MANUFACTURING METHOD OF WIPER DRIVING SHAFT OF HOLLOW TYPE AND WIPER DRIVING SHAFT USING THE SAME FOR IMPROVING STRENGTH OF THE PRODUCT

摘要

PURPOSE: A manufacturing method of a wiper driving shaft is provided to prevent crack of the product, and to improve strength of the product. CONSTITUTION: A pipe of metal material is cut in a certain length(S10). A swage process is carried out to an outer edge surface of one end of the pipe to reduce outer and inner diameter of the end(S20). A nozzle connecting screw is formed in the reduced outer edge of the pipe(S30).