A method for processing the chamfered corner of synchronizer gear sleeve

Abstract

The present invention discloses a method for processing a chamfered plum angle of a synchronizer gear sleeve, wherein a plurality of spline teeth are formed on the inner side wall of the synchronizer gear sleeve, each of the spline teeth has two end portions to be processed along the axial direction of the synchronizer gear sleeve, and each of the end portions to be processed has two end surfaces to be processed along the radial direction of the synchronizer, and the method for processing a chamfered plum angle of the synchronizer gear sleeve comprises the following processing steps: obtaining the positions and the number of teeth of a plurality of the spline teeth; selecting any two non-adjacent spline teeth as two object teeth; taking the two end surfaces to be processed of the two object teeth in different directions as the starting milling positions, and continuously milling the plurality of the spline teeth on the synchronizer gear sleeve with preset milling parameters to form spline teeth final teeth; wherein the preset milling parameters include preset tool running trajectory parameters. The present invention aims to solve the problems of low processing efficiency and low processing precision of the existing chamfered plum angle of synchronizer gear sleeves.

Description

Technical Field

[0001] The invention relates to the technical field of synchronizer gear sleeves, in particular to the technical field of chamfered corner processing, and specifically to a method for processing chamfered corners of synchronizer gear sleeves. Background Art

[0002] In automobile gearboxes, the use of synchronizer shifting not only has the advantages of light shifting, avoiding impact, eliminating noise, and extending gear life, but also enables rapid shifting, improving the power, economy and safety of the car. Therefore, modern cars, especially the shifting mechanisms of sedans, almost all use this device. In the synchronizer structure, the sliding sleeve is a key part. Generally, the sliding sleeve is designed in the form of an involute internal spline. After the synchronizer sleeve shifting action is completed, the internal spline of the sleeve is inserted into the engaging tooth. To prevent gear disengagement, the engaging tooth and the sleeve are combined at the junction to form a tooth-direction inverted cone shape, so that the tangential force of the torque transmitted by the synchronizer during rotation generates an axial force on the inverted surface of the engaging tooth to overcome the gear disengagement force and make the engaged gear firm and reliable.

[0003] At present, the traditional domestic processing method is: use a special Meijiao machine to process one tooth at a time through a stroke method. After each tooth is processed, it is necessary to go through a circular indexing of the part to process another tooth. For example, a gear sleeve has 60 teeth, which requires 60 indexing and 60 stroke milling. The processing cycle is about 120 seconds, with low processing efficiency and low processing accuracy. Summary of the invention

[0004] The main purpose of the invention is to provide a method for processing the chamfered plum angle of a synchronizer gear sleeve, aiming to solve the problems of low processing efficiency and low processing precision of the plum angle of the existing synchronizer gear sleeve.

[0005] To achieve the above object, the present invention proposes a method for processing a chamfered plum angle of a synchronizer gear sleeve, wherein a plurality of spline teeth are formed on the inner side wall of the synchronizer gear sleeve, each of the spline teeth has two end portions to be processed along the axial direction of the synchronizer gear sleeve, and each of the end portions to be processed has two end surfaces to be processed along the radial direction of the synchronizer, and the method for processing the chamfered plum angle of the synchronizer gear sleeve comprises the following processing steps:

[0006] Obtaining the positions and numbers of the initial teeth of the plurality of spline teeth;

[0007] Select any two non-adjacent initial teeth of the spline teeth as two object teeth;

[0008] Taking the two end faces of the two target teeth in different directions as the starting milling positions, the plurality of spline teeth on the synchronizer gear sleeve are continuously milled with preset milling parameters to form spline teeth final teeth;

[0009] Wherein, the preset milling parameters include preset tool running trajectory parameters.

[0010] Optionally, before the step of obtaining the positions of the plurality of initial spline teeth, the following steps are also included:

[0011] Acquire spatial posture values ​​of multiple tools to generate multiple relative axial positions of the tools;

[0012] Fitting the relative axial positions of the plurality of tools to form a plurality of simulated tool running trajectories;

[0013] A simulated tool operation trajectory that avoids interference between all the tools is selected as a preset tool operation trajectory parameter.

[0014] Optionally, the multiple relative axial positions of the tools include the relative axial positions of each of the tools in the A1 axis, B1 axis, Y1 axis, E1 axis, X11 axis, Z11 axis, B2 axis, E2 axis, A2 axis, Y2 axis, X21 axis, Z21 axis, C2 axis, X2 axis and Z2 axis.

[0015] Optionally, the starting milling position is the addendum circle of the target tooth.

[0016] Optionally, after the step of selecting any two non-adjacent initial teeth of the spline teeth as two object teeth, the following steps are also included:

[0017] adjusting the offset of the synchronizer sleeve according to the starting angle of the synchronizer sleeve;

[0018] The processing parameters of the spline teeth are obtained, and the processing angle of the tool is adjusted according to the processing parameters of the spline teeth and the offset of the synchronizer gear sleeve.

[0019] Optionally, after the step of obtaining the plum angle processing parameters of the spline teeth and adjusting the milling angle of the tool according to the plum angle processing parameters and the offset of the synchronizer gear sleeve, the following steps are also included:

[0020] Determining the number of teeth of the spline teeth as the number of tool cycles;

[0021] The tooth spacing between two adjacent initial teeth of the spline teeth is obtained, and the tool offset is calculated according to the tooth spacing.

[0022] Optionally, the step of taking the two end faces to be processed of the two target teeth in different directions as the starting milling positions and continuously milling the plurality of spline teeth on the synchronizer gear sleeve with preset milling parameters to form the spline teeth final teeth also includes the following steps:

[0023] Selecting any end face where the end to be processed is located as the processing end face, taking the two end faces to be processed of the two target teeth in different directions as the starting milling positions, and continuously milling the end parts to be processed of the multiple spline teeth of the processing end face with preset milling parameters to form initial spline teeth;

[0024] Then, the end face where the other end to be processed is located is used as the processing end face, and the two end faces to be processed in different directions of the two initial spline teeth are used as the starting milling positions, and the end parts to be processed of multiple spline teeth initial teeth of the processing end face are continuously milled according to preset milling parameters to form spline teeth final teeth.

[0025] Optionally, the step of selecting the end face where any one of the end faces to be processed is located as the processing end face, taking the two end faces to be processed of the two target teeth in different directions as the starting milling positions, and continuously milling the end faces to be processed of the multiple spline teeth of the processing end face with preset milling parameters to form the initial spline teeth also includes the following steps:

[0026] The two end faces to be processed of the two object teeth in different directions are taken as the starting milling positions, and the parts to be processed of the two object teeth are milled with preset milling parameters. The two tools are adjusted to the initial teeth of the spline teeth adjacent to the two object teeth according to the tool offset, and the parts to be processed of the initial teeth of the two spline teeth are milled with preset milling parameters, and the above steps are repeated until the number of machining cycles is completed.

[0027] Optionally, the angle between the two cutting tools is β, wherein 45°≤β≤180°.

[0028] Optionally, the angle between the two cutting tools is 120°.

[0029] In the technical solution of the present invention, the principle of high-speed synchronous rotary milling is utilized to determine the spatial posture of the tool, and the running trajectory of the tool is determined according to the spatial posture of the tool. The two to-be-processed end portions of the spline teeth of the synchronizer sleeve along the axial direction of the synchronizer sleeve are milled with preset milling parameters to form the spline teeth final teeth, thereby completing the continuous milling of the plum angle of the spline teeth of the synchronizer sleeve, with high processing efficiency and high processing accuracy, which meets the processing technology requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 A schematic flow chart of an embodiment of a method for processing the chamfered corner of a synchronizer gear sleeve provided by the present invention;

[0032] Figure 2 A schematic diagram of the spatial posture of the tool provided by the present invention;

[0033] Figure 3 A schematic diagram of the structure of a tool provided by the present invention;

[0034] Figure 4 A physical picture of the synchronizer gear sleeve plum angle processed in Example 1 of the present invention;

[0035] Figure 5 A physical picture of the synchronizer gear sleeve plum angle processed in Example 2 of the present invention;

[0036] Figure 6 A physical picture of the synchronizer gear sleeve plum angle processed in Example 3 of the present invention;

[0037] Figure 7 A physical picture of the synchronizer gear sleeve plum angle processed in Example 4 of the present invention;

[0038] Figure 8 This is a physical picture of the synchronizer gear sleeve plum angle processed in Example 5 of the present invention.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] In automobile gearboxes, the use of synchronizer shifting not only has the advantages of light shifting, avoiding impact, eliminating noise, and extending gear life, but also enables rapid shifting, improving the power, economy and safety of the car. Therefore, modern cars, especially the shifting mechanisms of sedans, almost all use this device. In the synchronizer structure, the sliding sleeve is a key part. Generally, the sliding sleeve is designed in the form of an involute internal spline. After the synchronizer sleeve shifting action is completed, the internal spline of the sleeve is inserted into the engaging tooth. To prevent gear disengagement, the engaging tooth and the sleeve are combined at the junction to form a tooth-direction inverted cone shape, so that the tangential force of the torque transmitted by the synchronizer during rotation generates an axial force on the inverted surface of the engaging tooth to overcome the gear disengagement force and make the engaged gear firm and reliable. At present, the traditional domestic processing method is: use a special Meijiao machine to process one tooth at a time through a stroke method. After each tooth is processed, it is necessary to go through a circular indexing of the part to process another tooth. For example, a gear sleeve has 60 teeth, which requires 60 indexing and 60 stroke milling. The processing cycle is about 120 seconds, with low processing efficiency and low processing accuracy.

[0044] In view of this, the present invention provides a method for processing the chamfered corner of a synchronizer gear sleeve. Figure 1 The present invention provides a flow chart of an embodiment of the method for processing the chamfered plum corner of a synchronizer gear sleeve. By using this processing method, continuous milling of the plum corner of a gear sleeve with complex structure can be achieved with high processing efficiency and precision, meeting the processing technology requirements. The following mainly describes the processing method for the chamfered plum corner of the synchronizer gear sleeve in combination with specific drawings.

[0045] It should be noted that a plurality of initial spline teeth are formed on the inner side wall of the synchronizer sleeve, each of the initial spline teeth has two end portions to be processed along the axial direction of the synchronizer sleeve, and each of the end portions to be processed has two end surfaces to be processed along the radial direction of the synchronizer. The processing method of the chamfered plum angle of the synchronizer sleeve includes the following processing steps:

[0046] Step S10, obtaining the positions and numbers of the initial teeth of the plurality of spline teeth;

[0047] Step S20, selecting any two non-adjacent initial teeth of the spline teeth as two object teeth;

[0048] Step S30, taking the two end faces to be processed of the two target teeth in different directions as the starting milling positions, and continuously milling the multiple spline teeth on the synchronizer gear sleeve with preset milling parameters to form spline teeth final teeth; wherein the preset milling parameters include preset tool running trajectory parameters.

[0049] In the technical solution of the present invention, the principle of high-speed synchronous rotary milling is utilized to determine the spatial posture of the tool, and the running trajectory of the tool is determined according to the spatial posture of the tool. The two to-be-processed end portions of the spline teeth of the synchronizer sleeve along the axial direction of the synchronizer sleeve are milled with preset milling parameters to form the spline teeth final teeth, thereby completing the continuous milling of the plum angle of the spline teeth of the synchronizer sleeve, with high processing efficiency and high processing accuracy, which meets the processing technology requirements.

[0050] It should be noted that the medium for implementing the processing method of the specific invention is not limited, as long as the processing of the slider groove can be completed. The present invention is mainly based on CNC machine tools for processing. The CNC machine tool includes a computer for controlling the program and a machine tool for processing. The connection method between the computer and the machine tool can refer to the conventional settings in the field, and will not be repeated here.

[0051] In some embodiments, before step S10, the following steps are also included:

[0052] Step S100, obtaining spatial posture values ​​of a plurality of tools to generate a plurality of relative axial positions of the tools;

[0053] Step S110, fitting the relative axial positions of the multiple tools to form multiple simulated tool running trajectories;

[0054] Step S120 , selecting a simulated tool running trajectory that avoids the mutual interference of the tools as a preset tool running trajectory parameter.

[0055] Before step S10, a model of the synchronizer gear sleeve is first established by a 3D modeling software, and all tool space postures (such as the position of the tool in the synchronizer gear sleeve) are simulated on the synchronizer gear sleeve model by using the principle of high-speed synchronous rotary milling. Figure 2As shown), according to the formed tool space posture, the tool state that avoids all the said parallel teeth is selected, and the actual running trajectory of the tool is simulated according to the said tool state of all the said parallel teeth, that is, the actual running trajectory of the tool in the said synchronizer gear sleeve during actual processing, and the preset tool running trajectory parameters are obtained according to the said actual running trajectory. According to the preset tool running trajectory parameters, the tool is designed using 3D modeling software, and the tool drawing is obtained, and then the tool is manufactured according to the tool drawing. The design and modeling process of the tool can refer to the conventional methods in the field, and will not be repeated here. Among them, the shape of the blade end of the tool and the specific structure of the tool can be found in Figure 3 As shown, the processing method of the tool may refer to the conventional method in the art and will not be described in detail here.

[0056] It should be noted that the three-dimensional modeling software is not limited as long as it can perform physical simulation. In this embodiment, the three-dimensional modeling software includes CAM modeling software.

[0057] In some embodiments, when performing step S10, it is specifically performed through the following steps: scanning all the teeth in the synchronizer gear sleeve through the sensor on the CNC machine tool, transmitting the sensor signal to the computer, the computer determines the position of the spline tooth initial tooth through the signal, and controls the tool so that the tool is aligned with any one of the spline tooth initial teeth.

[0058] In some embodiments, the starting milling position is a tooth tip circle of the target tooth.

[0059] In some embodiments, the plurality of relative axial positions of the tools include the relative axial positions of the tools in the A1 axis, B1 axis, Y1 axis, E1 axis, X11 axis, Z11 axis, B2 axis, E2 axis, A2 axis, Y2 axis, X21 axis, Z21 axis, C2 axis, X2 axis and Z2 axis. After repeated research and testing by the inventors, when the tools are in the above positions, it can ensure that any of the initial teeth of the spline teeth can be milled, and it can also avoid accidentally hitting other positions.

[0060] In some embodiments, the preset milling parameters include a rotational speed of the synchronizer sleeve and a rotational speed of the milling tool.

[0061] After step S120, the following steps are included:

[0062] Step S130, obtaining the number of initial teeth of the spline teeth in the synchronizer gear sleeve, and determining the speed ratio of the synchronizer gear sleeve and the tool according to the number of initial teeth of the spline teeth;

[0063] Step S140, obtaining the actual rotation speed of the tool, and taking the actual rotation speed of the tool as the rotation speed of the milling tool.

[0064] Step S150, determining the rotation speed of the synchronizer sleeve according to the rotation speed ratio and the actual rotation speed of the tool.

[0065] In some embodiments, a plurality of parallel teeth are arranged, and the number of teeth of the initial spline teeth is z. According to the number of teeth z of the initial spline teeth and the principle of hypocycloidal milling, the speed ratio of the synchronizer gear sleeve and the tool is determined; wherein, the speed of the synchronizer gear sleeve is n1, and the speed of the tool is n2, n2 / n1=z; in this way, the tool can evenly mill z spline teeth, thereby reducing errors and improving machining accuracy.

[0066] Specifically, in one embodiment, the theoretical number of spline teeth in the synchronizer sleeve is 42, and the speed ratio of the tool and the synchronizer sleeve is set to 42, that is, at this time, the tool evenly mills the initial spline teeth at 42 positions.

[0067] It should be noted that the actual rotation speed of the tool is not limited and can be set according to the specific processing requirements. Specifically, in one embodiment, the actual rotation speed of the tool is obtained according to the linear speed of the tool. The rotation speed of the tool is set to 4200r / min, and the rotation speed of the milling tool is 4200r / min.

[0068] In this embodiment, the speed ratio is 3, and the speed of the milling tool is 4200 r / min. According to n2 / n1=42, it can be concluded that the speed of the synchronizer sleeve is 100 r / min.

[0069] In some embodiments, when performing step S20, any two non-adjacent initial teeth of the spline teeth are first selected as target teeth, wherein the angle between the two target teeth is between 45° and 180°, so as to avoid interference between the two tools during processing; further, after step S20, the following steps are also included:

[0070] Step S210, adjusting the offset of the synchronizer sleeve according to the starting angle of the synchronizer sleeve;

[0071] Step S220 obtains the plum angle processing parameters of the spline teeth, and adjusts the processing angle of the tool according to the plum angle processing parameters and the offset of the synchronizer gear sleeve.

[0072] In this embodiment, it is necessary to adjust the positions of the synchronizer gear sleeve and the tool before processing, adjust the offset of the synchronizer gear sleeve according to the processing technology requirements, and then adjust the processing angle of the tool according to the offset of the synchronizer and the plum angle processing parameters, so that the tool can normally mill the initial teeth of the spline teeth. One purpose of adjusting the starting angle of the synchronizer gear sleeve and the tool is to meet the processing technology requirements, and the other is to avoid the double teeth and prevent the tool from accidentally touching the double teeth during the milling process.

[0073] Furthermore, after step S220, the following steps are also included:

[0074] Step S230, determining the number of teeth of the spline teeth as the number of tool cycles;

[0075] Step S240, obtaining the tooth spacing between two adjacent initial teeth of the spline teeth, and calculating the tool offset according to the tooth spacing.

[0076] In this embodiment, the number of teeth of the initial spline teeth is 42, that is, the two tools need to mill 42 teeth (each tool is responsible for milling one side), so the two tools need to cycle 42 times each. In the actual milling process, the tooth pitch between two adjacent spline teeth is first obtained, and the tool offset is calculated based on the tooth pitch, and the tool offset is input. After the two tools have milled the two target teeth, the two tools are adjusted to the two initial spline teeth adjacent to the two target teeth according to the tool offset, and milling is continued until the processing of the plum angle is completed.

[0077] In some embodiments, step S30 further includes the following steps:

[0078] Step S301, selecting any end face where the end to be processed is located as the processing end face, taking the two end faces to be processed of the two target teeth in different directions as the starting milling positions, and continuously milling the end parts to be processed of the multiple spline teeth of the processing end face with preset milling parameters to form initial spline teeth;

[0079] Step S302, taking the end face where another end to be processed is located as the processing end face, taking the two end faces to be processed in different directions of the two initial spline teeth as the starting milling positions, and continuously milling the end parts to be processed of multiple spline teeth initial teeth of the processing end faces with preset milling parameters to form spline teeth final teeth.

[0080] Furthermore, in some embodiments, the step S302 also includes the following steps: taking the two end faces to be processed of the two object teeth in different directions as the starting milling positions, milling the to-be-processed parts of the two object teeth with preset milling parameters, adjusting the two tools to the spline teeth adjacent to the two object teeth according to the tool offset, milling the to-be-processed parts of the two spline teeth with preset milling parameters, and repeating the above steps until the number of processing cycles is completed.

[0081] In some embodiments, the angle between the two cutting tools is β, wherein 45°≤β≤180°. It should be noted that within the above range, there will be no interference between the two cutting tools, and each of the spline teeth can be milled uniformly to ensure processing efficiency. As a preferred embodiment of this embodiment, the angle is 120°.

[0082] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

[0083] The following embodiments 1 to 5 are all implemented based on the SIEMENS-840D system and are processed using a CNC machine tool with the SIEMENS-840D system. Since the synchronizer gear sleeve is a thin-walled part, in order to avoid clamping deformation, a hydraulic collet clamp is used for clamping. At the same time, in order to achieve automation, an end face airtightness detection device is added to the clamp. It should be noted that the synchronizer gear sleeves used in the following embodiments 1 to 5 are all produced by Shanghai Automotive Transmission Co., Ltd., and the model of the synchronizer gear sleeve is SH25D7M.

[0084] The specific processing procedures of Examples 1 to 5 are as follows:

[0085] ; 1-LEFT

[0086] KONST_1S_LI[1]=-4.5675; ZDL

[0087] KONST_1S_LI[2]=-0.9037;ZLL

[0088] KONST_1S_LI[3]=5.2036;XDL

[0089] KONST_1S_LI[4]=5.0749;XLL

[0090] KONST_1S_LI[5]=3.6473;YDL

[0091] ART_1S_LI[6]=-1.8275;YLL

[0092] ART_1S_LI[7]=-0.8792;ADL

[0093] CONST_1S_LI[8]=0.4671;ALL

[0094] ART_1S_LI[9]=-1.0106;BDL

[0095] ART_1S_LI

[10] =-0.7742;BLL

[0096] ;------------------------------------------

[0097] ;1-RIGHT

[0098] KONST_1S_RE[1]=-3.4743;ZDR

[0099] ART_1S_RE[2]=-1.1659;ZLR

[0100] KONST_1S_RE[3]=5.1339;XDR

[0101] KONST_1S_RE[4]=3.1474;XLR

[0102] KONST_1S_RE[5]=1.8315;YDR

[0103] KONST_1S_RE[6]=-2.5332;YLR

[0104] KONST_1S_RE[7]=-0.379;ADR

[0105] KONST_1S_RE[8]=0.5598;ALR

[0106] KONST_1S_RE[9]=-0.8691;BDR

[0107] KONST_1S_RE

[10] =-0.4698;BLR

[0108] ;=

[0109] ;2-LEFT

[0110] ;= KONST_2S_LI[1]=-4.5675;ZDL

[0111] KONST_2S_LI[2]=-0.9037;ZLL

[0112] KONST_2S_LI[3]=5.2036;XDL

[0113] KONST_2S_LI[4]=5.0749;XLL

[0114] KONST_2S_LI[5]=3.6473;YDL

[0115] ART_2S_LI[6]=-1.8275;YLL

[0116] KONST_2S_LI[7]=-0.8792;ADL

[0117] CONST_2S_LI[8]=0.4671;ALL

[0118] KONST_2S_LI[9]=-1.0106;BDL

[0119] ART_2S_LI

[10] =-0.7742;BLL

[0120] ;------------------------------------------

[0121] ;2-RIGHT

[0122] KONST_2S_RE[1]=-3.4743;ZDR

[0123] KONST_2S_RE[2]=-1.1659;ZLR

[0124] KONST_2S_RE[3]=5.1339;XDR

[0125] KONST_2S_RE[4]=3.1474;XLR

[0126] KONST_2S_RE[5]=1.8315;YDR

[0127] KONST_2S_RE[6]=-2.5332;YLR

[0128] KONST_2S_RE[7]=-0.379;ADR

[0129] KONST_2S_RE[8]=0.5598;ALR

[0130] KONST_2S_RE[9]=-0.8691; BDR

[0131] KONST_2S_RE

[10] =-0.4698;BLR

[0132] ;========================================

[0133] M17

[0134] Comparative Example

[0135] Use a special Meijiao machine to process one tooth at a time through a stroke method, and the specific operation method can be based on the conventional operation in this field.

[0136] Performance Testing

[0137] The synchronizer gear sleeves prepared in Examples 1 to 5 and Comparative Example 1 were tested, and three spline teeth were randomly selected to test their data, which were compared with the processing requirements. The total production time was recorded at the same time. The specific test results are shown in Table 1.

[0138] Table 1 Test results

[0139]

[0140]

[0141]

[0142]

[0143] From Table 1, Figures 4 to 8 It can be concluded that the error of the tooth-jointing processing performed by the processing method provided by the present invention is small. Compared with the comparative example, the tooth-jointing accuracy processed by the processing method of the present invention is higher. At the same time, the processing time is 12 to 15 seconds. Compared with the comparative example, the processing efficiency is increased by about 9 to 10 times.

Claims

1. A method for processing the chamfered corner of a synchronizer gear sleeve, wherein a plurality of spline teeth are formed on the inner side wall of the synchronizer gear sleeve, each of the spline teeth has two end portions to be processed along the axial direction of the synchronizer gear sleeve, and each of the end portions to be processed has two end surfaces to be processed along the radial direction of the synchronizer, characterized in that: The method for processing the chamfered corner of the synchronizer gear sleeve comprises the following processing steps: Obtaining the positions and numbers of the initial teeth of the plurality of spline teeth; Select any two non-adjacent initial teeth of the spline teeth as two object teeth; Taking the two end faces of the two target teeth in different directions as the starting milling positions, the plurality of spline teeth on the synchronizer gear sleeve are continuously milled with preset milling parameters to form spline teeth final teeth; Wherein, the preset milling parameters include preset tool running trajectory parameters; Before the step of obtaining the positions of the plurality of initial teeth of the spline teeth, the following steps are also included: Acquire spatial posture values ​​of multiple tools to generate multiple relative axial positions of the tools; Fitting the relative axial positions of the plurality of tools to form a plurality of simulated tool running trajectories; Selecting a simulated tool running trajectory that avoids interference between all the tools as a preset tool running trajectory parameter; After the step of selecting any two non-adjacent initial teeth of the spline teeth as two object teeth, the following steps are also included: adjusting the offset of the synchronizer sleeve according to the starting angle of the synchronizer sleeve; Obtaining a plum angle processing parameter of the spline tooth, and adjusting a processing angle of the tool according to the plum angle processing parameter and an offset of the synchronizer gear sleeve; After the step of obtaining the plum angle processing parameters of the spline teeth and adjusting the milling angle of the tool according to the plum angle processing parameters and the offset of the synchronizer gear sleeve, the following steps are also included: Determining the number of teeth of the spline teeth as the number of tool cycles; The tooth spacing between two adjacent initial teeth of the spline teeth is obtained, and the tool offset is calculated according to the tooth spacing.

2. The method for processing the chamfered corner of a synchronizer gear sleeve according to claim 1, characterized in that: The multiple relative axial positions of the tools include the relative axial positions of each of the tools in the A1 axis, B1 axis, Y1 axis, E1 axis, X11 axis, Z11 axis, B2 axis, E2 axis, A2 axis, Y2 axis, X21 axis, Z21 axis, C2 axis, X2 axis and Z2 axis.

3. The method for processing the chamfered corner of a synchronizer gear sleeve according to claim 1, characterized in that: The starting milling position is the addendum circle of the target tooth.

4. The method for processing the chamfered corner of a synchronizer gear sleeve according to claim 1, characterized in that: The step of taking the two end faces of the two target teeth in different directions as the starting milling positions and continuously milling the plurality of spline teeth on the synchronizer gear sleeve with preset milling parameters to form the spline teeth final teeth also includes the following steps: Selecting any end face where the end to be processed is located as the processing end face, taking the two end faces to be processed of the two target teeth in different directions as the starting milling positions, and continuously milling the end parts to be processed of the multiple spline teeth of the processing end face with preset milling parameters to form initial spline teeth; Then, the end face where the other end to be processed is located is used as the processing end face, and the two end faces to be processed in different directions of the two initial spline teeth are used as the starting milling positions, and the end parts to be processed of multiple spline teeth initial teeth of the processing end face are continuously milled according to preset milling parameters to form spline teeth final teeth.

5. The method for processing the chamfered corner of a synchronizer gear sleeve according to claim 4, characterized in that: The step of selecting any end face where the end to be processed is located as the processing end face, taking the two end faces to be processed of the two target teeth in different directions as the starting milling positions, and continuously milling the end faces to be processed of the multiple spline teeth of the processing end face with preset milling parameters to form the initial spline teeth also includes the following steps: The two end faces to be processed of the two object teeth in different directions are taken as the starting milling positions, and the end parts to be processed of the two object teeth are milled with preset milling parameters. The two tools are adjusted to the initial teeth of the spline teeth adjacent to the two object teeth according to the tool offset, and the end parts to be processed of the two initial teeth of the spline teeth are milled with preset milling parameters, and the above steps are repeated until the number of machining cycles is completed.

6. The method for processing the chamfered corner of a synchronizer gear sleeve according to claim 1, characterized in that: The angle between the two cutting tools is β, wherein 45°≤β≤180°.

7. The method for processing the chamfered corner of a synchronizer gear sleeve according to claim 6, characterized in that: The angle between the two cutting tools is 120°.

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