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US 4,770,572 AGranted
Press for manufacturing helical gears
AssigneeAmino Iron Works Co., Ltd.
InventorsKiyoyasu Ohkawa, Masao Murakawa
Life of this patent
Estimating the term…
Abstract
A press for manufacturing helical gears having a punch with a cutting edge; a die with a cutting edge, one of the cutting edges being shaped as a helical gear and the other having a shape corresponding to the shape of the one cutting edge; and a bolster rotatable about an axis and provided with one of the die and the punch. The die and said punch are pressed together and the bolster is rotatably driven by a driving element in response to a lead of a helical gear to be manufactured. The stroke of the punch is detected and a desired rotation angle of a driving element is calculated and then signalled to the driving element.
Claims17
A press for manufacturing helical gears comprising:
- a punch (1) with a helically shaped cutting edge (4);
- a die (2) with a helically shaped cutting edge (5, 5a, 5b) corresponding to said cutting edge (4) of said punch (1);
- a rotatable bolster (74) rotatable about an axis and provided with one of said die (2) and said punch (1);
- means (69) for linearly moving one of said punch (1) and said die (2) relative to the other of said punch (1) and said die (2) so as to effect linear movement, said linearly moving means being formed to press said punch and said die together;
- means (85, 86, 88) for rotatably driving said bolster (74) in response to a lead of a helical gear to be manufactured and in synchronism with said linear movement of said one of said punch (1) and said die (2);
- a frame (70) supporting said rotatable bolster (74);
- and
- means for supporting said rotatable bolster (74) on said frame (70) and including bearings (75, 76), said driving means including a servo motor (85).
5 more elements
A press for manufacturing helical gears comprising:
- a punch (1) with a helically shaped cutting edge (4);
- a die (2) with a helically shaped cutting edge (5, 5a, 5b) corresponding to said cutting edge (4) of said punch (1);
- a rotatable bolster (74) rotatable about an axis and provided with one of said die (2) and said punch (1);
- means (69) for linearly moving one of said punch (1) and said die (2) relative to the other of said punch (1) and said die (2) so as to effect linear movement, said linearly moving means being formed to press said punch and said die together;
- means (85, 86, 88) for rotatably driving said bolster (74) in response to a lead of a helical gear to be manufactured and in synchronism with said linear movement of said one of said punch (1) and said die (2);
- a frame (70) supporting said rotatable bolster (74);
- and
- means for supporting said rotatable bolster (74) on said frame (70) and including a hydrostatic pressure mechanism, said driving means including a servo motor (85).
5 more elements
A press for manufacturing helical gears, comprising:
- a punch (1) with a helically shaped cutting edge (4);
- a die (2) with a helically shaped cutting edge (5, 5a, 5b) corresponding to said cutting edge (4) of said punch (1);
- a rotatable bolster (74) rotatable about an axis and provided with one of said die (2) and said punch (1);
- means (69) for linearly moving said punch (1) relative to said die (2) so as to effect linear movement, said linearly moving means being formed to press said punch and said die together;
- and
- means (85, 86, 88) for rotatably driving said bolster (74) in response to a lead of a helical gear to be manufactured and in synchronism with said linear movement of said punch (1), said driving means including a servo cylinder-piston unit.
3 more elements
A press for manufacturing helical gears, comprising:
- a punch (1) with a helically shaped cutting edge (4);
- a die (2) with a helically shaped cutting edge (5, 5a, 5b) corresponding to said cutting edge (4) of said punch (1);
- a rotatable bolster (74) rotatable about an axis and provided with one of said die (2) and said punch (1);
- means (69) for linearly moving said punch (1) relative to said die (2) so as to effect linear movement, said linearly moving means being formed to press said punch and said die together;
- and
- means for rotatably driving said bolster (74) in response to a lead of a helical gear to be manufactured and in synchronism with said linear movement of said punch (1), said driving means including an electric-hydraulic stepping cylinder-piston unit.
3 more elements
A press for manufacturing helical gears comprising:
- a punch with a helically shaped cutting edge;
- a die with a helically shaped cutting edge corresponding to said cutting edge of said punch;
- a rotatable bolster rotatable about an axis and provided with one of said die and said punch;
- means for linearly moving said punch relative to said die so as to effect linear movement, said linearly moving means being formed to press said punch and said die together;
- means for rotatably driving said bolster in response to a lead of a helical gear to be manufactured and in synchronism with said linear movement of said punch;
- a slide vertically movable and secured to said punch, said means for linearly moving said punch relative to said die being formed to vertically move said slide and including a press ram, said punch and said die and said bolster being aligned vertically relative to each other, said slide being movable in a stroke, said driving means including a rotatable driving member;
- means for detecting said stroke of said slide;
- means for calculating a desired rotation angle of said rotatable driving member in response to the lead of the helical gear to be manufactured and in response to said stroke as detected by said detecting means;
- and
- means for controlling said rotatable driving member in correspondence with said desired rotation angle as calculated by said calculating means.
7 more elements
Dependencies are inferred from the claim text.