JPH1177196A - Transfer press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer press which independently drives respective cross bar in the feed direction with using a motor and has reduced inertia and a drive loss of a feed mechanism. SOLUTION: The transfer press is provided with a lift beam 12 arranged in a feed direction, a motor driven lift mechanism 14 to elevate the lift beam, plural cross bar carriers 16 mounted to the lift beam reciprocatable in a feed direction and a motor driven feed mechanism 18 to reciprocate the cross bar carrier in a feed direction. Respective cross bar carriers 16 are independently mounted to the lift beam 12. Further, the feed mechanism 18 consists of a rack gear mounted to respective cross bar carriers 16, a pinion gear, which is engaged to the rack gear and mounted to the lift beam 12, and a vertical spline drive shaft rotation-driven by a sevo motor mounted to a fixed part. The pinion gear has a vertical through hole which is engaged to the spline drive shaft and is slidable, by rotation of the spline drive shaft, respective cross bar carriers 16 are independently reciprocated along the lift bar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vacuum transfer press having a cross bar.

[0002]

2. Description of the Related Art Press machines such as mechanical presses and hydraulic presses are widely used for plastically processing a sheet-like thin plate (work) using a mold. In addition, for automation and labor saving, a transfer press in which a feeder is incorporated in a press device is adopted, which is effective in streamlining work.

[0003] In a feeder (feeder) installed in such a transfer press, for example, a large number of crossbars are suspended at a fixed pitch between a pair of transfer bars arranged side by side in the work conveyance direction. Work suction means (eg, vacuum cup)
Is provided. The transfer press is a configuration in which a plurality of independent press devices are arranged adjacent to each other, and by moving each crossbar in a two-dimensional direction of a feed direction and a lift direction, a work is sequentially transported and supplied to an adjacent press device, For example, steps such as blanking, drawing, trimming, and piercing are sequentially performed, and a roof or a door of the vehicle is press-formed.

In a vacuum transfer press equipped with such a cross bar, a feed cam and a lift cam are rotated by power taken out of the press body,
The crossbar to which the work suction means is attached is driven by these cams in a two-dimensional direction of a feed direction and a lift direction.

[0005]

However, when the cam is driven in the feed direction and the lift direction by such a cam,
To make the crossbar motion pattern variable,
Since a plurality of cams are required in accordance with the motion pattern, there are problems that the driving mechanism becomes complicated and expensive, and the motion pattern that can be changed by the number of cams is limited.

[0006] To solve this problem, a "transfer feeder" (Japanese Patent Application Laid-Open No. 6-262280) has been filed. This transfer feeder has a pair of lift beams arranged side by side in the work transfer direction in the press body, and these lift beams are driven vertically by a lift mechanism driven by a servomotor. A plurality of crossbar carriers on which bars are suspended are movably provided, and these crossbar carriers are driven in a feed direction by a feed mechanism driven by a feed cam rotated by the power released from the press body. Things.

In other words, in this transfer feeder, the feed direction is the same as the conventional cam type, and only the lift direction is driven by the servo motor. Thus, by controlling the lift servomotor, various motion patterns can be easily obtained, and a cam is not required for each motion pattern, so that the drive mechanism can be simplified.

However, this transfer press (transfer feeder) has the following problems. Since the driving in the feed direction is still a mechanical type using a cam, it has become difficult to cope with a large and high-speed press, which has been increasingly required in recent years. In other words, as the rolling force and press speed of the transfer press increase and the speed increases, the size of the mechanical cam and the feed mechanism driven by the mechanical cam increase, and the inertia and drive loss of the cam and the feed mechanism increase significantly. As a result, wasteful power due to inertia and drive loss is increased as compared with the actual power required to move the crossbar, and the motor output becomes unnecessarily large, resulting in a very high cost. High-speed driving is difficult due to the large inertia of the cam and the feed mechanism. Further, even if the motor is enlarged and forcedly driven, chatter vibration and noise are likely to be generated, and the torque becomes enormous, so that the life of each component such as a cam, a gear, and a feed mechanism is extremely shortened. Since the feed direction is still mechanical, it is difficult to set a free motion pattern in the feed direction, and there are restrictions due to the cam shape. Since the movement in the feed direction of a plurality of presses constituting the transfer press is restricted in the same manner, the feed stroke cannot be changed for each press. Therefore, for example, it is impossible to cope with a case where the center position of the mold is offset.

The present invention has been made to solve the various problems described above. That is, a main object of the present invention is to provide a transfer press that can drive a crossbar in a feed direction and a lift direction using a motor. Another object of the present invention is that each crossbar can be independently driven in the feed direction, the inertia and the drive loss of the feed mechanism are small, the rigidity is simple, the rigidity is high, the speeding-up is easy, and the vibration is reduced. An object of the present invention is to provide a transfer press in which noise and noise are hardly generated. Another object of the present invention is to provide a transfer press that can drive a crossbar with a plurality of relatively small motors and that can complementarily drive when a motor fails.

[0010]

According to the present invention, a pair of lift beams arranged side by side in a work feeding direction, a motor driven lift mechanism for driving the lift beams in a vertical direction, and a reciprocating movement in the feeding direction are provided. A transfer press, comprising: a plurality of crossbar carriers that are attached to a lift beam and crossbars are crossed over; and a motor-driven feed mechanism that drives the crossbar carriers in a feed direction. Is done.

According to this configuration, since the motor is provided with the lift mechanism and the feed mechanism, the crossbar can be freely driven in the feed direction and the lift direction using the motor. Therefore, since there is no mechanical cam and the feed mechanism is simple, and the motor is driven in both the feed direction and the lift direction, there is no restriction due to the cam shape, and a free motion pattern can be set.

According to a preferred embodiment of the present invention, each crossbar carrier is independently mounted on the lift beam, and the feed mechanism is mounted on each crossbar carrier and extends in the feed direction and a drive from a motor. A mechanism for converting rotation into feed by receiving a force cooperates with the drive mechanism, so that a plurality of drive shafts rotationally driven by a motor attached to a fixed portion can be driven while sliding with respect to the vertical movement of the lift. The mechanism for transmitting the motor rotation to the drive mechanism has a penetrating shaft so that it can be driven while sliding even if the lift mechanism moves up and down, and the lift is moved up and down by being driven by each motor. The crossbar carrier can reciprocate independently.

Further, each crossbar carrier is independently attached to the lift beam, and the feed mechanism is mounted on each crossbar carrier and extends in the feed direction and extends forward and backward, and meshes with each rack gear. A plurality of pinion gears attached to a lift beam rotatably about a vertical axis, and a plurality of vertical spline drive shafts attached to a fixed portion and rotationally driven by a servomotor; Has a slidable vertical through-hole that meshes with each spline drive shaft, thereby enabling each crossbar carrier to move independently along the lift beam that moves up and down by the rotation of each spline drive shaft by each servomotor. To reciprocate.

According to this configuration, the servomotor and the spline drive shaft driven by the servomotor are mounted on the fixed portion, and the pinion gear is mounted on the lift beam, so that it is mounted on each crossbar carrier in the feed mechanism. Only the rack gear is used, the inertia and drive loss of the feed mechanism can be extremely reduced, and the feed mechanism is simple and has high rigidity, can be easily operated at high speed, and can greatly reduce the generation of vibration and noise. Also, by each servo motor,
Each crossbar carrier can reciprocate independently along the lift beam that moves up and down, so the feed stroke can be freely changed for each press,
For example, it is possible to easily cope with a case where the center position of the mold is offset.

[0015] The apparatus may further include a detachable connecting member for connecting the plurality of crossbar carriers to each other. By attaching this connecting member, a plurality of crossbar carriers can be linked with each other, and even when one of the plurality of servomotors fails, the other servomotors can be driven to complement each other. Interference between the bar and the mold can be prevented beforehand. In addition, by removing the connecting member, each crossbar carrier can be independently reciprocated as described above.

Further, it is preferable that each of the spline driving shafts is rotationally driven in parallel by a plurality of servomotors. With this configuration, the crossbar can be returned to a normal position by another servomotor even when each crossbar carrier reciprocates independently of each other, or when any of a plurality of servomotors fails. Interference between the crossbar and the mold can be avoided.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In each of the drawings, common portions are denoted by the same reference numerals, and redundant description will be omitted. FIG. 1 is an overall configuration diagram of a transfer press according to the present invention. As shown in this figure, in the transfer press of the present invention, a pair of lift beams 12 arranged side by side in the work feeding direction, a motor driven lift mechanism 14 for driving the lift beams 12 in the vertical direction, A plurality of crossbar carriers 1 reciprocally attached to a lift beam 12 and having a crossbar suspended therefrom.
6 and a motor-driven feed mechanism 18 for driving the crossbar carrier 16 in the feed direction.

In this figure, 1 is a transfer press body, 2 is a slide, 3 is a slide drive mechanism,
Reference numeral 4 denotes a moving bolster, and reference numeral 5 denotes a lower die. The lower die 5 and an upper die (not shown) are sequentially press-formed while moving a work in a feed direction indicated by an arrow 6. Reference numeral 11 denotes a fixed beam fixed horizontally to the transfer press main body 1.
The main part of the feed mechanism 18 is installed on the above.

A pair of lift beams 12 extend horizontally in the press body, and are suspended by a lift mechanism 14. The lift mechanism 14 includes a servo motor 14a, and the pair of lift beams 12 is vertically moved by the servo motor 14a. Servo motor 1
The vertical movement of the lift beam 12 by 4a is caused by, for example, a rack and a pinion, a ball screw, or the like.

In this embodiment, a plurality of lift mechanisms 14 are provided, and the lift beam 12 is moved up and down synchronously as a whole. With this configuration, the required output of each of the servomotors 14a can be reduced and downsized, and even if one of the plurality of servomotors fails, the servomotors 14a can be complementarily driven by another servomotor.

FIG. 2 is an enlarged view of a portion A in FIG. 1, and FIG.
FIG. 4 is an enlarged sectional view taken along line AA of FIG. As shown in FIGS. 2 to 4, in the present invention, each crossbar carrier 16 is independently attached to the lift beam 12. That is, as shown in FIG. 4, the crossbar carrier 16 is moved along a horizontal rail 12a provided on the lift beam 12 by a cam follower 16a.
And can move freely in the feed direction (horizontal direction). In FIG. 4, reference numeral 13 denotes a crossbar, both ends of which are attached to the crossbar carrier 16 so as to move up and down and horizontally with the crossbar carrier 16.

The feed mechanism 18 of the present invention comprises a rack gear 19 attached to each crossbar carrier 16 and a plurality of pinion gears 2 attached to the lift beam 12.
0, and a spline drive shaft 21 rotated and driven by a servo motor 21a. As shown in FIG. 2, a servo motor 21 a constituting a driving mechanism of the feed mechanism 18,
The reduction gear 21b, the bevel gear box 21c, and the spline drive shaft 21 are all a fixed beam 11
Attached to.

As shown by a two-dot chain line in this figure, each of the spline drive shafts 21 is rotated in parallel by a plurality of servomotors 21a so that individual servomotors 2 are driven.
The required output of 1a can be reduced to reduce the size, and even when one of the plurality of servomotors 21a fails, the normal driving of the spline drive shaft 21 can be continued by another servomotor. Further, by providing the detachable connecting member 17 for connecting the plurality of crossbar carriers 16 to each other, the plurality of crossbar carriers can be linked with each other, and even if any of the plurality of servomotors has failed. The drive can be complementarily driven by other servomotors, and for example, interference between the crossbar and the mold can be prevented.

As shown in FIGS. 3 and 4, the rack gear 1
Reference numeral 9 is attached to each crossbar carrier 16 and extends back and forth in the feed direction (horizontal direction). In addition, the pinion gear 20 meshes with each rack gear 19.

FIG. 5 is an enlarged sectional view of the pinion portion of FIG. As shown in this figure, the pinion gear 20 is rotatably mounted about a vertical axis by a bearing 12 a provided on the lift beam 12. Further, each pinion gear 20 has a slidable vertical through-hole 20a that meshes with each spline drive shaft 21. With this configuration, each spline drive shaft 21
, The crossbar carriers 16 can be independently reciprocated along the lift beam 12 that moves up and down.

As described above, the transfer press of the present invention has the following configuration. The feed drive system is driven by a motor, and the motor is independently provided for each crossbar carrier.The motor is arranged independently of the lift beam to reduce the inertia of the lift beam, and therefore slides during lift. It has a shaft mechanism. Furthermore, fix the motor to the fixed part,
Feed position control is performed independently for each motor, and position signals are sent independently in conjunction with the movement of the press.
They may all be the same position signal or different, and can be changed freely. In addition, the crossbar carriers can be used independently or in combination with each other.

Further, the driving motor has one drive per carrier.
Many motors can be used as a drive source, not just a stand. The crossbar carrier is moved in the feed direction relative to the lift beam. Further, the rack mounted on the crossbar carrier is driven via a pinion from a gear box fixed to a lift beam. Since the pinion is driven by the slide shaft, the slide drive shaft is longer than the lift stroke so that the drive is not hindered by the lifting beam being moved up and down. The pinion bearing is doubled so that the sliding shaft can rotate while sliding.

Although not shown, as another embodiment, a configuration in which a motor is mounted on a crossbar carrier, and a rack is formed on a lift beam and driven is also possible. Further, a fixed portion is provided from the motor to the bevel gear mechanism, and the motor can be driven to bevel from a plurality of motors.

As described above, according to the configuration of the present invention,
To have a motor driven lift mechanism and feed mechanism,
The crossbar can be freely driven in the feed direction and the lift direction by using a motor. Therefore, since there is no mechanical cam and the feed mechanism is simple, and the motor is driven in both the feed direction and the lift direction, there is no restriction due to the cam shape, and a free motion pattern can be set.

According to the above-described embodiment, the servo motor and the spline drive shaft driven by the servo motor are mounted on the fixed portion, and the pinion gear is mounted on the lift beam. Only the rack gear can be attached, the inertia and the drive loss of the feed mechanism can be extremely reduced, and the feed mechanism is simple and has high rigidity, the speed can be easily increased, and the generation of vibration and noise can be greatly reduced. In addition, since each crossbar carrier can be independently reciprocated along a lift beam that moves up and down by each servomotor, the feed stroke can be freely changed for each press, for example, the center position of the mold. Can be easily dealt with even when the data is offset.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention. For example, although a feed mechanism using a rack and a pinion has been illustrated, for example, drive using a ball screw, drive using a linear motion cylinder, or the like may be used.

[0032]

The transfer press of the present invention has the following features. The mechanism is simplified, the mechanical rigidity is high, and the vibration is small as compared with the drive by the cam type mechanism. Since each carrier is driven, a small motor can be used, so that the weight of the mechanism can be reduced and the cost can be reduced. The machine load is light and the machine has a long life. Unlike a cam type, it is not fixed by one drive function, but can be given a function freely according to a mold and a work cycle, and a machine with high productivity can be obtained. In other words, while the mechanical type is fixed to the maximum drive function, it is possible to operate at a higher speed and a gentler function depending on the mold and product. By fixing the motor to the fixed portion, the load on the drive motor of the lift system is not increased. Since the motor can be driven independently, it is possible to easily cope with a case where it is desired to change the stroke for each carrier with a mold configuration. When the carriers are connected to each other, they can be complementarily driven in the event of a motor accident, thereby avoiding an accident in which the crossbar and the mold interfere with each other. If a drive system that distributes many motors per carrier is used, even if one motor shaft fails, the crossbar can be returned to a normal position by another motor, and the mold and the crossbar Interference is avoided. Driving force from the motor to the carrier is supplied by a slidable drive shaft. Therefore, the motor load can be reduced without increasing the weight of the movable part.

Therefore, the transfer press of the present invention can drive the crossbars in the feed direction and the lift direction by using the motor, and can drive each crossbar independently in the feed direction. Inertia and drive loss are small, simple and rigid, high speed is easy, vibration and noise are not easily generated, and the crossbar can be driven by a plurality of relatively small motors.
In addition, it has excellent effects such that the motors can be complementarily driven when the motor fails.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a transfer press according to the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is an enlarged sectional view of a portion B in FIG. 2;

FIG. 4 is an arrow view taken along line AA of FIG. 3;

FIG. 5 is an enlarged sectional view of a pinion part of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transfer press main body 2 Slide 3 Slide drive mechanism 4 Moving bolster 5 Lower mold 6 Feed direction 11 Fixed beam 12 Lift beam 12a Bearing 14 Lift mechanism 14a Servo motor 16 Crossbar carrier 17 Connecting member 18 Feed mechanism 19 Rack gear 20 Pinion gear 20a Vertical through hole 21 Spline drive shaft 21a Servo motor 21b Reduction gear 21c Bevel gear box

Claims (5)

[Claims] 1. A pair of lift beams arranged side by side in a work feed direction, a motor-driven lift mechanism for driving the lift beams in a vertical direction, and a crossbar mounted on the lift beams so as to be reciprocally movable in the feed direction. A transfer press, comprising: a plurality of crossbar carriers on which a crossbar is mounted; and a motor drive feed mechanism for driving the crossbar carriers in a feed direction. 2. A cross bar carrier is independently attached to a lift beam. The feed mechanism receives a driving force from a motor and a driving mechanism attached to each cross bar carrier and extending in a feed direction, and rotates the feed into a feed. The mechanism for converting cooperates with the drive mechanism, and is configured such that a plurality of drive shafts rotationally driven by a motor attached to a fixed portion can be driven while sliding with respect to vertical movement of the lift, The mechanism that transmits motor rotation to the drive mechanism has a penetrating shaft so that it can be driven while sliding even when the lift mechanism moves up and down, and the crossbar carrier reciprocates independently while the lift moves up and down driven by each motor The transfer press according to claim 1, wherein the transfer press can be used. 3. Each crossbar carrier is independently mounted on a lift beam, and the feed mechanism is mounted on each crossbar carrier and extends in the feed direction and extends forward and backward, and meshes with each rack gear. A plurality of pinion gears attached to a lift beam rotatably about a vertical axis, and a plurality of vertical spline drive shafts attached to a fixed portion and rotationally driven by a servomotor; Has a slidable vertical through-hole that meshes with each spline drive shaft, thereby enabling each crossbar carrier to move independently along the lift beam that moves up and down by the rotation of each spline drive shaft by each servomotor. To reciprocate,
The transfer press according to claim 1, wherein: 4. The transfer press according to claim 2, further comprising a detachable connecting member that connects the plurality of crossbar carriers to each other. 5. The transfer press according to claim 2, wherein each of the spline driving shafts is driven to rotate in parallel by a plurality of servomotors.