Construction Method of Comprehensive Frequency Response Function Equation of Large Pitch Screw Turning Technology System

A technology of frequency response function and process system, which is applied in the construction of comprehensive frequency response function equation of large-pitch screw turning process system and the construction of comprehensive frequency response function of cutting system, which can solve the problem of affecting the service life of the tool system, complex vibration characteristics, and inability to reflect the process. System Dynamics Behavior etc.

Active Publication Date: 2019-05-10
HARBIN UNIV OF SCI & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long stroke and multi-directional cross-feed turning during the machining process, the vibration characteristics are complex and changeable, which greatly affects the machining accuracy and roughness of the large-pitch screw, and at the same time affects the service life of the tool system.
[0003] At present, most of the research on vibration in the cutting process takes machine tools, tools, workpieces, spindle-toolholder-tools, tool-workpieces or machine tool-workpieces as the research objects, and establishes corresponding vibration equations and dynamic models, but none of these models Considering the comprehensive influence of the machine tool, tool and workpiece on the dynamic characteristics of the machining system, it cannot reflect the dynamic behavior of the entire process system
[0004] In view of the fact that high-feed cutting technology and existing equation establishment methods cannot reflect the status quo of the dynamic behavior of the entire machining system

Method used

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  • Construction Method of Comprehensive Frequency Response Function Equation of Large Pitch Screw Turning Technology System
  • Construction Method of Comprehensive Frequency Response Function Equation of Large Pitch Screw Turning Technology System
  • Construction Method of Comprehensive Frequency Response Function Equation of Large Pitch Screw Turning Technology System

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Embodiment Construction

[0078] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0079] See Figure 1-5 , the present invention is based on the generalized dynamic space large-pitch screw turning system comprehensive frequency response function construction method, specifically comprising the following steps:

[0080] Step 1. Construct the tool-machine tool feed system subsystem frequency response function model

[0081] First, the tool-machine tool feed system subsystem is simplified into screw, nut, guide rail, workbench, tool holder-part tool and tool overhang; based on the theory of response coupling method, the tool-machine tool feed system subsystem It is divided into three substructures: Ⅰ (screw), Ⅱ (nut-table-tool holder-part of the tool) and Ⅲ (tool overhang part), and consider the following four combinations o...

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Abstract

The invention relates to a large-pitch screw turning process system comprehensive frequency response function equation construction method. The method comprises steps: a tool-machine feed system subsystem frequency response function model is constructed; 2, a workpiece-machine spindle subsystem frequency response function model is constructed; 3, through linear superposition of the tool-machine feed system subsystem frequency response function and the workpiece-machine spindle subsystem frequency response function in a corresponding direction, a large-pitch screw turning process system comprehensive frequency response function equation is constructed. In consideration of influences on dynamic characteristics of the processing system by the machine, the tool and the workpiece comprehensively, a concept of generalized dynamic space is put forward, the space scale of the dynamic study is expanded, and based on the generalized dynamic space large-pitch screw turning process system comprehensive frequency response function equation construction method, the vibration characteristics of the turning system can be characterized more accurately, and the dynamic behaviors of the whole process system are reflected.

Description

technical field [0001] The invention relates to a method for constructing a comprehensive frequency response function of a cutting system, in particular to a method for constructing a comprehensive frequency response function equation of a large-pitch screw turning process system, belonging to the technical field of screw turning. Background technique [0002] As the main component of large presses, large-pitch screw plays a key role in the manufacturing and forging of key components in nuclear power, aerospace and large ships. The large-pitch screw has the processing characteristics of long thread processing size, large radial depth of cut and high feed speed. During the turning process, the processing method of low speed and layered cutting is adopted. Due to the long stroke and multi-directional cross-feed turning in the machining process, the vibration characteristics are complex and changeable, which has a great impact on the machining accuracy and roughness of the larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 李哲付祥夫姜彬李超陈帅任德阔王秀瑞李军委
Owner HARBIN UNIV OF SCI & TECH
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