An on-line automatic measuring device for threaded holes and a cylinder block measuring method

Abstract

The present invention discloses an on-line automatic measuring device for threaded holes and a cylinder block measuring method, belonging to the technical field of cylinder blocks. The on-line automatic measuring device for threaded holes includes a transmission mechanism, a lifting and rotating assembly, a measuring module, a measuring tool table and a calibration table. A lifting and rotating assembly is slidably arranged on the transmission mechanism, which can rotate to switch the surface to be detected of the product to be measured facing the manipulator. A clamping mechanism is arranged at the end of the manipulator, enabling the clamping mechanism to move back and forth between the detection area, the measuring tool table and the calibration table; after the clamping mechanism clamps the threaded plug gauge probe on the measuring tool table and then moves to the calibration table, after the calibration of the threaded plug gauge probe, the product to be measured on the lifting and rotating assembly is detected. This not only helps to improve the detection accuracy of the threaded holes but also realizes the on-line automatic measurement of all threaded holes with various postures, multiple detection surfaces and various specifications of the cylinder block, which is beneficial to the batch production of the cylinder block.

Description

Technical Field

[0001] The present invention relates to the technical field of cylinder blocks, and particularly to an on-line automatic measuring device for threaded holes and a cylinder block measuring method. Background Art

[0002] The engine cylinder block is the main body of the engine. It integrates each cylinder and the crankcase, and is the supporting framework for installing pistons, crankshafts, and other parts and accessories. Different specifications of threaded holes are machined on all six faces of the engine cylinder block.

[0003] However, the traditional on-line measurement of threaded holes is mostly manually detected by employees using different types of thread plug gauges to check the thread through and stop and its depth. The detection process is time-consuming and laborious, which seriously reduces the batch production of engine cylinder blocks.

[0004] Therefore, there is an urgent need to provide an on-line automatic measuring device for threaded holes and a cylinder block measuring method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an on-line automatic measuring device for threaded holes and a cylinder block measuring method, which can automatically detect the threaded holes of the cylinder block, improve the detection accuracy, and is beneficial to the batch production of cylinder blocks.

[0006] To achieve the above object, the following technical solutions are provided:

[0007] An on-line automatic measuring device for threaded holes, comprising:

[0008] A transmission mechanism, provided with a loading area and a detection area along the transmission direction;

[0009] A lifting and rotating assembly, slidably arranged on the transmission mechanism and capable of shuttling between the loading area and the detection area;

[0010] A measuring module, including a manipulator and a clamping mechanism arranged at the end of the manipulator;

[0011] A measuring tool table, provided with a first positioning origin and thread plug gauge probes of several specifications;

[0012] A calibration table, provided with a second positioning origin and a thread calibration ring gauge corresponding to the thread plug gauge probe;

[0013] The measuring module is configured to pick up the thread plug gauge probe from the measuring tool table to the calibration table, complete the calibration of the thread plug gauge probe, and then detect the product to be measured on the lifting and rotating assembly.

[0014] As an alternative solution for the on-line automatic measuring device for threaded holes, the lifting and rotating assembly includes a first base plate, a second base plate and a workpiece tray. The bottom of the first base plate is slidably arranged on the transmission mechanism. The second base plate is rotatably arranged on the first base plate. A lifting rod that telescopically moves in the vertical direction relative to the second base plate is arranged on the second base plate, and the workpiece tray is arranged on the lifting rod.

[0015] As an alternative solution for the on-line automatic measuring device for threaded holes, a plurality of pneumatic positioning pins are arranged on the second base plate, and the pneumatic positioning pins are arranged in one-to-one correspondence with the positioning points on the product to be measured.

[0016] As an alternative solution for the on-line automatic measuring device for threaded holes, the clamping mechanism includes a mounting seat, a torque measuring motor and a quick-change chuck that are sequentially arranged on the mounting seat. The quick-change chuck is connected to the output shaft of the torque measuring motor.

[0017] As an alternative solution for the on-line automatic measuring device for threaded holes, the clamping mechanism further includes a laser displacement sensor and a vision camera. The laser displacement sensor is used to detect the depth of the threaded holes of the product to be measured. The vision camera is arranged on the mounting seat and is electrically connected to the robot.

[0018] A cylinder block measuring method, which is applied to the on-line automatic measuring device for threaded holes as described in any one of the above, includes the following steps:

[0019] S1. Place the cylinder block with a two-dimensional code in the first posture on the lifting and rotating assembly;

[0020] S2. The transmission mechanism transports the lifting and rotating assembly from the loading area to the detection area. The lifting and rotating assembly completes the lifting and rotation of the cylinder block. The robot drives the clamping mechanism to complete code scanning, grasping the threaded plug gauge head and calibrating the threaded plug gauge head;

[0021] S3. According to the measurement program, sequentially complete the measurement of the threaded holes on each surface of the cylinder block in the current posture by the current threaded plug gauge head;

[0022] S4. The robot drives the clamping mechanism to move to the measuring tool table to replace the threaded plug gauge head of other specifications. After calibration, continue to loop and execute step S3 until all the threaded holes of the cylinder block in the current posture are measured, and then return the cylinder block to the loading area.

[0023] As an alternative solution for the cylinder block measuring method, it further includes the following steps:

[0024] S5. Place the cylinder block with a two-dimensional code in the second posture on the lifting and rotating assembly, and loop into step S2, step S3, and step S4 until all the threaded holes of the cylinder block in the second posture are measured, and then return the cylinder block to the loading area.

[0025] As an alternative to the cylinder block measurement method, step S1 further includes the following steps:

[0026] S11. Compressed air pushes the pneumatic positioning pin to perform secondary positioning on the cylinder block.

[0027] As an alternative to the cylinder block measurement method, step S2 specifically includes the following steps:

[0028] S21. The vision camera scans the QR code on the cylinder block to obtain the information of the cylinder block to be measured. The detection system selects the measurement program according to the cylinder block information and determines the thread plug gauge probe to be grabbed.

[0029] S22. First, the vision camera marks the first positioning origin on the measuring tool table, then moves to the corresponding thread plug gauge probe according to the relative position, and grabs the thread plug gauge probe through the quick-release chuck.

[0030] S23. Move to the calibration table, mark the second positioning origin on the calibration table, and then move to the corresponding thread calibration ring gauge according to the model of the currently grabbed thread plug gauge probe for calibration. After the calibration is qualified, move to the detection area to prepare for the start of the formal measurement.

[0031] As an alternative to the cylinder block measurement method, in step S3, when measuring each thread hole, the manipulator first moves to the vicinity of the thread hole, and then corrects the positioning through the vision camera.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] For the on-line automatic measuring device for thread holes provided by the present invention, a lifting and rotating assembly is slidably arranged on the transmission mechanism, which can rotate and switch the surface to be detected of the product to be measured facing the manipulator. A clamping mechanism is arranged at the end of the manipulator, so that the clamping mechanism can move back and forth between the detection area, the measuring tool table and the calibration table; after the clamping mechanism grabs the thread plug gauge probe on the measuring tool table, it moves to the calibration table, and after the calibration of the thread plug gauge probe is completed, the product to be measured on the lifting and rotating assembly is detected. This not only helps to improve the detection accuracy of the thread holes, but also realizes the on-line automatic measurement of all the thread holes with various postures, multiple detection surfaces and various specifications of the cylinder block, which is beneficial to the mass production of the cylinder block.

[0034] For the cylinder block measurement method provided by the present invention, the manipulator drives the clamping mechanism to complete the grabbing and calibration of the thread plug gauge probe, which improves the detection accuracy of the thread holes and realizes the on-line automatic measurement of all the thread holes with various postures, six surfaces and various specifications of the cylinder block. Description of the Drawings

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present invention and these drawings.

[0036] Figure 1 It is an assembly schematic diagram of the on-line automatic measuring device for threaded holes in the embodiments of the present invention;

[0037] Figure 2 It is an assembly schematic diagram of the transmission mechanism and the lifting and rotating assembly in the embodiments of the present invention;

[0038] Figure 3 For Figure 2 The partial enlarged view at position A in

[0039] Figure 4 For Figure 2 The partial enlarged view at position B in

[0040] Figure 5 It is a structural schematic diagram of the clamping mechanism in the embodiments of the present invention;

[0041] Figure 6 It is a flowchart of the cylinder block measurement method.

[0042] Reference numerals:

[0043] 1. Transmission mechanism; 2. Lifting and rotating assembly; 3. Measuring module; 4. Measuring tool table; 5. Calibration table; 6. Electric control box;

[0044] 11. Loading area; 12. Detection area; 13. First buffer blocking member;

[0045] 21. First base plate; 211. Driving motor; 212. First blocking portion; 22. Second base plate; 221. Lifting rod; 222. Pneumatic positioning pin; 223. Gear turntable; 23. Workpiece tray;

[0046] 31. Manipulator; 32. Clamping mechanism; 321. Mounting seat; 322. Torque measuring motor; 323. Quick-release chuck; 324. Laser displacement sensor; 325. Vision camera. Detailed implementation manners

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and illustrated herein generally can be arranged and designed in a variety of different configurations.

[0048] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0049] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "plural" is two or more.

[0051] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0053] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0054] Traditionally, the on-line measurement of threaded holes is mostly manually detected by employees using different types of thread plug gauges to check the thread pass and stop and its depth. The detection process is time-consuming and laborious, seriously reducing the mass production of engine blocks.

[0055] In order to automatically detect the threaded holes of the cylinder block, improve the detection accuracy, and facilitate the mass production of the cylinder block, this embodiment provides an on-line automatic measuring device for threaded holes. The following combines Figures 1 to 6 to describe the specific content of this embodiment in detail.

[0056] As Figure 1 shown, the on-line automatic measuring device for threaded holes includes a transmission mechanism 1, a lifting and rotating assembly 2, a measuring module 3, a measuring tool table 4 and a calibration table 5. The transmission mechanism 1 is provided with a loading area 11 and a detection area 12 along the transmission direction. The lifting and rotating assembly 2 is slidably arranged on the transmission mechanism 1 and can travel back and forth between the loading area 11 and the detection area 12. The measuring module 3 includes a manipulator 31 and a clamping mechanism 32 arranged at the end of the manipulator 31. The measuring tool table 4 is provided with a first positioning origin and a plurality of thread plug gauge tips of several specifications. The calibration table 5 is provided with a second positioning origin and a thread calibration ring gauge corresponding to the thread plug gauge tip. The measuring module 3 is configured to clamp the thread plug gauge tip from the measuring tool table 4 to the calibration table 5, and after calibrating the thread plug gauge tip, detect the product to be measured on the lifting and rotating assembly 2. An electric control box 6 is arranged on one side of the calibration table 5, and an alarm is arranged on the top of the box body of the electric control box 6.

[0057] In short, for the on-line automatic measuring device for threaded holes provided by the present invention, a lifting and rotating assembly 2 is slidably arranged on a transmission mechanism 1. Through the lifting and rotating assembly 2, the surface to be detected of a product to be measured can be rotated and switched to face a manipulator 31. A clamping mechanism 32 is arranged at the end of the manipulator 31, enabling the clamping mechanism 32 to move back and forth between a detection area 12, a measuring tool table 4 and a calibration table 5. After the clamping mechanism 32 clamps a threaded plug gauge probe on the measuring tool table 4 and then moves to the calibration table 5, and after the calibration of the threaded plug gauge probe is completed, the product to be measured on the lifting and rotating assembly 2 is detected. This not only helps to improve the detection accuracy of the threaded holes but also realizes the on-line automatic measurement of all the threaded holes in various postures, multiple detection surfaces and various specifications of the cylinder block, which is beneficial to the mass production of the cylinder block.

[0058] Specifically, the lifting and rotating assembly 2 includes a first base plate 21, a second base plate 22 and a workpiece tray 23. The bottom of the first base plate 21 is slidably arranged on the transmission mechanism 1, the second base plate 22 is rotatably arranged on the first base plate 21, a lifting rod 221 that telescopically moves in the vertical direction relative to the second base plate 22 is arranged on the second base plate 22, and the workpiece tray 23 is arranged on the lifting rod 221. Place the cylinder block on the workpiece tray 23. According to the actual use situation, it can be, but not limited to, that the second base plate 22 rotates first and the workpiece tray 23 is lifted later; the workpiece tray 23 is lifted first and the second base plate 22 rotates later; and the second base plate 22 rotates while the workpiece tray 23 is lifted, etc.

[0059] Further, a number of pneumatic positioning pins 222 are arranged on the second base plate 22, and the pneumatic positioning pins 222 are arranged in one-to-one correspondence with the positioning points on the product to be measured. Specifically, the pneumatic positioning pins 222 are communicated with a gas source. When the cylinder block is placed on the workpiece tray 23 and the valve is opened, the pneumatic positioning pins 222 are pushed against the positioning points of the cylinder block.

[0060] Further, a gear turntable 223 is fixedly arranged at the bottom of the second base plate 22, and a driving motor 211 is fixedly arranged on the side wall of the first base plate 21. The driving motor 211 is in transmission connection with the gear turntable 223. The rotation angle of the second base plate 22 is controlled by the driving motor 211.

[0061] Further, as Figure 2 and Figure 4 shown, a number of first blocking parts 212 are arranged at the first end of the first base plate 21, and a first buffer blocking member 13 is arranged at the end of the loading area 11 of the transmission mechanism 1. The first buffer blocking member 13 is arranged in correspondence with the first blocking parts 212. Further, a number of second blocking parts are arranged at the second end of the first base plate 21, and a second buffer blocking member is arranged at the end of the detection area 12 of the transmission mechanism 1. The second buffer blocking member is arranged in correspondence with the second blocking parts, reducing the collision force between the first base plate 21 and the transmission mechanism 1.

[0062] Further, the clamping mechanism 32 includes a mounting base 321, a torque measuring motor 322 and a quick-change chuck 323 sequentially arranged on the mounting base 321. The quick-change chuck 323 is connected to the output shaft of the torque measuring motor 322. Further still, the clamping mechanism 32 further includes a laser displacement sensor 324 and a vision camera 325. The laser displacement sensor 324 is used to detect the depth of the threaded hole of the product to be measured. The vision camera 325 is arranged on the mounting base 321 and is electrically connected to the manipulator 31. Detecting the qualification of the thread by the laser displacement sensor 324 and the torque measuring motor 322 is a conventional technical tool and will not be limited too much here.

[0063] This embodiment also provides a cylinder block measuring method, as Figure 6 shown, applied to the above-mentioned on-line automatic measuring device for threaded holes. The cylinder block measuring method includes the following steps:

[0064] S1. At the beginning, the workpiece tray 23 is located in the loading area 11 of the conveying mechanism 1. The cylinder block with a two-dimensional code is placed on the lifting and rotating assembly 2 in a first posture through the loading and unloading mechanical structure; S11. Compressed air pushes the pneumatic positioning pin 222 to perform secondary positioning on the cylinder block. At the same time, the system can judge the current posture of the cylinder block according to the extended state of the pneumatic positioning pin 222.

[0065] S2. The conveying mechanism 1 conveys the lifting and rotating assembly 2 from the loading area 11 to the detection area 12. The lifting and rotating assembly 2 completes the lifting and rotation of the cylinder block. The manipulator 31 drives the clamping mechanism 32 to complete code scanning, grasping the thread plug gauge head and calibrating the thread plug gauge head; specifically, S21. The vision camera 325 on the measuring module 3 scans the two-dimensional code on the cylinder block to obtain the information of the cylinder block to be measured. The detection system selects a measurement program according to the cylinder block information and determines the thread plug gauge head to be grasped; S22. First, the vision camera 325 marks the first positioning origin on the measuring tool table 4, and then moves to the corresponding thread plug gauge head according to the relative position, and grasps the thread plug gauge head through the quick-change chuck 323; S23. Move to the calibration table 5, mark the second positioning origin on the calibration table 5, and then move to the corresponding thread calibration ring gauge according to the model of the currently grasped thread plug gauge head for calibration. After calibration is qualified, move to the detection area 12 to prepare for formal measurement. Each time the measuring module 3 passes through the measuring tool table 4 and the calibration table 5, a marking operation is required, which improves the positioning and running accuracy of the measuring module 3.

[0066] S3. According to the measurement procedure, sequentially complete the measurement of the threaded holes on each surface of the cylinder block in the current posture by the current thread plug gauge probe; specifically, in step S3, when measuring each threaded hole, the manipulator 31 first moves to the vicinity of the threaded hole, then corrects the positioning through the vision camera 325, and then the thread plug gauge probe is inserted. The initial position of the threaded hole is located according to the probe pressure, and at the same time, the laser displacement sensor 324 records the initial position. The torque measurement motor 322 drives the thread plug gauge probe to screw into the threaded hole to be measured. After the rotation of the torque measurement motor 322 ends, it is judged whether the threaded hole is qualified. When the rotation ends, the laser displacement sensor 324 records the final rotation position. And the depth of the threaded hole is calculated based on the initial rotation position and the final rotation position, and it is judged whether the thread depth is qualified.

[0067] S4. After all the threaded holes corresponding to the current thread plug gauge probe are measured, the manipulator 31 drives the clamping mechanism 32 to move to the measuring tool table 4 to replace the thread plug gauge probe of other specifications. After calibration, continue to execute step S3 in a loop until all the threaded holes of the cylinder block in the current posture are measured, and then the cylinder block is retracted to the loading area 11.

[0068] S5. The cylinder block is grabbed by the loading and unloading mechanical structure at the production site and turned over up and down. Then, the cylinder block with the QR code is placed on the lifting and rotating assembly 2 in the second posture, and steps S2, S3, and S4 are looped until all the threaded holes of the cylinder block in the second posture are measured, and then the cylinder block is retracted to the loading area 11. This improves the detection accuracy of the threaded holes and realizes the online automatic measurement of all the threaded holes with multiple postures, multiple detection surfaces, and multiple specifications of the cylinder block, which is beneficial to the mass production of the cylinder block.

[0069] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An on-line automatic measuring device for threaded holes, characterized in that, Comprising: A transmission mechanism (1) provided with a loading area (11) and an inspection area (12) along the transmission direction; A lifting and rotating assembly (2) slidably arranged on the transmission mechanism (1) and capable of shuttling between the loading area (11) and the inspection area (12); A measuring module (3) including a manipulator (31) and a clamping mechanism (32) arranged at the end of the manipulator (31); A gauge table (4) provided with a first positioning origin and thread plug gauge heads of several specifications; A calibration table (5) provided with a second positioning origin and thread calibration ring gauges corresponding to the thread plug gauge heads; The measuring module (3) is configured to pick up the thread plug gauge head from the gauge table (4) to the calibration table (5), and after calibrating the thread plug gauge head, detect the product to be measured on the lifting and rotating assembly (2); The lifting and rotating assembly (2) includes a first base plate (21), a second base plate (22) and a workpiece tray (23). The bottom of the first base plate (21) is slidably arranged on the transmission mechanism (1), the second base plate (22) is rotatably arranged on the first base plate (21), and a lifting rod (221) that telescopically moves in the vertical direction relative to the second base plate (22) is arranged on the second base plate (22), and the workpiece tray (23) is arranged on the lifting rod (221).

2. The on-line automatic measuring device for threaded holes according to claim 1, characterized in that A plurality of pneumatic positioning pins (222) are arranged on the second base plate (22), and the pneumatic positioning pins (222) are arranged in one-to-one correspondence with the positioning points on the product to be measured.

3. The on-line automatic measuring device for threaded holes according to claim 1, characterized in that, The clamping mechanism (32) includes a mounting seat (321), a torque measuring motor (322) and a quick-change chuck (323) sequentially arranged on the mounting seat (321), and the quick-change chuck (323) is connected to the output shaft of the torque measuring motor (322).

4. The on-line automatic measuring device for threaded holes according to claim 3, characterized in that The clamping mechanism (32) further includes a laser displacement sensor (324) and a vision camera (325). The laser displacement sensor (324) is used to detect the depth of the threaded hole of the product to be measured, and the vision camera (325) is arranged on the mounting seat (321) and electrically connected to the manipulator (31).

5. A cylinder block measurement method, characterized in that, Applied to the on-line automatic measuring device for threaded holes according to any one of claims 1-4, including the following steps: S1. Place the cylinder block with a two-dimensional code in the first posture on the lifting and rotating assembly (2); S2. The transmission mechanism (1) transports the lifting and rotating assembly (2) from the loading area (11) to the inspection area (12). The lifting and rotating assembly (2) completes the lifting and rotation of the cylinder block, and the manipulator (31) drives the clamping mechanism (32) to complete code scanning, grasping the thread plug gauge head and calibrating the thread plug gauge head; S3. According to the measurement program, sequentially complete the measurement of the threaded holes on each surface of the cylinder block in the current posture by the current thread plug gauge head; S4. The manipulator (31) drives the clamping mechanism (32) to move to the gauge table (4) to replace the thread plug gauge heads of other specifications. After calibration, continue to execute step S3 in a loop until all the threaded holes of the cylinder block in the current posture are measured, and then return the cylinder block to the loading area (11).

6. The cylinder block measurement method according to claim 5, characterized in that, It further includes the following steps: S5. Place the cylinder block with the QR code on the lifting and rotating assembly (2) in the second posture, and cycle through steps S2, S3, and S4 until all the threaded holes of the cylinder block in the second posture are measured, and then return the cylinder block to the loading area (11).

7. The cylinder block measurement method according to claim 6, characterized in that, The step S1 further includes the following steps: S11. Compressed air pushes the pneumatic positioning pin (222) to reposition the cylinder block.

8. The cylinder block measurement method according to claim 6, characterized in that, The step S2 specifically includes the following steps: S21. The vision camera (325) scans the QR code on the cylinder block to obtain the information of the cylinder block to be measured. The detection system selects the measurement program according to the cylinder block information and determines the thread plug gauge tip to be grasped. S22. First, the vision camera (325) marks the first positioning origin on the measuring tool table (4), and then moves to the corresponding thread plug gauge tip according to the relative position, and grasps the thread plug gauge tip through the quick-change chuck (323). S23. Move to the calibration table (5), mark the second positioning origin on the calibration table (5), and then move to the corresponding thread calibration ring gauge according to the model of the currently grasped thread plug gauge tip for calibration. After the calibration is qualified, move to the detection area (12) to prepare for the formal measurement.

9. The cylinder block measuring method according to claim 6, wherein, In the step S3, when measuring each threaded hole, the manipulator (31) first moves to the vicinity of the threaded hole, and then corrects the positioning through the vision camera (325).

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