Showing papers on "Honing published in 2007"

In praise of the incomplete

Abstract: No leader is perfect. The best ones don't try to be -they concentrate on honing their strengths and find others who can make up for their limitations.

Cylindrical internal surface with thermally spray coating

Abstract: A thermally sprayed coating is deposited onto a cylindrical internal surface of a base member after a rough surface has been formed on the cylindrical internal surface. The tapered surface is configured such that the internal diameter of the axial end portion is larger than the internal diameter of the remaining portions of the cylinder bore internal surface. After the tapered surface is formed, the thermally sprayed coating is honed. This method prevents exfoliation of a thermally sprayed coating at an end portion of a cylindrical internal surface in a situation where honing or another mechanical finishing process is applied to the thermally sprayed coating after the coating is formed on the cylindrical internal surface.

Method for machining that combines fine boring and honing and machining equipment for the execution of the method

Abstract: According to a method for the fine machining of internal surfaces of bore holes in tools by fine boring and subsequent honing, the following steps are executed: Fine boring of at least one bore hole ( 131 ) in a tool ( 130 ) by means of a fine boring tool ( 128 ) of a fine boring device ( 120 ) for the creation of a fine bored hole; Transfer of the tool to a machining position of a honing device ( 140 ) for the machining of the fine bored bore hole by means of a honing tool ( 148 A) of the honing device; Measurement of the fine bored bore hole with one of the measurement devices ( 160 ) allocated to the honing device in the machining position for the creation of at least one bore hole measurement signal representing the properties of the fine bored bore hole. The fine boring device is controlled subject to the bore hole measuring signal.

Hardide™: advanced nano-structured CVD coating

Abstract: Hardide™ is a family of new low-temperature Chemical Vapour Deposition (CVD) Tungsten/Tungsten Carbide coatings. Coating consists of Tungsten Carbide nano-particles dispersed in metal Tungsten matrix, that give the material enhanced hardness of between 1100 Hv and 1800 Hv, and abrasion resistance up to 12 times better than Hard Chrome. Nano-structured materials show unique toughness, crack and impact-resistance. The coating is resistant to acids and aggressive media, can be produced on steel, including stainless steel and some tool steels, with coating thickness varied from 5 microns to 100 microns. Gas-phase CVD process allows coating internal surfaces and items of complex shape like dies, moulds, pump cylinders. Homogeneous pore-free structure facilitates finishing by honing, polishing, mirror finish can be achieved with suitable substrate. Use of Hardide with cutting tools for paper and plastics makes them self-sharpening. Application of Hardide increases life of tools and critical components and reduces down-time.

Blade sharpening device

Abstract: A blade sharpening device is provided for honing a cutting edge of a blade. The device includes a block with a top honing surface, and a jig assembly mounted on the block. The jig assembly holds a blade in a fixed position adjacent the honing surface, and directed towards the honing surface, so that a sharpening stone can be manually moved on the top honing surface and across the blade edge for sharpening. The stone can be moved longitudinally, laterally, and circularly. The jig assembly is pivotally mounted on the block for a desired sharpening angle, and vertically adjustable so that the blade edge is substantially flush with the top honing surface of the block.

Non-cylindrical drilling surface producing method for use during processing of cylindrical piston bore in cylinder block of internal combustion engine, involves performing position honing and uniformly smoothening surface

Abstract: The method involves forming a non-cylindrical drilling surface (NZF) by radially pushing machine hones in a form hone tool into a drilling surface of a borehole formed in a work piece. The cylindrical fine boring or position honing are performed on the non-cylindrical drilling surface by form hone or form hones with two machine hones, which are controllable and adjustable independent of each other. The non-cylindrical drilling surface is uniformly smoothened by equally removing the material with constant pressure using machine hones. An independent claim is also included for a form hone tool comprising machine hones.

Super-abrasive metal bonded grinding wheel

Abstract: PROBLEM TO BE SOLVED: To obtain a long service life (wear resistance) and stable high cutting property of a grinding wheel used for precise cutting such as honing and superfinishing and polishing, and to provide a metal bonded grinding wheel having the long service life and stable high cutting property by discharging fine cut chips without generating clogging, even if using water-soluble oil excellent in cooling property, in particular. SOLUTION: This super abrasive grain metal bonded grinding wheel is made by dispersing soft abrasive grains including super abrasive grains and barium sulfate in sintering metal bonding containing metal particles and glass particles and integrating the sintering metal bonding and the soft abrasive grains by sintering. When the glass components of the sintering metal bonding are destroyed to generate a chip pocket, discharging performance is enhanced by a flow of the destroyed particle pieces by blending barium sulfate, and thereby there is an action to quickly and more surely form the chip pocket. COPYRIGHT: (C)2009,JPO&INPIT

Digital control cylindrical lapping machine

Abstract: The utility model discloses digital-control outer circle honing machine. The honing machine includes an under bed, a head box at the left of the bed, a tailstock at the right of the bed, and a carriage, a honing head, a feeding box, a central frame and an operation platform arranged in turn in the middle. A main motor is arranged in the left back of the bed, a hydraulic platform is arranged in the right back, and a cooling box is in the central back. The honing head is arranged on the carriage through the brackets at both ends, and a honing head shaft is arranged above the brackets. The honing head comprises an upper part and a lower part, and the upper part is connected with the lower part through a fastening bolt in the left end and a pin shaft in the right. Oil cylinders are evenly distributed on the upper part and the lower part of the honing head, springs are evenly distributed on inner side of the oil cylinders, and honing bars are most inside. A piston rod and two pins are arranged inside the oil cylinder. The utility model is featured with uniform force on workpiece, no bending or deformation, and high machining efficiency.

Process and apparatus for grinding with electrolytic dressing

Abstract: A process for grinding workpieces is obtained which includes attaching honing stones to a tool, each of the honing stones including grinding particles and an electroconductive connection for fixing the grinding particles to each other; grinding the workpieces with the honing stones by applying a honing liquid having substantially no electroconductive property to a region between the workpiece and the honing stones, the workpieces being successively ground during a series of processing periods, while interposing non-processing periods between the processing periods, each of the workpieces being ground in one of the processing periods; and performing an electrolytic dressing with respect to the honing stones by using an electrode provided to face the honing stones with a space therebetween, a voltage being applied between the honing stones and an electrode in the presence of an electroconductive liquid in the space between the honing stones and the electrode, the electrolytic dressing being carried out during the non-processing periods.

Experimental Investigation on Honing of Small Holes

Abstract: As a special kind of grinding, honing is a typical low speed precision machining process, which is of low grinding speed, little grinding heat and little thermal-residual deformation of workpiece, suitable for precision machining of holes in the precision couples of internal-combustion engine. Experimental investigation on effects of process parameters on honing efficiency of small holes was put forward in this paper to obtain economical machining efficiency. Circumferential speed, reciprocate speed and working pressure of honing stone are the key factors which affect the machining efficiency and quality of honing. Taking it as a case study the honing of the small middle hole of the valve seat of balancing valve couples of internal combustion engines, honing experiments were carried out in this paper to investigate the relationships of material removing rate in rough honing versus circumferential speed, reciprocate speed and working pressure in honing of small holes. The results show that in honing of small holes the material removal rate in rough honing increases with circumferential speed, reciprocate speed and reticulate cross-angle increasing but decreases when the two speeds exceed certain critical values, and the surface quality in finishing honing is improved by increasing circumferential speed.

Ultrasonic wave metallic surface finishing machine

Abstract: The utility model provides an ultrasonic wave metal surface processing machine, which belongs to machining equipment field, and comprises machine body, frequency conversion main shaft box, chuck and master control panel. The features of the machine is: A precise guide rail pair that is parallel with chuck rotary axis is set before the machine body, sliding plate is set on the precise guide rail pair, turning precise feed system and ultrasonic surface processing system are set on the sliding plate, the turning precise feed system and the ultrasonic surface processing system are connected with high precise digital control circuit that is set in the frequency conversion main shaft, technical parameters are inputted and revised by operation stand on the sliding plate. Comparing with current technology, the utility model can make ultrasonic surface processing while making turning, can have high processing efficiency while ensuring accuracy of work piece sizes; and can replace grinding machine processing completely. In comparison with traditional processing means such as grinding, sand belt grinding, polishing, abrading and honing, the machine is more economic, has higher surface quality, has high processing efficiency, has equal accuracy with that of grinding machine after processing, and can realize integral processing by combining digital control lathe and digital control machining center.

Honing guide assembly with camber roller

Abstract: A tool honing guide and an adjustable roller that contacts an abrasive surface during use of the guide facilitates formation of micro bevels, and the roller is barrel-shaped to facilitate honing a curved cutting arris.

Method for machining sprayed coating

Abstract: PROBLEM TO BE SOLVED: To provide a method for machining a sprayed coating forming the sprayed coating excellent in machinability with high shape precision after honing. SOLUTION: In this method, the film W3 formed in a bore C1 surface is machined by dry machining. A cutting tool is rotated at a rotational speed of 400-800 m/min when the cutting tool with a cutting tip containing 60-80 wt.% CBN (cubic boron nitride) is used, and rotated at the speed of 400-900 m/min when the tool with the tip containing 80-90 wt.% CBN (cubic boron nitride) is used. The method comprises: a first step for performing boring to a part of a predetermined machining amount of the sprayed coating W3 while moving the tool by a prescribed feeding rate in the bore; and a second step for performing honing to the remaining part of the predetermined machining amount thereof by using a grinding tool with a grinding wheel. COPYRIGHT: (C)2008,JPO&INPIT

A new ultrasonic vibration machine for honing

Abstract: The ultrasonic vibration machine for honing is a new high-tech product that combined technologies with machine, electricity and sound. It can be widely used in motor vehicle industry to improve the surface quality of engine cylinder sleeve. In this paper, the constitution and the structure of this device are described in detail; the key technology such as supersonic generator, transducer and amplitude pole are introduced, involving their design and application; and the experimental result is finally given.

Influence of micro-patterned laser surface texturing on the tribological performance

Abstract: Laser Surface Texturing (LST) is an advanced method of surface micro-texturing technology. The aim of this paper is to investigate the effect of micro-patterned laser texturing surfaces on hydrodynamic lubrication. Numerical model of 3D micro-patterned laser texturing surfaces is set up based on Reynolds equation. By Full Multi-Grid (FMG) V Cycle Algorithm, matrix pattern and interfering pattern are investigated on several pattern parameters. It is shown that the lubrication performance is influenced by the type and parameter of the micro-pattern. Result indicates that the ability of interfering pattern on pressure built-up is better than the matrix pattern. It is clearly shown that the interfering ratio of interfering pattern also influences the lubricating performance and the optimal value of interfering ratio is around 0.4. Finally, geometry parameters of laser texturing micro-pore are also studied under patterned surface. Compared with previous literature in single micro-pore cell analysis, result shows that it is essential to investigate the geometry parameters of micro-pores in patterned surface. Numerical result of investigation has been applied in laser surface honing of cylinder-piston system successfully.

Floating type laser cutting device

Abstract: A floating laser cutting device includes a main frame, a truss and a laser head. The utility model is characterized in that the two sides of the main frame are fixed with a non-rod cylinder which drives the honing to move; the permanent magnetic positioning clamp used for positioning and clamping the moveable steel plate is arranged on the bottom surface of the lower transverse beam of the truss; the laser head is assembled on the transverse guideway of the honing supporting frame; the end of the piston rod of the lifting cylinder which is articulated on the honing supporting frame is connected with the vertical guide column which is connected with the sliding block; the vertical guide frame of the drive truss of the lifting cylinder moves to-and-fro in-phrase along the guide column. The utility model solves the problem of that the continuous positioning and cutting can not be implemented in the transmission process in the prior art. The utility model adopts the permanent magnetic positioning clamping device which clamps and disconnects the steel plate freely to make the transmission structure is more reasonably designed; the steel plate is continuously cut and fast exactly positioned during the transmission process; comparing with the electromagnetic transmission, the utility model is automatically controlled, has a simple operation, effectively eliminates the effect of the electromagnetic field on the electric control device, and obviously improves the cutting quality and the work efficiency of the laser head.

Alternating rotating direction honing cylinder jacket platform webbing technique

Abstract: The invention relates to an alternating direction of rotation honing cylinder jacket platform cob webbing technique that is used to facilitate the oil storage and lubrication feature of the engine friction, extend durability, reduce engine oil consumption, improve engine tail gas emission quality, for the benefit of environment protection and human health. Through alternating direction rotation honing cylinder jacket platform cob webbing, it can expose the graphite sufficiently, timely release lubrication oil to the friction system. This technique has acquired international standard parameter, allowing the inner wall of the cylinder jacket acquiring small platform and deep slot, increase bearing area of the small platform, with the deep slot storing oil better, improving sealing capacity, reducing oil consumption, allowing the engine tail gas emission reaching Euro III standard for the benefit of environment protection and health of mankind.

Honing device for cylinder bore

Abstract: PROBLEM TO BE SOLVED: To form uniform grinding streaks even on a cylinder bore having a shape different from a circular shape in cross section by a simple device in a honing device for the inner surface of the cylinder bore SOLUTION: A honing stick 1 comprises a plurality of honing sticks 1a, 1b, 1c orderly arranged in the axial direction A plurality of the sets of the honing sticks are mounted on a honing head body 2 in the circumferential direction Each honing stick is attached to a plunger member 12 which slides in the radial direction, and pressed against the inner surface of the cylinder bore CB by the hydraulic pressure of a grinding oil contained in the grinding oil chamber 21 of the honing head body Since the size of each honing stick is small and slides independently, the honing stick accurately follows a variation in the shape of the inner surface of the cylinder bore Therefore, the honing stick can form a uniform cross hatch The grinding oil force-fed into the grinding oil chamber 21 during the honing is supplied to the inner surface of the cylinder bore via a through passage in a mounting bolt 28A COPYRIGHT: (C)2009,JPO&INPIT

Study on Mechanism and Experiment of Engine Cylinder by Laser Honing

Abstract: The diesel engine cylinder was processed by laser honing (LH) device, the structure morphology was observed with scanning electric mirror (SEM), and lubricant consumes and wear performances were measured, at the same time the mechanism of LH and effects of laser parameters on LH results were analyzed. The experimental results are shown that LH is a kind of phase transformation treatment by laser, which processes a hardening belt in the certain distributing form on the work-piece surface, and forms the hardness distribution of soft and hard material alternatively; LH may lower the engine oil consumes 30%-60%, and reduce the pollution of the catalyst machine, and lower the grain let of the engine oil 25%-30%. LH intentionally machines the grain cave, which has the certain angle, depth, and width etc.. The surface microcosmic sculpting has the lubricating function for usage process, and storage and transport lubricant, which improves the rubbing condition, then lower the part wear and increase the other performances. The short-wave laser is more applicable to the LH process, which improves the lubrication condition, and increases the service life of the engine and the efficiency, and lowers the engine oil consumes.

Pre-and post-process bore gaging using a honing feed system equipped with feed force sensing

Abstract: The method of the invention provides a capability for accurately and uniformly determining the sizes of bores of workpieces, both pre- and post-process, to improve process control, particularly compensation for tool or stone wear and other factors, and process data collection. The present method makes all required bore measurements, including those in both the workpiece bore and the calibration ring or sample workpiece bore, with the honing tool, under controlled static, non-honing conditions, including expanding the tool in the bores in a predetermined manner, such as at a predetermined rate. The method of the invention has utility for honing multiple workpieces to a finished size with a single tool, and also for multiple spindle applications.

Surface coated cemented carbide cutting tool

Abstract: PROBLEM TO BE SOLVED: To surely exhibit superior abrasion resistance and promote highly-efficient machining by preventing the chipping of a cutting edge and extending the life of a tool when cutting high-hardness steel by a rotary tool. SOLUTION: A cutting edge 4 is coated with a hard coated layer of 1 to 5 μm which has a hardness Hv of 2,800 or more and consists of (Tix, Aly, and Siz)N, (wherein x, y, and z satisfy the relation of 0.01≤z≤0.05, 0.4≤y≤0.7, and x+y+z=1 by atomic ratio) on the surface of a cemented carbide substrate having a hardness HRA of 93.0 to 94.5 and containing, by mass, 4.5 to 8% Co, 0.2 to 1.5% Cr 3 C 2 , and 0.1 to 0.5% VC. The cutting edge 4 is disposed such that the cutting edges 8 face the outer peripheral side of the tip of a tool body 1 which is rotated around an axis O. The cutting edges 8 are formed in a circular arc shape when viewed from a rotational direction T side of the tool, are treated with round honing into 0.01 to 0.05 mm width, and have a clearance angle of 15° or less and a cutting edge angle θ of 19° or less. COPYRIGHT: (C)2010,JPO&INPIT

Improvement of Surface Texture of Stainless Steel by Utilizing Dry Blasting - 3rd Report: Effect of Blasted Texture on Adhesion of Plating -

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. In the previous report, it has been cleared that relationship between surface texture and wettability. In this report, adhesion of plating was measured by scratch test. As a result, it was cleared that availability of adhesion evaluation by utilizing wettability.

Throwaway tip and its manufacturing method

Abstract: PROBLEM TO BE SOLVED: To provide a throwaway tip capable of more strictly setting a cutting blade shape in a specified shape without causing welding even in cutting hardened steel, etc. SOLUTION: Surface roughness Rz of a honing surface 11 is set in a range of 0.1 to 0.5Z by setting surface roughness Rz of a flank 10 at least on the crossing crest line side of the cutting blade part 8 in a range of 0.1 to 0.5Z and forming the honing surface 11 along the crossing crest line of this cutting blade part 8 on this throwaway tip on which the cutting blade part 8 made of a cemented carbide sintered body 6 in a periphery of the crossing crest line part of a rake face 9 and the flank 10 of a tip main body 1. COPYRIGHT: (C)2008,JPO&INPIT

Method for working inner surface of cylinder and cylindrical member

Abstract: PROBLEM TO BE SOLVED: To provide a method for working the inner surface of a cylinder where, when finish machining such as honing is performed after the formation of a thermal spray coating, the peeling of the thermal spray coating in the edge part in the axial direction of the inner surface of a cylindrical part is prevented. SOLUTION: A rough surface 17 is formed on the inner surface 5 of a cylinder bore, thereafter, a thermal spray coating 7 is formed thereon, and subsequently, a tapered face 101 is worked to the edge part on the side of a crank case 9 in such a manner that the inside diameter of the edge part on the side of a crank case 9 at the inner surface 5 of the cylinder bore is made large compared with the inside diameter of the other part. After the working of the tapered face 101, honing is performed to the sprayed coating 7. COPYRIGHT: (C)2007,JPO&INPIT

Self-aligning honing device

Abstract: A hand-operated honing device providing engagements of a blade of a tool by a honing stone at pre-selected angles to the blade is disclosed.

Arrow blade sharpening apparatus

Abstract: The arrow blade sharpening apparatus is best suited for precision sharpening of arrow blades, Exacto(R) knife blades, and other like edges which require precision and fine honing. The transparent lidded apparatus is motorized and counter rotates drive gears and then ceramic abrasive wheels with a single motor. The slot of the housing and the guide of the blade holder provide for exact sharpening work without the possibility of angle misalignment of the blade-to-wheel contact.

Surface Texturing Technology by Laser Honing Based on Hydrodynamic Lubrication

Abstract: The laser honing technique is a new surface texturing technique. As the piston ring at the top or lower oil attachment point works under worse lubrication condition, its wear increases severely, laser texturing was used to the piston ring/liner, lineary extending grooves and regular arranged dimples with predetermined parameters was well-matched with the needs of lubrication. The effects of different dimple shapes, such as sphere coronal, combined sphere coronal ,columnar, hexahedral, and trapezoidal dimples was analyzed by the theory of hydrodynamic lubrication. It was deduced that trapezoidal dimples are fit for only single running orientation and sphere coronal and combined sphere coronal dimples are fit for double running orientations. The experimental researches show that laser texturing not only can reduce the oil consumption and the cost of engine but also can prolong its work life.

Cylindrical grinding machine tool

Abstract: An external honing machine tool is provided, which is employed for the fine honing of long and slender axle The utility model is characterized in that: only a honing head can be adopted for the processing of various workpieces with large diameter scope Meanwhile, the adoption of hydraulic floating mode ensures that the sand strip swings along with the workpiece, thus preventing the occurrence of processing defect The machine tool is composed of a headstock, a machine body, a honing head, a base plate and a tail holder The workpiece is clamped on the principal axis and the tail holder and is driven by the principal axis to rotate; the honing head is fixed on the base plate; the base plate performs back-and-fro straight line movement on the machine body; the honing head is configured as a hollow circular body; the workpiece passes through the honing head; a plurality of feeding oil cylinder is fixed on the honing head; the axial line for the piston rod of the oil cylinder intersects with the axial lines of the principal axis and the tail holder; crude grinding sand strip and fine grinding strip are respectively fixed on the two groups of piston rod in the feeding oil cylinder; the oil inlet ports for e each group of feeding oil cylinder with rod cavity are communicated in parallel via oil pipes; the oil inlet port without rod cavity are communicated in parallel via oil pipes; the pressurized oil passes through two reversing valves and respectively drives the two groups of feeding oil cylinder to work

Method for honing bores with honing tool, involves driving honing tool in such position in bore of work piece that one group of honing stone retainers is located in bore and other group of honing stone retainers is located outside bore

Abstract: The method involves driving a honing tool (1) in such a position in a bore of the work piece that one group of honing stone retainers (10) is located in the bore and the other group of honing stone retainers (20) is located outside the bore. The honing tool performs the honing operation by simultaneous rotational and reciprocating motion of the honing tool and after that the honing tool is moved in the axial direction. An independent claim is included for a honing tool for honing the inner surface of a drilling.

A New Technology of Improving Surface Quality of Engine Cylinder

Abstract: This paper introduces the new technology of ultrasonic vibration honing, and analyzes the cutting principle of ultrasonic honing in terms of cutting motion, grain performance and cutting quantity. Then, the applied effect used in the cast-iron cylinder of DY90 is introduced. The principle and the structure of this device are discussed. This new technology can further be used in micro-car’s cylinder, can provides a high-productivity, high-quality for cast-iron cylinder.