Spacer nut manufacturing method
AssigneeWatoku Co., Ltd.
InventorsYasuyuki Kadono, Yuji Kadono
Life of this patent
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Abstract
A spacer nut manufacturing method which does not use a NC lathe and which allows machining using existing press working equipment, involves a low parts supply cost, and which helps to achieve a high production efficiency at a low production cost is disclosed. The method of manufacturing a spacer nut arranged between a casing and a board arranged inside the casing and serving to fix the board in position while keeping the board spaced apart from the casing by a predetermined distance dimension is presented.
Claims5
A method of manufacturing a spacer nut arranged between a casing and a board arranged inside the casing and serving to fix the board in position while keeping the board spaced apart from the casing by a predetermined distance dimension, the method comprising:
- a first step of forming a protrusion of a predetermined length on a metal plate material of a predetermined thickness dimension by press working;
- a second step of forging the protrusion into a shaft portion in the form of a bottomed cylinder and forming a flange portion at a peripheral edge of a proximal end portion of the shaft portion by press working;
- a third step of forming an opening at a distal end portion of the shaft portion by press working;
- a fourth step of performing pressing radially inwards on the proximal end portion of the shaft portion to form a groove portion extending circumferentially around the shaft portion;
- a fifth step of stamping the flange portion from the metal plate material while forming a serration portion along an outer periphery of the flange portion by press working;
- and a sixth step of forming a thread groove portion in an inner peripheral surface portion of the shaft portion.
Dependencies are inferred from the claim text.