A crosshead bushing inlaying method, system, apparatus, and media

Abstract

The application discloses a crosshead bushing inlay processing method, system, equipment and medium, and belongs to the field of processing technology.The method comprises the following steps: acquiring the design size and the interference range of the crosshead and the bushing; determining the bushing shrinkage under the condition of liquid nitrogen cooling based on a cooperative calculation rule formed by a preset shrinkage standard calculation mode and a machine learning calculation mode; determining the outer diameter processing size range and the inner diameter processing size range of the bushing according to the bushing shrinkage and the interference range; generating a processing control instruction based on the outer diameter processing size range and the inner diameter processing size range of the bushing, and sending the processing control instruction to a processing unit; the processing unit performs grinding processing on the bushing in response to the processing control instruction; and after the grinding processing, an assembly instruction is generated and sent to an assembly unit.The application has the advantages of reducing cost, enhancing adaptability and improving processing precision.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of processing, and particularly relates to a crosshead bushing embedding processing method, system, device and medium. BACKGROUND

[0002] As core power equipment in the fields of petrochemical industry, oil and gas exploitation, etc., the crosshead bushing is a key vulnerable component in the transmission mechanism of the piston compressor, directly affecting the operation stability and service life of the compressor. The crosshead bushing needs to be precisely matched with the crosshead body and the crosshead pin, and the embedding processing quality of the crosshead bushing directly determines the assembly accuracy and smoothness of the three, which is one of the core links of the compressor manufacturing and maintenance.

[0003] At present, the mainstream crosshead bushing embedding processing in the industry adopts a "three-step method" process, and the specific process is as follows: first, the outer cylindrical surface of the crosshead bushing is precisely processed or ground to meet the interference fit size requirement with the crosshead hole; then, the bushing is fixed and assembled into the crosshead hole through cold assembly or press assembly; finally, the inner cylindrical surface of the bushing needs to be precisely processed or ground again to ensure that it forms a gap fit with the crosshead pin in accordance with the design standard.

[0004] However, the traditional process has many outstanding problems in actual application:

[0005] Firstly, the cost loss is significant. Since the crosshead body needs to be clamped and processed twice, and some compressor plants lack high-precision processing equipment, the crosshead body needs to be returned to the factory or outsourced for processing, which generates high logistics costs, spare parts storage costs and outsourcing processing fees, especially for large compressors (such as 1600KW oil field booster compressors), the processing cycle in the factory is as long as several weeks, which seriously affects the equipment operation efficiency;

[0006] Secondly, the processing precision is difficult to guarantee. Positioning deviation is easy to occur in the two clamping processes, and the system error of the processing equipment is added, which leads to poor consistency of the fit clearance between the bushing inner hole and the crosshead pin. It is necessary to rely on workers with high grinding technology to perform on-site manual grinding to meet the requirement of more than 85% of the fitting area. This not only further increases the labor cost, but also is affected by the difference in the skill level of workers, making it difficult to stably control the processing quality;

[0007] Thirdly, the process adaptability is insufficient. When facing new materials (such as high-strength alloy, wear-resistant copper alloy), non-standard size customization or special working conditions such as high temperature and high pressure, the traditional three-step method cannot dynamically adjust the parameters, which is easy to cause problems such as tight fit, looseness or early wear, and is difficult to meet the diversified application requirements. SUMMARY

[0008] The application aims to provide a crosshead bushing inlay processing method, system, device and medium to solve the problems of high cost, low processing precision and insufficient adaptability in the prior art.

[0009] To achieve the above-mentioned purpose, the application adopts the following technical solutions:

[0010] In a first aspect, the application provides a crosshead bushing inlay processing method, which comprises:

[0011] Obtaining the design size and interference range of the crosshead and the bushing;

[0012] Determining the bushing shrinkage under the condition of liquid nitrogen cooling based on a cooperative calculation rule composed of a preset shrinkage standard calculation mode and a machine learning calculation mode;

[0013] Determining the outer diameter processing size range and the inner diameter processing size range of the bushing according to the bushing shrinkage and the interference range;

[0014] Generating a processing control instruction based on the outer diameter processing size range and the inner diameter processing size range of the bushing, sending the processing control instruction to a processing unit, and grinding the bushing when the processing unit responds to the processing control instruction;

[0015] After the grinding processing, generating an assembly instruction, sending the assembly instruction to an assembly unit, and cooling the bushing under the condition of liquid nitrogen cooling and assembling the cooled bushing into the crosshead when the assembly unit responds to the assembly instruction.

[0016] Preferably, the cooperative calculation rule is:

[0017] Calling the shrinkage standard calculation mode to determine the shrinkage standard value;

[0018] Obtaining the material and processing condition of the crosshead and the bushing, determining the processing scene of the bushing through a preset rule, and the processing scene is a standard scene, a transition scene or a complex scene;

[0019] When the processing scene is the standard scene, the shrinkage standard value is directly used as the bushing shrinkage;

[0020] When the processing scene is the transition scene, the machine learning calculation mode is called to predict the correction coefficient of the shrinkage; the shrinkage standard value is corrected according to the correction coefficient of the shrinkage to obtain the corrected shrinkage, and the corrected shrinkage is used as the bushing shrinkage;

[0021] When the processing scene is the complex scene, the machine learning calculation mode is called to predict the predicted value of the shrinkage; the predicted value of the shrinkage and the shrinkage standard value are weighted and fused based on a preset weighting coefficient to obtain the fused shrinkage, and the fused shrinkage is used as the bushing shrinkage.

[0022] Preferably, the shrinkage amount standard calculation mode is:

[0023] Obtaining the elastic modulus, Poisson's ratio, nominal outer diameter and nominal inner diameter of the crosshead, and the elastic modulus, Poisson's ratio, nominal outer diameter and nominal inner diameter of the bushing;

[0024] Determining a first coefficient according to the Poisson's ratio, nominal outer diameter and nominal inner diameter of the bushing;

[0025] Determining a second coefficient according to the Poisson's ratio, nominal outer diameter and nominal inner diameter of the crosshead;

[0026] Selecting an initial value from the interference amount range as a selected value, and determining the interference pressure according to the selected value, the second coefficient, the first coefficient, the elastic modulus of the crosshead and the elastic modulus and nominal outer diameter of the bushing;

[0027] Determining the shrinkage amount standard value according to the interference pressure and the elastic modulus, nominal outer diameter and nominal inner diameter of the bushing.

[0028] Preferably, the initial value is the middle value or the maximum value in the interference amount range.

[0029] Preferably, the method further comprises:

[0030] Recording the actual machining data under the standard scene and determining the machining deviation;

[0031] Recording the change trend of the machining deviation, determining a correction coefficient of the selected value according to the change trend of the machining deviation, correcting the selected value to obtain a corrected selected value, and the corrected selected value is located in the interference amount range.

[0032] Preferably, when the machining scene is a transition scene, the machine learning calculation mode adopts a gradient boosting tree correction model; and when the machining scene is a complex scene, the machine learning calculation mode adopts a neural network adaptation model.

[0033] Preferably, the machining condition includes machining temperature and machining pressure, and the preset rule is:

[0034] Constructing a reference standard of the machining temperature, machining pressure and the material and design size of the bushing and the crosshead;

[0035] When the machining temperature, machining pressure and the material and design size of the bushing and the crosshead all meet the reference standard, the machining scene is a standard scene;

[0036] When any one of the machining temperature, machining pressure and the material and design size of the bushing and the crosshead deviates from the reference standard, the machining scene is a transition scene;

[0037] When two or more of the processing temperature, the processing pressure, and the material and the design size of the bushing and the crosshead deviate from the reference standard, and the processing scene is a complex scene.

[0038] In a second aspect, the present application provides a crosshead bushing insert processing system for implementing the crosshead bushing insert processing method described above, the system comprising:

[0039] A data acquisition module for acquiring the design size and the interference range of the crosshead and the bushing;

[0040] A first calculation module for determining the bushing shrinkage under the liquid nitrogen cooling condition based on a cooperative calculation rule composed of a preset shrinkage standard calculation mode and a machine learning calculation mode;

[0041] A second calculation module for determining the outer diameter processing size range and the inner diameter processing size range of the bushing according to the bushing shrinkage and the interference range;

[0042] A first instruction generation module for generating a processing control instruction based on the outer diameter processing size range and the inner diameter processing size range of the bushing, and sending the processing control instruction to a processing unit, wherein the processing unit performs grinding processing on the bushing in response to the processing control instruction;

[0043] A second instruction generation module for generating an assembly instruction after the grinding processing, and sending the assembly instruction to an assembly unit, wherein the assembly unit performs cooling on the bushing under the liquid nitrogen cooling condition and assembles the cooled bushing into the crosshead in response to the assembly instruction.

[0044] In a third aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the crosshead bushing insert processing method described above when executing the computer program.

[0045] In a fourth aspect, the present application provides a computer readable storage medium having a computer program stored thereon, wherein the program is executed by a processor to implement the crosshead bushing insert processing method described above.

[0046] The beneficial effects of the present application are:

[0047] 1、The present application can accurately calculate the bushing shrinkage under the condition of liquid nitrogen cooling through the synergistic calculation rule, and then determine the outer diameter machining size range and the inner diameter machining size range of the bushing according to the bushing shrinkage, so that the machining unit can finish machining the inner and outer cylindrical surface of the bushing at one time according to the outer diameter machining size range and the inner diameter machining size range, and then cool the bushing under the condition of liquid nitrogen cooling and assemble the cooled bushing into the cross head, so that the bushing can form a stable interference fit with the cross head after recovering to normal temperature; therefore, the present application can adopt the two-step process of "one-time finish machining of the inner and outer cylindrical surface of the bushing + liquid nitrogen cooling" based on the calculated outer diameter machining size range and inner diameter machining size range, which can save the cumbersome steps of secondary clamping, returning to the factory or outsourcing processing, shorten the processing cycle by more than 50%, especially for large compressors (such as 1600KW oil field booster equipment), which can avoid long-distance transportation of the cross head body, reduce logistics cost, and avoid the waste of equipment and labor input caused by secondary processing, and further compress the processing cost.

[0048] 2、The synergistic calculation rule composed of the preset shrinkage standard calculation mode and the machine learning calculation mode has strong adaptability, can flexibly adapt to new materials, non-standard size customization and special working conditions such as high temperature and high pressure, breaks through the application limitation of traditional process, and expands the technical application range. DETAILED DESCRIPTION

[0049] The accompanying drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used to explain the embodiments of the present application together with the following specific embodiments, but do not constitute a limitation to the embodiments of the present application. In the drawings:

[0050] Figure 1 is a flow chart of the cross head bushing inlay machining method provided by an embodiment of the present application;

[0051] Figure 2 is a block diagram of the cross head bushing inlay machining system provided by an embodiment of the present application;

[0052] Figure 3 is a schematic diagram of parameters in a standard scenario provided by an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the present application will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the drawings only constitutes some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application.

[0054] Embodiment one

[0055] Figure 1 is a flowchart of a crosshead bushing inlay processing method provided by an embodiment of the present application. The application scenarios of the processing method of the present embodiment include a server, a controller, a processing unit and an assembly unit. The controller is in communication connection with the server, and the processing unit and the assembly unit are both in electrical connection with the controller. The processing unit is used for finish machining and grinding machining of the bushing by a machine tool, and the assembly unit is used for assembling the bushing into the hole of the crosshead in a super-low-temperature liquid nitrogen environment. The processing unit and the assembly unit are conventional devices in the field, and their specific structures are not described one by one in the present embodiment. The crosshead bushing inlay processing method of the present embodiment runs on the controller, as shown in Figure 1 , and the method comprises steps S10-S50.

[0056] Step S10: Obtain the design size and interference range of the crosshead and the bushing.

[0057] In the present embodiment, a design database is pre-constructed on the server. According to the design manual of the piston compressor, the design size and interference range of the crosshead and the bushing are recorded and stored in the design database. In addition, the design database also stores data such as the elastic modulus, Poisson's ratio, nominal outer diameter and nominal inner diameter of the crosshead and the bushing. When these data are needed, the design size such as the inner diameter and the outer diameter of the bushing can be obtained by on-site input, and the interference range can be obtained by sending a query request to the server.

[0058] Step S20: Determine the bushing shrinkage under the condition of liquid nitrogen cooling based on the collaborative calculation rule constituted by the preset shrinkage standard calculation mode and the machine learning calculation mode.

[0059] In the present embodiment, the collaborative calculation rule is:

[0060] Step A1: Call the shrinkage standard calculation mode to determine the shrinkage standard value. The shrinkage standard calculation mode of the present embodiment is:

[0061] First, the elastic modulus, Poisson's ratio, nominal outer diameter and nominal inner diameter of the cross head and the elastic modulus, Poisson's ratio, nominal outer diameter and nominal inner diameter of the bushing are obtained; the second coefficient is determined according to the Poisson's ratio, nominal outer diameter and nominal inner diameter of the cross head, and the first coefficient is determined according to the Poisson's ratio, nominal outer diameter and nominal inner diameter of the bushing.

[0062] The calculation expression of the first coefficient is:

[0063] (1);

[0064] In formula (1), C1 is the first coefficient, d1 is the nominal outer diameter of the bushing, d2 is the nominal inner diameter of the bushing, and v1 is the Poisson's ratio of the bushing.

[0065] The calculation expression of the second coefficient is:

[0066] (2);

[0067] In formula (2), C2 is the second coefficient, d3 is the nominal outer diameter of the cross head, d4 is the nominal inner diameter of the cross head, and v2 is the Poisson's ratio of the cross head. The nominal inner diameter d4 of the cross head and the nominal outer diameter d1 of the bushing have the same value.

[0068] Then, an initial value is selected from the interference range as a selected value, and the interference pressure is determined according to the selected value, the second coefficient, the first coefficient, the elastic modulus of the cross head and the elastic modulus and nominal outer diameter of the bushing.

[0069] Therefore, the calculation expression of the interference pressure of the embodiment is:

[0070] (3);

[0071] In formula (3), P is the interference pressure, E1 is the elastic modulus of the bushing, E2 is the elastic modulus of the cross head, and △D is an initial value selected from the interference range. In the embodiment, the initial value is the middle value or the maximum value in the interference range.

[0072] Finally, the shrinkage standard value is determined according to the interference pressure, the elastic modulus, the nominal outer diameter and the nominal inner diameter of the bushing.

[0073] Therefore, the calculation expression of the shrinkage standard value of the embodiment is:

[0074] (4);

[0075] In formula (4), △S is the shrinkage standard value.

[0076] Step A2: Obtain the material and processing condition of the cross head and the bushing, determine the processing scene of the bushing through the preset rule, and the processing scene is a standard scene, a transition scene or a complex scene.

[0077] The processing condition of the embodiment mainly includes two parameters of processing temperature and processing pressure, and the preset rule of the embodiment is:

[0078] The reference standard of the processing temperature, the processing pressure, and the material and design size of the bushing and the cross head is constructed, for example, the reference standard is that the material of the bushing is ZCuPbSn10 (lead bronze alloy), the material of the cross head is QT600-3 (pearlite type nodular cast iron), the outer diameter of the cross head is 145 mm, the inner hole diameter of the cross head is 98 mm, the outer diameter of the cross head is 98 mm, the inner hole diameter of the cross head is 86 mm, the processing temperature is 10-50℃, and the processing pressure is normal pressure.

[0079] When any one parameter of the processing temperature, the processing pressure, and the material and design size of the bushing and the cross head deviates from the reference standard, the processing scene is a transition scene; when any one parameter of the processing temperature, the processing pressure, and the material and design size of the bushing and the cross head deviates from the reference standard, the processing scene is a transition scene; when two or more parameters of the processing temperature, the processing pressure, and the material and design size of the bushing and the cross head deviate from the reference standard, the processing scene is a complex scene.

[0080] Step A3: When the processing scene is a standard scene, the shrinkage standard value is directly used as the bushing shrinkage.

[0081] Therefore, in the standard scene, the bushing shrinkage can be directly calculated through the shrinkage standard calculation mode, which can reduce the calculation time and ensure the batch processing efficiency. The embodiment takes the parameters in the standard scene as an example, as shown in Figure 3 .

[0082] The parameters in the standard scene in Figure 3 are substituted into formula (1) and formula (2), the first coefficient is calculated as: 7.369275362; the second coefficient is calculated as: 7.369275362; then the interference pressure is calculated as 5.9240767Mpa according to formula (3), and finally the shrinkage standard value is calculated as: 0.066mm according to formula (4); it should be noted that the above calculation results are approximate equal values after retaining a certain number of decimal places.

[0083] As a further optimization of the present embodiment, since the AD in formula (3) is an initial value selected in the interference range, the size of the initial value selected will affect the accuracy of the final shrinkage standard value. In order to improve the calculation accuracy of the shrinkage standard calculation mode, the selected value is dynamically adjusted during processing. Specifically, the actual processing data under the standard scene is recorded, and the processing deviation is determined. The trend of the processing deviation is recorded, and the correction coefficient of the selected value is determined according to the trend of the processing deviation (if the trend of the processing deviation is that the processing deviation is gradually increasing, then the subsequent correction operation is performed), so as to correct the selected value, and obtain the corrected selected value, which is located in the interference range.

[0084] When the dynamic adjustment strategy is adopted in the present embodiment, the initial selected value is preferably the middle value in the interference range. When the corrected selected value is less than the minimum value in the interference range, the minimum value in the interference range is directly adopted. Similarly, when the corrected selected value is greater than the maximum value in the interference range, the maximum value in the interference range is directly adopted. If the processing deviation continues to increase when the maximum value in the interference range or the minimum value in the interference range is selected, an alarm signal is generated to perform fault alarm, so as to perform fault maintenance and troubleshooting on the equipment of the processing unit.

[0085] Step A4: When the processing scene is a transition scene, a machine learning calculation mode is called to predict the correction coefficient of the shrinkage; the shrinkage standard value is corrected according to the correction coefficient of the shrinkage to obtain a corrected shrinkage, which is used as the bushing shrinkage.

[0086] In the present embodiment, when the processing scene is a transition scene, the machine learning calculation mode adopts a gradient boosting tree (GBRT) correction model. The gradient boosting tree (GBRT) of the present embodiment focuses on the error of the previous round of model for optimization by iteratively training weak classifiers (decision trees), can accurately capture the nonlinear relationship between the shrinkage standard value and the single variable deviation (one parameter deviates from the reference standard) (such as the correction rule of the gap fit amount when the temperature increases by 10°C), and the correction result is more consistent with the actual processing error. Moreover, the decision tree structure of the GBRT can clearly present the mapping path of “input variable (such as temperature) → correction coefficient”, and can directly output “due to high temperature: 80°C, correction coefficient: 1.05”, which is consistent with the “traceability” of the shrinkage standard calculation mode, and is convenient for manual audit and process compliance verification. Secondly, the single variable deviation data of the transition scene is easy to collect (such as processing errors at different temperatures), and a high-precision correction model can be trained without massive data, and the training speed is fast, which can quickly adapt to the correction needs of different single variables (temperature, pressure, and small adjustment of material).

[0087] Step A5: when the processing scene is a complex scene, a machine learning calculation mode is called to predict a predicted amount of shrinkage; a preset weighting coefficient is used to weight and fuse the predicted amount of shrinkage and a standard value of the amount of shrinkage, to obtain a fused amount of shrinkage, and the fused amount of shrinkage is taken as the amount of shrinkage of the bushing.

[0088] In this embodiment, when the processing scene is a complex scene, the machine learning calculation mode collects a neural network (ANN) adaptive model; the neural network (ANN) adaptive model of this embodiment has the following advantages:

[0089] In a complex scene, multiple variables such as material, size, and working condition are coupled with each other (for example, the elastic modulus of a new material and the wall thickness of a non-standard size jointly affect the amount of shrinkage), the multi-layer neural network structure of the ANN can automatically learn the complex nonlinear relationship between multiple variables, without the need for manual presetting of coupling rules, so as to realize precise mapping of "multiple inputs → multiple outputs".

[0090] In the face of unknown scenes such as new materials (no historical processing data) and non-standard sizes (no formula for direct calculation), the ANN can learn from data of similar materials and similar size ratios, and migrate and adapt the processing parameters of new scenes; and in a complex scene, some parameters may be missing (for example, some mechanical properties of a new material are not completely detected), the ANN can automatically compensate for the impact of data missing through distributed storage and calculation of network nodes.

[0091] Therefore, the collaborative calculation rule composed of the preset shrinkage standard calculation mode and the machine learning calculation mode in this embodiment has strong adaptability, can flexibly adapt to new materials, non-standard sizes, special working conditions such as high temperature and high pressure, breaks through the application limitations of traditional processes, and expands the technical application range.

[0092] Step S30: according to the amount of shrinkage of the bushing and the range of the amount of interference, the range of the outer diameter processing size of the bushing and the range of the inner diameter processing size of the bushing are determined.

[0093] In this embodiment, the minimum value of the range of the outer diameter processing size of the bushing is:

[0094] d 1min =d1+△D min (5);

[0095] In formula (5), d 1min is the minimum value of the range of the outer diameter processing size of the bushing, and △D min is the minimum value in the range of the amount of interference.

[0096] In this embodiment, the maximum value of the range of the outer diameter processing size of the bushing is:

[0097] d 1max =d1+△Dmax (6);

[0098] In formula (6), d 1max is the maximum value of the outer diameter machining size range of the bushing, and △D max is the maximum value in the interference range.

[0099] In the present embodiment, the minimum value of the inner diameter machining size range of the bushing is:

[0100] d 2min = d2 + △S (7);

[0101] In formula (7), d 2min is the minimum value of the inner diameter machining size range of the bushing.

[0102] In the present embodiment, the maximum value of the inner diameter machining size range of the bushing is:

[0103] d 2max = d2 + k△S (8);

[0104] In formula (8), d 2max is the maximum value of the inner diameter machining size range of the bushing, and k is a proportional coefficient, the value of the proportional coefficient being .

[0105] Step S40: generating a machining control instruction based on the outer diameter machining size range and the inner diameter machining size range of the bushing, and sending the machining control instruction to a machining unit, which grinds the bushing in response to the machining control instruction.

[0106] Step S50: after the grinding, generating an assembly instruction, and sending the assembly instruction to an assembly unit, which cools the bushing under the condition of liquid nitrogen cooling and assembles the cooled bushing into the cross head; thus, the bushing is cooled by using ultra-low-temperature liquid nitrogen (to avoid deformation of the inner hole of the bushing), the shrunk bushing is assembled into the hole of the cross head body, and after the bushing returns to normal temperature, the size of the inner cylindrical surface of the cross head bushing directly reaches the fit clearance of the cross head pin.

[0107] The present embodiment can accurately calculate the bushing shrinkage of the bushing under the condition of liquid nitrogen cooling by using the cooperative calculation rule, and then determine the outer diameter machining size range and the inner diameter machining size range of the bushing according to the bushing shrinkage; then, the machining unit can finish machining the inner and outer cylindrical surfaces of the bushing at one time according to the outer diameter machining size range and the inner diameter machining size range, and then cool the bushing under the condition of liquid nitrogen cooling and assemble the cooled bushing into the cross head; when the bushing returns to normal temperature, the bushing can form a stable interference fit with the cross head.

[0108] And, based on the calculated outer diameter machining size range and inner diameter machining size range, the embodiment can adopt a two-step process of "one-time finishing of the inner and outer cylindrical surfaces of the bushing + liquid nitrogen cold mounting", which saves the cumbersome steps of secondary clamping, returning to the factory or outsourcing processing, shortens the processing cycle by more than 50%, especially for large compressors (such as 1600KW oil field booster equipment), which can avoid long-distance transportation of crosshead, reduce logistics cost; and without the need to purchase complete crosshead components with bushings, only the bushing needs to be processed separately to realize on-site replacement, reducing spare part storage cost; at the same time, it avoids the equipment loss and labor input of secondary processing, further compresses the processing cost.

[0109] As a further optimization of the embodiment, a benchmark library and an algorithm training library are constructed on the server of the embodiment; wherein the data in the algorithm training library is used to train the gradient boosting tree (GBRT) and the neural network (ANN) to obtain the gradient boosting tree (GBRT) correction model and the neural network (ANN) adaptation model.

[0110] Wherein, the construction steps of the benchmark library and the algorithm training library are as follows:

[0111] 1. Collect basic parameter data, calculation data, actual processing data and error data.

[0112] Wherein, the basic parameter data includes: material parameters (elastic modulus, poisson's ratio) of the crosshead, the bushing and the crosshead pin, structure size (bushing inner and outer diameter, crosshead body hole diameter), working condition parameters (temperature, pressure);

[0113] Wherein, the calculation data includes: the bushing shrinkage calculated by formula (1)~formula (4), the bushing machining size (outer diameter machining size range and inner diameter machining size range);

[0114] Wherein, the actual processing data includes: machine tool processing parameters (feed speed, cutting depth, spindle speed), processing process data (tool wear, processing time), quality detection data (actual size deviation, roundness, surface defects);

[0115] Wherein, the error data includes: the deviation value of the results of formula (1)~formula (4) and the actual processing results.

[0116] 2. Data cleaning and standardization: missing value processing, outlier elimination and data standardization are performed on the collected basic parameter data, calculation data, actual processing data and error data.

[0117] 3. Construct a benchmark library: store the "input parameters-formula calculation results-actual processing feedback" data under standard scenarios, classified by "material combination + size specification" (such as QT600-3 / ZCuPbSn10 material, φ98 / φ86mm size), each data contains basic parameters, core parameters of formula calculation (interference amount, shrinkage amount, processing size), actual processing yield and error value;

[0118] 4. Construct an algorithm training library: integrate the full data of standard scenarios and non-standard scenarios (complex working conditions, new materials, non-standard sizes), labeled by "scene type" (standard scene, transition scene, complex scene), each data contains basic parameters, formula calculation results, actual processing results, error data, for training, verification and iteration of GBRT and ANN, to ensure that the algorithm can cover different application scenarios.

[0119] Example two

[0120] Figure 2 is a block diagram of a crosshead bushing inlay processing system provided by an embodiment of the present application. As shown in Figure 2 , the embodiment provides a crosshead bushing inlay processing system for implementing the crosshead bushing inlay processing method in example one, the system comprising:

[0121] a data acquisition module for acquiring the design size and interference range of the crosshead and the bushing;

[0122] a first calculation module for determining the bushing shrinkage amount under the liquid nitrogen cooling condition based on a preset shrinkage amount standard calculation mode and a machine learning calculation mode constituting a collaborative calculation rule;

[0123] a second calculation module for determining the outer diameter processing size range and the inner diameter processing size range of the bushing according to the bushing shrinkage amount and the interference range;

[0124] a first instruction generation module for generating a processing control instruction based on the outer diameter processing size range and the inner diameter processing size range of the bushing, and sending the processing control instruction to a processing unit, the processing unit performing grinding processing on the bushing in response to the processing control instruction;

[0125] a second instruction generation module for generating an assembly instruction after the grinding processing, and sending the assembly instruction to an assembly unit, the assembly unit performing cooling on the bushing under the liquid nitrogen cooling condition and assembling the cooled bushing into the crosshead in response to the assembly instruction.

[0126] The embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the cross head bush inlay processing method in the embodiment one when executing the computer program.

[0127] The embodiment also provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the cross head bush inlay processing method in the embodiment one.

[0128] The embodiment can accurately calculate the bush shrinkage under the condition of liquid nitrogen cooling through the cooperative calculation rule, and then determine the outer diameter processing size range and the inner diameter processing size range of the bush according to the bush shrinkage, so that the processing unit can finish the bush inner and outer cylindrical surface at one time according to the outer diameter processing size range and the inner diameter processing size range, and then cool the bush under the condition of liquid nitrogen cooling and assemble the cooled bush into the cross head, and when the bush returns to normal temperature, the bush can form a stable interference fit with the cross head.

[0129] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt a computer program product in the form of being implemented on one or more computer usable storage media containing computer usable program codes (including but not limited to disk storage, CD-ROM, optical storage, etc.).

[0130] The present application is described with reference to flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices produce a device implemented in the flowcharts and / or block diagrams. Figure 1 The system that implements the functions specified in one flow or multiple flows and / or blocks Figure 1 The system that implements the functions specified in one flow or multiple flows and / or blocks

[0131] The above is only the embodiment of the present application, and is not used to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of claims of the present application.

Claims

1. A method for inlaying a crosshead bushing, characterized in that, The method includes: Obtain the design dimensions and interference range for the crosshead and bushing; Based on a collaborative calculation rule consisting of a preset standard shrinkage calculation mode and a machine learning calculation mode, the bushing shrinkage under liquid nitrogen cooling conditions is determined. The collaborative calculation rule is as follows: The standard shrinkage calculation mode is invoked to determine the standard shrinkage value; the material and processing conditions of the crosshead and bushing are obtained, and the processing scenario of the bushing is determined through preset rules, which may be a standard scenario, a transitional scenario, or a complex scenario; when the processing scenario is a standard scenario, the standard shrinkage value is directly used as the bushing shrinkage; when the processing scenario is a transitional scenario, the machine learning calculation mode is invoked to predict the shrinkage correction coefficient; the standard shrinkage value is corrected according to the correction coefficient to obtain the corrected shrinkage, which is used as the bushing shrinkage; when the processing scenario is a complex scenario, the machine learning calculation mode is invoked to predict the predicted shrinkage; the predicted shrinkage and the standard shrinkage value are weighted and fused based on preset weighting coefficients to obtain the fused shrinkage, which is used as the bushing shrinkage. Determine the range of outer diameter machining dimensions and inner diameter machining dimensions of the bushing based on the bushing shrinkage and interference range; Based on the outer diameter machining range and inner diameter machining range of the bushing, machining control instructions are generated and sent to the machining unit. The machining unit performs grinding machining on the bushing in response to the machining control instructions. After grinding, an assembly instruction is generated and sent to the assembly unit. When responding to the assembly instruction, the assembly unit cools the bushing under liquid nitrogen cooling conditions and inserts the cooled bushing into the crosshead.

2. The crosshead bushing inlay processing method according to claim 1, characterized in that, The standard calculation method for shrinkage is as follows: Obtain the elastic modulus, Poisson's ratio, nominal outer diameter, and nominal inner diameter of the crosshead, and the elastic modulus, Poisson's ratio, nominal outer diameter, and nominal inner diameter of the bushing; The first coefficient is determined based on the bushing's Poisson's ratio, nominal outer diameter, and nominal inner diameter; The second coefficient is determined based on the Poisson's ratio, nominal outer diameter, and nominal inner diameter of the crosshead; Select an initial value from the interference range as the selection value, and determine the interference pressure based on the selection value, the second coefficient, the first coefficient, the elastic modulus of the crosshead, the elastic modulus of the bushing, and the nominal outer diameter. The standard value of shrinkage is determined based on the interference fit pressure, the elastic modulus of the bushing, the nominal outer diameter, and the nominal inner diameter.

3. The crosshead bushing inlay processing method according to claim 2, characterized in that, The initial value is the middle or maximum value within the range of interference.

4. The crosshead bushing inlay processing method according to claim 2, characterized in that, The method further includes: Record actual processing data under standard scenarios and determine processing deviations; Record the trend of processing deviation. Based on the trend of processing deviation, determine the correction coefficient of the selected value to correct the selected value and obtain the corrected selected value. The corrected selected value is within the interference range.

5. The method for inlaying crosshead bushings according to claim 1, characterized in that, When the processing scenario is a transitional scenario, the machine learning computing mode adopts a gradient boosting tree correction model; when the processing scenario is a complex scenario, the machine learning computing mode adopts a neural network adaptation model.

6. The method for inlaying crosshead bushings according to claim 1, characterized in that, The processing conditions include: processing temperature and processing pressure, and the preset rules are: Establish reference standards for processing temperature, processing pressure, and the material and design dimensions of bushings and crossheads; When the processing temperature, processing pressure, and the material and design dimensions of the bushing and crosshead all meet the reference standards, the processing scenario is the standard scenario. When any parameter in the processing temperature, processing pressure, or the material and design dimensions of the bushing and crosshead deviate from the reference standard, the processing scenario is a transitional scenario. When two or more parameters, such as processing temperature, processing pressure, and the material and design dimensions of the bushing and crosshead, deviate from the reference standard, or when the processing scenario is complex.

7. A crosshead bushing inlay machining system for implementing the crosshead bushing inlay machining method according to any one of claims 1-6, characterized in that, The system includes: The data acquisition module is used to obtain the design dimensions and interference range of the crosshead and bushing; The first calculation module is used to determine the bushing shrinkage under liquid nitrogen cooling conditions based on the collaborative calculation rules consisting of a preset shrinkage standard calculation mode and a machine learning calculation mode. The second calculation module is used to determine the range of outer diameter machining dimensions and inner diameter machining dimensions of the bushing based on the bushing shrinkage and interference range. The first instruction generation module is used to generate machining control instructions based on the outer diameter machining size range and the inner diameter machining size range of the bushing, and send the machining control instructions to the machining unit. The machining unit performs grinding machining on the bushing when responding to the machining control instructions. The second instruction generation module is used to generate assembly instructions after grinding and send the assembly instructions to the assembly unit. When responding to the assembly instructions, the assembly unit cools the bushing under liquid nitrogen cooling conditions and inserts the cooled bushing into the crosshead.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the crosshead bushing inlay machining method according to any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the crosshead bushing inlay machining method as described in any one of claims 1-6.

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