JPH0216823Y2 - - Google Patents

Description

[Detailed description of the invention] *Industrial application field This invention is a workpiece formed in a press that can be reliably and quickly discharged from the mold during the time when the mold is open. This relates to an automatic discharge device.

* Conventional technology When ejecting a workpiece from a mold in a press, conventionally, the workpiece that is in close contact with the upper mold during the molding process is forcibly removed from the upper mold by a knockout pad during the upper mold's raising process. A method was adopted in which the mold was separated and the released workpiece was then discharged from the mold part by gravity fall.

*Problems that the invention aims to solve However, in the above conventional technology, in order to enable the ejection of processed products by falling by gravity, the mold itself cannot be placed horizontally, and the mold cannot be placed horizontally.
It was necessary to install it at an angle of 30° to 60°. In order to be able to automatically transport the process performing machine before and after the press, the inclined press mold causes difficult problems in terms of machine design and process implementation.

In addition, in the conventional technology, although separation from the upper mold is forcibly performed by knockout, the ejection of the workpiece from the mold part is due to gravity, so the initial velocity becomes 0, and when the press stroke becomes faster, the workpiece is ejected. There is a risk that the upper mold will descend before the process is completed, causing double-strike trouble.

The present invention has been made in an attempt to solve the above problems.

*Means for solving the problem In order to solve the above problem, the present invention is designed to ensure that the workpiece is ejected from the horizontally arranged mold within the time allowed for high-speed processing. The present invention provides an automatic workpiece discharge device in a press. In other words, the processed product automatic discharge device of the present invention is
The upper mold and the lower mold are arranged horizontally, a discharge lever operating roller is rotatably mounted on the ram, and a discharge lever equipped with a cam corresponding to the roller is pivotally mounted on the press body. An ejection lever operating spring is tensioned between the ejection lever and the upper mold, and when the upper mold rises, the ejection lever is rotated by the force of the ejection lever activation spring, the working end of the ejection lever protrudes into the mold surface, and the upper mold is lifted. When the ram is lowered, the ejection lever operating roller rotates the ejection lever in the opposite direction and pushes the working end of the ejection lever out of the mold surface.A receiving plate actuation rod is attached to each side of the ram, and the lower mold Receiving plate shafts are disposed on both sides, and receiving plates having substantially L-shaped guides are fixed to each receiving plate shaft so as to face each other, and receiving plate operating levers corresponding to each receiving plate operating rod are fixed. Furthermore, a strike plate return spring is provided that constantly pulls each strike plate inward, and when the upper die is raised, both strike plates rotate inward due to the force of the strike plate return spring, creating a roughly L-shape between both strike plates. The shaped guides are located above both edges of the lower mold, and when the upper mold is lowered, each receiving plate operating rod pushes down each receiving plate operating lever so that each receiving plate opens outside the mold surface. It is.

*Example: The attached drawing shows the automatic workpiece discharge device according to the present invention attached to a general-purpose crank press, where 1 is the crankshaft disk of the press, and 2 is the crank pin attached to the crankshaft disk 1. It is eccentric from the center of the crankshaft by 1/2 of the mold stroke. 3 is a connecting rod, and 4 is a ram. Reference numerals 5 and 6 denote an upper die and a lower die, respectively, which are arranged horizontally, and numeral 7 denotes a knock-out pad for pushing out the workpiece that is in close contact with the upper die 5 and separating it from the upper die 5 after the molding process.

A discharge lever operating roller bracket 8 is fixed to the side of the ram 4, and a discharge lever operating roller 9 is rotatably attached to the tip of the bracket. On the other hand, a discharge lever 11 equipped with a cam 10 corresponding to the discharge lever operating roller 9 is pivotally attached to the press body via a discharge lever shaft 12, and a discharge lever operation spring 13 is stretched between the press body and the discharge lever 11. However, the cam 10 of the ejection lever 11 is constantly in contact with the ejection lever actuation roller 9 due to the force of the ejection lever actuation spring 13, and when the upper mold 5 rises, the ejection lever actuation roller 9 is moved to the valley part 10a of the cam 10 of the ejection lever 11. The ejection lever 11 is rotated by the force of the ejection lever operating spring 13, and the working end 14 of the ejection lever 11 protrudes into the mold surface, and when the upper mold 5 descends, the ejection lever operating roller 9 moves into the cam of the ejection lever 11. 10 and rotates the ejection lever 11 in the opposite direction against the force of the ejection lever operating spring 13, so that the working end 14 of the ejection lever 11 is pushed out of the mold surface.

On the other hand, a receiving plate operating rod holding bracket 15 is attached to each side of the ram 4, and each bracket 15 holds a receiving plate operating rod 17, which is covered with a buffer spring 16, so as to be able to rise and fall within a certain range. Receiving plate shafts 18 are arranged on both sides of the lower mold 6, and each receiving plate shaft 1
At 8, receiving plates 20 having substantially L-shaped guides 19 are fixed facing each other over the entire length of the mold side surface, and receiving plate operating levers 21 corresponding to the respective receiving plate actuating rods 17 are fixed. A receiving plate return spring 22 that always pulls inward is provided, and when the upper mold 5 rises, both receiving plates 20 move toward the receiving plate returning spring 2.
2, the substantially L-shaped guides 19 of both receiving plates 20 are positioned above both side edges of the lower mold 6, and when the upper mold 5 descends, the receiving plate actuating rod 17 operates the receiving plate. The lever 21 is pushed down and the receiving plate 20 is opened out of the mold surface against the force of the receiving plate return spring 22.

*Operation The blank 23 transported from the previous process to the mold position ends the molding process when the upper mold 5 reaches the bottom dead center (Figs. 3 and 4). Subsequently, the upper mold 5 rises, and when the receiving plate actuating rod 17 that opens the receiving plate 20 outside the mold surface rises and separates from the receiving plate operating lever 21, the receiving plate 20 is moved by the force of the receiving plate return spring 22. It rotates inward so that its substantially L-shaped guide 19 is positioned above both side edges of the lower mold 6 (FIG. 2). When the upper mold 5 further rises, the workpiece 24 is forcibly separated from the upper mold 5 by the knockout pad 7 and falls onto the receiving plate 20. At the same time, the ejection lever actuation roller 9 enters the trough 10b of the cam 10 of the ejection lever 11, and the force of the ejection lever actuation spring 13 causes the ejection lever
rotates, and the active end 14 of the ejection lever 11 projects into the mold surface and collides with the end surface of the workpiece 24 on the receiving plate 20. As a result, the workpiece 24 is quickly ejected out of the mold surface. Subsequently, a new blank 23 is fed under the receiving plate 20 (FIG. 2). The upper die 5 descends after reaching the top dead center, and the ejection lever actuating roller 9 moves the ejecting lever 11, which has ridden onto the peak 10b of the cam 10 of the ejecting lever 11, outward against the force of the ejecting lever actuating spring 13. and push the active end 14 of the ejection lever 11 out of the mold surface. next,
Each receiving plate operating rod 17 pushes down each receiving plate operating lever 21, and each receiving plate 20 is pushed down by the receiving plate return spring 22.
It resists the force of and opens out of the mold surface. Through these operations, the upper mold 5 continues to descend without the operating end 14 of the ejection lever 11 and the receiving plate 20 within the mold surface, and the lower mold 6
The blank is formed by joining with.

*Effects of the invention As explained above, according to the invention, since the press mold is arranged horizontally, it is extremely convenient, especially when the process execution machines before and after the press are of automatic conveyance type. Moreover, since the workpiece is ejected from the mold part by the ejection lever rather than falling from the mold part due to its gravity, the workpiece is quickly and reliably ejected from the mold part. Therefore, even in high-speed machining, there is no possibility that the upper die will descend before the ejection of the workpiece is completed, causing double striking.

[Brief explanation of the drawing]

The attached drawings show a state in which the automatic workpiece discharge device according to the present invention is attached to a general-purpose crank press. Figure 1 is a partially cutaway front view showing the crank at the top dead center and the gap between the upper and lower dies is at its maximum, Figure 2 is a side view of the same as above, and Figure 3 is the crank at the bottom dead center. A front view showing the mold in a closed state;
FIG. 4 is a side view of the same as above. 1: Crankshaft disk, 2: Crank pin,
3: connecting rod, 4: ram, 5: upper mold,
6: Lower die, 7: Knockout pad, 8: Ejection lever operating roller bracket, 9: Ejection lever operating roller, 10: Cam, 10a: Valley, 10
b: Mountain part, 11: Ejection lever, 12: Ejection lever shaft, 13: Ejection lever operating spring, 14: Working end, 15: Receiving plate operating rod holding bracket, 1
6: Buffer spring, 17: Receiving plate operating rod, 18: Receiving plate shaft, 19: Approximately L-shaped guide, 20: Receiving plate, 2
1: Receiver plate actuation lever, 22: Receiver plate return spring, 23: Blank, 24: Processed product.

Claims (1)

[Scope of Claim for Utility Model Registration] An upper mold 5 and a lower mold 6 are arranged horizontally, and a discharge lever operating roller 9 is rotatably mounted on the ram 4.
A discharge lever 11 equipped with a cam 10 corresponding to the roller is pivotally attached to the press body, and a discharge lever actuation spring 13 is tensioned between the press body and the discharge lever, so that the discharge lever is activated when the upper die is raised. The ejection lever is rotated by the force of the spring, and the working end 14 of the ejection lever projects into the mold surface.
When the upper mold is lowered, the ejection lever operating roller rotates the ejection lever in the opposite direction and pushes the working end of the ejection lever out of the mold surface, and a receiving plate operating rod 1 is provided on each side of the ram 4.
7 is attached, and receiving plate shafts 18 are arranged on both sides of the lower mold, and receiving plates 20 having approximately L-shaped guides 19 are fixed to each receiving plate shaft so as to face each other. Fix the corresponding receiving plate operating lever 21,
Furthermore, a strike plate return spring 22 is provided that always pulls each strike plate inward, so that when the upper die is raised, both strike plates are rotated inward by the force of the strike plate return spring, so that both strike plates are approximately L. A character-shaped guide is located above both edges of the lower mold, and when the upper mold is lowered, each receiving plate operating rod pushes down each receiving plate operating lever so that each receiving plate opens outside the mold surface. , automatic discharge device for processed products in presses.