JP2021112768A - Press line - Google Patents

Abstract

To provide a press line capable of performing multi times of processing by one rotation of a crank shaft.SOLUTION: A press line 100 comprises: one servo motor 40; a slide 13 for reciprocating in a vertical direction; and a plurality of press units 10 which comprises, a crank shaft 12 being coupled to the slide 13 and having both ends supported to the frame 11, and the press units being driven by the servo motor 40. On one end of the crank shaft 12 on one press unit 10-3, the servo motor 40 for driving the crank shaft 12 is provided. The crank shafts 12 of the respective press units 10 are coupled and integrated along one direction. In view from an axial direction of the crank shaft 12, positions of crank pin parts 12a as eccentric parts of the respective crank shafts 12 are different.SELECTED DRAWING: Figure 1

Description

The present invention relates to a press line composed of a plurality of press units.

Patent Document 1 describes a mechanical press device, which transmits the rotational force from a motor to a crankshaft having a flywheel fixed at one end, and transmits the rotational motion of the crankshaft via a connecting rod. It was converted into a reciprocating linear motion of the slider.

Japanese Unexamined Patent Publication No. 7-116898

However, in the above-mentioned mechanical press device, it is necessary to recover the energy consumed in the machining of the bottom dead center by the next machining, and it is impossible to perform the machining a plurality of times in one rotation of the crankshaft.

In view of the above, it is an object of the present invention to provide a press line capable of machining a plurality of times with one rotation of the crankshaft.

In the invention according to claim 1, one servo motor and
A slide that reciprocates in the vertical direction, a plurality of press units that are connected to the slide and have crankshafts that are supported at both ends by a frame, and are driven by the servomotor.
With
At one end of the crankshaft of one of the press units, the servomotor that drives the crankshaft is disposed.
The crankshafts of each of the press units are connected and integrated along one direction.
The positions of the eccentric portions of the crankshafts are arranged so as to be different from each other when viewed from the axial direction of the crankshafts.

According to this, the torque applied to the servomotor can be reduced by connecting the crankshafts along one direction and arranging the eccentric parts of each crankshaft so as to be different from each other. It is possible to process multiple times with one rotation. Further, the number of press units can be increased or decreased within the range of the torque applied to the crankshaft, the weight of the object to be driven, and the driving time within the capacity of the servomotor. Furthermore, since all press units can be driven by one servomotor, the number of parts can be reduced, and by controlling one servomotor, multiple press units in the press line can be driven. ..

Furthermore, since each press unit is connected so that the position of the eccentric part of the crankshaft is different for each press unit, the servo motor is not subjected to the torque required for machining at the same time, and each press Torque is generated only when the crankshaft of the unit is at the bottom dead point, and torque is generated multiple times during one rotation of the crankshaft connected to the entire press line, and the strength of that torque is the processing of the press line. It is possible with the torque of the value obtained by dividing the torque required for the above by the number of press units.

This makes it possible to select a servomotor having a small rated torque in the process of selecting the capacity of the servomotor.

Further, when viewed from the axial direction of the crankshaft, the eccentric portions of the crankshafts are arranged so as not to face each other with the axis of the crankshaft interposed therebetween.

According to this, it is possible to prevent maintenance from becoming impossible when the slide stops at top dead center or bottom dead center.

Further, when viewed from the axial direction of the crankshaft, the eccentric portion of each of the crankshafts is arranged in a region having a central angle of less than 180 degrees about the axis of the crankshaft.

Even with such a configuration, it is possible to prevent maintenance from becoming impossible when the slide stops at top dead center or bottom dead center.

In addition, each of the press units is provided with a feeding device capable of feeding the workpiece along the feeding direction.
Each feeding device feeds the work piece each time the work piece is machined in the corresponding press unit.

According to this, when the connected crankshaft makes one rotation, each press unit sequentially processes, and the feed device feeds the workpiece each time the workpiece is processed in the corresponding press unit. The loop can be only one pitch of the feeder. Therefore, a device such as a loop stand can be eliminated.

It is a front view of the press line of one Embodiment of this invention. It is a process diagram of the same embodiment.

Next, an embodiment of the press line of the present invention will be described with reference to the drawings. In the following description, the top and bottom of the paper of FIG. 1 are the vertical direction, the left and right of the paper of FIG. 1 are the left and right directions, the front direction of the paper of FIG. 1 is the front, and the back of the paper is the back. Further, the feed direction of the workpiece W is the direction from left to right on the paper surface of FIG. 1.

As shown in FIG. 1, the press line 100 includes three press units 10, a servomotor 40, and a feeding device 60 arranged in each press unit 10.

In the present embodiment, each press unit 10 applies a servomotor removed from an existing servopress machine.

Each press unit 10 (when distinguishing, the left press unit 10 is referred to as a press unit 10-1, the central press unit 10 is referred to as a press unit 10-2, and the right press unit 10 is referred to as a press unit 10-3). As shown in FIG. 1, a frame 11 divided into a crown 11a, a column 11b, and a bed 11c, a crankshaft 12 rotatably supported in the crown 11a, and up and down in the column 11b connected to the crankshaft 12. It includes a slide 13 that is arranged so as to be able to reciprocate.

The crankshaft 12 extends in the left-right direction, and both ends thereof are supported by the crown 11a. A crankpin portion 12a (corresponding to an eccentric portion within the claims) is formed on the crankshaft 12, and a connecting rod 14 is connected to the crankpin portion 12a.

A slide 13 is connected to the lower end of the connecting rod 14 via a plunger 15.

The slide 13 is supported by a plurality of (2 to 4) guide posts (not shown) that guide the vertical reciprocating movement, and stabilizes the accuracy of the bottom dead center position of the slide 13 even in high-speed operation.

A bolster 17 is arranged on the upper surface of the bed 11c so as to face the slide 13.

Each crankshaft 12 is connected in the left-right direction via a coupling 18.

In the servomotor 40, as shown in FIG. 1, the crankshaft 12 of the press unit 10-3 located on the far right and the drive shaft 41 are connected via a coupling 18 and project from the frame 11. It is arranged like this.

As the feeding device 60, an existing one is used, and the feeding device 60 is arranged on the upstream side of the workpiece W of each press unit 10 in the feeding direction.

In the control circuit of the press line 100, each press unit 10, a servomotor 40, and a feeding device 60 are connected to an independent personal computer as a control device (not shown).

A main part of the present invention will be described. In the press line 100, the positions of the axial centers (eccentric portions) of the crank pin portions 12a of each crankshaft 12 are arranged so as to be different from each other when viewed from the axial direction (left-right direction) of the crankshaft 12.

More specifically, as shown in the upper part of FIG. 1, a phase difference of 60 degrees is provided with respect to the crank pin portion 12a of the press unit 10-2 when viewed from the axial direction (left-right direction) of the crankshaft 12. ..

Furthermore, the crank pin portions 12a of each crankshaft 12 are arranged so as not to face each other with the axis of the crankshaft 12 in between when viewed from the axial direction of the crankshaft 12. Further, it can be said that the crank pin portion 12a of each crankshaft 12 is arranged in a region having a central angle of less than 180 degrees about the axis of the crankshaft 12 when viewed from the axial direction of the crankshaft 12.

That is, the slide 13 is set at a position that can prevent maintenance from becoming impossible when the slide 13 is stopped at the top dead center or the bottom dead center.

Looking at one rotation of the entire connected crankshaft 12, as shown in FIG. 2, the crankshaft 12 of the press unit 10-1 reaches the bottom dead center at 120 degrees, and the crankshaft 12 of the press unit 10-2. Reaches bottom dead center at 180 degrees, and the crankshaft 12 of the press unit 10-3 reaches bottom dead center at 240 degrees. That is, the points where the torque is maximized in one rotation of the entire connected crankshaft 12 are shifted so as to be multiple times.

The operating time of the feed device 60 is 210 to 330 degrees for the press unit 10-1, 270 to 30 degrees for the press unit 10-2, and 270 to 30 degrees for the press unit 10- when viewed in one rotation of the entire connected crankshaft 12. In 3, it becomes 330 degrees to 90 degrees.

The feeding device 60 feeds the workpiece W each time the workpiece W is processed in the corresponding press unit 10. Therefore, since the material loop between the press units 10 can be limited to one pitch of the feeding device 60, equipment such as a loop stand and a loop sensor becomes unnecessary.

In the press line 100 having the above configuration, one servo motor 40 and
A slide 13 that reciprocates in the vertical direction, a plurality of press units 10 that have a crankshaft 12 that is connected to the slide 13 and whose ends are supported by a frame 11, and are driven by a servomotor 40.
With
A servomotor 40 for driving the crankshaft 12 is arranged at one end of the crankshaft 12 of one press unit 10-3.
The crankshafts 12 of each press unit 10 are connected and integrated along one direction.
The positions of the crank pin portions 12a as eccentric portions of each crankshaft 12 are arranged so as to be different from each other when viewed from the axial direction of the crankshaft 12.

According to this, the torque applied to the servomotor 40 can be reduced by connecting the crankshafts 12 to each other along one direction and arranging the crankpin portions 12a of each crankshaft 12 so as to be in different positions. , The crankshaft 12 can be machined a plurality of times with one rotation. Further, the number of press units 10 can be increased or decreased within the range of the torque applied to the crankshaft 12, the weight of the object to be driven, and the driving time within the capacity of the servomotor 40. Further, since all the press units 10 can be driven by one servomotor 40, the number of parts can be reduced, and by controlling one servomotor 40, a plurality of press units 10 in the press line 100 can be operated. Can be driven.

Further, each press unit 10 is connected so that the position of the crank pin portion 12a as the eccentric portion of the crankshaft 12 is different for each press unit 10, so that the servo motor 40 is necessary for processing. Torque is generated only when the crankshaft 12 of each press unit 10 is at the bottom dead point, and torque is generated a plurality of times while the crankshaft 12 connected to the entire press line 100 makes one rotation. The strength of the generated torque is made possible by the torque of the value obtained by dividing the torque required for machining the press line 100 by the number of press units 10.

This makes it possible to select a servomotor having a small rated torque in the process of selecting the capacity of the servomotor 40.

Further, the crank pin portions 12a of each crankshaft 12 are arranged so as not to face each other with the axis of the crankshaft 12 in between when viewed from the axial direction of the crankshaft 12.

According to this, it is possible to prevent maintenance from becoming impossible when the slide 13 is stopped at the top dead center or the bottom dead center.

Further, when viewed from the axial direction of the crankshaft 12, the crankpin portion 12a of each crankshaft 12 is arranged in a region having a central angle of less than 180 degrees about the axis of the crankshaft 12.

Even with such a configuration, it is possible to prevent maintenance from becoming impossible when the slide 13 stops at top dead center or bottom dead center.

Further, each press unit 10 is provided with a feeding device 60 capable of feeding the workpiece W along the feeding direction.
Each feeding device 60 feeds the workpiece W each time the workpiece W is processed in the corresponding press unit 10.

According to this, when the connected crankshaft 12 makes one rotation, the individual press units 10 sequentially process, and the feed device 60 processes each time the workpiece W is processed in the corresponding press unit 10. Since the object W is fed, the material loop can be limited to one pitch of the feeding device 60. Therefore, a device such as a loop stand can be eliminated.

The present invention is not limited to the above configuration. That is, various design changes and the like can be made without departing from the gist of the present invention.

For example, the position of the axial center (eccentric portion) of the crankpin portion 12a of each crankshaft 12 is set so that the positions of the eccentric portions of each crankshaft 12 do not face each other when viewed from the axial direction of the crankshaft 12. If so, it can be changed as appropriate.

It is also possible to connect the crankshafts 12 in the front-rear direction and arrange the plurality of press units 10 along the front-rear direction.

Further, although the press line 100 is composed of three press units 10, it can also be composed of two or four or more press units 10.

10 Press unit 10-1 Press unit 10-2 Press unit 10-3 Press unit 11 Frame 12 Crankshaft 12a Crankpin part 13 Slide 40 Servo motor 60 Feeding device 100 Press line W Work piece

Claims (4)

One servo motor and
A slide that reciprocates in the vertical direction, a plurality of press units that are connected to the slide and have crankshafts that are supported at both ends by a frame, and are driven by the servomotor.
With
At one end of the crankshaft of one of the press units, the servomotor that drives the crankshaft is disposed.
The crankshafts of each of the press units are connected and integrated along one direction.
A press line characterized in that the positions of eccentric portions of the crankshafts are arranged so as to be different from each other when viewed from the axial direction of the crankshafts. The press line according to claim 1, wherein the eccentric portions of the crankshafts are arranged so as not to face each other with the axis of the crankshaft interposed therebetween when viewed from the axial direction of the crankshaft. The first aspect of the present invention, wherein the eccentric portion of each crankshaft is arranged in a region having a central angle of less than 180 degrees about the axis of the crankshaft when viewed from the axial direction of the crankshaft. Press line. Each of the press units is provided with a feeding device capable of feeding the workpiece along the feeding direction.
The press line according to claim 1, 2 or 3, wherein each feeding device feeds the workpiece each time the workpiece is processed in the corresponding press unit.

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