DE1915768U - AUTOMATICALLY WORKING PUNCH. - Google Patents

Description

ΪΑ. U G 215 * 22.3.

PafenfanwaW
Dipl.-Phys. Rudolf Peerbooms

56 Wuppertal - Barmen
Sdiuchardstr. 20 - Tel. 556147

GM

Gebr also has to register

Applicant: lirma Thölen & Co., Maschinenfabrik
Wuppertal-Barmen, Germanenstr. 7 ^ -78

Automatically working punch

The price increase concerns an automatically working punch with a main drive shaft mounted in the machine frame for the up and down movement of the punching tool, to which a crank drive for the cyclical drive of material feed rollers is connected, with a drive motor and a clutch-brake device for the main drive shaft

In the known such punching, the main drive shaft is during normal operation with a Flywheel coupled in order to achieve the most uniform possible regardless of the energy used in the punching work To achieve gear of the punching tool. To the

Braking the machine is the main drive shaft from Flywheel is first disconnected and only then is the actual braking process initiated. For one Normal shutdown of the punch such a braking device is sufficient, but it proves to be being too slow to react if the punching tool is dependent on a Pehlführung of the strip of material should be stopped. The guide of the strip of material is generally about guide pins, the intervene in special perforations of the strip, monitored such that the guide pins when not working properly Engaging in the perforations of the strip of material actuate an electrical contact that over a corresponding switching device a switchover of the clutch / brake device from the clutch state triggers on braking state.

Such a so-called Höt-Aus circuit extends however, in the known punching over several revolutions b: zw. Strokes of the punching tool so that this even after the guide pins have already detected an incorrectness, several © makes incorrect punchings. There is also a very large part of the braking force applied during a stroke of the punching tool K from energy consumption during a punching process

stirs, the punching tool "in the known devices very often comes in the vicinity of the bottom dead center to a standstill, where it has worked itself into the strip of material, in this case "prepares" It is often very difficult to lift the punching tool again and to realign the strip of material.

The innovation is based on the task of a punch to create with a shorter hot braking time in order to avoid defective joints, material losses and the To avoid punching tool in the strip of material.

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The innovation achieves this primarily in that another brake is provided on the main drive shaft for an emergency stop The brake cylinder is rigidly attached to the machine frame via a brake carrier and is connected to the fluid displacement chamber of the brake pressure generating device via a pressure fluid line.

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The effective brake, "for example can be a conventional truck brake, "has such a capacity that it Main drive shaft even when coupled to the flywheel on a path of preferably less than one Able to brake rotation. At a lower working frequency of the punch and accordingly proportionately less, more stored in the moving parts kinetic energy is achieved by the innovation such a rapid deceleration that the punching tool after Signal triggering by the 3 guide pins before reaching the bottom dead center comes to a standstill. In the case of higher working frequencies, it is advisable to

to allow passage of the punching tool through the katerial strip and only to bring the punching tool to a standstill on the subsequent circulation path. This can for example be made by special setting of the air pressure of the brake pressure generating device.

According to further features of the innovation, the brake pressure generating device in a manner known per se on an air cylinder that can be connected to a compressed air line via an electromagnetic valve, the with its piston rod into the liquid displacement chamber protrudes. The electromagnetic valve that

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Air cylinder and the liquid displacement space are advantageously next to each other within of the upper machine frame;] oches, so that these parts do not take up any additional space.

The subject of the innovation is in the following with reference to an embodiment shown in the drawing for example explained in the show:

1 shows a simplified front view of a punch Representation and

. 2 shows a section through the part of FIG Punch.

In the E ¹ Ig. 1 and 2, the machine frame is provided with item number 1, in which the main drive shaft 2 for the movable punching tool 3 is mounted. The main drive shaft is driven by a motor 4, with a flywheel and a clutch braking device for the main drive shaft 2 being arranged in the housing part 5 in a manner known per se

the material strip with each revolution of the main drive swe he do push forward a certain piece. With 7 an additional brake is numbered, whose Brake drum 8 is attached to the main drive shaft 2 and its brake carrier 9 is attached to the machine frame. the Brake 7 is designed as a shoe brake, the two brake shoes (not shown) being known per se Weis-e at one point about a brake cylinder 10 and are connected to one another at a diametrically opposite point via an adjacent bearing 11.

In the upper yoke 1 a of the machine frame 1 is a brake pressure generating device designated as a whole by 12 arranged, which consists essentially of an air cylinder 13 and a fluid displacement chamber 14 consists. The air cylinder 13 is via an electromagnetic actuated valve 15 can be connected to a compressed air line 16. Inside the air cylinder 13 is a Piston 17 is arranged, the piston rod of which protrudes into the displacement chamber 14 and there when pressure is applied of the air cylinder with, for example, four atmospheric pressure due to the different pressure area ratios causes a significantly higher pressure in the brake fluid. For example, the braking

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printer generation device be designed such that a brake fluid pressure of 85 atmospheres is achieved. The brake pressure is introduced into the brake cylinder 10 via the connecting line 18, which is known in FIG Way a strong pressure of the brake shoes on the Brake drum causes.

With the new type of punch, hot braking is achieved by opening the electromagnetic table tile causes the circuit of which is closed by a contact operated by a monitoring device, after which the required brake pressure builds up within a few milliseconds, and the entire Punch comes to a standstill after a short braking distance

Claims (1)

RA. 1 ^ 6215-22.3.65 «• Μ Ο" " 56 Wu ^{RudölfPöerfeö} ömS - Ul. SS 6t 47 GM ~ 153 Protection claims 1 · Automatically working punch with a main drive shaft for the Up and down movement of the punching tool, to which a crank drive for the cyclical drive of material s ch-abwal ζ en is connected, with a drive motor and a clutch-Biems device for the Main drive swe He, characterized in that a further brake (7) for the hot-off-I? All on the main drive shaft (2) is provided, which is designed as a hydraulically actuated shoe brake, whose brake pressure generating device (12) is arranged in the upper yoke (1a) of the machine frame (1). 2. Punch according to claim 1, characterized in that g e k e η η that the brake cylinder (10) acting on the brake shoes via a brake carrier (9) 9 - is rigidly attached to the machine frame (1) "and over a pressure fluid line (18) with the fluid displacement chamber (14) of the brake pressure generating device (12) is in connection. 3. Punch according to claims 1 and 2, characterized in that the brake pressure generating device (12) in a manner known per se via an electromagnetic valve (15) to a Compressed air line (16) connectable air cylinder (113) the has, with its piston rod (17) in the liquid sverdrängerraum (14) protrudes, and that electromagnetic valve, air cylinder and liquid displacement chamber side by side within the upper machine frame;] ο before s (1a) are arranged.