Universal measuring instrument for detecting inner diameter of parts and method for detecting inner diameter of parts

Abstract

This application relates to a general measuring instrument for inner diameter detection of parts and a method for inner diameter detection of parts. The general measuring instrument includes: N detection devices and a detection table; the detection device includes a contact probe, a measuring arm, a displacement sensor, and a support rod; the measuring arm includes a horizontal movable platform and a positioning arm; the positioning arm is mounted on the support rod, and the horizontal movable platform is movably connected to the positioning arm; the displacement sensor is connected to the positioning arm; the contact probe is arranged at one end of the horizontal movable platform close to the detection position of the detection table, the contact probe is perpendicular to the horizontal movable platform and penetrates the detection table at the detection position; a lifting device is provided under the support rod of each detection device, and the lifting device is used to adjust the height of the support rod of each detection device. The solution provided by this application can perform inner diameter detection on different height positions of the part to be measured, improve the detection accuracy, and can detect parts to be measured of different models, expanding the applicable detection range of the general measuring instrument.

Description

Technical Field

[0001] This application relates to the technical field of general measuring instruments, and particularly to a general measuring instrument for inner diameter detection of parts and a method for inner diameter detection of parts. Background Art

[0002] Currently, in the domestic compressor industry, there is a common problem that the inner diameter and perpendicularity of parts need to be separately submitted for inspection. During the actual inspection process, due to the large number of part models, different measuring instruments need to be replaced to detect parts of different models. The cycle of replacing the measuring instrument is long, and the inspection efficiency is low, which seriously affects the production efficiency of products. Moreover, the purchase cost of measuring instruments corresponding to multiple models of parts is high, occupying production space, and the generalization degree is low.

[0003] In the prior art, in the patent with the publication number CN211717343U (a pneumatic measuring device for aperture size and perpendicularity), a pneumatic measuring method is proposed to simultaneously detect the inner diameter and perpendicularity of a workpiece.

[0004] The above prior art has the following disadvantages:

[0005] It is impossible to detect the inner diameter at different height positions of the part to be measured. The detection through pressure feedback is prone to errors, which is not conducive to improving the detection accuracy of the inner diameter of the part to be measured. Therefore, it is necessary to develop a general measuring instrument that can detect the inner diameter at different height positions of the part to be measured. Summary of the Invention

[0006] To overcome the problems existing in the related art, this application provides a general measuring instrument for inner diameter detection of parts. This general measuring instrument for inner diameter detection of parts can detect the inner diameter at different height positions of the part to be measured, improve the detection accuracy, and can detect parts to be measured of different models, expanding the applicable detection range of the general measuring instrument.

[0007] The first aspect of this application provides a general measuring instrument for inner diameter detection of parts, including:

[0008] N detection devices 1 and a detection table 2, where N is an integer greater than zero;

[0009] The detection device 1 includes a contact detection head 11, a measuring arm 12, a displacement sensor 13, and a support rod 14;

[0010] The measuring arm 12 includes a horizontal movable platform 121 and a positioning arm 122;

[0011] The positioning arm 122 is installed on the support rod 14, and the horizontal movable platform 121 is movably connected to the positioning arm 122; the displacement sensor 13 is connected to the positioning arm 122;

[0012] The contact probe 11 is arranged at one end of the horizontal moving platform 121 close to the detection position 4 of the detection table 2. The contact probe 11 is perpendicular to the horizontal moving platform 121 and penetrates through the detection table 2 at the detection position 4.

[0013] Among the N detection devices 1, a lifting device 5 is provided under each support rod 14 of each detection device 1. The lifting device 5 is used to adjust the height of the support rod 14 of each detection device 1, so that the contact probes 11 of each detection device 1 can respectively perform inner diameter detection on each height position of the part to be measured. The inner diameter detection includes inner diameter measurement and perpendicularity detection.

[0014] In one embodiment, the general gauge for inner diameter detection of parts further includes a support table 3.

[0015] A bearing bracket 6 is connected between the support table 3 and the detection table 2. The bearing bracket 6 is perpendicular to the support table 3 and the detection table 2.

[0016] A bearing head 61 is provided on the inner wall of the side bracket of the bearing bracket 6 close to the support table 3. A vertical shaft 62 is connected between the inner wall of the side bracket of the bearing bracket 6 close to the detection table 2 and the bearing head 61.

[0017] A linear bearing 63 is provided between the inner wall of the side bracket of the bearing bracket 6 close to the detection table 2 and the bearing head 61. The vertical shaft 62 penetrates through the bearing hole of the linear bearing 63.

[0018] In one embodiment, a bearing connection flange 141 is provided on the side edge of the support rod 14, and a shaft through hole is provided in the bearing connection flange 141.

[0019] The bearing connection flange 141 is arranged between the linear bearing 63 and the bearing head 61, and the vertical shaft 62 penetrates through the shaft through hole.

[0020] In one embodiment, a locking bracket 7 is connected to the side bracket of the bearing bracket 6, and a clamp 71 is fixed inside the locking bracket 7.

[0021] The clamping part of the clamp 71 is connected to both ends of the support rod 14 and is used to lock and fix the support rod 14.

[0022] In one embodiment, a first electric slide rail 142 and a second electric slide rail 143 are provided on the support rod 14. The first electric slide rail 142 and the second electric slide rail 143 are oppositely arranged on both sides of the surface of the support rod 14. The surface of the support rod 14 is the surface of the support rod 14 facing the detection table 2.

[0023] The first electric slide rail 142 includes a first slide rail track 1421 and a first slider 1422, and the second electric slide rail 143 includes a second slide rail track 1431 and a second slider 1432. Positioning arms 122 are fixed on both the first slider 1422 and the second slider 1432.

[0024] In one embodiment, M sink grooves 21 and 2N track through grooves 22 are provided on the detection table 2, where M is an integer greater than zero;

[0025] The groove length of the sink groove 21 is longer than that of the track through groove 22;

[0026] Reference alloy bars 23 are installed in the grooves of the M sink grooves 21. The size of the reference alloy bar 23 matches the size of the sink groove 21 and is used to limit the placement position of the part to be measured;

[0027] The contact detection head 11 penetrates through the track through groove 22, enabling the contact detection head 11 to move along the direction of the track through groove 22.

[0028] In one embodiment, the detection position 4 is the central hole of the detection table 2;

[0029] The central hole communicates with the 2N track through grooves 22;

[0030] A guiding sleeve 24 is provided on the central hole. The guiding sleeve 24 includes a sleeve portion 241 and a mounting portion 242;

[0031] When the contact detection head 11 is in the initial position, the contact detection head 11 is exposed in the central hole and is located within the sleeve portion 241.

[0032] In one embodiment, 2N probe openings 2411 are provided on the side surface of the sleeve portion 241, and the set positions of the probe openings 2411 are on the displacement trajectory of the contact detection head 11;

[0033] On the side of the mounting portion 242 away from the sleeve portion 241, a limiting through hole 2421 and a fixing through hole 2422 are provided. The limiting through hole 2421 is used to cooperate with a cylindrical pin to limit the guiding sleeve 24; the fixing through hole 2422 is used to cooperate with a fixing screw to fix the guiding sleeve 24 on the detection table 2;

[0034] On the side of the mounting portion 242 close to the sleeve portion 241, a mounting through groove 2423 parallel to the track through groove 22 in the vertical direction is provided, and the mounting through groove 2423 communicates with the probe opening 2411.

[0035] The second aspect of the present application provides a method for detecting the inner diameter of a part, which is implemented based on the general measuring instrument for detecting the inner diameter of a part described in any of the above, and includes:

[0036] Obtain the factory reference dimensions of the part model corresponding to the part to be tested;

[0037] Determine the type of the guide sleeve and the standard parts according to the factory reference dimensions;

[0038] Install the guide sleeve on the inspection table and install the standard parts on the outer periphery of the guide sleeve;

[0039] Turn on the lifting device to adjust the height of the support rod to the preset height and lock it with the clamp;

[0040] Start the electric slide rail to drive the measuring arm to move. When the contact probe on the measuring arm touches the inner wall of the hole of the standard part, turn off and lock the electric slide rail, and obtain the standard inner diameter of the standard part through the displacement sensor on the measuring arm;

[0041] Determine that the current inner diameter deviation value is 0 according to the standard inner diameter, and determine the standard perpendicularity of the standard part according to the standard inner diameter to complete the calibration;

[0042] Dismantle the standard part and install the part to be tested on the outer periphery of the guide sleeve for inner diameter detection, and the inner diameter detection includes inner diameter measurement and perpendicularity detection.

[0043] In one implementation, after dismantling the standard part and installing the part to be tested on the outer periphery of the guide sleeve for detection, it includes:

[0044] Judge the quality of the part to be tested according to the test results, and the test results include the actual inner diameter size and the actual inner diameter deviation value of the part to be tested;

[0045] If the actual inner diameter size does not match the standard inner diameter, or the actual inner diameter deviation value is not 0, it is determined that the part to be tested is a defective part;

[0046] If the actual inner diameter size matches the standard inner diameter, or the actual inner diameter deviation value is 0, determine the actual perpendicularity according to the actual inner diameter size, and the actual inner diameter size includes the first actual inner diameter size, the second actual inner diameter size and the third actual inner diameter size;

[0047] If the actual perpendicularity does not match the standard perpendicularity, it is determined that the part to be tested is a defective part;

[0048] If the actual perpendicularity matches the standard perpendicularity, it is determined that the part to be tested is a qualified part.

[0049] The technical solution provided by this application may include the following beneficial effects:

[0050] In this application, the positioning arm of the measuring arm is installed on the support rod. The horizontal moving platform of the measuring arm is movably connected to the positioning arm. A contact probe is provided at one end of the horizontal moving platform near the detection position of the detection table. The contact probe is perpendicular to the horizontal moving platform and exposed at the detection position. The displacement sensor is connected to the positioning arm. When measuring the inner diameter of a part to be measured, when the contact probe touches the inner wall of the hole of the part to be measured, the inner wall of the hole can exert a pressure on the contact probe, causing the horizontal moving platform to move. As a result, the displacement sensor can obtain the inner diameter data of the part to be measured and the deviation amount between the inner diameter data and the inner diameter of a pre-calibrated standard part, enabling the inner diameter detection of different types of parts to be measured, improving the inner diameter detection efficiency and accuracy, and expanding the applicable detection range of the universal measuring instrument. By adjusting the height of the support rod through the lifting device, the contact probe can perform inner diameter detection on each height position of the part to be measured, ensuring the detection accuracy of each height position. Obtaining the inner diameter data of different height positions can improve the accuracy of perpendicularity detection and the accuracy of inner diameter detection.

[0051] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this application. Brief Description of the Drawings

[0052] By describing the exemplary embodiments of this application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of this application will become more apparent. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0053] Figure 1 is a schematic structural diagram of one of the detection devices in the universal measuring instrument for part inner diameter detection shown in the embodiments of this application;

[0054] Figure 2 is a schematic structural diagram of the combination of all detection devices of the universal measuring instrument for part inner diameter detection shown in the embodiments of this application;

[0055] Figure 3 is a partial schematic structural diagram of the clamp in the universal measuring instrument for part inner diameter detection shown in the embodiments of this application;

[0056] Figure 4 is a schematic structural diagram of the combination of all detection devices of the universal measuring instrument for part inner diameter detection arranged between the detection table and the support table shown in the embodiments of this application;

[0057] Figure 5 is a schematic structural diagram of the detection position in the detection table of the universal measuring instrument for part inner diameter detection shown in the embodiments of this application;

[0058] Figure 6It is a partial structural schematic diagram of a guiding sleeve in the detection position of a detection table of a general measuring instrument for detecting the inner diameter of a part shown in an embodiment of the present application;

[0059] Figure 7 It is a structural schematic diagram of the detection position of a detection table when a part to be measured is installed on a general measuring instrument for detecting the inner diameter of a part, shown in an embodiment of the present application;

[0060] Figure 8 It is a schematic flowchart of an embodiment of a method for detecting the inner diameter of a part shown in an embodiment of the present application. Detailed implementation manners

[0061] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application will be more thorough and complete, and can fully convey the scope of the present application to those skilled in the art.

[0062] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "the" and "said" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0063] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0064] Embodiment 1

[0065] In the actual detection process, due to the large number of part models, different measuring instruments need to be replaced to detect parts of different models. The cycle of replacing measuring instruments is long and the detection efficiency is low, which seriously affects the production efficiency of products. Moreover, the acquisition cost of measuring instruments corresponding to multiple model parts is high, occupying production space and having a low degree of generalization. The prior art cannot detect the inner diameters of different height positions of the parts to be measured, and the detection through pressure feedback is prone to errors, which is not conducive to improving the detection accuracy of the inner diameters of the parts to be measured. Therefore, it is necessary to develop a general measuring instrument that can detect the inner diameters of different height positions of the parts to be measured.

[0066] In view of the above problems, an embodiment of the present application provides a general measuring instrument for detecting the inner diameter of a part, which can detect the inner diameter of different height positions of the part to be measured, improve the detection accuracy, and can detect parts to be measured of different models, expanding the applicable detection range of the general measuring instrument.

[0067] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings.

[0068] Please refer to Figures 1 to 4 , Embodiment 1 of the general measuring instrument for detecting the inner diameter of a part shown in the embodiment of the present application includes:

[0069] N detection devices 1 and a detection table 2, where N is an integer greater than zero. In the embodiment of the present application, the number of detection devices 1 is 3, which are divided into a top-layer detection device, a middle-layer detection device, and a bottom-layer detection device, and are used to detect the inner diameters of different height positions of the part to be measured. Specifically, the top-layer detection device is used to detect the position within 0-6 mm from the upper surface of the inner hole of the part to be measured; the bottom-layer detection device is used to detect the position within 0-6 mm from the lower surface of the inner hole of the part to be measured; and the middle-layer detection device is used to detect the position between the detection positions of the top-layer detection device and the bottom-layer detection device. It can be understood that the number of detection devices 1 is diverse. In actual applications, the number of detection devices 1 needs to be determined according to the actual application situation, and there is no unique limitation here.

[0070] The detection device 1 includes, but is not limited to, a contact probe head 11, a measuring arm 12, a displacement sensor 13, and a support rod 14. Among them, the measuring arm 12 is a measuring instrument used in the field of mechanical engineering. In the embodiment of the present application, a pen-type probe measuring arm can be used, and its accuracy can reach 2um. It can be understood that in actual applications, other forms of measuring arms can be used for measurement, which depends on the actual application situation and is not uniquely limited here. In the embodiment of the present application, the measuring arm 12 includes a horizontal moving platform 121 and a positioning arm 122. The positioning arm 122 is installed on the support rod 14, and a precise displacement transmission mechanism is provided inside the positioning arm 122. The horizontal moving platform 121 is movably connected to the positioning arm 122, and the displacement sensor 13 is connected to the positioning arm 122. It can be understood that when the horizontal moving platform 121 displaces relative to the positioning arm 122, this displacement can be transmitted to the displacement sensor 13 through the precise displacement transmission mechanism inside the positioning arm 122, enabling the displacement sensor 13 to sense the occurrence of the displacement and convert the physical signal of the displacement into an electrical signal.

[0071] The contact probe head 11 is arranged at one end of the horizontal moving platform 121 close to the detection position 4 of the detection table 2. The contact probe head 11 is perpendicular to the horizontal moving platform 121 and is exposed at the detection position 4. It can be understood that when detecting the inner diameter of the part to be measured, when the contact probe head contacts the inner wall of the hole of the part to be measured, the inner wall of the hole can generate a pressure on the contact probe head, causing the horizontal moving platform to move.

[0072] Among the N detection devices 1, a lifting device 5 is provided under each support rod 14 of the detection devices 1. The lifting device 5 is used to adjust the height of the support rod 14 of each detection device 1, so that the contact probe heads 11 of each detection device 1 can respectively perform inner diameter detection on each height position of the part to be measured. In the embodiment of the present application, the lifting device 5 can adopt a support electric cylinder. In actual applications, the lifting device 5 can adopt other devices to achieve the lifting function, which is not uniquely limited here.

[0073] The inner diameter detection includes inner diameter measurement and perpendicularity detection. Among them, the perpendicularity detection can be calculated through the perpendicularity calculation formula according to the actual inner diameter size obtained by the displacement sensor 13.

[0074] The following beneficial effects can be seen from the above-mentioned Embodiment 1:

[0075] By installing the positioning arm of the measuring arm on the support rod, the horizontal moving platform of the measuring arm is movably connected to the positioning arm. At one end of the horizontal moving platform close to the detection position of the detection table, a contact detection head is provided. The contact detection head is perpendicular to the horizontal moving platform and exposed at the detection position. The displacement sensor is connected to the positioning arm. When detecting the inner diameter of the part to be measured, when the contact detection head contacts the inner wall of the hole of the part to be measured, the inner wall of the hole can generate pressure on the contact detection head, causing the horizontal moving platform to move. As a result, the displacement sensor can obtain the inner diameter data of the part to be measured and the deviation between the inner diameter data and the inner diameter of the pre-calibrated standard part, enabling the inner diameter detection of different types of parts to be measured, improving the inner diameter detection efficiency and accuracy, and expanding the applicable detection range of the universal measuring instrument. By adjusting the height of the support rod through the lifting device, the contact detection head can perform inner diameter detection on each height position of the part to be measured, ensuring the detection accuracy of each height position. Obtaining the inner diameter data of different height positions can improve the accuracy of perpendicularity detection and the accuracy of inner diameter detection.

[0076] Embodiment 2

[0077] For ease of understanding, an embodiment of a universal measuring instrument for inner diameter detection of parts is provided below for illustration. In actual applications, linear bearings are used to ensure the precision of the detection device during vertical movement, and electric sliding rails are used to improve the smoothness of the measuring arm during displacement in the detection process.

[0078] Please refer to Figures 1 to 3 , the second embodiment of the universal measuring instrument for inner diameter detection of parts shown in the embodiments of the present application is as follows:

[0079] In the embodiments of the present application, the universal measuring instrument further includes a support table 3 for supporting the universal measuring instrument. A bearing bracket 6 is connected between the support table 3 and the detection table 2. The bearing bracket 6 is perpendicular to the support table 3 and the detection table 2, enabling the detection device 1 to be installed between the detection table 2 and the support table 3 while providing space for the vertical movement of the detection device 1.

[0080] To ensure the precision of the detection device during vertical movement, a supporting shaft head 61 is provided on the inner wall of one side of the bearing bracket 6 close to the support platform 3. A vertical shaft 62 is connected between the inner wall of one side of the bearing bracket 6 close to the detection platform 2 and the supporting shaft head 61. A linear bearing 63 is provided between the inner wall of one side of the bearing bracket 6 close to the detection platform 2 and the supporting shaft head 61. The vertical shaft 62 passes through the bearing hole of the linear bearing 63. A bearing connection flange 141 is provided on the side edge of the support rod 14. An axial through hole is provided in the bearing connection flange 141. The bearing connection flange 141 is arranged between the linear bearing 63 and the supporting shaft head 61, and the vertical shaft 62 passes through the axial through hole. It can be understood that along the direction from the inner wall of one side of the bearing bracket 6 close to the detection platform 2 towards the inner wall of one side of the bearing bracket 6 close to the support platform 3, the vertical shaft 62 sequentially passes through the linear bearing 63, the bearing connection flange 141, and the supporting shaft head 61, so that during the vertical movement of the lifting device 5 guiding the support rod 14 to rise or fall, the linear bearing 63 can ensure that the bearing connection flange 141 moves in the vertical direction, thereby ensuring that the support rod 14 can rise or fall rigorously in the vertical direction.

[0081] Among them, the linear bearing 63 is a linear motion system used for linear travel in cooperation with a cylindrical shaft. Since the load-bearing balls are in point contact with the bearing outer sleeve and the steel balls roll with the smallest frictional resistance, the linear bearing has small friction and is relatively stable, not changing with the bearing speed, and can obtain a smooth linear motion with high sensitivity and high precision. The supporting shaft head 61 is used to support the detection device 1 when the lifting device 5 does not provide power to the support rod 14, preventing damage to the lifting device 5 and causing unnecessary losses.

[0082] When the lifting device 5 guides the support rod 14 to a preset position, it is necessary to fix the position of the detection device 1 to ensure the stability of the inner diameter detection. In the embodiment of the present application, a locking bracket 7 is connected to the side bracket of the bearing bracket 6. A clamp 71 is fixed inside the locking bracket 7. The clamping part of the clamp 71 is connected to both ends of the support rod 14 and is used to lock and fix the support rod 14, so that the support rod 14 can be stably at the preset height, thereby making the detection device 1 stable during the inner diameter detection process.

[0083] The lifting device 5 is installed in a mounting frame fixed to the support platform 3 to improve the reliability and stability of the detection device 1.

[0084] In the embodiment of the present application, a first electric slide rail 142 and a second electric slide rail 143 are provided on the support rod 14. The first electric slide rail 142 and the second electric slide rail 143 are oppositely arranged on both sides of the surface of the support rod 14, and the surface of the support rod 14 is the surface of the support rod 14 facing the detection table 2. Among them, the first electric slide rail 142 includes a first slide rail track 1421 and a first slider 1422, the second electric slide rail 143 includes a second slide rail track 1431 and a second slider 1432, and positioning arms 122 are fixed on both the first slider 1422 and the second slider 1432, so that the measuring arm 12 can move independently and relatively to adapt to the detection of parts to be measured with different inner diameters of different models. At the same time, the electric slide rail can improve the smoothness of the movement of the measuring arm 12. When the measuring arm 12 reaches the corresponding position, the slide rail track can be locked, so as to fix the position of the measuring arm 12 and provide stable conditions for the inner diameter detection process.

[0085] The following beneficial effects can be seen from the above Embodiment 2:

[0086] By arranging linear bearings in the bearing bracket, the bearing connecting flange can move in the vertical direction during the rising or falling process, so as to ensure that the support rod can rise or fall strictly in the vertical direction and ensure the precision of the detection device during vertical movement; by arranging clamps at both ends of the support rod and arranging opposite first electric slide rails and second electric slide rails on the surface of the support rod, stable conditions are provided for the detection device during the inner diameter detection process, the smoothness of the measuring arm during displacement in the detection process is improved, and the precision of the inner diameter detection is enhanced.

[0087] Embodiment 3

[0088] For the convenience of understanding, the following provides an embodiment of a general gauge for detecting the inner diameter of a part for illustration. In practical applications, a guide sleeve will be arranged at the detection position on the detection table for positioning the part to be measured, and there will also be a sink for limiting the guide sleeve and a track channel for the contact probe to pass through to improve the detection precision of the inner diameter detection.

[0089] Please refer to Figures 5 to 7 , Embodiment 3 of the general gauge for detecting the inner diameter of a part shown in the embodiment of the present application includes:

[0090] M sinks 21 and 2N track through slots 22 are provided on the detection table 2, M is an integer greater than zero. The reason for setting 2N track through slots 22 is that there are two contact probes 11 corresponding to one detection device. Therefore, for N detection devices, 2N track through slots 22 need to be set to ensure that the movement of the contact probes 11 is unobstructed.

[0091] As Figure 7As shown in the figure, the groove length of the sinking groove 21 is longer than that of the track through groove 22. Benchmark alloy bars 23 are installed in the grooves of the M sinking grooves 21. The size of the benchmark alloy bars 23 matches the size of the sinking grooves 21 and is used to limit the placement position of the part to be measured, preventing the part to be measured from rotating around the guide sleeve 24 and affecting the effect of inner diameter detection.

[0092] The contact detection head 11 penetrates through the track through groove 22, so that when the universal measuring instrument is used for detection, the contact detection head 11 can move along the direction of the track through groove 22. The detection position is the central hole of the detection table 2. The central hole communicates with the 2N track through grooves 22. A guide sleeve 24 is provided on the central hole for positioning the part to be measured. Among them, the guide sleeve 24 includes a sleeve part 241 and a mounting part 242. When the contact detection head 11 is in the initial position, the contact detection head 11 is exposed in the central hole and is located within the sleeve part 241. Further, 2N probe openings 2411 are provided on the side surface of the sleeve part 241. The setting positions of the probe openings 2411 are located on the displacement track of the contact detection head 11, so that the contact detection head 11 can move along the corresponding track through groove 22 from the initial position in the sleeve part 241 respectively without being blocked by the guide sleeve 24 and the wall of the central hole.

[0093] In addition, an installation through groove 2423 parallel to the track through groove 22 in the vertical direction is provided on the side of the mounting part 242 close to the sleeve part 241. The installation through groove 2423 communicates with the probe opening 2411. A limit through hole 2421 and a fixing through hole 2422 are provided on the side of the mounting part 242 far from the sleeve part 241. The limit through hole 2421 is used to cooperate with a cylindrical pin to limit the guide sleeve 24, and the fixing through hole 2422 is used to cooperate with a fixing screw to fix the guide sleeve 24 on the detection table 2. Thus, the mounting part can be positioned by using the track through groove 22 and the cylindrical pin to prevent the guide sleeve 24 from rotating, and then fixed by the cooperation of the fixing screw and the fixing through hole 2422 to prevent the guide sleeve 24 from moving left and right along the direction of the track through groove 22 and affecting the stability of inner diameter detection. Moreover, since the installation through groove 2423 is parallel to the track through groove 22 in the vertical direction, the mounting part 242 will not block the movement of the contact detection head 11 either.

[0094] The following beneficial effects can be seen from the above Embodiment 3:

[0095] The method positions the part to be measured by setting a guiding sleeve on the inspection table, and limits the part to be measured by the reference alloy bar in the sunk groove to prevent the part to be measured from rotating. The guiding sleeve is fixed by the cooperation of the limiting through hole and the cylindrical pin and the cooperation of the fixing through hole and the fixing screw, preventing the position of the guiding sleeve from shifting, thus avoiding driving the position of the part to be measured to shift, providing stability for the universal measuring instrument during the inspection process, ensuring that the inspection position does not shift, and improving the inspection accuracy of the inner diameter inspection.

[0096] Embodiment Four

[0097] Corresponding to the foregoing embodiments of the universal measuring instrument for part inner diameter inspection, the present application also provides a method for part inner diameter, which is implemented based on the universal measuring instrument for part inner diameter inspection described in any of the foregoing embodiments, as well as corresponding embodiments of the inspection method.

[0098] Please refer to Figure 8 , the embodiments of the part inner diameter inspection method shown in the embodiments of the present application include:

[0099] 401. Obtain the factory reference size of the part model corresponding to the part to be measured;

[0100] The factory reference size refers to the reference value of the part size before the part is inspected after leaving the factory, which can be obtained by obtaining the content of the part production batch. In practical applications, other obtaining methods can be adopted, and this is not the only limitation here.

[0101] 402. Determine the type of the guiding sleeve and the standard part according to the factory reference size;

[0102] The factory reference size of the part includes but is not limited to the inner diameter. Assuming that the inner diameter of the part to be measured is 20 millimeters, then a guiding sleeve with a diameter of 20 millimeters and a standard part with an inner diameter of 20 millimeters are selected. It can be understood that the data provided above are only exemplary. In practical applications, selections need to be made according to the actual application situation, and this is not the only limitation here.

[0103] 403. Install the guiding sleeve on the inspection table and install the standard part on the outer periphery of the guiding sleeve;

[0104] The method positions the part to be measured by setting a guiding sleeve on the inspection table. After the standard part is installed on the outer periphery of the guiding sleeve, it can avoid the position shift and angular deflection of the standard part, provide stability for the universal measuring instrument during the inspection process, ensure that the inspection position does not shift, and improve the inspection accuracy of the inner diameter inspection.

[0105] 404. Turn on the lifting device to adjust the height of the support rod to the preset height and lock it with the clamp;

[0106] When the height of the support rod reaches the preset height, the clamp will lock and fix the support rod to prevent the height of the support rod from changing again, thereby improving the stability of the inner diameter detection.

[0107] 405. Start the electric slide to drive the measuring arm to move;

[0108] Start the electric slide to drive the measuring arm to move. The contact probe on the measuring arm will move with the measuring arm. During the movement, the contact probe will pass through the probe opening of the sleeve and move along the direction of the track slot. When the contact probe contacts the inner wall of the hole of the standard part, the electric slide is shut down and locked. The standard inner diameter of the standard part is obtained through the displacement sensor on the measuring arm. The accuracy of the measuring arm can reach 2um. It is understandable that when the contact probe contacts the inner wall of the hole of the standard part, the inner wall of the hole will exert a certain pressure on the contact probe, and this pressure will cause the horizontal movable platform to shift. At this time, after the contact probe is stable, the current inner diameter deviation value is set to 0, the current inner diameter size is set to the standard inner diameter, and the standard verticality is calculated according to the standard inner diameter at different height positions to complete the calibration steps.

[0109] 406. Disassemble the standard part and install the part to be tested on the outer periphery of the guide sleeve to detect the inner diameter.

[0110] In the embodiment of the present application, inner diameter detection includes inner diameter measurement and verticality detection.

[0111] After the standard part is disassembled and the part to be tested is installed on the outer periphery of the guide sleeve for testing, the quality of the part to be tested is judged based on the test results, which include the actual inner diameter size and the actual inner diameter deviation value of the part to be tested.

[0112] It is understandable that when the part to be tested is installed on the outer periphery of the guide sleeve for inspection, like the standard parts, the inner wall of the hole of the part to be tested will also produce a certain pressure on the contact detection head, and this pressure will also cause the horizontal movable platform to shift. At this time, after the horizontal movable platform shifts, the difference between the actual deviation value of the part to be tested and 0 and the actual inner diameter size can be obtained, so as to make a quality judgment on the part to be tested.

[0113] If the actual inner diameter size does not match the standard inner diameter, or the actual inner diameter deviation value is not zero, the part to be tested is determined to be a defective part; if the actual inner diameter size matches the standard inner diameter, or the actual inner diameter deviation value is zero, the actual verticality is determined according to the actual inner diameter size, and the actual inner diameter size includes a first actual inner diameter size, a second actual inner diameter size, and a third actual inner diameter size; if the actual verticality does not match the standard verticality, the part to be tested is determined to be a defective part; if the actual verticality matches the standard verticality, the part to be tested is determined to be a good part.

[0114] The following beneficial effects can be seen from the above Embodiment 4:

[0115] By calibrating the general measuring instrument for inner diameter detection of parts, the general measuring instrument can be applied to detect parts with different inner diameters of different models. Moreover, the calibration steps are simple, which reduces the measuring instrument switching time when detecting parts with different inner diameters of different models, improves the detection efficiency, has a wide detection coverage range, and reduces the detection cost; the inner diameter detection accuracy is high, which is beneficial to ensuring the production quality of parts, thereby improving the quality of the produced products.

[0116] The solution of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0117] In addition, the method according to the present application can also be implemented as a computer program or a computer program product, which includes computer program code instructions for executing some or all of the steps in the above method of the present application.

[0118] Alternatively, the present application can also be implemented as a non-transitory machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) with executable code (or computer program, or computer instruction code) stored thereon. When the executable code (or computer program, or computer instruction code) is executed by a processor of an electronic device (or an electronic device, a server, etc.), the processor is caused to execute some or all of the steps of the above method according to the present application.

[0119] Those skilled in the art will also understand that the various exemplary logical blocks, modules, circuits, and algorithm steps described in connection with the applications herein can be implemented as electronic hardware, computer software, or a combination of both.

[0120] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as combinations of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system that performs the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0121] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A general measuring instrument for detecting the inner diameter of parts, characterized in that, Including: N detection devices (1) and a detection table (2), where N is an integer greater than zero; The detection device (1) includes a contact probe head (11), a measuring arm (12), a displacement sensor (13), and a support rod (14); The measuring arm (12) includes a horizontal movable platform (121) and a positioning arm (122); The positioning arm (122) is mounted on the support rod (14), and the horizontal movable platform (121) is movably connected to the positioning arm (122); the displacement sensor (13) is connected to the positioning arm (122); The contact probe head (11) is provided at one end of the horizontal movable platform (121) close to the detection position (4) of the detection table (2), and the contact probe head (11) is perpendicular to the horizontal movable platform (121) and penetrates the detection table (2) at the detection position (4); Among the N detection devices (1), a lifting device (5) is provided under the support rod (14) of each detection device (1), and the lifting device (5) is used to adjust the height of the support rod (14) of each detection device (1) so that the contact probe head (11) of each detection device (1) can respectively perform inner diameter detection on each height position of the part to be measured, and the inner diameter detection includes inner diameter measurement and perpendicularity detection; M sinking grooves (21) and 2N track through grooves (22) are provided on the detection table (2), where M is an integer greater than zero; The groove length of the sinking groove (21) is longer than the groove length of the track through groove (22); A reference alloy bar (23) is installed in the groove of each of the M sinking grooves (21), and the size of the reference alloy bar (23) matches the size of the sinking groove (21) for limiting the placement position of the part to be measured; The contact probe head (11) penetrates the track through groove (22) so that the contact probe head (11) can move along the direction of the track through groove (22); The detection position (4) is the central hole of the detection table (2); The central hole communicates with the 2N track through grooves (22); A guiding sleeve (24) is provided on the central hole, and the guiding sleeve (24) includes a sleeve part (241) and a mounting part (242); When the contact probe head (11) is in the initial position, the contact probe head (11) is exposed in the central hole and is located within the sleeve part (241); It further includes a support table (3); A bearing bracket (6) is connected between the support table (3) and the detection table (2), and the bearing bracket (6) is perpendicular to the support table (3) and the detection table (2); A supporting shaft head (61) is provided on the inner wall of the side bracket of the bearing bracket (6) close to the support table (3), and a vertical shaft (62) is connected between the inner wall of the side bracket of the bearing bracket (6) close to the detection table (2) and the supporting shaft head (61); A linear bearing (63) is provided between the inner wall of one side of the bearing bracket (6) close to the inspection table (2) and the supporting shaft head (61), and the vertical shaft (62) penetrates through the bearing hole of the linear bearing (63).

2. The general measuring instrument for detecting the inner diameter of parts according to claim 1, characterized in that, A bearing connection flange (141) is provided on the side edge of the support rod (14), and a shaft through hole is provided in the bearing connection flange (141); The bearing connection flange (141) is arranged between the linear bearing (63) and the supporting shaft head (61), and the vertical shaft (62) penetrates through the shaft through hole.

3. The general measuring instrument for detecting the inner diameter of parts according to claim 1, characterized in that, A locking bracket (7) is connected to the side bracket of the bearing bracket (6), and a clamp (71) is fixed inside the locking bracket (7); The clamping part of the clamp (71) is connected to both ends of the support rod (14) and is used to lock and fix the support rod (14).

4. The general measuring instrument for detecting the inner diameter of parts according to claim 1, characterized in that, The support rod (14) is provided with a first electric slide rail (142) and a second electric slide rail (143). The first electric slide rail (142) and the second electric slide rail (143) are oppositely arranged on both sides of the surface of the support rod (14), and the surface of the support rod (14) is the surface of the support rod (14) facing the inspection table (2); The first electric slide rail (142) includes a first slide rail track (1421) and a first slider (1422), the second electric slide rail (143) includes a second slide rail track (1431) and a second slider (1432), and the positioning arms (122) are fixed on both the first slider (1422) and the second slider (1432).

5. The general measuring instrument for detecting the inner diameter of parts according to claim 1, characterized in that, 2N probe openings (2411) are provided on the side surface of the sleeve part (241), and the setting positions of the probe openings (2411) are located on the displacement track of the contact detection head (11); On the side of the mounting part (242) far from the sleeve part (241), a limit through hole (2421) and a fixing through hole (2422) are provided. The limit through hole (2421) is used to cooperate with a cylindrical pin to limit the guide sleeve (24); the fixing through hole (2422) is used to cooperate with a fixing screw to fix the guide sleeve (24) on the inspection table (2); On the side of the mounting part (242) close to the sleeve part (241), a mounting through hole (2423) parallel to the track through groove (22) in the vertical direction is provided, and the mounting through hole (2423) communicates with the probe opening (2411).

6. A method for detecting the inner diameter of parts, characterized in that, Implemented based on the universal measuring instrument according to any one of claims 1-5, the detection method includes: Obtaining the factory reference dimensions of the part model corresponding to the part to be measured; Determining the type of the guide sleeve and the standard part according to the factory reference dimensions; Installing the guide sleeve on the inspection table and installing the standard part on the outer periphery of the guide sleeve; Starting the lifting device to adjust the height of the support rod to a preset height and locking it with the clamp; Start the electric slide rail to drive the measuring arm to move. When the contact probe on the measuring arm touches the inner wall of the hole of the standard part, stop and lock the electric slide rail, and obtain the standard inner diameter of the standard part through the displacement sensor on the measuring arm; Determine that the current inner diameter deviation value is 0 according to the standard inner diameter, and determine the standard perpendicularity of the standard part according to the standard inner diameter to complete the calibration; Disassemble the standard part and install the part to be measured on the outer periphery of the guide sleeve for inner diameter detection, and the inner diameter detection includes inner diameter measurement and perpendicularity detection.

7. The method for detecting the inner diameter of a part according to claim 6, characterized in that, After disassembling the standard part and installing the part to be measured on the outer periphery of the guide sleeve for detection, it includes: Judge the quality of the part to be measured according to the detection results, and the detection results include the actual inner diameter size and the actual inner diameter deviation value of the part to be measured; If the actual inner diameter size does not match the standard inner diameter, or the actual inner diameter deviation value is not 0, determine that the part to be measured is a defective part; If the actual inner diameter size matches the standard inner diameter, or the actual inner diameter deviation value is 0, determine the actual perpendicularity according to the actual inner diameter size, and the actual inner diameter size includes the first actual inner diameter size, the second actual inner diameter size and the third actual inner diameter size; If the actual perpendicularity does not match the standard perpendicularity, determine that the part to be measured is a defective part; If the actual perpendicularity matches the standard perpendicularity, determine that the part to be measured is a good part.

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