A small-diameter deep-hole inner annular groove detection assembly

Abstract

This utility model relates to the field of inspection fixtures for machined parts, specifically to an inspection component for annular grooves inside small-diameter deep holes. It consists of a split-type positioning sleeve and a measuring pin. The split-type positioning sleeve includes a cylindrical body, which is a cylindrical tube with symmetrically cut axial planes on both sides. The cylindrical body is divided into two symmetrically arranged positioning plates, each with an arc-shaped cross-section. The lower outer surface of each positioning plate is surrounded by a measuring step that matches the annular groove. The measuring pin has two cylindrical pins, one end being a through end and the other a stop end. The through end corresponds to the minimum diameter required for the annular groove, and the stop end corresponds to the maximum diameter required for the annular groove. This utility model, through the combination of the split-type positioning sleeve and the measuring pin, achieves rapid and accurate detection of the diameter of annular grooves inside small-diameter deep holes.

Description

Technical Field

[0001] This utility model relates to the field of inspection fixtures for machined parts, specifically to an inspection component for an annular groove inside a small-diameter deep hole. Background Technology

[0002] In the field of mechanical manufacturing, especially in the processing of automotive parts, the steering knuckle shaft features a through-hole at its center and a small-diameter countersunk hole at its end, within which an annular groove is machined. The dimensional accuracy of this annular groove is crucial to product performance. However, due to its location within a small-diameter deep hole and its relatively small size (e.g., a groove diameter of φ18.9 and a width of 2.2), traditional inspection methods struggle to accurately measure its diameter. Existing inspection methods typically rely on complex measuring equipment or optical inspection techniques, but these methods are not only costly but also cumbersome to operate, making it difficult to complete inspection tasks quickly and accurately on the production floor.

[0003] Therefore, there is an urgent need for a simple, efficient, and high-precision tool for detecting annular grooves in small-diameter deep holes to meet the rapid detection needs of production sites. Utility Model Content

[0004] This invention addresses the technical problems existing in the prior art by providing a small-diameter deep hole annular groove detection component, which can simply, efficiently, and with high precision detect the diameter of the annular groove.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A detection component for annular grooves in small-diameter deep holes, comprising a split positioning sleeve and a measuring pin, wherein the split positioning sleeve includes a cylindrical body, the cylindrical body being a cylindrical body with symmetrically cut axial planes on both sides, the cylindrical body being divided into two symmetrically arranged positioning plates, the cross-section of the positioning plates being arc-shaped, and the outer surface of the lower end of the positioning plates being surrounded by a measuring step that matches the annular groove, the distance from the center of the cylindrical body to the outermost edge of the measuring step minus the outer diameter of the cylindrical body being a first length, the measuring pin having two cylindrical pins at both ends, one end being a through end and the other end being a stop end, the sum of the diameter of the through end and the first length being the minimum diameter required for the annular groove diameter, and the sum of the diameter of the stop end and the first length being the maximum diameter required for the annular groove diameter.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the measuring step includes a mating area in the middle and interference avoidance areas at both ends. The width of the interference avoidance area is smaller than the width of the mating area. The outer edge of the mating area is an arc. The circle formed by the arc of the outer edge of the mating area and the circle formed by the arc on the outer surface of the positioning piece have the same center. The straight line length of the two ends of the outer edge of the mating area is the mating length. The mating length is greater than or equal to 1 / 3 of the standard size of the annular groove diameter.

[0008] Furthermore, the standard size of the annular groove diameter is less than 1 / 2 of the mating length.

[0009] Furthermore, the straight length of the cut of the cylindrical body is the second length, and the standard size of the annular groove diameter minus the diameter of the small hole to be measured is the third length, and the second length is greater than 1.1 times the third length.

[0010] Furthermore, the measuring pin is a three-section stepped pin, with cylindrical pins at both ends and a handheld area and an engraving marking area in the middle.

[0011] Furthermore, the measuring pin is made of high-carbon alloy steel.

[0012] Furthermore, the surface of the measuring pin has undergone quenching treatment.

[0013] The beneficial effects of this utility model are:

[0014] This invention achieves rapid and accurate detection of the diameter of annular grooves inside small-diameter deep holes through a combination of a split positioning sleeve and a measuring pin. The measuring step of the split positioning sleeve mates with the annular groove, and the go end and stop end of the measuring pin correspond to the minimum and maximum diameter dimensions of the annular groove, respectively, ensuring the accuracy of the detection results. The manufacturing process of the split positioning sleeve ensures the precision of the detection tool, while the design and material selection of the measuring pin guarantee the reliability and durability of the detection. Detecting annular grooves inside small-diameter deep holes using this assembly is simple, efficient, and highly accurate, suitable for rapid detection in production environments, and can effectively improve production efficiency and product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the detection component of this utility model during detection;

[0016] Figure 2 This is a schematic diagram of the structure of the small hole to be tested and its internal annular groove in this utility model;

[0017] Figure 3 This is a top view of the split positioning sleeve described in this utility model;

[0018] Figure 4 This is a front view of the split positioning sleeve described in this utility model;

[0019] Figure 5 This is a schematic diagram of the measuring pin described in this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Hole to be measured; 2. Annular groove; 3. Diameter of annular groove; 4. Positioning piece; 5. Mating area; 6. Interference avoidance area; 7. Second length; 8. Mating length; 9. Measuring step; 10. Through end; 11. Stop end; 12. Handheld area; 13. Engraving marking area. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0025] Example

[0026] like Figure 1 , 2 and Figure 4As shown, a detection assembly for a small-diameter deep hole annular groove comprises a split positioning sleeve and a measuring pin. The split positioning sleeve includes a cylindrical body, which is a cylindrical tube with symmetrically cut axial planes on both sides. The cylindrical body is divided into two symmetrically arranged positioning plates 4. The cross-section of the positioning plates 4 is arc-shaped. The lower outer surface of the positioning plates 4 is surrounded by a measuring step 9 that matches the annular groove 2. The distance from the center of the cylindrical body to the outermost edge of the measuring step 9 minus the outer diameter of the cylindrical body is a first length. Figure 5 As shown, the measuring pin is a three-section stepped pin, with a handheld area 12 and an engraving marking area 13 in the middle, and cylindrical pins at both ends. One end is a through end 10, and the other end is a stop end 11. The sum of the diameter of the through end 10 and the first length is the minimum diameter required for the annular groove diameter 3, and the sum of the diameter of the stop end 11 and the first length is the maximum diameter required for the annular groove diameter 3. By cooperating with the measuring step 9 of the split positioning sleeve with the annular groove 2, the through end 10 and the stop end 11 of the measuring pin correspond to the minimum and maximum diameters of the annular groove 2, respectively, ensuring the accuracy of the test results.

[0027] Specifically, such as Figure 3 As shown, the measuring step 9 includes a middle mating area 5 and two end interference avoidance areas 6. The width of the interference avoidance area 6 is smaller than the width of the mating area 5. The outer edge of the mating area 5 is an arc. The circle formed by the arc of the outer edge of the mating area 5 and the circle formed by the arc on the outer surface of the positioning piece 4 have the same center. The straight line length between the two ends of the outer edge of the mating area 5 is the mating length 8. The mating length 8 is equal to 1 / 3 of the standard size of the annular groove diameter 3, ensuring the stability of the mating between the measuring step 9 and the annular groove 2 during measurement, thereby ensuring the accuracy of the measurement. The width of the interference avoidance area 6 is smaller than the width of the mating area 5, reducing the area of ​​unnecessary regions and facilitating the insertion of the positioning piece 4 into the small hole 1 to be measured, making installation convenient.

[0028] Specifically, the cylindrical body is a cylindrical tube with symmetrical axial planes cut equally on both sides. The length of the cut straight line is the second length 7. The standard size of the annular groove diameter 3 minus the diameter of the small hole 1 to be measured is the third length. The second length 7 is greater than 1.1 times the third length, ensuring that the positioning piece 4 is easy to install and remove in the small hole 1 to be measured.

[0029] By limiting the mating length 8 and the second length 7, it is ensured that the positioning piece 4 can flexibly enter and exit the small hole 1 to be measured, which is convenient for installation and disassembly, and the stability of the mating between the measuring step 9 and the annular groove 2 is ensured during measurement, thereby ensuring the accuracy of the measurement.

[0030] In a preferred embodiment, the measuring pin is made of high-carbon alloy steel and its surface is hardened to ensure that the measuring pin has sufficient hardness and wear resistance, making it suitable for high-frequency testing tasks and extending its service life.

[0031] The manufacturing process of the split positioning sleeve is as follows: The entire piece is machined into a cylindrical shape. The measuring step 9 and the sleeve are integrally formed, ensuring that the outer edge of the measuring step 9 is an arc and concentric with the arc formed by the outer surface of the sleeve. The inner diameter of the split positioning sleeve, the outer diameter of the measuring step 9, and their coaxiality must meet design requirements. Next, wire cutting technology is used to cut symmetrically on both sides axially according to requirements, ensuring that the two positioning pieces 4 are identical after cutting.

[0032] The measurement process of this utility model is as follows: First, install the split positioning sleeve and place the two positioning pieces 4 into the small-diameter deep hole, ensuring that the measuring step 9 is engaged in the annular groove 2. Next, insert the through end 10 and the stop end 11 of the measuring pin into the split positioning sleeve respectively. If the through end 10 of the measuring pin can be inserted smoothly but the stop end 11 cannot be inserted, it indicates that the diameter 3 of the annular groove is qualified; if the through end 10 cannot be inserted, it indicates that the diameter 3 of the annular groove is too small; if the stop end 11 can be inserted, it indicates that the diameter 3 of the annular groove is too large. Finally, record whether the diameter 3 of the annular groove meets the design requirements based on the measurement results.

[0033] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the methods, systems, and devices described above are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A small-diameter deep-hole inner annular groove detection assembly, characterized in that, Composed of a split positioning sleeve and a measuring pin, the split positioning sleeve includes a cylindrical body, which is a cylindrical tube with symmetrical axial planes cut equally on both sides. The cylindrical body is divided into two symmetrically arranged positioning plates, each with an arc-shaped cross-section. The lower outer surface of each positioning plate is surrounded by a measuring step that matches the annular groove. The distance from the center of the cylindrical body to the outermost edge of the measuring step minus the outer diameter of the cylindrical body is a first length. The measuring pin has two cylindrical pins, one end being a through end and the other end being a stop end. The sum of the diameter of the through end and the first length is the minimum diameter required for the annular groove, and the sum of the diameter of the stop end and the first length is the maximum diameter required for the annular groove.

2. The small-diameter deep-hole inner annular groove inspection assembly according to claim 1, characterized in that, The measuring step includes a mating area in the middle and interference avoidance areas at both ends. The width of the interference avoidance area is smaller than the width of the mating area. The outer edge of the mating area is an arc. The circle formed by the arc of the outer edge of the mating area and the circle formed by the arc of the outer surface of the positioning piece have the same center. The straight line length of the two ends of the outer edge of the mating area is the mating length. The mating length is greater than or equal to 1 / 3 of the standard size of the annular groove diameter.

3. The small-diameter deep-hole inner annular groove inspection assembly according to claim 2, characterized in that, The standard size of the annular groove diameter is less than 1 / 2 of the mating length.

4. The small-diameter deep-hole inner annular groove inspection assembly according to claim 1, characterized in that, The straight length of the cut of the cylindrical body is the second length, and the standard size of the annular groove diameter minus the diameter of the small hole to be measured is the third length. The second length is greater than 1.1 times the third length.

5. The small-diameter deep-hole inner annular groove inspection assembly according to claim 1, characterized in that, The measuring pin is a three-section stepped pin, with cylindrical pins at both ends and a hand-held area and an engraving marking area in the middle.

6. The small-diameter deep-hole inner annular groove inspection assembly according to claim 1, characterized in that, The measuring pin is made of high-carbon alloy steel.

7. The small-diameter deep-hole inner annular groove inspection assembly according to claim 6, characterized in that, The surface of the measuring pin has been hardened.

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