JP2000280038A - Transfer feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer feeder which conveys materials of different length to a core aligning position on a press mold without exchanging a finger. SOLUTION: This invention refers to a transfer feeder wherein a pair of an anti-reference side feed bar 1 and an anti-reference side feed bar 2 activate an opening/closing, ascending/descending and forwarding/backwarding movements. The first servo motor M1 and the second servo motor M2 are provided so that the motor M1 makes the anti-reference side feed bar 1 activate an opening/closing action, and the motor M2 makes a reference side feed bar 2 activate an opening/closing action. In this case, the first and second motors M1, M2 are made to perform opening/closing actions individually.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a transfer feeder. A forged material preformed by a forging roll or the like may have a large variation in the length of each material after forming in the preforming process. The present invention relates to a transfer feeder for clamping preformed forged materials having different lengths and feeding them to a predetermined position on a press die.

[0002]

2. Description of the Related Art In a forging press equipped with a transfer feeder, a plurality of dies are arranged side by side to perform a press working, and after one process is completed, the work is sent to the next die and subjected to the next process, thereby efficiently mass-producing products. We are going to manufacture. The transfer feeder is a device that conveys a work to a next process die in a forging press, and includes a pair of feed bars 1 and 2 arranged in an upper space of a lower die in the press,
As shown in FIG. 6, the feed bars 1 and 2 repeatedly move in the order of the closing operation C, the ascending U, the forward A, the descending D, the opening operation O, and the retreating R to move the workpiece from the preceding process die to the next process die. It is designed to be transported. A conventional feed bar driving device as described above is disclosed in JP-A-6-304690. As typified by this, the opening and closing operation of the pair of feed bars 1 and 2 is performed by a common servo. It is done with the motor. Therefore, both feed bars 1 and 2 open and close only at the same timing and at the same distance.

[0003] The problems of the above conventional example will be described with reference to FIG. (1) A plurality of fingers 101 and 102 are attached to the pair of feed bars 1 and 2 so as to approach each other and grip the work W from both sides at the clamping completion point. However, the moving distance d of the two fingers 101 and 102
Are the same, so that the preformed material W
If the lengths a and Wb are different, the reference finger must be exchanged between the long finger 102 and the short finger 102a. However, such labor greatly reduces productivity.

(2) By the way, since the shape and dimensions of the work W change with each machining between the multi-step metal molds, the shape and dimensions of the anti-reference side finger 101 are changed accordingly. In order to grip the workpiece W, the fingers 101 must be individually pressed in the direction of the workpiece W to pinch the workpiece W. Conventionally, a configuration in which the urging force of a spring is applied for this pressing action is often used. However, the related art in which the finger is pressed against the work by the spring urging force has the following problems. FIGS. 8 (a) and 8 (b) show a basic operation common to the configuration using a spring as a biasing force. (a) In the figure, a pair of left and right feed bars 1 and 2 approach each other, and a finger 101 attached to a finger holding portion 104 by being compressed until a spring 103 reaches a length F, and a finger fixed to the feed bar 2. 10 shows a state in which the work W is pressed and gripped between the workpiece W and the workpiece 102. At this time, the center line of the work W is a line K1 that coincides with the center of the mold. The feed bars 1 and 2 move forward in this state, and pinch and transport the work W to the next process die. (b) In the figure, the feed bars 1 and 2 are opened to the left and right on the
Reference numeral 102 indicates a state in which the workpiece W is to be released. This opening operation starts at the same time in the left and right directions. However, when the feed bar 2 starts to open, the spring 103 in the feed bar 1 expands and the work W is kept pressed against the feed bar 2 side. Bar 1
Retreats, the workpiece W falls. However, the work W is pushed rightward in the figure by the spring 103 immediately before dropping, so that the center line K2 of the work W is shifted with respect to the center of the mold. Therefore, there is a problem that if the press working is performed as it is, a defective product is produced or a mold is damaged.

Therefore, as another prior art, when conveying a forged material having a variation in length by preforming, a countermeasure as shown in FIG. 9 has been implemented. First, on the lower mold LD,
A stopper surface 105 of the work W is provided on the side that becomes a reference position during forging. Then, the finger 102 of the feed bar 2 on the side of the stopper surface 105 is reduced in stroke or fixed, and the finger position is set so that the reference surface of the workpiece W at the time of lowering is inside the mold stopper surface 105. . In this manner, during the opening operation, even if the finger 101 of the non-reference side feed bar 1 is pressed by the spring 103 or the like, the work W is pressed against the mold stopper surface 105, so that the work W is held in the center of the lower mold. You won't be out of your mind. However, even in this conventional example, the die LD
If the stopper surface 105 is not large enough, the work W is pushed on the lower die LD by the spring 103 of the non-reference side finger 101 during unclamping.
There has been a problem that the product is defective due to the displacement. In addition, in the case where a large clamping force is required to hold and carry the end face of the work W, an extremely long spring 103 is required for the anti-reference side finger 101 in order to allow a large variation in the length of the transfer material. There was a problem that it could not be installed in the space where it was located.

[0006]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention can convey materials having different lengths without exchanging fingers, and can convey accurately to a predetermined position on a press die where the materials are aligned. It is intended to provide a transfer feeder.

[0007]

According to a first aspect of the present invention, there is provided a transfer feeder, wherein a pair of a reference side feed bar and a non-reference side feed bar opens and closes, moves up and down, and moves forward and backward. A first servomotor for operating the first and second servomotors for opening and closing the non-reference side feed bar is provided, and the operation of the first and second servomotors is individually controlled.

According to the first aspect of the present invention, the first servo motor of the reference-side feed bar and the second servo motor of the non-reference-side feed bar are individually driven to move different distances during the opening / closing operation. be able to. For this reason, even if the materials have different lengths, the materials can be gripped without exchanging the fingers, and the reference side field bar is first opened to eliminate the biasing force of the biasing spring, and then the counter reference side field bar is released. Since the bar can be opened, there is no inconvenience of misalignment of the material placed in the lower mold.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of a transfer feeder according to an embodiment of the present invention, FIG. 2 is a side view of the transfer feeder, FIG. 3 is a rear view of the transfer feeder, and FIG. 5
FIG. 4 is an explanatory view of an unclamping operation in the present invention.

In FIGS. 1 to 3, reference numeral 1 denotes a reference side feed bar, and reference numeral 2 denotes a reference side feed bar. Although not shown in each of the feed bars 1 and 2, a spring-biased finger 3 and a fixed finger 4 as shown in FIG.
As many as the number of dies in the multi-step dies can be mounted. Reference numeral 5 denotes a base frame on the base end side of the transfer feeder, and reference numeral 6 denotes a base frame on the front end side. These base frames 5 and 6 are fixed in the space above the lower die of the forging press.

Reference numeral 7 denotes a lifting frame on the base end side of the transfer feeder, and reference numeral 8 denotes a lifting frame on the distal end side. The elevating frame 7 is attached to the base frame 5 via a slide guide 9 so as to be able to move up and down. The elevating frame 8 is also attached to the base frame 6 via a slide guide 9 so as to be able to move up and down. The elevating frames 7, 8 are connected to a screw type screwing mechanism 10A attached to the base frames 5, 6. This screw type screw mechanism 10A
Is provided with a screw rod 11 and a nut 12 screwed into the screw rod 11 so as to be unable to rotate.
Is a known mechanism for moving the control object forward and backward when the screw rod 11 is rotated by a motor. The screw-type screwing mechanisms 10B, 10C, and 10D, which will be described later, are similar mechanisms. The two screw-type screwing mechanisms 10A and 10 for raising and lowering
A is connected to elevation servomotors M3 and M3. By driving the two servomotors M3 and M3, the elevation frames 7 and 8 are raised and lowered, and thus the feed bars 1 and 2 are raised and lowered. It has become.

A slide rail 21 for moving forward and backward is installed on the elevating frame 7 on the base end side. A carriage 22 moves forward and backward on the slide rail 21. On the other hand, a screw type screwing mechanism 10B for forward / backward movement is fixed to the elevating frame 7, and a screw rod 11 thereof is connected to a servomotor M4 for forward / backward movement.
Is connected to the carriage 22. As will be described in detail later, the feed bars 1 and 2 are connected to the carriage 22 via the connecting member 13 and the connecting arm 32 at the base ends of the feed bars 1 and 2. Further, the distal ends of the feed bars 1 and 2 are slidably attached to a connecting arm 32 to be described later in the forward and backward movement directions. Therefore, when the servo motor M4 is driven, the carriage 22 can be moved forward and backward, and the pair of feed bars 1 and 2 can be moved forward and backward similarly.

The carriage 22 moves forward and backward on the lifting frame 7 on the base end side. A slide guide 31 is provided on the carriage 22 in a direction perpendicular to the direction. On the carriage 22, two screw-type screwing mechanisms 10C and 10D are individually installed in series in the width direction. The nuts 12, 12 of the screw type screwing mechanisms 10C, 10D
Are connected to each other, the connecting members 13 and 13 are guided by the slide guide 31 and move in the width direction of the lifting frame 7. The base ends of the feed bars 1 and 2 are connected to the connecting members 13 and 13 via connecting arms 32 and 32, respectively. And
A first servo motor M1 is connected to the screw type screw mechanism 10C for the feed bar 1, and a second servo motor M2 is connected to the screw type screw mechanism 10D for the feed bar 2.

On the other hand, a slide guide 31 is also provided on the elevating frame 8 on the distal end side, and two screw-type screwing mechanisms 10C and 10D are provided in series. Connecting members 13 are connected to the nuts 12 of the screw type screwing mechanisms 10C and 10D.
3 and 13 are guided by the slide guide 31 and move in the width direction of the lifting frame 8. Also, this connecting member 1
Feed bars 1 and 2 are connected to 3 and 13 via connecting arms 33 and 33, respectively. However, the connecting arms 33, 33 are not directly connected to the feed bars 1, 2, but a slide tube 34 is attached to the lower end thereof, and the distal ends of the feed bars 1, 2 are inserted into the slide tube 34. Then, it is slidably held. Then, a first servomotor M1 is connected to the screw type screwing mechanism 10C for the feed bar 1, and a second servo motor M2 is connected to the screw type screwing mechanism 10D for the feed bar 2. Therefore, the pair of feed bars 1 and 2 can be opened and closed by the first and second servo motors M1 and M2.

As described above, the present invention is characterized in that the first servo motor M1 for opening and closing the feed bar 1 and the feed bar 2
The second servomotors M2 for opening and closing are individually provided, and these are individually controlled. Therefore, the feed bars 1 and 2 can be opened and closed at different timings and can be moved at different distances.

Next, advantages of the transfer feeder according to the present embodiment will be described. 4A and 4B are explanatory diagrams of the clamping action. FIG. 4A shows a case where a short material Wa is clamped, and FIG. 4B shows a case where a long material Wb is clamped. (A) In the figure, the material W
Since the lengths at both ends of “a” are the same, the same clamping operation distance d of the feed bars 1 and 2 is sufficient. However, the lengths of both ends of the material Wb with respect to the mold center line K are different in FIG.
The right side in the figure is longer. In this case, the operating distance d 'of the feed bar 2 may be shortened while the operating distance d of the feed bar 1 is kept the same, so that the material Wb can be surely removed without replacing the finger 4 with a shorter one. Can be grasped.

FIG. 5 is an explanatory view of the unclamping operation of the finger 3 of the non-reference side feed bar 1 using a spring biasing type. (I) shows a state immediately before unclamping, in which the material W is conveyed onto the lower die LD by the fingers 3 and 4 of the pair of fingers 1 and 2. From this state, lower the feed bars 1 and 2 to (II)
As shown in the figure, only the non-reference side feed bar 1 is slightly retracted. During this retreating operation, the urging spring 5 tries to extend, but since the reference-side feed bar 2 is stopped without retreating, the material W does not shift with respect to the mold center K. . In this way, when the urging spring 5 is fully extended, the two feed bars 1 and 2 are retracted in accordance with the timing, so that the feed bars 1 and 2 are aligned with the lower mold.
The material W can be accurately placed on the lower mold LD. As described above, according to the transfer feeder of the present embodiment,
There is no need to exchange fingers when clamping materials of different lengths, and there is no misalignment when unclamping.

[0018]

According to the first aspect of the present invention, the first servo motor of the reference-side feed bar and the second servo motor of the non-reference-side feed bar are individually driven so that different distances are provided during the opening / closing operation. Because it can be moved, even if the materials have different lengths, the materials can be grasped without replacing the fingers, and after the reference side field bar is opened first and the urging force of the urging spring is eliminated. Since the non-reference side field bar can be opened, there is no inconvenience such as misalignment of the material placed in the lower mold.

[Brief description of the drawings]

FIG. 1 is a plan view of a transfer feeder according to an embodiment of the present invention.

FIG. 2 is a side view of the transfer feeder.

FIG. 3 is a rear view of the transfer feeder.

FIG. 4 is an explanatory diagram of a clamping operation in the present invention.

FIG. 5 is an explanatory diagram of an unclamping operation in the present invention.

FIG. 6 is an explanatory diagram of the operation of the transferer.

FIG. 7 is an explanatory view of a clamping operation of works of different lengths in the related art.

FIG. 8 is an explanatory view of an unclamping operation of works having different lengths in the related art.

FIG. 9 is an explanatory diagram of a configuration in which a stopper surface is provided on a lower mold of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Feed bar 2 Feed bar 7 Elevating frame 8 Elevating frame 21 Slide rail 22 Carriage 31 Slide guide M1 1st servo motor M2 2nd servomotor

Claims (1)

[Claims] 1. A transfer feeder in which a pair of a non-reference side feed bar and a reference side feed bar open and close, move up and down, and move back and forth, a first servomotor for opening and closing the anti-reference side feed bar, and the reference side feed bar. A transfer feeder comprising a second servomotor for opening and closing a bar, and independently controlling the operation of the first and second servomotors.