Workpiece polishing method for internal gear of planetary reducer

Abstract

The invention relates to the technical field of internal gear polishing, in particular to a planetary reducer internal gear workpiece polishing machining method which comprises the steps that in the process that any internal gear workpiece is polished through polishing equipment, pressure data of abrasive particles at the inlet end and the outlet end of any internal gear workpiece are collected in real time; the method comprises the following steps: presetting each adjustment moment of extrusion pressure of abrasive particles in polishing equipment, and for a time period between each adjustment moment and an adjacent previous adjustment moment, acquiring a gentle coefficient of each adjustment moment by combining a change condition of a difference degree of pressure data between an outlet end and an inlet end in the time period and a data jitter degree; and the extrusion pressure adjustment value at each adjustment moment is obtained, and the extrusion pressure of abrasive particles in the polishing equipment is adjusted. According to the internal gear polishing equipment, the extrusion pressure of abrasive particles in the polishing equipment is accurately controlled, the over-polishing or under-polishing condition is avoided, and then the final polishing machining quality of an internal gear workpiece is ensured.

Description

Technical Field

[0001] This application relates to the field of internal gear polishing technology, specifically to a workpiece polishing method for internal gears of a planetary reducer. Background Technology

[0002] Planetary gear reducers are precision reducers composed of planetary gears, sun gears, and internal gears. They are often used in servo motors to reduce speed and increase torque. As one of the core components of a planetary gear reducer, the machining accuracy of the internal gear affects the overall performance of the reducer. Polishing is an important step in the internal gear machining process, which can effectively reduce burrs on the surface of the internal gear workpiece and reduce its roughness, thereby improving the appearance quality of the finished internal gear.

[0003] Abrasive flow polishing is a commonly used method for polishing internal gears. It has advantages such as being unrestricted by workpiece structure and material, high processing efficiency, and low cost. However, when performing batch polishing of internal gears of a certain specification, abrasive flow polishing technology usually involves simulation of the gears of that specification, such as CFD (Computational Fluid Dynamics) simulation, to obtain polishing parameters, such as the extrusion pressure of the abrasive particles. Uniform polishing parameters are then used to polish different internal gears of the same specification. However, due to the differences in the blank geometry of different internal gears and the different actual processing errors in each internal gear processing step before polishing, the processing method using uniform polishing parameters is difficult to adapt to the actual polishing process of internal gears. This leads to over-polishing or under-polishing of the internal gears, thus affecting the polishing quality of the internal gears. Summary of the Invention

[0004] In view of the above, it is necessary to provide a polishing method for internal gears of planetary reducers. Compared with the traditional polishing method for internal gears of planetary reducers, this method avoids over-polishing or under-polishing by precisely controlling the extrusion pressure of abrasive grains in the polishing equipment, thereby ensuring the final polishing quality of the internal gear workpiece.

[0005] The polishing method for the internal gear of a planetary reducer disclosed in this application adopts the following technical solution: One embodiment of this application provides a workpiece polishing method for the internal gear of a planetary reducer, the method comprising 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.

[0006] In one embodiment, the process of obtaining the change smoothing 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.

[0007] In one embodiment, the change smoothing factor is the mean of all data in the trend term.

[0008] In one embodiment, 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.

[0009] In one embodiment, the jitter smoothing factor is the mean of the difference at all sampling times within the time period.

[0010] In one embodiment, the smoothing coefficient is the average of the change smoothing factor and the jitter smoothing factor.

[0011] In one embodiment, the process of 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.

[0012] In one embodiment, the parameter adjustment factor is the result of rounding the product of the difference and the smoothing coefficient.

[0013] In one embodiment, the extrusion pressure adjustment value is the sum of the parameter adjustment factor and the preset minimum value.

[0014] In one embodiment, adjusting 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.

[0015] This application has at least the following beneficial effects: This application obtains a smoothing factor by analyzing the variation in the degree of difference between pressure data. It indirectly reflects the roughness of the tooth groove wall of the internal gear workpiece based on the influence of the roughness of the pressure difference on the pressure difference, effectively assessing the roughness change of the tooth groove wall during the polishing process. This provides a reference for subsequent adjustment of the extrusion pressure of the abrasive grains in the polishing equipment. Furthermore, considering that the change in the roughness of the tooth groove wall of the internal gear workpiece affects the data fluctuation of the pressure difference, the roughness of the tooth groove wall of the internal gear workpiece is assessed by the data fluctuation of the pressure difference. Combined with the smoothing factor, a smoothing coefficient is obtained, providing a more comprehensive assessment of the roughness of the tooth groove wall of the internal gear workpiece after being subjected to the cutting action of the abrasive grains in the polishing equipment. This improves the accuracy of the roughness assessment of the tooth groove wall of the internal gear workpiece, thus providing a more reliable basis for subsequent adjustment of the extrusion pressure of the abrasive grains in the polishing equipment. Furthermore, by using the extrusion pressure adjustment value obtained from the smoothing coefficient, the extrusion pressure of the abrasive grains in the polishing equipment used for the internal gear workpiece can be adjusted during the subsequent polishing process. This allows for precise control of the extrusion pressure of the abrasive grains in the polishing equipment, ensuring that the change in the extrusion pressure of the abrasive grains matches the change in the roughness of the tooth groove surface of the internal gear workpiece. This effectively avoids over-polishing or under-polishing caused by excessive or insufficient extrusion pressure of the abrasive grains in the polishing equipment during subsequent polishing of the internal gear workpiece, thereby ensuring the final polishing quality of the internal gear workpiece. Attached Figure Description

[0016] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating the steps of a workpiece polishing method for an internal gear of a planetary reducer provided in this application; Figure 2 A schematic diagram illustrating the process of obtaining the gradual change factor; Figure 3 This is a schematic diagram illustrating the process of obtaining the extrusion pressure adjustment value. Detailed Implementation

[0018] In the description of the embodiments in this application, the words "exemplary," "or," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary," "or," and "for example" is intended to present the relevant concepts in a specific manner.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. It should be understood that, unless otherwise stated, " / " in this application means "or".

[0020] It should also be noted that the terms "first" and "second" in this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0021] The following description, in conjunction with the accompanying drawings, details a specific scheme for a workpiece polishing method for the internal gear of a planetary reducer provided in this application.

[0022] This application provides a method for polishing a workpiece of an internal gear in a planetary gear reducer, specifically, the following method for polishing a workpiece of an internal gear in a planetary gear reducer is provided. Please refer to [link to relevant documentation]. Figure 1 The method includes the following steps: Step 1: 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.

[0023] In this embodiment, the machining process of the internal gear of the planetary reducer is as follows: (1) Blank preparation: The blank used to manufacture the internal gear of the planetary reducer is heat treated to enhance the hardness of the blank and eliminate its internal stress. (2) Rough turning: The blank obtained in step (1) is rough turned using a CNC machine tool to remove most of the excess material in the blank, and the blank is transformed into a preliminary internal gear shape to obtain an internal gear blank of the required size. (3) Quenching treatment: The internal gear blank obtained in step (2) is quenched to improve the strength and toughness of the internal gear blank; (4) Broaching finishing: Use broaching equipment to finish the internal gear blank to produce the tooth shape of the internal gear and ensure that it meets the requirements; (5) Gas carburizing treatment: The internal gear workpiece obtained after broaching in step (4) is subjected to gas carburizing treatment to improve the wear resistance and strength of the internal gear workpiece. (6) Polishing: The surface of the internal gear workpiece obtained after gas carburizing in step (5) is polished using polishing equipment to remove burrs and reduce the surface roughness of the internal gear workpiece, thereby improving the appearance quality of the finished internal gear. The polishing equipment is an abrasive flow polishing machine.

[0024] To avoid over-polishing or under-polishing during the polishing process of internal gears, the extrusion pressure of the abrasive grains in the polishing equipment during the abrasive flow polishing process of the internal gear workpiece is dynamically adjusted. This ensures that the extrusion pressure of the abrasive grains in the polishing equipment changes with the surface roughness of the tooth groove of the internal gear workpiece during the actual polishing process, thereby improving the final polishing quality of the internal gear workpiece.

[0025] Taking any internal gear workpiece in any production batch of planetary reducer internal gears as an example, pressure sensors installed at the inlet and outlet ends of the sleeve of the workpiece fixture of the polishing equipment are used to collect the pressure data of the abrasive particles at the inlet and outlet ends of the internal gear workpiece in real time during the polishing process of the polishing equipment. This data is used to monitor the dynamic pressure changes of the abrasive particles at the inlet and outlet ends of the internal gear workpiece during the polishing process of the internal gear.

[0026] In this embodiment, the sampling frequency of the pressure sensor is set to 10Hz. The sampling frequency of the pressure sensor is preset by the user and can be set by the implementer according to the actual situation. This application does not impose any special restrictions.

[0027] Furthermore, the extrusion pressure of the abrasive grains in the pre-set polishing equipment is adjusted at each adjustment time.

[0028] In this embodiment, the time interval between two adjacent adjustment times is set to 10 seconds. The value of the time interval is preset by the user and can be set by the implementer according to the actual situation. This application does not impose any special restrictions. The third second after the polishing equipment is started is taken as the first adjustment time. The extrusion pressure of the abrasive particles in the polishing equipment is not adjusted at the first adjustment time.

[0029] Furthermore, 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 inlet and outlet ends collected within the time period are normalized respectively, so as to reduce the impact of the pressure data collected in different time periods on subsequent data processing due to their different numerical scales.

[0030] In this embodiment, the pressure data of the abrasive particles at the inlet and outlet ends are normalized by calculating the ratio of the pressure data of each abrasive particle at the inlet and outlet ends to the upper limit of the range of the pressure sensor used.

[0031] Step 2: Preset the adjustment time of the extrusion pressure of the abrasive grains in the pre-set polishing equipment. For each adjustment time and the time period between each adjustment time and the adjacent previous adjustment time, obtain the change smoothing factor of each adjustment time by the change of the difference in pressure data between the outlet end and the inlet end within the time period. Combine the jitter smoothing factor of each adjustment time obtained by the data jitter of the difference to obtain the smoothing coefficient of each adjustment time.

[0032] Abrasive flow polishing is a polishing technique that uses semi-solid abrasive media to extrude into a fixture under a certain extrusion pressure to polish the surface of a workpiece. When the extrusion pressure of the abrasive media is low, the cutting action of the abrasive grains on the workpiece surface is weak, which can easily lead to under-polishing of workpiece surfaces with high roughness, resulting in the surface roughness not achieving the desired effect. Conversely, when the extrusion pressure is high, the cutting action of the abrasive grains is strong, which can easily lead to over-polishing of workpiece surfaces with low roughness, resulting in scratches. Therefore, when polishing internal gear workpieces using polishing equipment, the change in the extrusion pressure of the abrasive grains in the polishing equipment should be matched with the change in the roughness of the tooth groove surface of the internal gear workpiece.

[0033] During the polishing process of internal gear workpieces using polishing equipment, when abrasive grains enter the tooth groove of the internal gear workpiece, a large number of abrasive grains will collide with the tooth groove wall. Part of the kinetic energy of the abrasive grains will be converted into cutting energy, which is used to cut and remove excess material from the tooth groove wall. Furthermore, the rough wall of the tooth groove will disturb the flow of abrasive grains, thereby increasing the turbulence during the flow of abrasive grains and increasing the dissipation of abrasive grain kinetic energy. This leads to a decrease in the dynamic pressure of the abrasive grains in the tooth groove of the internal gear workpiece. As the tooth groove wall of the internal gear workpiece usually becomes smoother during the polishing process, the dynamic pressure of the abrasive grains at the exit end of the internal gear workpiece will gradually increase as the roughness of the tooth groove wall of the internal gear workpiece decreases. Consequently, the pressure difference between the dynamic pressure of the abrasive grains at the inlet and outlet ends of the internal gear workpiece will also gradually decrease as the roughness of the tooth groove wall of the internal gear workpiece decreases.

[0034] Based on the above analysis, the difference in pressure data between the outlet and inlet ends at each sampling time is calculated. The difference values ​​at all sampling times within the time period are arranged in chronological order to form a pressure difference time series at any adjustment time. This series is used to evaluate the change in pressure difference between the dynamic pressure of the abrasive particles at the outlet and inlet ends of the internal gear workpiece over time when the workpiece is polished within the time period.

[0035] In this embodiment, the difference between pressure data is the absolute value of the difference.

[0036] Because the roughness of the tooth groove wall surface of an internal gear workpiece is usually inconsistent at different locations before polishing, the abrasive grains in the polishing equipment will be disturbed by the uneven roughness of the tooth groove wall when flowing through it. This causes data fluctuations in the dynamic pressure of the abrasive grains, which in turn causes data fluctuations in the pressure difference between the dynamic pressure of the abrasive grains at the inlet and outlet ends of the internal gear workpiece. Therefore, in order to reduce the impact of the data fluctuations in the dynamic pressure of the abrasive grains in the polishing equipment on the subsequent evaluation of the changes in the roughness of the tooth groove wall surface of any internal gear workpiece during the polishing process, the trend term of the pressure difference time series at any adjustment moment is obtained. This trend term is used to evaluate the actual changing trend of the pressure difference between the dynamic pressure of the abrasive grains at the inlet and outlet ends of the internal gear workpiece during the polishing process within the specified time period.

[0037] In this embodiment, the STL (Seasonal and Trend decomposition using Loess) algorithm is used to obtain the trend term of the pressure difference time series. The STL algorithm is a well-known technology and will not be described in detail in this application. As other implementation methods, based on the ability to obtain the trend term of the pressure difference time series, implementers may use other existing feasible technologies, and this application does not impose any special restrictions.

[0038] Furthermore, the mean of all data in the trend term is used as the change smoothing factor at any adjustment time. This factor is used to evaluate the overall roughness of the tooth groove wall of any internal gear workpiece after being subjected to abrasive cutting action before any adjustment time within the time period. The smaller the calculated change smoothing factor, the lower the overall roughness of the tooth groove wall after being subjected to abrasive cutting action before any adjustment time. A schematic diagram of the change smoothing factor acquisition process is shown below. Figure 2 As shown.

[0039] Furthermore, during the polishing process of an internal gear workpiece using a polishing equipment, the dynamic pressure data fluctuation caused by the uneven disturbance of the rough tooth groove surface when the abrasive grains in the polishing equipment flow through the tooth groove of the internal gear workpiece will gradually decrease as the roughness of the tooth groove surface decreases. Consequently, the data fluctuation caused by the pressure difference between the dynamic pressure of the abrasive grains at the inlet and outlet ends of the internal gear workpiece will also gradually decrease as the roughness of the tooth groove surface decreases. Therefore, to more accurately assess the overall roughness of the tooth groove surface of any internal gear workpiece after being cut by the abrasive grains during polishing, and to more rationally adjust the extrusion pressure of the abrasive grains in the subsequent polishing equipment, the following treatment is performed.

[0040] First, the difference between the pressure difference time series and its trend term at any adjustment time is calculated for each element at the same position. This is used to evaluate the data jitter of the pressure difference between the dynamic pressure of the abrasive grains at the inlet and outlet ends of any internal gear workpiece at the sampling time corresponding to each element. The mean of the difference between the pressure difference time series and its trend term at any adjustment time is used as the jitter smoothing factor for any adjustment time. This factor is used to evaluate the overall roughness of any internal gear workpiece after being cut by the abrasive grains before any adjustment time within the time period. The smaller the calculated jitter smoothing factor, the lower the overall roughness of the tooth groove wall after being cut by the abrasive grains before any adjustment time.

[0041] In this embodiment, the difference between the elements at the same position in the pressure difference time series and its trend term is the absolute value of the difference.

[0042] Then, the average of the change smoothing factor and the jitter smoothing factor at any adjustment time is used as the smoothing coefficient at any adjustment time. This coefficient is used to adjust the extrusion pressure of the abrasive grains in the polishing equipment used for any internal gear workpiece. The smaller the calculated smoothing coefficient, the smaller the extrusion pressure of the abrasive grains in the polishing equipment should be in the subsequent data processing process, so as to avoid over-polishing of any gear in its subsequent polishing process.

[0043] Step 3: Using the smoothing coefficient, combined with the preset maximum and minimum values ​​of the extrusion pressure of the abrasive grains in the polishing equipment, obtain the extrusion pressure adjustment value at each adjustment time, which is used to adjust the extrusion pressure of the abrasive grains in the polishing equipment within the time interval between each adjustment time and its adjacent next adjustment time.

[0044] Furthermore, by combining the smoothness coefficient at any given adjustment moment with the preset maximum and minimum values ​​of the extrusion pressure of the abrasive grains in the polishing equipment, the adjustment value of the extrusion pressure at any given adjustment moment is obtained, expressed as: 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 during the polishing process of the internal gears of the planetary reducer in any production batch. The preset maximum and minimum values ​​can be obtained through CFD simulation experiments. This represents the smoothness coefficient at the T-th adjustment time. This represents the rounding function. This is denoted as the parameter adjustment factor. A schematic diagram illustrating the process for obtaining the extrusion pressure adjustment value is shown below. Figure 3 As shown.

[0045] In this embodiment, the preset maximum value and preset minimum value are 5MPa and 2MPa, respectively.

[0046] In this embodiment, the rounding function is used to... When processing, one decimal place is retained. Implementers can determine the number of decimal places to retain according to the actual situation. This application does not impose any special restrictions.

[0047] Furthermore, the extrusion pressure adjustment value at any given 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 the given adjustment moment and the next adjacent adjustment moment.

[0048] In summary, this application obtains a smoothing factor by analyzing the variation in the degree of difference between pressure data. This allows for an indirect reflection of the roughness of the tooth groove wall on the pressure difference, effectively assessing the change in roughness during polishing and providing a reference for adjusting the extrusion pressure of the abrasive particles in the polishing equipment. Furthermore, considering that the change in the roughness of the tooth groove wall affects the fluctuation of the pressure difference data, this application assesses the roughness of the tooth groove wall by analyzing the fluctuation of the pressure difference data and, combined with the smoothing factor, obtains a smoothing coefficient. This provides a more comprehensive assessment of the roughness of the tooth groove wall after being cut by the abrasive particles in the polishing equipment, improving the accuracy of the roughness assessment and providing a more reliable basis for adjusting the extrusion pressure of the abrasive particles in the polishing equipment. Furthermore, by using the extrusion pressure adjustment value obtained from the smoothing coefficient, the extrusion pressure of the abrasive grains in the polishing equipment used for the internal gear workpiece can be adjusted during the subsequent polishing process. This allows for precise control of the extrusion pressure of the abrasive grains in the polishing equipment, ensuring that the change in the extrusion pressure of the abrasive grains matches the change in the roughness of the tooth groove surface of the internal gear workpiece. This effectively avoids over-polishing or under-polishing caused by excessive or insufficient extrusion pressure of the abrasive grains in the polishing equipment during subsequent polishing of the internal gear workpiece, thereby ensuring the final polishing quality of the internal gear workpiece.

[0049] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0050] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from its essential characteristics. Therefore, the embodiments described above should be considered exemplary and non-limiting in all respects.

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.

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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