JPH0771705B2 - Transfer press work-in device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work loading device for a transfer press, which allows a work to be loaded into a press main body from a dedusting point by a transfer aber.

Conventional technology Conventional transfer presses have a dust stacker installed at a dust stack point on the work loading side. is doing.

However, installation of a work transfer means such as a vacuum cup or a magnet conveyer causes a problem in that the equipment cost increases and maintenance costs a lot.

Problems to be Solved by the Invention In order to improve the above-mentioned problems, a method of transferring a work from a dust stack point by a transfer feeder has already been proposed.

However, in order to shorten the work transfer cycle time and to transfer the work smoothly, the transfer evader of the transfer feeder operates in advance as shown in Fig. 8 (a), where advance is already started at the rising point of the transfer eva. Since it is operating, it becomes difficult to transfer the work to the finger at the ascent point of the transfer aber, resulting in frequent mis-grip of the work and inconvenience such as not being applicable to the transfer feeder with variable lift stroke. It was

The present invention has been made for the purpose of improving the above problems.

Means and Actions for Solving Problems In order to achieve the above object, the present invention is directed to a destack point installed on the work loading side of a transfer press having a transfer bar that operates three-dimensionally, and to the destack point. A pick-up mechanism that raises the transferred work to the work transfer position set during the lift of the transfer bar, transfers it to the finger provided on the transfer bar, and retracts the suction means to a position where it does not interfere with the work after transfer The work can be transferred without the suction means and the work interfering with each other, and since the transfer of the work is completed before the transfer bar reaches the rising point, the advance operation can be performed before the transfer bar reaches the rising point. Can be started, which will shorten the cycle time. .

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

In the figure, 1 is a transfer press, and 2 is a main body of this apparatus installed on the work loading side of the transfer press 1.

The main body 2 has a lift device 3, and the work 5 placed on the pallet 4 is lifted to a work loading position by a lift cylinder 3a of the lift device 3.

In addition, above the lift device 3, supported on a pedestal 6,
A pick-up mechanism 7 is installed. The pick-up mechanism 7 is composed of a plurality of suction means 8 such as vacuum cups or magnet lifts, and the suction means 8.
The pickup cylinder 9 is a dual stroke cylinder that moves up and down in two steps.

Plural pick-up cylinders 9 are attached to the upper part of the pedestal 6 so as to stand upright, and an elevating member 10 is fixed to the tips of piston rods 9a protruding downward from the pick-up cylinders 9.

The suction means 8 is detachably attached to the lower surface of the elevating member 10 via a coupler 8a.
The work 5 adsorbed by is transferred to the transfer feeder 11.
At the time of the clamping process of the transfer cover 12 provided in the transfer cover 12, the transfer cover 12 is transferred to the finger 13 protruding from the transfer cover 12.

The transfer feeder 11 has a pair of transfer bervers 12 which are parallel to each other between the uprights 1a of the transfer press 1 along the conveyance direction (arrow A) of the work 5, and these transfer berbers 12 have a feed drive mechanism and a feed drive mechanism. The lift drive mechanism (both not shown) moves upward (up), advance, descend (down) and return as shown in FIGS. 8A and 8B, and the clamp drive mechanism 14 clamps and unclamps. The workpiece 5 gripped by the finger 13 is three-dimensionally operated in the direction, and is sequentially conveyed to a processing station in the transfer press 1 through a plurality of idle stations i _{0 to} i ₃ .

On the other hand, the transfer amplifier 12 of the transfer feeder 11
Has an extension bar 12a attached to the end of the main body 2 side.

The extension bar 12a reaches the inside of the main body 2, and the finger 13 is attached inside the main body 2 as shown in FIG. 4, and the workpiece 5 is transferred from the dust point by the pick-up mechanism 7 as follows. It is going to be done.

Next, the operation will be described. The main body 2 mounted on the pallet 4
The work 5 carried in is lifted to the work carry-in position by the lift cylinder 3a of the lift device 3.

After that, the pick-up cylinder 9 composed of a dual stroke cylinder is first lifted by one step while being sucked by the suction means 8 which is lowered by the pick-up cylinder 9, and moves the work 5 to a height where the finger 13 and the work 5 do not interfere with each other during the clamping process. To raise.

Next, in the clamping process of the transfer fiber 12, the fingers 13 attached to the transfer fiber 12 enter the lower side of the work 5, and the suction means 8 releases the work 5, so that the work 5 is delivered to the finger 13. Be done.

After that, the suction means 8 is further raised by the pick-up cylinder 9 to the position shown by the phantom line in FIG. 7, and even if the transfer bar 12 rises, the suction means 8 is retracted so that the work 5 and the suction means 8 do not interfere with each other. As a result, the transfer of the work 5 is completed before the transfer aber 12 starts the advance operation, so that the finger 13 can prevent misgripping of the work 5, and the transfer feeder 12 can change the lift amount of the transfer aber 12. It can be applied to.

By removing the suction means 8 from the coupler 8a, the semi-molded product 5a can be directly carried in to the dust stack point by the roller conveyor 15, and can be carried in to the transfer press 1 by the finger 13 provided in the extension bar 12a. It is possible (see FIG. 6).

Further, in the figure, 16 is a double blank detecting cylinder, and 17 is a double blank dispensing cylinder for discharging the double blank from the line when the double blank is detected by the double blank detecting cylinder 16.

On the other hand, reference numeral 20 denotes a skid shift cylinder, which has the following functions.

That is, when the work 5 is conveyed from the destructive point to the processing station by the transfer cover 12, if the size of the work 5 is larger than the feed stroke of the transfer cover 12, the works 5 interfere with each other and the conveyance becomes difficult.

Therefore, the idle stations i ₁ , i ₂ , i ₃ are shown in FIG. 2 and FIG.
A skid (idle cradle) 21 that can be shifted in the feed direction A by a skid shift cylinder 20 as shown in the figure is installed, and when the work 5 is placed on the skid 21, the press angle is approximately 150 ° to 210 °. During this period, pressure is supplied to the skid shift cylinder 20 to shift the skid 21 in the feed direction A by a distance 1 as shown in FIG. By repeating this operation for each of the idle stations i _{1 to} i ₃ , it becomes possible to convey the works 5 larger than the feed stroke without interfering with each other.

The skid 21 has a permanent magnet (not shown) or an electromagnet embedded in its upper surface, so that when the skid 21 shifts,
It is designed to prevent the work 5 on 21 from shifting.

Further, by using a variable stroke cylinder for the skid shift cylinder 20, it can be applied to the transfer feeder 11 in which the feed stroke can be changed.

EFFECTS OF THE INVENTION As described in detail above, according to the present invention, after the work adsorbed from the dust stack point is transferred to the transfer bar by the transfer mechanism that operates in two stages, the suction means is retracted to a position where it does not interfere with the work. As a result, the work can be handed over as the transfer rise begins. As a result, even if the advance operation starts before the transfer upper reaches the ascending point, there is no risk of the fingers mis-gripping the work, the work can be transported reliably, and the conventional stacking point can be used. Compared to the one in which the work is carried into the idle station by using the carrying means, the carrying means is unnecessary, so that the price can be reduced and the maintenance management can be facilitated. In addition, since semi-finished products can be transported from the dust stack point, the flexibility of the products is high, and if skid shift cylinders are provided in the idle station so that they can be shifted downstream. It is also possible to carry in a work larger than the eid stroke. Furthermore, since the workpiece is transferred from the suction means to the fingers at the workpiece transfer position set during the transfer bar lift, even if the transfer feeder has a variable transfer stroke, the pickup can be picked up every time the lift stroke is changed. Since it is not necessary to change the stroke of the cylinder, the pickup cylinder can be controlled easily, and even if the work cannot be delivered at the work transfer point due to the delay in the release operation of the suction device, the retraction speed of the suction device and the relative transfer Since the difference in speed is small, it is possible to deliver the work stably.

[Brief description of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is an explanatory view of a finger provided on an extension transfer fiber, and FIG. Is V in FIG.
From the direction of the arrow, FIG. 6, FIG. 7, and FIG. 8 (a),
(B) is an operation explanatory view. 1 is a transfer press, 5 is a work, 7 is a pick-up mechanism, 8 is a suction means, 12 is a transfer cover, and 13 is a finger.

Claims (1)

[Claims] 1. A destack point installed on the work loading side of a transfer press 1 having a transfer bar 12 that operates three-dimensionally, and a work 5 loaded at the destack point is placed in the middle of lifting of the transfer bar 12. The work is carried into the transfer press provided with a pickup mechanism 7 which moves up to the set work transfer position, transfers it to the finger 13 provided on the transfer bar 12, and retracts the suction means 8 to a position where it does not interfere with the work 5 after the transfer. apparatus.