AN INTRODUCTION TO THE PRINCIPLE OF STATISTICAL PROCESS CONTROL IN MANUFACTURING IS PRESENTED. THE NEED FOR MACHINE ASSISTANCE IN MEASUREMENT IS LINKED TO THE BENEFITS OF COMPUTERIZED DATA ANALYSIS. AS A SPECIFIC EXAMPLE, THE LATEST APPROACH TO CAN DOUBLE SEAM ANALYSIS IN SHOWN. ANALYZED FOR SURFACE FINISH AND DIMENSIONAL PRECISION. ALL CONVENTIONAL CASTING PROCESSES HAD DIFFICULTY WITH THE 0.5 DEGREE TAPER ON THE PATTERN. AFTER MUCH DIFFICULTY DRAWING THE PATTERN FROM CONVENTIONAL SAND MOLDS, THE COPE AND DRAG PATTERN TAPER WAS INCREASED TO L DEGREE IN ORDER TO PRODUCE CASTINGS. NONE OF THE CONVENTIONAL SAND CASTING PROCESSES COULD PRODUCE CAST-IN HOLES. EP CASTINGS HAD CAST-IN HOLES, ALMOST ZERO TAPER, CLOSE DIMENSIONAL TOLERANCES, AND A SUPERIOR SURFACE FINISH COMPARED TO CONVENTIONAL SAND CASTINGS.
| Number of Pages : | 14 |
| Published : | 06/01/1990 |
