Method for detecting position angle of W-shaped groove on inner wall of bearing bush
The distance and radius of the W-shaped groove of the inner wall of the bearing shell is measured by a contourmeter, and the angle is calculated in combination with the arcsine function, the problem of measuring the position angle of the W-shaped groove of the bearing shell is solved, and the precise processing and stable use of the bearing shell is achieved.
Patent Information
- Application Number
- CN202411385028.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-02-14
AI Technical Summary
The prior art is difficult to accurately measure the position angle of the W-shaped groove of the inner wall of the bearing shell, resulting in poor lubrication and friction heating problems.
By measuring the distance L between the W-shaped grooves with a contour meter, and combining the radius R of the inner wall arc of the bearing shell, the position angle θ between the W-shaped grooves is calculated using the inverse sine function to guide the processing and debugging of the bearing shells.
The accurate measurement of the position angle of the W-shaped groove of the inner wall of the bearing shell is achieved, avoiding excessive fluctuations in the bearing shell size and ensuring the quality of subsequent assembly and use.
Smart Images
Figure CN119437008A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of detecting the position angle of an oil groove on the inner wall of a bearing, and in particular to a method for detecting the position angle of a W-shaped groove on the inner wall of a bearing. Background Art
[0002] At present, the bearing is the contact part between the sliding bearing and the shaft neck. If it is not lubricated well, the bearing will easily burn out due to friction and heat, or the shaft neck and the bearing will lock.
[0003] In the related art, the size of the W-shaped groove on the inner wall of the bearing is ensured by controlling the processing program. Due to the spatial characteristics of the W-shaped groove on the inner wall of the bearing, the position angle of the W-shaped groove on the inner wall of the bearing cannot be measured directly. The shape of the W-shaped groove on the inner wall of the bearing is mainly observed by the naked eye to judge whether the product size meets the requirements, or by using 3D model comparison and detection, it is difficult to achieve accurate measurement of the angle size.
[0004] Therefore, it is necessary to design a new method for detecting the position angle of the W-shaped groove on the inner wall of the bearing to overcome the above problems. Summary of the invention
[0005] The present application provides a method for detecting the position angle of the W-shaped groove on the inner wall of a bearing, which can solve the technical problem in the related art that the W-shaped groove on the inner wall of the bearing is mainly judged whether the product size meets the requirements by observing the shape with the naked eye, or by using 3D model comparison detection, and it is difficult to achieve accurate measurement of the angle size.
[0006] In a first aspect, an embodiment of the present application provides a method for detecting a position angle of a W-shaped groove on an inner wall of a bearing bush, comprising the following steps:
[0007] S1: Use a profilometer to measure the distance L between each groove of the W-shaped groove, wherein the groove between two adjacent turning points of the W-shaped groove is a groove segment, and the distance between two adjacent groove segments is L.
[0008] S2: Calculate the radius R of the arc on the inner wall of the bearing.
[0009] S3: Using the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing shell, the corresponding position angle θ between each groove of the W-shaped groove is calculated by the inverse sine function.
[0010] Among them, the profilometer can be used to measure the distance L between each groove of the W-shaped groove, wherein the groove between two adjacent turning points of the W-shaped groove is a section of the groove, and the distance L between two adjacent sections of the groove is the distance between two adjacent turning points of the W-shaped groove along the extension direction of the bearing shell. The digital micrometer can be used to measure the outer diameter of the bearing shell and calculate the radius R of the arc of the inner wall of the bearing shell. Finally, the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing shell can be used to calculate the corresponding position angle θ between each groove of the W-shaped groove through the inverse sine function. According to the corresponding position angle θ between each groove of the W-shaped groove, the processing procedure of the bearing shell can be adjusted in time to avoid excessive fluctuations in the size of the bearing shell that affect subsequent assembly and use.
[0011] In combination with the first aspect, in one embodiment, the calculating the angle θ corresponding to each groove of the W-shaped groove by using the inverse sine function using the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing comprises:
[0012] θ=2sin -1 [(L / 2) / R].
[0013] The distance L between the grooves of the W-shaped groove and the radius R of the arcs of the inner wall of the two adjacent bearing bushes are used to form an isosceles triangle, and the angle θ corresponding to each groove of the W-shaped groove is calculated by the inverse sine function, wherein the angle θ corresponding to each groove of the W-shaped groove, the distance L between the grooves of the W-shaped groove and the radius R of the arc of the inner wall of the bearing bush satisfy the following relationship:
[0014] θ=2sin -1 [(L / 2) / R].
[0015] In combination with the first aspect, in one implementation, measuring the distance L between each groove of the W-shaped groove by using a profilometer includes:
[0016] S101: Use a profilometer to measure the cross-sectional profile of the inner circle of the bearing shell and the W-shaped groove.
[0017] S102: Measure the distance L between each groove of the W-shaped groove according to the cross-sectional profile of the inner circle of the bearing shell and the W-shaped groove.
[0018] The profiler can be used to measure the cross-sectional profile of the inner circle of the bearing shell and the W-shaped groove, and the distance L between each groove of the W-shaped groove can be directly measured based on the cross-sectional profile of the inner circle of the bearing shell and the W-shaped groove.
[0019] In combination with the first aspect, in one embodiment, the use of a profiler to measure the cross-sectional contour of the inner circle of the bearing and the W-shaped groove includes: clamping the bearing with a fixture, and using a profiler to measure the cross-sectional contour of the inner circle of the bearing and the W-shaped groove located in the middle position of the bearing width direction.
[0020] Among them, the W-shaped groove is an inner groove, and the distance L between each groove of the W-shaped groove cannot be accurately measured directly through two adjacent turning points of the W-shaped groove along the extension direction of the bearing, but can be obtained by equivalent conversion through the inner circle of the bearing and the cross-sectional contour figure of the W-shaped groove located in the middle position in the width direction of the bearing.
[0021] In combination with the first aspect, in one embodiment, the cross-sectional contour figure of the inner circle of the bearing and the W-shaped groove located in the middle position in the width direction of the bearing includes an arc line and a plurality of semicircular arcs arranged on the arc line, and the plurality of semicircular arcs are distributed in sequence at intervals, and the plurality of semicircular arcs include a first semicircular arc, a second semicircular arc and a third semicircular arc that are adjacent to each other in sequence. The method of measuring the distance L between each groove of the W-shaped groove according to the cross-sectional contour figure of the inner circle of the bearing and the W-shaped groove includes: connecting the center points of the first semicircular arc and the third semicircular arc and measuring the distance, so as to obtain the distance L between two adjacent sections of the W-shaped groove.
[0022] Among them, the cross-sectional contour figure of the inner circle of the bearing and the W-shaped groove located in the middle position in the width direction of the bearing includes a section of the arc line and a plurality of semicircular arcs arranged on the arc line, and the plurality of semicircular arcs are distributed in sequence and spaced apart, and the plurality of semicircular arcs include the first semicircular arc, the second semicircular arc and the third semicircular arc that are adjacent to each other in sequence, and the first semicircular arc and the third semicircular arc can obtain the center point of the chord length corresponding to the semicircular arc through the auxiliary circle, and the distance between the center points of the first semicircular arc and the third semicircular arc is parallel and equal to the distance L between the grooves of the W-shaped groove. The center points of the first semicircular arc and the third semicircular arc are connected and the distance is measured to obtain the distance L between two adjacent grooves of the W-shaped groove, and the distance L between two adjacent grooves of the W-shaped groove is equal to the distance L between the grooves of the W-shaped groove.
[0023] In combination with the first aspect, in one implementation, calculating the radius R of the arc of the inner wall of the bearing bush includes:
[0024] S201: Use a digital micrometer to measure the outer diameter of the bearing and a wall thickness micrometer to measure the wall thickness of the bearing.
[0025] S202: The radius R of the arc of the inner wall of the bearing is calculated using the outer diameter of the bearing and the wall thickness of the bearing.
[0026] The radius R of the inner wall arc of the bearing bush can be calculated using the outer diameter D of the bearing bush and the wall thickness d of the bearing bush. The radius R of the inner wall arc of the bearing bush satisfies the following relationship with the outer diameter D of the bearing bush and the wall thickness d of the bearing bush:
[0027] R = (D-2d) / 2.
[0028] In combination with the first aspect, in one embodiment, the detection method also includes adjusting the processing program of the bearing shell if the corresponding position angle θ between each groove of the W-shaped groove exceeds the set tolerance range, and repeating the next detection of the position angle θ until the size requirement is met.
[0029] Among them, exemplarily, the position angle θ corresponding to each groove of the W-shaped groove can be set to 15° according to customer needs, and the set tolerance range can be set to ±1° according to customer needs. If the position angle θ corresponding to each groove of the W-shaped groove is not between 14 and 16°, the processing program of the bearing needs to be adjusted. After the bearing is processed and debugged, the position angle θ is repeatedly detected for the next time on the bearing. If the position angle θ corresponding to each groove of the W-shaped groove is within the set tolerance range, there is no need to continue to adjust the processing program of the bearing and repeat the detection of the position angle θ. In other embodiments, exemplarily, the position angle θ corresponding to each groove of the W-shaped groove can be set to 10° according to customer needs, and the set tolerance range can be set to ±0.5° according to customer needs. If the position angle θ corresponding to each groove of the W-shaped groove is not between 9.5 and 10.5°, the processing program of the bearing needs to be adjusted.
[0030] In combination with the first aspect, in one embodiment, the W-shaped groove includes multiple sections of V-shaped grooves and square grooves connected end to end, and multiple sections of the V-shaped grooves are connected to opposite sides of the square groove, and the corresponding position angle θ between each groove of the W-shaped groove includes the position angle corresponding to the V-shaped groove and the position angle corresponding to the square groove.
[0031] Wherein, the W-shaped groove includes a plurality of sections of the V-shaped groove and the square groove connected end to end, the opposite two sides of the square groove overlap with the connected V-shaped groove, the other two sides of the square groove are perpendicular to the connected V-shaped groove, a center hole is provided in the center of the square groove, and the center hole is connected to the two sides of the square groove, the position angle corresponding to the V-shaped groove is the position angle corresponding to the opening of the V-shaped groove, the position angle corresponding to the square groove is the position angle of the turning point of the square groove relative to the center of the center hole, the position angles corresponding to the V-shaped grooves at various locations are equal, the position angles corresponding to the square grooves at various locations are equal, the distances L1, L2, L3, L6, L7 and L8 between the grooves corresponding to the V-shaped grooves are equal, and the distances L4, L5, L9 and L10 between the grooves corresponding to the square grooves are equal. 10 The distances between the grooves corresponding to the square grooves are equal to the distances between the turning points of the square grooves and the center hole. The distances between the grooves corresponding to the square grooves can be detected by an imager.
[0032] In combination with the first aspect, in one embodiment, the detection method according to claim 1 is characterized in that the value range of the position angle θ corresponding to each groove of the W-shaped groove is 3 to 20°.
[0033] Among them, the value range of the position angle θ corresponding to each groove of the W-shaped groove can be set to 3~20°. Preferably, the position angle θ corresponding to each groove of the W-shaped groove is set to 15°, so that the distribution of the W-shaped groove is uniform and the oil conduction is smoother.
[0034] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:
[0035] By using the distance L between each W-shaped groove and the radius R of the arc on the inner wall of the bearing, the inverse sine function is substituted to calculate the corresponding angle θ between each W-shaped groove to guide the processing and debugging of the bearing. This solves the problem that in related technologies, the W-shaped groove on the inner wall of the bearing is mainly judged by visual observation to see whether the product size meets the requirements, or by using 3D model comparison and detection, which makes it difficult to achieve accurate measurement of angle dimensions. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0037] Figure 1 A schematic diagram of the steps of a method for detecting the position angle of a W-shaped groove on the inner wall of a bearing provided in an embodiment of the present application;
[0038] Figure 2 A schematic diagram of the principle of a method for detecting the position angle of a W-shaped groove on the inner wall of a bearing provided in an embodiment of the present application;
[0039] Figure 3 A schematic diagram of the principle of calculating position angle using the inverse sine function provided in an embodiment of the present application;
[0040] Figure 4 A schematic diagram of the principle of measuring the distance between each groove of the W-shaped groove provided in an embodiment of the present application.
[0041] In the figure: 1, first semicircular arc; 2, second semicircular arc; 3, third semicircular arc; 4, V-shaped groove; 5, square groove. DETAILED DESCRIPTION
[0042] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0043] An embodiment of the present application provides a method for detecting the position angle of a W-shaped groove on the inner wall of a bearing, which can solve the technical problem that the W-shaped groove on the inner wall of the bearing is mainly judged by visual observation of the shape to see whether the product size meets the requirements, or by using 3D model comparison detection, which makes it difficult to accurately measure the angle size.
[0044] See also Figure 1 and Figure 2 As shown, the embodiment of the present application provides a method for detecting the position angle of the W-shaped groove on the inner wall of a bearing bush, which comprises the following steps:
[0045] S1: Use a profilometer to measure the distance L between each groove of the W-shaped groove, wherein the groove between two adjacent turning points of the W-shaped groove is a groove segment, and the distance between two adjacent groove segments is L.
[0046] S2: Calculate the radius R of the arc on the inner wall of the bearing.
[0047] S3: Using the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing shell, the corresponding position angle θ between each groove of the W-shaped groove is calculated by the inverse sine function.
[0048] In this embodiment, the profilometer can be used to measure the distance L between each groove of the W-shaped groove, wherein the groove between two adjacent turning points of the W-shaped groove is a section of the groove, and the distance L between two adjacent sections of the groove is the distance between two adjacent turning points of the W-shaped groove along the extension direction of the bearing shell. The digital micrometer can be used to measure the outer diameter of the bearing shell and calculate the radius R of the arc of the inner wall of the bearing shell. Finally, the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing shell can be used to calculate the corresponding position angle θ between each groove of the W-shaped groove through the inverse sine function. According to the corresponding position angle θ between each groove of the W-shaped groove, the processing procedure of the bearing shell can be adjusted in time to avoid excessive fluctuations in the size of the bearing shell that affect subsequent assembly and use.
[0049] This embodiment uses the distance L between the grooves of the W-shaped groove and the radius R of the arc of the inner wall of the bearing shell, and substitutes them into the inverse sine function to calculate the corresponding angle θ between the grooves of the W-shaped groove, so as to guide the processing and debugging of the bearing shell, avoid excessive size fluctuations of the bearing shell and affect subsequent assembly and use, and solves the problem that in the related art, the W-shaped groove on the inner wall of the bearing shell is mainly judged by visual observation of the shape to see whether the product size meets the requirements, or by using 3D model comparison and detection, which makes it difficult to achieve accurate measurement of angle dimensions.
[0050] Further, see Figure 3 As shown, in some embodiments, the calculation of the angle θ corresponding to each groove of the W-shaped groove by using the inverse sine function using the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing bush comprises:
[0051] θ=2sin-1 [(L / 2) / R].
[0052] In this embodiment, the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of two adjacent bearing bushes are used to form an isosceles triangle, and the angle θ corresponding to each groove of the W-shaped groove is calculated by an inverse sine function, wherein the angle θ corresponding to each groove of the W-shaped groove, the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing bush satisfy the following relationship:
[0053] θ=2sin -1 [(L / 2) / R].
[0054] Further, see Figure 2 and Figure 4 As shown, in some embodiments, measuring the distance L between each groove of the W-shaped groove by using a profilometer includes:
[0055] S101: Use a profilometer to measure the cross-sectional profile of the inner circle of the bearing shell and the W-shaped groove.
[0056] S102: Measure the distance L between each groove of the W-shaped groove according to the cross-sectional profile of the inner circle of the bearing shell and the W-shaped groove.
[0057] In this embodiment, the profiler can be used to measure the cross-sectional contour of the inner circle of the bearing shell and the W-shaped groove, and the distance L between each groove of the W-shaped groove can be directly measured based on the cross-sectional contour of the inner circle of the bearing shell and the W-shaped groove.
[0058] Further, see Figure 2 and Figure 4 As shown, in some embodiments, the use of a profiler to measure the cross-sectional contour of the inner circle of the bearing and the W-shaped groove includes: clamping the bearing with a fixture, and using a profiler to measure the cross-sectional contour of the inner circle of the bearing and the W-shaped groove located in the middle position of the bearing width direction.
[0059] In this embodiment, the W-shaped groove is an inner groove. The distance L between each groove of the W-shaped groove cannot be accurately measured directly through two adjacent turning points of the W-shaped groove along the extension direction of the bearing, but can be obtained by equivalent conversion through the inner circle of the bearing and the cross-sectional contour figure of the W-shaped groove located in the middle position in the width direction of the bearing.
[0060] Further, see Figure 4As shown, in some embodiments, the cross-sectional contour figure of the inner circle of the bearing and the W-shaped groove located in the middle position in the width direction of the bearing includes an arc line and a plurality of semicircular arcs arranged on the arc line, and the plurality of semicircular arcs are distributed in sequence at intervals, and the plurality of semicircular arcs include a first semicircular arc 1, a second semicircular arc 2 and a third semicircular arc 3 that are adjacent to each other in sequence, and measuring the distance L between each groove of the W-shaped groove according to the cross-sectional contour figure of the inner circle of the bearing and the W-shaped groove includes: connecting the center points of the first semicircular arc 1 and the third semicircular arc 3 and measuring the distance, so as to obtain the distance L between two adjacent grooves of the W-shaped groove.
[0061] In this embodiment, the cross-sectional contour figure of the inner circle of the bearing and the W-shaped groove located in the middle position in the width direction of the bearing includes a section of the arc line and a plurality of semicircular arcs arranged on the arc line. The plurality of semicircular arcs are spaced in sequence, and the plurality of semicircular arcs include the first semicircular arc 1, the second semicircular arc 2 and the third semicircular arc 3 that are adjacent to each other in sequence. The first semicircular arc 1 and the third semicircular arc 3 can obtain the center point of the chord length corresponding to the semicircular arc through the auxiliary circle. The distance between the center points of the first semicircular arc 1 and the third semicircular arc 3 is parallel and equal to the distance L between the grooves of the W-shaped groove. The center points of the first semicircular arc 1 and the third semicircular arc 3 are connected and the distance is measured to obtain the distance L between two adjacent grooves of the W-shaped groove. The distance L between two adjacent grooves of the W-shaped groove is equal to the distance L between the grooves of the W-shaped groove.
[0062] Further, see Figure 2 As shown, in some embodiments, the calculation of the radius R of the arc of the inner wall of the bearing includes:
[0063] S201: Use a digital micrometer to measure the outer diameter of the bearing and a wall thickness micrometer to measure the wall thickness of the bearing.
[0064] S202: The radius R of the arc of the inner wall of the bearing is calculated using the outer diameter of the bearing and the wall thickness of the bearing.
[0065] In this embodiment, the radius R of the inner wall arc of the bearing bush can be calculated using the outer diameter D of the bearing bush and the wall thickness d of the bearing bush. The radius R of the inner wall arc of the bearing bush and the outer diameter D of the bearing bush and the wall thickness d of the bearing bush satisfy the following relationship:
[0066] R = (D-2d) / 2.
[0067] Further, see Figure 2 As shown, in some embodiments, the detection method also includes adjusting the processing program of the bearing shell if the corresponding position angle θ between each groove of the W-shaped groove exceeds the set tolerance range, and then repeatedly detecting the position angle θ again until the size requirement is met.
[0068] In this embodiment, exemplarily, the position angle θ corresponding to each groove of the W-shaped groove can be set to 15° according to customer needs, and the set tolerance range can be set to ±1° according to customer needs. If the position angle θ corresponding to each groove of the W-shaped groove is not between 14 and 16°, the processing program of the bearing needs to be adjusted. After the bearing is processed and debugged, the position angle θ is repeatedly detected for the next time on the bearing. If the position angle θ corresponding to each groove of the W-shaped groove is within the set tolerance range, there is no need to continue to adjust the processing program of the bearing and repeat the detection of the position angle θ. In other embodiments, exemplarily, the position angle θ corresponding to each groove of the W-shaped groove can be set to 10° according to customer needs, and the set tolerance range can be set to ±0.5° according to customer needs. If the position angle θ corresponding to each groove of the W-shaped groove is not between 9.5 and 10.5°, the processing program of the bearing needs to be adjusted.
[0069] Further, see Figure 2 As shown, in some embodiments, the W-shaped groove includes multiple sections of V-shaped grooves 4 and square grooves 5 connected end to end, and multiple sections of the V-shaped grooves 4 are connected to the opposite sides of the square grooves 5, and the corresponding position angles θ between the grooves of the W-shaped grooves include the position angles corresponding to the V-shaped grooves 4 and the position angles corresponding to the square grooves 5.
[0070] In this embodiment, the W-shaped groove includes a plurality of sections of the V-shaped groove 4 and the square groove 5 connected end to end, the opposite sides of the square groove 5 overlap with the connected V-shaped groove 4, the other two sides of the square groove 5 are perpendicular to the connected V-shaped groove 4, a center hole is provided in the center of the square groove 5, and the center hole is connected to the two sides of the square groove 5, the position angle corresponding to the V-shaped groove 4 is the position angle corresponding to the opening of the V-shaped groove 4, the position angle corresponding to the square groove 5 is the position angle of the turning point of the square groove 5 relative to the center of the center hole, the position angles corresponding to the V-shaped groove 4 at each location are equal, the position angles corresponding to the square groove 5 at each location are equal, the distances L1, L2, L3, L6, L7 and L8 between the grooves corresponding to the V-shaped groove 4 are equal, and the distances L4, L5, L9 and L10 between the grooves corresponding to the square groove 5 are equal. 10 The distances between the grooves corresponding to the square groove 5 are equal to each other, and the distances between the grooves corresponding to the square groove 5 are the distances between the turning points of the square groove 5 and the center hole. The distances between the grooves corresponding to the square groove 5 can be detected by an imager.
[0071] Further, see Figure 2 As shown, in some embodiments, the value range of the position angle θ between each groove of the W-shaped groove is 3 to 20°. In this embodiment, the value range of the position angle θ between each groove of the W-shaped groove can be set to 3 to 20°. Preferably, the position angle θ between each groove of the W-shaped groove is set to 15°, so that the distribution of the W-shaped groove is uniform and the oil guide is smoother.
[0072] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0073] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0074] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.
Claims
1. A method for detecting the position angle of a W-shaped groove on the inner wall of a bearing, characterized in that: It includes the following steps: The distance L between each groove of the W-shaped groove is measured by using a profilometer, wherein the groove between two adjacent turning points of the W-shaped groove is a groove segment, and the distance between two adjacent groove segments is L; Calculate the radius R of the arc on the inner wall of the bearing; Using the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing shell, the corresponding position angle θ between each groove of the W-shaped groove is calculated by the inverse sine function.
2. The detection method according to claim 1, characterized in that The method of calculating the angle θ corresponding to each groove of the W-shaped groove by using the inverse sine function using the distance L between each groove of the W-shaped groove and the radius R of the arc of the inner wall of the bearing bush comprises: θ=2sin -1 [(L / 2) / R].
3. The detection method according to claim 1, characterized in that The method of measuring the distance L between each groove of the W-shaped groove by using a profilometer comprises: Use a profilometer to measure the cross-sectional profile of the inner circle of the bearing and the W-shaped groove; Measure the distance L between each groove of the W-shaped groove based on the cross-sectional contour of the inner circle of the bearing shell and the W-shaped groove.
4. The detection method according to claim 3, characterized in that The method of measuring the cross-sectional profile of the inner circle of the bearing bush and the W-shaped groove by using a profiler includes: The bearing shell is clamped by a fixture, and a profile meter is used to measure the cross-sectional profile of the inner circle of the bearing shell and the W-shaped groove located in the middle position of the bearing shell width direction.
5. The detection method according to claim 4, characterized in that: The cross-sectional profile of the inner circle of the bearing and the W-shaped groove located in the middle of the width direction of the bearing comprises an arc and a plurality of semicircular arcs arranged on the arc, the plurality of semicircular arcs are sequentially spaced and arranged, and the plurality of semicircular arcs comprise a first semicircular arc (1), a second semicircular arc (2) and a third semicircular arc (3) that are sequentially adjacent, and the distance L between each groove of the W-shaped groove according to the cross-sectional profile of the inner circle of the bearing and the W-shaped groove comprises: The distance L between two adjacent sections of the W-shaped groove can be obtained by connecting the center points of the first semicircular arc (1) and the third semicircular arc (3) and measuring the distance.
6. The detection method according to claim 1, characterized in that The calculation of the radius R of the arc of the inner wall of the bearing bush includes: Use a digital micrometer to measure the outer diameter of the bearing and a wall thickness micrometer to measure the wall thickness of the bearing; The radius R of the arc on the inner wall of the bearing is calculated using the outer diameter of the bearing and the wall thickness of the bearing.
7. The detection method according to claim 1, characterized in that The detection method also includes adjusting the processing program of the bearing shell if the position angle θ corresponding to each groove of the W-shaped groove exceeds the set tolerance range, and repeating the next detection of the position angle θ until the size requirement is met.
8. The detection method according to claim 1, characterized in that The W-shaped groove comprises a plurality of sections of V-shaped grooves (4) and square grooves (5) connected end to end, the square grooves (5) are connected to a plurality of sections of the V-shaped grooves (4) on opposite sides, and the position angles θ corresponding to the grooves of the W-shaped grooves include the position angles corresponding to the V-shaped grooves (4) and the position angles corresponding to the square grooves (5).
9. The detection method according to claim 1, characterized in that: The value range of the position angle θ between the W-shaped grooves is 3 to 20 degrees.