A taper hole taper detection device and detection method

Abstract

The application relates to a taper hole taper degree detection device and a detection method, and relates to the technical field of detecting measuring tools. The taper hole taper degree detection device comprises a plug gauge, a micrometer assembly, a digital display assembly and a standard ring gauge used for calibrating the micrometer assembly and the digital display assembly to zero; a plurality of through holes are formed in the plug gauge; the micrometer assembly comprises a micrometer capable of being inserted into the through holes and detachably connected with the plug gauge; the digital display assembly is detachably connected with the plug gauge and can calculate and process data information measured by the micrometer and display the data information in real time. The taper hole taper degree detection method comprises the following steps: (1) calibrating to zero by using the standard ring gauge; (2) abutting the plug gauge taper surface section against a to-be-detected taper hole; (3) measuring the plug gauge every 120 degrees; and (4) judging whether the taper degree is qualified by displaying the value by the digital display assembly and carrying out appropriate repair adjustment on the measured taper hole. The application has the effects of simple operation, convenient carrying, accurate measurement and suitability for taper hole taper degree detection in batch production.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of detecting measuring tools, in particular to a taper hole taper detection device and a detection method. BACKGROUND

[0002] In the manufacturing field, taper hole matching has always been the most commonly used matching method in mechanical design, such as machine tool spindle tool handle mounting hole, pin hole, etc. have the characteristics of taper matching surface, in order to meet the needs of various matching, it is often necessary to detect the taper of the taper hole.

[0003] At present, when the quality inspection personnel detects whether the taper of the taper hole is qualified, generally, the standard taper plug gauge is combined with oil clay, and whether the taper of the taper hole is qualified is judged by observing the coverage of the oil clay on the surface of the plug gauge. This method of using plug gauge coloring to detect whether the taper hole is qualified has obvious defects: it can only roughly and simply determine whether the taper is qualified, the subjective judgment consciousness is strong, it is not objective, and the error rate is large.

[0004] Although the three-dimensional measuring instrument such as the profilometer can accurately detect the taper value of the taper hole, the cost of the detection instrument is high, and it takes about 20 minutes to detect one taper hole, the detection efficiency is low, it is not suitable for on-site measurement in the workshop, and it cannot meet the process control requirements of batch production.

[0005] The Chinese patent with the patent publication number CN109357600B discloses a taper hole taper detection device, which comprises a support bottom plate, a support column, a support sliding rod, a measuring rod, a micrometer, a detection frame, a sliding block, a measuring scale and a wedge block. The structure in the technical solution is relatively complex, there are many matched parts, and it is difficult to meet the high-precision measurement due to the machining and assembly precision of the parts. Moreover, the movement distance of the measuring scale and the reading change of the micrometer need to be recorded respectively during measurement, and then the taper of the taper hole is calculated according to the corresponding formula, so the efficiency is low.

[0006] Therefore, there is a need for a taper hole taper detection device and a detection method which are convenient to use, accurate in measurement and suitable for batch production. SUMMARY

[0007] In order to solve the defects in the related art, the application provides a taper hole taper detection device and a detection method which are simple to operate, convenient to carry, accurate in measurement and suitable for batch production.

[0008] In the first aspect, the taper hole taper measurement device provided by the application adopts the following technical scheme:

[0009] The taper hole taper detection device comprises a plug gauge and a micrometer assembly, the plug gauge is provided with at least two through holes, the central axis of the through hole is inclined to the central axis of the plug gauge, and the through hole is inclined from one side of the plug gauge to the other side; the micrometer assembly comprises a micrometer inserted in each through hole; the front end of the micrometer is provided with a probe head capable of extending out of the through hole, and at least two probe heads are arranged staggered along the axial direction of the plug gauge; the taper hole taper detection device further comprises a digital display assembly capable of calculating and displaying the data information measured by the micrometer in real time.

[0010] By adopting the above technical scheme, the through hole is arranged on the commonly used plug gauge, and the micrometer is inserted in the through hole, so that the plug gauge and the micrometer assembly are organically combined, and the plug gauge is endowed with more accurate detection function; the plug gauge is provided with at least two through holes, and the central axis of the through hole is inclined to the central axis of the plug gauge; the probe head of the micrometer is arranged staggered along the axial direction of the plug gauge, so that at least two micrometers can be installed on each plug gauge; the probe heads of different axial sections of the plug gauge detect different positions of the taper hole, so that the accuracy of taper detection is improved; the digital display assembly has sensitive calculation function and display precision, and can calculate and display the data information measured by the micrometer in real time.

[0011] Optionally, the plug gauge comprises a conical section and a cylindrical section; the through hole comprises an inlet hole in the cylindrical section and an outlet hole in the conical section; the probe head of the micrometer can be extended and retracted along the axial direction of the through hole, and when the probe head of the micrometer is in the extended state, it will extend 1-2mm out of the outlet hole.

[0012] By adopting the above technical scheme, the probe head of the micrometer can be extended and retracted along the axial direction of the through hole, so that the probe head can be slightly moved according to the actual fitting condition of the conical section of the plug gauge and the measured taper hole; when the probe head is in the extended state, it will extend 1-2mm out of the outlet hole, so that each probe head can contact the wall of the taper hole after the plug gauge is inserted into the measured taper hole.

[0013] Optionally, the micrometer is detachably inserted into the through hole of the plug gauge, the plug gauge is provided with a limiting flange at the outlet hole of the through hole to prevent the micrometer from sliding out of the outlet hole; the cylindrical section of the plug gauge is provided with a threaded hole communicated with the through hole, and a locking screw or bolt capable of locking the micrometer in the through hole is screwed in the threaded hole.

[0014] By adopting the technical scheme, the micrometer is automatically dropped to the limiting flange and abuts against the limiting flange when the user inserts the micrometer into the through hole each time, so that the automatic positioning function is realized, and the user avoids wasting much time in adjusting the position of the micrometer in the through hole each time; the cylindrical section of the plug gauge is provided with a threaded hole in communication with the through hole, and the user can screw a corresponding tightening screw or bolt into the threaded hole to abut against the micrometer, so that the relative position of the micrometer and the plug gauge is locked.

[0015] Optionally, the plug gauge further comprises a handle section which is convenient for the user to hold, and the handle section is sleeved with a rubber sleeve for anti-skid or is processed with knurls on the surface.

[0016] By adopting the technical scheme, the handle section is convenient for the user to hold the plug gauge, and the rubber sleeve or the knurls can increase the friction force of the user holding the handle section, thereby effectively preventing skid.

[0017] Optionally, the digital display assembly is detachably connected to the end of the handle section, and the micrometer assembly further comprises a transmission line for electrically connecting the micrometer and the digital display assembly.

[0018] By adopting the technical scheme, the digital display assembly is detachably connected to the end of the handle section, so that the plug gauge and the digital display assembly are integrally designed, the overall structure of the detection device is simple and compact, the detection device is convenient to carry, and the user can observe the taper qualification of the measured taper hole in time; the transmission line is electrically connected with the micrometer and the digital display assembly, and can transmit the micro displacement distance information of the detection head to the digital display assembly in real time.

[0019] Optionally, the micrometer is in the form of an elongated rod, comprises a rod body and a spring, the rod body is provided with a blind hole, the spring is located in the blind hole and acts on the detection head and the bottom of the blind hole respectively, and the detection head is in sliding connection with the blind hole.

[0020] By adopting the technical scheme, the spring installed in the blind hole is in a compressed state, the two ends of the spring abut against the detection head and the rod body at the bottom of the blind hole respectively, and the detection head can slide along the central axis of the blind hole and keep the tendency of extending out of the outlet of the through hole of the plug gauge under the elastic restoring force of the spring.

[0021] Optionally, the micrometer further comprises a displacement sensor which can monitor the axial displacement value of the detection head in real time and transmit the data information to the digital display assembly through the transmission line; the detection head is provided with a signal rod which can be slidably inserted into the displacement sensor and electrically connected with the displacement sensor.

[0022] By adopting the technical scheme, the displacement sensor has high position sensing precision, and is electrically connected with the signal rod of the probe head to monitor the axial displacement value of the probe head in real time and transmit data information to the digital display assembly.

[0023] Optionally, the digital display assembly comprises function buttons for controlling switching on and off, data saving and data clearing, a display screen capable of displaying error value of each measurement, total measurement number and qualified rate information in real time, and a battery detachably connected with the shell of the digital display assembly; the digital display assembly further comprises a data storage module for saving data information measured by the micrometer assembly and a micro-processing module for calculating and analyzing data information, and the data storage module is electrically connected with the micrometer assembly and the micro-processing module.

[0024] By adopting the technical scheme, the function buttons have several functions, which can realize switching on and off, data saving and data clearing of the digital display assembly; the display screen can directly display error value of each measurement, total measurement number and qualified rate information when the user detects the taper hole; the shell of the digital display assembly is detachably connected with a dry battery or a rechargeable battery, which provides energy for normal operation of the micrometer assembly and the digital display assembly; the digital display assembly has the data storage module and the micro-processing module which are electrically connected with each other, and can save and calculate and analyze data information from the micrometer assembly.

[0025] Optionally, the digital display assembly further comprises a voice module capable of voice broadcasting whether the measured taper is qualified or not; the taper hole taper detection device further comprises a standard ring gauge for calibrating and setting zero of the micrometer assembly and the digital display assembly.

[0026] By adopting the technical scheme, the user can observe the qualified condition of the measured taper hole taper through the display screen or directly know the condition through the broadcast voice of the voice module; the standard ring gauge is used for calibrating and setting zero of the micrometer assembly and the digital display assembly, and the user can calibrate and set zero by using the standard ring gauge according to experience or after detecting a certain number of taper holes, so as to ensure the accuracy of continuous detection of the detection device.

[0027] In the second aspect, the taper hole taper detection method provided by the application adopts the following technical scheme:

[0028] A taper hole taper detection method comprises the following steps:

[0029] (1) Zero calibration: abutting the taper surface segment of the plug gauge provided with a micrometer with the taper hole of the standard ring gauge, and pressing the corresponding function button to clear data after the data of the digital display device is stable;

[0030] (2) Close fitting: placing the plug gauge with data zero calibration into the taper hole of the workpiece to be detected, and ensuring that the taper surface segment of the plug gauge is in close contact with the taper hole before starting measurement.

[0031] (3) Multi-point measurement: the plug gauge is measured every 120 degrees;

[0032] (4) Qualified condition judgment and adjustment: if the measured value of each micrometer displayed by the digital display assembly deviates more than 1 micron during each measurement, the workpiece is judged to be unqualified and needs to be repaired until the displayed value deviation is less than 1 micron.

[0033] By adopting the above technical scheme, the tediousness and subjective error of the traditional detection method are avoided, the efficiency and accuracy of detection are improved, and the taper hole taper detection is more suitable for workshop batch production.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. A through hole is formed on the commonly used plug gauge, and a micrometer is inserted in the through hole, thereby realizing the organic combination of the plug gauge and the micrometer assembly, and giving the plug gauge more accurate detection function; at least two through holes are formed on the plug gauge, and the axis of the through hole is inclined to the axis of the plug gauge, and the detection head of the micrometer is arranged staggered along the axis direction of the plug gauge, so that at least two micrometers can be installed on each plug gauge, and the detection heads of different shaft sections on the plug gauge detect different positions of the taper hole, improving the accuracy of taper detection; the digital display assembly has sensitive calculation function and display precision, and can calculate and display the data information measured by the micrometer in real time.

[0036] 2. The detection head of the micrometer can be telescopic along the axis direction of the through hole, so as to realize the micro-sliding of the detection head according to the actual fitting condition of the plug gauge taper section and the measured taper hole; when the detection head is in the elongated state, it will protrude from the hole 1-2mm, ensuring that each detection head can contact the wall of the taper hole after the plug gauge is inserted into the measured taper hole.

[0037] 3. A limiting flange is processed at the hole outlet of each through hole, and each time the user inserts the micrometer into the through hole, the micrometer will automatically fall to the limiting flange and abut against it, thereby realizing the function of automatic positioning and avoiding the user wasting a lot of time adjusting the position of the micrometer in the through hole each time; the cylindrical section of the plug gauge is provided with a threaded hole communicating with the through hole, and the user can screw the corresponding tightening screw or bolt into the threaded hole to abut against the micrometer, thereby locking the relative position of the micrometer and the plug gauge.

[0038] 4. The design of the handle section facilitates the user to hold the plug gauge, and the rubber sleeve or the knurling can increase the friction force of the user holding the handle section, thereby effectively preventing slipping.

[0039] 5. The digital display assembly is detachably connected to the end of the handle section to realize the integrated design of the plug gauge and the digital display assembly, so that the overall structure of the detection device is simple and compact, convenient to carry, and convenient for the user to observe the taper qualification of the measured taper hole in time; the transmission line is electrically connected with the micrometer and the digital display assembly, and can transmit the micro displacement distance information of the probe head to the digital display assembly in real time.

[0040] 6. The spring installed in the blind hole is in a compressed state, and the two ends of the spring are respectively in abutment with the probe head and the rod body at the bottom of the blind hole. Under the action of the elastic restoring force of the spring, the probe head can slide along the central axis direction of the blind hole and keep the tendency of extending out of the hole opening of the plug gauge.

[0041] 7. The displacement sensor has high position sensing accuracy, is electrically connected with the signal rod of the probe head to monitor the axial displacement value of the probe head in real time and transmit the data information to the digital display assembly.

[0042] 8. The function keys have several, which can realize the functions of turning on and off the digital display assembly, data saving and data clearing; the display screen can directly display the error value, the total number of measurements and the qualified rate information of the user each time when detecting the taper hole; the shell of the digital display assembly is detachably connected with a dry battery or a rechargeable battery, which provides energy for the normal work of the micrometer assembly and the digital display assembly; the digital display assembly has a data storage module and a micro processing module which are electrically connected with each other, and can save and calculate the data information transmitted from the micrometer assembly.

[0043] 9. The user can observe the taper qualification of the measured taper hole through the display screen or directly through the broadcast voice of the voice module; the standard ring gauge is used for calibrating and setting zero of the micrometer assembly and the digital display assembly, and the user can use the standard ring gauge to calibrate and set zero according to experience or after detecting a certain number of taper holes, so as to ensure the accuracy of continuous detection of the detection device.

[0044] 10. The traditional detection method is avoided, the efficiency and accuracy of detection are improved, and the taper detection of the taper hole is more suitable for batch production in the workshop. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is the overall structure schematic diagram of the taper hole taper detection device in the present application.

[0046] Figure 2 is the plug gauge three-dimensional structure schematic diagram of the micrometer assembly and the digital display assembly installed in the present application.

[0047] Figure 3 is the local sectional structure schematic diagram of the taper hole taper detection device in the present application.

[0048] Figure 4is the profile structure diagram of the micrometer in the application.

[0049] Figure 5 is the working principle diagram of the micrometer assembly and the digital display assembly in the application.

[0050] Figure 6 is the flow chart of the taper hole taper detection method in the application.

[0051] Reference signs: 1, plug gauge; 11, through hole; 111, inlet aperture; 112, outlet aperture; 12, taper section; 13, cylindrical section; 131, threaded hole; 14, limiting flange; 15, handle section; 151, rubber sleeve; 152, knurling;

[0052] 2, micrometer assembly; 21, micrometer; 211, probe head; 2111, signal rod; 212, rod body; 2121, blind hole; 213, spring; 214, displacement sensor; 22, transmission line;

[0053] 3, digital display assembly; 31, function button; 32, display screen; 33, battery; 34, data storage module; 35, micro-processing module; 36, voice module; 37, set screw;

[0054] 4, standard ring gauge; 41, standard taper hole. DETAILED DESCRIPTION

[0055] The following will be described in detail in combination with the accompanying drawings. Figure 1 - the accompanying drawings Figure 6 , the application will be further described in detail.

[0056] The embodiment discloses a taper hole taper detection device:

[0057] Reference Figure 1 A taper hole taper detection device, comprising a plug gauge 1, a micrometer assembly 2, a digital display assembly 3 and a standard ring gauge 4, the micrometer assembly 2 is detachably connected to the plug gauge 1, and the digital display assembly 3 is locked at the end of the handle section 15 of the plug gauge 1 through a set screw 37. The whole detection device has simple structure and is convenient to carry, the micrometer assembly 2 and the digital display assembly 3 can accurately detect and display the measured taper hole, the standard ring gauge 4 is used for calibrating and setting zero of the micrometer assembly 2 and the digital display assembly 3, the user can calibrate and set zero by using the standard ring gauge 4 according to experience or after detecting a certain number of taper holes, so that the accuracy of continuous detection of the detection device is ensured, and the detection device is very suitable for taper hole taper detection in workshop batch production.

[0058] Reference Figure 1 and Figure 2, the plug gauge 1 is provided with at least two through holes 11, the central axis of the through hole 11 is inclined to the central axis of the plug gauge 1, and the through hole 11 is inclined from one side of the plug gauge 1 to the other side of the plug gauge 1; the micrometer assembly 2 comprises a micrometer 21 inserted in each through hole 11; the front end of the micrometer 21 is provided with a probe head 211 capable of extending out of the through hole 11, and at least two probe heads 211 are arranged staggered along the axial direction of the plug gauge 1. The embodiment realizes the organic combination of the plug gauge 1 and the micrometer assembly 2 by opening the through hole 11 on the commonly used plug gauge 1 and inserting the micrometer 21 in the through hole 11, thereby giving the plug gauge 1 more accurate detection function; the plug gauge 1 is provided with at least two through holes 11, the central axis of the through hole 11 is inclined to the central axis of the plug gauge 1, and the probe head 211 of the micrometer 21 is arranged staggered along the axial direction of the plug gauge 1, the probe head 211 of the plug gauge 1 on different shaft sections detects different positions of the taper hole, and the accuracy of taper detection is improved. The number of through holes 11 is 2 as a preferred scheme in the embodiment, so as to reduce the difficulty of processing and the complexity of installation, but in other embodiments, other numbers of through holes 11 can be opened, which can be 3, 4 or 5, so that the corresponding number of micrometers 21 can be inserted to realize multi-point measurement of the taper hole wall.

[0059] Referring to Figure 1 and Figure 2 , the plug gauge 1 comprises a taper section 12 and a cylindrical section 13; the through hole 11 comprises an inlet hole 111 located on the cylindrical section 13 and an outlet hole 112 located on the taper section 12, a plurality of inlet holes 111 are circumferentially distributed on the cylindrical section 13, and a plurality of outlet holes 112 are axially staggered arranged on the taper section 12. The probe head 211 of the micrometer 21 can be extended and retracted along the axial direction of the through hole 11, so as to realize the fine sliding of the probe head according to the actual fitting of the plug gauge taper section and the measured taper hole; and when the probe head 211 of the micrometer 21 is in the elongated state, it will extend 1-2mm at the outlet hole 112, so that each probe head 211 can contact the taper hole wall after the plug gauge 1 is inserted into the measured taper hole.

[0060] Referring to Figure 1 and Figure 2 , the plug gauge 1 further comprises a handle section 15 for the user to hold, and the handle section 15 is provided with a rubber sleeve 151 for anti-skid or a knurled surface 152. The design of the handle section 15 facilitates the user to hold the plug gauge, and the rubber sleeve or the knurled surface can increase the friction force of the user holding the handle section, thereby effectively preventing slipping.

[0061] Referring to Figure 2 and Figure 3, the micrometer 21 is detachably inserted into the through hole 11 of the plug gauge 1, the plug gauge 1 is provided with a limiting flange 14 at the outlet opening 112 of the through hole 11 to prevent the micrometer 21 from sliding out of the outlet opening 112, and the micrometer 21 will automatically fall to and abut against the limiting flange 14 each time the user inserts the micrometer 21 into the through hole 11, thereby achieving the function of automatic positioning and avoiding the user wasting a lot of time each time due to adjusting the position of the micrometer 21 in the through hole 11; the plug gauge 1 is provided with a threaded hole 131 in communication with the through hole 11, and a tightening screw or bolt is screwed into the threaded hole 131 to lock the micrometer 21 in the through hole 11.

[0062] With reference to Figure 2 and Figure 3 , the micrometer assembly 2 further comprises a transmission line 22 for electrically connecting the micrometer 21 and the digital display assembly 3, so as to transmit the micro-motion sliding distance information of the probe head 211 to the digital display assembly 3 in real time.

[0063] With reference to Figure 3 , the micrometer 21 is in the shape of an elongated rod and comprises a rod body 212 and a spring 213, the rod body 212 is provided with a blind hole 2121, the spring 213 is located in the blind hole 2121 and acts on the probe head 211 and the bottom of the blind hole 2121 at both ends, and the probe head 211 is in sliding connection with the blind hole 2121. The spring 213 installed in the blind hole 2121 is in a compressed state, and the two ends of the spring 213 abut against the probe head 211 and the rod body 212 at the bottom of the blind hole 2121, respectively, and the probe head 211 can slide along the central axis direction of the blind hole 2121 and keep the tendency of extending out of the outlet opening 112 of the through hole 11 of the plug gauge 1 under the action of the elastic restoring force of the spring 213.

[0064] With reference to Figure 4 , the micrometer 21 further has a displacement sensor 214 inside for monitoring the axial displacement value of the probe head 211 in real time and transmitting the data information to the digital display assembly 3 through the transmission line 22; the probe head 211 has a signal rod 2111, which can be slidably inserted into the displacement sensor 214 and electrically connected with the displacement sensor 214.

[0065] With reference to Figure 2 and Figure 5The digital display assembly 3 includes several function buttons 31 for controlling the switching on and off, data saving and data clearing, a display screen 32 capable of displaying the error value of each measurement, the total number of measurements and the qualified rate information in real time, and a battery 33 detachably connected with the shell of the digital display assembly 3. The digital display assembly 3 further has a data storage module 34 for saving the data information measured by the micrometer assembly 2 and a micro-processing module 35 for calculating and analyzing the data information, and the data storage module 34 is electrically connected with the micrometer assembly 2 and the micro-processing module 35. The digital display assembly 3 further has a voice module 36 capable of voice broadcasting whether the measured taper is qualified, so that the user can observe the qualified condition of the measured taper hole taper through the display screen 32 or directly know the condition through the broadcast voice of the voice module 36.

[0066] The embodiment further discloses a taper hole taper detection method.

[0067] With reference to Figure 6 The taper hole taper detection method comprises the following steps:

[0068] (1) Zero calibration: abuttingly connect the taper surface section 12 of the plug gauge 1 provided with the micrometer 21 with the standard taper hole 41 of the standard ring gauge 4, and press the corresponding function button 31 to clear the data after the data of the digital display assembly 3 is stable;

[0069] (2) Close fitting: place the plug gauge 1 with the data cleared into the taper hole of the workpiece to be measured, and ensure that the taper surface section 12 of the plug gauge 1 is in close contact with the taper hole before starting the measurement;

[0070] (3) Multi-point measurement: rotate the plug gauge 1 to measure once every 120 degrees;

[0071] (4) Qualified condition judgment and adjustment: if the measured value of each micrometer 21 displayed by the digital display assembly 3 deviates more than 1 micron during each measurement, it is judged that the workpiece is unqualified and needs to be repaired until the display value deviation is less than 1 micron.

[0072] Compared with the traditional detection method which is complicated and has obvious subjective error, the detection method provided by the application improves the detection efficiency and accuracy, and is more suitable for the taper hole taper detection of workshop batch production.

[0073] The principle of the embodiment of the present application is that after the user installs the micrometer assembly 2 and the digital display assembly 3 on the plug gauge 1, the zero calibration operation is performed first, that is, the taper surface section 12 of the plug gauge 1 provided with the micrometer 21 is abutted and matched with the standard taper hole 41 of the standard ring gauge 4, and after the data displayed by the digital display assembly 3 is stable, the corresponding function button 31 is pressed to clear the data. After the zero calibration work is completed, the user can hold the handle section 15 of the plug gauge 1, take the taper hole taper detection device to the workshop or other places where it is needed to be used, and after the workpiece to be measured is not taken off from the lathe, the taper surface section 12 of the plug gauge 1 is abutted and matched with the taper hole of the workpiece to be measured, then the data information on the display screen 32 is observed, and the plug gauge is rotated to measure every 120 degrees, and if the deviation of the values measured by the three micrometers 21 is greater than 1 micron in the three readings, it is judged that the workpiece is unqualified and needs to be repaired, until the deviation of the displayed values is less than 1 micron.

[0074] The embodiments of the specific embodiment are the preferred embodiments of the present application, and are not limited to the protection scope of the present application, wherein the same parts are indicated by the same reference numerals. Therefore, equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A taper detection device for a conical bore, comprising a plug gauge (1) and a micrometer assembly (2); characterized in that: The plug gauge (1) has at least two through holes (11), the central axis of the through hole (11) is inclined to the central axis of the plug gauge (1), and the through hole (11) is inclined through one side of the plug gauge (1) to the other side of the plug gauge (1); The micrometer assembly (2) includes a micrometer (21) inserted into each of the through holes (11); the front end of the micrometer (21) has a probe (211) which can extend out of the through hole (11), and at least two probes (211) are staggered along the axial direction of the plug gauge (1); The tapered hole taper detection device also includes a digital display component (3) that can calculate and process the data information measured by the micrometer (21) and display it in real time. The digital display component (3) includes function buttons (31) for controlling power on / off, data saving and data clearing, a display screen (32) that can display the error value, total number of measurements and pass rate information for each measurement in real time, and a battery (33) that is detachably connected to the housing of the digital display component (3). The digital display component (3) also has a data storage module (34) for storing the data information measured by the micrometer component (2) and a microprocessor module (35) for calculating and analyzing the data information. The data storage module (34) is electrically connected to the micrometer component (2) and the microprocessor module (35). The plug gauge (1) includes a conical section (12) and a cylindrical section (13); the through hole (11) includes an inlet (111) located in the cylindrical section (13) and an outlet (112) located in the conical section (12); the probe (211) of the micrometer (21) can extend and retract along the axial direction of the through hole (11), and when the probe (211) of the micrometer (21) is in the extended state, it will extend 1-2 mm out of the outlet (112); The micrometer (21) is detachably inserted into the through hole (11) of the plug gauge (1). The plug gauge (1) is provided with a limiting flange (14) at the outlet (112) of the through hole (11) to prevent the micrometer (21) from sliding out of the outlet (112). The cylindrical section (13) of the plug gauge (1) is provided with a threaded hole (131) that communicates with the through hole (11). A set screw or bolt that can lock the micrometer (21) in the through hole (11) is screwed into the threaded hole (131). The micrometer (21) is in the shape of a slender rod, including a rod body (212) and a spring (213). A blind hole (2121) is provided on the rod body (212). The spring (213) is located in the blind hole (2121) and its two ends act on the probe (211) and the bottom of the blind hole (2121) respectively. The probe (211) is slidably connected to the blind hole (2121).

2. The taper detection device for a conical hole according to claim 1, characterized in that: The plug gauge (1) also includes a handle section (15) for easy hand gripping by the user, the handle section (15) being fitted with a rubber sleeve (151) for anti-slip or having a knurled surface (152).

3. The taper detection device for a conical hole according to claim 2, characterized in that: The digital display component (3) is detachably connected to the end of the handle section (15), and the micrometer component (2) further includes a transmission line (22) for electrically connecting the micrometer (21) and the digital display component (3).

4. The taper detection device for a conical hole according to claim 3, characterized in that: The micrometer (21) also has a displacement sensor (214) that can monitor the axial displacement value of the probe (211) in real time and transmit the data information to the digital display component (3) through the transmission line (22). The probe (211) has a signal rod (2111), which can be slidably inserted into the displacement sensor (214) and electrically connected to the displacement sensor (214).

5. The taper detection device for a conical hole according to claim 1, characterized in that: The digital display component (3) also has a voice module (36) that can announce whether the taper measured each time is qualified; the taper detection device also includes a standard ring gauge (4) for calibrating and zeroing the micrometer component (2) and the digital display component (3).

6. A detection method based on the tapered hole taper detection device according to any one of claims 1-5, characterized in that: The detection method includes the following steps: (1) Zeroing: Connect the conical section (12) of the plug gauge (1) with the micrometer (21) to the standard conical hole (41) of the standard ring gauge (4). After the data of the digital display component (3) is stable, press the corresponding function button (31) to clear the data. (2) Tight fit: Place the plug gauge (1) that has been zeroed into the tapered hole of the workpiece to be measured, and start measuring the value after ensuring that the tapered section (12) of the plug gauge (1) fits the tapered hole. (3) Multi-point measurement: Rotate the plug gauge (1) every 120 degrees to measure once; (4) Qualification judgment and adjustment: If the deviation of the values ​​measured by each micrometer (21) displayed by the digital display component (3) is greater than 1 micrometer during each measurement, the workpiece is judged to be unqualified and needs to be repaired again until the deviation of the displayed value is less than 1 micrometer.

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