A flywheel sensor hole inspection process and device

Abstract

The invention discloses a flywheel sensor hole inspection process, and the setting steps include: inputting parameter setting values ​​such as the angle, height, and depth of the flywheel sensor hole into a PLC industrial computer, storing the waveform generated by the flywheel sensor hole that meets the requirements in the PLC industrial computer; placing the flywheel on a fixture, setting the reference surface B of the flywheel downward, and inserting the positioning pin into the positioning hole of the flywheel to fix the flywheel on the fixture; controlling the distance between the signal collection sensor and the outer edge of the flywheel to be set to 1±0.5mm; in order to prevent the sensor from being hit during loading and unloading; then entering the drilling step to perform drilling; and in the detection step, comparing the detected information with the angle, height, and depth setting values. During the processing of the flywheel sensor hole, the sensor simulates an ECU to realize the detection of the angle, height, sand holes, shrinkage, and bumps of the sensor hole, so as to avoid sending faulty parts to the whole machine factory and reduce quality loss.

Description

Technical Field

[0001] The present invention belongs to the technical field of internal combustion engines, and in particular, relates to a flywheel sensor hole inspection process and device. Background Art

[0002] When the diesel engine is working, the (58) sensor holes on the largest outer circle of the flywheel will generate a pulse signal through the sensor fixed on the flywheel housing. The ECU (engine central processing unit) collects the signal and determines the position of the crankshaft. It controls the electronic fuel injection system to send working instructions to the corresponding fuel injectors to realize the diesel engine's fuel supply and work.

[0003] When the sensor holes on the outer circle of the flywheel have an angle that is out of tolerance, an axial height that is out of tolerance, or the outer circle has defects such as bumps or sand holes, the sensor will mistakenly identify it as a useful signal, affecting the normal fuel supply timing of the engine, causing the engine power to fail to meet the design indicators, that is, the horsepower size does not meet the standard.

[0004] In the process of realizing the present invention, the inventors found that the prior art has at least the following deficiencies: the current common practice is to assemble the flywheel onto the engine for a test run, and compare and analyze the test results with the engine design indicators to determine whether the sensor holes on the outer circle of the flywheel meet the requirements, which results in low production efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a flywheel sensor hole inspection process and device, which overcomes the defects of the prior art. After adopting the flywheel sensor hole inspection process and device of the present invention, it is possible to avoid flywheel faulty parts being sent to the whole machine factory, affecting engine performance and causing horsepower not to meet the standard.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a flywheel sensor hole inspection process, characterized in that it includes a setting step, a drilling step and a detection step;

[0007] The setting steps include: inputting the angle, height, and depth parameter setting values ​​of the flywheel sensor hole into the PLC industrial computer, and storing the waveform generated by the flywheel sensor hole that meets the requirements in the PLC industrial computer;

[0008] Place the flywheel on the fixture, with the reference surface B of the flywheel set downward, and insert the positioning pin into the positioning hole of the flywheel to fix the flywheel on the fixture;

[0009] The distance between the control signal collection sensor and the outer edge of the flywheel is set to 1±0.5mm; in order to prevent the sensor from being hit during loading and unloading;

[0010] Then enter the drilling step to perform drilling;

[0011] In the detection step, the detected angle, height and depth parameters are compared with the angle, height and depth setting values.

[0012] Further, the drilling step includes:

[0013] Control the rotary table to rotate and place the flywheel at the starting point;

[0014] The drilling device is controlled to start drilling the first flywheel sensor hole. After completion, the drilling device is controlled to reset. The rotary table rotates according to the size of the angle. The drilling device starts drilling the second flywheel sensor hole, and then all the set flywheel sensor holes are completed in sequence.

[0015] Furthermore, the detection step includes:

[0016] Control the rotary table to rotate at a constant speed;

[0017] The signal collection sensor detects each flywheel sensor hole, and the electrical signals generated by its angle, height and depth are encoded by the absolute encoder and transmitted to the PLC industrial computer and its waveform is displayed on the display screen;

[0018] When defects such as bumps appear on the outer circle of the flywheel, the signal collection sensor transmits its electrical signal as the flywheel sensor hole. The PLC industrial computer compares it with the angle, height and depth setting values. If there is any inconsistency, different waveforms are displayed on the display screen and the sound and light alarms are controlled to prompt inspection.

[0019] Furthermore, the rotation speed of the rotary table is 2r / min.

[0020] Based on the above process, a device for implementing the flywheel sensor hole inspection process is provided, and the device is a sensor hole processing device;

[0021] The sensor hole processing device includes a base, a rotary worktable is provided on the base, a fixture for fixing the flywheel is provided on the rotary worktable, a drilling device for processing the sensor hole, a PLC industrial computer and a display screen are provided on the base, a detection device is provided on the rotary worktable, a signal collection sensor is provided on the detection device, the signal collection sensor is connected to an absolute value encoder, and the signal collection sensor is electrically connected to the absolute value encoder, the PLC industrial computer and the display screen.

[0022] Furthermore, the signal collection sensor is height-adjustable up and down, and has an adjustable radial distance.

[0023] Furthermore, the signal collection sensor is a Hall sensor 8400SH-8.

[0024] The present invention adopts the above technical solution, and has the following advantages compared with the prior art: during the processing of the flywheel sensor hole, the sensor simulates the ECU to realize the detection of the angle, height, sand holes, shrinkage and bump of the sensor hole, thereby avoiding the failure of parts from being sent to the whole machine factory and reducing quality loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 , Attachment Figure 2 is a schematic structural diagram of a sensor hole processing device according to an embodiment of the present invention;

[0026] Attached Figure 3 is a schematic diagram of the structure of a flywheel in an embodiment of the present invention;

[0027] Attached Figure 4 Yes Figure 3 Sectional view along AA direction;

[0028] In the figure,

[0029] 1-base, 2-rotating table, 3-flywheel, 4-fixture, 5-drilling device, 6-PLC industrial computer, 7-signal collection sensor, 8-flywheel sensor hole, 9-positioning hole. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation modes of the present invention are now described with reference to the accompanying drawings. Those skilled in the art should understand that the following does not constitute a limitation on the protection scope of the present invention.

[0031] Examples, such as Figure 1-4 As shown, a flywheel sensor hole inspection process, the device for implementing the process is a sensor hole processing device, the sensor hole processing device includes a base 1, a rotary table 2 is provided on the base 1, a fixture 4 for fixing the flywheel 3 is provided on the rotary table 2, a drilling device 5 for processing the sensor hole, a PLC industrial computer 6 and a display screen are provided on the base 1, a detection device is provided on the rotary table 2, a signal collection sensor 7 is provided on the detection device, the signal collection sensor 7 is a Hall sensor 8400SH-8, the signal collection sensor 7 is connected to an absolute value encoder, the detection device can control the signal collection sensor 7 to adjust the up and down height and radial distance to meet the use of flywheel products with different outer diameters, and also to prevent the sensor from being bumped during loading and unloading, the height reference of the signal collection sensor 7 is the upper surface of the fixture 4; the signal collection sensor 7 is electrically connected to the absolute value encoder, the PLC industrial computer 6 and the display screen, and the judgment result is output to the operator through the display screen and the sound and light warning light in a simple and easy-to-understand manner, so as to achieve the purpose of sensor hole inspection.

[0032] The position of the flywheel 3 when the positioning pin on the clamp 4 is aligned with the drill bit of the drilling device 5 is used as the starting point position.

[0033] The above devices all adopt conventional general equipment, so their structures will not be described in detail here.

[0034] The implementation steps of the 100-test process are as follows:

[0035] The included angle of the flywheel sensor hole 8 (the central angle corresponding to two adjacent sensor holes), the height (the distance between the flywheel sensor hole 8 and the flywheel reference plane B, that is, the distance between the flywheel sensor hole 8 and the upper surface of the fixture 4), and the depth parameter setting values ​​are input into the PLC industrial computer 6, and the waveform generated by the flywheel sensor hole 8 that meets the requirements in the PLC industrial computer 6 is stored.

[0036] The flywheel 3 is placed on the fixture 4 , with the reference surface B of the flywheel 3 set downward, and the positioning pin is inserted into the positioning hole 9 of the flywheel 3 to fix the flywheel 3 on the fixture 4 .

[0037] The distance between the control signal collection sensor 7 and the outer edge of the flywheel 3 is set to 1±0.5mm to prevent the sensor from being hit during loading and unloading.

[0038] The rotary table 2 is controlled to rotate and the flywheel 3 is placed at the starting point.

[0039] The drilling device 5 is controlled to start drilling the first flywheel sensor hole 8. After completion, the drilling device 5 is controlled to reset, the rotary table 2 rotates according to the size of the angle, the drilling device 5 starts drilling the second flywheel sensor hole, and then all the set flywheel sensor holes are completed in sequence.

[0040] The rotary table 2 is controlled to rotate at a constant speed of 2 r / min. The speed can also be adjusted according to different flywheels. The data is the optimal design combined with the sensor.

[0041] The signal collection sensor 7 detects each flywheel sensor hole, and transmits the electrical signals generated by its angle, height and depth to the PLC industrial computer 6 after encoding with the absolute value encoder, and displays its waveform on the display screen. When defects such as bumps appear on the outer circle of the flywheel 3, the signal collection sensor 7 uses it as a flywheel sensor hole to transmit its electrical signal, and the PLC industrial computer 6 compares it with the set values ​​of the angle, height and depth. When it is judged to be inconsistent, different waveforms are displayed on the display screen and the sound and light alarm is controlled to prompt inspection.

[0042] The flywheel sensor hole can be 100% inspected during the production process, i.e., a 100% inspection process, with high accuracy, and does not need to be assembled on the engine.

[0043] The collection sensor is of the self-generating type and does not require power supply. The sensor outputs a voltage drop when the flywheel rotates.

[0044] Different flywheels have different parameters. The angle, height and depth parameter setting values ​​of the flywheel sensor hole 8 are set according to the specific flywheel.

[0045] The above is an example of the best implementation of the present invention, and the parts not described in detail are common knowledge of ordinary technicians in the field. The protection scope of the present invention shall be based on the content of the claims, and any equivalent transformation based on the technical enlightenment of the present invention is also within the protection scope of the present invention.

Claims

1. A flywheel sensor hole inspection process, It is characterized in that It includes setting steps, drilling steps and testing steps; The setting step comprises: inputting the angle, height and depth parameter setting values ​​of the flywheel sensor hole (8) into the PLC industrial control computer (6), and storing the waveform generated by the flywheel sensor hole (8) that meets the requirements in the PLC industrial control computer (6); The flywheel (3) is placed on the fixture (4), with the reference surface B of the flywheel (3) facing downward, and a positioning pin is inserted into the positioning hole (9) of the flywheel (3) to fix the flywheel (3) on the fixture (4); Controlling the distance between the signal collecting sensor (7) and the outer edge of the flywheel (3); Then enter the drilling step to perform drilling; A detection step, comparing the detected angle, height, and depth parameters with the angle, height, and depth setting values; The drilling steps include: Controlling the rotary table (2) to rotate and placing the flywheel (3) at the starting point; The drilling device (5) is controlled to start drilling the first flywheel sensor hole (8). After completion, the drilling device (5) is controlled to reset, the rotary table (2) rotates according to the size of the included angle, the drilling device (5) starts drilling the second flywheel sensor hole, and then all the set flywheel sensor holes are completed in sequence; The detection steps include: Controlling the rotary table (2) to rotate at a constant speed; The signal collecting sensor (7) detects each flywheel sensor hole, and the electrical signal generated by the angle, height and depth thereof is encoded by an absolute value encoder and transmitted to the PLC industrial control computer (6) and its waveform is displayed on a display screen; When a defect such as a bump appears on the outer circle of the flywheel (3), the signal collecting sensor (7) transmits its electrical signal as a flywheel sensor hole, and the PLC industrial control computer (6) compares it with the angle, height and depth setting values. When it is determined that there is inconsistency, different waveforms are displayed on the display screen and sound and light alarms are controlled to prompt inspection.

2. The flywheel sensor hole inspection process as claimed in claim 1, Features: The rotation speed of the rotary table (2) is 2 r / min.

3. The flywheel sensor hole inspection process as claimed in claim 1, Features: The distance between the signal collection sensor (7) and the outer edge of the flywheel (3) is set to 1±0.5 mm.

4. A device for implementing the inspection process as claimed in claim 1, Features: The device is a sensor hole processing device; The sensor hole processing device comprises a base (1), a rotary table (2) is provided on the base (1), a fixture (4) for fixing a flywheel (3) is provided on the rotary table (2), a drilling device (5) for processing the sensor hole, a PLC industrial computer (6) and a display screen are provided on the base (1), a detection device is provided on the rotary table (2), a signal collection sensor (7) is provided on the detection device, the signal collection sensor (7) is connected to an absolute value encoder, and the signal collection sensor (7) is electrically connected to the absolute value encoder, the PLC industrial computer (6) and the display screen.

5. The device as claimed in claim 4, Features: The signal collection sensor (7) is adjustable in height up and down, and in radial distance.

6. The device as claimed in claim 4, Features: The signal collection sensor (7) is a Hall sensor 8400SH-8.

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