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Simulation technology-based method for optimizing cutting parameters of ceramic cutting tool

A technology of ceramic tools and cutting parameters, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effect of improving processing quality, prolonging service life and reducing processing costs

Inactive Publication Date: 2013-01-30
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the early cutting simulations used Lagrange and Eulerian algorithms, and today ALE and SPH algorithms are mostly used, but they are limited to the establishment of stress field and temperature field simulation analysis of metal tools

Method used

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  • Simulation technology-based method for optimizing cutting parameters of ceramic cutting tool
  • Simulation technology-based method for optimizing cutting parameters of ceramic cutting tool
  • Simulation technology-based method for optimizing cutting parameters of ceramic cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Select the workpiece material 45# hardened steel, the determined Johnson-Cook rheological model parameters (see Table 1), and physical parameters (see Table 2). Tool material is Al 2 o 3 / ZrO 2 (Y 2 o 3 ) Composite ceramic materials, passed the physical parameters of the test (see Table 3).

[0046] Table 1 Johnson-Cook model parameters of 45# hardened steel

[0047]

[0048] Table 2 Physical parameters of 45# hardened steel

[0049]

[0050] Table 3 Al 2 o 3 / ZrO 2 (Y 2 o 3 ) Physical parameters of composite materials

[0051]

[0052] The rheological equation that is substituted into the calculation results of the above parameters is:

[0053]

Embodiment 2

[0055] When the cutting speed of the actual test is 140m / min, the feed rate is 0.1mm / r, 0.2 mm / r, 0.3 mm / r, 0.4 mm / r, 0.5 mm / r, and five feed conditions are simulated The local steady-state temperature gradient curve of the lower blade (see Figure 1 (a); (b); (c); (d); (e)), it can be seen from Figure 1 that the high-temperature intensive area is mainly distributed on the rake face. Figure 2(a) and (b) represent the temperature curves of the front and flank surfaces respectively. From Figure 2, it can be seen that different feed rates have a significant impact on the temperature fields of the front and flank surfaces. When the feed rate is 0.1-0.4mm / r, the temperature of the front and flank surfaces near the tool tip is concentrated below 600°C. the

[0056] Figure 3 (a); (b); (c); (d); (e) is the steady state stress curve, from Figure 3 we can see that the maximum stress is concentrated at the tip of the tool, the maximum compressive stress is 1700MPa, Figure 4 (a) and (b) ...

Embodiment 3

[0059] According to the test cutting speed, the feed rate is selected as 0.1mm / r, and the cutting speed is 140m / min, 190m / min, 240m / min, 290m / min to obtain the steady-state temperature field distribution of the tool in four cases (Fig. 5(a) ; (b); (c); (d)), it can be seen from Figure 5 that the high temperature intensive area is mainly distributed on the rake face. Figure 6(a) and (b) show the temperature change curves at the front and back of the tool tip respectively. It can be seen from Figure 6 that when the cutting speed is 140m / min and 190m / min, the maximum temperature is less than 800°C, and at other cutting speeds The tip temperature is above 1000°C. From the analysis of Example 2, it can be seen that when the speed does not exceed 190m / min, the temperature of the front and flank surfaces near the tool tip is concentrated below 800°C, which belongs to the low-temperature processing zone.

[0060] Figure 7(a); (b); (c); (d) shows the steady-state stress gradient curve...

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Abstract

The invention discloses a simulation technology-based method for optimizing cutting parameters of a ceramic cutting tool, and relates to the cutting methods, wherein the rheological data and the physical parameters of a workpiece and the tool physical parameters are obtained by experiment and calculation, and a finite element software is used for successively using transient state and steady state simulations to obtain the temperature field and the stress field of the ceramic cutting tool. By analyzing the temperature filed distribution and the stress field distribution of a cutting edge under different cutting conditions, the optimal cutting parameters are determined. According to the method provided by the invention, transient state and steady state are combined, the data is accurate, and corresponding important cutting parameters (cutting speed v, feeding rate f and cutting depth alpha P) for finish machining, semi-finishing and rough machining of different workpiece materials are determined for reasonably using the ceramic cutting tool and prolonging the service life of the ceramic cutting tool. The method plays an important role in the aspects of satisfying the cutting conditions, prolonging the service life of the ceramic cutting tool, improving the machining quality and reducing the machining cost.

Description

technical field [0001] The invention relates to a cutting processing method, in particular to a method for optimizing cutting parameters of a ceramic tool by using simulation technology, and the method predicts the cutting parameters and service life of the optimized ceramic tool. Background technique [0002] The excellent mechanical properties and high temperature performance of ceramic cutting tools enable green cutting of materials such as turning and milling cast iron and hardened steel. Ceramic tool materials have excellent characteristics, and their application to the field of CNC cutting has important practical significance. The important problem to be solved in the selection of ceramic cutting tools in cutting processing is how to reduce the wear of the cutting edge to improve the service life and achieve high-precision and high-quality processing surfaces. Research shows that ceramic tool wear will not only reduce the quality of the cutting surface but also greatl...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 马伟民陈响马雷李权张倩赵翔
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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