Showing papers on "Honing published in 2004"

Method of Honing Bores

Abstract: In a method for honing a bore having first and second sections sequentially arranged in an axial direction of the bore, wherein the first section is hardened so that the first and second sections have different hardness, a honing tool is radially supported by positioning guides of the honing tool on the second bore section first section is machined with honing stones arranged on the honing tool to remove material from the first section. During machining of the first section, the honing tool is expanded by feeding the honing stones according to a defined feeding mode against a surface of the first section by a force-guided electro-mechanical advancement. During machining of the first section, the working stroke of the honing tool is adjusted continuously at least toward the end of the honing process. Feeding of the guides is realized independently of feeding of the honing stones.

Honing guide assembly

Abstract: A honing guide and bevel setting jig (30,40) for removable attachment to the honing guide (20) to properly position the angle and projection of a tool (22) to be sharpened in the jig to enable the tool to be honed at the proper angle and position. An adjustable roller (42) that contacts an abrasive surface (44) during use of the guide facilitates formation of micro bevels. A tool securing bar (34) having a generally triangular shape in the bar's middle section forces the arris-defining back of the tool being honed against a reference surface (24) in the guide by tightening thumb nuts (36) around threaded studs (38) projecting from the bar. Jigs for use with both square and skew edge chisel and blades are described. A concave surface clamp bar (1012) honing guide provides enhanced gripping of the tool being honed, and wedges (200) and adjustable structures expand the range of bevel angles that can be honed.

Polishing method for inner surface of tubular brittle material and tubular brittle material obtained by polishing method

Abstract: An object of the present invention is to provide a polishing method for producing, in a relatively short period of time, a tubular brittle material having an inner surface of high surface precision with a maximum roughness Rmax of 01 µm or smaller and a center line average roughness Ra of 001 µm or smaller, and to provide a tubular brittle material with high precision using said polishing method The polishing method according to the invention is characterized by that the inner surface of the tubular material being pre-cut into a tubular shape using a honing machine is further polished with a sheet material having diamond abrasives attached thereon Also claimed is a tubular brittle material obtained by said polishing method

Device for the precision working of planar surfaces

Abstract: A device for the precision working of planar surfaces, in particular for the plane finishing, has a tool ( 13 ), which has an outer and an inner operating surface ( 36, 44 ). These are designed like cup wheels, which fit into one another, and are rotatable together, however, can be axially fed independent of one another. This is done with respect to the outer operating surface ( 36 ) by means of the spindle drive of a honing machine, which is preferably designed as a linear motor, whereas the inner operating surface ( 44 ) is fed through the feed drive ( 28 ) of the honing machine, which feed drive extends inside of the spindle and of the tool.

Machine tool with fluid actuated helical adjustment of abrasive elements

Abstract: The application describes a honing tool for use with a CNC machine. A fluid actuator provides the mechanism for causing radial adjustment of abrasive elements. The actuator consists of a piston and cylinder assembly mounted within the tool and powered by the through the tool cooling fluid of the CNC machine. Actuation motion is driven by a helical drive on the piston which imparts rotary motion to a feed rod. Upper and lower feed rod sections are connected through a clutch. Axial movement is imparted to feed cone by threaded engagement between feed cone and lower feed rod.

Method of honing inner peripheral surface of cylinder bore and device of honing inner peripheral surface of cylinder bore

Abstract: PROBLEM TO BE SOLVED: To provide a method of honing capable of assuring roundness of a cylinder bore even when load due to bolt fastening is added to a cylinder block when a cylinder head is fixed by bolt fastening through a cylinder head gasket along a peripheral edge of the cylinder bore on the cylinder block having the cylinder bore, and also to provide a device of honing. SOLUTION: A dummy head 41 is mounted on an upper deck 19 of an inner peripheral block 12 for mounting a cylinder liner part 24 on a pedestal 33 to allow a protruded pushing part 46 to abut on the peripheral edge part of the cylinder bore 11. The dummy head 41 is fastened to the inner peripheral block 12 with a bolt 16 and an external peripheral surface 25 of the cylinder liner part 24 is brought into contact with a support surface 40 by a piston 38 of a hydraulic cylinder 34 to be pressed inward in a radial direction. In this state an inner peripheral surface 11a of the cylinder bore 11 is honed in a perfect circle shape with a grinding tool 49. COPYRIGHT: (C)2005,JPO&NCIPI

Cylinder block for internal combustion engine and its machining method

Abstract: PROBLEM TO BE SOLVED: To manufacture a cylinder bore controlling the decrease in circularity even during the operation of an internal combustion engine SOLUTION: This method of machining a cylinder block for the internal combustion engine comprises heating the cylinder block up to a preset temperature and then applying honing work for the cylinder bore The circularity of the cylinder bore is secured in the state of the cylinder block being thermally expanded, thereby the circularity of the cylinder bore is greatly improved during actually operating the internal combustion engine COPYRIGHT: (C)2004,JPO

Honing machine and honing method

Abstract: PROBLEM TO BE SOLVED: To provide a honing machine of a one-path system, which carries out the honing of an inner peripheral surface of a workpiece with high efficiency while ensuring high accuracy, and has a small and simple structure. SOLUTION: The honing machine of the one-path system carries out the honing of the inner peripheral surface Wa of the workpiece W by axially feeding a rod-like honing tool 1 under rotational motion, into the inner peripheral surface Wa. A spindle feeding driving section 4 for feeding a rotating spindle 2 having the honing tool 1 attached to the tip thereof, also has an oscillation function, i.e. a function of simultaneously applying axial fine oscillations in a superimposing manner to fundamental feeding motion of the honing tool 1. COPYRIGHT: (C)2004,JPO&NCIPI

Evaluation device for inner circumferential face of engine bore

Abstract: PROBLEM TO BE SOLVED: To provide a technique for evaluating smooth condition in an engine bore inner circumferential face, hardly affected by brightness fluctuations SOLUTION: The inner circumferential face 110 of the engine bore 100 is image-picked up by an imaging part 10 to generate an analytical image 200 of an evaluation object A power spectrum calculating part 32 applies two-dimensional Fourier transform to the analytical image 200 to generate a power spectrum image 210 for showing the distribution of power values with respect to respective two-dimensional space frequencies A determination part 34 calculates a ratio with respect to all the picture elements of which the value is substantially zero, in the power spectrum image 210 The ratio is reduced when fine unevenness exists in large number in a honing mesh or the like The ratio is compared with a threshold determined by an experiment to determine thereby the quality of the smooth condition on the face after a honing work COPYRIGHT: (C)2004,JPO

Simulation of Machined Surface Formation While Honing

Abstract: The dynamics of deep hole honing is considered. The mathematical model of the process including the dynamic model of the tool and the interaction of the workpiece surface and honing sticks is analyzed. The honing tool is modeled as a continuous slender beam with a honing mandrel attached at the intermediate cross section. A single row of stones tool rotates and has reciprocational motion in the axial direction. The honing stones are expanded to the machined surface by a special rigid mechanism that provides cutting of workpiece cylindrical surface. The removal of chip and the tool vibrations cause the variation of expansion pressure and depend on the surface state formed by previous honing stone. The equations of new surface formation are separated as a specific set of the dynamic model. These equations inherently consider the regenerative effect of oscillations during machining. The numerical algorithm of machined surface generation has been developed which facilitates the 3D graphical representation and evaluation of the topography of the generated surface. The simulation model accounts for not only the nominal tool motion but also takes into account errors during machining such as tool components deformations and vibrations, tool runout, as well as initial surface distortions produced by previous operation. Based on the surface formation model software for evaluation of typical surface quality and accuracy criteria such as eccentricity, out-of-round, conicity, barrel, axial waviness, misalignment, faceting has been developed. The expansion pressure, tool stiffness, and technology conditions are considered as varying parameters since their influence on the process are different. The process productivity and accuracy can be improved by choosing rational conditions evaluated by simulation. The corresponding models and results of numerical simulation are presented. All the results are given in dimensionless form and therefore they are applicable to a wide range of real manufacturing process conditions. The model of new surface formation presented allows the simulation of the machined surface topography variation in time and to predict workpiece accuracy and possible correction of surface errors.Copyright © 2004 by ASME

Process for honing an inner surface of a bore in a workpiece, especially in a connecting rod, using a honing tool comprises compressing the workpiece in the region of the bore perpendicular to the bore axis to deform the bore cross-section

Abstract: Process for honing an inner surface of a bore in a workpiece (13), especially in a connecting rod, using a honing tool (16) comprises compressing the workpiece in the region of the bore perpendicular to the bore axis (40) with a clamping force sufficient to deform the bore cross-section. The inner surface of the bore is finely machined in the compressed state using the honing tool to produce a circular bore cross-section. The clamping force is removed to release the compressed region of the bore to obtain a bore with an oval cross-section in an unloaded workpiece. Independent claims are also included for: (1) Device for honing an inner surface of a bore in a workpiece, especially in a connecting rod; and (2) Connecting rod comprising a connecting rod bar (19) and at least one connecting rod eye (17, 18) with a bore.

Honing process for workpiece, involves grinding stages between inner peripheral sections of workpiece having different internal diameters using honing tool to form conical internal perimeter areas between inner peripheral sections

Abstract: The honing process involves grinding the stages (54) between the inner peripheral sections (50,52) of the workpiece having different internal diameters using a honing tool (32') to form conical internal perimeter areas between the inner peripheral sections. The honing tool includes grinding blades (60) having tapered grinding surfaces. An independent claim is also included for a honing machine.

Operating method for whetstone diameter expanding/contracting member of honing machine, and honing machine

Abstract: PROBLEM TO BE SOLVED: To provide an operating device for a whetstone diameter expanding/contracting member of a honing machine capable of feeding a whetstone member in the radial direction certainly for a certain specified amount. SOLUTION: The honing machine includes a honing head structured so that a whetstone mounting plate whereto a whetstone is fixed in a whetstone mounting hole formed in the circumferential direction is held movably in the radial direction and a rod 12 having a pushout part in a tapered shape is lowered by a feed motor 48 to move the whetstone in the radial direction. Also the honing machine includes an NC device 71 equipped with an arithmetic operation control part 78 to control integrally the drive of the feed motor 48 etc. The arithmetic operation control part 78 sets the target position of the rod 12 on the basis of the specified feed amount of the whetstone 26, and when the head rises relative to the hole to be processed, moves the rod 12 when the movement target position of the rod 12 shifted (corrected) downward for a portion corresponding to the play (gap) in the vertical direction of the whetstone mounting plate 24 in the whetstone mounting hole is used as the final target position. COPYRIGHT: (C)2004,JPO

Functional Characterization of Surface Roughness Generated by Plateau Honing Process Using Wavelet Analysis

Abstract: Plateau honing is being widely used in the production of cylinder bores to produce a surface to achieve the required functional performance. Characterizing plateau-honed surface irregularity into functional components is helpful for process control and functional analysis. The application of wavelet transform to characterize plateau-honed surface is presented. Difficulty exists in quantitatively determining the zooming level for functional characterizing the multi-process produced surfaces. In this paper, we utilize probability plot of bearing ratio curve, to quantify the zooming level of wavelet transform to obtain the functional components which related to different functional aspects from plateau honed surfaces. The effectiveness of this method is demonstrated.

Adjustable, metering honing reaming head

Abstract: The utility model relates to a honing head, in particular an adjustable and metering honing reaming head; the honing reaming head includes a grinder head, a whetstone seat, a whetstone; the device is characterized in that the outer circle of the grinder head is fixed and provided with a plurality of strip-shaped guide bar in the axial direction; the honing head between the adjacent guide bars is provided with the long groove hole; the long groove hole is provided with the whetstone seat which can move in the radial direction; the outer side of the whetstone seat is fixed with the whetstone; the inner side of the whetstone closely contacts the adjustable taper-shaped cone in the grinder head; one end of the adjustable taper-shaped cone is connected with the slightly adjustable element arranged at the back of the grinder head; the head part of the grinder head is provided with a ring-shaped front guide part with a heave In the utility model, the positioning device and the slightly adjustable element are arranged on the grinder head; thus the utility model can ensure the limited fluctuation and the micro adjustment of the size of the grinder head in the prescribed scope The utility model is particularly suitable for the finish machining of the non-continuous hole which highly requires the accuracy of the size and the position

Method of machining inner peripheral surface of circular hole

Abstract: PROBLEM TO BE SOLVED: To provide a method of machining the inner peripheral surface of a circular hole, uniformly removing swells formed at the edges of recesses in forming fine recesses on the inner peripheral surface of the circular hole of a workpiece. SOLUTION: Honing is performed as pre-machining to the inner peripheral surface of a cylinder bore, and then the fine recesses are formed on the inner peripheral surface of the cylinder bore. Honing is then performed as post-machining to the inner peripheral surface of the cylinder bore to approximate the circle form of each cylinder bore after honing before and after forming the recesses. Machining allowance by honing of post-machining is made uniform over the whole periphery of the cylinder bore to uniformly remove the swells formed at the edges of the recesses. COPYRIGHT: (C)2006,JPO&NCIPI

Study on New Manufacturing Process of Gear-Honing-Tool for Hardened Gear

Abstract: Honing technique is more and more widely used as finished machining method of high efficiency for hardened gear. To date, the manufacturing process of CBN gear-honing-tool is conventional electroplating CBN technique of plating on the matrix of cutting tool. Although this technique is feasible, there are still some problems such as uniformity of planting abrasives and its equal height, which have not been properly solved. Especially, the issue of binding force between CBN composite deposit and matrix that seriously affects the cutting life is still unsettled. This paper carried out deep research into these problems and made CBN composite deposit and the matrix reach “half metallurgy melt” combination. Therefore we had successfully solved the problems of cutting life.

Diameter altering honing knife

Abstract: The utility model relates to a diameter altering honing knife for the machining workpiece inside diameter, wherein, a guide groove is arranged on the front end of a tool bar 1 with a common straight shank or a taper shank along the axial direction of the tool shank, a regulating mass and a whetstone are embedded in the guide groove, and the whetstone can do radial movement by adjusting the position of a mandrel. The utility model can be used on various machine tools and can be provided with a plurality of guide grooves according to the diameter of machined elements, i.e. a plurality of regulating masses and honing whetstones. Therefore, the surface finish quality of the inside diameter is improved up to more than 0.4; the cooperation of the regulating mass and mandrel makes the honing whetstone do the radial movement along the tool shank in the guide groove to machine inside hole surface with different sizes. With strong commonality, low cost and convenient machining, the utility model is suitable for the honing of inside circle with coarse inner face and the diameter ranging from 10-400 mm, the diameter altering of a single-tool up to 40mm.

Research on the Cutting Principle of New Non-Conventional Technology —— Efficiency Ultrasonic Honing

Abstract: In recent years, a new non-conventional technology--efficiency ultrasonic honing was researched, the new technology of efficiency ultrasonic vibration cutting has been drawing general attention. And great advancement in applications in production of the technology have been achieved. The paper accounts first briefly the technological effect of efficiency ultrasonic vibration honing and then analyzes the cutting principle of efficiency ultrasonic honing in terms of cutting motion, grain performance and cutting quantity. At last, the paper introduce the conclusion: Efficiency ultrasonic honing sharpens grain, which is favorable for raising cutting efficiency; Oilstone in efficiency ultrasonic honing has strong autogenous grinding, which makes air cavity not easy to plug and leads to high productive efficiency and small variation in workpiece’s surface form; Efficiency ultrasonic vibration honing may increase honing depth and raise cutting efficiency. It may also decrease honing power and system deformation; In efficiency ultrasonic vibration honing, because HF (High Frequency) vibration raises the practical cutting rate and affects cutting scraps with dynamic impact force, strong wavefront shearing stress is obtained, which is favorable for cutting and raising surface quality. Introduction In recent years, the new technology of efficiency ultrasonic vibration cutting has been drawing general attention. And great advancement in theory and applications in production of the technology have been achieved [1]. Efficiency ultrasonic vibration honing system has developed in North China Institute of Technology and Nanjing University of Aeronautics and Astronautics of cast iron cylinder ( 52 mm-97 mm) and thin cylinder of 20# ( 150 mm-275 mm) has been successfully applied to productive experiment and the technological effect obtained is ideal [2]. In comparison with ordinary honing, ultrasonic vibration honing possesses apparent characteristics: Firstly, it has high processing precision (precision in size ranks IT 6, roughness Ra 0.05, circularty and cylindericity in size ranks IT 6 ); Secondly, it has small cutting force and low temperature so that no deformation occurs; Thirdly, it has high efficiency. Thus in the following pages, the author looks further into efficiency ultrasonic honing cutting principle. Working Principle of Efficiency Ultrasonic Honing Ultrasonic honing system is an electromechanical production. It is made up of ultrasonic generator, ultrasonic honing equipment and frequency counter. Ultrasonic honing equipment consists of transducer, horn, tool vibrating system and machine shell (Fig.1). It is installed on the spindle of vertical honing machine. Honing movement including rotation, moving up and down and ultrasonic vibration is brought about. It is the main part in the cause of pulse cutting transducer: It converted ultrasonic frequency vibrating information which ultrasonic generator generated into ultrasonic frequency mechanical vibration. There are two kinds of them: one is magnetostriction transducer, the other is piezoresistive transducer [3]. This system adopted longitudinal piezoresistive transducer. The advantage is high utilization ratio, small volume and light weight. Horn: Also called ultrasonic Key Engineering Materials Online: 2004-03-15 ISSN: 1662-9795, Vols. 259-260, pp 640-643 doi:10.4028/www.scientific.net/KEM.259-260.640 © 2004 Trans Tech Publications Ltd, Switzerland All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of Trans Tech Publications Ltd, www.scientific.net. (Semanticscholar.org-13/03/20,19:03:49) Journal Title and Volume Number (to be inserted by the publisher) 641 amplifying pole. The main function is gathering energy and efficiently transfer energy to loading. As a converter of mechanical impedance, it also make impedance matching between transducer and acoustic loading. That is to say, it will amplify high-frequency mechanical vibrating displacement or velocity’s vibrating amplitude. Tool vibrating system: As honing system’s main loading of acoustic impedance, it finished honing cutting and decided system frequency. Its constructive size is in charge of apertures and length of workpieces. Machine shell: Its function is assembling and fixed, force, transmitting . Fig.1 The composition of the efficiency ultrasonic honing system Ultrasonic frequency electronic vibration which has been generated by ultrasonic generator is converted into ultrasonic frequency mechanical vibration through transducer. After amplifying, longitudinal vibrating amplitude is transferred to vibrating disk by horn. Flexible pole received curved vibration from vibrating disk, and converted it into axial longitudinal vibration, then transferred it to oilstone base. Oilstone base vibrated with oilstone as same frequency in honing head. In the cause of honing. the honing head did not vibrate, only tool vibrating system vibrated. So comparing with the system which honing head also vibrated, it is has less energy loss . Theoretical Analyses According to literature [4], the said efficiency ultrasonic vibration honing device does not change processing principles of the ordinary honing, but based on its motion, yields ultrasonic vibration with oilstone and then forms pulse honing. In relation to the direction of workpiece’s central line, ultrasonic vibration is divided into three directions: axial vibration, radial vibration, and tangent vibration. Here, the axial vibration is taken as an example for analysis (as Fig.2 and Fig.3). Fig.2 Motion analysis of ultrasonic vibration honing Fig.3 Motion velocity of oilstone Supposing the vibration of oilstone is in the form of sine wave Asin2 ft (A is the amplitude of oilstone and f is ultrasonic frequency), rotation rate of oilstone, in relation to workpiece is n, inside diameter of workpiece is D and feed velocity of oilstone is Vj, resultant cutting velocity of ultrasonic vibration honing is Va. Key Engineering Materials Vols. 259-260 641

Joining process for several parts of piece of furniture involves inserting, positioning, moving press between two positions, pressing and repeating these operations

Abstract: The fine hardening process for several gear wheels (4) involves using correcting and non-correcting tools, e.g. honing tools. Several of the gear wheels for hardening are clamped axially one behind the other on a common workpiece rotation axis (5) and are hardened by a tool (1) simultaneously. The gear wheels can be arranged in a hollow wheel, like planetary gears.

Honing method and honing machine

Abstract: PROBLEM TO BE SOLVED: To provide one-pass type honing technology capable of highly efficiently implementing honing work on the internal surface of a work while maintaining high finish precision on that surface. SOLUTION: In one-pass type honing technology, honing work is executed on the internal surface Wa of the work W by a reciprocating movement of the honing tool 1 toward the axial line of the internal diameter face Wa, while revolving the bar-shaped honing tool 1. An actual honing work by means of the honing tool 1 is implemented during the two-way movement of the honing tool 1, namely forgoing stroke and the return stroke of the honing tool; and at least during the actual work at the forgoing stroke of the honing tool 1, the honing tool 1 is moved along the internal surface Wa of the work W while it is vibrated toward the axial lines. The honing work is attained in this way. COPYRIGHT: (C)2006,JPO&NCIPI

Research on Ultrasonic Honing Performance of ZrO2 Engineering Ceramics Using Diamond Oil-Stone with Coarse Grains

Abstract: The experiments of common and ultrasonic honing ZrO2 engineering ceramics using diamond oil-stone with coarse grains were carried out in this paper. The influences of grinding depth and rotative velocity of principal axis on surface reduction ratio, temperature of grinding zone, grinding force and surface roughness were clarified. The transformation characteristic from ductile region to fragmenting region, temperature characteristic of grinding zone, grinding force characteristic and the quality of machined surface in two kinds of honing modes were further studied. The research results indicate that ultrasonic honing not only possesses wider ductile grinding region, lower temperature of grinding zone and smaller grinding force but also can obtain higher surface quality compared with common honing. Introduction For its well-known physical and mechanical properties and wide applying foreground in the fields of war industry, aeronautics and astronautics and precision medical engineering, engineering ceramics is recognized as one of the most important materials in the 21 st century. But the high rigidity and brittleness of engineering ceramics make it difficult to machine. Furthermore, some micro fragments and micro crackles are easy to generate in the surface layer and subsurface layer, so it is difficult to ensure the reliability of engineering ceramics parts. Therefore, how to improve machining efficiency and machining quality of hard and brittle materials, e.g. engineering ceramics, has become the research emphasis recently. It is reported that there are lots of overseas and domestic scientists going in for such researches [1-2]. But those researches are all under the condition of adopting superfine abrasive grains. Recently, Japanese scholars carried out the study of high efficient ductile grinding using diamond wheel with coarse grains at a minute feed and the surface characteristics were gained [3]. Besides, it hasn’t yet been reported whether coarse grains can grind hard brittle material in ductile region with high efficiency if using other machining methods, such as ultrasonic vibration machining method, which has been proved to be very effective for hard and brittle materials machining. In this paper, some contrast experiments of common and ultrasonic honing were carried out, and the performance of honing ZrO2 engineering ceramics using diamond oil-stone of 140 # grit was researched. Experimental Conditions and Methods The experiments were carried out on self-designed CSW-2 single axis horizontal ultrasonic honing machine and the diamond oil-stones were trimmed on M1432W common circular grinding machine. Experimental conditions are shown in Table 1. In order to research roundly the honing performance of ZrO2 engineering ceramics, the machined surfaces under different cutting parameters were observed by Hitachi S520 SEM, temperature of grinding zone was measured with standard Pt&Rh-Pt artificial thermocouple, grinding force was measured with strain foil by YD21 dynamic strain measuring instrument and recorded on B&K 2-channel recorder, and the roughness of machined surface was measured with JJ1-B stylus surfagauge. Key Engineering Materials Online: 2004-03-15 ISSN: 1662-9795, Vols. 259-260, pp 297-301 doi:10.4028/www.scientific.net/KEM.259-260.297 © 2004 Trans Tech Publications Ltd, Switzerland All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of Trans Tech Publications Ltd, www.scientific.net. (Semanticscholar.org-13/03/20,19:03:40) 298 Advances in Grinding and Abrasive Processes Table 1 Experimental conditions Trimming wheel Resin-bonded Si3N4 wheel; Grit Size140# ; Dimension(Do×B×Di): 203 mm×40 mm× 120 mm Trimming condition Trimming wheel’s speed: Vs=28 m/s; Rotative velocity of workpiece: nw=37 r/min; Reciprocating velocity of workpiece: VT=600 mm/min Workpiece Material:ZrO2 engineering ceramics (hot isostatic pressing); Dimension (Do×B×Di): 89 mm×24 mm× 74 mm Diamond oil-stone Bronze-bonded oil-stone; Grit Size: #140; Concentration: 100%; Dimension (L×B×H): 100 mm×12 mm×10 mm Honing parameter Rotating velocity of principal axis: n=(75~290) r/min; Reciprocating speed of honing head: Vf=1.26 m/min; Cutting depth: ap=1 μm, 2 μm, 3 μm, 6 μm, 9 μm, 12 μm/reciprocation Ultrasonic vibration parameter Generator power:100 W; Vibration frequency:20.3 KHz; Oil-stone Amplitude: 12 μm-15μm Cooling style Emulsion Experimental Results and Discussion Transformation Characteristic from Ductile Region to Fragmenting Region. Ductile mode grinding, which has been defined in reference [4], means that fragmentized area is less than 10 percent of the whole ground surface. In order to study whether diamond oil-stone with coarse grains can grind engineering ceramics in ductile region and obtain the range of ductile grinding region, the surface characteristic of machined workpiece, especially surface reduction ratio, should be studied firstly. The relationships between cutting depth and surface reduction ratio at different rotative velocities in common and ultrasonic honing are shown in Fig.1. 2 4 6 8 10 12 0 5 10 15 20 25 n= 60r/min n= 75r/min n=118r/min n=150r/min n=190r/min S u rf a c e r e d u c ti o n r a ti o (% ) Cutting depth a p (μm) μ !\" # $ !\" # %& ( ) * + , . / ( ( ) 0 1 , . / ( ( ) 2 2 3 , . / ( ( ) 2 1 + , . / ( ( ) 2 4 + , . / ( a. Common honing b. Ultrasonic honing Fig.1 The relationships between cutting depth and surface reduction ratio at different rotative velocities It can be seen from Fig.1a that in common honing, if ap=1 μm, surface reduction ratio is less than 10%, and the honing lies in ductile region; if 1μm 2 μm, surface reduction ratio is 15%~70%, and the honing enters fragmenting region. As for ultrasonic honing, it can be seen from Fig.1b that under the same conditions, the range of ductile grinding region will be enlarged more. Furthermore, during the ductile region, surface reduction ratio will decrease along with the increase of rotative velocity and the influence of cutting depth on reduction ratio is not obvious. Temperature Characteristic of Grinding Zone. Temperature of grinding zone is an important factor influencing grinding performance of hard and brittle materials, so it is necessary to research the temperature characteristic under two kinds of honing modes. The influence of rotative velocity on the temperature of grinding zone is shown in Fig.2. 298 Advances in Grinding and Abrasive Processes

Honing process for connecting rods involves producing boring with cylindrical middle section and widening end sections using honing tool

Abstract: a The honing process produces a boring (30) with a central section (33) and two end sections (34, 35) with increasing towards the ends. The widening honing tool is moved back and forth parallel to the longitudinal axis (31) of the boring. This produces uniform honing load in the central section and increasing load in the end sections.

Throw-away tip and cutting tool using it

Abstract: PROBLEM TO BE SOLVED: To form a good machined surface on a material to be cut, in which porosity is liable to occur. SOLUTION: This tip 1 has an upper surface 3 opposite to a lower surface serving as a seating surface to form a cutting face and a side surface serving as a flank. In the tip, the ridge side formed by intersecting ridge lines of the upper surface 3 and the respective side surfaces is taken as a main cutting blade, a first auxiliary cutting blade 7 is formed on a part near one corner of each main cutting blade, and a second auxiliary cutting blade 8 is formed on a part near the other corner. The first and second auxiliary cutting blades 7, 8 are provided with a honing surface 9 intersecting the surface of the material W to be cut at an acute angle when being mounted on a tool body. A face milling cutter (a cutting tool) using the tip 1 is mounted on the tool body so that the honing surfaces 9 of the first and second auxiliary cutting blades 7, 8 of the tip 1 intersect the surface of the material W to be cut at an acute angle. COPYRIGHT: (C)2004,JPO

Grinding shaft device of honing machine

Abstract: PROBLEM TO BE SOLVED: To improve working efficiency, by expanding an outer diameter without removing a grinding shaft from a main shaft by eliminating manualoperations controlling the outer diameter by removing the grinding shaft from the main shaft conventionally. SOLUTION: The grinding shaft mounted on the main shaft via a socket member is formed into a hollow form, part of the grinding shaft is formed as a thin wall grinding portion, abrasive grains are electrodeposited on the periphery of the grinding portion and a tapered hole reducing its inside diameter toward an upper side is formed in the inside, and a taper shaft corresponding to the above tapered hole and a lifting means for lifting the taper shaft are provided. Thus, the outside diameter of the grinding portion is expanded by a little bit by lifting up the tapered shaft upward. COPYRIGHT: (C)2004,JPO

Super-precision free abrasive material honing machine

Abstract: An ultra-precision free-abrasive honing machine consists essentially of a machine base 1, a machine frame 2, a main axle and a honing rod 4 and, in structure, is characterized in that the honing rod 4 has a radial abrasive outlet passage 9, the exterior of which communicates with one end of an abrasive inlet pipe 14; the other end of the abrasive inlet pipe 14 connects with an abrasive agitating groove 15, which connects with the machine base 1 via an abrasive reflux pipe 16; the abrasive agitating groove 15 is provided with an agitator 17 and an oil pump 18. The honing rod 4 consists of an abrasive-free honing strip 5, a main honing rod 6 and a conical expansion rod 7, wherein when directing outward, the honing end of the honing strip 5 is used for processing pore diameters; the honing rod 4 consists of an abrasive-free honing strip 5 and a horning-strip fixing sleeve 20, wherein when directing inward, the honing end of the honing strip 5 is used for processing short-axle diameters. The utility model can improve honing precision and production efficiency and reduce using cost; not only free abrasives and polishing agents, but also raw solid abrasive honing strips can be used simultaneously.

Working method of bore inner surface of engine block

Abstract: PROBLEM TO BE SOLVED: To provide a working method of a bore inner surface of an engine block for surely and easily improving working efficiency, and reducing equipment cost with a simple constitution. SOLUTION: A rough boring work process is performed for working an inner surface of a prepared hole B of a bore up to first shape accuracy, and next, while continuously performing cutting work by a working blade tool 3 arranged in a cutting tool 1 by allowing the cutting tool 1 to autorotate, a finishing boring work process is performed for cutting the inner surface of the prepared hole B up to second shape accuracy by revolvingly moving along the inner surface of the prepared hole B in a prescribed diameter, and afterwards, a finishing honing work process is performed for grinding the inner surface of the prepared hole B in desired shape accuracy. When performing the rough boring work process or the finishing boring work process, chamfer work is continuously performed by moving in the shaft direction while gradually changing a revolving moving diameter of the cutting tool 1 by an opening of an end part of the prepared hole B. COPYRIGHT: (C)2004,JPO&NCIPI

High-accuracy semi-automatic horizontal honing machine

Abstract: The utility model relates to a high precision semi-automatic horizontal honing machine, comprising a main shaft device, a honing feeding device, a honing pressure device, an actuating control device which is composed of a measure device and a zero position lock gear and a control circuit. The utility model is characterized in that: the front and back ends of the pushing arm in the main shaft device are arranged in the main shaft through a copper bush device separately; the connection type of a fork inserted to a placket fork slot is adopted by the pushing arm and the pushing arm head, which is characterized in high concentricity and stability; the stroke device is composed of a double guide peg device, a crank link device and a locking device, which is characterized in that the stroke capacity and degree can be adjusted conveniently; the lock/unlock device is composed of a foot treadle device, a driving and locking device and a releasing device, which is characterized in simple and convenient operation; a clamping device which has the advantages of simple structure and convenient operation and manufacture, and a cooling device which is simple, with good impact and free of splashing oil. The utility model has the advantages of compact structure, reasonable distribution, reliable operation, good stability and high precision.