A standard geometry of an ISO profile, M (metric) profile, with 60° symmetric threads is shown in Fig. 1.4. In Fig. 1.4D(d) is the basic major diameter of an internal (external) thread, D1(d1) is the basic minor diameter of an internal (external) thread, D2(d2) is the basic...
The minor-diameter ultrathin washer processing method includes two steps including outer circle punching and drilling. In the punching step, washers are only subjected to shape punching but not to hole punching, the washers after shape punching are drilled by the drilling tool. The drilling tool ...
Processing Technic Study of Deep Blind Hole with Minor Diameter Zhong Shihong Zheng Li Xu Qiang Li Mingxi He Wei Xi’an Changfeng Research Institute of Mechanism and Electricity Abstract: This study indicates the problems of the process route by analyzing processing technic of existing confined ...
The invention discloses a cantilever type minor-diameter hole drilling and tapping device. A drilling and tapping power head is hinged to the right end of an upper cross rod and the right end of a lower cross rod. The left end of the upper cross rod and the left end of the lower ...
PROBLEM TO BE SOLVED: To spread tolerance of a screw prepared hole diameter in the case of performing internal thread work by using a cold forming tap, effectively prevent internal thread dimensional inferiority and breaking of the tap.WATABE MASAAKI...
PROBLEM TO BE SOLVED: To spread tolerance of a screw prepared hole diameter in the case of performing internal thread work by using a cold forming tap, effectively prevent internal thread dimensional inferiority and breaking of the tap. ;SOLUTION: A cold forming tap is provided, in a screw ...