Synchronizer tooth precision detection method, electronic device and storage medium

Abstract

The present application relates to the technical field of gear manufacturing, and in particular to a method, electronic device, and storage medium for detecting the precision of synchronizer coupling teeth. The detection method comprises: locating the pitch circle of the coupling teeth, wherein the circumference of the pitch circle intersects with each of the coupling teeth to form a reference point, and using the plane where the reference point is located as a reference section; obtaining the coordinates of the reference point on the reference section, and obtaining a single tooth pitch based on the coordinates of two adjacent reference points; obtaining a comprehensive deviation of the tooth pitch based on the single tooth pitch, and evaluating the synchronizer coupling tooth precision based on the comprehensive deviation of the tooth pitch. The method provided by the present application is simple and easy to implement, requires a small amount of data to be processed, can quickly and accurately evaluate the coupling tooth precision, and obtains a comprehensive evaluation of the coupling tooth precision, and the detection result is objective and reliable.

Description

Technical Field

[0001] The present application relates to the technical field of gear manufacturing, and in particular to a method for detecting the accuracy of synchronizer teeth, an electronic device, and a storage medium. Background Art

[0002] The synchronizer is a key component in the gearbox, and the gear sleeve is a key component in the synchronizer. The manufacturing accuracy of the coupling teeth in the gear sleeve determines the accuracy of the finished synchronizer product, which has a great impact on the operating efficiency of the motor in the gearbox. The existing detection technology for the accuracy of the coupling teeth obtains the accuracy of a single coupling tooth by detecting the three-dimensional contour of the coupling teeth. This detection method requires the acquisition of a large amount of data, which increases the sampling error, and has a large amount of calculation, a long time consumption, and a high cost. In addition, since this method can only obtain the detection accuracy of a single coupling tooth, it cannot comprehensively evaluate the accuracy of all the coupling teeth in the gear sleeve. The performance of the gearbox is the result of the comprehensive influence of the accuracy of all the coupling teeth in the synchronizer. Therefore, the existing detection technology cannot objectively reflect the accuracy of the coupling teeth. Summary of the Invention

[0003] In order to solve the one-sidedness of the existing technology that can only evaluate the accuracy of a single coupling tooth in the synchronizer, and to improve the objectivity and reliability of the coupling tooth accuracy evaluation,

[0004] In a first aspect, the present application provides a method for detecting the accuracy of a synchronizer coupling tooth, wherein the synchronizer is provided with a plurality of coupling teeth in a circumferential direction, and the detection method comprises:

[0005] Positioning the pitch circle of the coupling teeth, where the circumference of the pitch circle intersects with each of the coupling teeth to form a reference point, and using the plane where the reference point is located as a reference section;

[0006] Acquire the coordinates of the reference points on the reference cross section, and acquire a single tooth pitch based on the coordinates of two adjacent reference points;

[0007] A comprehensive deviation of the tooth pitch is obtained based on the single tooth pitch, and the synchronizer combined tooth accuracy is evaluated based on the comprehensive deviation of the tooth pitch.

[0008] Furthermore, obtaining the coordinates of the reference point includes obtaining original coordinate data of the reference point on the reference cross section using a profilometer.

[0009] Furthermore, after obtaining the plane coordinates of the reference point using a profilometer, the method further includes converting the original coordinate data into an electrical signal, amplifying and filtering the electrical signal, and converting the electrical signal into plane coordinate data for calculation to improve the accuracy of the plane coordinate data.

[0010] Furthermore, obtaining a comprehensive deviation of the tooth pitch based on the single tooth pitch includes:

[0011] The deviation of the single tooth pitch is obtained, and the deviations of all the single tooth pitches are summed to obtain the comprehensive deviation of the tooth pitch.

[0012] Further, obtaining the deviation of the single tooth pitch includes calculating the deviation d of the single tooth pitch through the error value formula d=|(LM) / (L / 100)|, wherein L represents the actual single tooth pitch and M represents the theoretical single tooth pitch.

[0013] Furthermore, obtaining the deviation of the single tooth pitch also includes:

[0014] Determine whether the deviation of each single tooth pitch is greater than a preset allowable error value threshold. When the judgment result is yes, determine that the corresponding coupling tooth is the problematic coupling tooth, and record the coordinate position of the problematic coupling tooth.

[0015] Furthermore, the detection method further comprises:

[0016] On the reference cross section, each of the coupling teeth includes a first oblique side and a second oblique side, a reference line is set through the reference point and parallel to the second oblique side, and an actual angle between the reference line and the first oblique side is obtained;

[0017] A comprehensive angular deviation is obtained based on each of the actual included angles to evaluate the synchronizer engagement tooth accuracy.

[0018] Furthermore, based on the comprehensive deviation of the tooth pitch and the comprehensive angular deviation, a deviation curve is drawn to evaluate the synchronizer combined tooth accuracy.

[0019] In a second aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method steps described in any one of the first aspects are implemented.

[0020] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the method steps described in the first aspect.

[0021] Beneficial effects:

[0022] The present application locates the pitch circle of the coupling teeth, where the circumference of the pitch circle intersects with each coupling tooth to form a reference point, with the plane where the reference point is located serving as a reference section; obtains the coordinates of the reference point on the reference section, and obtains a single tooth pitch based on the coordinates of two adjacent reference points; obtains the comprehensive deviation of the tooth pitch based on the single tooth pitch, and evaluates the accuracy of the synchronizer coupling teeth based on the comprehensive deviation of the tooth pitch. The method provided by the present application solves the one-sidedness of the existing technology that can only evaluate the accuracy of a single coupling tooth. Since the operating efficiency of the transmission in the synchronizer is the result of the combined influence of the accuracy of all coupling teeth, the method provided by the present application can more objectively and reliably evaluate the accuracy of the synchronizer coupling teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is a schematic diagram of the method flow provided in Example 1 of the present application;

[0025] Figure 2 This is a schematic diagram of the coupling tooth structure in Example 1 of the present application;

[0026] Figure 3 This is a schematic diagram of the electronic structure equipment in Example 2 of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0028] Example 1

[0029] Example 1 provides a method for detecting the accuracy of synchronizer coupling teeth. The synchronizer used in Example 1 is provided with 45 coupling teeth 1 in the circumferential direction, and the coupling teeth 1 are spline teeth.

[0030] As attached Figure 1 As shown, the detection method includes the following steps:

[0031] S1, locating the pitch circle 2 of the coupling tooth 1, wherein the circumference of the pitch circle 2 intersects with each coupling tooth 1 to form a reference point 5, and the plane where the reference point 5 is located is used as a reference section;

[0032] S2, obtaining the coordinates of the reference point 5 on the reference cross section, and obtaining a single tooth pitch based on the coordinates of two adjacent reference points 5;

[0033] S3, obtaining a comprehensive deviation of the tooth pitch based on the single tooth pitch, and evaluating the accuracy of the synchronizer combined tooth 1 based on the comprehensive deviation of the tooth pitch.

[0034] The following is combined with Figure 1-2 And specific implementation method is described in detail:

[0035] Execute step S1 to locate the pitch circle 2 of the coupling tooth 1, wherein the circumference of the pitch circle 2 intersects with each coupling tooth 1 to form a reference point 5, and the plane where the reference point 5 is located is used as a reference section;

[0036] Combined with attachment Figure 2 Specifically, the pitch circle 2 of the synchronizer's coupling tooth 1 is a dimensional reference selected to facilitate the design and manufacture of synchronizer coupling teeth 1. It serves as the basis for calculating the dimensions of each component of the coupling tooth 1. When the synchronizer meets the required accuracy, the distance between the two intersection points formed by the circumference of the pitch circle 2 and the same oblique side of adjacent coupling teeth 1 is the theoretical tooth pitch.

[0037] Therefore, the circumference of the positioning pitch circle 2 intersects with each of the coupled teeth 1 to form a reference point 5, and the single tooth pitch deviation can be quickly determined by using the plane where the reference point 5 is located as a reference section.

[0038] The theoretical tooth pitches of different types of synchronizers are input into the data processor in advance.

[0039] Next, step S2 is performed to obtain the coordinates of the reference point 5 on the reference cross section, and obtain a single tooth pitch based on the coordinates of two adjacent reference points 5;

[0040] Specifically, a reference coordinate system is established within the reference section, and the stylus on the profilometer is used to obtain the two-dimensional coordinate values ​​H1 (x1, y1), H2 (x2, y2), ..., H45 (x45, y45) of the reference point 5H corresponding to each coupling tooth 1 on the reference section.

[0041] To reduce errors, after the profilometer acquires raw coordinate data, the data processor first converts the raw coordinate data into electrical signals, amplifies and filters the signals. This filtering removes sampling errors caused by the surface roughness of the sampled object during the sampling process. After amplification and filtering, the raw coordinate data is converted into plane coordinate data for calculation, thereby improving the accuracy of the plane coordinate data.

[0042] The data processor uses the distance formula based on the plane coordinate data of two adjacent reference points 5

[0043] L=√(x2-x1)2+(y2-y1)2Calculate the distance between two adjacent reference points 5,

[0044] That is, the single tooth pitch is L1, L2, ..., L45.

[0045] Next, step S3 is executed to obtain a comprehensive deviation of the tooth pitch based on the single tooth pitch, and the accuracy of the synchronizer combined tooth 1 is evaluated based on the comprehensive deviation of the tooth pitch.

[0046] Specifically, the theoretical tooth pitch value M corresponding to the synchronizer being tested and the error value threshold D allowed to occur in a single tooth pitch are pre-set to the data processor. The data processor calculates the error values ​​of L1, L2, ..., L45 one by one with the corresponding theoretical tooth pitch value M through the error value formula d = ∣(LM) / (L / 100)∣, obtains the tooth pitch error value D between each actual tooth pitch and the theoretical tooth pitch, sums the deviations of all the single tooth pitches, and obtains the comprehensive deviation of the tooth pitch.

[0047] Check one by one whether each pitch error value d is greater than the error value threshold D allowed to occur.

[0048] When the judgment result is no, it means that the accuracy of the coupling tooth 1 in the currently detected synchronizer meets the standard; when the judgment result is yes, it indicates that the accuracy of the corresponding coupling tooth 1 does not meet the accuracy requirements, and the corresponding coupling tooth 1 is determined as the problem coupling tooth 1, and the position of the accuracy of the coupling tooth 1 and the tooth pitch between adjacent coupling teeth 1 are evaluated.

[0049] As an optional implementation, the detection method further includes:

[0050] On the reference cross section, each coupling tooth 1 includes a first oblique side 3 and a second oblique side 4 , and a reference line is provided through the reference point 5H and parallel to the second oblique side 4 .

[0051] The rotation angle 6 between the reference line and the first bevel 3 in each coupling tooth 1 is measured in sequence by the stylus of the profilometer to obtain actual included angles ∠1, ∠2, ..., ∠45.

[0052] Among the included angles ∠1, ∠2, ..., ∠45, select the maximum angle ∠8 and the minimum angle ∠15.

[0053] Calculate ∠8-∠15, obtain the maximum angle difference as the comprehensive angular deviation, and determine whether the maximum angle difference is within the preset difference threshold. If the judgment result is no, it indicates that the detected synchronizer does not meet the accuracy requirements; if the judgment result is yes, it indicates that the detected synchronizer meets the accuracy requirements.

[0054] The accuracy of the coupled teeth 1 of the synchronizer being tested is evaluated by the number of the problematic coupled teeth 1, the comprehensive deviation of the tooth pitch, and the comprehensive angular deviation.

[0055] Based on the comprehensive deviation of the tooth pitch and the comprehensive angular deviation, a deviation curve is drawn. The deviation curve can intuitively and quickly reflect the comprehensive deviation of each detected synchronizer engagement tooth 1.

[0056] The measurement results can be output via a display or printer.

[0057] Compared with the prior art, Example 1 evaluates the accuracy of the coupling tooth 1 by collecting the three-dimensional profile of the coupling tooth 1. The present application makes the detection equivalent to a two-dimensional plane, which greatly simplifies the amount of data obtained and calculated, and also reduces the errors that may be caused in the process of obtaining and processing a large amount of data; the method provided in Example 1 solves the one-sidedness of the prior art that can only evaluate the accuracy of a single coupling tooth 1. Since the operating efficiency of the transmission in the synchronizer is the result of the combined influence of the accuracy of all the coupling teeth 1, the detection method provided in Example 1 can more objectively and reliably evaluate the accuracy of the coupling tooth 1 in the synchronizer.

[0058] Example 2

[0059] Based on the same inventive concept, embodiment 3 of the present application provides an electronic device, as shown in the attached Figure 3 As shown, it includes a memory 304, a processor 302 and a computer program stored in the memory 304 and executable on the processor 302. When the processor 302 executes the program, the steps of the above-mentioned method for detecting the precision of the synchronizer teeth are implemented.

[0060] Among them, Figure 3 In the embodiment of the present invention, a bus architecture (represented by bus 300) is shown. Bus 300 may include any number of interconnected buses and bridges, and bus 300 links together various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 306 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same component, namely a transceiver, which provides a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 may be used to store data used by processor 302 when performing operations.

[0061] Example 3

[0062] Based on the same inventive concept, embodiment 3 of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-mentioned method for detecting the accuracy of synchronizer teeth.

[0063] The algorithm and display provided herein are not inherently related to any particular computer, virtual system or other device. Various general-purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing this type of system. In addition, the present invention is not directed to any specific programming language. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the above description of specific languages ​​is for the purpose of disclosing the best mode of the present invention.

[0064] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0065] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0066] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition may be divided into multiple submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed herein may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0067] Furthermore, those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination.

[0068] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components in the electronic device according to an embodiment of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for executing a part or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0069] The above is only an embodiment of the present application. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of this application, several variations and improvements can be made, which should also be regarded as the scope of protection of this application. These will not affect the effect of the implementation of this application and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for detecting the accuracy of a synchronizer engaging tooth, wherein the synchronizer is provided with a plurality of engaging teeth in a circumferential direction, characterized in that: The detection method comprises: Positioning the pitch circle of the coupling teeth, where the circumference of the pitch circle intersects with each of the coupling teeth to form a reference point, and using the plane where the reference point is located as a reference section; Acquire the coordinates of the reference points on the reference cross section, and acquire a single tooth pitch based on the coordinates of two adjacent reference points; obtaining a comprehensive deviation of tooth pitches based on the single tooth pitches, and evaluating the synchronizer combined tooth accuracy based on the comprehensive deviation of tooth pitches; The detection method further comprises: On the reference cross section, each of the coupling teeth includes a first oblique side and a second oblique side, a reference line is set through the reference point and parallel to the second oblique side, and an actual angle between the reference line and the first oblique side is obtained; Obtaining a comprehensive angular deviation based on each of the actual included angles to evaluate the synchronizer engagement tooth accuracy; The detection method further comprises: Based on the comprehensive deviation of the tooth pitch and the comprehensive angular deviation, a deviation curve is drawn to evaluate the synchronizer combined tooth accuracy.

2. The method for detecting the accuracy of synchronizer engagement teeth according to claim 1, characterized in that: The obtaining of the coordinates of the reference point includes obtaining original coordinate data of the reference point on the reference cross section using a profilometer.

3. The method for detecting the accuracy of synchronizer engagement teeth according to claim 2, characterized in that: After obtaining the original coordinate data of the reference point using a profilometer, the method further includes converting the original coordinate data into an electrical signal, amplifying and filtering the electrical signal, and converting the electrical signal into plane coordinate data for calculation to improve the accuracy of the original coordinate data.

4. The method for detecting the accuracy of synchronizer engagement teeth according to claim 1, wherein: The step of obtaining a comprehensive deviation of the tooth pitch based on the single tooth pitch includes: The deviation of the single tooth pitch is obtained, and the deviations of all the single tooth pitches are summed to obtain the comprehensive deviation of the tooth pitch.

5. The method for detecting the accuracy of synchronizer engagement teeth according to claim 4, characterized in that: The obtaining of the deviation of the single tooth pitch further comprises: Determine whether the deviation of each single tooth pitch is greater than a preset allowable error value threshold. When the judgment result is yes, determine that the corresponding coupling tooth is a problematic coupling tooth, and record the coordinate position of the problematic coupling tooth.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method steps according to any one of claims 1 to 5 are implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method steps according to any one of claims 1 to 5 are implemented.

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