JPH0773756B2 - Transfer feeder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a transfer feeder that is installed in a transfer press to transfer a work, and more particularly to a transfer feeder that enables high-speed transfer of a work by using a linear motor as a drive source. Pertain.

[Conventional technology]

Conventionally, the transfer feeder equipped in the transfer press has a pair of transfer bars arranged in parallel in the work transfer direction, and the work is transferred to each processing station by operating these transfer bars in two or three dimensions. And the loading and unloading of works.

Further, as a drive mechanism for driving the transfer bar, the cams are rotated by the power taken out from the press body, the levers are swung by these cams, and the operation of these levers is transmitted to the transfer bar to transfer the transfer bar to the transfer bar.
One-dimensional or three-dimensional operation is performed, or a servo motor is provided for each drive system, and the transfer bar is operated in two-dimensional or three-dimensional directions by these servo motors.

[Problems to be solved by the invention] However, in any driving method, the work stop position varies due to chatter vibration generated by acceleration when starting and stopping the transfer bar, or the work pops out from the finger, Has problems such as easy interference with slides and molds, and there is a limit to speeding up by itself. There was a problem that we could not respond to requests such as improving the quality.

Further, in the case where the crossbars are laid horizontally on each transfer bar at a constant pitch and the work is conveyed by the work suction means provided on each crossbar, since the conveyance pitch is constant, the pitches of the processing stations are different. The transfer press cannot transfer the work, and in the transfer press where there is an upright between the processing stations, the transfer station has an idle station at the upright and cannot be transferred to the next processing station without passing through this idle station. There were also problems such as increasing the distance between all processing stations.

The present invention has been made to solve these problems, and a linear motor is provided on each of a plurality of carriers,
By providing a transfer feeder in which each carrier can be independently driven, it is possible to easily cope with a press that performs high-mix low-volume production.

[Means and Actions for Solving the Problems]

In order to achieve the above object, the present invention provides a pair of guide rails, which are vertically movable by a lifter, in the press main body in parallel along the work conveying direction, and the guide rails are provided with a plurality of carriers. Each of them is provided with a linear motor so that each carrier can independently move independently, and a crossbar having a work holding means is laid horizontally between the carriers facing each other across the machining station. Work can be carried by moving each carrier at high speed, and work can be carried by controlling the linear motor of each carrier even when the pitches of the processing stations are different.

〔Example〕

 An embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, reference numeral 1 is a transfer press main body, 2 is a transfer feeder installed in the press main body 1, and has a pair of guide rails 3 arranged in parallel along a work transfer direction (arrow A).

These guide rails 3 are long so as to reach from the work carrying-in side to the work carrying-out side of the press body 1, and a plurality of lower parts are supported by the lifter 5 via the guide posts 4 so as to be vertically slidable. The lift means 6 such as a lift cylinder provided in each lifter 5 can be moved up and down while maintaining the horizontal state.

A plurality of carriers 8 are movably supported along the guide rails 3 at positions facing each other of the guide rails 3.

These carriers 8 are linear motors 9 as shown in FIG.
The interior of the vehicle is equipped with a linear motor 9 so that it can be independently driven by the linear motor 9.

The linear motor 9 has a primary coil 9a on the carrier 8 side,
The secondary conductor 9b is laid on the guide rail 3 side so as to face the primary coil 9 (the secondary conductor 9b on the carrier 8 side).
, And the primary coil 9 may be provided on the guide rail 3 side). By feeding power to the primary coil 9a, the carrier 8 can be run along the guide rail 3 at an arbitrary speed. ing.

On the other hand, a tilt mechanism 10 is provided on a carrier 8 provided on the guide rail 3 so as to face each other, and both ends of a crossbar 11 are supported between the tilt mechanisms 10.

The tilt mechanism 10 is for rotating the crossbar 11 at an arbitrary angle, and the posture of the work 12 can be changed during conveyance. A work holding means 13 such as a vacuum cup for holding the work is provided at a plurality of places.

Next, the operation will be described. The work 12 carried in on the upstream side of the press body 1 is held by the work holding means 13 of the crossbar 11 positioned on the most upstream side of the guide rail 3.

In addition, the work 12 that has been machined at each machining station W ₁ , W ₂ ... is moved to each machining station W ₁ ... crossbar.
It is held by 11 work holding means 13.

After that, the guide rails 3 are lifted to a predetermined height while maintaining the horizontal state by the lift means 6 of each lifter 5, and then the linear motor 9 of each carrier 8 is supplied with electric power. Moved on 3 at high speed.

The work holding means 13 provided on the most upstream crossbar 11 is moved to the first processing station W ₁ , the other work holding means 13 is moved to the next processing station W _2, ... And further on the most downstream crossbar 11. The guide rails 3 are lowered when the work holding means 13 provided are conveyed to the carry-out station, and the works 12 held by the work holding means 13 are released.

After that, when the guide rail 3 rises again, each carrier 8 is returned to its original position by the linear motor 9 and stands by for the next conveyance.

Hereafter, the vertical movement is repeated to convey the work 12,
By changing the posture of the work 12 by the tilt mechanism 10 during the work transfer, the work 12 can be transferred without interfering with the slide or the mold.

Further, by controlling the linear motor 9 to change the movement distance of the carrier 8, it becomes possible to carry the work when the pitches of the processing stations W ₁ ... Are different. When the pitch of the processing stations W ₁ ... is different as shown in Fig. ₂ , it was necessary to provide the idle station i ₁ between the processing stations W ₁ and W ₂ , but in the transfer feeder of the present invention, the idle station i ₁ is not provided. , It is possible to directly transfer from the processing station W ₁ to the next processing station W ₂ .

Further in the conventional a moving bolster 1a drawn out from the die replacement time press body within 1, since the pitch of the working station W _4, W ₅ was carried into the direction of arrow a of FIG. 5 is constant, the further direction of arrow b Although it was necessary to move the work 12, the transfer feeder of the present invention enables the work 12 to be conveyed at the position where the work 12 is carried into the press body 1. Therefore, the operation of moving the moving bolster 1a in the direction of the arrow b is not required.

Further, in the above embodiment, the transfer feeder which operates in two dimensions is described, but it is also applicable to the transfer feeder which operates in three dimensions.

〔The invention's effect〕

As described in detail above, according to the present invention, a carrier that can be independently moved by a linear motor is provided on a guide rail that can be lifted and lowered by a lifter, and a crossbar is horizontally installed between carriers that face each other. The work holding means provided on the crossbar is used to carry in and out the work and carry it to each processing station.Since it does not require a transfer bar with high rigidity as in the conventional case, the inertia during lift is small and Since the work is transported by moving the carrier, chatter vibration is hardly generated due to acceleration at start and stop compared to the case of driving a transfer bar having high rigidity and large weight, which results in positional accuracy. Higher transport is possible.

In addition, since each carrier can be independently self-propelled by the linear motors provided for each carrier, the linear motor of each carrier can be adjusted so that the carrier self-propels in accordance with the pitch even in a press having a different pitch at the processing station. By controlling it, the work can be transported, and since there are uprights between the processing stations,
Even with a press that had to have an idle station, it is possible to transfer workpieces without providing an idle station, so the distance between all processing stations can be reduced, which shortens the time from material loading to product unloading. , Productivity is also improved.

Moreover, high-speed conveyance is possible by operating the carrier at high speed, so that it is possible to significantly improve the productivity by adopting it in a press for high-mix low-volume production.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall perspective view, FIG. 2 is a perspective view of a transfer feeder, FIG. 3 is an enlarged view of the vicinity of a carrier, and FIG. FIG. 5 and FIG. 5 are explanatory views of the operation. 1 is a press body, 3 is a guide rail, 5 is a lift, 8 is a carrier, 9 is a linear motor, 11 is a crossbar, 13 is a work holding means, and A is a work conveying direction.

Claims (1)

[Claims] 1. A pair of guide rails 3 which are vertically movable by a lifter 5 are arranged side by side in a press body 1 along a work conveying direction A, and a plurality of carriers 8 are provided on the guide rails 3. Each of the carriers 8 is provided with a linear motor 9 so that each carrier 8 can independently move, and a crossbar 11 having a work holding means 13 is provided between the carriers 8 facing each other with a machining station interposed therebetween. A transfer feeder that is placed horizontally.