Aperture and Groove Depth Detection Device and Detection Method

Abstract

The present invention relates to a device for detecting the aperture and groove depth, comprising: a cylinder body having an inner cavity with at least an upper opening; a fixed column which is slidably engaged with the inner cavity up and down, and a first ventilation cavity is formed between the bottom of the fixed column and the bottom surface of the inner cavity of the cylinder body, such that the size of the channel for realizing the first ventilation cavity is associated with the depth of the groove to be detected of the workpiece to be detected; a second ventilation cavity is provided in the middle of the fixed column, and a ventilation channel communicating with the second ventilation cavity is provided inside the detection column. An air outlet channel is formed between the periphery of the outlet of the ventilation channel and the inner wall of the hole to be detected of the workpiece to be detected. The size of the air outlet channel is associated with the aperture of the hole to be detected of the workpiece to be detected. The larger the aperture of the hole to be detected of the workpiece to be detected, the larger the air outlet channel; conversely, the smaller it is. The present invention has the characteristics that it can synchronously detect the hole to be detected and the groove to be detected of the workpiece to be detected, effectively avoid the increase of detection steps, and improve the detection efficiency, etc.

Description

Technical Field

[0001] The present invention specifically relates to an aperture and groove depth detection device and a detection method. Background Art

[0002] A pneumoelectric measuring instrument can be used to measure the aperture or groove depth. However, most of the existing devices cooperating with the pneumoelectric measuring instrument can only achieve single detection of the aperture or groove depth, and cannot simultaneously detect the aperture and groove depth.

[0003] For example, the Chinese utility model patent with the publication number CN211717343U discloses an aperture size and perpendicularity pneumatic measuring device, including: a bottom plate, a workbench, and a probe. A central hole is provided at the center of the workbench; the probe is perpendicular to the workbench, and an inner diameter measuring nozzle and a perpendicularity measuring nozzle are provided inside the probe. Both the inner diameter measuring nozzle and the perpendicularity measuring nozzle include two gas paths arranged along the radial direction of the probe. Among them, the two gas paths of the inner diameter measuring nozzle are at the same height, and the two gas paths for perpendicularity measurement are at different heights; the joint is connected to the inner diameter measuring nozzle and the perpendicularity measuring nozzle.

[0004] This device can only detect the aperture size and cannot realize the detection of the groove depth of the workpiece to be detected.

[0005] However, during the production process, for some workpieces (such as motor end covers), after processing, it is necessary to detect both the aperture and groove depth on the workpiece. The prior art cannot simultaneously detect the aperture and groove depth, and can only be carried out in batches, resulting in more processes, longer detection time, and lower detection efficiency. Summary of the Invention

[0006] The purpose of the present invention is to provide an aperture and groove depth detection device and a detection method, which solve the problems existing in the prior art that the groove depth and aperture of the workpiece to be detected cannot be detected simultaneously, and the detection efficiency is low.

[0007] The above technical object of the present invention is mainly solved by the following technical solution: An aperture and groove depth detection device, including:

[0008] A cylinder body, the cylinder body has an inner cavity, and the inner cavity is at least open at the upper end;

[0009] A fixed column which is slidably fitted up and down in the inner cavity. A first ventilation cavity is formed between the bottom of the fixed column and the bottom surface of the inner cavity of the cylinder body, and a compression spring for jacking up the fixed column is arranged between the bottom of the fixed column and the bottom surface of the inner cavity. A second intake pipe communicating with the first ventilation cavity is provided at the bottom of the cylinder body, and an air outlet of the ventilation cavity communicating with the first ventilation cavity is provided on the side wall of the cylinder body. An annular support portion is provided at the upper end of the fixed column, and the upper end of the annular support portion is used to abut against the bottom of the detection groove of the workpiece to be detected. The channel size of the first ventilation cavity is associated with the axial position of the fixed column in the inner cavity, and thus the channel size of the first ventilation cavity is associated with the depth of the detection groove of the workpiece to be detected;

[0010] A second ventilation cavity is provided in the middle of the fixed column. A first intake pipe communicating with the second ventilation cavity is provided on the side wall of the fixed column. A through hole for the first intake pipe to pass through is provided on the side wall of the cylinder body, and the dimension of the through hole in the height direction is larger than the outer diameter of the first intake pipe;

[0011] A detection column which is arranged at the top of the second ventilation cavity of the fixed column and is airtightly fitted with the second ventilation cavity. The outer wall of the detection column is coaxial with the inner wall of the annular support portion. A ventilation channel communicating with the second ventilation cavity is provided inside the detection column. The outlet of the ventilation channel is located on the side wall of the detection column. An air outlet channel is formed between the periphery of the outlet of the ventilation channel and the inner wall of the detection hole of the workpiece to be detected. The size of the air outlet channel is associated with the aperture of the detection hole of the workpiece to be detected. The larger the aperture of the detection hole of the workpiece to be detected, the larger the air outlet channel; the smaller the aperture of the detection hole of the workpiece to be detected, the smaller the air outlet channel;

[0012] An air-electric measuring instrument which is respectively communicated with the first intake pipe and the second intake pipe through pipelines, and the air-electric measuring instrument is used to measure the aperture of the detection hole and the depth of the detection groove of the workpiece to be detected;

[0013] The above-mentioned cylinder body supports and fixes the entire device, enabling the fixed column to slide up and down within the inner cavity to match the depth change of the to-be-detected groove of the workpiece to be detected. Thus, through the movement of the fixed column and the change in the size of the first ventilation cavity, the depth change of the to-be-detected groove of the workpiece to be detected is associated to achieve the detection of the depth of the to-be-detected groove of the workpiece to be detected. The setting of the detection column enables, after the workpiece to be detected is assembled, the size of the air outlet channel to be associated with the aperture of the to-be-detected hole of the workpiece to be detected through the ventilation channel on the detection column, thereby detecting the aperture of the to-be-detected hole of the workpiece to be detected. Subsequently, the device can synchronously detect the to-be-detected hole and the to-be-detected groove of the workpiece to be detected, effectively avoiding the increase in detection steps and improving the detection efficiency. The above-mentioned compression spring can support the up-and-down sliding of the fixed column, enabling the fixed column to remain floating before the workpiece to be detected is assembled to provide a sliding space after the workpiece to be detected is assembled. The dimension of the through hole in the height direction is greater than the outer diameter of the first air inlet pipe, enabling the first air inlet pipe to move synchronously within the through hole when the fixed column slides up and down and maintaining the air supply work of the first air inlet pipe to ensure that the to-be-detected hole and the to-be-detected groove of the workpiece to be detected can be detected synchronously. The outer wall of the above-mentioned detection column is coaxially arranged with the inner wall of the annular support portion, enabling, when the workpiece to be detected is assembled, the gap between the inner wall of the to-be-detected hole of the workpiece to be detected and the outer wall of the detection column to be consistent everywhere, avoiding uneven gap sizes from affecting the uniformity of ventilation and ensuring the detection accuracy.

[0014] Preferably, a cover body that closes the inner cavity is provided at the bottom end of the cylinder body. An air inlet hole connected to the second air inlet pipe is provided in the middle of the cover body. A sealing block is provided at a position near the air inlet hole at the bottom end of the second ventilation cavity. The setting of the above-mentioned cover body facilitates the assembly of the air inlet hole and the sealing block. The air inlet hole can be communicated with the second air inlet pipe, and the second air inlet pipe can transport gas between the air inlet hole and the sealing block, and ensure the airtightness at the bottom of the second ventilation cavity.

[0015] Preferably, an annular groove is provided on the side wall of the fixed column near the cover body. A limiting convex portion is provided on the side wall of the annular groove. The compression spring is located between the end face of the annular groove and the end face of the cover body and below the limiting convex portion. The setting of the above-mentioned compression spring can limit the initial position of the fixed column through the limiting convex portion, enabling the bottom end of the fixed column to be separated from the end face of the cover body. Thus, after the workpiece to be detected is assembled, the depth of the to-be-detected groove of the workpiece to be detected presses down the fixed column, causing the size of the first ventilation cavity to change, so as to facilitate the detection of the depth of the to-be-detected groove of the workpiece to be detected.

[0016] Preferably, the air outlet of the ventilation cavity is arranged on one side of the annular groove, and a limit pin extending into the air outlet of the ventilation cavity is arranged on the side wall of the annular groove; the cooperation of the limit column and the air outlet of the ventilation cavity enables the air outlet of the ventilation cavity to limit the upper and lower limits of the sliding of the fixed column, avoiding excessive movement of the fixed column and affecting the detection accuracy.

[0017] Preferably, on the end face of the cover body facing the inner cavity, a first annular air groove is arranged on the periphery of the air inlet hole outlet, and a first air guide groove crossing the end face of the cover body is arranged on one side of the first annular air groove; the settings of the first annular air groove and the first air guide groove are convenient for maintaining the guiding of the air outlet of the air inlet hole and ensuring the stability of the air outlet of the air inlet hole, and the setting of the first air guide groove is to increase the exhaust effect of the gas, avoiding the influence of the small or large exhaust space on the detection accuracy of the detection hole of the workpiece to be detected.

[0018] Preferably, the ventilation channel includes a first air duct arranged along the axis of the detection column and a plurality of second air ducts perpendicular to the first air duct and arranged radially; the settings of the first air duct and the second air ducts enable the gas to be dispersed from the first air duct into the second air ducts, maintaining the uniformity of the gas distribution in each second air duct and improving the detection accuracy of the detection hole of the workpiece to be detected.

[0019] Preferably, a second annular air groove is arranged on the periphery of the side wall of the detection column corresponding to the outlet of the ventilation channel, and a second air guide groove communicating with the outside is arranged on the side of the second annular air groove; the settings of the second annular air groove and the second air guide groove can increase the guiding effect on the gas, improve the gas flow efficiency, increase the detection accuracy of the detection hole of the workpiece to be detected, and avoid the influence of the small or large exhaust space on the detection accuracy of the detection hole of the workpiece to be detected.

[0020] The detection method of the detection device includes:

[0021] S1: Set the detection position where the pneumoelectric measuring instrument is connected to the first air inlet pipe as aperture detection and input the aperture measurement value and tolerance range, and set the detection position where the pneumoelectric measuring instrument is connected to the second air inlet pipe as groove depth detection and input the groove depth detection value and tolerance range;

[0022] S2: Calibrate the standard aperture with the lower tolerance limit and the standard groove depth with the lower tolerance limit of the standard part for the detection position of the pneumoelectric measuring instrument, and calibrate the standard aperture with the upper tolerance limit and the standard groove depth with the upper tolerance limit of the standard part for the detection position of the pneumoelectric measuring instrument;

[0023] S3: Assemble the workpiece to be detected onto the detection device, such that the inner hole to be detected of the workpiece to be detected mates with the detection post, and the slot to be detected of the workpiece to be detected mates with the annular support portion;

[0024] S4: Start the pneumoelectric measuring instrument to respectively detect the aperture diameter and slot depth of the workpiece to be detected;

[0025] With the above - set detection method, the hole to be detected and the slot to be detected of the workpiece to be detected can be simultaneously subjected to quality detection by the pneumoelectric measuring instrument, effectively reducing the operation steps and improving the detection efficiency of the workpiece.

[0026] Therefore, the present invention has the characteristics that it can simultaneously detect the hole to be detected and the slot to be detected of the workpiece to be detected, effectively avoiding the increase of detection steps and improving the detection efficiency. Description of the Drawings

[0027] Figure 1 is the three - dimensional structure diagram of the present invention;

[0028] Figure 2 is Figure 1 the structural sectional view of the mating with the front end cover of the motor;

[0029] Figure 3 is Figure 1 the structural schematic diagram of the detection post in

[0030] Figure 4 is Figure 1 the structural schematic diagram of the cover body in Detailed Embodiment

[0031] The technical solution of the present invention will be further specifically described below through embodiments in combination with the drawings.

[0032] As Figure 1-3 shown, a device for detecting aperture diameter and slot depth includes:

[0033] A cylinder body 1, the cylinder body 1 has an inner cavity 11, and the inner cavity 11 is at least open at the upper end;

[0034] Fixing column 2, the fixing column 2 is slidably fitted up and down inside the inner cavity 11. A first ventilation cavity 21 is formed between the bottom of the fixing column 2 and the bottom surface of the inner cavity 11 of the cylinder body 1, and a compression spring 22 for jacking up the fixing column 2 is arranged between the bottom of the fixing column 2 and the bottom surface of the inner cavity 11. A second intake pipe 12 communicating with the first ventilation cavity 21 is provided at the bottom of the cylinder body 1, and a ventilation cavity air outlet 211 communicating with the first ventilation cavity 21 is provided on the side wall of the cylinder body 1. An annular support portion 23 is provided at the upper end of the fixing column 2, and the upper end of the annular support portion 23 is used to abut against the bottom of the detection groove of the workpiece 10 to be detected. The channel size of the first ventilation cavity 21 is associated with the axial position of the fixing column 2 inside the inner cavity 11, and then the channel size of the first ventilation cavity 21 is associated with the depth of the detection groove of the workpiece 10 to be detected;

[0035] A second ventilation cavity 24 is provided in the middle of the fixing column 2. A first intake pipe 241 communicating with the second ventilation cavity 24 is provided on the side wall of the fixing column 2. A through hole 14 for the first intake pipe 241 to pass through is provided on the side wall of the cylinder body 1, and the dimension of the through hole 14 in the height direction is larger than the outer diameter of the first intake pipe 241;

[0036] Detection column 3, the detection column 3 is arranged at the top of the second ventilation cavity 24 of the fixing column 2 and is hermetically fitted with the second ventilation cavity 24. The outer wall of the detection column 3 is coaxial with the inner wall of the annular support portion 23. A ventilation channel 31 communicating with the second ventilation cavity 24 is provided inside the detection column 3. The outlet 311 of the ventilation channel 31 is located on the side wall of the detection column 3. An air outlet channel 32 is formed between the periphery of the outlet 311 of the ventilation channel 31 and the inner wall of the detection hole of the workpiece 10 to be detected. The size of the air outlet channel 32 is associated with the aperture of the detection hole of the workpiece to be detected. The larger the aperture of the detection hole of the workpiece to be detected, the larger the air outlet channel 32; the smaller the aperture of the detection hole of the workpiece to be detected, the smaller the air outlet channel 32;

[0037] An air-electric measuring instrument is respectively communicated with the first intake pipe 241 and the second intake pipe 12 through pipelines, and the air-electric measuring instrument is used to measure the aperture of the detection hole and the depth of the detection groove of the workpiece 10 to be detected.

[0038] When the workpiece to be detected is assembled, the detection groove of the workpiece to be detected is sleeved on the top end of the annular support portion, the inner wall of the detection hole of the workpiece to be detected is close to the air outlet of the ventilation channel on the outer wall of the detection column, the outer wall of the detection hole of the workpiece to be detected abuts against the inner wall of the annular support portion, and the first intake pipe and the second intake pipe are respectively communicated with the respective pipelines on the air-electric measuring instrument.

[0039] After the workpiece to be detected is assembled, the gas output by the pneumoelectric measuring instrument enters the second ventilation cavity through the first intake pipe, and then enters the ventilation channel from the second ventilation cavity. The gas is discharged from the outlet of the ventilation channel. At this time, the pneumoelectric measuring instrument can convert the gas signal into an electric signal and directly display the inner diameter value of the hole to be detected on the pneumoelectric measuring instrument. At the same time, the gas synchronously output by the pneumoelectric measuring instrument enters the first ventilation cavity through the second intake pipe. The fixed column is pressed down by the workpiece to be detected and moves downward as a whole, causing the fixed column to slide downward, thereby reducing the size of the first ventilation cavity. At this time, the pneumoelectric measuring instrument can convert the gas signal into an electric signal and directly display the depth value of the groove to be detected on the pneumoelectric measuring instrument.

[0040] As Figure 2-4 shown, a cover body 4 that closes the inner cavity 11 is provided at the bottom end of the cylinder body 1. An air inlet hole 41 connected to the second intake pipe 12 is provided in the middle of the cover body 4. A sealing block 242 is provided at the bottom end of the second ventilation cavity 24 near the air inlet hole 31. An annular groove 25 is provided on the side wall of the fixed column 2 near the cover body 4. A limiting convex portion 251 is provided on the side wall of the annular groove 25. The compression spring 22 is located between the end face of the annular groove 25 and the end face of the cover body 4 and below the limiting convex portion 251. The air outlet 211 of the ventilation cavity is provided on one side of the annular groove 25. A limiting pin 252 extending into the air outlet 211 of the ventilation cavity is provided on the side wall of the annular groove 25. On the end face of the cover body 4 facing the inner cavity 11, a first annular air groove 42 is provided on the periphery of the outlet of the air inlet hole 41. A first air guide groove 43 that penetrates the end face of the cover body 4 is provided on one side of the first annular air groove 42. The ventilation channel 31 includes a first air channel 312 arranged along the axis of the detection column 3 and a plurality of second air channels 313 that are perpendicular to the first air channel 312 and radially arranged. A second annular air groove 314 is provided on the side wall of the detection column 3 on the periphery corresponding to the outlet 311 of the ventilation channel 31. A second air guide groove 315 communicating with the outside is provided on the side of the second annular air groove 314.

[0041] The above-mentioned limiting pin is detachably connected to the side wall of the fixed column. The above-mentioned cover body is connected to the end face of the cylinder body and closes the inner cavity. When the workpiece to be detected is not assembled on the top of the annular support portion, the compression spring acts to make the fixed column float as a whole. When the workpiece to be detected is assembled on the top of the annular support portion, the workpiece to be detected acts on the fixed column to slide downward, causing the fixed column to move closer to the cover body as a whole, and the compression spring contracts at this time. The limiting pin moves in the air outlet of the ventilation cavity. After the first intake pipe and the second intake pipe start to intake air, the gas from the first intake pipe enters the air outlet channel from the second ventilation cavity and gradually discharges along the first annular air groove and the first air guide groove, while the gas from the second intake pipe flows from the air inlet hole into the first ventilation cavity and gradually discharges along the second annular air groove and the second air guide groove.

[0042] As Figure 2As shown in the figure, the workpiece 10 to be detected is a motor end cover. It is necessary to detect the aperture of the inner hole 101 and the groove depth of the groove 102 that is coaxial with the inner hole 101 and located outside the inner hole 101. The aperture requirement of the inner hole 101 is 16 mm, and the tolerance range is (0, 0.05); the groove depth requirement of the groove 102 is 1.5 mm, and the tolerance range is ±0.05.

[0043] The detection methods for the aperture of the inner hole 101 and the groove depth of the groove 102 are as follows:

[0044] S1: Set the detection position where the pneumoelectric measuring instrument is connected to the first intake pipe as the aperture detection and input the aperture measurement value of 16 mm and the tolerance range (0, 0.05). Set the detection position where the pneumoelectric measuring instrument is connected to the second intake pipe as the groove depth detection and input the groove depth detection value of 1.5 mm and the tolerance range of ±0.05 mm;

[0045] S2: Calibrate the standard aperture with a lower tolerance limit value of 16 and the standard groove depth with a lower tolerance limit value of 1.45 for the detection position of the pneumoelectric measuring instrument using a standard part. Calibrate the standard aperture with an upper tolerance limit value of 16.05 and the standard groove depth with an upper tolerance limit value of 1.55 for the detection position of the pneumoelectric measuring instrument using a standard part;

[0046] S3: Assemble the workpiece to be detected onto the detection device. The inner hole to be detected of the workpiece to be detected is fitted with the detection column, and the groove to be detected of the workpiece to be detected is fitted with the annular support part;

[0047] S4: Start the pneumoelectric measuring instrument to detect the aperture and groove depth of the workpiece 10 to be detected respectively.

[0048] If the measured value of the aperture of the inner hole 101 is between 16 - 16.05 mm, then the aperture of the inner hole 101 meets the requirements; otherwise, the aperture of the inner hole 101 does not meet the requirements. If the measured value of the groove depth of the groove 102 is between 1.45 mm - 1.55 mm, then the groove depth of the groove 102 meets the requirements; otherwise, the groove depth of the groove 102 does not meet the requirements.

Claims

1. An aperture and groove depth detection device, comprising: A cylinder body (1) having an inner cavity (11), and the inner cavity (11) is at least open at the upper end; A fixed column (2) slidably fitted up and down in the inner cavity (11). A first ventilation cavity (21) is formed between the bottom of the fixed column (2) and the bottom surface of the inner cavity (11) of the cylinder body (1), and a compression spring (22) that pushes the fixed column (2) upward is provided between the bottom of the fixed column (2) and the bottom surface of the inner cavity (11). A second intake pipe (12) communicating with the first ventilation cavity (21) is provided at the bottom of the cylinder body (1), and a ventilation cavity air outlet (211) communicating with the first ventilation cavity (21) is provided on the side wall of the cylinder body (1). An annular support portion (23) is provided at the upper end of the fixed column (2), and the upper end of the annular support portion (23) is used to abut against the bottom of the groove to be detected of the workpiece to be detected (10). The channel size of the first ventilation cavity (21) is associated with the axial position of the fixed column (2) in the inner cavity (11), and then the channel size of the first ventilation cavity (21) is associated with the depth of the groove to be detected of the workpiece to be detected (10); A second ventilation cavity (24) is provided in the middle of the fixed column (2), and a first intake pipe (241) communicating with the second ventilation cavity (24) is provided on the side wall of the fixed column (2). A through hole (14) for the first intake pipe (241) to pass through is provided on the side wall of the cylinder body (1), and the dimension of the through hole (14) in the height direction is greater than the outer diameter of the first intake pipe (241); A detection column (3) is provided at the top of the second ventilation cavity (24) of the fixed column (2) and is hermetically fitted with the second ventilation cavity (24). The outer wall of the detection column (3) is coaxial with the inner wall of the annular support portion (23). A ventilation channel (31) communicating with the second ventilation cavity (24) is provided inside the detection column (3), and an outlet (311) of the ventilation channel (31) is located on the side wall of the detection column (3). An air outlet channel (32) is formed between the periphery of the outlet (311) of the ventilation channel (31) and the inner wall of the hole to be detected of the workpiece to be detected (10). The size of the air outlet channel (32) is associated with the aperture of the hole to be detected of the workpiece to be detected. The larger the aperture of the hole to be detected of the workpiece to be detected, the larger the air outlet channel (32); the smaller the aperture of the hole to be detected of the workpiece to be detected, the smaller the air outlet channel (32); An air-electric measuring instrument is connected to the first intake pipe (241) and the second intake pipe (12) respectively through pipelines, and the air-electric measuring instrument is used to measure the aperture of the hole to be detected and the depth of the groove to be detected of the workpiece to be detected (10).

2. The aperture and groove depth detection device according to claim 1, characterized in that: A cover body (4) that closes the inner cavity (11) is provided at the bottom end of the cylinder body (1). An intake hole (41) connected to the second intake pipe (12) is provided in the middle of the cover body (4), and a sealing block (242) is provided at a position near the intake hole (41) at the bottom end of the second ventilation cavity (24).

3. The aperture and groove depth detection device according to claim 1, characterized in that: An annular groove (25) is provided at a position on the side wall of the fixed column (2) close to the cover body (4). A limiting convex portion (251) is provided on the side wall of the annular groove (25). The compression spring (22) is located between the end face of the annular groove (25) and the end face of the cover body (4) and below the limiting convex portion (251).

4. The aperture and groove depth detection device according to claim 3, characterized in that: The air outlet (211) of the air vent cavity is provided on one side of the annular groove (25), and a limiting pin (252) extending into the air outlet (211) of the air vent cavity is provided on the side wall of the annular groove (25).

5. The aperture and groove depth detection device according to claim 2, characterized in that: A first annular air groove (42) is provided on the end face of the cover body (4) facing the inner cavity (11) and on the periphery of the outlet of the air inlet hole (41). A first air guide groove (43) penetrating the end face of the cover body (4) is provided on one side of the first annular air groove (42).

6. The aperture and groove depth detection device according to claim 1, characterized in that: The air passage (31) includes a first air passage (312) arranged along the axis of the detection column (3) and a plurality of second air passages (313) perpendicular to the first air passage (312) and arranged radially.

7. The aperture and groove depth detection device according to claim 1, characterized in that: A second annular air groove (314) is provided on the periphery of the side wall of the detection column (3) corresponding to the outlet (311) of the air passage (31). A second air guide groove (315) communicating with the outside is provided on the side of the second annular air groove (314).

8. A detection method for the detection device according to any one of claims 1-7, characterized in that it includes: S1: Set the detection position where the pneumoelectric measuring instrument is connected to the first air inlet pipe as aperture detection and input the aperture measurement value and tolerance range, and set the detection position where the pneumoelectric measuring instrument is connected to the second air inlet pipe as groove depth detection and the groove depth detection value and tolerance range; S2: Calibrate the standard aperture with the lower tolerance limit value and the standard groove depth with the lower tolerance limit value of the pneumoelectric measuring instrument detection position by using a standard part with a standard aperture with the upper tolerance limit value and a standard groove depth with the upper tolerance limit value, and calibrate the standard aperture with the upper tolerance limit value and the standard groove depth with the upper tolerance limit value of the pneumoelectric measuring instrument detection position by using a standard part with a standard aperture with the upper tolerance limit value and a standard groove depth with the upper tolerance limit value; S3: Assemble the workpiece to be detected onto the detection device, and the inner hole to be detected of the workpiece to be detected is matched with the detection column, and the groove to be detected of the workpiece to be detected is matched with the annular supporting portion; S4: Start the pneumoelectric measuring instrument to detect the aperture and groove depth of the workpiece to be detected respectively.

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