Among the processes for making final products using fibers, the final process can be called a sewing process. The sewing process generally corresponds to the process that requires the most manpower in the production of textile products. The cost of sewing has gradually increased due to the recent rise in labor costs. The automation of the sewing process and the smart factory are expected to be carried out along with the fourth industrial revolution. In order to make the sewing factories smart, it is essential to apply smart sensing technology to the sewing machines. Also, sewing Process In order to grasp real-time situation, a system to monitor the status of each machine is needed. This study can be regarded as a part of technology development for automation and unmanned sewing process for final CPS(cyber-physical system) implementation. Three techniques have been developed in the sewing machine modification technology to assist the smarting and sewing process of the sewing machine. Three kinds of developed technology are a bobbin remaining amount detecting technique, stitch length control, and monitoring techniques. As a result of step-by-step technology development to realize CPS finally, it is a partial technology development of automation through some modification of sewing machine. The developed technology is expected to be used as a technology for future smart sewing automation plant construction
shows the configuration of under-thread residual sensing and display system. Each component of the test apparatus for the detection of the residual thread volume consists of the lower part of the sewing machine and the display part. Under-thread residual sensing device was designed and implemented as primary and secondary sensing parts. The primary sensing uses a cylinder (CXSM630) for the bobbin and a SMAT-8M sensor for the FESTO position transmitter.[9] The system is implemented so that the remaining amount of the bottom thread can be calculated by the data that the cylinder pin advances and senses the distance gap.
It is a study to apply smart factory to the textile industry in this research and development. A study on the smartization of sewing process among several textile streams was conducted.[12-13] In order to make the sewing machine smart, we applied the same sewing machine which is used in the present industrial field and modified the sewing machine. First, the residual amount of the under-thread was detected to reduce the worker’s mistake and product defect. Secondly, in the sewing industry where workers are aging, it is possible to control the automatic stitch number according to the product type. Next, monitoring of the overall sewing process requires further work on the presser foot pressure control, tension control, POP(point of production) system and all monitoring data interlocks.
flow of information obtained from the parts(under-thread residual detection device, automatic stitch control device, monitoring system) developed for the sewing process smartization. The collected information is displayed in the monitoring system, and it is transmitted to the POP system, the PDM system and the final customer-linked system, so that the sewing process can be made smart
