumulative error during component assembly and ensures that the movement trajectory of the pipe joint thread inspection gauge 24 is precisely aligned with the axis of the thread to be inspected, avoiding misjudgment due to offset.

[0034] C. Precise motion control, adapting to the refined requirements of thread inspection.

[0035] Servo drive + sliding rail, high motion precision: The first servo motor fixing plate 8 is connected to the first tooling fixing plate 9 through the first sliding rail. With the drive of the first sliding cylinder 12, the detection mechanism can move smoothly and linearly, ensuring that the detection gauge can accurately approach and align with the pipe joint thread. At the same time, the first servo drive mechanism 6 directly drives the pipe joint thread detection gauge 24 to engage. The high-precision speed and torque control of the servo motor can simulate the real process of thread engagement, avoiding uneven force or engagement angle deviation during manual inspection.

[0036] Built-in displacement sensor enables quantitative detection: The first servo drive mechanism 6 has a built-in displacement sensor that can collect displacement data in real time during the thread engagement process. Combined with the force feedback of the servo motor, it can accurately quantify key parameters such as thread pitch, tooth profile accuracy, and engagement depth, replacing manual subjective judgment (such as "whether the engagement is smooth"). The detection accuracy can reach ±0.5μm, which greatly improves the reliability and consistency of the detection results.

[0037] In this invention, the sensor thread detection mechanism includes a second tooling fixing plate connected to the equipment platform 2 via a second right tooling support block and a second left tooling support block. A second servo motor fixing plate is connected to the second tooling fixing plate via a second sliding rail 22. A second sliding cylinder is provided on the second tooling fixing plate. The second sliding cylinder is connected to the second servo motor fixing plate via a second cylinder connecting plate. A second servo drive mechanism is connected to the second servo motor fixing plate. The second servo drive mechanism is connected to the second servo motor fixing plate via a detection servo motor fixing block 19. The second servo drive mechanism is connected to a thread gauge 26 via a connecting rod 20. The second servo drive mechanism contains a displacement sensor.

[0038] The second tooling fixing plate is also provided with a second limiting block that restricts the forward and backward sliding of the second servo motor fixing plate.

[0039] The connecting rod 20 passes through the sensor thread gauge fixing block 21 connected to the second servo motor fixing plate and connects to the thread gauge 26.

[0040] Similarly, this sensor thread detection mechanism has the same advantages as the aforementioned pipe joint thread detection mechanism, so it will not be described in detail again.

[0041] In this invention, the oil rail clamp fixing plate 17 also has a sensor 23. The sensor 23, in conjunction with the transmitting device on the sensor thread detection mechanism and the pipe joint thread detection mechanism, determines whether the ultra-high pressure oil rail product 15 to be tested has reached the detection position. When it reaches the detection position, the PLC controller controls the sensor thread detection mechanism and the pipe joint thread detection mechanism to perform the corresponding detection operation.

[0042] Preferably, the sensor thread detection mechanism and the pipe fitting thread detection mechanism are arranged in a straight line.

[0043] The workflow of the system of this invention is as follows:

[0044] Loading and positioning: The operator places the ultra-high pressure oil rail product 15 into the front and rear clamps 1 on the indexing plate 18, and uses the clamping cylinder 16 to press the oil rail to ensure stability; the detection program is started through the PLC touch screen 4, the indexing plate 18 rotates to the first thread detection position, the sensor 23 detects that the oil rail is in place, and the positioning is completed.

[0045] Thread inspection:

[0046] Sensor thread detection: The detection execution unit receives a PLC signal, and the second sliding cylinder drives the second cylinder connecting plate to move, so that the thread gauge 26 connected to the sensor thread gauge fixing block 21 is aligned with the sensor thread; the second servo drive mechanism (e.g., servo motor) drives the thread gauge 26 to engage, and the sensor built into the second servo drive mechanism collects the engagement force value in real time. If it is within the preset range, it is judged to be qualified.

[0047] And / or,

[0048] Pipe joint thread inspection: The first servo drive mechanism (e.g., servo motor) moves the pipe joint thread inspection gauge 24 to the pipe joint thread position. The inspection probe is in contact with the thread surface. The sensor built into the first servo drive mechanism collects data. The PLC controller processes the data, calculates the pitch and thread profile accuracy, and compares it with the standard value to determine whether it is qualified or not.

[0049] Station switching: After the first inspection station is completed, the indexing plate 18 rotates according to the preset program, driving the ultra-high pressure oil rail product 15 to switch to the next thread inspection station. The above inspection process is repeated until all thread inspection stations are inspected.

[0050] Data output: The PLC controller of the control and interaction unit records the results and quantitative data of each detection position. The touch screen displays the overall pass / fail conclusion. The detection data is stored in association with the oil rail number. It supports local query and Ethernet export. The detection result is displayed synchronously with the three-color indicator lights to show the equipment operating status and detection conclusion.

[0051] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An automatic, integrated ultrahigh pressure oil rail thread detection system, characterized in that: It includes equipment table (2), the index plate (18) driven by servo motor (25) is arranged on equipment table (2), the index plate (18) is provided with the fixture (1) for fixing the ultrahigh pressure oil rail product (15) to be detected, the sensor thread detection mechanism and the pipe joint thread detection mechanism are arranged on equipment table (2) and are located near the index plate (18), the sensor thread detection mechanism and the pipe joint thread detection mechanism can be transmitted to the detection result on PLC touch screen (4) and / or three color lamp (3).

2. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 1, wherein: The fixture (1) includes an oil rail fixture fixing plate (17) connected to the index plate (18), and a pressing cylinder (16) arranged on the oil rail fixture fixing plate (17).

3. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 2, wherein: The fixture (1) is arranged on the index plate (18) at least two.

4. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 1, wherein: The pipe joint thread detection mechanism includes a first tool fixing plate (9) connected to the equipment table (2) through a first right tool support block (11) and a first left tool support block (14), a first servo motor fixing plate (8) is connected to the first tool fixing plate (9) through a first sliding track, a first sliding cylinder (12) is arranged on the first tool fixing plate (9), the first sliding cylinder (12) is connected to the first servo motor fixing plate (8) through a first cylinder connecting plate (13), a first servo driving mechanism (6) is connected to the first servo motor fixing plate (8), the first servo driving mechanism (6) is connected to a pipe joint thread detection gauge (24) through a pipe joint thread gauge fixing block (5), and a displacement sensor is arranged in the first servo driving mechanism (6).

5. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 4, wherein: A first limiting block (7) is further arranged on the first tool fixing plate (9) to limit the forward and backward sliding of the first servo motor fixing plate (8).

6. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 1, wherein: The sensor thread detection mechanism includes a second tool fixing plate connected to the equipment table (2) through a second right tool support block and a second left tool support block, a second servo motor fixing plate is connected to the second tool fixing plate through a second sliding track (22), a second sliding cylinder is arranged on the second tool fixing plate, the second sliding cylinder is connected to the second servo motor fixing plate through a second cylinder connecting plate, a second servo driving mechanism is connected to the second servo motor fixing plate, the second servo driving mechanism is connected to the second servo motor fixing plate through a detection servo motor fixing block (19), the second servo driving mechanism is connected to a thread gauge (26) through a connecting rod (20), and a displacement sensor is arranged in the second servo driving mechanism.

7. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 6, wherein: A second limiting block is further arranged on the second tool fixing plate to limit the forward and backward sliding of the second servo motor fixing plate.

8. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 6, wherein: The connecting rod (20) passes through a sensor thread gauge fixing block (21) connected to the second servo motor fixing plate to connect the thread gauge (26).

9. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 2, wherein: The oil rail fixture fixing plate (17) further has a sensor (23), and the sensor (23) cooperates with a transmitting device arranged on the sensor thread detection mechanism and the pipe joint thread detection mechanism to determine whether the ultrahigh pressure oil rail product (15) to be detected reaches a detection position.

10. The automated, integrated ultrahigh pressure oil rail thread inspection system of claim 1, wherein: The sensor thread detection mechanism and the pipe joint thread detection mechanism are arranged on a straight line.

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