A guide sleeve inner diameter and wear amount measuring device and method

Abstract

The application provides a guide sleeve inner diameter and wear amount measuring device and method, and relates to the technical field of material detection. The device comprises a guide sleeve, the inside of the guide sleeve is provided with an inner hole, the inside of the inner hole is penetrated by a hole diameter gauge, the outer wall of the hole diameter gauge is provided with a conical surface section, the conical surface section is gap-fitted with the inner hole, the bottom of the conical surface section is provided with a small head cylindrical surface section, the top of the conical surface section is provided with a big head cylindrical surface section, and the outer wall of the conical surface section is provided with a first scale at equal intervals. The application relates to the technical field of material detection, solves the problems that in the prior art, the wear conditions of the guide sleeve inner hole are various, the distance from the guide sleeve inner hole wall to the outer cylindrical surface is measured at the same time of measuring the hole diameter by using a vernier caliper, the shape and position change after the wear of the guide sleeve inner hole is not accurate enough to be measured, it is difficult to measure the wear difference of each orientation and the hole center change condition, the measurement result has deviation, and it is difficult to comprehensively evaluate the compliance of the guide sleeve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material detection, in particular to a guide sleeve inner diameter and wear amount measuring device and method. BACKGROUND

[0002] Before special steel round bars are delivered, internal ultrasonic detection is usually performed to remove round bars with internal quality defects. Local water immersion type automatic ultrasonic detection is generally used for ultrasonic detection of batch round bars. During detection, the round bar directly passes through the cavity of the ultrasonic equipment, and the ultrasonic field rotates around the central axis of the cavity to realize spiral scanning of the round bar. The ultrasonic probe and the round bar are filled with coupling water, and ultrasonic waves are incident into the round bar through the coupling water. The instrument determines the internal quality of the round bar according to the ultrasonic echo signal in the round bar.

[0003] In order to ensure the reliability of detection, it is required that the round bar and the cavity center of the ultrasonic field maintain good dynamic coaxiality. Therefore, one or two guide sleeves with sufficient thickness are respectively arranged at the inlet and outlet of the ultrasonic equipment before detection, a plurality of guide sleeves are combined to form a steel guiding device for detection, and the round bar with an out-of-tolerance shape is prevented from passing through the equipment. There is rotating coupling water in the cavity, and the inner diameter of the inner guide sleeve close to the ultrasonic cavity maintains the thickness of the coupling water layer to ensure good contact with the round bar and the coupling water. The outer circle and the inner hole of the guide sleeve are both cylindrical surfaces, and the inner hole of the guide sleeve is uniformly matched with the round bar to be detected in the circumferential direction. The round bar has various specifications, and the number of guide sleeves is large.

[0004] In actual detection, the inner hole surface of the guide sleeve is often scratched and collided and worn by the round bar. When the circumferential non-uniform wear exceeds a certain range, the stability of the coupling water layer becomes poor, which seriously affects the detection reliability. Since the ultrasonic detection has high reliability requirements, the uniformity control and measurement of the wear of the inner hole of the guide sleeve are very important. Therefore, the wear of the inner hole of the guide sleeve needs to be measured and managed regularly.

[0005] In the prior art, the wear of the inner hole of the guide sleeve is various, the vernier caliper is used to measure the hole diameter, and the distance from the inner hole wall of the guide sleeve to the outer cylindrical surface is also measured. The shape and position change measurement after the wear of the inner hole of the guide sleeve is not accurate enough, it is difficult to measure the wear difference in each direction and the change of the hole center, resulting in deviation of the measurement result, and it is difficult to comprehensively evaluate the compliance of the guide sleeve. SUMMARY

[0006] The purpose of the present application includes providing a guide sleeve inner diameter and wear amount measuring device and method, which solves the problem in the prior art that the wear of the inner hole of the guide sleeve is various, the vernier caliper is used to measure the hole diameter, and the distance from the inner hole wall of the guide sleeve to the outer cylindrical surface is also measured. The shape and position change measurement after the wear of the inner hole of the guide sleeve is not accurate enough, it is difficult to measure the wear difference in each direction and the change of the hole center, resulting in deviation of the measurement result, and it is difficult to comprehensively evaluate the compliance of the guide sleeve.

[0007] Embodiments of the present application can be implemented as follows:

[0008] The first aspect, the present application provides a guide sleeve inner diameter and wear measuring device, including guide sleeve, the inside of guide sleeve is provided with inner hole, the inside of inner hole is penetrated by hole gauge, the outer wall of hole gauge is provided with taper section, taper section is matched with inner hole gap, the bottom of taper section is provided with small head cylindrical section, the top of taper section is provided with big head cylindrical section, the outer wall of taper section is provided with first scale at equal intervals, the top of guide sleeve is provided with measuring dial gauge on one side, the outside of measuring dial gauge is provided with sleeve, sleeve is matched with guide sleeve and is connected, the inside of sleeve is provided with clamping groove, the inner wall of clamping groove is movably connected with ruler, ruler is matched with taper section, the two sides of ruler are provided with second scale upwards and downwards, the outer wall of sleeve is provided with third scale.

[0009] In optional implementation, one side of the hole gauge is provided with a needle gauge, which is matched with the inner hole and the hole gauge respectively, and the outer wall of the needle gauge is provided with a fourth scale.

[0010] In optional implementation, the bottom of the side close to the sleeve is fixedly connected with an arc-shaped ruler, which is matched with the guide sleeve.

[0011] In optional implementation, the top of the sleeve is threadedly connected with a jacking bolt, which is matched with the ruler.

[0012] In optional implementation, the outer wall of the jacking bolt is provided with anti-skid lines.

[0013] In optional implementation, the outer circle and the inner hole are both cylindrical surfaces, the inner hole is matched with the steel round bar in a circumferential uniform gap, and is used for guiding the steel round bar.

[0014] In optional implementation, the diameter of the small head cylindrical section is smaller than the lower limit of the detection specification, and the diameter of the big head cylindrical section is larger than the upper limit of the detection specification.

[0015] In optional implementation, one end of the ruler is beveled, and the angle of the bevel is consistent with the taper angle of the taper section of the hole gauge.

[0016] The second aspect, the present application provides a guide sleeve inner diameter and wear measuring method, the method uses the guide sleeve inner diameter and wear measuring device of the foregoing implementation, and the method comprises the following steps:

[0017] The hole gauge is inserted into the inner hole, the bottom surface of the hole gauge is swung to be parallel to the end surface, the scale at the contact position of the hole gauge and the inner hole is read, and the inner diameter is measured.

[0018] In optional implementation, the method further comprises:

[0019] The distance between the outer circle of the guide sleeve and the aperture gauge is measured from four circumferentially distributed directions by using a distance measuring micrometer, the sleeve is tightly attached to the outer circle of the guide sleeve, the bottom surface of the ruler is tightly attached to the end surface of the guide sleeve, the end with the bevel is tightly attached to the conical surface section of the aperture gauge by moving the ruler, the length value is read by the scale of the ruler and the thousandth scale of the edge of the slot, and the measurement of the wear offset of the center of the inner hole of the guide sleeve is realized.

[0020] The beneficial effects of the guide sleeve inner diameter and wear amount measuring device and method provided by the embodiments of the present application include:

[0021] By the cooperation of the aperture gauge, the small head conical surface section, the large head conical surface section, the first scale, the distance measuring micrometer, the ruler, the sleeve, the slot, the second scale, the third scale, etc., the inner diameter of the guide sleeve is measured by inserting the aperture gauge into the inner hole of the guide sleeve and reading the scale of the contact position of the aperture gauge and the inner hole, the wear offset of the center of the inner hole of the guide sleeve, the eccentricity of the center of the inner hole in a single direction, and the eccentricity of the center of the inner hole of the guide sleeve relative to the outer circle are accurately measured by using the distance measuring micrometer to measure the distance between the outer wall of the aperture gauge and the outer circle of the guide sleeve from four circumferentially distributed directions, reading the length value by the scale of the ruler and the thousandth scale of the edge of the slot, thereby obtaining more evaluation data, improving the diversity of data and the convenience of measurement, and facilitating the comprehensive evaluation of the wear condition of the guide sleeve by the staff.

[0022] By the cooperation of the guide sleeve, the inner hole, the aperture gauge, the needle ruler and the fourth scale, the maximum wear depth of the part is read according to the scale of the contact position of the needle ruler and the inner hole of the guide sleeve by inserting the needle ruler into the wear gap between the inner hole and the aperture gauge in each wear direction according to the guide sleeve inner hole diameter measurement method, the deviation measurement of the wear uniformity of the inner hole of the guide sleeve is performed by observing the wear gap of the inner diameter of the guide sleeve from the circumference and keeping the aperture gauge still, thereby measuring the wear amount of each direction of the inner hole of the guide sleeve, and the compliance of the guide sleeve performance can be determined, the guide sleeve that meets the standard requirements can be used continuously and the corresponding aperture mark can be modified, the guide sleeve that does not meet the requirements can be rejected or the inner diameter of the guide sleeve can be expanded for use of larger steel round bars, thereby helping to improve the utilization efficiency of resources and the flexibility of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0024] Figure 1 The structural schematic diagram of the guide sleeve inner diameter and wear amount measuring device provided by the present application;

[0025] Figure 2 Structure of the guide sleeve inner diameter and wear measuring device provided by the present application is a top view;

[0026] Figure 3 Structure of the ruler, sleeve and jacking bolt is a side view;

[0027] Figure 4 For Figure 1 The local enlarged view of area A;

[0028] Figure 5 For Figure 1 The local enlarged view of area B;

[0029] Figure 6 For Figure 2 The local enlarged view of area C.

[0030] Icon: 1, guide sleeve; 2, inner hole; 3, hole gauge; 4, small head cylindrical section; 5, large head cylindrical section; 6, first scale; 7, distance micrometer; 8, ruler; 9, sleeve; 10, clamping groove; 11, second scale; 12, third scale; 13, needle gauge; 14, fourth scale; 15, arc ruler; 16, jacking bolt; 17, conical section; 18, anti-skid pattern. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0033] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0034] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0037] In the prior art, the wear condition of the guide sleeve inner hole is various, the vernier caliper is used to measure the hole diameter and the distance from the guide sleeve inner hole wall to the outer cylindrical surface, the shape and position change after the wear of the guide sleeve inner hole is not accurate enough, it is difficult to measure the wear difference in each direction and the hole center change condition, resulting in deviation of the measurement result, and it is difficult to comprehensively evaluate the compliance of the guide sleeve.

[0038] Therefore, the embodiment of the present application provides a guide sleeve inner diameter and wear amount measuring device, which is combined through hole gauge, small head cylindrical surface segment, large head cylindrical surface segment, first scale, distance measuring micrometer, ruler, clamping sleeve, clamping groove, second scale, third scale and the like, the hole gauge is inserted into the inner hole of the guide sleeve, the scale at the contact position of the hole gauge and the inner hole is read, the measurement of the inner diameter of the guide sleeve is realized, the distance between the outer wall of the hole gauge and the outer circle of the guide sleeve is measured from the four directions uniformly distributed in the circumferential direction by using the distance measuring micrometer, the length value is read through the scale of the ruler and the thousandth scale at the edge of the clamping groove, the precise measurement of the wear offset of the inner hole center of the guide sleeve, the eccentricity of the inner hole center in a single direction and the eccentricity of the inner hole center of the guide sleeve relative to the outer circle is realized, more evaluation data is obtained, the diversity of data and the convenience of measurement are improved, so that the staff can comprehensively evaluate the wear condition of the guide sleeve.

[0039] Through the technical personnel in the art, all electrical components in the case are connected with the power supply matched therewith through wires, and appropriate controllers and encoders should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should be completed according to the working order between the electrical components in the working principle described below. The detailed connection means is a well-known technology in the art. The working principle and process are mainly introduced below, and the electrical control is not described.

[0040] By Figures 1 to 6It can be known that the guide sleeve inner diameter and wear amount measuring device comprises a guide sleeve 1 for guiding the steel round bar, an inner hole 2 in the form of a cylinder is arranged inside the guide sleeve 1, a hole diameter gauge 3 is penetrated through the inside of the inner hole 2, a conical surface section 17 is arranged on the outer wall of the hole diameter gauge 3, the conical surface section 17 is in clearance fit with the inner hole 2, a small head cylinder section 4 is arranged at the bottom of the conical surface section 17 of the hole diameter gauge 3, a large head cylinder section 5 is arranged at the top of the conical surface section 17 of the hole diameter gauge 3, a first scale 6 is equidistantly arranged on the outer wall of the conical surface section 17, a distance measuring micrometer 7 is arranged on one side of the top of the guide sleeve 1, a clamping sleeve 9 (see Figure 3 ) is arranged outside the guide sleeve 1, the clamping sleeve 9 is connected with the guide sleeve 1 in a matched mode, a clamping groove 10 is arranged inside the clamping sleeve 9, a ruler 8 is movably connected with the inner wall of the clamping groove 10, the ruler 8 is connected with the conical surface section 17 in a matched mode, a second scale 11 (see Figure 5 ) is arranged on the upper and lower sides of the two side faces of the ruler 8, and a third scale 12 is arranged on the outer wall of the clamping sleeve 9.

[0041] The embodiment also provides a measuring method using the guide sleeve inner diameter and wear amount measuring device, the method comprising: the guide sleeve 1 is used for guiding the steel round bar, the outer circle and the inner hole 2 are both cylindrical surfaces, the inner hole 2 is matched with the detected round bar specification to keep the circumferential uniform gap, and is used for guiding the steel round bar, the cooperation between the hole gauge 3, the small head cylindrical surface section 4, the big head cylindrical surface section 5, the first scale 6 and the conical surface section 17 constitutes the main structure of the hole gauge 3, both ends of the hole gauge 3 are cylindrical surfaces, the middle part is a conical surface, and according to the round bar specification range detected by the ultrasonic equipment, the diameter of the small head cylindrical surface section 4 is smaller than the lower limit of the detected specification, the diameter of the big head cylindrical surface section 5 is larger than the upper limit of the detected specification, the conical surface section 17 has a certain length, and the first scale 6 is equidistantly marked at four positions, the scale reading value corresponds to the round diameter of the position, the hole gauge 3 is inserted into the inner hole 2 of the guide sleeve 1 through the cooperation between the guide sleeve 1, the inner hole 2, the hole gauge 3, the small head cylindrical surface section 4, the big head cylindrical surface section 5, the first scale 6 and the conical surface section 17, the bottom surface of the hole gauge 3 is swung to be parallel to the end surface of the guide sleeve 1, the scale reading of the contact position between the hole gauge 3 and the inner hole 2 is read to realize the measurement of the inner diameter of the guide sleeve 1, the cooperation between the distance measuring micrometer 7, the ruler 8, the clamping sleeve 9, the clamping groove 10, the second scale 11 and the third scale 12 constitutes the main structure of the distance measuring micrometer 7, the ruler 8 is passed through the clamping groove 10 of the clamping sleeve 9, one end of the ruler 8 is beveled, the angle of the bevel is consistent with the angle of the conical surface section 17 of the hole gauge 3, the close fit between the ruler 8 and the conical surface section 17 is ensured, and the ruler 8 and the clamping sleeve 9 are both provided with length scales, wherein the clamping sleeve 9 is provided with a micrometer scale at the lower edge of the clamping groove 10, the distance between the hole gauge 3 and the outer circle of the guide sleeve 1 is measured from the circumferentially equidistant four positions by the cooperation between the guide sleeve 1, the inner hole 2, the hole gauge 3, the small head cylindrical surface section 4, the big head cylindrical surface section 5, the first scale 6, the distance measuring micrometer 7, the ruler 8, the clamping sleeve 9, the clamping groove 10, the second scale 11, the third scale 12 and the conical surface section 17, the clamping sleeve 9 is tightly attached to the outer circle of the guide sleeve 1, the bottom surface of the ruler 8 is tightly attached to the end surface of the guide sleeve 1, the ruler 8 is moved to make the beveled end tightly attached to the conical surface section 17 of the hole gauge 3, the length value is read through the scale of the ruler 8 and the micrometer scale of the clamping groove 10 to realize the measurement of the center wear offset of the inner hole 2 of the guide sleeve 1, the length value is read in the opposite position on the same straight line by the same method, the half of the difference between the length values of the two positions on the same straight line is the eccentricity of the center of the inner hole 2 in this direction, the eccentricity of the other direction perpendicular to this direction is obtained by the same method, the square root of the square sum of the eccentricities of the two directions is the eccentricity of the center of the inner hole 2 of the guide sleeve 1 relative to the outer circle, the above method is used to measure the end surface of the guide sleeve 1 close to the big head side of the hole gauge 3, the ruler 8 is turned over to the other surface of the guide sleeve 1, and the other end surface of the guide sleeve 1 is measured by the same method,The cooperation between the aperture gauge 3, the small-head cylindrical segment 4, the large-head cylindrical segment 5, the first scale 6, the distance micrometer 7, the ruler 8, the sleeve 9, the clamping groove 10, the second scale 11, the third scale 12 and the conical segment 17, the insertion of the aperture gauge 3 into the inner hole 2 of the guide sleeve 1, the reading of the scale at the contact position of the aperture gauge 3 and the inner hole 2, the measurement of the inner diameter of the guide sleeve 1, the measurement of the distance between the outer wall of the aperture gauge 3 and the outer circle of the guide sleeve 1 from the circumferentially distributed four directions by using the distance micrometer 7, the reading of the length value by the scale of the ruler 8 and the thousandth scale at the edge of the clamping groove 10, the accurate measurement of the wear offset of the center of the inner hole 2 of the guide sleeve 1, the eccentricity of the center of the inner hole 2 in a single direction and the eccentricity of the center of the inner hole 2 of the guide sleeve 1 relative to the outer circle, and the acquisition of more evaluation data, the improvement of the diversity of data and the convenience of measurement, so as to comprehensively evaluate the wear condition of the guide sleeve 1.

[0042] It can be understood that the measurement method can be applied to the measurement and performance evaluation of the wear condition of the in-use guide sleeve for small-specification bar eddy current detection, magnetic flux leakage detection and the like, and can also be applied to the measurement and performance evaluation of the wear condition of the guide hole of the wire rod and bar rolling.

[0043] Further, one side of the aperture gauge 3 is provided with a needle gauge 13, which is connected with the inner hole 2 and the aperture gauge 3 in cooperation, and the outer wall of the needle gauge 13 is provided with a fourth scale 14.

[0044] The measurement method of the guide sleeve inner diameter and wear amount measuring device is also provided, which comprises the cooperation between the guide sleeve 1, the inner hole 2, the aperture gauge 3, the needle gauge 13 and the fourth scale 14, the outer shape of the needle gauge 13 is a small-angle conical surface, the fourth scale 14 is arranged on the conical surface in the axial direction, the scale value corresponds to the diameter of the position, the aperture gauge 3 is kept stationary according to the guide sleeve inner hole diameter measurement method, the wear gap between the aperture gauge 3 and the inner hole 2 is observed from the circumference, the needle gauge 13 is inserted into the wear gap between the aperture gauge 3 and the inner hole 2 in each wear direction, the maximum wear depth of the position is read according to the scale at the contact position of the needle gauge 13 and the inner hole 2 of the guide sleeve 1, the wear uniformity deviation of the inner hole 2 of the guide sleeve 1 is measured, the wear amount of each direction of the inner hole 2 of the guide sleeve 1 is measured, and the compliance of the performance of the guide sleeve 1 is determined, the guide sleeve 1 meeting the standard requirements can be continuously used and the corresponding aperture mark can be modified, and the guide sleeve 1 not meeting the requirements can be removed or the inner diameter can be reamed for use of larger-specification steel round bars.

[0045] Further, the sleeve 9 is fixedly connected with an arc-shaped ruler 15 at the bottom of the side close to the guide sleeve 1, and the arc-shaped ruler 15 is connected with the guide sleeve 1 in cooperation.

[0046] The embodiment also provides a measuring method of the guide sleeve inner diameter and wear amount measuring device, which comprises the following steps: through the cooperation between the guide sleeve 1, the sleeve 9 and the arc ruler 15, the arc ruler 15 is arranged at the bottom of the sleeve 9, and the curvature of the arc ruler 15 matches the surface curvature of the outer circle of the guide sleeve 1, so that the sleeve 9 and the arc ruler 15 can be closely attached to the outer wall of the guide sleeve 1, the measurement error caused by the small gap is reduced, and the accuracy of length measurement is improved.

[0047] Further, the top of the sleeve 9 is threadedly connected with the jacking bolt 16, and the jacking bolt 16 is connected with the ruler 8.

[0048] The embodiment also provides a measuring method of the guide sleeve inner diameter and wear amount measuring device, which comprises the following steps: through the cooperation between the guide sleeve 1, the sleeve 9 and the arc ruler 15, the arc ruler 15 is arranged at the bottom of the sleeve 9, and the curvature of the arc ruler 15 matches the surface curvature of the outer circle of the guide sleeve 1, so that the sleeve 9 and the arc ruler 15 can be closely attached to the outer wall of the guide sleeve 1, the measurement error caused by the small gap is reduced, and the accuracy of length measurement is improved.

[0049] Further, the outer wall of the jacking bolt 16 is provided with the anti-skid lines 18, which are used to improve the surface friction of the knob end of the jacking bolt 16, so that the staff can stably and accurately rotate the jacking bolt 16.

[0050] In the specific implementation process, it is particularly pointed out that the anti-skid lines 18 are used to improve the surface friction of the knob end of the jacking bolt 16, so that the staff can stably and accurately rotate the jacking bolt 16.

[0051] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A device for measuring the inner diameter and wear of a bushing (1), characterized in that: The inner hole (2) is provided with a hole gauge (3) penetrating through the inside, the outer wall of the hole gauge (3) is provided with a taper section (17), the taper section (17) is gap matched with the inner hole (2), the bottom of the taper section (17) is provided with a small head cylindrical section (4), the top of the taper section (17) is provided with a big head cylindrical section (5), the outer wall of the taper section (17) is equidistantly provided with a first scale (6), one side of the top of the guide sleeve (1) is provided with a distance measuring micrometer (7), the distance measuring micrometer (7) is provided with a clamping sleeve (9) on the outside of the guide sleeve (1), the clamping sleeve (9) is connected with the guide sleeve (1), the inner hole of the clamping sleeve (9) is provided with a clamping groove (10), the inner wall of the clamping groove (10) is movably connected with a ruler (8), the ruler (8) is connected with the taper section (17), the upper and lower sides of the two sides of the ruler (8) are provided with a second scale (11), the outer wall of the clamping sleeve (9) is provided with a third scale (12); One side of the hole gauge (3) is provided with a needle gauge (13), the needle gauge (13) is connected with the inner hole (2) and the hole gauge (3) respectively, the outer wall of the needle gauge (13) is provided with a fourth scale (14); The clamping sleeve (9) is fixedly connected with an arc supporting ruler (15) on one side of the bottom close to the guide sleeve (1), the arc supporting ruler (15) is connected with the guide sleeve (1); The outer circle of the guide sleeve (1) and the inner hole (2) are both cylindrical surfaces, the inner hole (2) is gap matched with the steel round bar in the circumferential direction, and the steel round bar is guided; One end of the ruler (8) is beveled, and the angle of the bevel is consistent with the taper angle of the taper section (17) of the hole gauge (3).

2. The bushing inside diameter and wear measurement device of claim 1, wherein: The top of the clamping sleeve (9) is threadedly connected with a tightening bolt (16), and the tightening bolt (16) is connected with the ruler (8).

3. The bushing inside diameter and wear measurement device of claim 2, wherein: The outer wall of the tightening bolt (16) is provided with anti-skid lines (18).

4. The bushing inside diameter and wear measurement device of claim 1, wherein: The diameter of the small head cylindrical section (4) is smaller than the lower limit of the detection specification, and the diameter of the big head cylindrical section (5) is larger than the upper limit of the detection specification.

5. A method for measuring the inner diameter of a bushing and the amount of wear, characterized by: The method adopts the guide sleeve inner diameter and wear amount measuring device of claim 1, and the method comprises: The hole gauge (3) is inserted into the inner hole (2) of the guide sleeve (1), the bottom surface of the hole gauge (3) is swung to be parallel to the end surface of the guide sleeve (1), the scale of the contact position of the hole gauge (3) and the inner hole (2) is read, and the inner diameter of the guide sleeve (1) is measured.

6. The bush inner diameter and wear amount measuring method according to claim 5, characterized by: The method further comprises: The distance between the aperture gauge (3) and the outer circle of the guide sleeve (1) is measured from four equidistant directions by using a range micrometer (7). The sleeve (9) is tightly attached to the outer circle of the guide sleeve (1), and the bottom surface of the ruler (8) is tightly attached to the end surface of the guide sleeve (1). The end with the bevel of the ruler (8) is tightly attached to the conical surface section (17) of the aperture gauge (3). The length value is read through the scale of the ruler (8) and the thousandth scale of the edge of the clamping groove (10), so as to realize the measurement of the center wear deviation of the inner hole (2) of the guide sleeve (1).

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