scholarly journals Analysis of the Heating of Steel Wires During High Speed Multipass Drawing Process/ Analiza Nagrzewania Się Drutów Stalowych W Procesie Ciągnienia Wielostopniowego Z Dużymi Prędkosciami

2014 ◽  
Vol 59 (4) ◽  
pp. 1475-1480 ◽  
Author(s):  
M. Suliga
Keyword(s):  
Surface Layer ◽  
High Speed ◽  
Heated Surface ◽  
Experimental Studies ◽  
Drawing Process ◽  
Heat Accumulation ◽  
Steel Wires ◽  
Drawing Speed ◽  
The Wire ◽  
Surface Layer Thickness

Abstract The analysis of the heating of the wire including theoretical studies showed that in the multistage drawing process a increase drawing speed causes intense heating of a thin surface layer of the wire to a temperature exceeding 1100°C, which should be explained by the accumulation of heat due to friction at the interface between wire and die. It has been shown that with increasing of drawing speed the heated surface layer thickness measured at the exit of the wire from the dies is reduced significantly and at drawing speed of 25 m/s is equal to about 68 μm. The decrease in the thickness of this layer can be explained by a shorter time of heat transfer to the wire, which causes additional heat accumulation in the surface layer. Thus fivefold increase in drawing speed caused an approximately 110% increase in the temperature in the surface layer of the wire. Experimental studies have shown that the increase of drawing speed of 5 to 25 m/s will increase the temperature of the wire after coiled on the spool more than 400%.

The High Speed Wire Drawing Process of Steel Wires under Fluid Frictions Conditions

2016 ◽  
Vol 716 ◽  
pp. 76-84
Author(s):  
Maciej Suliga
Keyword(s):  
High Speed ◽  
High Carbon Steel ◽  
Wire Drawing ◽  
Drawing Process ◽  
The Finite Element Method ◽  
Wire Surface ◽  
Steel Wires ◽  
Drawing Speed ◽  
The Wire ◽  
Multiparameter Analysis

The essential purpose of the work was to determine the phenomena that occur in multipass wire drawing process of high carbon steel wires with high speed in hydrodynamic dies and to assess their influence on moulding the wire properties after the drawing process. The multiparameter analysis of the issues has involved the theoretical dissection of the phenomena arising in high speed wire drawing process in hydrodynamic dies with the usage of the finite element method supported by the experimental multipass drawing process in industrial conditions. On the basis of numerical analysis the influence of drawing speed on wire temperature was estimated. For final wires the investigation of mechanical properties, topogrhaphy of wire surface, the amount of lubricant on the wire surface, the pressure of lubricant in hydrodynamic dies were determined.

scholarly journals The Analysis of the High Speed Wire Drawing Process of High Carbon Steel Wires Under Hydrodynamic Lubrication Conditions

2015 ◽  
Vol 60 (1) ◽  
pp. 403-408 ◽  
Author(s):  
M. Suliga
Keyword(s):  
High Speed ◽  
Hydrodynamic Lubrication ◽  
High Carbon Steel ◽  
Wire Drawing ◽  
Drawing Process ◽  
Wire Surface ◽  
Compressive Stresses ◽  
Steel Wires ◽  
Drawing Speed ◽  
The Wire

Abstract In this work the analysis of the wire drawing process in hydrodynamic dies has been done. The drawing process of φ5.5 mm wire rod to the final wire of φ1.7 mm was conducted in 12 passes, in drawing speed range of 5-25 m/s. For final wires of φ1.7 mm the investigation of topography of wire surface, the amount of lubricant on the wire surface and the pressure of lubricant in hydrodynamic dies were determined. Additionally, in the work selected mechanical properties of the wires have been estimated. It has been shown that in the drawing process under hydrodynamic lubrication by drawing speed of 25 m/s the phenomena of uncontrolled formation of the surface and the diameter of the wire appears, and in the process the compressive stresses eliminating cracks on the wire surface occur, causing further smoothing. The wires drawn hydrodynamically in speed of 25 m/s, besides clearly worse properties compared to the wires drawn hydrodynamically at speeds in the range of 5 to 20 m/s, also exhibit large dimensional variations.

The Influence of the High Speed Multipass Drawing Process on the Fatigue Strength of High Carbon Steel Wires / Wpływ Wielostopniowego Procesu Ciągnienia Z Dużymi Prędkościami Na Wytrzymałość Zmęczeniową Drutów Ze Stali Wysokowęglowej

2012 ◽  
Vol 57 (4) ◽  
pp. 1171-1178
Author(s):  
M. Suliga
Keyword(s):  
Fatigue Strength ◽  
Carbon Steel ◽  
High Speed ◽  
New Technologies ◽  
High Carbon Steel ◽  
Favourable Effect ◽  
Drawing Process ◽  
High Carbon ◽  
Steel Wires ◽  
Drawing Speed

In this work the influence of the drawing speed on fatigue strength of high carbon steel wires has been assessed. The drawing process of φ5.5 mm wires to the final wire of φ1.6 mm was conducted in 11 passes, in industrial conditions, by means of a modern Koch multi-die drawing machine. The drawing speeds in the last passes were: 5, 10, 15 and 20 m/s. For φ1.6 mm wires the investigation of fatigue strength has been carried out. In order to explain the effect of drawing speed on fatigue strength of rope wires, the roughness of drawn wires have been also determined. In addition, the numerical analysis of the drawing process on the base of Drawing 2D in which distribution of redundant strain, has been shown. The data of investigations prove the favourable effect of high drawing speed on fatigue strength of drawn wires. It was found that the better fatigue strength of wires drawn at the speed of 20 m/s compared to the wires drawn at the speeds of 5-15 m/s is associated with a better geometric structure of the surface of those wires. In addition to the high fatigue strength of the wires drawn with high speed is related to theirs higher redundant strain. The obtained data investigation can be applied in wire industry while implementing the new technologies of high speed drawing process of high carbon steel wires.

scholarly journals Effect of Process Parameters in Copper-Wire Drawing

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 105 ◽  
Author(s):  
Gustavo Aristides Santana Martinez ◽  
Wei-Liang Qian ◽  
Leonardo Kyo Kabayama ◽  
Umberto Prisco
Keyword(s):  
Hydrodynamic Lubrication ◽  
Copper Wire ◽  
Wire Drawing ◽  
Drawing Process ◽  
Stress Distributions ◽  
Operational Parameters ◽  
Die Geometry ◽  
Drawing Speed ◽  
Industrial Productivity ◽  
The Wire

The efforts to increase the operating speed of the wire drawing process play a crucial role regarding the industrial productivity. The problem is closely related to various features such as heat generation, material plastic deformation, as well as the friction at the wire/die interface. For instance, the introduction of specific lubricants at the interface between the die and the wire may efficiently reduce the friction or in another context, induce a difference in friction among different regimes, as for the case of hydrodynamic lubrication. The present study systematically explores various aspects concerning the drawing process of an electrolytic tough pitch copper wire. To be specific, the drawing speed, drawing force, die temperature, lubricant temperature, and stress distributions are analysed by using experimental as well as numerical approaches. The obtained results demonstrate how the drawing stress and temperature are affected by the variation of the friction coefficient, die geometry, and drawing speed. It is argued that such a study might help in optimizing the operational parameters of the wire drawing process, which further leads to the improvement of the lubrication conditions and product quality while minimizing the energy consumption during the process.

scholarly journals The Influence of the Angle of the Working Part of the Die on the High Speed Drawing Process of Low Carbon Steel Wires

2017 ◽  
Vol 62 (2) ◽  
pp. 483-487 ◽  
Author(s):  
M. Suliga ◽  
R. Wartacz ◽  
J. Michalczyk
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Experimental Studies ◽  
Low Carbon Steel ◽  
Drawing Process ◽  
Low Carbon ◽  
Wire Rod ◽  
Steel Wires ◽  
Drawing Angle ◽  
The Impact

Abstract The paper contains the theoretical and experimental analysis of the impact of the drawing angle on the drawing process and the properties of low carbon steel wires. A multi-stage drawing wire rod with a diameter of 5.5 mm on a wire with a diameter of 1.0 mm has been carried out in two stages. The first one consisted of preliminary drawing wire rod for the wire with a diameter of 2.2 mm which was next subjected to the drawing process at a speed of 25 m/sec at the final wire with a diameter of 1.0 mm. The wires were drawn in conventional dies with drawing angle α = 3, 4, 5, 6, 7 degrees. For the wires drawn in respective variants, the investigation of the mechanical properties was performed and the amount of lubricant on the surface of steel wires was determined. Numerical analysis of the process of drawing in the Drawing 2D complemented the experimental studies. It has been shown that when drawing at high speeds, properly chosen the value of the angle of the working part of the die can improve the lubrication conditions and mechanical properties of steel wires.

Computer Simulation of Aluminum Conductors Drawn in High Speed

2013 ◽  
Vol 834-836 ◽  
pp. 1567-1570
Author(s):  
Ming Xue Yang ◽  
Jing Tian Luan ◽  
Tian Guo Zhou ◽  
Xue Fei Zhang
Keyword(s):  
High Speed ◽  
Cold Drawing ◽  
Drawing Process ◽  
Stress Strain ◽  
Drawing Speed ◽  
First Pass ◽  
3D Software ◽  
Distribution Of Stress ◽  
Deform 3D ◽  
Head Line

Drawing speed is one important process in production over-head line, deform 3d software is used to simulate the drawing process. The distribution of stress-strain and temperature in different drawing speed with die angle and friction coefficient was investigated. The results shows that the aluminum conductors can be used in high speed drawing when die angle, drawing speed and frication coefficient of first pass is about11~13 degrees, 4~6m/s and 0.08~0.10 respectively, the uniformity of stress-strain and temperature is better for producing good quality over-head wires with high cold-drawing speed.

Effect of Drawing Parameters on Elongation of Micro Copper Tube with Straight Grooves

2012 ◽  
Vol 499 ◽  
pp. 62-67 ◽  
Author(s):  
D.S. Ou ◽  
Yong Tang ◽  
Zhen Ping Wan ◽  
L.S. Lu ◽  
B. Lian
Keyword(s):  
Process Parameters ◽  
High Speed ◽  
Copper Tube ◽  
Outer Diameter ◽  
Drawing Process ◽  
Key Factors ◽  
Composite Manufacturing ◽  
Forming Mechanism ◽  
Drawing Speed ◽  
Scanning Electron

Using high-speed oil-filled spinning and multi-pass drawing composite machining methods, a micro straight groove of copper tube(MSGCT) with an outer diameter about 3 mm~6 mm was obtained, and the forming mechanism of micro straight grooves was investigated. The key factors of process parameters influence the drawing were analyzed. The experimental results show that the values of drawing elongation increases with reduction and die angle increasing. However, drawing elongation increases firstly and then becomes smooth with drawing speed increasing. Stable-quality MSGCT can be achieved by controlling the drawing process parameters and the configurations of micro straight grooves were observed by scanning electron microscope(SEM). In addition, the high-speed oil-filled spinning and multi-pass drawing composite manufacturing can further improve the capillary force of the micro straight grooves of copper heat pipe.

Pass Schedule of Wet-Wire Drawing Process with Ultra High Speed for Tire Steel Cord

2007 ◽  
Vol 340-341 ◽  
pp. 683-688 ◽  
Author(s):  
Sang Kon Lee ◽  
Won Ho Hwang ◽  
Dae Cheol Ko ◽  
Byung Min Kim ◽  
Woo Sik Ko
Keyword(s):  
Carbon Steel ◽  
High Speed ◽  
Steel Wire ◽  
High Carbon Steel ◽  
Wire Drawing ◽  
Drawing Process ◽  
High Carbon ◽  
Wire Temperature ◽  
Steel Cord ◽  
The Wire

High speed multi pass wet wire drawing has become very common for production of high carbon steel cord because of the increase in customer demand and production rates in real industrial fields. Although the wet wire drawing is preformed at a high speed usually above 1000 m/min, greater speed is required to improve productivity. However, in the high carbon steel wire drawing, the wire temperature rises greatly as the drawing speed increase. The excessive temperature rise makes the wire more brittle and finally leads to wire breaks. In this study, the variations in wire temperature during wet wire drawing process were investigated. A multi pass wet wire drawing process with 21 passes, which was used to produce steel cord, was redesigned by considering the increase in temperature. Through a wet wire drawing experiment, it was possible to increase the maximum final speed from 1000 m/min to 2000 m/min.

scholarly journals The Analysis of the Mechanical Properties of High Carbon Steel Wires after Multipass High Speed Drawning Process in Conventional and Hydrodynamic Dies

2014 ◽  
Vol 59 (2) ◽  
pp. 681-685 ◽  
Author(s):  
M. Suliga
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Carbon Steel ◽  
Yield Strength ◽  
High Speed ◽  
High Carbon Steel ◽  
Strength Properties ◽  
High Carbon ◽  
Steel Wires ◽  
Drawing Speed

Abstract In this work the influence of the drawing speed on lubrication conditions and mechanical properties of high carbon steel wires drawn in conventional and hydrodynamic dies has been assessed. The drawing process of ϕ5.5 mm wires to the final wire of ϕ1.7 mm was conducted in 12 passes, in industrial conditions, by means of a modern Koch multi-die drawing machine. The drawing speeds in the last passes were: 5, 10, 15, 20 and 25 m/s. For final wires ϕ1.7 mm the investigation of mechanical properties has been carried out, in which yield strength, tensile strength, uniform and total elongation and also number of twists were determined. It has been shown that the increase of drawing speed from 5 m/s up to 25 m/s caused the increase by 6% strength properties and decrease of plasticity properties by 10%. Higher values of tensile strength and yield strength of the wires drawn conventionally with high speeds are associated with worse conditions, while in case of wires drawn hydrodynamically the main factor which caused the increase of strength properties was high lubricant pressure in hydrodynamic die, which caused the increase of total draft.

scholarly journals Wear resistance of strengthened layers with nanocrystalline structure in friction with boundary lubrication

2020 ◽  
Vol 6 (1) ◽  
pp. 83-90
Author(s):  
Volodymyr Gurey ◽  
Keyword(s):  
Surface Layer ◽  
Cast Iron ◽  
Contact Area ◽  
High Speed ◽  
Sliding Friction ◽  
White Layer ◽  
Friction Pair ◽  
Experimental Studies ◽  
Friction Treatment ◽  
Transverse Grooves

Friction treatment refers to surface strengthening (hardening) methods using highly concentrated energy sources. The source of thermal energy occurs in the contact area of the tool-part due to high-speed friction (60–90 m/s) of the tool on the treated surface. The heating rate of the metal surface layer is 105–106 K/s. After moving the energy source from the contact zone, high-speed cooling of the surface layer of the metal takes place. The cooling rate is 104–5∙105 K/s. Under the action of high-speed heating and cooling of the contact area of the tool-part in the surface layers, a strengthened (hardened) nanocrystalline (white) layer is formed. The formed nanocrystalline surface layer has other physical, mechanical, chemical properties in comparison with the base metal of the part. Studies have shown that in the process of friction treatment of working surfaces of parts made of Steel 40NiCr6 (quench hardening and low-temperature tempering) a strengthened layer with a thickness of 250–320 μm with a hardness of 7.6–9.2 GPa is formed. The grain size of the surface strengthened layer was 20–40 nm near the treated surface. The formation of the strengthened layer is influenced by the shape of the working surface of the tool. Thus, a strengthened layer of greater thickness and hardness is obtained when machining with a tool with transverse grooves on the working part than with a tool with a smooth working part. Experimental studies in friction with maximum lubrication of pair “Steel 40NiCr6 and Grey Cast Iron GG20” showed that the strengthened nanocrystalline layer significantly increases the performance during sliding friction. Only samples made of steel were strengthened, counter-samples made of gray cast iron were not strengthened. The wear intensity of strengthened pair is 2.2–3.1 times less compared to unstrengthened pair. During the friction of the strengthened pair, the coefficient of friction and the temperature in the sliding zone also decrease. The best results were obtained when studying the friction pair in which the samples were strengthened with a tool with transverse grooves on its working part.

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