Ningbo Zhenming Shaft Co., Ltd. Patent applications |
Patent application number | Title | Published |
20140123821 | Process of manufacturing drive shaft of an explosion-proof motor - A process of manufacturing a drive shaft of an explosion-proof motor, the drive shaft having a cylindrical section and a spline section, the process includes the steps of horizontally disposing the drive shaft; continuously forward moving the drive shaft; feeding both a milling cutter and a correction roller toward the drive shaft wherein the correction roller is coaxial with a shaft of a lathe; activating the milling cutter to mill a front end of the drive shaft; and activating the correction roller to correct any deformations generated by the milling. The correction roller is made of diamond. The cylindrical section has a deformation of less than 0.02 mm per 200 mm of length, and the spline section has a deformation of less than 0.02 mm per 250 mm of length. | 05-08-2014 |
20140123820 | Process of manufacturing a feed screw - A process of manufacturing a feed screw includes the steps of arranging three dies spaced apart 120-degree each other so as to limit a radial movement of an elongated blank feeding through a space defined by the dies; clockwise rotating the dies to cut threads on the blank; performing a thread grinding on the threads of the blank; and cutting the blank into a finished feed screw per predetermined period of time. The blank is fed through a sleeve for positioning prior to the blank feeding. Cylindrical degree of the finished feed screw is less than 0.1 mm/1,000 mm and its pitch error is 0.05 mm/100 threads. | 05-08-2014 |