Showing papers on "Honing published in 2005"

Nanocoatings for engine application

Abstract: In this paper, a review of engineering coating for engine application is presented. Issues relating to dimensional stability, tribological properties, lubrication, coefficient of friction, hot hardness, amenability for honing, surface roughness and topography, residual stress, adherence, damage tolerance and resistance, pores density and conditions and cost performance are discussed. There exist advantages and limitations of conventional materials systems and techniques such as chemical-vapor-deposited diamond-like carbon (DLC) coating, plasma sprayed metal matrix composite coating, tribologically functional ceramic coatings, etc. Nano-grains of a crystalline phase hold promise to solve several such problems present in conventional coatings. In addition, surface-related problems are addressed for high performance engines and hydrogen powered automotive engines.

Microscale Mechanical Behavior of the Subsurface by Finishing Processes

Abstract: Hard turning, grinding, and honing are common finishing processes in today 's production. The machined subsurface undergoes severe deformation and possible microstructure changes in a small scale subsurface layer (<20 μm). Mechanical behavior of this shallow layer is critical for component performance such as fatigue and wear. Due to the small size of this region, mechanical behavior of this shallow layer is hard to measure using traditional material testing. With the nanoindentation method, mechanical behavior (nanohardness and modulus) at the microscale in subsurface was measured for AISI 52100 and AISI 1070 steel components machined by hard turning, grinding, and honing. The test results show that white layer increases nanohardness but decreases modulus of a turned surface. Nanohardness and modulus of the ground surface are slightly smaller than the honed one in the subsurface. However, grinding produces higher nanohardness and modulus in near-surface (< 10 μm) than honing, while honing produces more uniform hardness and modulus in the near-surface and subsurface, and would improve component performance. Nanohardness and modulus of the machined near-surface are strongly influenced by strain hardening, residual stress, size-effect, and microstructure changes.

Method for honing bores and honing tool therefor

Abstract: The method involves axially moving a honing tool (150) in an inner surface of a bore (115), and pressing a cutting assembly (160) at the inner surface with a feed force for processing the inner surface. Axial movement of the honing tool is strongly guided for producing an axial movement of the honing tool parallel to a boring axis (111) of the bore. The bore form is measured during and/or after a honing operation for determining a form-actual value, and difference between the form-actual value and a reference form of the bore is processed for correcting the controlling of the feed force. An independent claim is also included for a honing machine for executing a method for honing an inner surface of a bore in a workpiece.

Analyzing the Effects of Three-Dimensional Cylinder Liner Surface Texture on Ring-Pack Performance With a Focus on Honing Groove Cross-Hatch Angle

Abstract: Frictional losses in the piston ring-pack of an engine account for approximately 20% of the total frictional losses within an engine. Although many non-conventional cylinder liner finishes are now being developed to reduce friction and oil consumption, the effects of the surface finish on ring-pack performance is not well understood. The current study focuses on modeling the effects of three-dimensional cylinder liner surface anisotropy on piston ring-pack performance. A rough surface flow simulation program was developed to generate flow factors and shear stress factors for three-dimensional cylinder liner surface textures. Rough surface contact between the ring and liner was modeled using a previously published methodology for asperity contact pressure estimation between actual rough surfaces. The surface specific flow factors, shear stress factors, and asperity contact model were used in conjunction with MIT’s previously developed ring-pack simulation program to predict the effects of different surface textures on ring-pack behavior. Specific attention was given to the effect of honing groove cross-hatch angle on piston ring-pack friction in a stationary natural gas engine application, and adverse effects on engine oil consumption and durability were also briefly considered. The modeling results suggest that ring-pack friction reduction is possible if the liner honing cross hatch angle is decreased by reducing the feed-to-speed ratio of the honing tool. Reducing the cross-hatch angle increased oil flow blockage and increased the lubricant’s effective viscosity during mixed lubrication. This allowed more load to be supported by hydrodynamic pressure, reducing ring-pack friction. However, there appeared to be a potential for increased oil consumption and scuffing tendency corresponding to a decrease in honing cross-hatch angle.Copyright © 2005 by ASME

Honing installation with several work stations

Abstract: A honing installation for honing workpieces comprises a plurality of work stations, each work station being configured for performing at least one working step on a workpiece and at least part of the work station is set up as a honing station for performing at least one honing operation on a workpiece. The honing installation also comprises a conveyor system for conveying workpieces to and from work stations. There is also a control device for controlling the honing installation. Each of the work stations is directly connected to the conveyor system. This configuration allows a flexible control of the honing process.

Composite articles and methods of making the same

Abstract: Composite articles (e.g., abrasive articles (e.g., abrasive wheels and honing sticks), cutting tools, and cutting tool inserts) comprising a glass-ceramic distributed in a ceramic matrix.

Honing feed system having full control of feed force, rate, and position and method of operation of the same

Abstract: The feed system (30) for a honing machine (10) provides a capability to dynamically correct in real time errors in bore size inferred arising from variations in feed force, and a method of operation of the same. The system (10) allows a user to select between rate and force controlled honing modes, which provides one or more of the advantages of both modes. The system provides capabilities for automatic rapid automatic bore wall detection, compensation for elasticity of elements of the feed system (30) and honing tool (14), and automatic tool protection. The system is automatically operable using feed force, feed rate and positional information for honing a work piece (20) to one or more target parameters, such as one or more in-process sizes and a final size.

Functional Filtering and Performance Correlation of Plateau Honed Surface Profiles

Abstract: Plateau honing produces a unique texture on cylinder liner surface. This surface is engineered to simulate the actual running in process of the engine and results in a core layer superimposed on valleys. Because of the complex nature of the surface, characterization of such surfaces is very different from traditional surface texture analysis. Different filtering techniques have been employed to remove waviness from these profiles. Parameters are subsequently computed from the bearing area curve of the roughness profile. With recent progress in filtering of surface profiles, we propose a functional analysis approach based on morphological filters. The advantage of this technique is the clear separation of the core texture from the valleys resulting in better correlation with process and functional measures. A number of profiles are collected from two sets of liners with different performance characteristics. A cause effect model is built and used for performance prediction.

Digital control vertical high precision honing machine

Abstract: The numerically controlled vertical high precision honing machine in the field of mechanical technology includes main shaft driving mechanism of vertical honing head, radial micro feeding mechanism of honing strip, high speed smooth honing head reciprocating mechanism, and digital control system The connection mode includes vertical setting of the main shaft driving mechanism of vertical honing head and the radial micro feeding mechanism of honing strip on the honing machine bed, connection between the main shaft driving mechanism of vertical honing head and the radial micro feeding mechanism of honing strip via the feeding sleeve, and the connection of the high speed smooth honing head reciprocating mechanism to the main shaft driving mechanism of vertical honing head and the radial micro feeding mechanism of honing strip via bearing The present invention has the advantages of simple structure, reasonable layout, high stability and reliability, etc

Tool sharpening and compound honing jig

Abstract: A holder, guide, or jig for sharpening tools is disclosed, in which the jig holds and orients a tool to be sharpened to properly align the tool on or against abrasive wheels, discs, or sharpening stones, thereby creating a fine, square, beveled edge on the tool, at a predetermined and accurately reproducible angle.

Method and apparatus for automatically changing of honing tools

Abstract: The honing rod (2) takes operational forces from a honing spindle (7) and with its control device moves relative to the honing rod to control the tool functions. The coupling structures (32,33) on the honing tool (3) undo the coupling on the honing tool. The coupling device has a movable locking piece (28) to undo the bolt on the honing tool from the honing rod. Operation of the locking piece as well as fastening the honing tool into its changed position by applying force on the coupling device is effected by means of a holding device (23).

Honing bar for ultrafine processing and its preparation technology

Abstract: A grinding bar for superfine machining is proportionally prepared from Cu, Zn, Ag, Al, In and artificial diamond particles through proportionally mixing, cold die pressing and vacuum hot pressing. Its advantaegs are short machining time, high size precision and long service life.

Electro-deposited dressing gear

Abstract: PROBLEM TO BE SOLVED: To provide an electro-deposited dressing gear of long service life with little fall of electro-deposited abrasive grains of dedendums by reducing the difference between the electro-deposited layer thickness of the tips and electro-deposited layer thickness of the dedendums of the electro-deposited dressing gear whose outermost surface tooth profile shape after electro-deposited can be set to the same as a gear, and making the electro-deposited layer thickness of the dedendums deep to enhance abrasive grain holding force while enhancing the electro-deposited abrasive grain density of the dedendums. SOLUTION: The electro-deposited dressing gears 5, 6, 7 are provided for dressing an internal tooth grinding wheel, which is not shown in the figure, for honing tooth flanks of a quenched external gear with an involute tooth profile. Tooth dedendums 52, 62, 72 of dressing gear bodies 50, 60, 70 are provided with dressing gear body dedendum cutouts 55, 65, 75 forming body dedendum flanks 56, 66, 76 having intersections with involute tooth flanks 51, 61, 71 and forming an included angle θk. COPYRIGHT: (C)2006,JPO&NCIPI

Method of making abrasive articles, cutting tools, and cutting tool inserts

Abstract: Method of making an abrasive article (e.g., an abrasive wheels or a honing stick), a cutting tool or a cutting tool insert comprising glass-ceramic abrasive particles in a ceramic matrix.

Servo stroking apparatus and system

Abstract: A servo stroking apparatus and system for honing wherein the cam stroking motion follows a cam profile which produces a finite jerk profile for reducing machine vibration and optimizing one or more honing parameters. The cam profile can be selected for example from a simple harmonic cam profile, a cycloidal profile, a modified trapezoidal profile, a polynomial profile, and a modified sine profile, or a mix of cam profiles. The servo controlled stroker mechanism can include for instance a ball screw mechanism, a linear motor, a fluid cylinder, a chain drive or a belt drive. One or more other servo controlled aspects of the honing operation can be synchronized with the servo controlled stroking operation, such as the rotation of the honing tool.

Liquid honing machine and liquid honing method

Abstract: A honing machine 1 is provided with a honing zone 5 for subjecting a work 2 to a liquid honing process and a washing zone 6 for subjecting the work 2 to which the liquid honing process was executed at the honing zone 5 to a washing process in a housing 4 shielded from an external air, the honing zone 5 and the washing zone 6 being disposed adjacently A partition wall 7 for preventing an ambient gas of the honing zone 5 from entering into the washing zone 6 is disposed between the honing zone 5 and the washing zone 6 in the housing 4 An in-liquid conveying apparatus 10 for conveying the work 2 to which the liquid honing process was executed at the honing zone 5 from the honing zone 5 to the washing zone 6 with the work kept immersed in the liquid 72 in a carrying bath 11 is disposed in the housing 4

Honing feed system having full control of feed force, rate, and position and method of the same

Abstract: The feed system (30) for a honing machine (10) provides a capability to dynamically correct in real time errors in bore size inferred arising from variations in feed force, and a method of operation of the same The system (10) allows a user to select between rate and force controlled honing modes, which provides one or more of the advantages of both modes The system provides capabilities for automatic rapid automatic bore wall detection, compensation for elasticity of elements of the feed system (30) and honing tool (14), and automatic tool protection The system is automatically operable using feed force, feed rate and positional information for honing a work piece (20) to one or more target parameters, such as one or more in-process sizes and a final size

Tool for machining precision bores

Abstract: Disclosed is a tool for machining precision bores in workpieces. Said tool comprises a first machining stage that is provided with at least one geometrically defined cutting edge as well as a second machining stage which is provided with at least one honing strip encompassing geometrically undefined cutting edges. The inventive tool is characterized in that the first machining stage is provided with at least three support zones that are disposed at a distance from each other in the circumferential direction. Said at least three support zones are embodied and arranged so as to rest against the wall of the precision bore during machining thereof.

Completely cutting tool for shaving and honing gear and its usage

Abstract: The present invention relates to gear manufacturing technology, and is especially completely cutting gear shaped gear shaving cutter with involute end section edge for finishing of gear before quenching, completely cutting gear shaped honing wheel for machining hard gear surface after quenching and their usage. The present invention includes skewed-tooth gear shaving cutter and skewed-tooth honing wheel, and features that each edge can cut from the dedendum to addendum continuously and that each tooth shape curve of the skewed-tooth gear shaving cutter and the skewed-tooth honing wheel is fitted into approaching involute. The present invention is realized with the special design program PICM.

Small module arc tooth conical tooth processing technology and tool for honing pore

Abstract: A technology for machining the bevel gear with small-module arc teeth incldues such steps as machining gear blank, machining an axial central through hole, inserting a mandrel in it in tight fit mode, fixing it onto lathe, locating, machining on its surface, milling teeth, and grinding the internal surface of said through hole. A hole grinding tool is composed of a grinding rod, a basic body fixed to grinding rod, and the polishing material fixed to basic body.

Method for machining an edge of a high pressure-resistant component, in particular for hydro-erosively rounding an edge

Abstract: To optimize the results of rounding and therefore to optimize the high pressure resistance of the component, it is firstly proposed that prior to the machining step of hydro-erosive rounding, the edge ( 5 ) and the surfaces ( 4, 6 ) of the high pressure-resistant component ( 1 ) which adjoin the edge ( 5 ) are each placed under compressive stresses in the region of their surface by means of a grinding and/or honing process. Also with regard to the method, and with regard to an apparatus for the hydro-erosive rounding, it is proposed that a closure element ( 9 ) is inserted into the continuing first bore ( 2 ), downstream of the second bore ( 3 ), which branches off from the first bore, as seen in the main direction of flow (S) of the liquid ( 8 ) mixed with abrasives ( 7 ), in order to divert the liquid ( 8 ) mixed with abrasives ( 7 ) from the first bore ( 2 ) into the second bore ( 3 ).

Platform method for fabricating cylinder liner with chrome in reticulate pattern being plated

Abstract: This invention discloses a processing method for platform checkered Cr-plate cylinder jacket applying double feed honing machine before plating the jacket, the honing moire and its platform are finished once at the same process then to exercise honing to the platform moir?a in the coat surface before grinding then to process in finish lapping so as to control the microscopic geometric shape parameters at Rpk 0.16-0.18 mum, Rk0.8-1 mum, Rvk1.3-1.5 mum, Hrl is 3-5%, Mr2 is 70-80% and Mr is 50%-80% meeting the standard of ISO13565-1, ISO13565-2.

Dressing method of honing stone and dressing device

Abstract: PROBLEM TO BE SOLVED: To provide a dressing method dressing a honing stone speedily in correspondence with various tooth surface amendment of a honing gear without preparing individual dressing gears in correspondence with plural kinds of the honing gears and a dressing device. SOLUTION: The first dressing gear 251 to dress the tooth root side of the tooth surface of the honing stick 14 and the second dressing gear 252 to dress the tip side of the tooth surface of the honing stone are used as the dressing gears, and after first dressing is carried out by using either one of the first dressing gear and the second dressing gear, second dressing is carried out by using the other. The first dressing gear and the second dressing gear are respectively larger in tooth width than the honing gear and have the tooth surface having a changing region to continuously change a dressing shape to dress the tooth surface of the honing stone in the tooth width direction and dress the honing stone in correspondence with various tooth surface amendment of the honing gear in combination of positions of the changing region used for dressing. COPYRIGHT: (C)2006,JPO&NCIPI

Improvement of Surface Texture of Stainless Steel by Utilizing Dry Blasting - 2nd Report: Effect of Blasting Conditions on Wettability -

Abstract: Recently, wet blasting is generally used such as liquid honing and water jet machining in surface before plating of stainless steel. The outstanding feature of wet blasting is to prevent generation of static electric charge, to use micro abrasive grain, and to have cushioning for workpiece. On the other hand, the disadvantage of wet blasting is to generate corrosion of equipment and liquid waste under processing. Moreover, the using abrasive grain is available on a limited basis. In particular, improvement disposal of liquid waste under processing is crucial in the near future. This paper makes proposal for improvement of surface texture by utilizing dry blasting, and it conducts improvement of surface texture about martensite stainless steel (SUS420J2 In JIS), which is used in material for scale applications. As a result, it is cleared that relationship between surface texture and blasting conditions. Furthermore, based on these results, it reports relationship between surface texture and wettability.

Honing knife bar with replaceable honing sleeve

Abstract: The utility model discloses a honing knife bar with the replaceable honing sleeve which comprising a honing sleeve axle, a locking nut and a guide nut. The utility model is characterized in that: a honing stick slot which is fixedly provided with a honing stick is manufactured on the lateral wall of the honing sleeve; a regulating screw is composed of a regulating handle, a positioning table and a regulating arm; a honing core axle is composed of an axial rod, an expansion rod and a positioning rod. A position pin is movably installed in a chute on the lateral wall of the honing sleeve axle. The utility model is that; a honing rod composed of the honing sleeve axle and the honing sleeve, a honing axial is composed of the regulating screw and the honing core axle, and the honing sleeve axle and the honing sleeve are connected as a complete honing cutter through the regulating screw and the honing core axle. Because the honing sleeve axle and the honing sleeve are separated, the production can continue only through replacing the honing sleeve with the multiple reuse of the core pin when the honing sleeve is damaged at each time, and the core pin can not be replaced, and the whole knife bar is not abandoned. Consequently, the integrated cost of the knife bar and the producing cost of the product are greatly reduced, and the 45% expenses of the knife bar are economized according to the estimation.

Method of manufacturing aluminum nitride-metal joint substrate

Abstract: PROBLEM TO BE SOLVED: To obtain an aluminum nitride-metal joint substrate having high joining strength and excellent heat cycle characteristic stably with excellent reproducibility by optimizing the condition of the honing treatment for the surface of an aluminum nitride substrate in the manufacture of the aluminum nitride-metal joint substrate. SOLUTION: A substrate shaped aluminum nitride sintered compact 1 is prepared and glass beads 2 having 45-106 μm average particle diameter is sprayed on the surface 1a of the aluminum nitride sintered compact 1 to treat the sintered compact surface 1a. The aluminum nitride-metal joint substrate 6 is formed by joining a metallic plate 5 to the treated surface (substrate surface) 4a of the aluminum nitride substrate 4 surface-treated in this way by, for example, an active metal method. COPYRIGHT: (C)2005,JPO&NCIPI