JP2532484Y2 - Can release device in press machine for can making - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a can removing device for removing a processed can from a punch by air injected from the tip of the punch in a can forming press machine. is there.

`` Conventional technology '' Conventionally, the body of an aluminum can has a disk-shaped member obtained by punching an aluminum alloy base plate and pressing it to produce a cup-shaped intermediate processed product with a shallow bottom. The intermediate product is subjected to deep drawing and ironing to finish it in a predetermined shape.

FIG. 5 shows a processing state when deep drawing and ironing are performed on the cup-shaped intermediate processed product having a shallow bottom.

Intermediate processed product W supplied from a predetermined supply path (not shown)
Is fitted to the front end of the reciprocating punch 1 in the forward movement thereof, and passes through the drawing die 2 in the fitted state. At this time, deep drawing is performed to form an elongated body. Next, the intermediate workpiece W is pressed against the fixed end former 3 together with the punch 1 to form a predetermined concave shape at the bottom.

Thereafter, air is supplied from an air injection nozzle 4 formed through the center of the punch 1, and the can body formed thereby is separated from the punch 1.

Incidentally, it is preferable that the detachment of the can body is performed immediately after the ironing of the bottom is performed. Therefore, the timing of injecting the air is considered before the ironing of the bottom portion (end), taking into account that there is a time delay from the supply of the air until a predetermined release pressure is generated between the can body and the punch 1. (Before being pressed against the former 3). In addition, since the moving speed of the punch 1 changes according to the processing speed of the press machine for can making, it is necessary to consider the moving speed of the punch 1 when determining the air injection timing.

For this reason, conventionally, the air supply timing of the air injection nozzle 4 is set in advance in two stages, that is, early and late, and the operator has taken measures by selecting a suitable one for the moving speed of the punch.

"Problem to be solved by the invention" As described above, in the conventional can removing device, there is no choice but to select one of the two stages of early and late air injection timing. Arises
If the moving speed of the punch changes beyond a certain range as the line speed (the forming speed of the can) changes, the desired air injection timing cannot be obtained, and the press machine for can making is temporarily stopped. I had to stop.

If the press machine for can making is once stopped, when it is operated again, some must be trial-shot, which causes a problem that manufacturing efficiency is reduced.

The present invention has been made in order to solve the above-mentioned problem. The purpose of the present invention is to allow a desired can removal operation without stopping the can-making press machine even when the line speed (can forming speed) changes greatly. An object of the present invention is to provide a can separating device in a can forming press machine that can be performed.

"Means for Solving the Problems" In order to achieve the object, the present invention performs deep drawing and ironing on a shallow cup-shaped intermediate product to integrally form the body and bottom of the can. In a can making press machine, an air injection nozzle formed at the tip of a punch that presses the intermediate processed product, and a detecting unit that detects a rotation speed of a flywheel that reciprocates the punch via a clutch, A control means for continuously adjusting the supply timing of the air injected from the injection nozzle and the operation timing of the clutch based on the output signal of the detection means is provided.

"Action" The injection timing of the air injected from the tip of the punch,
It can be adjusted steplessly in accordance with the rotation speed of the flywheel, and the rotation speed of the flywheel has a fixed relationship with the movement speed of the punch. The injection timing can be adjusted.

Therefore, even when the line speed significantly changes due to a line trouble or the like, the operation of removing the can from the punch can be smoothly performed.

Further, the detecting means can adjust the operation timing of the clutch steplessly by detecting the rotational speed of the flywheel which has a fixed relationship with the moving speed of the punch. In this case, since the detecting means detects the rotation of the flywheel, the operation timing of the clutch can be adjusted more accurately than in the case where the reciprocating operation of the punch is detected instead. This is because, when adjusting the operation timing of the clutch, the rotation of the flywheel before the power is transmitted to the clutch is detected rather than the operation of the punch, which is the stage after the power is transmitted to the clutch. This is because the detection is easier to perform more accurate adjustment.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. The same components as those described in the conventional example are denoted by the same reference numerals.

FIG. 1 shows a press machine for can making, in which reference numeral 10 is a flywheel rotated by a motor 11, and 12 is a ram shaft for supporting the punch 1 movably in the axial direction. As described in the conventional example, the punch 1 is fitted with a cup-shaped intermediate product W having a shallow bottom at the tip thereof, the drawing die 2 is inserted therethrough, and the punch 1 is pressed against the bottom former 3. A predetermined drawing process and an ironing process are performed. The punch 1 is provided with a clutch (not shown) between the punch 1 and the flywheel 10, and is reciprocated when the clutch is turned on. The punch 1 is provided with a brake mechanism, and the brake mechanism operates when the clutch is switched to the off state, whereby the punch 1 is stopped at a predetermined standby position.

The rotation of the flywheel 10 is detected by the sensor 15. The signal output from the sensor 15 is sent to the control device 16. In the control device 16, the signal sent from the sensor 15 is temporarily converted into angle information by a rotary encoder, and based on the converted value, the air injection timing corresponding to the moving speed of the punch 1 is calculated. The calculation formula is as follows.

t = A ^x + B t: Air injection timing (specifically, the time from air injection to the bottom former 3; see FIG. 1) A: Constant x: Number of can presses per unit time (rotary (Calculated based on the output signal from the encoder) B: Time delay of air introduction path The relationship between the number of can presses per unit time expressed by the above equation and the air injection timing is shown in FIG. As is clear from this figure, if the number of can presses increases, the air injection timing needs to be long, and if the number of can presses decreases, the air injection timing needs to be short.

The reason why the air injection timing changes in accordance with the number of presses of the can is that the moving speed of the punch 1, which is an important element for determining the timing of air injection, changes with the change in the number of presses of the can. .

Then, a valve drive signal is output from the control device 16 so as to satisfy the condition of the calculated air injection timing, and based on the output signal, there is no air valve interposed in the air introduction passage leading to the air injection nozzle 4. It is opened and closed step by step.

In FIG. 2, reference numerals A and B represent conventional air injection timing regions. As described above, with the conventional can removing device, it is impossible to take the air injection timings other than those areas A and B.

C in FIG. 3 is a timing signal output from the rotary encoder, from which the number of presses of the can is calculated, and the air injection timing t is obtained as shown in D in the figure based on the value.

The air injection timing may be calculated one by one based on each signal from the rotary encoder, or the air injection timing is determined for each of several signals or the sum of several signals to determine the average. May be.

However, according to the can removing device in the can making press machine having the above-described configuration, for example, there is some trouble on the line, and the supply speed of the can is significantly reduced, and accordingly, the rotation of the flywheel 10 is slowed down. Even in such a case, the air injection timing can be adjusted steplessly via the control device 16 accordingly, and there is no need to stop the line unless it is extreme.

For this reason, the press line is temporarily stopped as before,
The problem of performing a test strike when re-actuating and sacrificing some of them is eliminated.

The control based on the signal of the rotary encoder connected to the sensor 15 for detecting the rotation speed of the flywheel 10 is not only the air injection timing but also the punch 1 and the fly 1 as shown in FIG. The operation timing of the clutch interposed between the wheel 10 and the operation timing F of the brake mechanism attached to the punch 1 and the feed mechanism of the can used in the cutting process of the can head after forming the can body ( The operation timing of the so-called trimmer can also be controlled.

According to the present invention, as described above, the injection timing of the air injected from the tip of the punch can be continuously adjusted according to the rotation speed of the flywheel, and the rotation speed of the flywheel can be adjusted. Has a constant relationship with the moving speed of the punch, so that the air injection timing can be adjusted steplessly in accordance with the moving speed of the punch. Therefore, even when the line speed significantly changes due to a line trouble or the like, the operation of removing the can from the punch can be performed smoothly.

As a result, the press line is temporarily stopped as in the past,
There is no inconvenience that a test strike is performed at the time of re-actuation and some of them are sacrificed.

Further, the detecting means can adjust the operation timing of the clutch steplessly by detecting the rotation speed of the flywheel which has a fixed relationship with the transfer speed of the punch. In this case, since the detecting means detects the rotation of the flywheel, the operation timing of the clutch can be adjusted more accurately than in the case where the reciprocating operation of the punch is detected instead. This is because, when adjusting the operation timing of the clutch, the rotation of the flywheel before the power is transmitted to the clutch is detected rather than the operation of the punch, which is the stage after the power is transmitted to the clutch. This is because the detection is easier to perform more accurate adjustment.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a view for explaining air injection timing, FIG. 3 is an explanatory view showing a relationship between an output signal of a rotary encoder and a valve drive signal. 4 is an explanatory diagram showing the relationship between the output signal of the rotary encoder, the clutch-off signal, and the operation signal of the brake mechanism associated with the punch. FIG. 5 shows the state of the can body formed by the conventional can-making press machine. FIG. 1 ... Punch 4 ... Air injection nozzle 15 ... Sensor (detection means) 16 ... Control device (control means) W ... Intermediate processed product

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Mitsuo Yokoyama 1-1, Shintsutsunaka-dori, Yuki-shi, Ibaraki Pref.

Claims (1)

(57) [Scope of request for utility model registration] 1. A can-forming press working machine for forming a can body and bottom integrally by subjecting a cup-shaped intermediate work product (W) having a shallow bottom to deep drawing and ironing, wherein the intermediate processing is performed. An air injection nozzle (4) formed at the tip of a punch (1) for pressing an article (W), and a detection for detecting a rotation speed of a flywheel (10) for reciprocating the punch (1) via a clutch. Means (15)
And control means (16) for continuously adjusting the supply timing of the air injected from the injection nozzle (4) and the operation timing of the clutch based on the output signal of the detection means (15). Can release equipment in can press machines.