Thread milling cutter
A milling cutter and thread technology, which is applied in the field of thread cutting milling cutters, can solve problems such as chatter vibration, reduction of machining accuracy, and abnormal noise, and achieve the effects of suppressing chatter vibration and excellent machining accuracy
Active Publication Date: 2010-11-10
OSG
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Problems solved by technology
[0004] However, in such a conventional thread cutting milling cutter, since a plurality of cutting edges are arranged at equal intervals around the axis center of the tool with mutually equal constant leads, there is a problem that, when cutting a thread, the The cutting resistance increases and decreases in a certain cycle to generate vibrations, and due to the amplification due to resonance, chattering occurs, and wave-like unevenness occurs on the flanks of the thread, etc., which reduces the machining accuracy or generates abnormal noise. In order to prevent such chattering , had to reduce cutting conditions
Method used
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Embodiment
[0045] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0046] figure 1 It is a figure which shows the thread cutting milling cutter 10 which is one Example of this invention, (a) is a front view seen from the direction perpendicular|vertical to the axis S, (b) is seen from the front end side which is the bottom of (a) (c) is an enlarged view of the IC-IC section in (a), (d) is an enlarged view of the ID-ID section in (a), and is integrally equipped with a machining center in the axial direction. The spindle holds the shank 12 and the blade 14 . On the outer peripheral portion of the blade portion 14, a plurality of cross-sectional shapes and female threads 30 to be formed are arranged at the same pitch P as the female threads 30 in the axial direction (refer to image 3 ) and other thread grooves corresponding to the raised lines without lead, four twisted grooves 16a-16d are set in such a way that the raised li...
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Abstract
Since as illustrated in a developed view of FIG 2, helical flutes (16a, 16c) is differentiated from the lead angle beta of adjoining helical flutes (16b, 16d) around the axis center, the lead angle alpha of cutting edges (20a, 20c) provided along the helical flutes (16a, 16c) is differentiated from the lead angle beta of adjoining cutting edges (20b, 20d) around the axis center, and the interval of the cutting edges (20a-20d) around the axis center S becomes unequal because the interval of the cutting edges (20a-20d) is varied continuously in the axial direction. Since an increase / decrease in cutting resistance becomes irregular when a screw is cut, the occurrence of chatter due to resonance is suppressed and a screw can be cut with excellent machining precision under various machining conditions.
Description
technical field [0001] The present invention relates to a thread cutting mill, and in particular, relates to a thread cutting mill capable of suppressing tool chatter and obtaining excellent machining accuracy. Background technique [0002] A plurality of ridges with no lead are arranged at a certain interval in the axial direction on the outer periphery, and a plurality of grooves are provided in such a way as to intersect with the ridges, thereby dividing into a plurality of facets. A thread cutting mill is known in which one end in the circumferential direction forms a cutting edge along the groove (see Patent Document 1). Therefore, according to such a thread cutting milling cutter, the NC machining center or the like is driven to rotate around the axis, and at the same time, it is caused to revolve relatively with respect to the thread material and is lead-feeded in the axial direction, thereby, it is possible to use a single A tool for cutting male and female threads ...
Claims
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IPC IPC(8): B23G5/18B23C3/00B23C5/10
CPCB23G2200/48B23G5/18B23G2200/40Y10T409/30056Y10T407/172
Inventor 大泽二朗
Owner OSG