工程科學學報

Study on On-Line Measurement of Forward and Backward Slippage of Plate and Strip during Rolling

Chen Gong, Li Mouwei, Xing Hong, Zhao Liangmo

1994, 16(S2): 1-5. doi: 10.13374/j.issn1001-053x.1994.s2.001

[Abstract](286) [PDF 412KB](6)

Abstract:
In this paper, a measurement system, including a measuring instruments and a data acquisition and processing unit has been proposed. This system has been used practically and the satisfactory results have been obtained.

Structure Vibration of Hydraulic AGC System Capsule

Li Mouwei, Fletcher J D

1994, 16(S2): 6-9. doi: 10.13374/j.issn1001-053x.1994.s2.002

[Abstract](306) [PDF 334KB](6)

Abstract:
For solid and fluid system structure vibration natural frequency and its mode shopes of hydraulic AGC system capsule, a theoretic analysis and calculation with finite element method have been done.

Testing Research on Shear Resistance

Li Mouwei, Zhang Shaojun, Shi Xiaolu, Ye Guohua, Zheng Rijiang, Yang Xiaodong

1994, 16(S2): 10-13,18. doi: 10.13374/j.issn1001-053x.1994.s2.003

[Abstract](252) [PDF 443KB](5)

Abstract:
Based on accurate experimental data, the basic factors and rules influencingshear resistance are analysed.

Analysis of Large Tie Rod with Finite Element Method

Zhang Shaojun, Li Mouwei

1994, 16(S2): 14-18. doi: 10.13374/j.issn1001-053x.1994.s2.004

[Abstract](284) [PDF 406KB](6)

Abstract:
Distributive patterns of the stress and deformation For the large tie rod of the 1000t floating axle shear have been studied, with the contact load being even distribued and being distributed to lodder-type on the thickness of the holes at the both ends of the tie rod by the space substance elements with 20 joints.

Effect of Residual Strain Rate between Two Passes on Flow Stress during Hot Processing

Guan Kezhi, Zhou Jihua, Lun Yixin

1994, 16(S2): 19-22. doi: 10.13374/j.issn1001-053x.1994.s2.006

[Abstract](247) [PDF 354KB](6)

Abstract:
Using cam-type compression testing maching of the constant strain rate, interval between two passes affecting regular on flow stress and soften rate For steel GCr15 and 16MnNb is studied when hot precessing.

Mathematical Model of Laminar Cooling of Hot Rolling Process

Guan Kezhi, Zhao Haishi, Liu Ping

1994, 16(S2): 23-27. doi: 10.13374/j.issn1001-053x.1994.s2.005

[Abstract](284) [PDF 420KB](11)

Abstract:
Using on-Line data of 1700mm hot-rolling Plant of Wuhan Iron & Steel Corp. and theoritical analysis, it is obtained that heat transfer coeffient is the key to the subject. After comparisions of seven different models, the Precisest model of heat transfer coefficient is proposed. On the basis of this model, a general program which can stimulate the laminar cooling process of Wuhan Iron & Steel Corporation is compiled, and higher precision is achieved.

Key Step of Development of Management Information System—The Establishment of Object System Standard System Code System

Wang Shengjuan

1994, 16(S2): 28-32. doi: 10.13374/j.issn1001-053x.1994.s2.007

[Abstract](253) [PDF 447KB](7)

Abstract:
Based on the experience of author, it is mentioned that several items must be solved. This paper emphatically illustrates the establishment of complete Object system, Stand and system and Code system from the system point of view.

Investigation on Parameters in Asymmetrical Rolling Process

Zang Yong, Sun Hao

1994, 16(S2): 33-38. doi: 10.13374/j.issn1001-053x.1994.s2.008

[Abstract](284) [PDF 482KB](6)

Abstract:
In this paper, an upper bound solution model For asymmetrical rolling and the relationships between its parameters are presented. Based on this model, the parameters in asymmetrical rolling process such as the curuation of sheet and the distribution of reduction can be discussed with the minimization of the deformation power. The curling of sheet due to roll speed mismatch has been calculated, the agreement in results with experiments and finite element method demonstrated the efficiency of the method presented in this paper in investigating the parameters in asymmetrical rolling process.

Fault Fuzzy Diagnose Expert System

Sun Minsheng, Chen Jiping

1994, 16(S2): 39-41. doi: 10.13374/j.issn1001-053x.1994.s2.009

[Abstract](287) [PDF 292KB](8)

Abstract:
The paper is about a Fault Fuzzy Diagnose Expert System. FFDES is composed by Four basic module. These are:knowledge base, fault diagnose, interpretation of diagnose and list print. This system bases on thoery of Fuzzy convert in Fuzzy Mathematics. Through example test, its result of diagnosis is satisfied.

Mean Pure Deformation Resistance Model

Yan Xiaoqiang, Zou Jiaxiang

1994, 16(S2): 42-45. doi: 10.13374/j.issn1001-053x.1994.s2.010

[Abstract](226) [PDF 293KB](6)

Abstract:
A method is provided, with which the mean pure deformation resistance is calculated by means of the specific pure deformation energy.

Study of Profile Control on HCW Mill

Liu Li, Yue Hailong, Zou Jiaxiang

1994, 16(S2): 46-50,56. doi: 10.13374/j.issn1001-053x.1994.s2.011

[Abstract](305) [PDF 536KB](7)

Abstract:
This paper discusses the change law of roll gap due to the change of roll crow, bending force and roll shifting.

The Interference Conditions between the Rolls of Three-Roll Planetary Mill

Li Yingqiang

1994, 16(S2): 51-56. doi: 10.13374/j.issn1001-053x.1994.s2.012

[Abstract](271) [PDF 520KB](6)

Abstract:
A method is put forward based on the theory of conjugate surface of reverlution for this purpose. The result is acurate and pratical. Depending on it the rolls designing diameter can be increased by 15~20 percent.

Simulation and Analysis of Chatter Phenomenon on Cold Mill Rolling Wide Strip

Wang Zhangsong, Sun Minsheng, Yuan Xi

1994, 16(S2): 57-60,66. doi: 10.13374/j.issn1001-053x.1994.s2.013

[Abstract](292) [PDF 428KB](8)

Abstract:
In this paper, the reason and regularity of the chatter phenomenon on a cold mill is revealed with the aid of simulation. A point that reasonably increasing friction coefficient can effectively eliminated the Chatter is given.

A Calculating Method of Withdrawal Resistance of Slab Continuous Caster

Yu Gangqiang, Pan Yuchun

1994, 16(S2): 61-66. doi: 10.13374/j.issn1001-053x.1994.s2.014

[Abstract](276) [PDF 518KB](6)

Abstract:
The calculating method of withdrawal resistance of slab continuous caster is proposed. Based on the creep properties of steel at continuous casting temperature and the plate theory, the withdrawal resistance caused by leveling slab bulging is discussed.

The Intelligent CAD for the Plugging Device of Blast Furnace Mud Gun

Bian Zhirui

1994, 16(S2): 67-69,74. doi: 10.13374/j.issn1001-053x.1994.s2.015

[Abstract](277) [PDF 374KB](5)

Abstract:
An intelligent CAD system for an mechanical equipment is addressed in this paper. According to the differences of various design steps, some methods are adopted in this system, such as intelligent reasoning engine, analogical design, normal design and optimized design for equipment parts.

The Application of CAD Technique to the Preceding Dispose of FEA

Chen Dahong, Wang Ge, Zou Jiaxiang

1994, 16(S2): 70-74. doi: 10.13374/j.issn1001-053x.1994.s2.016

[Abstract](265) [PDF 439KB](6)

Abstract:
The element division of three dimension object is studied by employing of CAD technique in this paper. The research aims at the juncture line which is difficult to deal with.A set of reasonable method is summarized. The exact and quick way of element division is supplied for three dimension complex object in engineering structure which has sensitive parts of stress varity.

Study on Vibration of Damped Linear Systems with Multiple Eigenvalues

Huang Hanzhou, Lin He

1994, 16(S2): 75-80,85. doi: 10.13374/j.issn1001-053x.1994.s2.017

[Abstract](278) [PDF 583KB](5)

Abstract:
In this paper, the transfer function method in complex modal theory has been studied.The transfer function matrix and its residual matrices of a damped linear system are introduced. The expansion formula of the transfer function matrix is derived and proved, with which the real expressions are developed for vibration response of a damped linear system with multiple degrees of freedom. The expressions presented in the paper can be used to compute the vibration response of a damped linear system in which one or more multiple eigenvalues may exist, so the problem dealing with multiple eigenvalues is solved about the solution of the vibration response of a damped linear system. Finally one example is shown.

Measurement and Calculation of Transversal Internal Stress Distribution in the Off-line Cold Rolled Strip

Zhang Qingdong, Chen Xianlin, Wang Zhangsong, Yang Quan

1994, 16(S2): 81-85. doi: 10.13374/j.issn1001-053x.1994.s2.018

[Abstract](247) [PDF 419KB](6)

Abstract:
The transversal internal stress distribution in the off-line cold rolled strips sampled for a 1700mm cold tandem mill was measured by the modified hole-drilling technique. Based on the conclusions drawn from the experiment, an available method for calculation of the internal stress distribution was established, which can give fairly identical solution with the test. This numerical method for transversal internal stress calculation can be used in the on-line automatic flatness control.

Upper-Bound Solution of Metal forming Problem with the Flow Function Velocity Model

Yang Haibo, Wang Jiacai, Liu Guangtao

1994, 16(S2): 86-91. doi: 10.13374/j.issn1001-053x.1994.s2.019

[Abstract](255) [PDF 467KB](6)

Abstract:
The complete velocity model for plastic metal is structured with flow function.The boundary tear stress condition, which should be met by the velocity field of the Mises material plan or axisymmetrical deformation, is raised. The stress field corresponding the velocity could be obtained by the resolution of one point uniform stress and the answer for tube drawing process is ascertained with this sort of theorem.

Study on Dynamic Characteristics of Circular Saw Blades

Zou Jiaxiang, Shen Xiangfen, Xiong Hua

1994, 16(S2): 92-97. doi: 10.13374/j.issn1001-053x.1994.s2.020

[Abstract](318) [PDF 439KB](6)

Abstract:
Based on the theory of FEM and theory of Signal Analysis, Dynamic Characteristics of saw blade have been investigated, including natural frequency, mode shapes,the influences of rotational stresses on the natural frequency of saw blade and its stability. The regularities of transverse vibration amplitude of saw blade are also studied in this paper.

Roll Contour Design of 4-high Mill with Variable Crown by Axial Shifting

Zhang Jie, Chen Xianlin, Xu Yaohuan, Zhang Yong

1994, 16(S2): 98-101. doi: 10.13374/j.issn1001-053x.1994.s2.021

[Abstract](343) [PDF 333KB](9)

Abstract:
The gap crown between two work rolls of plate mills and the strip shape can be adjusted by axial shifting of the work rolls, both of them have a special contour. By the research on the function of the work roll contour. especially on the 3 power series function and the CVC roll contour function. a way to determine the contour parameters was found.The difference between CVC & UPC work rolls and the application of them was discussed.

Study on the Mathematical Model of Flow Stress of Nonferrous under Cold Forming

Gao Yongsheng, Zhou Jihua, Lun Yixin, Wang Zaiying

1994, 16(S2): 102-106. doi: 10.13374/j.issn1001-053x.1994.s2.022

[Abstract](285) [PDF 391KB](6)

Abstract:
The compress experiment of 4 aluminum alloys is made by means of a Can Plastometer with constant strain rate. The flow stress is meassured under cold deformation. 5 types of mathematic model of flow stress are analysed and compared. The effect of deformation conditions on flow stress is discussed. And the best mathematic model of flow stress is obtained.Its construction is simple, its accuracy is high, and it is suit for the use of on-line control of computer.

1994 Vol. 16, No. S2