Honing

About: Honing is a research topic. Over the lifetime, 3530 publications have been published within this topic receiving 17491 citations.

An accurate and robust method for the honing angle evaluation of cylinder liner surface using machine vision

Abstract: This paper presents a machine vision-based method for evaluating honing angle of cylinder liners by exploring the frequency domain characteristics of cylinder liner images. An image-processing algorithm based on Fourier transform and Hough transform is developed and applied on images containing the honing texture patterns captured from 14 cylinder liners manufactured with varying honing angles. The images are captured from cylinder liner surfaces by destructive and non-destructive manner using a charge-coupled device camera attached with magnifying lenses and a miniature microscopic probe respectively.A graphical user interface-based program and protractor-based manual method are used for verifying the accuracy and consistency of the developed image-processing algorithm for automatically evaluating the honing angle from the captured images of cylinder liner surfaces. The results clearly demonstrate the efficacy of the proposed method for robustly evaluating the honing angle and it can be used by the cylinder liner manufactures for fast and accurate measurement of honing angle with a resolution of 1°.

Honing method and honing tool

Abstract: In a honing method for machining the internal surface of a bore in a workpiece with the aid of at least one honing operation, during a honing operation, an expandable honing tool is moved up and down within the bore in order to produce a reciprocating movement in the axial direction of the bore and at the same time is rotated in order to produce a rotational movement combined with the reciprocating movement. In the process, a bottle-shaped bore is produced, said bore having, following a bore inlet, a first bore section with a first diameter, a second bore section with a second diameter, which is larger than the first diameter, away from the bore inlet, and a transition section with a continuous transition from the first to the second diameter between the first and the second bore section. During at least one honing operation, use is made here of an annular tool ( 200 ) which has at least one annular cutting group ( 220 ) having a plurality of radially infeedable cutting material bodies which are distributed around the circumference of a tool body and are designed as honing segments which are wide in the circumferential direction and are narrow in the axial direction, wherein an axial length of the honing segments, as measured in the axial direction, is smaller than the width measured in the circumferential direction, and the axial length of the cutting region equipped with cutting material bodies is smaller than the effective outside diameter of the honing tool. The method is particularly suitable for honing cylinder faces during the production of cylinder blocks or cylinder liners for reciprocating piston engines.

Analysis of surface roughness and out-of-roundness in the electro-chemical honing of internal cylinders

Abstract: Hybrid machining processes (HMPs) are gaining considerable attention from the manufacturing community in order to meet the challenges of stringent surface quality and tolerance requirements, often coupled with high production rates. This paper presents the experimental findings on the effects of key process parameters in controlling the surface micro-profile and correcting out-of-roundness (OR) in the electro-chemical honing (ECH) of internal cylinders. The results indicate that the current intensity, electrolyte concentration, segment out-pressure and segment grit size are the major contributing factors. A nano-finished surface featured with high uniformity of roughness values can be generated with precisely controlled out-of-roundness if a distinct co-ordination of electrolytic dissolution and mechanical abrading is achieved in ECH. Some key features of the indigenously developed ECH setup are also highlighted.

Apparatus for holding workpieces during lapping, honing, and polishing

Abstract: The present invention relates generally to a device used to process workpieces. In particular, the invention relates to a carrier (180) that is used to support a workpiece during workpiece honing, grinding, or polishing. The carrier (180) includes a rigid core (210) coated with a fiber-free, scratch-resistant material (230) to prevent scratching of workpieces disposed in the carrier (180). An adhesive layer (220) is typically used to attach the scratch-resistant layer (230) to rigid core. The adhesive film (220) and the scratch-resistant (230) films may be attached to the rigid core (210) by hot pressing.

On Use of Pulsed-Electrochemical Honing to Improve Micro-Geometry of Bevel Gears

Abstract: Accuracy in micro-geometry is an important issue for gears because it affects noise generation and transmission characteristics and consequently determines the operating performance and service life of the gears. Various post-manufacturing processes are required to achieve the desired level of accuracy in micro-geometry of the gears. This paper reports on use of pulsed-electrochemical honing (PECH) process to improve micro-geometry of the straight bevel gears and presents experimental optimization of three important parameters of PECH namely pulse-on time, pulse-off time, and finishing time. Seventeen experiments were conducted according to central composite rotatable approach of response surface methodology. The improvements in micro-geometry of bevel gears in terms of average percentage improvement in single pitch error, adjacent pitch error, cumulative pitch error, and in total runout were found as 34.22%, 39.58%, 13.34%, and 18.88%, respectively. These improvements are better than those achieved using...