Optimum curved die profile for tube drawing process with fixed conical plug

Farahani, Nima Dabiri; Parvizi, Ali; Barooni, Ali; Naeini, Sina Anvari

doi:10.1007/s00170-018-1803-6

Cited by 23 publications

(7 citation statements)

References 19 publications

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“…Farahani et al [3] found the optimum design profile of the die. Based on this study, they applied two methods of analysis (FEM and the slab method) and compared the results of these two methods for conical and curved specimens.…”

Section: Introductionmentioning

confidence: 99%

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Darki¹,

Raskatov²

2023

JMechE

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Considering the complexity of the radial forging process, the study of dynamic and thermodynamic parameters is of great importance. With the severe deformation of a workpiece in a plastic state, the effects of all parameters affecting the final geometry of the forging pipe need to be optimized. Thus, the mathematical model of the process is based on visco-plastic material, taking into account thermomechanical coupling and the surface properties during forging, including the hardness of the workpiece and friction. The results present the effects of a die angle on residual stress, total wear, and contact force, leading to ideal operating conditions and the ideal design of machine parts. In order to ensure the accuracy of the calculations and predictions made through software, a hardness test was performed experimentally, which showed the hardness curve of the microstructure and the strain of the workpiece. This indicates the consistency and accuracy of the results obtained from both methods. In order to improve the process and the tube employed, using an optimized die is recommended.

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Section: Introductionmentioning

confidence: 99%

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Darki¹,

Raskatov²

2023

JMechE

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“…The internal friction surface is the zone of simultaneous reduction of the diameter, the wall of the tube, and the surface of the cylindrical part of the plug in the calibration zone (Figure 1). The work of frictional forces on the above-mentioned surfaces is completely transformed into heat, resulting in a local increase in the temperature of the drawing die, tube, and floating plug, as well as the lubricating film on the outer and inner surfaces of the tube [6,7]. The intensity of the heat released is a function of the following factors [8,9]:…”

Section: Introductionmentioning

confidence: 99%

“…Danckert and Endelt [23] proposed a new plug with a circular profiled plug instead of a conventional cylindrical plug, which forms a cylindrical bearing channel between the die and the plug. The results of numerical FE-based analysis showed that the drawing force can be reduced and that the drawing force is nearly independent of the length of the The work of frictional forces on the above-mentioned surfaces is completely transformed into heat, resulting in a local increase in the temperature of the drawing die, tube, and floating plug, as well as the lubricating film on the outer and inner surfaces of the tube [6,7]. The intensity of the heat released is a function of the following factors [8,9]:…”

Section: Introductionmentioning

confidence: 99%

“…The work of frictional forces on the above-mentioned surfaces is completely transformed into heat, resulting in a local increase in the temperature of the drawing die, tube, and floating plug, as well as the lubricating film on the outer and inner surfaces of the tube [ 6 , 7 ]. The intensity of the heat released is a function of the following factors [ 8 , 9 ]: kind of tube material drawn, its yield point, and the intensity of work hardening, friction conditions and tribological properties of the lubricant used, drawing speed, geometric parameters of the deformation zone (the angle of the die cone, the angle of the conical zone of the floating plug, the material strain in the diameter reduction zone and in the zone of simultaneous diameter reduction and wall thinning, and the width of the calibration strip.…”

Section: Introductionmentioning

confidence: 99%

“…Analysis of the issues shows that previously proposed solutions related to the influence of various factors on the stability of the plug in the deformation zone [ 10 , 11 ], the impact of dependency and the geometrical dimensions of dies and plugs on the intensification of deformation and process velocity [ 5 , 6 , 7 , 10 , 12 , 13 ], tool materials [ 6 ], minimising stress during drawing [ 14 , 15 ], and the influence of friction and lubricants applied by various methods in carrying out the process [ 16 , 17 , 18 , 19 ]. After introducing the technology of tube drawing with a floating plug into production, it was often believed that tube drawing was only possible under the condition that D T > D 1 (where D T is the plug head diameter and D 1 is the diameter of the die) [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

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Cold Drawing of AISI 321 Stainless Steel Thin-Walled Seamless Tubes on a Floating Plug

Żaba,

Trzepieciński

2023

Materials

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The paper presents the results of an analysis of the process of drawing AISI 321 stainless steel thin-walled seamless tubes on a floating plug. The influence of the geometry of dies and plugs, drawing velocity, and lubricants on the possibility of carrying out the pipe drawing process without a loss of strength of the lubricating film and, consequently, disturbance of the forming process and tube cracking, and also on the temperature in the drawing process, the mechanical properties of the tubes drawn, and the microhardness and roughness of the inner and outer surface of the tubes was investigated. The parameters of the drawing tools used were as follows: angle of drawing dies α = 16° and floating plugs with angles of inclination of the conical part of the plug β = 11.5°, 13°, and 14°. The drawing dies and floating plugs were made of G10 sintered carbide. Drawing speed was varied over the range 1 to 10 m/min. The study used several lubricants. Tubes with dimensions (outer diameter D0, wall thickness g0 before drawing process) D0 = 19 mm, g0 = 1.2 mm and D0 = 18 mm, g0 = 1.2 mm were drawn to produce tubes with dimensions (outer diameter Dk, wall thickness gk after drawing process) Dk = 16 mm, gk = 1.06 mm on a drawbench with the same total elongation, while the diameter and wall thickness were changed. During the process, continuous measurements were made of the drawing force and temperature in the deformation zone and on the tube surface. It was found that the drawing process causes a decrease in the roughness parameters Ra and Rz of the inner surface of the tubes. Moreover, after drawing, an increase of 30–70% was observed in the microhardness of the tube material in relation to the microhardness of the charge material. Based on the test results, it can be concluded that the work of frictional forces is the main direction of optimization of tube drawing on a floating plug process of hard-deforming materials.

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A high-speed precision micro-spindle use for mechanical micro-machining

Liu

Ren

2019

Int J Adv Manuf Technol

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Optimum curved die profile for tube drawing process with fixed conical plug

Cited by 23 publications

References 19 publications

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Cold Drawing of AISI 321 Stainless Steel Thin-Walled Seamless Tubes on a Floating Plug

A high-speed precision micro-spindle use for mechanical micro-machining

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