JPH0822479B2 - A method for processing a small number of workpieces using a transfer press machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work machining method suitable for machining a work having a small number of steps by a transfer press device having a knockout mechanism.

(Prior Art) A conventional transfer press device is, for example, a fifth one.
There are some as shown in the figure.

This apparatus installs five sets of dies 2 to 6 on the bolster 1a and the slide 1b of the press machine 1 while aligning them linearly, and at the top of the lower dies of the molds 2 to 6 on the press machine 1. A normal transfer mechanism 7 for moving a work and a work input device 8 for arranging the work at a work supply position to the transfer mechanism 7 are provided, and the work input device 8 is supplied from the work supply device 9 to the conveyor. The work is supplied via 10 and a part feeder 11 which aligns and sends the work.

In such a transfer press machine, as shown in FIG. 6, the work loading device 8 first operates the finger cylinder by operating the air cylinder 8a for each stroke of the press machine 1.
8b is moved forward to transfer the work 12 supplied from the work supply device 11 to the work input device 8 by the transfer mechanism 7
To the work feed position A, and then the feed bar 7a of the transfer mechanism 7 having the fingers 7b moves along a circulating path in horizontal and vertical planes as indicated by arrows a to f in the figure. In particular, the work pieces 12 are sandwiched by the fingers 7b from both sides and sequentially moved onto the lower molds of the molds 2 to 6, and the molds 2 to 6 press the work pieces 12, and then the feed bar is used. The work 7a further moves the work 12 on the lower mold of the mold 6 to above the work discharge chute 13 and inserts it therein.

Therefore, according to this transfer press device, the work
The work 12 can be formed into a predetermined shape by sequentially performing press working of 5 steps on the work 12.

(Problems to be Solved by the Invention) By the way, in the above-mentioned conventional transfer press apparatus, the press machine 1 is used even when processing a work having a small number of steps.
Since only one work piece can be processed per stroke, there is a problem that productivity is low compared to the equipment cost when applied to a small number of work pieces.To solve this problem, even in the intermediate position of the press machine. When a work is loaded, a complicated device such as a robot is required to load the work in order to prevent interference with the transfer bar 7a that operates three-dimensionally and the upper die of the press die. There was a problem that it became bulkier.

The present invention provides a work processing method that advantageously solves such problems.

(Means for Solving Problems) A method of processing a small number of work pieces by a transfer press device according to the present invention is a work supply position to a transfer mechanism when a small number of work pieces are processed by a transfer press device having a knockout mechanism. The work is supplied to the work holder, and the work is supplied into the work holder arranged below the transfer mechanism at an intermediate position of the press mechanism, and the work in the work holder is lifted to the work transfer position by the knockout mechanism, It is characterized in that the works located at the supply position and the work transfer position are respectively transferred by the transfer mechanism into press dies adjacent to those positions, and the works are respectively processed by the press dies.

(Operation) According to this method, the work is supplied into the work holder arranged below the transfer mechanism, the work is lifted by the knockout mechanism of the transfer press device, and the work is supplied to the work supply position by the transfer mechanism. Since the work is conveyed into the press die, it is possible to supply the work to the intermediate position of the press machine with an extremely simple structure. This allows the transfer press device to provide a plurality of works per stroke of the press machine. Can be processed to increase productivity.

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

FIG. 1 (a) is a plan view showing an embodiment in which the work machining method of the present invention is applied to a transfer press device for the next push forging of a helical gear, and FIG. 1 (b) is a view taken in the direction of arrow C. In the figure, the same parts as those in FIGS. 5 and 6 are designated by the same reference numerals. That is, here, 1a indicates a bolster of the press device 1, 7a and 7b indicate feed bars and fingers of the transfer mechanism 7, and 8b indicates a finger of the work input device 8.

The press device 1 here has the ejector rod 14 mounted on the bolster as the slide (not shown) rises.
It has a knockout mechanism (not shown) that projects upward from the upper surface of 1a. Here, three sets of dies 15b of the same mold 15 and two work holders 16 are alternately arranged on the bolster 1a. The press machine 1 on the slide (not shown), the punch 15 of the die 15
The a is vertically aligned and attached to the die 15b.

Here, the work holder 16 has, as shown in FIG. 2 (a), a cylindrical work lifting hole 16a penetrating in the vertical direction in the center thereof, and an annular step in the middle of the work lifting hole 16a. Further, it has a portion 16b, and further has a work passage 16c having a rectangular cross section, which communicates with the work lifting hole 16a above the side surface and the annular step portion 16b.

Here, a cylindrical knockout pin having a flange 17a on the outer periphery of the lower end portion in the work lifting hole 16a of the work holder 16 and having a length substantially equal to the length from the lower surface of the work holder 16 to the lower surface of the work passage 16c. While arranging 17, the one end of a work guide 18 having a substantially U-shaped cross section is fixed to the side surface of the work holder 16 so as to be aligned with the work passage 16c, and above the work guide 18. An opening of a chute 19 guided from the parts feeder shown in the figure is arranged, and at the other end of the work guide 18, a work insertion device 8 for moving the finger 8b forward and backward by the operation of the air cylinder 8a is provided.

As shown in FIG. 3 (a), the die 15b has a work insertion hole 15c extending in the vertical direction at the center, and a tooth portion of the helical gear at the lower end of the work insertion hole 15c. It has a molding portion 15d having a shape corresponding to the shape, and further has a bent work discharge hole 15e communicating with the side surface of the die 15b of the molding portion 15d.

In such a transfer press device, from the parts feeder, a work input device 8 provided near the end of the feed bar 7a as shown in FIG. 1 and a work guide 18 as shown in FIG. 2 (a). When a work 20 which is a disk-shaped steel material is supplied to the front of each finger 8b with the work inserting device 8 provided at the end of the feed bar 7a, first, as shown in FIG. Work input device 8 in the vicinity
Moves the finger 8b forward by the operation of the air cylinder to position the work 20 at the work supply position A to the transfer mechanism 7, and at the same time, it is provided at the end of the work guide 18 as shown in FIG. 2 (b). The work loading device 8 moves the fingers 8b forward by the operation of the air cylinder 8a to move the work 20
Is moved onto the knockout pin 17 in the work lifting hole 16a of the work holder 16.

Next, here, as shown in FIG. 2 (c), the press machine 1 causes the ejector rod 14 to project, whereby the knockout pin 17 is lifted to move the work piece 20 as shown in FIG. 1 (b). The transfer mechanism 7 is positioned at the work transfer position B.

Then, here, the feed bar 7a is sequentially moved in the directions of arrows a to d shown in FIG. 6, and the work 20 is held by the fingers 7b and is moved above the die 15b as shown in FIG. 3 (a). After being moved, they are separated from each other by moving in the direction of arrow e in FIG. 6, and the work 20 is loaded into the work insertion hole 15c of the die 15b as shown in FIG. 3 (b). At this time, the work 20 in the middle of processing remains in the forming portion 15d of the die 15b, and the introduced work 20 is placed on the work 20 in the middle of processing.

Further, here, as shown in FIG. 3 (c), the punch 15a descends as the slide of the press machine 1 descends, and the work 20 is pushed into the forming portion 15d. 20 is further processed to become a work 21 having almost the shape of a helical gear, and its forming portion 15d
Is ejected to the side of the die 15b through the work discharge hole 15e. At this time, the work 20 directly pressed by the punch 15a remains in the forming portion 15d during the processing.

After that, the punch 15a rises, and along with this, the feed bar 7a moves in the direction of arrow f in FIG. 6 and returns to the initial state.

Therefore, according to this transfer press device, the work holder 16 having a simple structure is used to transfer the transfer device 7 to the transfer device 7.
Since the individual works 20 can be conveyed at the same time, and by this, the three works 20 can be simultaneously next-press-forged by the three sets of molds 15, it is possible to secure high productivity with a small equipment cost. .

FIG. 4 shows another embodiment of the present invention. In this embodiment, the work input device 8 for supplying the work 20 to the work holder 16 of the transfer press device used in the previous embodiment is eliminated. The chute 19 is tilted and directly connected to the work passage 16c, and the work passage 16c is also tilted, and the other configurations are similar to those of the previous example. And also in this example,
Knockout pin 17 in work holder 16 allows work 20
Is positioned at a work transfer position which is an intermediate position of the press machine 1.

According to such a method, the work 20 can be applied to the case where the work 20 is large to some extent or the surface thereof is sufficiently smooth and the work 20 can move on the slope due to its own weight, and the productivity can be improved similarly to the previous embodiment. The equipment cost can be further reduced.

Although the present invention has been described above based on the illustrated example, the present invention is not limited to the above-mentioned example, and can be applied to a case where a workpiece processed in two steps is processed by a transfer press device of five steps. In this case, one work holder is provided so that two works can be simultaneously processed by one stroke of the press machine. And, of course, the present invention can be applied to a transfer press apparatus having more steps.

(Effect of the Invention) Thus, according to the method of the present invention, when processing a small number of work pieces, the transfer press machine can process a plurality of work pieces for each stroke of the press machine with a small equipment cost. Productivity can be increased.

[Brief description of drawings]

1 (a) and 1 (b) are a plan view and an arrow C view illustrating an apparatus used for carrying out a method for processing a small number of works by a transfer press apparatus of the present invention, and FIGS. 2 (a) to 2 (a). FIG. 3C is an operation explanatory view showing an operation state of the work holder of the above apparatus, FIGS. 3A to 3C are operation explanatory views showing an operation state of the mold of the above apparatus, and FIG. FIG. 5 is a sectional view showing a work holder of an apparatus used in another embodiment of the invention, FIG. 5 is a front view showing the entire conventional transfer press apparatus, and FIG. 6 is an operation explanatory view showing an operating state of the conventional apparatus. Is. 1 ... Pressing device, 1a ... Bolster 7 ... Transfer mechanism, 7a ... Feed bar 7b ... Fingers, 8 ... Work loading device 8a ... Air cylinder, 8b ... Fingers 14 ... Ejector rod, 15 ... … Mold 15a …… Punch, 15b …… Die 16 …… Work holder, 17 …… Knockout pin 20 …… Work

Claims (1)

[Claims] 1. When processing a work with a small number of steps by a transfer press device having a knockout mechanism, the work is supplied to a work supply position to the transfer mechanism and is arranged below the transfer mechanism at an intermediate position of the press mechanism. The work in the work holder, lifts the work in the work holder to the work transfer position by the knockout mechanism, and moves the work located at the work supply position and the work transfer position to those positions by the transfer mechanism. A method for processing a small number of work pieces by a transfer press machine, characterized by transporting the work pieces into adjacent press dies and processing the work pieces by the press dies.