Preparation process of high-precision powder metallurgy air conditioner compressor cylinder body

Abstract

The invention relates to the technical field of powder metallurgy, and discloses a high-precision powder metallurgy air conditioner compressor cylinder body preparation technology which comprises the steps that all raw materials are obtained, the powder quality of each raw material is judged, a raw material adjusting model is formed for the raw materials, and corresponding adjustment is conducted according to the moisture content of the raw materials so that the moisture content of the raw materials can meet the requirement. According to the preparation technology of the high-precision powder metallurgy air conditioner compressor cylinder body, the moisture content of powder raw materials stored in the container is collected, then the overall quality of powder is judged, different raw material adjusting models are formed for the raw materials, the raw materials are correspondingly adjusted according to the different moisture contents, and the moisture contents of the raw materials meet the requirement; the accuracy of data is improved, inaccurate powder quality judgment is avoided, and the qualified rate of workpieces is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy, and particularly to a preparation process for a high-precision powder metallurgy air-conditioning compressor cylinder block. Background Art

[0002] The preparation process for a high-precision powder metallurgy air-conditioning compressor cylinder block is an important part of modern manufacturing technology, involving multiple fields such as materials science, mechanical engineering, and manufacturing processes. Powder metallurgy is an advanced manufacturing technology that uses metal powders as raw materials and prepares the required metal parts through processes such as pressing and sintering. Compared with traditional casting or forging processes, powder metallurgy has the advantages of high material utilization rate, strong manufacturing ability for complex shapes, high precision, and strong controllability.

[0003] An air-conditioning compressor is the core component of an air-conditioning system. The performance of the cylinder block directly affects the efficiency, reliability, and service life of the compressor. The cylinder block needs to have sufficient strength, rigidity, wear resistance, corrosion resistance, and good thermal conductivity. With the increasing demand for high-performance air-conditioning equipment, powder metallurgy technology has been increasingly widely used in the air-conditioning field, especially in the preparation of high-precision and high-performance cylinder blocks. Due to its superior material properties and forming ability, the powder metallurgy process has gradually become the mainstream choice. In recent years, with the development of powder metallurgy materials and processes, more and more new alloy materials (such as iron-based, aluminum-based, magnesium-based, etc.) and advanced forming technologies (such as injection molding, 3D printing, etc.) have been applied to the preparation of compressor cylinder blocks. At the same time, with the acceleration of the industrial automation and intelligentization process, intelligent manufacturing and big data analysis have also begun to play an important role in the powder metallurgy field to achieve higher efficiency and better quality production.

[0004] The existing preparation process for a high-precision powder metallurgy air-conditioning compressor cylinder block cannot collect the moisture content of the powder raw materials stored in a container, and thus cannot judge the overall quality of the powder. It cannot form different raw material adjustment models for the raw materials, and cannot make corresponding adjustments to the raw materials according to their different moisture contents to make the moisture content of the raw materials meet the requirements. It is easy for the collected data to be inaccurate due to different raw material storage methods, resulting in inaccurate powder quality judgment, and further leading to a high unqualified rate of workpieces, and its practicality has certain limitations. Summary of the Invention

[0005] The present invention provides a preparation process for a high-precision powder metallurgy air-conditioning compressor cylinder block to help solve the problems mentioned in the background art.

[0006] The present invention provides the following technical solution: A preparation process for a high-precision powder metallurgy air-conditioning compressor cylinder block, comprising:

[0007] Obtain all raw materials to form a raw material set;

[0008] Obtain the proportion data of each element in the raw material set, which is defined as the raw material proportion;

[0009] Correspond each raw material proportion with each element in the raw material set one by one to form a proportion set;

[0010] Obtain the added materials;

[0011] Put the added materials and all raw materials into the target mixing equipment according to the elements in the proportion set;

[0012] Set the equipment data;

[0013] Control the operation of the target mixing equipment according to the equipment data to form a mixed material;

[0014] Transfer the mixed material to the target mold to form a mold material;

[0015] Set the pressure data;

[0016] Cold press the mold material according to the pressure data to obtain a pressure material;

[0017] Put the pressure material into the target sintering equipment to form a sintered material;

[0018] Perform fine processing on the sintered material to form the target material.

[0019] As an alternative solution of the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block described in the present invention, wherein: perform quality analysis on each element in the raw material set, specifically:

[0020] Obtain the raw material set;

[0021] Successively identify each raw material in the raw material set as the target raw material;

[0022] Perform moisture analysis on the target raw material;

[0023] If the moisture content of the target raw material does not meet the requirements, it is determined that the target raw material cannot be used;

[0024] If the moisture content of the target raw material meets the requirements, it is determined that the target raw material can be used;

[0025] If all elements in the raw material set determine that the target raw material can be used, put all raw materials into the target mixing equipment;

[0026] If there are elements in the raw material set that determine that the target raw material cannot be used, put all the raw materials in the raw material set that determine that the target raw material can be used into the target mixing equipment, and define the raw material that determines that the target raw material cannot be used as the processing raw material;

[0027] Obtain the processing raw material;

[0028] Extract the collection of processing raw materials and define it as the processing collection;

[0029] Extract the number of elements with a moisture content ≥ the maximum value of the content threshold range in the processing collection and define it as the high-water quantity;

[0030] Extract the number of elements with a moisture content ≤ the minimum value of the content threshold range in the processing collection and define it as the low-water quantity;

[0031] If the high-water quantity ≥ the low-water quantity × (1 + 50%), it is determined that the moisture content of the raw material is high;

[0032] If the high-water quantity ≤ the low-water quantity × (1 - 50%), it is determined that the moisture content of the raw material is low;

[0033] If the high-water quantity < the low-water quantity × (1 + 50%) and the high-water quantity > the low-water quantity × (1 - 50%), it is determined that the moisture content of the raw material is uneven;

[0034] Obtain the raw material adjustment model;

[0035] According to the raw material adjustment model and the determination result of the moisture content of the raw material, perform moisture treatment on the processed raw material until the processed raw material can be used, and put the processed raw material into the target mixing equipment.

[0036] As an alternative solution for the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block described in the present invention, wherein: perform moisture analysis on the target raw material, specifically:

[0037] Obtain the container for placing the target raw material and define it as the target container;

[0038] Obtain the container data of the target container;

[0039] Obtain the height of the target raw material in the target container and define it as the target height;

[0040] Generate a raw material model according to the target height and the container data of the target container;

[0041] Set the number of collection points;

[0042] According to the number of collection points, randomly generate collection point positions in the raw material model to form a collection point set;

[0043] Collect the moisture content of the target raw material according to each element in the collection point set and define it as the collected content;

[0044] Correspond each collected content with each element in the collection point set one by one to form a collection;

[0045] Successively recognize each element in the collection as the target content;

[0046] Set the content threshold range;

[0047] If the target content ≥ the maximum value of the content threshold range or the target content ≤ the minimum value of the content threshold range, it is determined that the moisture content at the collection point does not meet the requirements;

[0048] If the target content < the maximum value of the content threshold range and the target content > the minimum value of the content threshold range, it is determined that the moisture content at the collection point meets the requirements;

[0049] If all elements in the collection determine that the moisture content at the collection point meets the requirements, it is determined that the moisture content of the target raw material meets the requirements;

[0050] If there is an element in the collection that determines that the moisture content at the collection point does not meet the requirements, it is determined that the moisture content of the target raw material does not meet the requirements.

[0051] As an alternative solution of the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block described in the present invention, wherein: Obtain a raw material adjustment model, including a mixing adjustment model, specifically:

[0052] Obtain the first powder and the second powder of the raw material, denoted as L1 and L2 respectively;

[0053] Set all the first contents of the first powder L1 to form a water-deficient set;

[0054] Set all the second contents of the second powder L2 to form a water-rich set;

[0055] Map each element in the water-deficient set to each element in the water-rich set one by one to form a simulation set;

[0056] Denote the first content as L A and denote the second content as L B ;

[0057] Calculate the total moisture content L of each element in the simulation set H :

[0058]

[0059] Correspond each total moisture content L H to each element in the simulation set one by one to generate a mixing adjustment model.

[0060] As an alternative solution of the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block described in the present invention, wherein: Obtain a raw material adjustment model, including a water-deficient adjustment model, specifically:

[0061] Obtain the powder exposure area of the raw material, denoted as A;

[0062] Obtain the initial moisture content of the raw material, denoted as M0;

[0063] Set the mass transfer coefficient of the raw material, denoted as k;

[0064] Obtain the environmental humidity of the raw material, denoted as RH;

[0065] Obtain the environmental temperature of the raw material, denoted as C;

[0066] Obtain the saturated water vapor pressure of the raw material at the environmental temperature C, denoted as P s ;

[0067] Calculate the partial pressure P of water vapor in the raw material in the current environment:

[0068] P = RH · P s ;

[0069] Obtain the adsorption constant K of the raw material a ;

[0070] Calculate the equilibrium moisture content M of the raw material e :

[0071]

[0072] Set the target moisture content of the raw material, denoted as M t ;

[0073] Calculate the processing time t when the raw material is adjusted from the initial moisture content M0 to the target moisture content M t when:

[0074]

[0075] When the processing time t is reached, collect the moisture content of the raw material, designated as the secondary content M1;

[0076] If the secondary content M1 ≥ the target moisture content M t × (1 - 1%) and the secondary content M1 ≤ the target moisture content M t × (1 + 1%), then it is determined that the adjustment parameters are appropriate, and record the current parameters;

[0077] If the secondary content M1 < the target moisture content M t × (1 - 1%) or the secondary content M1 > the target moisture content M t × (1 + 1%), then it is determined that the adjustment parameters are inappropriate, adjust the environmental humidity RH, and repeat the above steps until it is determined that the adjustment parameters are appropriate;

[0078] Obtain all the initial moisture content M0, target moisture content M t, environmental humidity RH, environmental temperature C, and treatment time t to form a less-water adjustment model.

[0079] As an alternative embodiment of the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block described in the present invention, wherein: obtaining a raw material adjustment model, including a multi-water adjustment model, specifically:

[0080] Obtain the initial moisture content M0 of the raw material;

[0081] Set the target moisture content M of the raw material t ;

[0082] Obtain the powder mass of the raw material, denoted as powder_mass;

[0083] Obtain a dehumidification device;

[0084] Obtain the solvent used when the raw material is dehumidified by the dehumidification device, and define it as the target solvent;

[0085] Obtain the solvent efficiency of the target solvent, denoted as solvent_efficiency;

[0086] Calculate the required amount of solvent required_solvent for the target solvent:

[0087]

[0088] Calculate the solution concentration target_solvent of the target solvent:

[0089]

[0090] Put the target solvent into the dehumidification device at the solution concentration target_solvent;

[0091] Obtain the secondary content M1 of the raw material;

[0092] If the secondary content M1 ≥ the target moisture content M t ×(1 - 1%) and the secondary content M1 ≤ the target moisture content M t ×(1 + 1%), then it is determined that the adjustment parameters are appropriate, and record the current parameters;

[0093] If the secondary content M1 < the target moisture content M t ×(1 - 1%) or the secondary content M1 > the target moisture content M t ×(1 + 1%), then it is determined that the adjustment parameters are inappropriate, adjust the spray pressure or spray flow of the dehumidification device, and repeat the above steps until it is determined that the adjustment parameters are appropriate;

[0094] Obtain the dehumidification device to adjust the raw material from the initial moisture content M0 to the target moisture content Mt During the process, the processing time t of each solution concentration target_solvent under different spray pressures and different spray flows;

[0095] Obtain all initial moisture contents M0, target moisture contents M t , solution concentrations target_solvent, spray pressures, spray flows, and processing times t to form a multi-water adjustment model.

[0096] As an alternative solution for the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block described in the present invention, wherein: perform moisture treatment on the processing raw materials, specifically:

[0097] If it is determined that the moisture content of the raw materials is uneven, extract the elements corresponding to the small water quantity in the processing collection points and define them as small water collection points;

[0098] Extract the elements corresponding to the large water quantity in the processing collection points and define them as large water collection points;

[0099] Obtain the content threshold corresponding to the processing raw materials and define it as the target adjustment content;

[0100] Obtain the moisture content of each small water collection point and define it as the small water content;

[0101] Respectively record the first content in the mixing adjustment model corresponding to the small water content and the target adjustment content as L A and the total moisture content L H ;

[0102] Extract the second content L corresponding to the target adjustment content and each small water collection point in the mixing adjustment model B , and define it as the adjustment amount;

[0103] Extract the moisture content of each large water collection point and define it as the large water content;

[0104] Map each adjustment amount and each large water content one by one for comparison;

[0105] If the large water content ≥ adjustment amount × (1 - 5%) and the large water content ≤ adjustment amount × (1 + 5%), then determine that the adjustment amount and the large water content are complementary;

[0106] If the large water content < adjustment amount × (1 - 5%) or the large water content > adjustment amount × (1 + 5%), then determine that the adjustment amount and the large water content are not complementary;

[0107] Obtain the quantity of the large water content determined to be complementary to the adjustment amount and define it as the complementary quantity;

[0108] If (the quantity of excessive water - the complementary quantity) = (the quantity of insufficient water - the complementary quantity), then directly stir the processed raw materials evenly;

[0109] If (the quantity of excessive water - the complementary quantity) > (the quantity of insufficient water - the complementary quantity), then it is determined that the moisture content of the raw materials is high;

[0110] If (the quantity of excessive water - the complementary quantity) < (the quantity of insufficient water - the complementary quantity), then it is determined that the moisture content of the raw materials is low.

[0111] As an alternative solution of the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block described in the present invention, wherein: the moisture treatment of the processed raw materials further includes:

[0112] Mix the processed raw materials;

[0113] Obtain the set of collection points;

[0114] Arbitrarily extract the collection content of an element in the set of collection points and define it as the raw material content;

[0115] Obtain the target adjustment content corresponding to the processed raw materials;

[0116] Obtain the current ambient temperature of the processed raw materials;

[0117] Correspond the raw material content, the target adjustment content, and the current ambient temperature to the initial moisture content M0, the target moisture content M t and the ambient temperature in the low-water adjustment model;

[0118] Extract all the ambient humidity RH and the processing time t corresponding to the raw material content, the target adjustment content, and the current ambient temperature in the low-water adjustment model;

[0119] Extract the processing time t with the smallest value and define it as the target processing time;

[0120] Extract the ambient humidity RH corresponding to the target processing time and define it as the target ambient humidity;

[0121] Adjust the current ambient humidity of the processed raw materials to the target ambient humidity and continue for the target processing time;

[0122] Identify the processed raw materials as the target raw materials and conduct a moisture analysis on the target raw materials;

[0123] If the moisture content of the target raw materials does not meet the requirements, then it is determined that the processed raw materials cannot be used, and continue to conduct moisture treatment on the processed raw materials;

[0124] If the moisture content of the target raw materials meets the requirements, then it is determined that the processed raw materials can be used.

[0125] As an alternative to the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block described in the present invention, it further includes:

[0126] Mix the processed raw materials;

[0127] Obtain the set of collection points;

[0128] Randomly extract the raw material content of an element in the set of collection points;

[0129] Obtain the target adjustment content corresponding to the processed raw materials;

[0130] Correspond the raw material content and the target adjustment content to the initial moisture content M0 and the target moisture content M in the multi-water adjustment model respectively t ;

[0131] Extract the solution concentration target_solvent corresponding to the raw material content and the target adjustment content in the multi-water adjustment model, and define it as the target concentration;

[0132] Extract all the spray pressures, spray flows and treatment time t corresponding to the raw material content and the target adjustment content in the multi-water adjustment model;

[0133] Extract the target treatment time with the smallest value;

[0134] Extract all the spray pressures and spray flows corresponding to the target treatment time;

[0135] Extract the spray flow with the largest flow rate and define it as the target flow rate;

[0136] Extract the spray pressure corresponding to the target flow rate and define it as the target pressure;

[0137] Put the processed raw materials into the dehumidification equipment, and put the target solvent into the dehumidification equipment at the target concentration;

[0138] The dehumidification equipment operates for the target treatment time at the target flow rate and the target pressure;

[0139] Identify the processed raw materials as target raw materials and conduct moisture analysis on the target raw materials;

[0140] If the moisture content of the target raw materials does not meet the requirements, it is determined that the processed raw materials cannot be used, and the moisture treatment of the processed raw materials is continued;

[0141] If the moisture content of the target raw materials meets the requirements, it is determined that the processed raw materials can be used.

[0142] The present invention has the following beneficial effects:

[0143] 1. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block forms a model for the powder storage container, randomly generates several collection points, collects the moisture content of the powder raw materials in the container, judges each collection data separately, judges whether the moisture content of each collection point is within the threshold range, and then judges the overall quality of the powder. When the moisture content of a certain collection point is not within the threshold range, it indicates that the powder quality does not meet the requirements, and corresponding adjustments need to be made to make the moisture content of the raw materials meet the requirements, improve the accuracy of the data, avoid inaccurate judgment of the powder quality, and improve the workpiece qualification rate.

[0144] 2. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block forms different raw material adjustment models by simulating the raw materials under different conditions. When the moisture content is uneven, that is, when the moisture content of some powders is high and the moisture content of some powders is low, determine the overall moisture content after mixing and form a mixing adjustment model. When the moisture content is too low, adjust and simulate the environmental humidity to determine the change of the moisture content of the powder under different humidities and different treatment times, and then form a less-water adjustment model. When the moisture content is too high, simulate the parameter adjustment of the dehumidification equipment to determine the change of the moisture content of the powder under different parameters of the dehumidification equipment, and then form a more-water adjustment model, improve the accuracy of the data, avoid inaccurate judgment of the powder quality, and improve the workpiece qualification rate.

[0145] 3. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block obtains the determination result of the moisture content of the raw materials, extracts the corresponding raw material adjustment model, and makes corresponding adjustments to the raw materials according to their different moisture contents to make the moisture content of the raw materials meet the requirements, improve the accuracy of the data, avoid inaccurate judgment of the powder quality, and improve the workpiece qualification rate. Brief Description of the Drawings

[0146] Figure 1 It is the process flow chart of the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block of the present invention;

[0147] Figure 2 It is the process flow chart of the powder quality judgment and adjustment of the present invention. Detailed Embodiments

[0148] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0149] Embodiment 1, A preparation process of a high-precision powder metallurgy air-conditioning compressor cylinder block, refer to Figure 1, including:

[0150] Obtain all raw materials to form a raw material set, where the raw materials are alloy powders of specific components;

[0151] Obtain the proportion data of each element in the raw material set and define it as the raw material proportion;

[0152] Correspond each raw material proportion to each element in the raw material set one by one to form a proportion set;

[0153] Obtain the additive material, where the additive material is a lubricant;

[0154] According to the elements in the proportion set, put the additive material and all raw materials into the target mixing device, where the target mixing device is a high-speed powder mixer;

[0155] Set the device data, where the device data is the rotation speed and time of the high-speed powder mixer;

[0156] According to the device data, control the operation of the target mixing device to form a mixed material. The powder and lubricant in the high-speed powder mixer are fully mixed at a specific rotation speed and time to ensure uniform mixing of the powder;

[0157] Transfer the mixed material to the target mold to form a mold material;

[0158] Set the pressure data, where the pressure data is the value of the pressing pressure;

[0159] According to the pressure data, cold press the mold material to obtain a pressure material, where the pressure material is a cylinder blank;

[0160] Put the pressure material into the target sintering device to form a sintered material. The cylinder blank is sintered in a protective atmosphere to make it densified;

[0161] Perform fine processing on the sintered material to form the target material, that is, perform machining such as turning and grinding on the sintered cylinder blank, and then perform subsequent processes such as heat treatment to meet the required accuracy and performance requirements to form the required air-conditioning compressor cylinder;

[0162] Through the above method, collect the moisture content of the powder raw materials stored in the container, and then judge the overall quality of the powder. Form different raw material adjustment models for the raw materials, and make corresponding adjustments to the raw materials according to their different moisture contents, so that the moisture content of the raw materials meets the requirements, improve the accuracy of the data, avoid inaccurate judgment of the powder quality, and improve the qualified rate of the workpieces;

[0163] Example 2. This example is an improvement made on the basis of Example 1. Refer to Figure 2, for the preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block, perform quality analysis on each element in the raw material set, specifically as follows:

[0164] Obtain the raw material set;

[0165] Successively identify each raw material in the raw material set as the target raw material;

[0166] Conduct moisture analysis on the target raw material;

[0167] If the moisture content of the target raw material does not meet the requirements, determine that the target raw material cannot be used;

[0168] If the moisture content of the target raw material meets the requirements, determine that the target raw material can be used;

[0169] If all elements in the raw material set determine that the target raw material can be used, put all the raw materials into the target mixing equipment;

[0170] If there are elements in the raw material set that determine that the target raw material cannot be used, put all the raw materials in the raw material set that determine that the target raw material can be used into the target mixing equipment, and define the raw materials that determine that the target raw material cannot be used as the processing raw materials;

[0171] Obtain the processing raw materials;

[0172] Extract the collection set of the processing raw materials and define it as the processing collection set;

[0173] Extract the number of elements in the processing collection set whose moisture content is ≥ the maximum value of the content threshold range and define it as the large water quantity;

[0174] Extract the number of elements in the processing collection set whose moisture content is ≤ the minimum value of the content threshold range and define it as the small water quantity;

[0175] If the large water quantity ≥ the small water quantity × (1 + 50%), determine that the moisture content of the raw materials is large;

[0176] If the large water quantity ≤ the small water quantity × (1 - 50%), determine that the moisture content of the raw materials is small;

[0177] If the large water quantity < the small water quantity × (1 + 50%) and the large water quantity > the small water quantity × (1 - 50%), determine that the moisture content of the raw materials is uneven;

[0178] Obtain the raw material adjustment model;

[0179] According to the raw material adjustment model and the determination result of the raw material moisture content, perform moisture treatment on the processing raw materials until the processing raw materials can be used, and put the processing raw materials into the target mixing equipment.

[0180] Among them, conducting moisture analysis on the target raw material specifically means:

[0181] Obtain the container for placing the target raw material and define it as the target container;

[0182] Obtain the container data of the target container, where the container data is the bottom area of the container;

[0183] Obtain the height of the target raw material in the target container and define it as the target height;

[0184] Generate a raw material model based on the target height and the container data of the target container;

[0185] Set the number of collection points, and the number of collection points is 10;

[0186] According to the number of collection points, randomly generate collection point positions in the raw material model to form a collection point set. Among them, for the randomly generated collection point positions in the raw material model, there will be a certain distance between each collection point position, which can ensure that the data for judging the moisture content of the whole raw material collected can be more accurate;

[0187] Collect the moisture content of the target raw material according to each element in the collection point set and define it as the collected content;

[0188] Correspond each collected content with each element in the collection point set one by one to form a collection set;

[0189] Successively recognize each element in the collection set as the target content;

[0190] Set the content threshold range, where the content threshold range is the range of the moisture content of the raw material corresponding to the requirements such as the strength required for cylinder body manufacturing. If it exceeds this range, it means that the moisture content of the raw material is too low or too high, which will affect the subsequent manufacturing and cause the produced workpieces to not meet the requirements;

[0191] If the target content ≥ the maximum value of the content threshold range or the target content ≤ the minimum value of the content threshold range, then determine that the moisture content of this collection point does not meet the requirements;

[0192] If the target content < the maximum value of the content threshold range and the target content > the minimum value of the content threshold range, then determine that the moisture content of this collection point meets the requirements;

[0193] If all elements in the collection set determine that the moisture content of this collection point meets the requirements, then determine that the moisture content of the target raw material meets the requirements;

[0194] If there is an element in the collection set that determines that the moisture content of this collection point does not meet the requirements, then determine that the moisture content of the target raw material does not meet the requirements.

[0195] This embodiment also provides to perform moisture treatment on the processed raw material, specifically:

[0196] If it is determined that the moisture content of the raw material is uneven, extract the element corresponding to the amount of less water in the processed collection set and define it as the less water collection point;

[0197] Extract the element corresponding to the amount of more water in the processed collection set and define it as the more water collection point;

[0198] Obtain the content threshold corresponding to the processed raw material and define it as the target adjusted content. The content threshold is the moisture content of the raw material corresponding to the requirements such as the strength required during cylinder manufacturing;

[0199] Obtain the moisture content of each less water collection point and define it as the less water content;

[0200] Record the less water content and the target adjusted content corresponding to the first content in the mixing adjustment model as L A and the total moisture content L H ;

[0201] Extract the target adjusted content and the second content L corresponding to each less water collection point in the mixing adjustment model B , and define it as the adjustment amount;

[0202] Extract the moisture content of each more water collection point and define it as the more water content;

[0203] Compare each adjustment amount with each more water content one by one through mapping;

[0204] If the more water content ≥ the adjustment amount × (1 - 5%) and the more water content ≤ the adjustment amount × (1 + 5%), it is determined that the adjustment amount and the more water content are complementary;

[0205] If the more water content < the adjustment amount × (1 - 5%) or the more water content > the adjustment amount × (1 + 5%), it is determined that the adjustment amount and the more water content are not complementary;

[0206] Obtain the quantity of the more water content determined to be complementary to the adjustment amount and define it as the complementary quantity;

[0207] If (the quantity of more water - the complementary quantity) = (the quantity of less water - the complementary quantity), directly stir the processed raw material evenly;

[0208] If (the quantity of more water - the complementary quantity) > (the quantity of less water - the complementary quantity), it is determined that the moisture content of the raw material is large;

[0209] If (the quantity of more water - the complementary quantity) < (the quantity of less water - the complementary quantity), it is determined that the moisture content of the raw material is small.

[0210] Among them, the moisture treatment of the processed raw material also includes:

[0211] Mix the processing raw materials;

[0212] Obtain the set of collection points;

[0213] Arbitrarily extract the collection content of an element in the set of collection points and define it as the raw material content;

[0214] Obtain the target adjustment content corresponding to the processing raw materials;

[0215] Obtain the current ambient temperature of the processing raw materials;

[0216] Correspond the raw material content, the target adjustment content, and the current ambient temperature to the initial moisture content M0, the target moisture content M t and the ambient temperature in the less-water adjustment model;

[0217] Extract all the ambient humidity RH and processing time t corresponding to the raw material content, the target adjustment content, and the current ambient temperature in the less-water adjustment model;

[0218] Extract the processing time t with the smallest value and define it as the target processing time;

[0219] Extract the ambient humidity RH corresponding to the target processing time and define it as the target ambient humidity;

[0220] Adjust the current ambient humidity of the processing raw materials to the target ambient humidity and continue for the target processing time;

[0221] Identify the processing raw materials as the target raw materials and conduct moisture analysis on the target raw materials;

[0222] If the moisture content of the target raw materials does not meet the requirements, determine that the processing raw materials cannot be used and continue to conduct moisture treatment on the processing raw materials;

[0223] If the moisture content of the target raw materials meets the requirements, determine that the processing raw materials can be used.

[0224] Among them, conducting moisture treatment on the processing raw materials further includes:

[0225] Mix the processing raw materials;

[0226] Obtain the set of collection points;

[0227] Arbitrarily extract the raw material content of an element in the set of collection points;

[0228] Obtain the target adjustment content corresponding to the processing raw materials;

[0229] Correspond the raw material content and the target adjustment content to the initial moisture content M0 and the target moisture content M in the more-water adjustment model t ;

[0230] Extract the solution concentration target_solvent corresponding to the raw material content and the target adjusted content in the multi-water adjustment model, and define it as the target concentration;

[0231] Extract all the spray pressures, spray flows, and treatment time t corresponding to the raw material content and the target adjusted content in the multi-water adjustment model;

[0232] Extract the target treatment time with the smallest value;

[0233] Extract all the spray pressures and spray flows corresponding to the target treatment time;

[0234] Extract the spray flow with the largest flow rate and define it as the target flow rate;

[0235] Extract the spray pressure corresponding to the target flow rate and define it as the target pressure;

[0236] Put the processed raw material into the dehumidifying device, and put the target solvent into the dehumidifying device at the target concentration;

[0237] The dehumidifying device operates at the target flow rate and target pressure for the target treatment time;

[0238] Identify the processed raw material as the target raw material and conduct a moisture analysis on the target raw material;

[0239] If the moisture content of the target raw material does not meet the requirements, determine that the processed raw material cannot be used, and continue to conduct moisture treatment on the processed raw material;

[0240] If the moisture content of the target raw material meets the requirements, determine that the processed raw material can be used.

[0241] Example 3. This example is an improvement based on Example 2. In this example, a raw material adjustment model is obtained, including a mixing adjustment model. Specifically:

[0242] Obtain the first powder and the second powder of the raw material, denoted as L1 and L2 respectively. The first powder is the powder with the moisture content lower than the minimum value of the content threshold range in the raw material, and the second powder is the powder with the moisture content higher than the maximum value of the content threshold range in the raw material;

[0243] Set all the first contents of the first powder L1 to form a low-water set. The first content is all the content values with the moisture content lower than the minimum value of the content threshold range;

[0244] Set all the second contents of the second powder L2 to form a high-water set. The second content is all the content values with the moisture content higher than the maximum value of the content threshold range;

[0245] Map each element in the low-water set to each element in the high-water set one by one to form a simulation set;

[0246] Denote the first content as L A , and denote the second content as L B ;

[0247] Calculate the total moisture content L of each element in the simulation set H :

[0248]

[0249] Correspond each total moisture content L H to each element in the simulation set one by one to generate a mixing adjustment model.

[0250] This embodiment also provides obtaining a raw material adjustment model, including a water reduction adjustment model, specifically:

[0251] Obtain the powder exposure area of the raw material, denoted as A;

[0252] Obtain the initial moisture content of the raw material, denoted as M0;

[0253] Set the mass transfer coefficient of the raw material, denoted as k, and the mass transfer coefficient k is 0.05 - 0.1 kg / (m 2 ·h);

[0254] Obtain the environmental humidity of the raw material, denoted as RH;

[0255] Obtain the environmental temperature of the raw material, denoted as C;

[0256] Obtain the saturated water vapor pressure of the raw material at the environmental temperature C, denoted as P s ;

[0257] Calculate the partial pressure P of water vapor in the current environment of the raw material:

[0258] P = RH·P s ;

[0259] Obtain the adsorption constant K of the raw material a ;

[0260] Calculate the equilibrium moisture content M of the raw material e :

[0261]

[0262] Set the target moisture content of the raw material, denoted as M t ;

[0263] Calculate the processing time t when the raw material is adjusted from the initial moisture content M0 to the target moisture content M t :

[0264]

[0265] When reaching the processing time t, collect the moisture content of the raw material, which is defined as the secondary content M1;

[0266] If the secondary content M1 ≥ the target moisture content M t ×(1 - 1%) and the secondary content M1 ≤ the target moisture content M t ×(1 + 1%), then it is determined that the adjustment parameters are appropriate, and record the current parameters;

[0267] If the secondary content M1 < the target moisture content M t ×(1 - 1%) or the secondary content M1 > the target moisture content M t ×(1 + 1%), then it is determined that the adjustment parameters are inappropriate. Adjust the environmental humidity RH, and repeat the above steps until it is determined that the adjustment parameters are appropriate;

[0268] Obtain all the initial moisture content M0, target moisture content M t , environmental humidity RH, environmental temperature C, and processing time t to form a water shortage adjustment model.

[0269] This embodiment also provides obtaining a raw material adjustment model, including a water excess adjustment model, specifically:

[0270] Obtain the initial moisture content M0 of the raw material;

[0271] Set the target moisture content M of the raw material t ;

[0272] Obtain the powder mass of the raw material, denoted as powder_mass;

[0273] Obtain a dehumidifying device, and the dehumidifying device is a vacuum spray dryer;

[0274] Obtain the solvent used when the raw material is dehumidified by the dehumidifying device, which is defined as the target solvent;

[0275] Obtain the solvent efficiency of the target solvent, denoted as solvent_efficiency, and the solvent efficiency is the mass of moisture that can be carried away by each unit mass of the solvent;

[0276] Calculate the required amount of solvent required_solvent for the target solvent:

[0277]

[0278] Calculate the solution concentration target_solvent of the target solvent:

[0279]

[0280] Put the target solvent into the dehumidifying equipment at a solution concentration of target_solvent;

[0281] Obtain the secondary content M1 of the raw material;

[0282] If the secondary content M1 ≥ the target moisture content M t × (1 - 1%) and the secondary content M1 ≤ the target moisture content M t × (1 + 1%), it is determined that the adjustment parameters are appropriate, and record the current parameters;

[0283] If the secondary content M1 < the target moisture content M t × (1 - 1%) or the secondary content M1 > the target moisture content M t × (1 + 1%), it is determined that the adjustment parameters are inappropriate. Adjust the spray pressure or spray flow rate of the dehumidifying equipment, and repeat the above steps until it is determined that the adjustment parameters are appropriate. Due to too high drying temperature, uneven atomization particle size resulting in local over-drying or over-wetting, it may cause powder agglomeration or caking. The spray pressure directly affects the size and uniformity of the atomization particle size. Appropriately increasing the spray pressure can make the solution break into finer droplets more fully, thereby obtaining a more uniform atomization particle size, reducing the situation of local over-drying or over-wetting, and reducing the possibility of powder agglomeration or caking. The spray flow rate cooperates with the spray pressure and jointly affects the atomization effect and the drying process. An appropriate spray flow rate can ensure the uniform distribution of the solution in the drying chamber, avoiding local over-wetting caused by too large a flow rate or insufficient drying caused by too small a flow rate;

[0284] Obtain the processing time t of each solution concentration target_solvent at different spray pressures and different spray flow rates during the process of the dehumidifying equipment adjusting the raw material from the initial moisture content M0 to the target moisture content M t ;

[0285] Obtain all the initial moisture content M0, target moisture content M t 、solution concentration target_solvent, spray pressure, spray flow rate, and processing time t to form a multi-water adjustment model;

[0286] Adjust the spray pressure or spray flow rate of the dehumidifying equipment, specifically:

[0287] First, adjust the spray pressure of the dehumidifying equipment;

[0288] According to the properties of the solution (such as viscosity, surface tension, etc.) and the requirements of the drying equipment, set an initial spray pressure;

[0289] Within a certain range (such as 0.4 - 0.8 MPa), gradually adjust the spray pressure at intervals of 0.1 MPa. After each adjustment, conduct a spray experiment and collect samples of the atomized droplets;

[0290] Use equipment such as a laser particle size analyzer to analyze the particle size of the collected droplet samples, evaluate the atomization particle size uniformity under different spray pressures, and select the spray pressure with the most uniform atomization particle size and meeting the requirements as the optimized parameter;

[0291] Adopt the optimized spray pressure during the actual drying process, observe the drying state and agglomeration situation of the powder. If it always does not meet the requirements, adjust the spray flow rate of the dehumidifying equipment;

[0292] Determine a reasonable spray flow rate range according to the processing capacity of the drying equipment and the properties of the solution;

[0293] Within the flow rate range, adjust the spray flow rate at intervals of 5 L / h, while keeping the spray pressure unchanged, and conduct multiple spray drying experiments;

[0294] Observe indicators such as the drying state, agglomeration situation, and drying time of the powder after each experiment, evaluate the drying effect under different spray flow rates, and select the spray flow rate with the best drying effect and capable of avoiding powder agglomeration as the optimized parameter;

[0295] During the actual production process, dynamically adjust the spray flow rate according to the real-time state of the powder and the drying requirements to ensure the stability of the drying process and the product quality.

[0296] In this embodiment, collect the moisture content of the powder raw material stored in the container, and then judge the overall quality of the powder, form different raw material adjustment models for the raw material, and make corresponding adjustments to the raw material according to its different moisture contents, so that the moisture content of the raw material meets the requirements, improve the accuracy of the data, avoid inaccurate judgment of the powder quality, and improve the workpiece qualification rate.

Claims

1. A preparation process for a high-precision powder metallurgy air-conditioning compressor cylinder block, characterized in that: Including: Obtain all raw materials to form a raw material set; Obtain the proportion data of each element in the raw material set, defined as the raw material proportion; Correspond each raw material proportion with each element in the raw material set one by one to form a proportion set; Obtain the added materials; Put the added materials and all raw materials into the target mixing equipment according to the elements in the proportion set; Set the equipment data; Control the operation of the target mixing equipment according to the equipment data to form a mixed material; Transfer the mixed material to the target mold to form a mold material; Set the pressure data; Cold press the mold material according to the pressure data to obtain a pressure material; Put the pressure material into the target sintering equipment to form a sintered material; Perform fine processing on the sintered material to form the target material.

2. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block according to claim 1, characterized in that: Conduct quality analysis on each element in the raw material set specifically as follows: Obtain the raw material set; Successively identify each raw material in the raw material set as the target raw material; Conduct moisture analysis on the target raw material; If the moisture content of the target raw material does not meet the requirements, determine that the target raw material cannot be used; If the moisture content of the target raw material meets the requirements, determine that the target raw material can be used; If all elements in the raw material set determine that the target raw material can be used, put all the raw materials into the target mixing equipment; If there are elements in the raw material set that determine that the target raw material cannot be used, put all the raw materials in the raw material set that determine that the target raw material can be used into the target mixing equipment, and define the raw materials that determine that the target raw material cannot be used as the processing raw materials; Obtain the processing raw materials; Extract the collection set of the processing raw materials, defined as the processing collection set; Extract the number of elements in the processing collection set whose moisture content is ≥ the maximum value of the content threshold range, defined as the high-water quantity; Extract the number of elements in the processing collection set whose moisture content is ≤ the minimum value of the content threshold range, defined as the low-water quantity; If the high-water quantity ≥ the low-water quantity × (1 + 50%), determine that the moisture content of the raw materials is high; If the high-water quantity ≤ the low-water quantity × (1 - 50%), determine that the moisture content of the raw materials is low; If the high-water quantity < the low-water quantity × (1 + 50%) and the high-water quantity > the low-water quantity × (1 - 50%), determine that the moisture content of the raw materials is uneven; Obtain the raw material adjustment model; According to the raw material adjustment model and the determination result of the raw material moisture content, perform moisture treatment on the processing raw materials until the processing raw materials can be used, and put the processing raw materials into the target mixing equipment.

3. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block according to claim 2, characterized in that: Conduct moisture analysis on the target raw material specifically as follows: Obtain the container for placing the target raw material, defined as the target container; Obtain the container data of the target container; Obtain the height of the target raw material in the target container, defined as the target height; Generate a raw material model according to the target height and the container data of the target container; Set the number of collection points; Arbitrarily generate collection point positions in the raw material model according to the number of collection points to form a collection point set; Collect the moisture content of the target raw material according to each element in the collection point set, defined as the collected content; Correspond each collected content with each element in the collection point set one by one to form a collection set; Successively identify each element in the collection set as the target content; Set the content threshold range; If the target content ≥ the maximum value of the content threshold range or the target content ≤ the minimum value of the content threshold range, it is determined that the moisture content of this collection point does not meet the requirements; If the target content < the maximum value of the content threshold range and the target content > the minimum value of the content threshold range, it is determined that the moisture content of this collection point meets the requirements; If all elements in the collection determine that the moisture content of this collection point meets the requirements, it is determined that the moisture content of the target raw material meets the requirements; If there is an element in the collection that determines that the moisture content of this collection point does not meet the requirements, it is determined that the moisture content of the target raw material does not meet the requirements.

4. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block according to claim 2, characterized in that: Obtain a raw material adjustment model, including a mixing adjustment model, specifically: Obtain the first powder and the second powder of the raw material, denoted as L1 and L2 respectively; Set all the first contents of the first powder L1 to form a low-water set; Set all the second contents of the second powder L2 to form a high-water set; Map each element in the low-water set to each element in the high-water set one by one to form a simulation set; Denote the first content as L A and denote the second content as L B ; Calculate the total moisture content L of each element in the computational simulation set H : Associate each total moisture content L H with each element in the simulation set one by one to generate a mixed adjustment model.

5. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block according to claim 4, characterized in that: Obtain a raw material adjustment model, including a low-water adjustment model, specifically: Obtain the powder exposed area of the raw material, denoted as A; Obtain the initial moisture content of the raw material, denoted as M0; Set the mass transfer coefficient of the raw material, denoted as k; Obtain the environmental humidity of the raw material, denoted as RH; Obtain the environmental temperature of the raw material, denoted as C; Obtain the saturated water vapor pressure of the raw material at the environmental temperature C, denoted as P s ; Calculate the partial pressure P of water vapor in the raw material in the current environment: P = RH·P s ; Obtain the adsorption constant K of the raw material a ; Calculate the equilibrium moisture content M of the raw material e : Set the target moisture content of the raw material, denoted as M t ; The processing time t when the calculated raw material is adjusted from the initial moisture content M0 to the target moisture content M t is as follows: When the processing time t is reached, collect the moisture content of the raw material, designated as the secondary content M1; If the secondary content M1 ≥ the target moisture content M t × (1 - 1%) and the secondary content M1 ≤ the target moisture content M t × (1 + 1%), it is determined that the adjustment parameters are appropriate, and the current parameters are recorded; If the secondary content M1 < the target moisture content M t × (1 - 1%) or the secondary content M1 > the target moisture content M t × (1 + 1%), it is determined that the adjustment parameter is inappropriate. Adjust the environmental humidity RH and repeat the above steps until it is determined that the adjustment parameter is appropriate; Obtain all the initial moisture content M0, target moisture content M t , ambient humidity RH, ambient temperature C, and treatment time t to form a water reduction adjustment model.

6. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block according to claim 5, characterized in that: Obtain a raw material adjustment model, including a high-water adjustment model, specifically: Obtain the initial moisture content M0 of the raw material; Set the target moisture content M of the raw material t ; Obtain the powder mass of the raw material, denoted as powder_mass; Obtain a dehumidification device; Obtain the solvent used when the raw material is dehumidified by the dehumidification device, designated as the target solvent; Obtain the solvent efficiency of the target solvent, denoted as solvent_efficiency; Calculate the required solvent amount required_solvent of the target solvent: Calculate the solution concentration target_solvent of the target solvent: Put the target solvent into the dehumidification device at the solution concentration target_solvent; Obtain the secondary content M1 of the raw material; If the secondary content M1 ≥ the target moisture content M t × (1 - 1%) and the secondary content M1 ≤ the target moisture content M t × (1 + 1%), it is determined that the adjustment parameters are appropriate, and the current parameters are recorded; If the secondary content M1 < the target moisture content M t × (1 - 1%) or the secondary content M1 > the target moisture content M t × (1 + 1%), it is determined that the adjustment parameter is inappropriate. Adjust the spray pressure or spray flow rate of the dehumidification equipment, and repeat the above steps until it is determined that the adjustment parameter is appropriate; Obtain the processing time t of each solution concentration target_solvent at different spray pressures and different spray flows during the process of adjusting the raw material from the initial moisture content M0 to the target moisture content M by the dehumidification device; t ​ Obtain all the initial moisture content M0 and the target moisture content M t , solution concentration target_solvent, spray pressure, spray flow rate, and treatment time t to form a multi-water adjustment model.

7. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block according to claim 2, characterized in that: Perform moisture treatment on the processed raw material, specifically: If it is determined that the moisture content of the raw material is uneven, extract the elements corresponding to the low-water quantity in the processing collection, designated as the low-water collection points; Extract the elements corresponding to the high-water quantity corresponding amount in the processing collection, designated as the high-water collection points; Obtain the content threshold corresponding to the processed raw material, designated as the target adjustment content; Obtain the moisture content of each low-water collection point, designated as the low-water content; The first content in the mixing adjustment model corresponding to the low water content and the target adjustment content is denoted as L A and the total water content L H ; Extract the target adjusted content and the corresponding second content L of each water-scarce collection point within the mixed adjustment model B , which is defined as a small adjustment; Extract the moisture content of each high-water collection point, designated as the high-water content; Map each adjusted small amount to each high-water content one by one for comparison; If the high-water content ≥ the adjusted small amount × (1 - 5%) and the high-water content ≤ the adjusted small amount × (1 + 5%), it is determined that this adjusted small amount and this high-water content are complementary; If the high-water content < the adjusted small amount × (1 - 5%) or the high-water content > the adjusted small amount × (1 + 5%), it is determined that this adjusted small amount and this high-water content are not complementary; Obtain the quantity of the high-water content that determines that this adjusted small amount and this high-water content are complementary, designated as the complementary quantity; If (the quantity of excessive water - the complementary quantity) = (the quantity of insufficient water - the complementary quantity), then directly stir the processing raw materials evenly; If (the quantity of excessive water - the complementary quantity) > (the quantity of insufficient water - the complementary quantity), then it is determined that the moisture content of the raw materials is high; If (the quantity of excessive water - the complementary quantity) < (the quantity of insufficient water - the complementary quantity), then it is determined that the moisture content of the raw materials is low.

8. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block according to claim 7, characterized in that: The moisture treatment of the processing raw materials also includes: Mix the processing raw materials; Obtain the set of collection points; Arbitrarily extract the collection content of an element in the set of collection points and define it as the raw material content; Obtain the target adjustment content corresponding to the processing raw materials; Obtain the current ambient temperature of the processing raw materials; Correspond the raw material content, the target adjusted content, and the current ambient temperature to the initial moisture content M0, the target moisture content M t and the ambient temperature in the less-water adjustment model respectively; Extract all the ambient humidity RH and processing time t corresponding to the raw material content, target adjustment content, and current ambient temperature in the insufficient water adjustment model; Extract the processing time t with the smallest value and define it as the target processing time; Extract the ambient humidity RH corresponding to the target processing time and define it as the target ambient humidity; Adjust the current ambient humidity of the processing raw materials to the target ambient humidity and continue for the target processing time; Identify the processing raw materials as target raw materials and conduct moisture analysis on the target raw materials; If the moisture content of the target raw materials does not meet the requirements, then it is determined that the processing raw materials cannot be used, and continue to conduct moisture treatment on the processing raw materials; If the moisture content of the target raw materials meets the requirements, then it is determined that the processing raw materials can be used.

9. The preparation process of the high-precision powder metallurgy air-conditioning compressor cylinder block according to claim 8, characterized in that: The moisture treatment of the processing raw materials also includes: Mix the processing raw materials; Obtain the set of collection points; Arbitrarily extract the raw material content of an element in the set of collection points; Obtain the target adjustment content corresponding to the processing raw materials; The raw material content and the target adjusted content are respectively corresponded to the initial moisture content M0 and the target moisture content M in the multi-water adjustment model t ; Extract the solution concentration target_solvent corresponding to the raw material content and target adjustment content in the excessive water adjustment model and define it as the target concentration; Extract all the spray pressures, spray flows, and processing time t corresponding to the raw material content and target adjustment content in the excessive water adjustment model; Extract the target processing time with the smallest value; Extract all the spray pressures and spray flows corresponding to the target processing time; Extract the spray flow with the largest flow rate and define it as the target flow rate; Extract the spray pressure corresponding to the target flow rate and define it as the target pressure; Put the processing raw materials into the dehumidification equipment and put the target solvent into the dehumidification equipment at the target concentration; The dehumidification equipment operates at the target flow rate and target pressure for the target processing time; Identify the processing raw materials as target raw materials and conduct moisture analysis on the target raw materials; If the moisture content of the target raw materials does not meet the requirements, then it is determined that the processing raw materials cannot be used, and continue to conduct moisture treatment on the processing raw materials; If the moisture content of the target raw materials meets the requirements, then it is determined that the processing raw materials can be used.

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