A vertical vibroconveyor for the processing of granulated glass lubricant

1985 ◽  
Vol 42 (1) ◽  
pp. 7-10
Author(s):  
A. F. Mironyuk ◽  
S. V. Felonenko ◽  
A. I. Gusarevich ◽  
V. A. Serzhantov ◽  
A. B. Bykov ◽  
...  
Keyword(s):  
Glass Lubricant

Lubrication in Hot Forging with Pulsed Ram Motion

2018 ◽  
Vol 767 ◽  
pp. 149-156
Author(s):  
Ryo Matsumoto ◽  
Hiroshi Utsunomiya ◽  
Shinya Ishigai
Keyword(s):  
Stainless Steel ◽  
Motion Control ◽  
Hot Forging ◽  
Oxide Glass ◽  
Test Results ◽  
Servo Press ◽  
Lubrication Performance ◽  
Glass Lubricant ◽  
Hollow Part ◽  
Forging Load

The effect of pulsed (oscillating) ram motion control on lubrication was investigated in hot forging of stainless steel workpiece with oxide glass lubricant. During the retreat in the pulsed ram motion, the workpiece was re-lubricated by flow of lubricant through the gap between the workpiece and the die. A hot spike-type forging test on a servo press with pulsed ram motions was carried out to investigate the lubrication performance of the oxide glass. In the test, the workpiece with a temperature of 1223 K was extruded into the hollow part of the upper die together with oxide glass in a manner that combined pulsed and stepwise ram operations. The re-lubrication of the workpiece with oxide glass was confirmed by the test results showing 5–10% reduction in the forging load and 5% longer length of the backward extruded part of the workpiece under an appropriate pulsed ram motion.

Tribological Properties of Water Glass Lubricant for Hot Metalworking

2009 ◽  
Vol 52 (4) ◽  
pp. 553-559 ◽  
Author(s):  
Keishi Matsumoto ◽  
Masaru Izawa ◽  
Tetsuya Nakanishi ◽  
Kenji Tsubouchi
Keyword(s):  
Tribological Properties ◽  
Water Glass ◽  
Glass Lubricant

scholarly journals Numerical Simulation of Effect of Glass Lubricant on Hot Extrusion of Inconel 625 Alloy Tubes

2019 ◽  
Vol 37 ◽  
pp. 119-126
Author(s):  
Yong Hu ◽  
Xingmao Wang ◽  
Yubi Gao ◽  
Jiayu Xu ◽  
Yutian Ding
Keyword(s):  
Numerical Simulation ◽  
Hot Extrusion ◽  
Inconel 625 ◽  
Inconel 625 Alloy ◽  
Glass Lubricant

Effect of Glass Lubricant on the Hot Extrusion of Inconel 625 Alloy

2020 ◽  
Vol 73 (11) ◽  
pp. 2795-2805
Author(s):  
Zhi Jia ◽  
Xuan Sun ◽  
Jinjin Ji ◽  
Yanjiang Wang ◽  
Baolin Wei ◽  
...  
Keyword(s):  
Hot Extrusion ◽  
Inconel 625 ◽  
Inconel 625 Alloy ◽  
Glass Lubricant

The Effects of Friction and Lubrication on Multipass Hot Deformation

2010 ◽  
Vol 89-91 ◽  
pp. 745-750
Author(s):  
S. Funahashia ◽  
Eric J. Palmiere
Keyword(s):  
Stainless Steel ◽  
Friction Coefficient ◽  
Graphical Method ◽  
Friction Condition ◽  
Compression Tests ◽  
The Third ◽  
Steel Aisi ◽  
Glass Lubricant ◽  
Aisi 430 ◽  
Stainless Steel Aisi

Plane strain compression tests have been carried out to investigate the variation of friction coefficient for the ferritic stainless steel, AISI 430, during single and multi pass hit deformation using glass lubricant and BN. A graphical method has been employed to evaluate the friction coefficient. It is found that the friction coefficient declines as strain increases under slip friction conditions with glass lubricant. On the contrary, under partial sticking friction condition with BN, the friction coefficient increases as strain increases. Furthermore, the variation of the friction coefficient on multipass hit is almost identical with single hit until the second pass, but the value of the friction coefficient on the third pass is slightly higher than that observed following single pass deformation.

scholarly journals Insects use lubricants to minimize friction and wear in leg joints

2021 ◽  
Vol 288 (1954) ◽  
pp. 20211065
Author(s):  
Konstantin Nadein ◽  
Alexander Kovalev ◽  
Jan Thøgersen ◽  
Tobias Weidner ◽  
Stanislav Gorb
Keyword(s):  
Direct Contact ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Darkling Beetle ◽  
Coefficient Of Sliding Friction ◽  
Glass Lubricant ◽  
Friction Reducing ◽  
First Time

A protein-based lubricating substance is discovered in the femoro-tibial joint of the darkling beetle Zophobas morio (Insecta). The substance extrudes to the contacting areas within the joint and appears in a form of filiform flows and short cylindrical fragments. The extruded lubricating substance effectively reduces the coefficient of sliding friction to the value of 0.13 in the tribosystem glass/lubricant/glass . This value is significantly lower than 0.35 in the control tribosystem glass/glass and comparable to the value of 0.14 for the tribosystem glass/dry PTFE (polytetrafluoroethylene or Teflon). The study shows for the first time that the friction-reducing mechanism found in Z. morio femoro-tibial joints is based on the lubricant spreading over the contacting surfaces rolling or moving at low loads and deforming at higher loads, preventing direct contact of joint counterparts. Besides Z. morio , the lubricant has been found in the leg joints of the Argentinian wood roach Blaptica dubia .

Experimental Study on Heat Transfer Boundary Conditions for Steel Hot Extrusion Process

2013 ◽  
Vol 668 ◽  
pp. 856-860 ◽  
Author(s):  
Chang Yong Liu ◽  
Lei Zhang ◽  
Fei Yu Kang
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Boundary Conditions ◽  
Thermal Contact ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Experimental Basis ◽  
P92 Steel ◽  
Glass Lubricant

Heat transfer boundary conditions have significant influence on the FEM analysis of the steel hot extrusion process using glass lubricant. However, the determination of heat transfer coefficient between billet and tooling lacked experimental basis. In order to obtain rational values of the coefficient, experimental study was conducted to measure it on thermal contact between P92 steel and H13 steel separated by glass lubricant. The influence of contact temperature, contact pressure and lubricant thickness was investigated. The obtained results can provide experimental basis for the determination of heat transfer boundary conditions for steel hot extrusion.

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