Numerical Modelling Of Metal Flow In The Cold Forming Of Industrial Fasteners

2007 ◽  
Author(s):  
P. Hartley
Keyword(s):  
Numerical Modelling ◽  
Metal Flow ◽  
Cold Forming

Numerical Modelling of the Molten Metal Flow in a Disk Agitator Mixer

2017 ◽  
Vol 743 ◽  
pp. 369-372
Author(s):  
Marina Khmeleva ◽  
Aigerim Tokhmetova ◽  
Leonid Minkov ◽  
Vladislav Dammer ◽  
Sergey Vorozhtsov ◽  
...  
Keyword(s):  
Flow Field ◽  
Numerical Modelling ◽  
Molten Metal ◽  
Rotational Speed ◽  
Metal Flow ◽  
Turbulent Diffusivity ◽  
Power Number ◽  
Air Interface ◽  
Molten Metal Flow

Numerical modelling of the molten metal flow in a crucible under the action of stirred disk agitator is carried out. The influence of the agitator rotational speed on the molten metal flow field is investigated. Dependences of the turbulent diffusivity and the power number on the agitator rotational speed are obtained. The effect of the interaction between the molten metal-air interface and agitator elements on the flow field in a crucible is shown.

scholarly journals Numerical modelling of T-pipe joints forming

2018 ◽  
Vol 190 ◽  
pp. 04005
Author(s):  
Jarosław Bartnicki
Keyword(s):  
Numerical Modelling ◽  
Experimental Verification ◽  
Metal Flow ◽  
Industrial Applications ◽  
Numerical Calculations ◽  
Wide Scope ◽  
Technological Parameters ◽  
Forming Process ◽  
Damage Criterion ◽  
Pipe Joints

This paper presents results of numerical calculations of T-pipe joints (tee) forming process for a wide scope of industrial applications. FEM analyses were conducted for the chosen process technological parameters and tools designs. The kinematics of metal flow in the area of the formed flanges was analysed. Distributions of stresses, strains and damage criterion during forming were determined. Calculated values of forces and moments acting on tools and workpieces allow for designing of tools geometry for experimental verification of the proposed forming process.

Study of the process of forming a hole for a thread at manufacturing a high nut

2020 ◽  
Vol 76 (8) ◽  
pp. 841-846
Author(s):  
I. G. Shubin ◽  
A. A. Kurkin
Keyword(s):  
Metal Flow ◽  
Nonlinear Dependence ◽  
Geometrical Parameters ◽  
Relative Height ◽  
Forming Process ◽  
Normal Height ◽  
Accuracy Class ◽  
Limit Values ◽  
Program Complex ◽  
Class B

During manufacturing nuts of increased height, a problem of obtaining correct cylindrical form of the hole for thread and overall geometrical parameters arises. To solve the problem it is necessary to know regularity of the blank forming process. Results of the study of a technological process of high hexahedral nuts forming presented. The nuts were M18 of 22 mm height, M16 of 19 mm height and M12 of normal height 10 mm according to GOST 5915–70, accuracy class B, steel grade 10 according to GOST 10702–78. The volumetric stamping was accomplished at the five-position automatic presses of АА1822 type. It was determined, that unevenness of the metal flow in the process of plastic deformation of blanks of increased height nuts was caused by different stress conditions by their sections. To simulate the mode of deformation, the program complex QForm-3D was chosen. The complex ensured to forecast with necessary accuracy the metal flow in a blank, as well as to define the deformation force and arising stress in the working instrument. The simulation showed the presence of regularity between preliminary formed buffle and deviation of dimensions and form of a blank wall after its finishing piercing, which can be expressed by a nonlinear dependence. The limit values of the relative height of the buffle С/D = 0.56–0.588 defined, exceeding which will result in rejection of the finished product. Accounting the limit values of the relative height of the buffle will enable to correct a mode of technological operations and technological instruments at stamping of high hexahedral nuts.

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