JPS6010739Y2 - Workpiece take-out device in bulge forming equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for forming a pipe material into a workpiece having a corrugated pipe shape in a bellows region by bulge forming, and then taking out the formed workpiece.

Various types of seed extraction devices have been proposed in the past, but all of them have disadvantages such as relatively complex structures and unsmooth operation.

The purpose of the present invention is to obtain a device that eliminates such inconveniences, and the pressing plates 1 and 2 can be opened and closed vertically.
A plurality of divided plates 3, 3, etc., which are slidable at equal intervals in the lateral direction, are attached to the inner surfaces facing each other, and an upper split mold 4, which is slidable at equal intervals in the lateral direction. A plurality of movable dividing plates 5,
The material pipe 7, which is sandwiched and supported between the two split molds 4 and 6, is opposed to the lower split mold 6 that is hollowed out from 5. In the bulge forming apparatus, the bulge forming apparatus is configured to perform bulge forming by applying a pressing force to the upper split die 4, and the hydraulic pressure is used to removably hold the processed material pipe 7 between the split plates 3, 3, . . . It is characterized in that a piston 8 is connected.

The dividing plates 3, 3, . As disclosed in the publication, they are connected sequentially through known parallel links (not shown) and are kept at equal intervals from each other, and are connected to the hydraulic piston 8 at the end plate at the outer end. Furthermore, the dividing plates 5, 5, . . . were made to slide on the guide bar 12 in substantially the same manner, and the hydraulic piston 9 was connected to the split mold 6 in the same manner.

The hydraulic pistons 8 and 9 are connected to the hydraulic power source 10 through respective excitation operation switching valves 13 and 14 in their respective outer chambers.

The material pipe 7 is supplied with high-pressure liquid through liquid supply pipes 15, 15 on both sides thereof, and both pipes 15, 15.
shall be compressed in the axial direction between the tips of the

Next, we will explain the operation of the material pipe 7 as described above.
The internal pressure of high-pressure liquid and the pressing force in the axial direction are applied to the pipe 7 while it is supported between the upper and lower split molds 4 and 6 to form a bellows-shaped workpiece. The hydraulic piston 8゜9 is in an inactive state, and therefore the dividing plates 3゜3... and 5, 5... can freely slide and close according to the deformation of the pipe 7. When the work is completed, the lower piston 9 is left as it is, and only the upper piston 8 is connected to the hydraulic power source 10 to operate it to the closing side, that is, to the side where the dividing plates 3, 3, etc. are mutually closed. Then, the press plates 1, 2 and therefore the split molds 4, 6 are opened vertically to each other.

In this case, as shown in the third figure, the workpiece to be removed from the pipe 7 is fitted and supported by the upper split die 4 due to its own springback action and the pressing force on the closing side of the hydraulic piston 8, and is removed together with it. Since the piston 8 moves upward, if the piston 8 is then returned to the inoperative state in which the connection with the hydraulic power source 10 is cut off, the workpiece loses its holding force and falls under its own weight.

Therefore, for example, if a support piece 16 is made to protrude from the lower side as shown in FIG. 3, the workpiece will be supported by this and fall into the support frame 17 on the root side.Then, each hydraulic piston 8.9 will be opened. If it is operated to the side, the dividing plates 3, 3... and 5, 5.
... are in the open position to prepare for the next operation.

In this way, according to the present invention, the material pipe 7 processed into the upper split mold 4 is connected to the hydraulic piston 8 which removably holds the material pipe 7 between the split plates 3, 3, and so on. The raw material pipe 7 is switched between being held by the upper split mold 4 and being released from the holding state, and is taken out from the lower pressing plate 2 by opening the upper pressing plate 1 in the holding state. At the same time, it has the effect of being dropped from the upper pressing plate 1 in a state in which it is released from its holding, thereby making it extremely easy to take it out.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of an example of the present device, FIG. 2 is a diagram of its hydraulic system, and FIG. 3 is a cross-sectional view illustrating its extraction operation. 1.2... Pressing plate, 3, 3... Dividing plate, 4... Split mold, 5, 5... Dividing plate, 6
...Split mold, 7...Material pipe, 8,9
...Hydraulic piston, 10...Hydraulic power source.

Claims (1)

[Claims for Utility Model Registration] A plurality of divided plates 3 that are slidable at equal intervals in the lateral direction on the opposing inner surfaces of press plates 1 and 2 that can be opened and closed vertically.
, 3..., and the lower split mold 6, which is separated from a plurality of divided plates 5.5 and 5, which are slidable at equal intervals in the horizontal direction, are paired. The high-pressure liquid and its axial force are applied to the inside of the material pipe 7, which is supported between the split molds 4 and 6. In a bulge forming apparatus that performs bulge forming by applying a pressing force acting in the direction, the processed material pipe 7 is detachably attached to the upper split mold 4 between the split plates 3, 3, and so on. A workpiece take-out device in a bulge forming machine, characterized in that a hydraulic piston 8 for clamping is connected.