Method for predicting cutting machining deformation of aviation thin-walled parts

Abstract

The invention discloses a method for predicting cutting deformation of aviation thin-walled parts, which comprises the following steps of: performing multi-group cutting on the aviation thin-walled parts, and monitoring part materials, cutting heat conduction coefficients, inter-chip friction coefficients and chip separation coefficients while machining each group of parts; a cutting process model is established for the selected part according to a part material, a cutting heat conduction coefficient, an inter-chip friction coefficient and a chip separation coefficient, and three-dimensional simulation is conducted through the model. According to the aviation thin-wall part cutting machining deformation prediction method, 3D simulation is conducted on part cutting machining through the cutting process model, the influences of part materials, the cutting heat conduction coefficient, the inter-chip friction coefficient and the cutting chip separation coefficient on part machining deformation force are analyzed, and the cutting process model and a part three-dimensional model are combined, so that part machining deformation is predicted. And experiment and simulation are carried out, and the deformation force is analyzed and predicted according to the cutting machining change of the part.

Description

Technical Field

[0001] The invention relates to the technical field of deformation prediction of parts cutting processing, and in particular to a method for predicting deformation of aviation thin-walled parts cutting processing. Background Art

[0002] The part cutting deformation prediction method is a method for simulating and analyzing part cutting. In order to achieve the purpose of weight reduction and improve specific strength, thin-walled parts made of aviation aluminum alloys and other materials are widely used in the aviation industry. In the process of precision cutting, the local elastic deformation of thin-walled workpieces under the action of cutting force, the overall processing deformation caused by uneven distribution of residual stress, and the vibration phenomenon of the processing system are three prominent problems that affect the processing quality and precision of thin-walled parts. With the continuous development of science and technology, people's manufacturing process requirements for part cutting deformation prediction methods are getting higher and higher.

[0003] The existing methods for predicting deformation during cutting of parts have certain drawbacks when used. First, the existing methods for predicting deformation during cutting of parts are not comprehensive when performing analysis, and cannot simulate and predict the deformation force very well, which is not conducive to people's use. In addition, the existing methods for predicting deformation during cutting of parts cannot detect and analyze parts very well, and the accuracy cannot meet the requirements very well, which brings certain adverse effects to people's use process. For this reason, we propose a method for predicting deformation during cutting of aviation thin-walled parts. Summary of the invention

[0004] Technical problem to be solved: In view of the shortcomings of the prior art, the present invention provides a method for predicting the deformation of thin-walled aviation parts during cutting. The cutting process model is used to perform 3D simulation of the part cutting process, and the influence of the part material, cutting heat conductivity coefficient, inter-chip friction coefficient and chip separation coefficient on the part processing deformation force is analyzed. Experiments and simulations are carried out in combination with the cutting process model and the part three-dimensional model. The deformation force is analyzed and predicted according to the changes in the part cutting process, which can effectively solve the problems in the background technology.

[0005] Technical solution: To achieve the above purpose, the technical solution adopted by the present invention is: a method for predicting deformation of thin-walled aviation parts during cutting, comprising the following steps: S1: Parts processing: Perform multiple groups of cutting processes on aviation thin-walled parts, and monitor the part material, cutting heat conductivity, inter-chip friction coefficient and chip separation coefficient during each group of parts processing; S2: Parts selection: Inspect the processed parts and select a group of parts with the highest processing accuracy. This group of parts ensures little or no deformation; S3: Establishing cutting process model: Establishing cutting process model of selected parts according to part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient, and using this model to perform three-dimensional simulation on high-speed cutting process of aviation thin-walled parts; S4: Establishment of three-dimensional model of parts: Perform three-dimensional inspection on the outer surface of the processed parts, and establish a three-dimensional model of qualified parts based on the appearance, size and stress of the parts; S5: Part model comparison: Compare the three-dimensional models of each processed part, and use the selected three-dimensional model of the part as a reference to calculate the deformation force of each part, determine the qualified standard of the deformation force, and calculate the qualified rate of part deformation; S6: Part processing simulation: 3D simulation of part cutting is performed through the cutting process model, and the influence of part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient on part processing deformation force is analyzed; S7: Prediction and analysis: Combine the cutting process model with the three-dimensional model of the part to conduct experiments and simulations, and analyze and predict the deformation force according to the cutting processing changes of the part.

[0006] As a preferred technical solution of the present application, in the step S1, a part material monitoring system, a cutting heat conduction temperature monitoring system, an inter-chip friction coefficient simulation analysis system and a chip separation and weighing system are set up.

[0007] As a preferred technical solution of the present application, the part material monitoring system includes a part hardness detection module, a part toughness detection module, a part deformation force detection module, a central management module, a display module and an integrated analysis module. The part hardness detection module, the part toughness detection module and the part deformation force detection module analyze and establish a model for the detection data through the central management module.

[0008] As a preferred technical solution of the present application, the cutting heat conduction temperature monitoring system includes a cutting temperature detection module, a cutting speed detection module, a communication module, a PLC management module, a temperature display module and a cutting speed control module. The cutting temperature detection module and the cutting speed detection module transmit data to the PLC management module through the communication module, and control the cutting speed and temperature through the cutting speed control module.

[0009] As a preferred technical solution of the present application, the inter-chip friction coefficient simulation analysis system simulates and analyzes the cutting process through finite element software, and establishes a simulation model by combining feed rate, cutting speed, and back cutting depth.

[0010] As a preferred technical solution of the present application, the chip separation and weighing system includes a chip weighing detection module, a data transmission module, a data management module, a weight display module and a weighing control module. The chip weighing detection module is connected to the data management module through the data transmission module, and the data management module is connected to the weight display module and the weighing control module.

[0011] As a preferred technical solution of the present application, in the steps S3 and S4, a cutting process model and a three-dimensional model of the part are established respectively, and the two sets of models are combined to analyze and predict the impact of cutting processing changes on deformation force of the part.

[0012] As a preferred technical solution of the present application, the steps S1-S3 perform simulation analysis on part processing according to part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient.

[0013] Beneficial effects: Compared with the prior art, the present invention provides a method for predicting the deformation of thin-walled aviation parts during cutting, which has the following beneficial effects: This method for predicting the deformation of thin-walled aviation parts during cutting performs 3D simulation of part cutting through a cutting process model, and analyzes the influence of part material, cutting heat conductivity coefficient, inter-chip friction coefficient and chip separation coefficient on part processing deformation force, combines the cutting process model with the part three-dimensional model to conduct experiments and simulations, and analyzes and predicts the deformation force according to the cutting changes of the parts. The entire method for predicting the deformation of thin-walled aviation parts during cutting has a simple structure, is easy to operate, and has better effect than traditional methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic diagram of the overall process of a method for predicting deformation during cutting of aviation thin-walled parts.

[0015] Figure 2 The present invention is a schematic diagram of a simplified process of a method for predicting deformation during cutting of aviation thin-walled parts. DETAILED DESCRIPTION

[0016] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0017] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figure 1 , 2 As shown, a method for predicting deformation of thin-walled aviation parts during cutting includes the following steps: S1: Parts processing: Perform multiple groups of cutting processes on aviation thin-walled parts, and monitor the part material, cutting heat conductivity, inter-chip friction coefficient and chip separation coefficient during each group of parts processing; S2: Parts selection: Inspect the processed parts and select a group of parts with the highest processing accuracy. This group of parts ensures little or no deformation; S3: Establishing cutting process model: Establishing cutting process model of selected parts according to part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient, and using this model to perform three-dimensional simulation on high-speed cutting process of aviation thin-walled parts; S4: Establishment of three-dimensional model of parts: Perform three-dimensional inspection on the outer surface of the processed parts, and establish a three-dimensional model of qualified parts based on the appearance, size and stress of the parts; S5: Part model comparison: Compare the three-dimensional models of each processed part, and use the selected three-dimensional model of the part as a reference to calculate the deformation force of each part, determine the qualified standard of the deformation force, and calculate the qualified rate of part deformation; S6: Part processing simulation: 3D simulation of part cutting is performed through the cutting process model, and the influence of part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient on part processing deformation force is analyzed; S7: Prediction and analysis: Combine the cutting process model with the three-dimensional model of the part to conduct experiments and simulations, and analyze and predict the deformation force according to the cutting processing changes of the part.

[0020] Furthermore, in step S1, a part material monitoring system, a cutting heat conduction temperature monitoring system, an inter-chip friction coefficient simulation analysis system, and a chip separation weighing system are set up.

[0021] Furthermore, the part material monitoring system includes a part hardness detection module, a part toughness detection module, a part deformation force detection module, a central management module, a display module and an integrated analysis module. The part hardness detection module, the part toughness detection module and the part deformation force detection module analyze and establish a model for the detection data through the central management module.

[0022] Furthermore, the cutting heat conduction temperature monitoring system includes a cutting temperature detection module, a cutting speed detection module, a communication module, a PLC management module, a temperature display module and a cutting speed control module. The cutting temperature detection module and the cutting speed detection module transmit data to the PLC management module through the communication module, and control the cutting speed and temperature through the cutting speed control module.

[0023] Furthermore, the inter-chip friction coefficient simulation analysis system simulates and analyzes the cutting process through finite element software, and establishes a simulation model by combining feed rate, cutting speed, and back cutting depth.

[0024] Furthermore, the chip separation and weighing system includes a chip weighing detection module, a data transmission module, a data management module, a weight display module and a weighing control module. The chip weighing detection module is connected to the data management module through the data transmission module, and the data management module is connected to the weight display module and the weighing control module.

[0025] Furthermore, in steps S3 and S4, a cutting process model and a part three-dimensional model are established respectively, and the two sets of models are combined to analyze and predict the influence of the cutting process changes of the part on the deformation force.

[0026] Furthermore, steps S1-S3 simulate and analyze the part processing according to the part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient. Example

[0027] Parts processing: multiple groups of cutting processes are performed on aviation thin-walled parts, and the part material, cutting heat conductivity coefficient, inter-chip friction coefficient and chip separation coefficient are monitored during each group of parts processing. The part material is high-strength aluminum alloy, the cutting speed is 2200r / min, the cutting temperature is 1000℃, the inter-chip friction coefficient is 0.2μ, and the chip separation coefficient is 50g; S2: Parts selection: Inspect the processed parts and select a group of parts with the highest processing accuracy. This group of parts ensures little or no deformation; S3: Establishing cutting process model: Establishing cutting process model of selected parts according to part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient, and using this model to perform three-dimensional simulation on high-speed cutting process of aviation thin-walled parts; S4: Establishment of three-dimensional model of parts: The outer surface of the processed parts is subjected to three-dimensional inspection, and a three-dimensional model of qualified parts is established according to the appearance, size and stress of the parts. The parts are rectangular aluminum alloy sheets with a length and width of 1000mm and 700mm respectively, and a thickness of 30mm; S5: Part model comparison: Compare the three-dimensional models of each processed part, and use the selected three-dimensional model of the part as a reference to calculate the deformation force of each part, determine the qualified standard of the deformation force, and calculate the qualified rate of part deformation; S6: Part processing simulation: 3D simulation of part cutting is performed through the cutting process model, and the influence of part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient on part processing deformation force is analyzed; S7: Prediction and analysis: Combine the cutting process model with the three-dimensional model of the part to conduct experiments and simulations, and analyze and predict the deformation force according to the cutting processing changes of the part.

[0028] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A method for predicting deformation of thin-walled aviation parts during cutting, characterized in that: The steps include: S1: Parts processing: Perform multiple groups of cutting processes on aviation thin-walled parts, and monitor the part material, cutting heat conductivity, inter-chip friction coefficient and chip separation coefficient during each group of parts processing; S2: Parts selection: Inspect the processed parts and select a group of parts with the highest processing accuracy. This group of parts ensures little or no deformation; S3: Establishing cutting process model: Establishing cutting process model of selected parts according to part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient, and using this model to perform three-dimensional simulation on high-speed cutting process of aviation thin-walled parts; S4: Establishment of three-dimensional model of parts: Perform three-dimensional inspection on the outer surface of the processed parts, and establish a three-dimensional model of qualified parts based on the appearance, size and stress of the parts; S5: Part model comparison: Compare the three-dimensional models of each processed part, and use the selected three-dimensional model of the part as a reference to calculate the deformation force of each part, determine the qualified standard of the deformation force, and calculate the qualified rate of part deformation; S6: Part processing simulation: 3D simulation of part cutting is performed through the cutting process model, and the influence of part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient on part processing deformation force is analyzed; S7: Prediction and analysis: Combine the cutting process model with the three-dimensional model of the part to conduct experiments and simulations, and analyze and predict the deformation force according to the cutting processing changes of the part.

2. The method for predicting deformation of thin-walled aviation parts during cutting according to claim 1, characterized in that: In the step S1, a part material monitoring system, a cutting heat conduction temperature monitoring system, an inter-chip friction coefficient simulation analysis system, and a chip separation and weighing system are set up.

3. The method for predicting deformation of thin-walled aviation parts during cutting according to claim 2, characterized in that: The part material monitoring system includes a part hardness detection module, a part toughness detection module, a part deformation force detection module, a central management module, a display module and an integrated analysis module. The part hardness detection module, the part toughness detection module and the part deformation force detection module analyze and establish a model for the detection data through the central management module.

4. The method for predicting deformation of thin-walled aviation parts during cutting according to claim 2, characterized in that: The cutting heat conduction temperature monitoring system includes a cutting temperature detection module, a cutting speed detection module, a communication module, a PLC management module, a temperature display module and a cutting speed control module. The cutting temperature detection module and the cutting speed detection module transmit data to the PLC management module through the communication module, and control the cutting speed and temperature through the cutting speed control module.

5. The method for predicting deformation of thin-walled aviation parts during cutting according to claim 2, characterized in that: The inter-chip friction coefficient simulation analysis system simulates and analyzes the cutting process through finite element software, and establishes a simulation model by combining feed rate, cutting speed, and back cutting depth.

6. The method for predicting deformation of thin-walled aviation parts during cutting according to claim 2, characterized in that: The chip separation and weighing system includes a chip weighing detection module, a data transmission module, a data management module, a weight display module and a weighing control module. The chip weighing detection module is connected to the data management module via the data transmission module, and the data management module is connected to the weight display module and the weighing control module.

7. The method for predicting deformation of thin-walled aviation parts during cutting according to claim 1, characterized in that: In the steps S3 and S4, a cutting process model and a three-dimensional model of the part are established respectively, and the two sets of models are combined to analyze and predict the influence of the cutting process changes of the part on the deformation force.

8. The method for predicting deformation of thin-walled aviation parts during cutting according to claim 1, characterized in that: The steps S1-S3 perform simulation analysis on part processing according to part material, cutting heat conduction coefficient, inter-chip friction coefficient and chip separation coefficient.

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