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Mortise broaching process simulation analysis method based on heat-force-flow multi-field coupling

A technology of process simulation and analysis method, which is applied in design optimization/simulation, special data processing applications, instruments, etc. It can solve the problems of insufficient accuracy of simulation results, inability to accurately simulate the cooling and lubrication of workpieces and tools, and achieve the improvement of simulation accuracy Effect

Pending Publication Date: 2021-03-19
CHINA HANGFA SOUTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a simulation analysis method for tongue and groove broaching process based on heat-force-flow multi-field coupling, so as to solve the problem that only a single physical field (mainly mechanical stress field) can be simulated when a single software platform is used for simulation. , cannot accurately simulate the cooling and lubricating effect of the coolant on the workpiece and tool during the broaching process, resulting in the technical problem that the obtained simulation results are not accurate enough

Method used

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  • Mortise broaching process simulation analysis method based on heat-force-flow multi-field coupling
  • Mortise broaching process simulation analysis method based on heat-force-flow multi-field coupling
  • Mortise broaching process simulation analysis method based on heat-force-flow multi-field coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] Example 1: Simulation optimization of broach rake angle

[0150] The material of the broach is M42 quenched + tempered high-speed steel, and the tongue and groove disc is made of GH4169 aging nickel-based superalloy material. The three-dimensional structure of the broach used for broaching is as follows: Figure 12 with Figure 13 shown. The parameters of the tool are: the relief angle is 3°, the radius of the blunt circle of the cutting edge is 0.02mm, the tooth lift is 0.03mm, and the broaching speed is 6m / min. The influence of the rake angle on the temperature distribution of broaching simulation is compared and analyzed. Carry out the broaching simulation of tools with rake angles of 6°, 10°, 15° and 18° respectively.

[0151] Repeat the simulation and tool parameter optimization steps of this embodiment to obtain the blade temperature distribution and broaching force simulation results with different rake angle parameters, such as Figure 14 shown. It can be se...

Embodiment 2

[0154] Embodiment 2: Simulation optimization of blunt circle radius of broach blade

[0155] The material of the broach is ASP2015 powder metallurgy steel quenched + tempered material, and the tenon and groove disc is FGH95 aging nickel-based superalloy material. The three-dimensional structure of the broach used for broaching is as follows: Figure 16 with Figure 17 shown. The parameters of the tool are: the rake angle and the relief angle are 10° and 3° respectively, the broaching speed is 2m / min, the tooth lift is 0.03mm, and the broaching speed is 6m / min. Simulate the effect of temperature distribution. Carry out the broaching simulation of tools with blunt circle radii of 0.01mm, 0.02mm, 0.03mm and 0.04mm respectively.

[0156] Figure 18 It is a comparison chart of the influence of different cutting edge blunt circle radii on cutting stress (Misses Stress). It can be seen from the results that the stress decreases with the increase of the blunt circle radius. When...

Embodiment 3

[0159] Example 3: Simulation optimization of broach tooth lift

[0160] The material of the broach is M42 high-speed steel quenched and tempered, and the tongue and groove disc is made of FGH95 aging nickel-based superalloy material. The three-dimensional structure of the broach used for broaching is as follows: Figure 20 with Figure 21 shown. The rake angle and relief angle of the broach are 10° and 3°, respectively, and the broaching speed is 2m / min. Carry out broaching simulations of tools with tooth lifts of 0.02mm, 0.03mm, 0.04mm and 0.05mm respectively.

[0161] Figure 22 It is the simulation comparison result of the influence of different tooth lifts on the residual stress (X direction). It can be seen from the figure that the distribution area of ​​residual stress gradually increases with the increase of tooth lift.

[0162] Figure 23 It is a schematic diagram of the change of cutting force in the X and Y directions with the tool tooth lift and time. From bot...

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Abstract

The invention discloses a mortise broaching process simulation analysis method based on thermal force flow multi-field coupling. The method comprises the steps of creating a broaching thermal force model according to the sizes of a cutter and a workpiece, material related parameters, cutting related parameters and heat conduction characteristics, and making analog simulation; establishing a broaching heat flow model according to the cooling related parameters of the cutter, the workpiece and the cooling liquid, and performing analog simulation; and coupling the simulation results of the broaching thermal force model and the broaching thermal flow model to obtain a broaching thermal force flow multi-field coupling model, and simulating the cooling effect of the cooling liquid on the workpiece, the cutter and the cuttings in the broaching process. The thermal force and thermal flow simulation analysis model in the broaching process is established, a data transmission platform among the models is established, coupling simulation analysis among three fields of broaching thermal force flow is achieved, the flow speed, temperature and impact pressure of cooling liquid are fully considered, and simulation precision is greatly improved.

Description

technical field [0001] The invention relates to the field of broaching process simulation, in particular to a simulation analysis method for tongue and groove broaching process based on thermal-mechanical-flow multi-field coupling. Background technique [0002] Tenon-tooth-tooth assembly is a commonly used assembly method in turbine engines. It has the characteristics of high dimensional accuracy and is widely used in the field of aviation machinery, such as the precise positioning of blade parts. The wheel disc is one of the core components, and it is subjected to alternating loads of high temperature and high pressure for a long time during operation. The blades are connected to the mortise and tenon of the disc through the tenon and tenon of the blade root. The reliability of the tenon joint structure (tenon and tenon) directly determines the service life of the system. The positioning accuracy of the tenon-tooth structure of the blade directly affects the assembly accur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/15G06F30/17G06F119/08G06F113/08G06F119/14
CPCG06F30/23G06F30/15G06F30/17G06F2119/08G06F2113/08G06F2119/14
Inventor 易林峰吴时盛张玉华曹浪蔡荣宾
Owner CHINA HANGFA SOUTH IND CO LTD
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