Oversizing Thread Diagnosis in Tapping Operation

Abstract

Automotive, railway and aerospace sectors require a high level of quality on the thread profiles in their manufacturing systems knowing that the tapping process is a complex manufacturing process and the last operation in a manufacturing cell. Therefore, a multivariate statistical process control chart, for each tap, is presented based on the principal components of the torque signal directly measured from spindle motor drive to diagnosis the thread profile quality. This on-line multivariate control chart has implemented an alarm to avoid defected screw threads (oversized). Therefore, it could work automatically without any operator intervention assessing the thread quality and the safety is guaranteed during the tapping process.

Identification of the Production of Small Holes and Threads Using Progressive Technologies in Austenite Stainless Steel 1.4301

“…As numerous authors in the field of engineering have noted, designers and production engineers frequently face the challenge of producing highly durable connections capable of facilitating the assembly and disassembly of components made of various materials. To fulfil this task, fasteners and internal threads represent the prevailing choices, as references [1,2] indicate. Threaded connections are one of the most prevalent solutions for assembling mechanical components because they result in assemblies with high strength and stiffness, as substantiated by references [1,3].…”

“…To fulfil this task, fasteners and internal threads represent the prevailing choices, as references [1,2] indicate. Threaded connections are one of the most prevalent solutions for assembling mechanical components because they result in assemblies with high strength and stiffness, as substantiated by references [1,3]. While screw connections find applications in technical structures, it is worth emphasizing that a substantial proportion of mechanical, aerospace, medical, and dental products incorporate at least one threaded component, as documented in references [4][5][6].…”

“…An integrated thread is produced by a single, complete thread-cutting process [12]. The requirements of thread cutting are high, primarily due to the critical need for precise synchronization between the rotational and vertical movements [1].…”