JPS6213717Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a knockout device for a forging press.

Conventional knock-out devices use a cam and lever to drive the initial push-up, that is, the work of separating the forged product from the die, which makes machining the cam troublesome and requires a device to protect this drive machine from overload. is necessary.

Furthermore, since an air cylinder is used to lift the forged product separated from the mold, if the lift amount of the air cylinder method is larger than that of the mechanical method, the forging will fly up, making it difficult to automate the forging press. There is.

This idea was devised in view of the above-mentioned circumstances, and its purpose is to provide a knock-out system that has a simple structure, can absorb overload, and can smoothly remove and lift forged products from the mold. The goal is to provide equipment.

This invention will be explained below with reference to illustrated embodiments.

The knockout device 1 includes a first drive section 2 and a second drive section 2.
It consists of a drive section 3.

The first drive unit 2 has a knockout pin 6 at its upper end that can slide up and down through a through hole 5 provided in the base 4.
A contact portion 8 that is in contact with a push-up portion 7, which will be described later, is located at the lower end.
piston rods 9 each provided with a
Cylinder 1 that moves this piston rod 9 up and down
It consists of 0.

The cylinder 10 is formed on a base, and through holes 11 and 12 are provided at the upper and lower ends thereof, respectively, to penetrate into the cylinder from outside the base 4. An air source 13 is provided in the through hole 11 at the upper end.
Compressed air is sent from the solenoid valve 14 through the solenoid valve 14.
Pressure oil is sent from the hydroconverter 15 via a speed controller 16 formed by a variable flow rate regulating valve with a check valve. Compressed air is sent to the air-hydro converter 15 from the aforementioned air source 13 via the solenoid valve 14, and this compressed air is converted into pressure oil.

The second drive section 3 includes a cylinder section 19 having a booster mechanism 17 and a piston rod 18 whose tip end is attached to the booster mechanism 17 and operates the booster mechanism 17.
It is made up of.

The boost mechanism 17 includes a push-up part 7 that can slide up and down through a through hole 21 provided in a base attachment part 20a of the bracket 20, and a bottom part 20b of the bracket 20.
The fixing part 22 provided in the fixing part 22
Both links 23, 23 connecting the and push-up part 7
The tip of the piston rod 18 is pinned to the junction of the two links 23, 23.

The cylinder part 19 is swingably pinned to the bottom of the bracket 20, and compressed air is sent to the end on the side of the booster mechanism 17 similarly to the through hole 11 of the first drive part 2, and the end on the side of the booster mechanism 17 receives compressed air. Pressure oil is also sent to the end portions similarly to the through holes 12.

When using the knock-out device 1 having such a configuration, first, after the forging work by the press is completed, when the solenoid valve 14 is switched in response to a command from the press, compressed air from the air source 13 is pumped into the upper part of the air-hydro converter 15. flows into.

The compressed air that has flowed into the air-hydro converter 15 is converted into pressure oil, and the compressed air flows through the through hole 12 of the cylinder 10 of the first drive section 2 and the cylinder section 1 of the second drive section 3.
9 at the end opposite to the booster mechanism 17 side. At this time, the speed controllers 16, 16
The cylinder section 19 of the second drive section 3 is controlled to be driven first.

And the piston rod 18 of the cylinder part 19
is moved forward toward the booster mechanism 17 by pressure oil. This forward motion is converted and expanded into a vertical motion by a booster mechanism and transmitted to the push-up portion 7. Due to this increased upward force of the push-up part 7, the piston rod 8 of the first drive part 2 whose contact part 8 is in contact with the push-up part 7 moves upward, and the knockout pin 6 provided at the upper end moves upward.
protrudes outside the base 4 to separate the forged product (not shown) from the mold (not shown).

Next, when the forged product is separated from the mold and large force is no longer required, the piston rod 8 of the first drive section 2 is further moved upward by the pressure oil sent from the through hole 12 of the cylinder 10 to lift the forged product. . In addition,
Since the upward movement and forward speed of each cylinder 10, 19 can be controlled by the speed controllers 16, 16, the lifting speed of the forged product can also be freely controlled.

Next, when the knockout operation is completed as described above, the solenoid valve 14 is switched to supply air to the through hole 11 of the cylinder 10 of the first drive section 2 and the end of the cylinder section 19 on the side of the booster mechanism 17. At the same time as pressing down, pull back the piston rod 18 to lower the knockout pin 6.

FIG. 2 shows a modification of the booster mechanism 17 of the second drive section 3. As shown in FIG.

The boosting mechanism 17 includes a wedge-shaped sliding piece 24 provided at the tip of the piston rod 18 of the cylinder portion 19 formed on the base 4, and is provided on the base 4 so as to be movable up and down by this sliding piece 24. Push-up part 7 shaped so that its end surface can come into contact with the sliding piece 24
The sliding piece 24 is provided so as to be slidable in a sliding groove 25 of a bracket 20 attached to the base 4.

When the sliding piece 24 slides in the sliding groove 25 as the piston rod 18 moves forward, the sliding piece 24
The push-up part 7 moves upward along the slope of the upper surface. The forward force of the piston rod 18 at this time is magnified and transmitted by the slope of the upper surface of the sliding piece 24.

Note that the other movements are the same as the knockout device 1.

In this way, the boosting mechanism 17 may include several other types of mechanisms.

This invention has the above configuration and has the following effects.

Since the drive unit is divided into two drive units, the first drive unit and the second drive unit, and each drive unit is driven by a cylinder, the structure is simple and overload can be absorbed.

The initial push-up or release from the mold is the second
The forged product can be easily and reliably released because the force exerted by the cylinder is magnified by the force boosting mechanism of the drive section. Furthermore, since there is a boosting mechanism, the large force reaction when releasing the forged product does not directly affect the cylinder.

Only the work of separating the forged product from the die and lifting the forged product is performed using pressure oil converted by an air-hydro converter. Therefore, lifting work can be carried out smoothly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a knockout device of this invention, and FIG. 2 is a sectional view showing a knockout device using a modified example of the boosting mechanism. 1... Knockout device, 2... First drive section,
3...Second driving part, 4...Base, 5...Through hole,
6... Knockout pin, 7... Push-up part, 8...
Contact part, 9...Piston rod, 10...Cylinder, 11...Through hole, 12...Through hole, 13...Air source, 14...Solenoid valve, 15...Air/hydro converter, 16...Speed controller, 17
...Boosting mechanism, 18...Piston rod, 19...
...Cylinder part, 20...Bracket, 20a...
Base mounting part, 21...through hole, 22...fixing part,
23...link, 24...sliding piece, 25...sliding groove.

Claims (1)

[Scope of utility model registration request] a first drive section having a piston rod having a knockout pin at its upper end and a contact section at its lower end; and a cylinder for moving the piston rod up and down; The piston rod has a boosting mechanism in which a push-up part that can be operated above the out pin is provided at the upper end, a piston rod whose tip is attached to the boosting mechanism to operate the boosting mechanism, and a cylinder that moves the piston rod forward and backward. an air source that supplies compressed air to each cylinder of the first and second drive parts; and an air source that supplies compressed air to each cylinder only when the knockout pin and push-up part move upward. A knock-out device comprising an air-hydro converter for converting pressure oil into pressure oil, and being controlled so that the initial upward movement of the knock-out pin is performed by a second drive section and the subsequent upward movement is performed by the first drive section. .