JPS597560B2 - Type selection device by NC - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that unit mold sets are mounted side by side at regular intervals on the bolster of a press, and a striker corresponding to the unit mold set is installed on the lower surface of the slide of the press from a position directly above the unit mold set to an adjacent unit mold. The present invention relates to an NC-based mold selection device which is provided so as to be slid to a central position directly above the set, and which selects and moves a striker to the position directly above the unit mold set using the NC, depending on the unit mold set to be used.

A unit mold set refers to a mold in which an upper mold is assembled into a lower mold so as to be able to rise and lower, and is positioned at the upper limit by the biasing force of a spring, and the upper mold is pushed down by a striker to perform pressing work.

In conventional NC type selection devices, each striker is provided with a cylinder for moving the striker, and the compressed air supplied to this cylinder is controlled by NC.

Therefore, as the number of strikers increases, it is not easy to secure a place to install the cylinders, and the equipment costs are high.

The object of the present invention is to eliminate these drawbacks by providing a bar across each striker in the direction of its movement, and connecting this bar to a cylinder so that the desired striker can be moved by engaging the bar. It is an object of the present invention to provide an NC-based mold selection device that requires only one moving cylinder, has a compact structure, and is reliable in operation.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, a set of eight unit molds 5 is shown mounted on the bolster 1 of the press.

A plate 2 mounted on a bolster 1 is provided with guide blocks 3, 3 in a direction perpendicular to the feed center line S--S of the material to guide a plate 4.

A unit mold set 5 is mounted on the plate 4 at a constant pitch in the material feeding direction S and facing in a perpendicular direction.
are installed side by side.

The plate 4 is positioned along the guide block 3 and fixed so that the mold part 5a is on the feed center line S-S.

The mold section 5a of each unit mold set 5 incorporates a set of upper and lower molds of different types necessary for processing.

3, 4 and 5, eight strikers 6 are shown which are provided on the lower surface of the slide 7 of the press in correspondence with the unit type set 5, respectively.

Attach plate 8 to the bottom surface of slide 7, and
Guide plates 9 for guiding each striker 6 in the above-mentioned material feeding direction S are provided on both sides of the lower surface.

Each striker 6 moves from the position directly above each unit mold set 5 to the center position directly above the adjacent unit mold set 5, that is, to the position 1/2 the pitch between the unit mold sets 5 away from the guide plate 9. The strikers d\ are guided and slidable, and on the lower surface of the plate 8 there is a positioning stopper 11 for stopping each striker 6 at the center position.
Two are planted in each.

Four grooves 12 are provided on the lower surface of the plate 8 in the direction of movement of the restriker 6 through the position of the stopper 11.

A spring guide pin 13 whose left end is fixed to each stopper 11 and extends into the groove 12 is provided, and a guide hole 20a of the guide block 20 protruding from the striker 6 into the groove 12 is provided.
The tip of the spring guide pin 13 is inserted into.

A spring 16 mounted on the spring guide pin 13 urges the striker 6 to the right as shown in FIGS. 3 and 4, and positions the striker 6 by pressing it against the positioning stopper 11.

A convex guide groove 8a that crosses above the center of each striker 6 is provided on the lower surface of the plate 8, as shown in FIGS. 3 and 5, and a guide groove 8a is provided on the upper surface of each striker 6.
A guide block 10 is embedded at position a.

The striker 6 has an air chamber 1 at the bottom of the guide block 10.
5 and an air passage 15a leading to the air chamber 1.
5 accommodates a pin 17 that is pushed up by air pressure and pushed down by a spring 14, passes through the guide block 10, and protrudes and retracts from the upper surface of the striker 6.

Compressed air is supplied to and discharged from the air passage 15a under NC control.

The striker 6 is fitted into the convex portion of the guide groove 8a of the plate 8.
A bar 19 is slidably received on the upper surface of the guide block 10, and the bar 19 has a hole 19a through which the pin 17 protrudes and fits when each striker 6 is in contact with the positioning stopper 11. They are provided at the same constant pitch as the mold set 5.

One end of the bar 19 is connected to a piston rod of a cylinder 18 fixed to the side of the plate 8.

When the cylinder 18 is supplied with compressed air and moved forward, the bar 1
9 has moved to the left as shown in FIG. 3, and the striker 6a with the pin 17 protruding has moved together with the bar 19 to a position directly above the corresponding unit type set 5.

The holes 19a of the bar 19 corresponding to the other strikers 6 are located directly above the corresponding unit type set 5, and are visible from below as shown in the figure.

When the cylinder 18 is moved backward by compressed air, the biasing force of the spring 16 corresponding to the striker 6a is also applied, causing the striker 6a to move to the right together with the bar 19 and return to the position of the positioning stopper 11.

Next, we will discuss the effect.

Figure 6 is a diagram showing the timing of the operation of each member, where the top dead center and bottom dead center indicate the upper and lower limit positions of the slide 7 of the press, and the angles O0 and 180° indicate the crank angle of the press. .

In the figure, the crank is turned clockwise. If the selection order of the unit mold set 5 required for press working is given to the NC in advance, the necessary signals will be output in the required order at the required time, compressed air will be supplied and discharged to the air passage 15a of the required striker 6, and the corresponding action will be taken. Pressing is performed by moving the unit mold set 5 directly above the unit mold set 5.

First, compressed air is supplied to the air chamber 15 of the striker 6 corresponding to the unit type set 5 to be used for the next press process, and the pin 17 is raised to fit into the hole 19a of the bar 19.

A striker 6 that ensures this movement is pressed against a positioning stopper 11 by a spring 16.

Subsequently, compressed air is supplied to the cylinder 18, and the cylinder 1
8 moves the bar 19 by a fixed stroke length, and with it the selected striker 6 to a position directly above the required unit type set 5.

Next, while the slide 7 of the press descends to the bottom dead center, the lower surface of the striker 6 comes into contact with the upper surface of the unit mold set 5 and presses it down to perform press working.

Subsequently, while the slide 7 is rising, the cylinder 18 retreats, and the striker 6 returns together with the bar 19. Subsequently, the air chamber 15 is exhausted, the pin 17 descends, and the engagement between the striker 6 and the bar 190 is released.

Next, unit mold set 5 to be used for the next press process.
When the corresponding striker 6 is selected and the NC signal is output, the above-mentioned process is repeated to continue the work.

As is clear from the above description, according to the present invention, when the strike force corresponding to the required unit type set is selected by NC, the striker and the bar 19 are engaged, so that only one cylinder is required to move the striker. This makes the structure more compact.

Therefore, it is easy to equip the press slide, and there are effects and advantages such as saving design and equipment man-hours.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the bolster section to which a unit type set is attached as in the conventional case, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a bottom view of the slide equipped with the embodiment. 4 is a sectional view taken along line BB in FIG. 3, FIG. 5 is a sectional view taken along line CC in FIG. 3, and FIG. 6 is an operation timing chart of the embodiment with respect to the crank angle of the press. 1 is a bolster, 2 is a plate, 3 is a guide block, 4
is a plate, 5 is a unit type set, 6 is a striker,
7 is a slide, 8 is a plate, 8a is a groove, 9 is a guide plate, 10 is a guide block, 11 is a positioning stopper, 12 is a groove, 13 is a spring guide pin, 14 is a spring, 1
5 air chamber, 16 spring, 17 pin, 18 cylinder, 19 bar, 19a hole, 20 guide block winter,,
It is.

Claims (1)

[Claims] 1 A plurality of unit mold sets 5 are arranged in a row at a constant pitch along the material feed line on the bolster 1 of the press machine, and on the other hand, a plurality of unit mold sets 5 are arranged on the lower surface of the plate 8 fixed to the slide 7 of the press, corresponding to each unit mold set 5. A striker 6 is provided so as to be reciprocally movable from a position directly above the unit type set 5 to a center position separated in the same direction along the feed line by 1/2 of the constant pitch, and the striker 6 is mounted on the plate 8 from the position directly above the unit type set 5 to the center position. A spring 16 that urges the striker 6 toward the central position and a positioning stopper 11 that positions the striker 6 at a central position are provided.
A groove 8a is provided on the lower surface of the plate 8 along the feed line and across the upper part of each striker 6, and a bar 19 is slidably fitted into the groove 8a. The bar 19 is provided with holes 19a that engage with the pins 17 at the constant pitch, and the holes 1
A cylinder 18 is provided for reciprocating the striker 9a in the same range as the striker 6, compressed air is supplied and discharged to the air chamber 15 of each pin 17 by NC control, and the operation of the cylinder 18 is linked with this. Type selection device by NC.