JPH0654483U - Press machine - Google Patents

Abstract

(57) [Abstract] [Purpose] Conventionally, one large-capacity drive motor was used to reciprocate one of the upper die and the lower die in the vertical direction. One of them is to reciprocate one of the upper mold and the lower mold in the vertical direction to increase the rotational torque of the pressurizing device and reduce the price. [Structure] Either one of the upper die 15 and the lower die 5, for example, the upper die 15 is provided with a nut member 13, and the nut member 13 is provided.
Then, the rod member 11 is rotatably screwed. A pulley 17 which is a part of a transmission mechanism is provided above the rod member 11, and the pulley 17 has timing belts 27, 29,
It is characterized in that the small-capacity first and second servomotors 19 and 21 are interlockingly connected via pulleys 23 and 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a press machine that presses a work with a pressing device such as a shearing machine, a press, and a press brake.

[0002]

[Prior art]

 Conventionally, for example, in a shearing machine, a press, a press brake, etc., a crank mechanism or a hydraulic mechanism is generally used as a structure for moving a ram up and down. However, press brakes with a structure that allows the ram to move up and down with a screw mechanism have also been developed. (For example, Japanese Examined Patent Publication No. 61-43160, hereinafter referred to as a prior example.)

[0003]

[Problems to be solved by the device]

 By the way, in the conventional example described above, it is necessary to increase the rotation speed of the motor for high-speed vertical movement of the ram and to greatly reduce the speed during press working to increase the pressing force of, for example, 10 tons or more. A servo motor with a large capacity is required, which is expensive.

In the present situation, as shown in FIG. 5, for example, the price of the servo motor is particularly three to four times higher than that of the servo motor.

In order to improve the above-mentioned problems, an object of the present invention is to reciprocate one of the upper mold and the lower mold in the vertical direction by using a plurality of low-capacity drive motors having a low price of 3 to 5 KW or less. The purpose is to provide a press machine that can be moved to give a large pressure.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a press machine for pressing a work by cooperation of an upper die and a lower die, wherein a nut member is provided on one of the upper die and the lower die, and the nut member is attached to the nut member. A threaded rod member was provided extending in the vertical direction, and a plurality of small-capacity drive motors were linked to this rod member via a transmission mechanism to form a press machine.

[0007]

[Action]

 By adopting the press machine of the present invention, a nut member is provided on either the upper die or the lower die, and a plurality of small-capacity drive motors are mounted on the rod member screwed to the nut member via a transmission mechanism. They are linked together. Therefore, when a plurality of small capacity type drive motors are driven, the rod member is rotated by the transmission mechanism, so that one of the upper die and the lower die moves vertically with respect to the other via the nut member. The work is reciprocated and the work is pressed by the cooperation of the upper and lower dies.

As described above, the pressing force is applied by using the plurality of small-capacity drive motors without using the expensive large-capacity drive motor.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, the press machine 1 includes a lower table 7 that supports a lower die 5 on the lower front side of a side frame 3 having a C shape, for example. A bearing 9 is attached to the front upper portion of the side frame 3 by a plurality of bolts or the like.

A rod member 11 such as a freely rotatable ball screw extending vertically is supported in the bearing 9 in the axial direction, and a nut member 13 is screwed to the rod member 11. . The nut member 13 is provided with an upper mold 15 at a position corresponding to the lower mold 5.

A pulley 17 which is a part of a transmission mechanism is mounted on the rod member 11. On the other hand, a small capacity first servomotor 19 and a second servomotor 21 are attached to the side frame 3. Pulleys 23 and 25 are attached to the output shafts of the first and second servomotors 19 and 21, respectively. Timing belts 27 and 29 are respectively wound around the pulley 23 and the pulley 17; the pulley 25 and the pulley 17.

With the above configuration, when the first and second servomotors 19 and 21 are driven, the pulley 17 is rotated via the pulleys 23 and 25 and the timing belts 27 and 29. That is, the torque of the first and second servomotors 19 and 21 is transmitted to the pulley 17.

When the pulley 17 is rotated, the rod member 11 is rotated and the upper die 15 is reciprocally moved in the vertical direction via the nut member 13 so that the work W placed on the lower die 5 is moved. By the cooperation of the lower mold 5 and the upper mold 15, a constant pressing force is applied and press working is performed.

The capacities of the first and second servomotors 19 and 21 are smaller than 3 to 5 KW, but compared with those using one large capacity servomotor larger than 3 to 5 KW Rotation can be given to the rod member 11 with a double force. For example, in the case of about 3.5 KW as shown in FIG. 5, the price of 3.5 KW × 2 <the price of 7 KW × 1 can be achieved, and the cost can be reduced. Moreover, the synchronous operation of the first and second servomotors 19 and 21 can be easily performed.

As a transmission mechanism for transmitting the motor torque of the first and second servomotors 19 and 21 to the rod member 11, small gears 31 and 33 and a large gear 35 as shown in FIG. 2 may be used. Alternatively, the worms 37, 39 and the worm gear 41 as shown in FIG. 3 may be used. Further, as shown in FIG. It is also possible to wind and transmit the timing belt 43. Also, three or more servo motors may be used.

It should be noted that the present invention is not limited to the above-described embodiment, but can be implemented in other modes by making appropriate changes. In the present embodiment, an example in which the upper die 15 is reciprocally moved in the vertical direction has been described, but it is also possible to reciprocate the lower die 5 in the vertical direction.

[0018]

[Effect of device]

 As can be understood from the above description of the embodiments, a nut member is provided on either the upper mold or the lower mold, and a plurality of small-capacity molds are mounted on a rod member screwed to the nut member via a transmission mechanism. Since the drive motors are linked together, the rotational torque for rotating the rod members with multiple small capacity drive motors can be output with a torque that is more than twice the rotational torque with one large capacity drive motor, and at the same price. It is possible to obtain a pressure device that is cheap.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a press machine of an embodiment for carrying out the present invention.

FIG. 2 is an explanatory view of another embodiment of the transmission mechanism that rotates the rod member by the first and second servomotors in FIG.

FIG. 3 is an explanatory view of another embodiment of the transmission mechanism that replaces FIG.

FIG. 4 is an explanatory view of another embodiment of the transmission mechanism that replaces FIG.

FIG. 5 is a diagram showing a relationship between a motor capacity of a servo motor and a price.

[Explanation of symbols]

 1 Press Machine 3 Side Frame 5 Lower Die 7 Lower Table 9 Bearing 11 Rod Member 13 Nut Member 15 Upper Die 17 Pulley 19,21 First and Second Servo Motors 23,25 Pulley 27,29 Timing Belt

Claims (1)

[Scope of utility model registration request] 1. A press machine for pressing a work by cooperation of an upper die and a lower die, wherein a nut member is provided on either one of the upper die and the lower die, and the nut member is screwed into the nut member. A press machine characterized in that a rod member is provided extending in the vertical direction, and a plurality of small-capacity drive motors are interlockingly connected to the rod member via a transmission mechanism.