A method for processing a synchronizer gear sleeve slide groove

Abstract

The present invention discloses a method for processing a slider groove of a synchronizer gear sleeve, wherein the inner wall of the synchronizer gear sleeve is provided with a plurality of normal teeth and parallel teeth, and the method for processing the slider groove of the synchronizer gear sleeve comprises the following steps: obtaining the position of the parallel teeth; selecting the normal teeth beside the parallel teeth as the target teeth according to the position of the parallel teeth; taking the target teeth as the starting cutting position, cutting the inner wall surface of the synchronizer gear sleeve with preset cutting parameters to form a slider groove; wherein the preset cutting parameters include preset tool running trajectory parameters. The processing method provided by the present invention can realize continuous cutting processing of the slider groove of a gear sleeve with complex structure, and has high processing efficiency and high processing precision, and meets the processing technology requirements.

Description

Technical Field

[0001] The invention relates to the technical field of synchronizer gear sleeves, in particular to the technical field of slider groove processing, and specifically to a method for processing a synchronizer gear sleeve slider groove. 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] Among them, the slider groove of the synchronizer gear sleeve plays a vital role in the automobile shifting process. The traditional processing method of the slider groove of the synchronizer gear sleeve is to use the vertical machining center XY axis linkage milling slide groove. There is interference between the tools during the processing, resulting in a processing cycle of about 90 to 100 seconds, low processing efficiency, and low cutting accuracy. Summary of the invention

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

[0005] To achieve the above object, the present invention proposes a method for processing a synchronizer gear sleeve slider groove, wherein the inner wall of the synchronizer gear sleeve is provided with a plurality of normal teeth and parallel teeth, and the method for processing the synchronizer gear sleeve slider groove comprises the following steps:

[0006] Get the position of the combined teeth;

[0007] According to the position of the combined tooth, a normal tooth beside the combined tooth is selected as the target tooth;

[0008] Taking the target tooth as the starting cutting position, cutting the inner wall surface of the synchronizer gear sleeve with preset cutting parameters to form a slider groove;

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

[0010] Optionally, before the step of obtaining the position of the combined teeth, the following steps are also included:

[0011] Obtain multiple input cycloid parameters to generate multiple simulated tool running trajectories;

[0012] A simulated tool running trajectory that avoids all the combined teeth is selected as the preset tool running trajectory parameter.

[0013] Optionally, the starting cutting position is the tooth top circle of the target tooth.

[0014] Optionally, the parallel gear is provided in plurality, and the preset cutting parameters include the rotation speed of the synchronizer gear sleeve and the rotation speed of the cutting tool;

[0015] Before the step of selecting the normal teeth beside the combined teeth as the target teeth according to the positions of the combined teeth, the following steps are included:

[0016] Obtaining the number of teeth of the combined gear, and determining the speed ratio of the synchronizer gear sleeve and the tool according to the number of teeth of the combined gear;

[0017] Acquiring an actual rotation speed of the tool, and taking the actual rotation speed of the tool as the rotation speed of the cutting tool;

[0018] The rotation speed of the synchronizer sleeve is determined according to the rotation speed ratio and the actual rotation speed of the tool.

[0019] Optionally, the preset cutting parameters also include a starting angle of the synchronizer sleeve and a starting angle of the tool;

[0020] Before the step of cutting the inner wall surface of the synchronizer gear sleeve with the object tooth as the starting cutting position and with the preset cutting parameters to form the slider groove, the method further includes:

[0021] adjusting the offset of the synchronizer sleeve according to the starting angle of the synchronizer sleeve;

[0022] The offset of the tool is adjusted according to the starting angle of the tool.

[0023] Optionally, the preset cutting parameters also include tool feed rate;

[0024] The step of cutting the inner wall surface of the synchronizer gear sleeve with the object tooth as the starting cutting position and with preset cutting parameters to form the slider groove comprises:

[0025] Obtaining the actual processing size of the slider slot, and determining the tool feed amount according to the actual processing size;

[0026] Taking the object tooth as the starting cutting position, the inner wall surface of the synchronizer gear sleeve is cut according to the tool feed amount and the preset tool running trajectory parameters to form a slider groove.

[0027] Optionally, the plurality of parallel teeth are provided, and before the step of taking the object tooth as the starting cutting position and cutting the inner wall surface of the synchronizer gear sleeve with preset cutting parameters to form the slider groove, the following steps are also included:

[0028] Determine the number of slide slots to be processed according to the number of teeth of the parallel teeth;

[0029] Determining the running track of the tool according to the number of the slide slots to be processed;

[0030] The preset tool running trajectory parameters are set according to the running trajectory of the tool.

[0031] Optionally, the preset cutting parameters also include tool cycle processing times and tool feed rate;

[0032] After the step of setting the preset tool running trajectory parameters according to the running trajectory of the tool, the following steps are also included:

[0033] Determine the number of tool cycle processing times according to the number of the slide slots to be processed;

[0034] The actual processing size of the slider slot is obtained, and the tool feed amount for each time is determined according to the number of tool cycle processing times and the actual processing size.

[0035] Optionally, the step of taking the target tooth as the starting cutting position and cutting the inner wall surface of the synchronizer sleeve with preset cutting parameters to form the slider groove comprises:

[0036] Taking the target tooth as the initial cutting position, inputting the tool feed amount for each cutting, cutting the inner wall surface of the synchronizer gear sleeve according to the preset tool running trajectory parameters, and forming a plurality of initial slider grooves;

[0037] Adjust the tool to different initial slider grooves, cut the inner wall surface of the synchronizer gear sleeve according to the preset tool running trajectory parameters based on the tool feed amount each time, and repeat the above steps until the tool cycle processing times are completed to form the slider groove.

[0038] Optionally, in the step of determining the number of slider grooves to be processed according to the number of teeth of the combined teeth: the number of teeth of the combined teeth is three, and the number of slider grooves to be processed is three.

[0039] In the technical solution of the present invention, a special cycloid equation is set by utilizing the cycloid equation rotational milling principle, the cycloid trajectory of the tool is determined according to the cycloid equation, and the inner wall surface of the synchronizer sleeve is cut with preset cutting parameters to form a slider groove, avoiding special positions on the synchronizer sleeve (such as parallel teeth), and controlling the initial cutting position of the tool to effectively avoid the parallel teeth on the synchronizer sleeve, thereby completing the continuous cutting process of the slider groove of the synchronizer sleeve, with high processing efficiency and high processing accuracy, which meets the processing technology requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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.

[0041] Figure 1 A schematic flow chart of an embodiment of a method for processing a synchronizer sleeve slide groove provided by the present invention;

[0042] Figure 2 A schematic diagram of a simulated tool running trajectory provided by the present invention;

[0043] Figure 3 A schematic diagram of the structure of a tool provided by the present invention;

[0044] Figure 4 A physical picture of the synchronizer gear sleeve slider groove processed in Example 1 of the present invention;

[0045] Figure 5 A physical picture of the synchronizer gear sleeve slider groove processed in Example 2 of the present invention;

[0046] Figure 6 A physical picture of the synchronizer gear sleeve slider groove processed in Example 3 of the present invention;

[0047] Figure 7 A physical picture of the synchronizer gear sleeve slider groove processed in Example 4 of the present invention;

[0048] Figure 8 This is a physical picture of the synchronizer gear sleeve slider groove processed in Example 5 of the present invention. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] 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.

[0052] In automobile gearboxes, the use of synchronizer shifting not only has the advantages of light shifting, avoiding impact, eliminating noise, and extending the life of gears, but also enables rapid shifting, improving the power, economy and safety of the automobile. Therefore, modern automobiles, 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 the gear from being disengaged, the tooth direction inverted cone shape is made at the combined part of the engaging tooth and the sleeve, so that the tangential force of the torque transmitted by the synchronizer during the rotation process generates an axial force on the inverted surface of the engaging tooth to overcome the disengagement force and make the engaged gear firm and reliable; Among them, the slider groove of the synchronizer sleeve plays a vital role in the automobile shifting process. The traditional processing method of the slider groove of the synchronizer sleeve is to use the XY axis linkage milling slide groove of the vertical machining center. There is interference between the tools during the processing, resulting in a processing cycle of about 90 to 100 seconds, low processing efficiency, and low cutting precision.

[0053] In view of this, the present invention provides a method for processing a synchronizer gear sleeve slider groove. Figure 1 An embodiment of the processing method of the synchronizer gear sleeve slider groove provided by the present invention can realize continuous cutting processing of the slider groove of the gear sleeve with complex structure through processing by this processing method, and has high processing efficiency and high processing accuracy, and meets the processing technology requirements; the processing method of the synchronizer gear sleeve slider groove is mainly explained below in combination with specific drawings.

[0054] The inner wall of the synchronizer gear sleeve is provided with a plurality of normal teeth and parallel teeth; the processing method of the synchronizer gear sleeve slide groove comprises the following steps:

[0055] Step S10, obtaining the position of the combined teeth;

[0056] Step S20, selecting a normal tooth beside the combined tooth as a target tooth according to the position of the combined tooth;

[0057] Step S30, taking the target tooth as the starting cutting position, cutting the inner wall surface of the synchronizer gear sleeve with preset cutting parameters to form a slider groove, wherein the preset cutting parameters include preset tool running trajectory parameters.

[0058] In the technical solution of the present invention, a special cycloid equation is set by utilizing the cycloid equation rotational milling principle, the cycloid trajectory of the tool is determined according to the cycloid equation, and the inner wall surface of the synchronizer sleeve is cut with preset cutting parameters to form a slider groove, avoiding special positions on the synchronizer sleeve (such as parallel teeth), and controlling the initial cutting position of the tool to effectively avoid the parallel teeth on the synchronizer sleeve, thereby completing the continuous cutting process of the slider groove of the synchronizer sleeve, with high processing efficiency and high processing accuracy, which meets the processing technology requirements.

[0059] 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.

[0060] In some embodiments, before step S10, the following steps are also included:

[0061] Step S100, obtaining a plurality of input cycloid parameters to generate a plurality of simulated tool running trajectories;

[0062] Step S110 selects a simulated tool running trajectory that avoids all the double teeth as a preset tool running trajectory parameter.

[0063] Before step S10, a model of the synchronizer gear sleeve is first established by a three-dimensional modeling software, and all tool running trajectories are simulated on the synchronizer gear sleeve model using the cycloid equation rotational cutting principle. According to the formed tool running trajectory, a tool running trajectory that avoids all the combined teeth is selected. The tool running trajectory that avoids all the combined teeth is the actual running trajectory of the tool in the synchronizer gear sleeve during actual processing (such as Figure 2 As shown in the figure, the preset tool running trajectory parameters are obtained according to the actual running trajectory, the tool is designed using 3D modeling software according to the preset tool running trajectory parameters, 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 described here one by one. 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.

[0064] 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.

[0065] 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, finding the combined teeth according to the difference characteristics between the combined teeth and the normal teeth, transmitting the signal to the computer, the computer determines the position of the combined teeth through the signal, and controls the tool so that the tool is aligned with any one of the normal teeth.

[0066] In some embodiments, the starting cutting position is the addendum circle of the object tooth.

[0067] In some embodiments, the preset cutting parameters include a rotational speed of the synchronizer sleeve and a rotational speed of the cutting tool.

[0068] Before step S20, the following steps are included:

[0069] Step S201, obtaining the number of teeth of the combined gear, and determining the speed ratio of the synchronizer gear sleeve and the tool according to the number of teeth of the combined gear.

[0070] In some embodiments, the parallel teeth are provided in plurality, the number of teeth of the parallel teeth is z, the number of teeth of the parallel teeth is g, and the speed ratio of the synchronizer gear sleeve and the tool is determined according to the number of teeth z of the normal teeth, the number of teeth g of the parallel teeth and the hypocycloid cutting principle; wherein the speed of the synchronizer gear sleeve is n 1 , the speed of the tool is n 2 , n 2 / n 1=g; in this way, the tool can evenly cut g spline teeth, thereby reducing errors and improving machining accuracy.

[0071] Specifically, in one embodiment, the theoretical number of spline teeth in the synchronizer gear sleeve is 42, there are three parallel teeth, the parallel teeth occupy 2 normal tooth positions, the 3 parallel teeth are evenly distributed in 3 places, the number of normal teeth is 12x3, there are 13 normal teeth between the 2 parallel teeth, and according to the cycloid equation principle, the number of teeth g of the parallel teeth is 3, and the speed ratio of the tool and the synchronizer gear sleeve is set to 3, that is, the tool evenly cuts the three normal teeth at this time.

[0072] Step S202: Acquire the actual rotation speed of the tool, and take the actual rotation speed of the tool as the rotation speed of the cutting tool.

[0073] 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 1200r / min, and the rotation speed of the cutting tool is 1200r / min.

[0074] Step S203: determining the rotation speed of the synchronizer sleeve according to the rotation speed ratio and the actual rotation speed of the tool.

[0075] In this embodiment, the speed ratio is 3, and the speed of the cutting tool is 1200 r / min. 2 / n 1 =3, it can be concluded that the rotational speed of the synchronizer sleeve is 400r / min.

[0076] In some embodiments, the preset cutting parameters also include a starting angle of the synchronizer sleeve and a starting angle of the tool;

[0077] Before step S30, the method further includes:

[0078] Step S300, adjusting the offset of the synchronizer sleeve according to the starting angle of the synchronizer sleeve;

[0079] Step S310: adjusting the offset of the tool according to the starting angle of the tool.

[0080] In this embodiment, it is necessary to adjust the positions of the synchronizer gear sleeve and the tool before processing. According to the processing technology requirements, the starting angle of the synchronizer gear sleeve is adjusted, and the starting angle of the tool is adjusted at the same time, so that the tool cuts from the normal teeth. One purpose of adjusting the starting angle of the synchronizer gear sleeve and the starting angle of 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 cutting process.

[0081] In some embodiments, the preset cutting parameters also include a tool feed rate, and the tool feed rate is adjusted according to actual machining process requirements so that cutting can proceed normally.

[0082] Furthermore, the processing method of the slider groove is not limited and can be selected according to actual processing requirements. In some embodiments, in order to ensure processing efficiency, one-time processing is selected. Specifically, step S30 further includes the following steps:

[0083] Step S301, obtaining the actual processing size of the slider slot, and determining the tool feed amount according to the actual processing size.

[0084] The processing technology of the slider groove of the synchronizer gear sleeve requires: the depth of the slider groove is 3.5mm (the depth of the slider groove is equal to the height of the steel ball) and the position accuracy is 0.1mm; according to the processing technology requirements, the tool feed amount is input into the CNC machine tool, and the tool feed amount is adjusted so that the tool can be successfully processed in one time.

[0085] Step S302: Taking the target tooth as the starting cutting position, cutting the inner wall surface of the synchronizer gear sleeve according to the tool feed amount and the preset tool running trajectory parameters to form a slider groove.

[0086] It should be noted that when performing step S302, it is necessary to first determine the number of slider grooves to be processed, and determine the cutting route according to the number of slider grooves. In this embodiment, the number of slider grooves to be processed is three, and the cutting route of the tool is determined according to Figure 2 The cycloid trajectory shown in the figure runs, and the tool running trajectory parameters obtained are input into the CNC machine tool, and then the object tooth is used as the starting cutting position to start the cutting process, cutting the inner wall surface of the synchronizer gear sleeve, and the tool cuts one circle according to the cycloid trajectory to complete the processing of the slider groove. Such a setting can effectively improve the processing efficiency.

[0087] In some other embodiments, before step S30, the following steps are also included:

[0088] Step S320, determining the number of slider grooves to be processed;

[0089] Step S330, determining the running trajectory of the tool according to the number of the slide slots to be processed;

[0090] Step S340: setting the preset tool running trajectory parameters according to the running trajectory of the tool.

[0091] Furthermore, it is necessary to determine the number of slider grooves to be processed first, and determine the cutting route according to the number of slider grooves. In this embodiment, the number of slider grooves to be processed is three, and the cutting route of the tool is determined according to Figure 2 The cycloid trajectory shown in the figure can be used to obtain the running trajectory of the tool.

[0092] Furthermore, the preset cutting parameters also include the number of tool cycle processing times and the tool feed rate; in this embodiment, in order to ensure cutting accuracy, the cutting position needs to be adjusted multiple times to reduce errors, so the number of tool cycle processing times and the tool feed rate need to be determined according to the number of slider grooves to be processed.

[0093] After step S340, the following steps are also included:

[0094] Step S350, determining the number of tool cycle processing times according to the number of the slide slots to be processed;

[0095] Step S360, obtaining the actual processing size of the slider slot, and determining the tool feed amount for each time according to the number of tool cycle processing times and the actual processing size.

[0096] In some embodiments, the number of slider grooves to be processed is three, so the number of cycles of the tool is three. For example, the processing process of the slider groove of the synchronizer gear sleeve requires: the depth of the slider groove is 3.5mm (steel ball height) and the position accuracy is 0.1mm; each time the tool feed amount is 0.05-0.2mm / r, and the tool continuously repeats the cycloid cycle three times to achieve the processing of the slider groove.

[0097] Specifically, during actual processing, step S30 may be performed according to the following steps:

[0098] Step S301, taking the target tooth as the initial cutting position, inputting the tool feed amount for each time, cutting the inner wall surface of the synchronizer gear sleeve according to the preset tool running trajectory parameters, and forming a plurality of initial slider grooves;

[0099] Step S302, adjust the tool to different initial slider grooves, cut the inner wall surface of the synchronizer gear sleeve according to the preset tool running trajectory parameters according to the tool feed amount each time, and repeat the above steps until the tool cycle processing times are completed to form the slider groove.

[0100] To facilitate the description of step S301 and step S302, a standard synchronizer sleeve model SH25D7M produced by Shanghai Automotive Transmission Co., Ltd. is taken as an example for explanation, that is, three slider grooves are formed in the synchronizer sleeve, and the three slider grooves are respectively formed on the first normal tooth, the second normal tooth and the third normal tooth. The processing technology requirements of the slider groove are: the depth of the slider groove is 3.5mm (steel ball height) and the position accuracy is 0.1mm.

[0101] In actual operation, the following steps are followed: adjust the tool so that it is aligned with the first normal tooth, take the first normal tooth as the target tooth, input a cutting depth of about 1.5mm [(steel ball highest point diameter-tooth root circle diameter) / 2], cut the inner wall surface of the synchronizer gear sleeve according to the preset tool running trajectory parameters, and form the first initial slider groove, the second initial slider groove and the third initial slider groove on the first normal tooth, the second normal tooth and the third normal tooth in turn; adjust the tool so that the tool is aligned with the second initial slider groove, at this time, take the second initial slider groove as the initial cutting position, adjust the tool feed, cut the inner wall surface of the synchronizer gear sleeve again according to the preset tool running trajectory parameters, continuously cycle to deepen the depth of the first initial slider groove, the second initial slider groove and the third initial slider groove, and finally form three identical slider grooves at the same time (the number of cycles depends on the previous feed per revolution of 0.05-0.2). The purpose of such a setting is to facilitate the adjustment of the angle of the tool and the synchronizer gear sleeve, avoid the workpiece offset caused by the vibration of the CNC machine tool during the processing, and thus improve the processing accuracy.

[0102] It should be noted that the number of the slider grooves is not limited and can be selected according to actual needs. For standard parts, the number of teeth of the parallel teeth in the synchronizer sleeve is generally three, so the number of slider grooves to be processed is also three. In some embodiments, the three parallel teeth are evenly distributed on the inner wall of the synchronizer sleeve, and the angle between two adjacent parallel teeth is 120°. One slider groove is set between each two adjacent parallel teeth, and the slider groove is located in the middle of the two parallel teeth, that is, the angle between each two adjacent slider grooves is also 120°. In this way, it can be ensured that the tool can achieve continuous cutting processing, evenly cut the three slider grooves, increase processing efficiency, and improve processing accuracy.

[0103] 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.

[0104] 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.

[0105] The specific processing procedures of Examples 1 to 5 are as follows:

[0106] EGOFS(E3);

[0107] EGDEL(E3);

[0108] STOPRE

[0109] EGDEF(E3,C1,1);

[0110] STOPRE;

[0111] EGONSYN(E3,"FINE",0,C1,C_POS_RN,3,1)

[0112] STOPRE

[0113] M40

[0114] DO MOV[C1]=1FA[C1]=PAR

[120] ;1200*300

[0115] ;M0

[0116] G90 G0 X1=X_VORPOS_RN

[0117] Z1=0+Z_POS_RN M711;

[0118] G90 G1 X1=X_POS_RN F15

[0119] G04F0.35

[0120] G90 G0 X1=X_VORPOS_RN

[0121] STOPRE

[0122] M701

[0123] DO MOV[C1]=0

[0124] STOPRE

[0125] EGOFS(E3);

[0126] EGDEL(E3); STOPRE

[0127] M41

[0128] ;G90 G1 Z1=0F1000

[0129] STOPRE

[0130] M17

[0131] Comparative Example

[0132] Use the vertical machining center to mill the slide slot in XY axis linkage, and the specific operation method can be based on the conventional operation in this field.

[0133] Performance Testing

[0134] The synchronizer sleeves prepared in Examples 1 to 5 and Comparative Example 1 were tested, and the depth and width dimensions of the three slider grooves in the synchronizer sleeves were tested respectively, compared with the processing requirements, and the total production time was recorded. The specific test results are shown in Table 1.

[0135] Table 1 Test results

[0136]

[0137]

[0138] From Table 1, Figures 4 to 8 It can be concluded that the error of the slider groove processing by the processing method provided by the present invention is small. Compared with the comparative example, the slider groove processed by the processing method of the present invention has higher precision. At the same time, the processing time is 8 to 10 seconds. Compared with the comparative example, the processing efficiency is improved by about 9 to 10 times.

Claims

1. A method for processing a slider groove of a synchronizer gear sleeve, wherein the inner wall of the synchronizer gear sleeve is provided with a plurality of normal teeth and parallel teeth, characterized in that: The processing method of the synchronizer gear sleeve slider groove comprises the following steps: Get the position of the combined teeth; According to the position of the combined tooth, a normal tooth beside the combined tooth is selected as the target tooth; Taking the target tooth as the starting cutting position, cutting the inner wall surface of the synchronizer gear sleeve with preset cutting parameters to form a slider groove; Wherein, the preset cutting parameters include preset tool running trajectory parameters; Before the step of obtaining the position of the combined teeth, the method further includes the following steps: Obtain multiple input cycloid parameters to generate multiple simulated tool running trajectories; Selecting a simulated tool running trajectory that avoids all the combined teeth as a preset tool running trajectory parameter; The plurality of parallel teeth are provided, and the preset cutting parameters include the rotation speed of the synchronizer gear sleeve and the rotation speed of the cutting tool; Before the step of selecting the normal teeth beside the combined teeth as the target teeth according to the positions of the combined teeth, the following steps are included: Acquiring the number of teeth of the combined gear, and determining the speed ratio of the synchronizer gear sleeve and the tool according to the number of teeth of the combined gear; Acquiring an actual rotation speed of the tool, and taking the actual rotation speed of the tool as the rotation speed of the cutting tool; Determining the speed of the synchronizer sleeve according to the speed ratio and the actual speed of the tool; The preset cutting parameters also include the starting angle of the synchronizer sleeve and the starting angle of the tool; Before the step of cutting the inner wall surface of the synchronizer gear sleeve with the object tooth as the starting cutting position and with the preset cutting parameters to form the slider groove, the method further includes: adjusting the offset of the synchronizer sleeve according to the starting angle of the synchronizer sleeve; The offset of the tool is adjusted according to the starting angle of the tool.

2. The method for processing the synchronizer sleeve slider groove according to claim 1, characterized in that: The starting cutting position is the tooth top circle of the target tooth.

3. The method for processing the synchronizer sleeve slide groove according to claim 1, characterized in that: The preset cutting parameters also include tool feed rate; The step of cutting the inner wall surface of the synchronizer gear sleeve with the object tooth as the starting cutting position and with preset cutting parameters to form the slider groove comprises: Obtaining the actual processing size of the slider slot, and determining the tool feed amount according to the actual processing size; Taking the object tooth as the starting cutting position, the inner wall surface of the synchronizer gear sleeve is cut according to the tool feed amount and the preset tool running trajectory parameters to form a slider groove.

4. The method for processing the synchronizer sleeve slide groove according to claim 1, characterized in that: The plurality of parallel teeth are provided, and before the step of cutting the inner wall surface of the synchronizer gear sleeve with the object tooth as the starting cutting position and with the preset cutting parameters to form the slider groove, the following steps are also included: Determine the number of slide slots to be processed according to the number of teeth of the parallel teeth; Determining the running track of the tool according to the number of the slide slots to be processed; The preset tool running trajectory parameters are set according to the running trajectory of the tool.

5. The method for processing the synchronizer sleeve slider groove according to claim 4, characterized in that: The preset cutting parameters also include tool cycle processing times and tool feed rate; After the step of setting the preset tool running trajectory parameters according to the running trajectory of the tool, the following steps are also included: Determine the number of tool cycle processing times according to the number of the slide slots to be processed; The actual processing size of the slider slot is obtained, and the tool feed amount for each time is determined according to the number of tool cycle processing times and the actual processing size.

6. The method for processing the synchronizer sleeve slider groove according to claim 5, characterized in that: The step of cutting the inner wall surface of the synchronizer gear sleeve with the object tooth as the starting cutting position and with preset cutting parameters to form the slider groove comprises: Taking the target tooth as the initial cutting position, inputting the tool feed amount for each cutting, cutting the inner wall surface of the synchronizer gear sleeve according to the preset tool running trajectory parameters, and forming a plurality of initial slider grooves; Adjust the tool to different initial slider grooves, cut the inner wall surface of the synchronizer gear sleeve according to the preset tool running trajectory parameters based on the tool feed amount each time, and repeat the above steps until the tool cycle processing times are completed to form the slider groove.

7. The method for processing the synchronizer sleeve slider groove according to claim 4, characterized in that: In the step of determining the number of the slider grooves to be processed according to the number of teeth of the combined teeth: the number of teeth of the combined teeth is three, and the number of the slider grooves to be processed is three.

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