METHOD AND DIE SET FOR FORMING SAW TEETH (VARIANTS) Russian patent published in 2007 - IPC B23D65/04 

FIELD: machine engineering, namely saw production.

SUBSTANCE: method comprises steps of automatic feed of belt or strip material to press with blanking die set. Blanking die set includes at least one stationary die, basic guiding device for material and punch. Punch together with slide of press performs reciprocation motion relative to die. Blanking die set performs repeating cycle of successive actions: feeding material to die set; orienting material relative to die; blanking recesses for forming teeth in one or both edges of blanked material. Orientation of material relative to die is realized after stopping its feed to die set and before or at beginning recess blanking due to creation of effort for lateral forcing of material to basic guiding device. Die set for performing the method includes lower plate onto which die with end face and cutting edge and basic guiding device are mounted, and punch joined with slide by means of punch holder. Punch has front and back surfaces whose shapes correspond to those of front and back edges of tooth, end plane with cutting edge. End plane of punch with cutting edge is arranged by acute angle relative to end plane with cutting edge of die. Apex of said acute angle at beginning of blanking process is outside or at level of edge of blanked recess.

EFFECT: improved accuracy of teeth along height, lowered energy consumption for moving automatically fed belt or strip material.

20 cl, 12 dwg, 3 ex