Showing papers on "Surface finishing published in 1992"

Surface finishing tape

Abstract: A surface treating tape has a sheet-like backing covered with closely spaced protuberances which are coated with an abrasive layer which contains premium abrasive particles. The surface finishing tape is useful for finishing magnetic disks and other substrates to provide a percision finish.

High corrosion resisting surface finishing method

Abstract: (57) [Abstract] [Purpose] In order to improve corrosion resistance and stress corrosion cracking resistance, an electric discharge machining method is used to form electrodes with good corrosion resistance or alloys or conductive ceramics containing these elements as electrodes. To provide a highly corrosion-resistant surface treatment method capable of simultaneously performing a surface condition adjusting treatment as a pretreatment of a surface of a modified member and an electric discharge machining alloy layer having high corrosion resistance. [Structure] Iron (Fe) such as carbon steel, low alloy steel, austenitic stainless steel or ferritic stainless steel Base alloy, nickel (Ni) base alloy, or cobalt (C o) The surface of the member 2 to be treated made of the base alloy is subjected to electric discharge machining in oil 3 or water 3 using the electrode 1 having at least one highly corrosion resistant element to remove the initial surface of the member. And forming an electric discharge machining alloy layer 7 having excellent corrosion resistance on this surface.

Imidazole-silane compounds and metal surface finishing agent containing the same

Abstract: This present invention provides a novel imidazole-silane compound which has an excellent heat resistance and a high corrosion preventive effect on metal surface and is capable of remarkably improving the adhesion of a metal to a resin substrate, a process for preparing such a compound, and a new metal surface finishing agent comprising the same. The novel imidazole-silane compound is represented by the general formula (1), (2) or (3) as defined in claims and produced by reacting an imidazole compound of the general formula (4) with a 3-glycidoxypropylsilane compound of the general formula (5) at a temperature of 80° to 200° C.

Rotary surface finishing device

Abstract: A rotary tool for performing surface finishing operations such as sanding, grinding, buffing, polishing and others. The tool has a rotary spindle with a shank portion at one end of which is retained by a rotary chuck of a power source. A portion of the spindle at the opposite end has a flexible planar surface finishing member attached to it in such manner that the member lies in a common plane with the longitudinal axis of the spindle. The finishing member is preferably made of multiple flexible layers fastened together by a centrally located eyelet. The finishing member bends when rotated against a flat or curved surface to be finished and sweeps in a linear direction across the surface. This tool is especially useful for deburring holes and is self centering when inserted in a hole.

Impedance-power effects on plasma polymer surface finish using a helical resonator discharge

Abstract: Plasma polymerized organic coatings are used in the fabrication of targets for experiments in the Inertial Confinement Fusion (ICF) program at Lawrence Livermore National Laboratory. The authors are performing experiments to understand the process conditions leading to the preparation of smooth ({approx}100{Angstrom}) plasma polymer surfaces while maintaining the highest deposition rate possible. It had been reported by Howling et al., that the formation of particulate matter in the deposition of silicon by the plasma reaction of silane affected the plasma impedance. This suggested that experiments designed to examine the correlation of surface texture with plasma impedance would be of interest. Furthermore, it is possible that an impedance change may cause a change in the power coupling efficiency from the transmitter to the plasma. Preliminary work in the authors laboratory indicated that the reactor temperature influenced the surface texture. The focus of this paper is to carefully examine the effects of reactor temperature on the surface texture of the plasma polymer, ensuring constant reactor conditions especially with respect to rf power.

Joining Process and the Effect of Surface Finishing in Soldering Aluminum with the Aid of Ultrasonic Vibration. Soldering Aluminum with the Aid of Ultrasonic Vibration. 2nd Report.

Abstract: We have been studying on soldering aluminum with the aid of ultrasonic vibration. In the previous paper, the effects of ultrasonic vibration, joining temperature and pressure on the properties of the joint were examined.In this paper, the effects of faying surface roughness and filler metal thickness on the joint properties were investigated. Furthermore, we discussed the joining process of this soldering method and referred the corrosion resistance of the joint.The Paying surface roughness and a polishing paper influenced considerably on the joint strength. Especially, when the polishing emery paper of # 1500 was used the SiC particle, which was the main component of the emery paper, was caught in the polished surface and caused the joint strength to decrease. The thickness of the filler metal also had much influence on the strength of the joint soldered at relatively low temperature. The strength was decreased with the filler metal thickness.The corrosion test revealed that the eutectic microstructure in the soldered part had low resistance to corrosion, and that the corrosion resistance increased with the increase of Al-solid solution volume in the microstructure.Referring to the joining process of this soldering method, it was known that the eutectic liquid formed at the Paying interface played the roles of not only wetting and bonding but also putting broken oxide films out of the interface.

Novel imidazole-silane compounds, process for producing the same, and metal surface finishing agent containing the same

Abstract: This present invention provides a novel imidazole-silane compound which has an excellent heat resistance and a high corrosion preventive effect on metal surface and is capable of remarkably improving the adhesion of a metal to a resin substrate, a process for preparing such a compound, and a new metal surface finishing agent comprising the same. The novel imidazole-silane compound is represented by the general formula (1), (2) or (3) as defined in Claims and produced by reacting an imidazole compound of the general formula (4) with a 3-glycidoxypropylsilane compound of the general formula (5) at a temperature of 80 to 200 C.

Tribology : principles and applications in surface finishing

Abstract: SUMMARYTribology is the science of contacting surfaces in relative motion and involves the study of friction, wear and lubrication. It is essentially an applied science since the particular conditions of the application have a crucial influence on performance and tribological studies are generally directed at achieving solutions to practical problems. Economic analyses carried out over the last 25 years have shown that approximately 1.5% of the GNP of an industrialized country can currently be saved by the control of tribological behaviour and the first 20% of this could be saved without significant investment. The principles of surface topography, contact between surfaces, friction, lubrication and wear are explained. The role of surface finishing in the control of wear is discussed alongside examples of coating selection for engineering applications.

Laser decontamination: A new strategy for facility decommissioning

Abstract: Lasers can be employed to remove both surface and bulk contamination from metals. Experiments demonstrate that {approximately}5{mu}m can be removed from an Al surface by one powerful laser pulse. Focusing with cylindrical lenses is shown to result in good surface coverage and reduced surface redeposition. High-resolution laser spectroscopy in a small atomic beam device is demonstrated and discussions of bulk decontamination by AVLIS-like methods are described. A plan for estimating the cost-effectiveness of laser decontamination technology is discussed.

Mirror surface finishing of aluminum alloy material

Abstract: PURPOSE:To perform a good mirror surface finishing stably to an aluminum material without deteriorating its form. CONSTITUTION:An aluminum allay material formed in a desired form is immersed in processing liquid, only a little of a surface part of the aluminum alloy material is dissolved, it us washed, dried, and then a mechanical mirror surface finishing work is performed to the surface of the aluminum allay material.

Method for working rod

Abstract: PURPOSE:To shorten work man-hours and to improve quality of plating by applying grooving to the surface of a rod while coating the part other than the part of required shape, applying plating to the grooved part and the recessed part, and then removing the coated film and also finishing the plated surface by means of buffing, etc. CONSTITUTION:The part other than the part of the shape requiring pattern grooving on the surface of a rod is coated with film and the uncoated rod surface is worked by means of chemical grinding or etching, by which a shallow grooved pattern is formed in the rod surface. Subsequently, the rod 1 grooved as mentioned above is subjected to plating 4 of the grooved part 3 of rod in a state where the coated film 2 is not removed and kept in this state. Then, the coated film 2 is removed from the circumferential surface of the rod 1 in the plated state by means of buffing, etc., and further, the rod surface and the plated surface are polished as shown by the part 5 to undergo surface finishing By this method, a pattern of different material can be formed on the rod surface or the rod in which different material is embedded can be produced.

Manufacture of mirror surface finishing material made of light alloy

Abstract: PURPOSE:To minimize wasteful mirror finishing work which needs high working cost and carry out stable manufacture of a mirror surface finishing material made of aluminum alloy provided with a good mirror surface irrespective of the shape of the mirror surface finishing material. CONSTITUTION:To the design surface 12 of an aluminum wheel raw material for automobile 11, shot peening is applied and mirror surface finishing such as buff polishing is applied to the processed design surface 12.

Method for finishing inner surface of concrete pipe

Abstract: PURPOSE:To enable inner surface finishing work to be continuously and integrally incorporated in the manufacturing process of a concrete pipe by polishing and finishing the inner surface of the concrete pipe tightly formed in a formwork by a centrifugal force under the condition of rotating the formwork before the concrete pipe is released from the formwork. CONSTITUTION:By rotating wheels 2, 2 on which a formwork 1 is placed, the formwork 1 is rotated, and a centrifugal force is applied to concrete in the formwork 1 to form a hollow cylindrical concrete pipe in the formwork 1. An inner surface finishing roller 3 is inserted into the concrete pipe from the end surface 1a of the formwork 1 and so positioned therein as to be in contact with the inner surface 4a of the concrete pipe 4. Then, under the condition where the formwork 1 is rotated, a rotating force is applied to the inner surface finishing roller 3 in a direction reverse to the rotational direction of the formwork 1 and, while the inner surface finishing roller 3 is moved in the longitudinal direction of the formwork 1, the inner surface 4a of the concrete pipe 4 is polished, thereby performing the inner surface finishing.

Surface finishing method of short fiber-containing rubber structure

Abstract: PURPOSE:To polish the surface of short thermoplastic fiber-containing rubber structure without softening and melting the short fibers. CONSTITUTION:Some part of or the whole surface 1a of short fiber-containing rubber structure after vulcanization is polished with grindstone such as diamond wheel or the like at the relative speed difference of 500-1,000m/min. Thus, rubber is cut off under the condition that the short thermoplastic fibers having high elasticity are left behind. At the polishing, the surface 1a is forcibly cooled down so that the surface temperature of the surface 1a is equal to or lower than the softening temperature of the short fibers 4 so as not to soften and melt the short fibers 4.

Fabrication of radiation condensing tube

Abstract: PURPOSE:To accurately fabricate the roughness and angle of inner periphery surface 8 and tapered surface 9 on a tube adopted to the path 10 of X-ray. CONSTITUTION:On the outer surface of an aluminum made mold 1 applied with surface finishing, a coating film 4 of Ni, Cu, Au, etc., is formed by evapordeposition, ion spattering or electro-plating, and then both ends of the film is ground off and the mold 1 is solved and eliminating by caustic soda to obtain an X-ray condensing tube 5.

Mach 6 electroformed nickel nozzle refurbishment: FNAS investigation of ultra-smooth surfaces

Abstract: The task objective has been to apply a coating of nickel-phosphorous alloy to a laminar flow wind tunnel nozzle by catalytic deposition and then polish and inspect the inside surface using optical device processes. The surface of the nozzle was coated with a nickel-phosphorous alloy of sufficient hardness and corrosion resistance to improve the durability. Due to plating defects that were clearly process related and not inherent, the final polished part was less than the desired quality. Surface finishing processes and lapping media were identified which produced a submicron surface finish on the interior plated surface. Defects apparently manifested by the first plating attempt were repaired using a small brush plating process demonstrating that individual small defects can be repaired. Measurement and analysis by profilometry demonstrated that quantitative control of the surface can be achieved.

Durable, Low-Surface-Energy Treatments

Abstract: Chemical treatment for creation of durable, low-surface-energy coatings for glass, ceramics and other protonated surfaces easily applied, and creates very thin semipermanent film with extremely low surface tension. Exhibits excellent stability; surfaces retreated if coating becomes damaged or eroded. Uses include water-repellent surfaces, oil-repellent surfaces, antimigration barriers, corrosion barriers, mold-release agents, and self-cleaning surfaces. Film resists wetting by water, alcohols, hydrocarbon solvents, and silicone oil. Has moderate resistance to abrasion, such as rubbing with cloths, and compression molding to polymers and composite materials.

Effect of test environment on the surface breakdown characteristics of photoconducting silicon

Abstract: The influence of test environments (vacuum and air) on the pre-breakdown and breakdown characteristics of photoconducting p-type silicon samples were investigated. The surface of all the samples were polished (mechanical and chemo-mechanical) to a fine finish (0.06 micrometers ) and cleaned by ultrasonic and RCA methods. The role of thermally grown thin amorphous SiO2 layer and the insulating epoxy layer on the breakdown properties were also investigated. The breakdown characteristics of the samples were found to be modified by the surface condition while testing in vacuum. Contrarily, the influence of those surface parameters on the breakdown properties of the same samples were found to be insignificant when the test environment was air. In general, the samples exhibited higher breakdown strength in air compared to that in vacuum. Besides, the lock-on behavior of the samples was identified only in vacuum (not in air) environment.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Apparatus for surface-finishing precast concrete board

Abstract: PURPOSE:To render the surface finish excellent and improve the workability and productivity thereof by providing a main body having upper and lower rotatable driving parts therein and a finishing disc mounted on the main shaft of the main body part, and radially forming a number of recessions on the finishing surface of the finishing disc from the central part thereof. CONSTITUTION:When a screwed shaft 11 is rotated through driving of geared motor 12, the whole of a main body part 5 moves downward via a projection 15 so that a finishing disc 6 on the lower side thereof is brought into contact with the upper part of concrete C, and desired pressing forces are applied thereon. Next, when a geared motor 16 is driven and thus a main shaft 18 rotates at high speed, the rotation is transmitted to an attaching cylinder 21 via the connecting pin 22 of a spherical surface part 18a, thereby rotating disc attaching means 19 and the finishing disc 6 at high speed. By the disc 6, the surface of the concrete C is ground to be finished. In this instance, since the finishing surface of the disc 6 is radially formed with a number of recessions 33-33 from the approximately central part to the outer periphery thereof, the frictional effect with the surface of the concrete C is raised and therefore a fine particle part is floated on the surface layer that contains much moisture impregnated on the surface layer, thus obtaining a smoothly finished surface.

Mach 5 electroformed nickel nozzle refurbishment FNAS investigation of ultra-smooth surfaces

Abstract: This task is in support of the Quiet Hypersonic Wind Tunnel effort currently in effect at NASA Langley Research Center, VA. A laminar flow wind tunnel nozzle has been previously fabricated by electroforming pure nickel over a machined and polished two piece stainless steel mandrel. The mandrel was removed leaving the replicate nozzle surface. The nozzle was then pressed into a heavy stainless steel jacket for mounting features and rigidity. The original nickel surface was a replication of the polished mandrel but had degraded due to oxidation. The inside surface requirements are very stringent in order to achieve laminar or quiet flow at the desired pressure and temperature for the specific design of Mach 5. The throat area of the axisymmetric device must have a surface finish with no defects greater than 16 microinches. This requires an rms average background of about four microinches or better for inspection purposes. A coating of nickel-phosphorous alloy was applied by catalytic deposition and then the inside of the nozzle was polished retaining dimensional and surface finish tolerances as specified per drawings supplied. Since the unit is not an optical component, conventional optical inspection methods for surface finish and figure are not readily achieved. Measurements were made using surface profilometry.