Screw Machine QC Troubleshooing Algorithm

QC Algorithm Image Automatic Bar Machine operators and machinists find it easy to quickly isolate and cure quality defects with these powerful logic diagrams. By answering yes or no to simple questions, the machinist will branch to the page which lists the most likely cause of the problem and learn what to do to correct it. With these 11 laminated pages, new trainees will use the same thought pattern an expert trouble-shooter uses to isolate and fix problems.

The troubleshooting process begins on page one. Once the type of quality defect is identified, the person is branched to other pages which help to isolate the cause. For example, assume a drilled hole was the source of the defect. Page 1 directs the operator to page 8. On page 8, the person is asked whether the finish of the hole is correct. If it is, they are asked if the problem is with the concentricity of the hole. If concentricity is the problem, they is directed to page 11.

On page 11, the individual is asked whether all of the workpieces have the same concentricity problem. If not, they are directed to another page. If they do, they are asked if any of the 9 most likely causes of this problem are present. Each cause is listed in the the order in which they are most likely to occur. If they find the cause, they are told how to correct it. If none of these potential causes match the situation, the machinist is told to notify their Supervisor rather than attempt something which may make conditions worse.

Problems include: Chatter Marks, Short Feed, Oversize Diameters, Undersize Diameters, Incorrect Hole Depth, Incorrect Hole Diameter, Poor ID finish, Poor OD finish, Incorrect Feature Locations, Non-Concentric Holes, Tips and Burrs.

Free Online Quality Control Troubleshooting Guide