工程科學學報

Flatness Control in New Generation High-tech Mills for Wide Strip Rolling

Chen Xianlin

1997, 19(S1): 1-5. doi: 10.13374/j.issn1001-053x.1997.s1.001

[Abstract](304) [PDF 454KB](13)

Abstract:
The area of roll gap adjustment and its characteristics of stiffness are investigated in a C_Q－C_H－q space. Parameters for evaluating the capabilities of the roll gap control are defined.

Finite Element Analysis of Casing Threads under Tensile Load

Zang Yong

1997, 19(S1): 6-8,17. doi: 10.13374/j.issn1001-053x.1997.s1.002

[Abstract](319) [PDF 353KB](8)

Abstract:
This paper discusses the mechanical behavior of the API 8 Round casing connection under tensile load by the FEM, the regular pattern of stresses/strain distribution along pin/box has been given.

Research on 3-D Multi-body Contact Problem with Friction by BEM and Its Application

He Yamei, Liu Chongde

1997, 19(S1): 9-12. doi: 10.13374/j.issn1001-053x.1997.s1.003

[Abstract](292) [PDF 357KB](7)

Abstract:
Based on the fundamental boundary integral equation, the boundary integral equation of five-body contact with friction is derived. During the iterative process of solving contact problem, the method of condensation is applied. Contact problem composed of different materials is analysed and the better result is gotten.

Flow Stress of Red Copper at Hot Deformation

Guan Kezhi, Fan Bailin, Zhou Jihua

1997, 19(S1): 13-17. doi: 10.13374/j.issn1001-053x.1997.s1.004

[Abstract](304) [PDF 389KB](9)

Abstract:
This paper mainly studies the mathematical models for flow stress of red copper by doing experiment with a cam plastometer at a constant deforming rate. The paper provides many flow stress diagrams concerning red copper under different strain temperatures,different strain rates and different deformation degrees. At the same time, on the foundation of analyzing and comparing the regression results of nonlinear models, mathematical models of high accuracy for flow stress was put forward.

Connector Stress Analysis of 8-round Thread Casing

Wang Li, Zang Yong, Zou Jiaxiang

1997, 19(S1): 18-21. doi: 10.13374/j.issn1001-053x.1997.s1.005

[Abstract](280) [PDF 357KB](8)

Abstract:
The formula of connector stresses in different conditions based on elastic mechanics theory is presented,and the computer simulation is made.The results are comparable with those of experiment done abroad. Therefore this software can be applied to analyzed casing mechanical property in practice.

Load lest of Giant Steel-transport Vehicle and Assessment of Accident

Cheng Wei, Zhang Bo, Wang Longshou, Chen Ping

1997, 19(S1): 22-25. doi: 10.13374/j.issn1001-053x.1997.s1.006

[Abstract](300) [PDF 343KB](8)

Abstract:
The load test and the structure calculation of the shaft in the case of broken-down accident are introduced. The design principle and the basis of the accident assessment are proposed.

High Rigidity Mill Stand for Quick Changing Roll and Guide

Bian Zhirui, Li Weicheng

1997, 19(S1): 26-28. doi: 10.13374/j.issn1001-053x.1997.s1.007

[Abstract](254) [PDF 263KB](9)

Abstract:
A high rigidity mill stand in which the roll can be quickly changed together with guide as been proposed. This type of stand is suitable for bar, wire and section steel rolling. A device named "CASSETE" is mountal on the mill housing. The roll and guide can be premounted in the cassete, and adjusted off line. With the cassete, the roll and guide can be hoisted and mounted at the same time.

Research on Adaptive Control of Cross Wedge Rolling's Imitation Hydraulic Srewdown System

Xiang Shuchun, Xiao Zhiquan

1997, 19(S1): 29-32. doi: 10.13374/j.issn1001-053x.1997.s1.008

[Abstract](271) [PDF 339KB](6)

Abstract:
Hydraulic screwdown roll gap regulating device is used on cross wedge mill.Based on the Popov-Landau's ultra-stability thorem, a kind of electrohydraulic servo model reference adaptive control system is introduced. The paper gives the algorithm, design method, theoretical analysis and digital simulation results,which shows that this controlled system has good static and dynamic characteristic.The simulation results of the MRAC system proposed here also show good following and anti-interference ability.The form of the controller is easier for field use.

Database Interface of Metallic Plastic Deformation Resistance

Cheng Wei, Han Liqi

1997, 19(S1): 33-35. doi: 10.13374/j.issn1001-053x.1997.s1.009

[Abstract](320) [PDF 305KB](8)

Abstract:
There are two main features in the database interface software of metallic plastic deformation resistance;one is directly using the FOXBASE database file as the date bufffer;the other is using C to call the FOXBASE database file.

Development and Application of the Intelligen Decision Supporting System of Spare Parts Management

Gao Fujia, Wu Jigeng, Yu Zehai, Wang Junwen

1997, 19(S1): 36-38,43. doi: 10.13374/j.issn1001-053x.1997.s1.010

[Abstract](280) [PDF 371KB](6)

Abstract:
A designing method which is a bolicy-maker oriented inetllignet decision supporting system of spare parts management is put forword.The working step and the model system are settled in its basic form.

Plasto-elastic Analysis on Stress Fields of Hydraulic Screwdown Cylinder and Its Optimal Design

Feng Ailan, Liu Jianping

1997, 19(S1): 39-43. doi: 10.13374/j.issn1001-053x.1997.s1.011

[Abstract](282) [PDF 416KB](6)

Abstract:
A practical mechanical model for a hydraulic cylinder is put forword. By the aid of plasto-elastic theory, the stress analysis is carried out.The complex method is adopted to optimize design parameters of the cylinder. Tests gave satisfactory results.

Force-Power Parameters Selection of BF Tap Hole Machine

Yin Zhongjun, Liu Jianping, Zhu Yunyan

1997, 19(S1): 44-47. doi: 10.13374/j.issn1001-053x.1997.s1.012

[Abstract](253) [PDF 315KB](6)

Abstract:
This paper put forwards a method of force power parameters of tap hole machine by aid of theoretical analysis and experimental research.

Analysis of Injecting System of Converter Hot-shooting

Ju Yichun, Zhu Yunyan

1997, 19(S1): 48-51. doi: 10.13374/j.issn1001-053x.1997.s1.013

[Abstract](281) [PDF 380KB](7)

Abstract:
This paper discusses the application and development of the technology of converter hot-shooting. Based on the studying of converter hot shooting at Baoshan Iron & Steel General Works, the mechanical structure and technical specification of the injecting system of hot-shooter are analyzed. The calculating method of parameters and approaches of designing are discussed.

Rolling Aluminium Foil Control Technology with High Speed and Creat Accuracy

Liu Shengming, Li Mouwei, Tong Chaonan, Mu Zhichun, Xu Feng

1997, 19(S1): 52-56. doi: 10.13374/j.issn1001-053x.1997.s1.014

[Abstract](281) [PDF 446KB](6)

Abstract:
The rolling parameters on expert experience and second optimal predetemination of SCC, optimal control of SCC and system control of tension sensor are predetermined by the main technology that consists of computer system structure of SCC and DDC,garge control tactics and Tention AGC Fuzzy control of DDC.

Cusp Catastrophe Model for Metal Fatigue Fracture

Fan Shiqing, Xie Liyang

1997, 19(S1): 57-60. doi: 10.13374/j.issn1001-053x.1997.s1.015

[Abstract](327) [PDF 377KB](9)

Abstract:
Based on the opinion that there is catastrophe phenomenon in fatigue fracture, the Whole loading system, including the test sample and the test machine, is studied.A cusp catastrophe model is presented, and the condition of the happening of the cusp catastrophe in metal fatigue fracture is obatined through theoretical analysis.

Vibration Analysis of 2030 Cold Continuous Mill

Sun Zhihui, Zou Jiaxiang, He Ruying, Yue Hailong

1997, 19(S1): 61-64. doi: 10.13374/j.issn1001-053x.1997.s1.016

[Abstract](264) [PDF 381KB](5)

Abstract:
The vibration feature and Main effect of 2030 cold continuous mill are acquired by live comprehensive measure. The causes of the vibration are analysed by the theoretic study and imitative experiment.

Mathermatical Model of Flow Stress about Aluminium Alloy under Cold Condition

Zhang Shaojun, Dai Zongling, Zhou Jihua

1997, 19(S1): 65-68. doi: 10.13374/j.issn1001-053x.1997.s1.017

[Abstract](259) [PDF 344KB](6)

Abstract:
The compression experiment for five aluminium alloys is made by self-made plain strain compress instrument, the flow stress is measured under cold defromation, which effact on flow stress is descussed. The best mathematic model of flow stress is obtained.

Control of Torsional Vibration in Mill Drives

Yan Xiaoqiang, Cheng Wei, Li Shuping

1997, 19(S1): 69-73. doi: 10.13374/j.issn1001-053x.1997.s1.018

[Abstract](261) [PDF 379KB](8)

Abstract:
This paper relate torsional vibration on rolling mills and control methed.

On the Bite of Spiral Flight Rolling Mill

Li Yingqiang, Yang Wenping

1997, 19(S1): 74-76. doi: 10.13374/j.issn1001-053x.1997.s1.019

[Abstract](256) [PDF 276KB](8)

Abstract:
Based on study of the parameters for adjusting the rolling mill and the practical analyzing method the conjugate theory is put forward. Combining the correction of the other effective parameters, it will be important to adjust the paramaters for rolling screw blades.

Technology of Spiral Flight Rolling

Li Yingqiang

1997, 19(S1): 77-79. doi: 10.13374/j.issn1001-053x.1997.s1.020

[Abstract](289) [PDF 322KB](10)

Abstract:
Basis of theoretic analysis and practical experiences,the principle of adjusting and controlling for spiral flight rolling process is considered in this paper.Optimal procedure is put forward for effective adjusting and stable production.

Influence of Axial Force on the Stretch Bending Leveling of Sheet Metal

Xiao Lin, Zou Jiaxiang

1997, 19(S1): 80-83. doi: 10.13374/j.issn1001-053x.1997.s1.021

[Abstract](269) [PDF 331KB](8)

Abstract:
The influence of axial force on the elastic-plastic stretch bending and sprngback of a sheet metal is examined and a method to calculate the strain of middle layer is also given.

Exploration for Continuous Milling Process of Vibration Mill

Yin Zhongjun, Zhu Yunyan

1997, 19(S1): 84-88. doi: 10.13374/j.issn1001-053x.1997.s1.022

[Abstract](280) [PDF 404KB](7)

Abstract:
Measurement and analysis of resident quantity and time of material milled in mill tube are carried out By using orthogonal design method, the influence of operating conditions on product size and output is revealed.

Error Analysis on Plate Spring Mould Oscillating Mechanism

Qin Qin, Tian Yisheng, Zou Jiaxiang, Liu Lianqun

1997, 19(S1): 89-92. doi: 10.13374/j.issn1001-053x.1997.s1.023

[Abstract](260) [PDF 321KB](5)

Abstract:
This paper focuses on the error analysis of the plate springmould oscillating mechanism,the main factors influencing deviation of the mould oscillating mechanism from its normal track are given.

Analysis of Cross with Finite Element

Jing Zhihong, Guan Kezhi, Li Bin, Li Aiqun

1997, 19(S1): 93-96. doi: 10.13374/j.issn1001-053x.1997.s1.024

[Abstract](311) [PDF 377KB](7)

Abstract:
Cross pin type universal spindle of 1 549 mm mill is analyzed with finite element.Distribution law of displacement and stress of cross-pin of the universal spindle are determined. Calculated results of cross-pin are compared under uniform load and triangle distributing load.

Analysis for the Cause of Bending of the Slab Head

Yang Jing, Wu Diping

1997, 19(S1): 97-100. doi: 10.13374/j.issn1001-053x.1997.s1.025

[Abstract](288) [PDF 332KB](4)

Abstract:
The cause of bending of slab head is analysed in rolling process and provides the basis for their control.

Study on Dynamic Characteristics of Oscillation Facillity of Continuous Caster Crystallizer

Liu Hongfei, Li Mouwei, Zhang Shaojun, Wang Zhenwen, Wang Zengming, Zhang Dade, Hu Zebin

1997, 19(S1): 101-103. doi: 10.13374/j.issn1001-053x.1997.s1.026

[Abstract](253) [PDF 291KB](5)

Abstract:
Based on the space dynamic analysis model of a oscillation facillity of continuous caster crystallizer, the lower natural frequencies of the system are obtained, which coincide with the test result.

Determination of Relationship between Stress and Strain and Analysis of Mechanical Property in Rail Straightening

Yang Haibo, Wang Jiacai, Wang Weiping

1997, 19(S1): 104-108. doi: 10.13374/j.issn1001-053x.1997.s1.027

[Abstract](297) [PDF 412KB](6)

Abstract:
It is convenient and exact to analyze the bending property (bending moment, curvature and deflation) with real,complex power function stress and strain relationship in the process of rail's straightening. Through the alternately bending test with the same materiel, stress and strain reationship can be found. The mechanical property problem caused by altemately bending of heavy rail can be solved.This method can be used for other steels with different cross section and material.

Calculation and Analysis of the Thermal Stress Vibrating Screen for Hot Agglomerate Mine

Zhang Ying, Zhu Yunyan

1997, 19(S1): 109-112. doi: 10.13374/j.issn1001-053x.1997.s1.028

[Abstract](246) [PDF 324KB](4)

Abstract:
Based on the practical measurement of thermal field on vibrating screen for hot agglomerate mine at sintering static stress is studied by using computer software SAP5p.The equivalent line of stress is made. The maximum points of stress on the box of screen are found. The result can be used in the design and further research of hot mine screen.

1997 Vol. 19, No. S1