Cutting – With means to convey work relative to tool station – Rectilinear movement only
Reexamination Certificate
2000-09-19
2002-12-10
Goodman, Charles (Department: 3724)
Cutting
With means to convey work relative to tool station
Rectilinear movement only
C083S409000, C083S552000, C074S089230, C074S089140
Reexamination Certificate
active
06490956
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a feeding apparatus of a moved body which moves a moved body such as a carriage provided with a work clamp for clamping a workpiece in a sheet material working machine, for example, a turret punch press or the like.
2. Description of the Related Art
In a conventional turret punch press corresponding to a sheet material working machine, the turret punch press includes a feeding apparatus
101
corresponding to a moved body for moving a workpiece wherein a carriage base
103
extending in a lateral direction as shown in
FIG. 1
is provided in such a manner as to move in a direction of a Y-axis (a vertical direction in FIG.
1
). A nut member is provided in a lower portion in a substantially center portion of the carriage base
103
, and a rotatable ball screw
105
extending in the direction of the Y-axis is provided in the nut member. One end of the ball screw
105
, for example, a lower end in
FIG. 1
is supported to a bearing
107
, and another end of the ball screw
105
, for example, an upper end in
FIG. 1
is connected to an output shaft of a Y-axis servo motor
111
mounted to a motor base
109
.
In the structure mentioned above, when driving the Y-axis servo motor
111
, the ball screw
105
is rotated and the carriage base
103
is moved in the direction of the Y-axis via the nut member.
Further, a rotatable long ball screw
113
is extended along a direction of an X-axis of the carriage base
103
, one end of the long ball screw
113
, for example, a left end in
FIG. 1
is supported to a bearing
115
, and another end of the long ball screw
113
, for example, a right end in
FIG. 1
is connected to an output shaft of an X-axis servo motor
119
mounted to a motor base
117
. In this case, the motor base
117
is mounted on the carriage base
103
. A nut member
121
(
121
′ in
FIGS. 3 and 4
) is engaged with the long ball screw
113
, and a carriage
123
(
123
′ in
FIG. 3
) is integrally provided in the nut member
121
. A plurality of work clamps
125
for clamping a workpiece W are provided in the carriage
123
.
In the structure mentioned above, when driving the X-axis servo motor
119
, the long ball screw
113
is rotated and the carriage
123
is moved in the direction of the X-axis via the nut member
121
, so that the workpiece W clamped by the work clamp
125
is moved in the direction of the X-axis. Accordingly, the workpiece W is moved in the direction of the X-axis and the direction of the Y-axis.
Further, a structure shown in
FIG. 2
has been known as another feeding apparatus
127
which moves the workpiece. In
FIG. 2
, the same reference numerals are attached to the same elements as the elements in FIG.
1
and an overlapping description will be omitted. In
FIG. 2
, one end and another end of the long ball screw
113
, for example, a left end and a right end in
FIG. 2
are connected to output shafts of X-axis servo motors
133
and
135
mounted to motor bases
129
and
131
. In this case, the motor bases
129
and
131
are mounted on the carriage base
103
.
In the structure mentioned above, when driving the X-axis servo motors
133
and
135
, the long ball screw
113
is rotated and the carriage
123
is moved in the direction of the X-axis via the nut member
121
, so that the workpiece W clamped by the work clamp
125
is moved in the direction of the X-axis. Accordingly, the workpiece W is moved in the direction of the X-axis and the direction of the Y-axis.
Further, there is another turret punch press as shown in
FIGS. 3
to
5
. The turret punch press is partly described in a German Patent Application, Laid-Open No. DE 198 21 763 A1, Laid-Open on Nov. 19, 1998.
In
FIGS. 3 and 4
, the same reference numerals are attached to the same elements as the elements in FIG.
2
and an overlapping description will be omitted. In
FIGS. 3 and 4
, a long ball screw spline
139
is used in place of the long ball screw
113
, and the output shafts of the X-axis servo motors
133
and
135
are connected to both ends of the long ball screw spline
139
. Linear guides
141
and
143
are extended to right and left portions on the carriage base
103
. A plurality of intermediate supports
145
are provided so as to move in a lateral direction by being guided along the linear guides
141
and
143
. Further, each of the intermediate supports
145
supports the long ball screw spline
139
when the long ball screw spline
139
rotates and the nut member
121
′ moves in the lateral direction.
The intermediate support
145
is in detail shown in FIG.
5
. In
FIG. 5
, the long ball screw spline
139
is constituted by a ball screw portion
139
B and a spline portion
139
S. Further, the intermediate support
145
is structured such that a first intermediate support main body
147
guided along the linear guide
141
or
143
and a second intermediate support main body
149
supporting the long ball screw spline
139
are integrally formed. A spline outer cylinder portion
151
and a ball screw nut portion
153
are provided within the second intermediate support main body
149
via support bearings
155
and
157
. A width D of the intermediate support is between 250 mm and 300 mm.
The spline outer cylinder portion
151
is engaged with the spline portion
139
S of the long ball screw spline
139
and the ball screw nut portion
153
is engaged with the ball screw portion
139
B of the long ball screw spline
139
. Further, for example, a pulley
159
is connected to the spline outer cylinder portion
151
by a bolt and for example, a pulley
161
is connected to the ball screw nut portion
153
by a bolt.
On the contrary, a rotatable shaft
163
is supported in a lateral direction corresponding to a longitudinal direction of the first intermediate support main body
147
and the other pulleys
165
and
167
are respectively attached to both ends of the shaft
163
. Timing belts
169
and
171
are respectively wound between the pulleys
159
and
165
and between the pulleys
161
and
167
.
In accordance with the structure mentioned above, when the long ball screw spline
139
is rotated as shown by an arrow in
FIG. 5
, the pulley
159
is rotated in the same direction as a rotational direction of the long ball screw spline
139
via the spline portion
139
S. The rotation of the pulley
159
is transmitted to the shaft
163
via the timing belt
169
and the pulley
165
and the shaft
163
is rotated. Further, the rotation of the shaft
163
is transmitted to the pulley
161
via the pulley
167
and the timing belt
171
and the pulley
161
is rotated, so that the ball screw nut portion
153
is moved, for example, in a rightward direction in FIG.
5
.
In
FIG. 5
mentioned above, when setting a ratio between diameters of the pulleys
159
and
165
to 1:1 and setting a ratio between diameters of the pulleys
161
and
167
to 1:½, a moving amount of each of the intermediate supports
145
becomes a half of a moving amount of the carriage
123
, whereby a moving operation is performed. In the drawing, reference symbol E denotes a mounting distance between the respective intermediate supports
145
.
In this case, as shown in
FIGS. 3 and 4
, the structure is made such that the intermediate supports
145
are provided for a high speed and a stabilization of the system, however, as shown in
FIG. 5
, there is employed a method of assembling the intermediate support
145
on the long ball screw spline
139
as shown in FIG.
5
. In this case, since it is necessary to provide the spline outer cylinder portion
151
, the ball screw nut portion
153
, the pulleys
159
,
161
,
165
and
167
and the timing belts
169
and
171
in the intermediate support
145
itself, there is a disadvantage that a width D of the intermediate support
145
is increased in view of the construction.
Since the width D, for example, between 250 mm and 300 mm does not affect on the long ball screw spline
139
in view of a space and becomes a wasteful dimensio
Becker Gunter
Takeishi Hideyuki
Amada MFG America Inc.
Goodman Charles
Greenblum & Bernstein P.L.C.
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