A method for detecting the diameter and position of a small radial straight hole in a bearing

Abstract

A method for detecting the diameter and position of small radial straight holes in bearings is described. This method uses a standard plug gauge in conjunction with a caliper to measure the minimum limit position dimension h1 and the maximum limit position dimension h2 of the standard plug gauge within the measured small straight hole from the bearing end face. The diameter and position of the small radial straight hole are then indirectly calculated using a formula. This method can be applied to measuring small holes with diameters ranging from 0.5 mm to 2.0 mm. It can quickly and easily detect and calculate the diameter and position of small radial straight holes in bearings, achieving quantitative measurement of the diameter of small radial straight holes in bearings and resolving the technical issue of existing techniques that prevent the position of small straight holes from being measured.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling bearing detection, in particular to a method for detecting the diameter and position of a small-sized radial straight hole of a bearing. Background Art

[0002] Bearings are a vital component in modern machinery, often called the joints of industry. Their primary function is to support rotating parts, reduce friction during movement, and ensure rotational accuracy. The small radial straight hole in a bearing is often used as an oil hole and is a key inspection item for finished bearings. It performs functions such as oiling, cooling, and cleaning. Bearing lubrication is crucial, especially in harsh operating environments, low-speed, heavy-load, and high-speed rotation conditions. Routine maintenance requires oiling through the oil hole to maintain lubrication and cooling, and to remove environmental debris and dust from the bearing interior. Furthermore, out-of-tolerance hole size and position can affect the dynamic balance of the bearing, thereby impacting its performance. Furthermore, in bearing production processes, small radial straight holes are often used as locating holes during machining, directly impacting the machining accuracy of subsequent steps. Therefore, the diameter and position of these small radial straight holes must be strictly controlled within tolerances; failure to do so can significantly impact the bearing's performance and service life.

[0003] Currently, the diameter of small radial straight holes (diameters φ0.5mm to φ2.0mm) in bearings is primarily inspected using plug gauges. The overstop of the plug gauge is used to qualitatively determine whether the diameter of the small straight hole is acceptable, but quantitative measurement is not possible. Currently, there is no suitable method for measuring the position of small straight holes (diameters φ0.5mm to φ2.0mm). Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a method for detecting the diameter and position of a small radial straight hole in a bearing, which can be applied to the measurement of small holes with a diameter of φ0.5mm to φ2.0mm.

[0005] The technical solution adopted by the present invention is: a method for detecting the diameter and position of a small-sized radial straight hole of a bearing. The detection method uses a standard plug gauge combined with a caliper to measure the minimum limit position dimension h1 of the standard plug gauge in the measured small-sized straight hole from the bearing end face and the maximum limit position dimension h2 of the standard plug gauge in the measured small-sized straight hole from the bearing end face, and indirectly calculates the diameter and position of the small-sized radial straight hole of the bearing through a formula.

[0006] As a preferred solution, the detection method is applied to the measurement of small holes with a diameter of φ0.5mm to φ2.0mm, and includes the following steps:

[0007] S1. Insert the standard plug gauge into the small straight hole to be measured, push the standard plug gauge vertically downward to the limit position in the small straight hole, and use a caliper to measure the minimum limit position dimension h1 of the standard plug gauge in the small straight hole to be measured from the bearing end face;

[0008] S2. Push the standard plug gauge vertically upward to the limit position in the small-sized straight hole, and use a caliper to measure the maximum limit position dimension h2 of the standard plug gauge in the small-sized straight hole to the bearing end face;

[0009] S3. Combine the h1 and h2 measured above with the diameter φ of the standard plug gauge 规 , calculate the diameter of the small radial straight hole of the bearing by the formula 孔 And the distance h between the center line of the small-size straight hole and the bearing end face.

[0010] As a preferred solution, in steps S1 and S2, the standard plug gauge should be pushed vertically so as to be in parallel contact with the inner wall surface of the small-sized straight hole.

[0011] As a preferred solution, the standard plug gauge used is cylindrical in shape as a whole, and its length is greater than the length of the small-sized straight hole to be measured.

[0012] As a preferred solution, in step S3, wherein:

[0013] Small straight hole diameter φ 孔 By the formula φ 孔 =h2-h1+φ 规 to obtain;

[0014] The distance h between the center line of the small straight hole and the bearing end face is calculated by the formula h=(h2+h1-φ 规 ) / 2 is obtained.

[0015] The beneficial effects of the present invention are:

[0016] The present invention optimizes the design of the measurement method, uses a caliper and a standard plug gauge to respectively measure the two extreme position dimensions of the standard plug gauge from the bearing end face in the measured hole, and uses a formula to indirectly calculate the diameter and position of the measured hole; the detection method described in the present invention can realize simple and fast detection and calculation of the diameter and position of the radial small-sized straight hole of the bearing, can realize quantitative measurement of the diameter of the small-sized straight hole and solves the problem that the position of the small-sized straight hole cannot be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the measurement requirements for the size and position of a small straight hole in a bearing according to the present invention;

[0019] Figure 2 This is a schematic diagram of measuring the minimum limit position size of the standard plug gauge from the ring end face in the small-sized straight hole being measured;

[0020] Figure 3 for Figure 2 A-direction schematic diagram in FIG;

[0021] Figure 4 This is a schematic diagram of measuring the maximum limit position size of the standard plug gauge from the ring end face in the small-sized straight hole being measured;

[0022] Figure 5 for Figure 4 Schematic diagram of direction B in .

[0023] Figure numerals: 1. outer diameter surface of the ferrule, 2. small-size straight hole to be measured, 3. end face of the ferrule, 4. center line of the hole to be measured, 5. standard plug gauge. DETAILED DESCRIPTION

[0024] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0025] It should be noted that: unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons having ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects with the same function.

[0026] A method for detecting the diameter and position of a small radial straight hole in a bearing is disclosed. The method uses a caliper and a standard plug gauge measuring tool to respectively measure the minimum limit position dimension h1 of the standard plug gauge from the bearing end face in the measured small straight hole and the maximum limit position dimension h2 of the standard plug gauge from the bearing end face in the measured small straight hole. The diameter φ and position h of the measured hole are indirectly calculated using the derived formula.

[0027] Example 1

[0028] The following is combined with Figure 1-5 The working process of this embodiment is described in detail:

[0029] A method for detecting the diameter and position of a small radial straight hole of a bearing comprises the following steps:

[0030] Select a standard plug gauge 5 of appropriate length. The standard plug gauge 5 is cylindrical as a whole. Its length should be greater than the length of the small-sized straight hole to be measured. The middle part is the working surface of the plug gauge, and the two sides are the hand-held parts. Its diameter is the lower limit of the diameter deviation of the small-sized straight hole 2 to be measured. Verify the standard plug gauge 5 to obtain the diameter φ of the standard plug gauge. 规 ;

[0031] Insert the standard plug gauge 5 into the small-sized straight hole 2 to be measured, and push the standard plug gauge 5 vertically downward to the limit position in the small-sized straight hole 2. Use a caliper or other tool to measure the minimum limit position dimension h1 of the standard plug gauge 5 in the small-sized straight hole 2 to the end face 3 of the bearing ring;

[0032] Then, push the standard plug gauge 5 vertically upward to the limit position in the small-sized straight hole 2, and use a measuring tool such as a caliper to measure the maximum limit position dimension h2 of the standard plug gauge 5 from the end face 3 of the bearing ring in the measured small-sized straight hole 2. It should be noted that when pushing the standard plug gauge 5 vertically, it should be ensured that the standard plug gauge 5 is in parallel contact with the inner wall surface 2 of the small-sized straight hole;

[0033] Finally, it will be 规 , h1 and h2 are substituted into the formula: φ 孔 =h2-h1+φ 规 , calculate the diameter of the small straight hole 2 to be measured; φ 规 , h1 and h2 are substituted into the formula: h=(h2+h1-φ 规 ) / 2, and calculate the position dimension from the center of the measured small-size straight hole 2 to the bearing end face.

[0034] It should be noted that the derivation process of the above formula is as follows:

[0035] analyze Figure 1 First, confirm that the small straight hole to be measured is the radial straight hole of the bearing, and the measured item is the diameter of the hole φ 孔and hole position h, where the hole position is the distance from the hole center to the bearing end face.

[0036] analyze Figure 2 and Figure 3 , h1 is the minimum limit position size of the standard plug gauge in the small straight hole to be measured from the bearing end face, φ 差 is the maximum gap between the measured small-size straight hole and the standard plug gauge, and the relationship can be obtained:

[0037] φ 差 =φ 孔 -φ 规 ①

[0038] analyze Figure 4 and Figure 5 , h2 is the maximum limit position size of the standard plug gauge in the small straight hole to be measured from the bearing end face, and combined with Figure 2 and Figure 3 The relationship can be obtained:

[0039] h2=h1+φ 差 ②

[0040] Combining formula ① and formula ②, we can get:

[0041] φ 孔 =h2-h1+φ 规 ③

[0042] At the same time, combined Figure 1-Figure 5 , we can get:

[0043] h=h2-φ 孔 / 2 ④

[0044] Combining formula ③ and formula ④, we can get:

[0045] h=(h2+h1-φ 规 ) / 2 ⑤

[0046] Wherein, formula ③ is the diameter of the small radial straight hole of the bearing φ 孔 Formula, Formula ⑤ is the formula for the radial small size straight hole position h of the bearing.

[0047] The parts not described in detail in this solution are prior art.

[0048] It should be noted that although the present invention has been described with reference to the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and modifications to the present invention, and such changes and modifications shall fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A method for detecting the diameter and position of a small radial straight hole in a bearing, which is applicable to the measurement of small holes with a diameter of φ0.5mm to φ2.0mm, and is characterized by: This detection method uses a standard plug gauge combined with a caliper to measure the minimum limit position dimension h1 of the standard plug gauge from the bearing end face in the measured small-size straight hole, and the maximum limit position dimension h2 of the standard plug gauge from the bearing end face in the measured small-size straight hole, and indirectly calculates the diameter and position of the small-size straight hole in the radial direction of the bearing through a formula; The detection method includes the following steps: S1. Insert the standard plug gauge into the small straight hole to be measured, push the standard plug gauge vertically downward to the limit position in the small straight hole, and use a caliper to measure the minimum limit position dimension h1 of the standard plug gauge in the small straight hole to be measured from the bearing end face; S2. Push the standard plug gauge vertically upward to the limit position in the small-sized straight hole, and use a caliper to measure the maximum limit position dimension h2 of the standard plug gauge in the small-sized straight hole to the bearing end face; S3. Combine the h1 and h2 measured above with the diameter φ of the standard plug gauge 规 , calculate the diameter of the small radial straight hole of the bearing by the formula 孔 And the distance h between the center line of the small-size straight hole and the bearing end face; In steps S1-S3, the standard plug gauge used is cylindrical in shape, and its length is greater than the length of the small-sized straight hole to be measured; In step S3, wherein: Small straight hole diameter φ 孔 By the formula φ 孔 = h2- h1+φ 规 to obtain; The distance h between the center line of the small straight hole and the bearing end face is calculated by the formula h=(h2+h1-φ 规 ) / 2 is obtained.

2. The method for detecting the diameter and position of a small radial straight hole in a bearing according to claim 1, characterized in that: In steps S1 and S2, the standard plug gauge should be pushed vertically so as to be in parallel contact with the inner wall surface of the small-sized straight hole.

Images