| 摘要 |
PROBLEM TO BE SOLVED: To provide a pushing broach capable of performing stable pushing broaching improved in the shape of a machining face without causing deterioration of the shape of the machining face due to biting of cutting chips, in pushing broaching capable of making the shape highly accurate with requiring a short machining time. SOLUTION: This pushing broach has a broach cutting blade 2 of only one blade having spline cutting blades 8 having the number of teeth which is the same or a small number of the number of spline holes 7 of a workpiece 4 formed at a distal end in advance, performing cutting at the time of the pushing broaching and performing burnishing at the time of a return, front part guide part 3 and rear part guide part 14 having guide splines 18 partially formed on outer peripheries to be separated from the broach cutting blade 2 in a shaft direction, to be matched with the spline holes 7 in the shaft direction in the front and rear parts and to have slightly smaller outer diameters than that of the broach cutting blade 2 and having parts 16 partially formed with no guide splines as each of transparent parts 16, and a shank 5 on a rear side of the rear part guide part 14. COPYRIGHT: (C)2007,JPO&INPIT
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