Device and method for measuring inner diameter and abrasion loss of guide sleeve

Abstract

The invention provides a device and a method for measuring the inner diameter and the abrasion loss of a guide sleeve, and relates to the technical field of material detection. The device comprises a guide sleeve, an inner hole is formed in the guide sleeve, an aperture gauge penetrates through the inner hole, a conical surface section is arranged on the outer wall of the aperture gauge, the conical surface section is in clearance fit with the inner hole, a small-head cylindrical surface section is arranged at the bottom of the conical surface section of the aperture gauge, and a large-head cylindrical surface section is arranged at the top of the conical surface section of the aperture gauge. First scales are arranged on the outer wall of the conical surface section at equal intervals. The invention relates to the technical field of material detection, and solves the problems that in the prior art, abrasion conditions of an inner hole of a guide sleeve are diversified, a vernier caliper is used for measuring the hole diameter and measuring the distance between the inner hole wall and the outer cylindrical surface of the guide sleeve, shape and position change measurement after the inner hole of the guide sleeve is abraded is not accurate enough, and abrasion differences and hole center change conditions in all directions are difficult to measure. Therefore, the problem of difficulty in comprehensive evaluation of the conformity of the guide sleeve is solved.

Description

Technical Field

[0001] The invention relates to the technical field of material detection, and in particular to a device and method for measuring the inner diameter and wear amount of a guide sleeve. Background Art

[0002] Special steel round bars are usually subjected to internal ultrasonic testing before leaving the factory to eliminate round bars that do not meet the internal quality standards. Local water immersion automatic ultrasonic testing is commonly used for ultrasonic testing of batch round bars. During the test, the round bar directly passes through the ultrasonic equipment cavity, and the ultrasonic field rotates around the central axis of the cavity to achieve a spiral scan of the round bar. The space between the ultrasonic probe and the round bar is filled with coupling water, and the ultrasonic wave is incident into the round bar through the coupling water. The instrument determines the internal quality of the round bar based on the ultrasonic echo signal in the round bar.

[0003] In order to ensure the reliability of the detection, the round rod is required to maintain good dynamic coaxiality with the center of the ultrasonic field cavity. To this end, one or two guide sleeves with sufficient thickness are respectively installed at the entrance and exit of the ultrasonic equipment before the test. Multiple guide sleeves are combined to form a steel guide device for detection, and at the same time prevent the round rod with an out-of-tolerance shape 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 rod and the coupling water. The outer circle and inner hole of the guide sleeve are both cylindrical, and the inner hole of the guide sleeve matches the specifications of the round rod to be tested with a uniform circumferential gap. The round rods have various specifications and the number of guide sleeves is large.

[0004] In actual testing, the inner hole surface of the guide sleeve is often scratched and worn by the round rod. When the circumferential uneven wear exceeds a certain range, the stability of the coupling water layer deteriorates, which seriously affects the reliability of the test. Due to the high reliability requirements of ultrasonic testing, the uniformity control and measurement of the inner hole wear of the guide sleeve is very important. Based on this, the wear of the inner hole of the guide sleeve needs to be measured and marked regularly.

[0005] In the prior art, the wear conditions of the inner hole of the guide sleeve vary. A vernier caliper is used to measure the hole diameter, and at the same time, the distance from the inner hole wall of the guide sleeve to the outer cylindrical surface is measured. The measurement of the shape and position changes of the inner hole of the guide sleeve after wear is not accurate enough, and it is difficult to determine the wear differences in various directions and the changes in the center of the hole, resulting in deviations in the measurement results, making it difficult to comprehensively evaluate the compliance of the guide sleeve. Summary of the invention

[0006] The purpose of the present invention includes providing a device and method for measuring the inner diameter and wear of a guide sleeve, which solves the problem in the prior art that the inner hole of the guide sleeve has various wear conditions, a 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 at the same time, and the measurement of the shape and position changes of the inner hole of the guide sleeve after wear is not accurate enough, and it is difficult to determine the wear differences in various directions and the changes in the center of the hole, resulting in deviations in the measurement results and difficulty in comprehensively evaluating the compliance of the guide sleeve.

[0007] The embodiments of the present invention can be implemented as follows:

[0008] In a first aspect, the present invention provides a device for measuring the inner diameter and wear of a guide sleeve, comprising a guide sleeve, an inner hole being arranged inside the guide sleeve, an aperture gauge passing through the inner hole, a conical surface section being arranged on the outer wall of the aperture gauge, the conical surface section being matched with the inner hole clearance, a small-head cylindrical surface section being arranged at the bottom of the conical surface section of the aperture gauge, a large-head cylindrical surface section being arranged at the top of the conical surface section of the aperture gauge, a first scale being arranged equidistantly on the outer wall of the conical surface section, a distance measuring micrometer being arranged on one side of the top of the guide sleeve, a ferrule being arranged on the outer side of the distance measuring micrometer, the ferrule being matched with the guide sleeve, a slot being arranged inside the ferrule, a ruler being movably connected to the inner wall of the slot, the ruler being matched with the conical surface section, second scales being arranged on the upper and lower sides of both sides of the ruler, and a third scale being arranged on the outer wall of the ferrule.

[0009] In an optional embodiment, a needle ruler is provided on one side of the aperture gauge, the needle ruler is respectively connected with the inner hole and the aperture gauge, and the outer wall of the needle ruler is provided with a fourth scale.

[0010] In an optional embodiment, a curved ruler is fixedly connected to the bottom of the side close to the ferrule, and the curved ruler is cooperatively connected to the guide sleeve.

[0011] In an optional embodiment, the top thread of the ferrule is connected with a tightening bolt, and the tightening bolt is cooperatively connected with a ruler.

[0012] In an optional embodiment, the outer wall of the tightening bolt is provided with anti-slip grooves.

[0013] In an optional embodiment, the outer circle and the inner hole are both cylindrical surfaces, and the inner hole and the inspected steel round rod are matched with a circumferentially uniform gap to guide the steel round rod.

[0014] In an optional embodiment, the diameter of the small-head cylindrical segment is smaller than the lower limit of the detection specification, and the diameter of the large-head cylindrical segment is larger than the upper limit of the detection specification.

[0015] In an optional embodiment, one end of the ruler is beveled, and the angle of the bevel is consistent with the bevel angle of the conical surface section of the aperture gauge.

[0016] In a second aspect, the present invention provides a method for measuring the inner diameter and wear amount of a guide sleeve, the method using the device for measuring the inner diameter and wear amount of a guide sleeve of the aforementioned embodiment, the method comprising:

[0017] Insert the bore gauge into the inner hole, swing the bottom surface of the bore gauge parallel to the end surface, and read the scale at the contact position between the bore gauge and the inner hole to measure the inner diameter.

[0018] In an optional embodiment, the method further comprises:

[0019] Use a distance measuring micrometer to measure the distance between the outer circle of the aperture gauge and the guide sleeve from four circumferentially evenly distributed positions. Place the ferrule close to the outer circle of the guide sleeve and at the same time make the bottom surface of the ruler close to the end surface of the guide sleeve. Move the ruler so that the end with the bevel is in close contact with the conical surface section of the aperture gauge. Read the length value through the scale of the ruler and the micrometer scale on the edge of the slot to achieve the measurement of the wear offset of the inner hole center of the guide sleeve.

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

[0021] Through the coordination of the aperture gauge, the small-head cylindrical segment, the large-head cylindrical segment, the first scale, the distance measuring micrometer, the ruler, the ferrule, the slot, the second scale, the third scale, etc., the inner diameter of the guide sleeve can be measured by inserting the aperture gauge into the inner hole of the guide sleeve and reading the scale of the contact position between the aperture gauge and the inner hole. Then, the distance between the outer wall of the aperture gauge and the outer circle of the guide sleeve is measured from four circumferentially evenly distributed directions using the distance measuring micrometer. The length value is read through the scale of the ruler and the micrometer scale of the slot edge. 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 can be accurately measured, thereby obtaining more evaluation data, improving the diversity of data and the convenience of measurement, which is convenient for the staff to conduct a comprehensive evaluation of the wear of the guide sleeve.

[0022] Through the coordination among the guide sleeve, inner hole, aperture gauge, needle ruler and the fourth scale, according to the guide sleeve inner hole diameter measurement method, keep the aperture gauge stationary, observe the guide sleeve inner diameter wear gap from the circumference, insert the needle ruler into the wear gap between the inner hole and the aperture gauge at each wear direction, read the maximum wear depth of the part according to the scale of the contact position between the needle ruler and the guide sleeve inner hole, measure the deviation of the wear uniformity of the guide sleeve inner hole, thereby measuring the wear amount of the guide sleeve inner hole in various directions, and the compliance of the guide sleeve performance can be determined accordingly. The guide sleeve that meets the standard requirements can continue to be used and the corresponding aperture mark can be modified. The guide sleeve that does not meet the requirements can be discarded or the inner diameter can be expanded to allow the use of larger specification steel round bars. This helps to improve the utilization efficiency of resources and the flexibility of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the structure of a device for measuring the inner diameter and wear amount of a guide sleeve provided by the present invention;

[0025] Figure 2 A top view of the structure of the device for measuring the inner diameter and wear amount of the guide sleeve provided by the present invention;

[0026] Figure 3 It is a side view of the structure of the ruler, the ferrule and the tightening bolt in the present invention;

[0027] Figure 4 for Figure 1 A partial enlarged view of the middle A area;

[0028] Figure 5 for Figure 1 A partial enlarged view of the middle B area;

[0029] Figure 6 for Figure 2 A partial enlarged view of the middle C area.

[0030] Icons: 1. Guide sleeve; 2. Inner hole; 3. Aperture gauge; 4. Small-head cylindrical section; 5. Large-head cylindrical section; 6. First scale; 7. Distance micrometer; 8. Ruler; 9. Clamping sleeve; 10. Slot; 11. Second scale; 12. Third scale; 13. Needle ruler; 14. Fourth scale; 15. Arc ruler; 16. Tightening bolt; 17. Conical section; 18. Anti-slip pattern. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention 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 invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0037] In the prior art, the wear conditions of the inner hole of the guide sleeve are various. A 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 at the same time. The measurement of the shape and position changes of the inner hole of the guide sleeve after wear is not accurate enough, and it is difficult to determine the wear differences in various directions and the changes in the center of the hole, resulting in deviations in the measurement results, making it difficult to comprehensively evaluate the compliance of the guide sleeve.

[0038] In view of this, an embodiment of the present invention provides a device for measuring the inner diameter and wear of a guide sleeve, which cooperates with a bore gauge, a small-head cylindrical segment, a large-head cylindrical segment, a first scale, a distance micrometer, a ruler, a ferrule, a slot, a second scale, a third scale, etc., and inserts the bore gauge into the inner hole of the guide sleeve, and reads the scale of the contact position between the bore gauge and the inner hole to achieve measurement of the inner diameter of the guide sleeve, and then uses the distance micrometer to measure the distance between the outer wall of the bore gauge and the outer circle of the guide sleeve from four circumferentially evenly distributed directions, and reads the length value through the scale of the ruler and the micrometer scale of the slot edge, so as to achieve accurate measurement of 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, thereby obtaining more evaluation data, improving the diversity of data and the convenience of measurement, so that the staff can conduct a comprehensive evaluation of the wear of the guide sleeve.

[0039] By those skilled in the art, all electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connections between the electrical components are completed in the order of working in sequence. The detailed connection methods are well known in the art. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0040] Depend on Figures 1 to 6It can be seen that the guide sleeve inner diameter and wear measurement device includes a guide sleeve 1, which is used to guide the steel round rod. The guide sleeve 1 is provided with a cylindrical inner hole 2, and the inner hole 2 is penetrated by an aperture gauge 3. The outer wall of the aperture gauge 3 is provided with a conical section 17, and the conical section 17 is clearance-matched with the inner hole 2. The aperture gauge 3 is provided with a small-head cylindrical section 4 at the bottom of the conical section 17, and the aperture gauge 3 is provided with a large-head cylindrical section 5 at the top of the conical section 17. The outer wall of the conical section 17 is equidistantly provided with a first scale 6, and a distance measuring micrometer 7 is provided on one side of the top of the guide sleeve 1. The distance measuring micrometer 7 is provided with a ferrule 9 on the outer side of the guide sleeve 1 (please refer to Figure 3 ), the ferrule 9 is connected with the guide sleeve 1, a ferrule 9 is provided with a slot 10, the inner wall of the slot 10 is movably connected with a ruler 8, the ruler 8 is connected with the conical surface section 17, and the upper and lower sides of the ruler 8 are provided with second scales 11 (please refer to Figure 5 ), the outer wall of the ferrule 9 is provided with a third scale 12.

[0041] The present embodiment also provides a measuring method using the above-mentioned guide sleeve inner diameter and wear measurement device, the method comprising: the guide sleeve 1 is used to guide the steel round rod, and its outer circle and inner hole 2 are both cylindrical, the inner hole 2 maintains a circumferentially uniform gap matching with the specifications of the round rod to be inspected, and is used to guide the steel round rod, and the main structure of the aperture gauge 3 is composed of the coordination between the aperture gauge 3, the small-head cylindrical segment 4, the large-head cylindrical segment 5, the first scale 6 and the conical segment 17, the two ends of the aperture gauge 3 are both cylindrical, and the middle is conical, and according to the specification range of the round rod detected by the ultrasonic equipment, the diameter of the small-head cylindrical segment 4 is less than the lower limit of the detection specification, and the diameter of the large-head cylindrical segment 5 is greater than the upper limit of the detection specification, and the conical segment 17 has a certain length, and four directions are equidistantly marked There is a first scale 6, and the scale reading value corresponds to the diameter of the circle at the position. Through the cooperation among the guide sleeve 1, the inner hole 2, the aperture gauge 3, the small-head cylindrical segment 4, the large-head cylindrical segment 5, the first scale 6 and the conical segment 17, the aperture gauge 3 is inserted into the inner hole 2 of the guide sleeve 1, and the bottom surface of the swing aperture gauge 3 is parallel to the end surface of the guide sleeve 1. By reading the scale of the contact position between the aperture gauge 3 and the inner hole 2, the inner diameter of the guide sleeve 1 is measured. Through the cooperation among the ranging micrometer 7, the ruler 8, the ferrule 9, the slot 10, the second scale 11 and the third scale 12, the main structure of the ranging micrometer 7 is formed. The ruler 8 passes through the slot 10 of the ferrule 9. One end of the ruler 8 is an oblique opening, and the angle of the oblique opening is consistent with the conical surface of the aperture gauge 3. The bevel angles of the segments 17 are consistent to ensure that the ruler 8 fits tightly with the tapered segment 17. The ruler 8 and the ferrule 9 are both provided with length scales, wherein the ferrule 9 is located at the lower edge of the slot 10 for the micrometer scale. Through the coordination among the guide sleeve 1, the inner hole 2, the aperture gauge 3, the small-head cylindrical segment 4, the large-head cylindrical segment 5, the first scale 6, the distance measuring micrometer 7, the ruler 8, the ferrule 9, the slot 10, the second scale 11, the third scale 12 and the tapered segment 17, the distance between the aperture gauge 3 and the outer circle of the guide sleeve 1 is measured from four circumferentially evenly distributed directions with the distance measuring micrometer 7, the ferrule 9 is pressed against the outer circle of the guide sleeve 1, and at the same time, the bottom surface of the ruler 8 is pressed against the end surface of the guide sleeve 1, and the ruler 8 is moved so that the end with the bevel is aligned with the tapered segment of the aperture gauge 3. 17 are closely attached to each other, and the length value is read through the scale of the ruler 8 and the thousandth scale on the edge of the card slot 10 to realize the measurement of the wear offset of the center of the inner hole 2 of the guide sleeve 1. In the same way, the length value is measured and read at the opposite direction of the same straight line. Half of the difference between the length values ​​of the two directions in the same straight line is the eccentricity of the center of the inner hole 2 in this direction. In the same way, the eccentricity in the other direction perpendicular to the direction is obtained. The square root of the sum of the squares of the eccentricities in 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 to measure the end face of the guide sleeve 1 close to the large end of the aperture gauge 3. After turning the ruler 8 to the other side of the guide sleeve 1, the same method can be used to measure the other end face of the guide sleeve 1.Through the coordination among 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 ferrule 9, the slot 10, the second scale 11, the third scale 12 and the conical segment 17, the aperture gauge 3 is inserted into the inner hole 2 of the guide sleeve 1, and the scale at the contact position between the aperture gauge 3 and the inner hole 2 is read to measure the inner diameter of the guide sleeve 1, and then the distance between the outer wall of the aperture gauge 3 and the outer circle of the guide sleeve 1 is measured from four circumferentially evenly distributed directions using the distance micrometer 7, and the length value is read through the scale of the ruler 8 and the micrometer scale on the edge of the slot 10, so as to accurately measure 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, so as to obtain more evaluation data, improve the diversity of data and the convenience of measurement, so that the staff can make a comprehensive evaluation of the wear of the guide sleeve 1.

[0042] It can be understood that this measurement method can be applied to the measurement and performance evaluation of the wear of guide sleeves in use for eddy current detection and magnetic leakage detection of small-sized bars, and can also be used for the measurement and performance evaluation of the wear of the inner hole of the guide for rolling wire and bar.

[0043] Furthermore, a needle ruler 13 is provided on one side of the aperture gauge 3 , and the needle ruler 13 is respectively connected with the inner hole 2 and the aperture gauge 3 , and a fourth scale 14 is provided on the outer wall of the needle ruler 13 .

[0044] The present embodiment also provides a measuring method using the above-mentioned guide sleeve inner diameter and wear measurement device, the method comprising: through the cooperation between the guide sleeve 1, the inner hole 2, the aperture gauge 3, the needle ruler 13 and the fourth scale 14, the outer shape of the needle ruler 13 is a small-angle cone, and the fourth scale 14 is arranged in the axial direction of the cone, and the scale value corresponds to the diameter of the position, according to the diameter measurement method of the inner hole 2 of the guide sleeve 1, the aperture gauge 3 is kept stationary, and the inner diameter wear clearance of the guide sleeve 1 is observed from the circumference, and the needle ruler 13 is inserted in each wear position. The wear gap between the inner hole 2 and the aperture gauge 3 is entered, and the maximum wear depth of the part is read according to the scale of the contact position between the needle ruler 13 and the inner hole 2 of the guide sleeve 1, so as to measure the wear uniformity deviation of the inner hole 2 of the guide sleeve 1, and measure the wear amount of the inner hole 2 of the guide sleeve 1 in all directions, thereby judging the compliance of the use performance of the guide sleeve 1. The guide sleeve 1 that meets the standard requirements can continue to be used and the corresponding aperture mark can be modified. The guide sleeve 1 that does not meet the requirements shall be discarded or the inner diameter shall be expanded so that a larger specification steel round bar can be used.

[0045] Furthermore, an arc-shaped ruler 15 is fixedly connected to the bottom of one side of the clamping sleeve 9 close to the guide sleeve 1 , and the arc-shaped ruler 15 is cooperatively connected with the guide sleeve 1 .

[0046] The present embodiment also provides a measuring method using the above-mentioned guide sleeve inner diameter and wear measurement device, the method comprising: through the cooperation between the guide sleeve 1, the ferrule 9 and the arc-shaped ruler 15, by arranging the arc-shaped ruler 15 at the bottom of the ferrule 9, and the curvature of the arc-shaped ruler 15 matches the surface curvature of the outer circle of the guide sleeve 1, so that the ferrule 9 and the arc-shaped ruler 15 can fit tightly with the outer wall of the guide sleeve 1, reduce the measurement error caused by the small gap, and improve the accuracy of the length measurement.

[0047] Furthermore, a top thread of the ferrule 9 is connected with a tightening bolt 16 , and the tightening bolt 16 is connected with the ruler 8 in cooperation.

[0048] The present embodiment also provides a measuring method using the above-mentioned guide sleeve inner diameter and wear measurement device, the method comprising: through the cooperation between the distance measuring micrometer 7, the ruler 8, the ferrule 9 and the tightening bolt 16, when using the distance measuring micrometer 7 for measurement, the oblique mouth of the ruler 8 is fitted with the conical surface of the aperture gauge 3, and after the ferrule 9 is fitted with the outer wall of the guide sleeve 1, the tightening bolt 16 is rotated to tighten and fix the ruler 8 in the ferrule 9, thereby preventing the ruler 8 from sliding in the ferrule 9 and improving the accuracy of data reading.

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

[0050] In the specific implementation process, it is worth pointing out that the anti-slip pattern 18 is used to increase the surface friction of the knob end of the jacking bolt 16 so that the staff can rotate the jacking bolt 16 stably and accurately.

[0051] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A device for measuring the inner diameter and wear of a guide sleeve, comprising a guide sleeve (1), characterized in that: The guide sleeve (1) is provided with an inner hole (2), the inner hole (2) is penetrated by an aperture gauge (3), the outer wall of the aperture gauge (3) is provided with a conical surface section (17), the conical surface section (17) and the inner hole (2) are clearance-matched, the aperture gauge (3) is provided with a small-head cylindrical surface section (4) at the bottom of the conical surface section (17), the aperture gauge (3) is provided with a large-head cylindrical surface section (5) at the top of the conical surface section (17), the outer wall of the conical surface section (17) is equidistantly provided with first scales (6), and the guide sleeve ( A distance measuring micrometer (7) is arranged on one side of the top of the guide sleeve (1), the distance measuring micrometer (7) is arranged on the outer side of the guide sleeve (1), the guide sleeve (9) is connected with the guide sleeve (1), a slot (10) is arranged inside the slot (9), a ruler (8) is movably connected to the inner wall of the slot (10), the ruler (8) is connected with the conical surface section (17), the upper and lower sides of the ruler (8) are provided with second scales (11), and the outer wall of the slot (9) is provided with a third scale (12).

2. The guide sleeve inner diameter and wear amount measuring device according to claim 1, characterized in that: A needle ruler (13) is provided on one side of the aperture gauge (3), and the needle ruler (13) is respectively connected to the inner hole (2) and the aperture gauge (3), and a fourth scale (14) is provided on the outer wall of the needle ruler (13).

3. The guide sleeve inner diameter and wear amount measuring device according to claim 1, characterized in that: An arc-shaped ruler (15) is fixedly connected to the bottom of one side of the clamping sleeve (9) close to the guide sleeve (1), and the arc-shaped ruler (15) is cooperatively connected to the guide sleeve (1).

4. The guide sleeve inner diameter and wear amount measuring device according to claim 1, characterized in that: The top of the clamping sleeve (9) is threadedly connected with a tightening bolt (16), and the tightening bolt (16) is cooperatively connected with the ruler (8).

5. The guide sleeve inner diameter and wear amount measuring device according to claim 4, characterized in that: The outer wall of the tightening bolt (16) is provided with anti-slip grooves (18).

6. The guide sleeve inner diameter and wear amount measuring device according to claim 1, characterized in that: The outer circle of the guide sleeve (1) and the inner hole (2) are both cylindrical surfaces, and the inner hole (2) matches the steel round bar to be inspected with a uniform circumferential gap, so as to guide the steel round bar.

7. The guide sleeve inner diameter and wear amount measuring device according to claim 6, characterized in that: The diameter of the small-head cylindrical segment (4) is smaller than the lower limit of the detection specification, and the diameter of the large-head cylindrical segment (5) is larger than the upper limit of the detection specification.

8. The guide sleeve inner diameter and wear amount measuring device according to claim 1, characterized in that: One end of the ruler (8) is beveled, and the angle of the beveled opening is consistent with the bevel angle of the conical surface section (17) of the aperture gauge (3).

9. A method for measuring the inner diameter and wear of a guide sleeve, characterized in that: The method adopts the guide sleeve inner diameter and wear amount measuring device according to claim 1, and the method comprises: Insert a bore gauge (3) into the inner hole (2) of the guide sleeve (1), swing the bottom surface of the bore gauge (3) parallel to the end surface of the guide sleeve (1), and read the scale of the contact position between the bore gauge (3) and the inner hole (2) to measure the inner diameter of the guide sleeve (1).

10. The method for measuring the inner diameter and wear amount of a guide sleeve according to claim 9, characterized in that: The method further comprises: The distance between the aperture gauge (3) and the outer circle of the guide sleeve (1) is measured from four circumferentially evenly distributed directions using a distance measuring micrometer (7). The ferrule (9) is placed in close contact with the outer circle of the guide sleeve (1). At the same time, the bottom surface of the ruler (8) is placed in close contact with the end surface of the guide sleeve (1). The ruler (8) is moved so that the end with the bevel is in close contact with the conical surface section (17) of the aperture gauge (3). The length value is read through the scale of the ruler (8) and the micrometer scale on the edge of the slot (10), thereby realizing the measurement of the center wear offset of the inner hole (2) of the guide sleeve (1).

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