JPH0710824Y2 - Material transfer device for press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a material transfer device for a press, particularly bending, crushing,
In a press machine having a plurality of forming parts such as stretching, the material to be formed is installed in the press machine from the former forming part in the machine.
The present invention relates to a material transfer device in a press machine that inverts 90 ° and conveys it to the next-stage forming section.

(Prior Art) For example, a deformed member such as a swinging arm bent in a dogleg shape is manufactured as a product through a plurality of forming processes such as a bending process, a crushing process, and an arm base punching process. In the case of a rectangular arm, the bending process of the previous process and the crushing process of the subsequent process,
Since the direction of the material to be molded is different from that in the roughing process, a bending press is usually installed separately, the material bent by this bending press is inverted 90 ° by a manipulator etc., conveyed to the forging press, crushed and roughed. , Processing of each molding process such as finishing, punching, and punching. In addition, a reversible claw is provided on the transfer feeder that moves the material to a plurality of molding processes, and the material after bending and molding is grasped by the claw at the same time.
A method of reversing 90 ° is also proposed.

(Problems to be solved by the invention) In the processing of deformed shaped articles such as the above-mentioned rectangular rocking arm, the method of placing the bending press separately and reversing it by 90 ° with the manipulator requires an installation space for the bending press. In addition, it takes a long time to carry it into the forging press after reversal, and the temperature drop of the material deteriorates the subsequent formability. The method of reversing and transferring the transfer feeder with reversing claws requires a claw with a built-in clamping function and positioning dowel projection (rotation center alignment) by bending molding, and the structure is complicated and the entire space and formability are also considered. There is a problem and it has not been realized.

In the present invention, the bending forming is performed in the press machine, and the product is automatically turned by 90 ° and conveyed to the next process, which can save space, reduce cost, improve efficiency and improve product quality. It is to provide a material transfer device.

(Means for Solving the Problem) According to the present invention, in a press machine having a plurality of forming parts arranged in the material conveying direction, there is formed an uneven shape which is slidably engaged with the upper and lower molds of the former forming part in the press machine. A guide part is formed to support the lower mold so that it can be inverted by approximately 90 °, a knockout mechanism is provided at the bottom of the lower mold, and a material extruding mechanism that horizontally moves into and out of the lower mold is provided. There is obtained a material transfer device for a press machine in which the material extruding mechanism pushes out the knockout mechanism to feed the material to be molded to the next-stage molding section when the die rolls over to the horizontal position.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall side view of a multi-stage forging press equipped with a material transfer device according to an embodiment of the present invention. A plurality of lower molds and upper molds are arranged side by side in the conveying direction (direction of arrow A) of the material to be molded, a material charging device is installed on the inlet side of the press machine, and a discharge device is installed on the outlet side. The lower die 7 and the upper die 8 of the bending forming portion 1 which is the frontmost forming portion are arranged in the material charging portion, and subsequently, the crushing forming portion 2, the rough-forming portion 3, the finish-forming portion 4, the hollow punch or the outer portion. The punching / molding section 5 for punching is composed of upper and lower dies which are adapted to each. A material extruding mechanism section 9 is provided on the entry side of the bending section 1.

2 is an enlarged side sectional view of the material transfer device in the embodiment of FIG. 1, and FIG. 3 is a front sectional view taken along line III-III of FIG. FIG. 4 is a plan view of the lower die of the bending portion in the embodiment of FIGS. 2 and 3. Referring to these figures, the upper mold 8 of the bending part 1 has a convex V-shaped mold contour part 13 in a plane perpendicular to the material conveying direction so as to match a desired bending shape of the material 10 to be molded. 4 formed on the lower side of the upper mold 8
Four upper die guide portions 14 protruding downward are formed at the corners. The lower end of the upper die guide portion 14 hangs L longer than the lowermost end of the convex V-shaped contour portion 13 of the upper die 8.

The lower die 7 of the bending portion has a groove-shaped die contour portion 12 surrounded by the inner wall thereof, and a through hole 7a is formed in the bottom portion thereof. The inner width D of the groove-shaped contour portion 12 is a width that regulates the thickness of the material 10 to be molded, and both inner side surfaces in the direction perpendicular to this are the V-shaped outer sides of the material 10 bent in a V shape. It is an inclined surface that regulates the part. The lower die 7 is housed in a lower die holder 19 rotatable about a horizontal axis perpendicular to the material conveying direction.

The lower die holder 19 is pivotally supported by the bearing portion 22 on the device fixing side at the journal portions 19a, 19b at both ends, and the shaft end of the journal portion 19a on one side is connected to the piston rod of the reversing cylinder 27 via the reversing lever 26. ing. The outer portions of the four corners of the lower die holder 19 are notched in a rectangular shape, and this portion serves as the lower die guide portion 25. By lowering the upper die 8, the upper die guide portion 14 is slidably fitted to the lower die guide portion 25 of the lower die holder 19,
As a result, the position of the lower die holder 19 and therefore the lower die 7 during bending is fixed.

Into the through hole 7a of the lower die 7, a knockout member 16 having a curved shape so as to regulate the outer bottom shape of the V-shaped bent portion of the molding material 10 is inserted. A knockout shaft 17 extending from the lower end of the knockout member 16 penetrates the lower die holder 19 and projects to the outside of the holder 19. A compression spring 18 is mounted between the shaft end flange portion of the knockout shaft 17 and the lower die holder 19, whereby the knockout member 16 is always in the lower die 7.
Is pressed to the bottom side of the lower mold 7
The concave groove-shaped contour portions 12 are smoothly connected to each other and define the concave space of the lower mold 7 as a whole. A material guide groove 23 for holding the straight material 10 'before bending is formed at the position of the groove-shaped contour portion 12 on the upper surface of the lower mold 7.

As shown in FIG. 2, an extruding cylinder 11 of the material extruding mechanism portion 9 is provided on the entrance side of the bending portion 1. A pusher 20 is fixed to the tip of the piston rod of the pushing cylinder 11.

After the straight rod-shaped material 10 'is loaded by the material loading device (not shown) into the material guide groove 23 in the upper portion of the lower die 7 of the bending part 1, when the upper die 8 is lowered, the concave V-shaped contour of the upper die 8 is formed. The upper die guide portion 14 is connected to the lower die guide portion before the portion 13 contacts the material 10 '.
The material 10 'is bent into a V shape while being fitted with 25 and the lower die 7 being prevented from rotating. The load at the time of bending is carried by the shaft supporting portion 22 on the device fixing side via the lower die holder 19. When the bending process is completed and the upper die 8 reaches the upper limit position indicated by the solid line in FIGS. 2 and 3, the lower die holder 19 becomes rotatable, and the reversing cylinder 27 causes the lower die holder 19 via the reversing lever 26. Is 90
° Reversed to the crushed molding part side (position in phantom line in Fig. 2). Next, the push-out cylinder 11 is actuated, and the pusher 20 pushes the knockout shaft 17 against the compression spring 18 of the knockout mechanism portion to push the knockout member 16 horizontally from the lower die 7, thereby ejecting the V-shaped material 10. Material to be taken out from the lower mold 7 and adjacent to the lower mold 7 on the crush-molded lower mold (crushed lower mold) 21
10 is moved, and further brought into contact with the positioning stopper portion 29 on the upper surface of the crushing lower die 21 to be positioned at the crushing molding position. Sixth
The figure shows the state at this time. When the material 10 is completely conveyed, the pusher 20 is retracted to release the pressing force of the knockout shaft 17, and the knockout member 16 is returned to the lower die bottom position by the spring force of the compression spring 18. Next, the lower mold 7 is reversed by 90 ° in the reverse direction by the reversing cylinder 27 and returned to the original vertical position.

(Effects of the Invention) As described above, according to the present invention, the bending forming part is incorporated into the forging press together with the other forming parts, and the bending forming is performed by the inversion operation of the lower bending die and the extrusion mechanism using the knockout member. Since the material is inverted and sent to the next molding section, there is no need to install a bending press separately as in the past, and the material can be conveyed quickly, reducing the temperature drop and improving moldability. To do. Since the material restraint part of the lower bending mold has a concave groove shape, there is no deviation of the material during bending, and since the upper and lower molds are fitted with the uneven guide part, rotation of the lower mold during molding is prevented and stable A molding operation is obtained. Materials can be reliably conveyed inside the press machine, which improves the efficiency of press work, reduces costs, and improves product quality.

[Brief description of drawings]

1 is a schematic overall side view of a forging press equipped with a material transfer device according to an embodiment of the present invention, FIG. 2 is an enlarged side sectional view of a material transfer device according to an embodiment of the present invention, and FIG. Two
Fig. 4 is a front sectional view taken along the line III-III in Fig. 4, Fig. 4 is a plan view of a bending lower mold, Fig. 5 is a schematic diagram of a reversing mechanism by a reversing cylinder and a reversing lever, and Fig. 6 is crushed and molded material after reversing. It is a partially cutaway plan view of the state of being positioned at a position. 1 ... Bending forming part, 2 ... Crushing forming part, 7 ... Bending lower mold, 8 ...
Bending upper die, 9 ... Material extrusion mechanism section, 10 ... Material, 11 ... Extrusion cylinder, 14 ... Upper die guide section, 16 ... Knockout member, 19
… Lower mold holder, 20… Pusher, 22… Bearing part, 25… Lower mold guide part, 27… Inversion cylinder.

Claims (1)

[Scope of utility model registration request] 1. A pressing machine having a plurality of forming parts arranged in the material conveying direction, wherein a guide part having concave and convex portions which are slidably engaged with upper and lower dies of a former forming part in the pressing machine is formed, It is supported so that it can be inverted by approximately 90 °, a knockout mechanism is provided at the bottom of the lower mold, and a material extrusion mechanism that horizontally moves in and out is provided on the side of the lower mold, and when the lower mold rolls horizontally, A material transfer device for a press machine, characterized in that a material extruding mechanism pushes out the knockout mechanism to feed a material to be molded to a next-stage molding section.