May 04, 2011 · This paper explores how a manufacturing process can use a systematic methodology to move towards worldclass quality level. The appliion of the Six Sigma methodology resulted in reduction of defects in the fine grinding process from to %.

After implementation, the data were compiled from the fine grinding process with respect to the defects for one month and the rejection percentage was found to be Hence, as a result of this project, the rejection percentage of the distance pieces at the fine grinding process reduced from to %.

Currently, surface defect detection of stamping grinding flat parts is mainly undertaken through observation by the naked eye. In order to improve the automatic degree of surface defects detection in stamping grinding flat parts, a realtime detection system based on machine vision is designed. Under plane illumination mode, the whole region of the parts is clear and the outline is obvious ...

Aug 09, 2014 · In order to avoid scrap, small faults of the grinding wheel and very small amplitudes of the resulting vibrations are of major interest. This paper presents a new monitoring method, which estimates the defects recursively during the grinding process. Different sensors are analyzed using this method. Among sensors for academic purposes, typical ...

The invention discloses a method for adjusting the metal grinding speed and overcoming defects in the grinding process. In the method, a conductive system is attached to grinding equipment to electrify a grinding liquid; and in the grinding process, the grinding liquid flows through a grinding pad and a wafer needing to be ground to charge the ground metal surface of the wafer and control the ...

This article describes roll defects and presents causes and possible corrective actions. Troubleshooting roll defects Symptom. Possible problem: Recommended action; Body damage. Refers to the body of a roll. Such defects as gouges and cuts are not common, however, they do occur.

Superfinishing will increase the life of a part by decreasing wear and tear. It can also be performed to achieve a tighter tolerance and better sealing capabilities. Superfinishing will allow for a predictable, repeatable surface finish, as it removes any defects left over from the initial milling, turning, or grinding process.

Grinding operations thus contribute greatly to the quality of the finished workpiece. However, problems can often occur during the grinding process. The biggest and most known problem is without doubt grinding burn, which is thermal damage to the rim zone of the part. Grinding burn occurs when too much heat is channelled into the part.

For repair, this defect needs to apply proper welding technique and welding parameter. Simply joint should be a little bit grinding and fill it properly by the same welding process. Misalignment. Misalignment is basically due to join two different or dissimilar thickness also this defect occurs due to carelessness and, This type of defect also called hilow and it is difficult to repair inside ...

Li et al. [,, ] used the MD method to simulate the evolution of subsurface defect in the grinding process of single crystal copper and single crystal silicon materials, discussed the mechanism of material removal in a highspeed grinding state, and simulated the changes of subsurface defects in Ni/Cu multilayers under various cutting ...

Aug 15, 2019 · Now for the 5 most common problems and how to fix them: 1. The workpiece is burnt. Causes and solutions: In the feed too fast Reduce the amount of stock removed per pass. Dressing on the wheel is too fine Use a coarser dressing, more 'open'. Poor coolant direction Adjust the coolant direction into the grinding area.

defects caused by surface integrity, such ... The process of grinding involves the interaction between the grain and bond of the wheel to the workpiece whose properties will affect the output as ...