Ensuring methods of antiadhesive properties of internal surfaces of road machine work-members

Leonardo da Vinci in the 16th century, used injection replica techniques to study internal surfaces of the cerebral ventricles. Developments in replicating media have made it possible for modern morphologists to examine injection replicas of lung and kidney with the scanning electron microscope (SEM). Deeply concave surfaces and interrelationships to tubular structures are difficult to examine with the SEM. Injection replicas convert concavities to convexities and tubes to rods, overcoming these difficulties.Batson's plastic was injected into the renal artery of a horse kidney. Latex was injected into the pulmonary artery and cementex in the trachea of a cat. Following polymerization the tissues were removed by digestion in concentrated HCl. Slices of dog kidney were aldehyde fixed by immersion. Rat lung was aldehyde fixed by perfusion via the trachea at 30 cm H2O. Pieces of tissue 10 x 10 x 2 mm were critical point dried using CO2. Selected areas of replicas and tissues were coated with silver and gold and examined with the SEM.

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Mathematical Model of Flat Surface Machining Inaccuracies due to Elastic Strains of Technological System

Mechanical Engineering and Computer Science ◽

10.24108/0918.0001426 ◽

2018 ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

I. I. Kravchenko

Keyword(s):

Mathematical Model ◽

Vector Field ◽

Model Development ◽

Technological System ◽

Mutual Arrangement ◽

Real Surface ◽

Main Bearing ◽

Flat Surfaces ◽

Internal Surfaces ◽

Elastic Strains

The paper considers the mathematical model development technique to build a vector field of the shape deviations when machining flat surfaces of shell parts on multi-operational machines under conditions of anisotropic rigidity in technological system (TS). The technological system has an anisotropic rigidity, as its elastic strains do not obey the accepted concepts, i.e. the rigidity towards the coordinate axes of the machine is the same, and they occur only towards the external force. The record shows that the diagrams of elastic strains of machine units are substantially different from the circumference. The issues to ensure the specified accuracy require that there should be mathematical models describing kinematic models and physical processes of mechanical machining under conditions of the specific TS. There are such models for external and internal surfaces of rotation [2,3], which are successfully implemented in practice. Flat surfaces (FS) of shell parts (SP) are both assembly and processing datum surfaces. Therefore, on them special stipulations are made regarding deviations of shape and mutual arrangement. The axes of the main bearing holes are coordinated with respect to them. The joints that ensure leak tightness and distributed load on the product part are closed on these surfaces. The paper deals with the analytical construction of the vector field F, which describes with appropriate approximation the real surface obtained as a result of modeling the process of machining flat surfaces (MFS) through face milling under conditions of anisotropic properties.

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• Investigation of operating properties of coatings used for treatment of internal surfaces of road machine actuators

All the materials Encyclopedic Reference Book ◽

10.31044/1994-6260-2019-0-5-23-28 ◽

2019 ◽

Vol 0 (5) ◽

pp. 23-28

Author(s):

V. V. Kartashova ◽

◽

N. I. Baurova ◽

Keyword(s):

Properties Of Coatings ◽

Operating Properties ◽

Internal Surfaces

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UNS C36000

Alloy Digest ◽

10.31399/asm.ad.cu0536 ◽

1988 ◽

Vol 37 (3) ◽

Keyword(s):

Corrosion Resistance ◽

Shear Strength ◽

Physical Properties ◽

Tensile Properties ◽

High Speed ◽

Heat Treating ◽

Screw Machine ◽

Trade Names ◽

Machine Work

Abstract UNS NO. C36000 is a leaded brass suitable for high-speed screw-machine work. It has many uses such as hardware, gears and pinions. Its trade names include free-turning brass, free-cutting yellow brass and high-leaded brass. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-536. Producer or source: Brass mills.

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MUELLER ALLOY 6732

Alloy Digest ◽

10.31399/asm.ad.cu0481 ◽

1984 ◽

Vol 33 (8) ◽

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

Base Alloy ◽

Heat Treating ◽

Soft Or ◽

Good Resistance ◽

Copper Base ◽

Screw Machine ◽

Copper Base Alloy ◽

Machine Work

Abstract MUELLER Alloy 6732 is a free-machining high-leaded copper-base alloy that is especially well suited for screw machine work. It can be used with hard or soft mating members. It can be joined readily by soft or silver soldering. It possesses excellent bearing properties, high mechanical properties and good resistance to corrosion. Its uses include bushings gears, bearings and pump parts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-481. Producer or source: Mueller Brass Company.

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NADH oxidase activity present on both the external and internal surfaces of soybean plasma membranes

Biochimica et Biophysica Acta (BBA) - Biomembranes ◽

10.1016/s0005-2736(97)00077-1 ◽

1997 ◽

Vol 1328 (2) ◽

pp. 99-108 ◽

Cited By ~ 22

Author(s):

Tammy DeHahn ◽

Rita Barr ◽

D.James Morré

Keyword(s):

Oxidase Activity ◽

Plasma Membranes ◽

Nadh Oxidase ◽

Internal Surfaces ◽

Nadh Oxidase Activity

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Effect of Operator Position on the Incidence of Continuous Mining Machine/Worker Collisions

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/154193120705102009 ◽

2007 ◽

Vol 51 (20) ◽

pp. 1416-1420

Author(s):

John R. Bartels ◽

Dean H. Ambrose ◽

Sean Gallagher

Keyword(s):

Response Times ◽

Health And Safety ◽

Mining Machine ◽

Workplace Relationships ◽

Continuous Miner ◽

Work Posture ◽

Close Proximity ◽

Continuous Mining ◽

Machine Speed ◽

Machine Work

Remote operation of continuous miners has enhanced the health and safety of underground miners in many respects; however, numerous fatal and non-fatal continuous miner struck-by accidents have occurred when using remote controls. In an effort to prevent these injuries, NIOSH researchers at Pittsburgh Research Laboratory examined the workplace relationships between continuous miner operators and various tramming modes of the equipment using motion captured data, predicted operator response times, and field- of- view data to determine causes of operator-machine struck-by events in a virtual mine environment. Factors studied included machine speed, direction of escape, operator facing orientation relative to the machine, work posture, distance from machine, and operator anthropometry. Close proximity to the machine, high machine tramming speeds, a right-facing orientation and operator positioning near the tail all resulted in high risk of being struck. It is hoped that this data will provide an improved rationale for operator positioning for remotely operated continuous miners.

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The One-Year In Vivo Comparison of Lithium Disilicate and Zirconium Dioxide Inlays

Materials ◽

10.3390/ma14113102 ◽

2021 ◽

Vol 14 (11) ◽

pp. 3102

Author(s):

Rini Behera ◽

Lora Mishra ◽

Darshan Devang Divakar ◽

Abdulaziz A. Al-Kheraif ◽

Naomi Ranjan Singh ◽

...

Keyword(s):

Zirconium Dioxide ◽

Clinical Performance ◽

Lithium Disilicate ◽

Study Groups ◽

Resin Cement ◽

Internal Surfaces ◽

Colour Match ◽

One Year ◽

The One

The objective of the present study was to evaluate the one-year clinical performance of lithium disilicate (LD) and zirconium dioxide (ZrO2) class II inlay restorations. Thirty healthy individuals who met the inclusion criteria were enrolled for the study. The patients were randomly divided into two study groups (n = 15): LD (IPS e.max press) and ZrO2 (Dentcare Zirconia). In the ZrO2 group, the internal surfaces of the inlays were sandblasted and silanized with Monobond N (Ivoclar, Leichsteistein, Germany). In the LD group, the internal surfaces of the inlays were etched with 5% hydrofluoric acid. The ceramic inlays were cemented with self-cure resin cement (Multilink N). Clinical examinations were performed using modified United State Public Health Codes and Criteria (USPHS) after 2 weeks, 4 weeks, 6 months and 1 year. The one-year survival rate was evaluated. In total, one failure was observed in the ZrO2 group. The survival probability after 1 year for the ZrO2 inlays was 93%, and for the LD inlays was 100%, which was statistically insignificant. The differences between both groups for most USPHS criteria (except for colour match) were statistically insignificant. Within the imitations of the present study, the lithium disilicate- and zirconia dioxide-based inlays exhibited comparable clinical performances. However, the colour and translucency match was superior for the lithium disilicate restorations.

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