A workpiece polishing method for a sun gear of a planetary reducer

Abstract

The application relates to the technical field of internal gear polishing, in particular to a workpiece polishing processing method for an internal gear of a planetary reducer, which comprises the following steps: in the process of polishing any internal gear workpiece by using a polishing device, pressure data of abrasive grains at the outlet end and the inlet end of the internal gear workpiece are collected in real time; presetting the extrusion pressure of the abrasive grains in the polishing device at each adjustment time, for the time period between each adjustment time and the adjacent previous adjustment time, combining the change condition of the pressure data difference degree between the outlet end and the inlet end in the time period and the data jitter degree, a gentle coefficient of each adjustment time is obtained; the extrusion pressure adjustment value of each adjustment time is obtained, and the extrusion pressure of the abrasive grains in the polishing device is adjusted. The application aims to accurately control the extrusion pressure of the abrasive grains in the polishing device, avoid over-polishing or under-polishing, and thus ensure the final polishing processing quality of the internal gear workpiece.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of internal gear polishing, in particular to a workpiece polishing machining method for an internal gear of a planetary reducer. BACKGROUND

[0002] The planetary reducer is a precision reducer composed of a planetary gear, a sun gear and an internal gear, and is usually used for being installed on a servo motor to reduce the rotating speed and increase the torque. The internal gear is one of the core parts of the planetary reducer, and the machining precision of the internal gear affects the overall performance of the planetary reducer. The polishing machining step is an important step in the machining process of the internal gear, which can effectively reduce burrs on the surface of the internal gear workpiece and reduce the roughness, thereby improving the appearance quality of the internal gear product.

[0003] The abrasive flow polishing machining technology is a commonly used internal gear polishing machining method at present, which has the advantages of no restriction on the structure and material of the workpiece, high machining efficiency and low cost. However, when the abrasive flow polishing machining technology is used to polish a batch of internal gear workpieces of a certain specification, the polishing machining parameters such as the extrusion pressure of the abrasive particles are usually obtained by simulating the gear workpiece of the same specification, such as CFD (Computational Fluid Dynamics) simulation, and the same polishing machining parameters are used to polish different internal gear workpieces of the same specification. However, due to the differences in the blank geometry of different internal gear workpieces and the actual machining errors in the machining process steps before polishing, the internal gear workpiece machining method using uniform polishing machining parameters cannot adapt to the actual polishing machining process of the internal gear workpiece, which leads to over-polishing or under-polishing during the polishing of the internal gear workpiece, thereby affecting the polishing machining quality of the internal gear workpiece. SUMMARY

[0004] In view of the above, it is necessary to provide a workpiece polishing machining method for an internal gear of a planetary reducer. Compared with the traditional workpiece polishing machining method for the internal gear of the planetary reducer, the extrusion pressure of the abrasive particles in the polishing equipment is accurately controlled to avoid over-polishing or under-polishing, thereby ensuring the final polishing machining quality of the internal gear workpiece.

[0005] The workpiece polishing machining method for the internal gear of the planetary reducer provided by the application adopts the following technical scheme:

[0006] One embodiment of the application provides a workpiece polishing machining method for an internal gear of a planetary reducer, which comprises the following steps:

[0007] In the process of polishing any internal gear workpiece using the polishing equipment, the pressure data of the abrasive particles at the outlet and inlet ends of the any internal gear workpiece are collected in real time;

[0008] The change gentle factor of each adjustment moment is obtained by a change of a difference degree of pressure data between the outlet end and the inlet end in the time period between each adjustment moment and an adjacent previous adjustment moment, and a change gentle factor of each adjustment moment is obtained by a data jitter degree of the difference degree, and a gentle coefficient of each adjustment moment is obtained by combining the change gentle factor and the change gentle factor.

[0009] The change gentle factor of each adjustment moment is obtained by a change of a difference degree of pressure data between the outlet end and the inlet end in the time period between each adjustment moment and an adjacent previous adjustment moment, and a change gentle factor of each adjustment moment is obtained by a data jitter degree of the difference degree, and a gentle coefficient of each adjustment moment is obtained by combining the change gentle factor and the change gentle factor.

[0010] In one embodiment, the change gentle factor is obtained by:

[0011] A difference value of pressure data between the outlet end and the inlet end at each sampling moment is calculated to obtain a trend item of the difference value at all sampling moments in the time period.

[0012] The change gentle factor of each adjustment moment is obtained by a change of a difference degree of pressure data between the outlet end and the inlet end in the time period between each adjustment moment and an adjacent previous adjustment moment, and a change gentle factor of each adjustment moment is obtained by a data jitter degree of the difference degree, and a gentle coefficient of each adjustment moment is obtained by combining the change gentle factor and the change gentle factor.

[0013] In one embodiment, the change gentle factor is a mean value of all data in the trend item.

[0014] In one embodiment, the change gentle factor is obtained by:

[0015] A difference amount between the difference value at each sampling moment and corresponding data in the trend item is calculated.

[0016] The change gentle factor is obtained by a distribution of the difference amount at all sampling moments in the time period.

[0017] In one embodiment, the change gentle factor is a mean value of the difference amount at all sampling moments in the time period.

[0018] In one embodiment, the gentle coefficient is a mean value of the change gentle factor and the change gentle factor.

[0019] In one embodiment, the change gentle factor is obtained by:

[0020] A difference value between the preset maximum value and the preset minimum value is calculated.

[0021] A parameter adjustment factor of each adjustment moment is obtained by combining the difference value and the gentle coefficient.

[0022] The extrusion pressure adjustment value is positively correlated with the parameter adjustment factor and the preset minimum value respectively.

[0023] In one embodiment, the parameter adjustment factor is the result of rounding the product of the difference and the gentle coefficient.

[0024] In one embodiment, the extrusion pressure adjustment value is the sum of the parameter adjustment factor and the preset minimum value.

[0025] In one embodiment, the adjustment of the extrusion pressure of the abrasive particles in the polishing equipment within the time interval between each adjustment time and its adjacent next adjustment time comprises:

[0026] The extrusion pressure adjustment value at each adjustment time is used as the value of the extrusion pressure of the abrasive particles in the polishing equipment used by the any internal gear workpiece within the time interval between each adjustment time and its adjacent next adjustment time.

[0027] The present application has at least the following beneficial effects:

[0028] The present application obtains the change gentle factor through the change of the difference between the pressure data, can indirectly reflect the roughness of the tooth groove wall surface according to the influence of the roughness of the tooth groove wall surface of the internal gear workpiece on the change of the pressure difference, can effectively evaluate the roughness change of the tooth groove wall surface of the internal gear workpiece in the polishing process, and provide a reference basis for subsequent adjustment of the extrusion pressure of the abrasive particles in the polishing equipment; further, considering that the change of the roughness of the tooth groove wall surface of the internal gear workpiece will affect the data jitter degree of the pressure difference, the roughness of the tooth groove wall surface of the internal gear workpiece is evaluated through the data jitter degree of the pressure difference, and the gentle coefficient is obtained by combining the change gentle factor, the roughness of the tooth groove wall surface of the internal gear workpiece after being subjected to the cutting action of the abrasive particles in the polishing equipment is more comprehensively evaluated, the accuracy of the roughness evaluation of the tooth groove wall surface of the internal gear workpiece is improved, and a more reliable basis is provided for subsequent adjustment of the extrusion pressure of the abrasive particles in the polishing equipment.

[0029] Further, the value of the extrusion pressure of the abrasive particles in the polishing equipment used by the internal gear workpiece in the subsequent polishing process is adjusted by using the extrusion pressure adjustment value obtained by using the gentle coefficient, the extrusion pressure of the abrasive particles in the polishing equipment can be accurately controlled, the change of the extrusion pressure of the abrasive particles in the polishing equipment matches the change of the roughness of the tooth groove surface of the internal gear workpiece, and thus the over-polishing or under-polishing caused by the excessive or insufficient extrusion pressure of the abrasive particles in the polishing equipment during the subsequent polishing processing of the internal gear workpiece is effectively avoided, and the final polishing processing quality of the internal gear workpiece is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, and the advantages thereof, simple descriptions will be given to the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0031] Figure 1 A step flow chart of a workpiece polishing processing method of an internal gear of a planetary reducer is provided in the present application.

[0032] Figure 2 An acquisition flowchart of a gentle change factor is provided.

[0033] Figure 3 An acquisition flowchart of an extrusion pressure adjustment value is provided. DETAILED DESCRIPTION

[0034] In the description of the embodiments of the present application, the words "exemplary", "or", "for example", and the like are used to represent an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "exemplary", "or", "for example" and the like is intended to present the relevant concept in a specific manner.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which the present application belongs. The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. It should be understood that, in the present application, unless otherwise specified, " / " means or.

[0036] In addition, it should be noted that the terms "first", "second" in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0037] The specific scheme of the workpiece polishing processing method of the internal gear of the planetary reducer provided by the present application will be specifically described below in combination with the drawings.

[0038] An embodiment of the present application provides a workpiece polishing processing method of an internal gear of a planetary reducer. Specifically, the following workpiece polishing processing method of an internal gear of a planetary reducer is provided. Please refer to Figure 1 The method comprises the following steps:

[0039] Step 1. In the process of polishing any internal gear workpiece using a polishing device, the pressure data of abrasive particles at the inlet and outlet ends of the any internal gear workpiece are collected in real time.

[0040] In this embodiment, the steps of the machining process of the planetary reducer inner gear are as follows:

[0041] (1) Blank preparation: The blank used to manufacture the planetary reducer inner gear is heat treated to enhance the hardness of the blank and eliminate internal stress;

[0042] (2) Rough machining: The blank obtained by step (1) is rough machined using a numerical control machine tool to remove most of the excess material in the blank, convert the blank into a preliminary inner gear shape, and obtain an inner gear blank of the required size;

[0043] (3) Quenching treatment: The inner gear blank obtained by step (2) is quenched to improve the strength and toughness of the inner gear blank;

[0044] (4) Broaching finishing: The inner gear blank is finished using a broaching device to machine the tooth profile of the inner gear to ensure that it meets the requirements;

[0045] (5) Gas carburizing treatment: The inner gear workpiece obtained after the broaching finishing treatment of step (4) is subjected to gas carburizing treatment to improve the wear resistance and strength of the inner gear workpiece;

[0046] (6) Polishing: The surface of the inner gear workpiece obtained after the gas carburizing treatment of step (5) is polished using a polishing device to remove burrs on the surface of the inner gear workpiece and reduce the surface roughness, achieving the purpose of improving the appearance quality of the finished inner gear. The polishing device is a abrasive flow polisher.

[0047] To avoid over-polishing or under-polishing of the inner gear during the polishing process, the extrusion pressure of the abrasive particles in the polishing device during the abrasive flow polishing process of the inner gear workpiece is dynamically adjusted so that the extrusion pressure of the abrasive particles in the polishing device changes with the change in the roughness of the tooth groove surface of the inner gear workpiece during the actual polishing process, thereby improving the final polishing processing quality of the inner gear workpiece.

[0048] Taking any inner gear workpiece in any production batch of planetary reducer inner gears as an example, through the pressure sensors installed at the outlet and inlet ends of the sleeve of the workpiece clamp of the polishing device, the pressure data of the abrasive particles at the outlet and inlet ends of the any inner gear workpiece during the polishing process of the any inner gear workpiece by the polishing device are collected in real time, which is used to monitor the dynamic pressure change of the abrasive particles at the outlet and inlet ends of the inner gear workpiece during the polishing process of the any inner gear.

[0049] In this embodiment, the sampling frequency of the pressure sensor is set to 10 Hz, and the sampling frequency of the pressure sensor is preset by humans, and the implementer can set it according to the actual situation, and the present application does not make special limitations.

[0050] Further, the preset adjustment time of the extrusion pressure of the abrasive particles in the polishing equipment, the extrusion pressure of the abrasive particles in the polishing equipment is adjusted at each adjustment time.

[0051] In this embodiment, the time interval between the two adjacent adjustment times is set to 10s, and the value of the time interval is preset by human, and the implementer can set it according to the actual situation, and this application does not make special limitation. The third second after the polishing equipment is started is taken as the first adjustment time, and the extrusion pressure of the abrasive particles in the polishing equipment is not adjusted at the first adjustment time.

[0052] Further, taking any adjustment time and the time period between it and the adjacent previous adjustment time as an example, the pressure data of the abrasive particles at the outlet and the inlet collected in the time period are normalized respectively to reduce the influence of the pressure data collected in different time periods on subsequent data processing due to different numerical scales.

[0053] In this embodiment, the purpose of normalizing the pressure data of the abrasive particles at the outlet and the inlet respectively is achieved by calculating the ratio of the pressure data of the abrasive particles at each outlet and inlet to the upper limit value of the range of the pressure sensor used.

[0054] Step 2, preset the adjustment time of the extrusion pressure of the abrasive particles in the polishing equipment, for the time period between each adjustment time and its adjacent previous adjustment time, obtain the change gentle factor of each adjustment time through the change of the difference degree of the pressure data between the outlet and the inlet in the time period, and obtain the gentle coefficient of each adjustment time by combining the change gentle factor of each adjustment time obtained through the data jitter degree of the difference degree.

[0055] The abrasive particle flow polishing technology is a polishing technology for making the workpiece surface in the extrusion clamp of the semi-solid abrasive particle medium under a certain extrusion pressure. When the extrusion pressure of the abrasive particle medium is small, the cutting effect of the abrasive particles on the workpiece surface will be weak, which is easy to cause the rough workpiece surface to appear under polishing, so that the roughness of the workpiece surface does not reach the predetermined effect. When the extrusion pressure is large, the cutting effect of the abrasive particles will be strong, which is easy to cause the rough workpiece surface to appear over polishing and produce scratches. Therefore, when the polishing equipment is used to polish the internal gear workpiece, the change of the extrusion pressure of the abrasive particles in the polishing equipment should match the change of the roughness of the tooth groove surface of the internal gear workpiece.

[0056] In the process of polishing the inner gear workpiece by using the polishing equipment, when the abrasive particles enter the tooth groove of the inner gear workpiece, a large number of abrasive particles will collide with the tooth groove wall surface, part of the kinetic energy of the abrasive particles will be converted into cutting energy for cutting and removing the excess material of the tooth groove wall surface, and the rough wall surface of the tooth groove will disturb the flow of the abrasive particles, thereby increasing the turbulence degree of the abrasive particles in flow, causing the increase of the kinetic energy dissipation of the abrasive particles in the tooth groove of the inner gear workpiece, and further causing the decrease of the dynamic pressure of the abrasive particles in the tooth groove of the inner gear workpiece. The tooth groove wall surface of the inner gear workpiece will gradually become smooth with the progress of the polishing process, causing the dynamic pressure of the abrasive particles at the outlet end of the inner gear workpiece to gradually increase with the decrease of the roughness of the tooth groove wall surface of the inner gear workpiece, and causing the pressure difference between the dynamic pressures of the abrasive particles at the outlet end and the inlet end of the inner gear workpiece to gradually decrease with the decrease of the roughness of the tooth groove wall surface of the inner gear workpiece.

[0057] Based on the above analysis, the difference values between the pressure data at the outlet end and the inlet end at each sampling time are calculated respectively, and the difference values at all sampling times in the time period are arranged in time sequence to form the pressure difference time sequence of any adjustment time, which is used to evaluate the change of the pressure difference between the dynamic pressures of the abrasive particles at the outlet end and the inlet end of the inner gear workpiece with time when the inner gear workpiece is polished in the time period.

[0058] In the embodiment, the difference value between the pressure data is the absolute value of the difference.

[0059] Since the roughness of each position of the tooth groove wall surface of the inner gear workpiece before polishing is usually inconsistent, the abrasive particles in the polishing equipment will be disturbed unevenly by the rough tooth groove wall surface when flowing through the tooth groove of the inner gear workpiece, causing the dynamic pressure of the abrasive particles to have data jitter, and causing the pressure difference between the dynamic pressures of the abrasive particles at the outlet end and the inlet end of the inner gear workpiece to also have data jitter. Therefore, in order to reduce the influence of the data jitter of the dynamic pressure of the abrasive particles in the polishing equipment on the subsequent evaluation of the change of the roughness of the tooth groove wall surface of the inner gear workpiece, the trend item of the pressure difference time sequence of any adjustment time is obtained, which is used to evaluate the actual change trend of the pressure difference between the dynamic pressures of the abrasive particles at the outlet end and the inlet end of the inner gear workpiece when the inner gear workpiece is polished in the time period.

[0060] In the embodiment, the STL (Seasonal and Trend decomposition using Loess) algorithm is used to obtain the trend item of the pressure difference time sequence, wherein the STL algorithm is a known technology and will not be described herein. As other embodiments, as long as the trend item of the pressure difference time sequence can be obtained, other existing feasible technologies can be used, which are not specially limited in the present application.

[0061] Further, the mean value of all data in the trend item is taken as the change flattening factor of the any adjustment time, which is used to evaluate the overall roughness of the tooth groove wall of the any internal gear workpiece after the cutting action of abrasive particles before the any adjustment time, and the smaller the calculated change flattening factor is, the lower the overall roughness of the tooth groove wall after the cutting action of abrasive particles before the any adjustment time is. Figure 2

[0062] Further, in the process of polishing the internal gear workpiece using the polishing equipment, the degree of fluctuation of the dynamic pressure data of the abrasive particles in the polishing equipment due to the uneven disturbance of the rough wall of the tooth groove will also gradually decrease as the roughness of the tooth groove wall of the internal gear workpiece decreases, so that the degree of data fluctuation of the pressure difference between the abrasive particles at the outlet and inlet ends of the internal gear workpiece will also gradually decrease as the roughness of the tooth groove wall of the internal gear workpiece decreases. Therefore, in order to more accurately evaluate the overall roughness of the tooth groove wall of the any internal gear workpiece after the cutting action of abrasive particles during the polishing process, and to more reasonably adjust the extrusion pressure of the abrasive particles in the subsequent polishing equipment, the following processing is performed.

[0063] First, the difference amount of the elements at the same position between the pressure difference time series and the trend item of the any adjustment time is calculated, which is used to evaluate the data fluctuation degree of the pressure difference between the abrasive particles at the outlet and inlet ends of the any internal gear workpiece at the sampling time corresponding to each element, and the mean value of the difference amount of the elements at the same position between the pressure difference time series and the trend item of the any adjustment time is taken as the fluctuation flattening factor of the any adjustment time, which is used to evaluate the overall roughness of the any internal gear workpiece before the any adjustment time, and the smaller the calculated fluctuation flattening factor is, the lower the overall roughness of the tooth groove wall after the cutting action of abrasive particles before the any adjustment time is.

[0064] In this embodiment, the difference amount of the elements at the same position between the pressure difference time series and the trend item is the absolute value of the difference.

[0065] After that, the mean value of the change flattening factor and the fluctuation flattening factor of the any adjustment time is taken as the flattening coefficient of the any adjustment time, which is used to adjust the extrusion pressure of the abrasive particles in the polishing equipment used by the any internal gear workpiece, and the smaller the calculated flattening coefficient is, the smaller the value of the extrusion pressure of the abrasive particles in the polishing equipment in the subsequent data processing process should be, so as to avoid over-polishing of the any gear during the subsequent polishing process.

[0066] ​Step 3, by the gentle coefficient, in combination with the preset maximum value and the preset minimum value of the extrusion pressure of the abrasive particles in the polishing equipment, an extrusion pressure adjustment value of each adjustment time is obtained, which is used to adjust the extrusion pressure of the abrasive particles in the polishing equipment within the time interval between each adjustment time and the next adjacent adjustment time.

[0067] Further, by the gentle coefficient of any adjustment time, in combination with the preset maximum value and the preset minimum value of the extrusion pressure of the abrasive particles in the polishing equipment, the extrusion pressure adjustment value of the any adjustment time is obtained, and the expression is:

[0068] In the formula, represents the extrusion pressure adjustment value of the Tth adjustment time; 、 respectively represent the preset maximum value and the preset minimum value of the extrusion pressure of the abrasive particles in the polishing equipment used when the planetary reducer internal gear is polished, and the preset maximum value and the preset minimum value can be obtained by CFD simulation test; represents the gentle coefficient of the Tth adjustment time; represents the rounding function. Let be the parameter adjustment factor. The flowchart of the acquisition process of the extrusion pressure adjustment value is shown in Figure 3 .

[0069] In this embodiment, the preset maximum value and the preset minimum value are 5 MPa and 2 MPa respectively.

[0070] In this embodiment, when the rounding function is used to process , one decimal place is retained. The implementer can determine the number of decimal places to be retained according to the actual situation, and the present application does not make special limitations.

[0071] Further, the extrusion pressure adjustment value of the any adjustment time is used as the value of the extrusion pressure of the abrasive particles in the polishing equipment used by the any internal gear workpiece within the time interval between the any adjustment time and the next adjacent adjustment time.

[0072] In summary, the application obtains the change gentle factor through the change of the difference degree between the pressure data, can indirectly reflect the roughness degree of the tooth groove wall surface according to the influence of the roughness degree of the tooth groove wall surface of the internal gear workpiece on the change of the pressure difference, can effectively evaluate the roughness degree change of the tooth groove wall surface of the internal gear workpiece in the polishing process, and provide a reference basis for subsequent adjustment of the extrusion pressure of the abrasive particles in the polishing equipment; further, considering that the change of the roughness degree of the tooth groove wall surface of the internal gear workpiece will affect the data jitter degree of the pressure difference, the roughness degree of the tooth groove wall surface of the internal gear workpiece is evaluated through the data jitter degree of the pressure difference, and the gentle coefficient is obtained by combining the change gentle factor, so that the roughness degree of the tooth groove wall surface of the internal gear workpiece after being subjected to the cutting action of the abrasive particles in the polishing equipment is more comprehensively evaluated, the accuracy of the roughness degree evaluation of the tooth groove wall surface of the internal gear workpiece is improved, and a more reliable basis is provided for subsequent adjustment of the extrusion pressure of the abrasive particles in the polishing equipment;

[0073] Further, the extrusion pressure adjustment value obtained by using the gentle coefficient is used to adjust the value of the extrusion pressure of the abrasive particles in the polishing equipment used for the internal gear workpiece in the subsequent polishing process, so that the extrusion pressure of the abrasive particles in the polishing equipment can be accurately controlled, the change of the extrusion pressure of the abrasive particles in the polishing equipment matches the change of the roughness degree of the tooth groove surface of the internal gear workpiece, and the over-polishing or under-polishing caused by the excessive or insufficient extrusion pressure of the abrasive particles in the polishing equipment during the subsequent polishing processing of the internal gear workpiece is effectively avoided, thereby ensuring the final polishing processing quality of the internal gear workpiece.

[0074] The flowcharts and block diagrams in the drawings show the possible implementation architecture, functions and operations of the system, method and computer program product according to the embodiments of the present disclosure. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment or a part of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions annotated in the blocks can also occur in an order different from that annotated in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. In the description corresponding to the flowcharts and block diagrams in the drawings, the operations or steps corresponding to different blocks can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0075] It is apparent to a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the essential characteristics of the present application. Therefore, the above-described embodiments of the present application should be considered in all respects as illustrative and not restrictive.

Claims

1. A method for polishing workpieces of internal gears in a planetary reducer, characterized in that, The method includes the following steps: During the polishing process of any internal gear workpiece using polishing equipment, the pressure data of the abrasive particles at the inlet and outlet ends of any internal gear workpiece are collected in real time. The adjustment time of the extrusion pressure of the abrasive grains in the preset polishing equipment is determined. For each adjustment time and the time period between each adjustment time and the adjacent previous adjustment time, the change smoothing factor of each adjustment time is obtained by the change of the difference between the pressure data at the outlet end and the inlet end during the time period. Combined with the jitter smoothing factor of each adjustment time obtained by the data jitter of the difference, the smoothing coefficient of each adjustment time is obtained. By using the smoothing coefficient and combining the preset maximum and minimum values ​​of the extrusion pressure of the abrasive grains in the polishing equipment, the extrusion pressure adjustment value at each adjustment moment is obtained, which is used to adjust the extrusion pressure of the abrasive grains in the polishing equipment within the time interval between each adjustment moment and its adjacent next adjustment moment. The expression for the extrusion pressure adjustment value is: In the formula, This represents the compression pressure adjustment value at the Tth adjustment time. , These represent the preset maximum and minimum values ​​of the abrasive extrusion pressure in the polishing equipment used for polishing the internal gears of any production batch of planetary reducers. This represents the smoothness coefficient at the T-th adjustment time. This represents the rounding function.

2. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 1, characterized in that, The process for obtaining the gradual change factor is as follows: Calculate the difference in pressure data between the outlet and inlet at each sampling time, and obtain the trend of the difference in time series at all sampling times within the time period. By analyzing the data distribution in the trend term, the change smoothness factor at each adjustment time is obtained.

3. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 2, characterized in that, The change smoothing factor is the mean of all data in the trend item.

4. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 2, characterized in that, The process of obtaining the jitter smoothing factor is as follows: Calculate the difference between the difference value at each sampling time and its corresponding data in the trend term; The jitter smoothing factor is obtained by the distribution of the difference at all sampling times within the time period.

5. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 4, characterized in that, The jitter smoothing factor is the mean of the difference at all sampling times within the time period.

6. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 1, characterized in that, The smoothing coefficient is the average of the change smoothing factor and the jitter smoothing factor.

7. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 1, characterized in that, The process for obtaining the extrusion pressure adjustment value is as follows: Calculate the difference between the preset maximum value and the preset minimum value; By combining the difference with the smoothing coefficient, the parameter adjustment factor at each adjustment time is obtained; The extrusion pressure adjustment value is positively correlated with the parameter adjustment factor and the preset minimum value.

8. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 7, characterized in that, The parameter adjustment factor is the result of rounding the product of the difference and the smoothing coefficient.

9. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 7, characterized in that, The extrusion pressure adjustment value is the sum of the parameter adjustment factor and the preset minimum value.

10. The workpiece polishing method for the internal gear of a planetary reducer as described in claim 1, characterized in that, The adjustment of the extrusion pressure of the abrasive grains in the polishing equipment within the time interval between each adjustment time and its adjacent subsequent adjustment time includes: The extrusion pressure adjustment value at each adjustment moment is taken as the value of the extrusion pressure of the abrasive grains in the polishing equipment used for any internal gear workpiece within the time interval between each adjustment moment and the next adjacent adjustment moment.

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