DE181630C - - Google Patents

Description

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IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- Λέ 181630- CLASS 49 e. GROUP

in ROSZLAU a. D. E.

Steam hammer with two cylinders lying on top of each other. Patented in the German Empire on December 2nd, 1905.

The present invention relates to a steam hammer, which is particularly suitable for closed-die forging is determined and held in its highest position after each stroke to be able to underlay a new piece of work.

The steam hammer has two on top of each other like the well-known composite steam hammers arranged cylinder and owns

ίο the innovation that at the upper end of the small, upper cylinder there is an adjustable Check valve and at the lower end there is an adjustable pressure relief valve.

Fig. Ι of the drawing shows the hammer in vertical section.

Fig. 2 illustrates the valves arranged on the upper cylinder in section in larger scale.

The piston a, which is connected to the bear and which is guided in the cylinder b, which is open at the bottom, is connected by a rod e to the piston c, which slides in the closed cylinder d lying above the cylinder b . There is a check valve / in the top cover of cylinder d. From the lowest point of the cylinder d , in addition to the inflow opening g, a channel h leads to a pressure relief valve i.

The valves are of a type known per se and are provided with means for limiting the stroke of the valve bodies n and 0. The valve i also contains an adjustable spring m, by means of which the load on the valve body ο can be regulated according to the required compression.

The check valve causes the air to be continuously expelled from the cylinder when the upper piston is lifted for the first time, so that when the piston descends above it, a vacuum is created and also, because no atmospheric air can flow in, the inside of the cylinder does not cool down. The valve is held down on its seat by an adjusting screw in such a way that only one passage opening corresponding to the permeability of the steam piston remains, which ensures reliable operation. The outflow channel for the upper cylinder is narrowed by a premature reversal of the piston valve k so that with rapid downward movement of the upper piston, the steam can not flow out quickly enough and will consequently compress under the same. The regulation of the compression is now achieved according to the present invention by an adjustable pressure relief valve attached to the lower end of the upper cylinder, which allows the steam to escape after establishing an arbitrarily adjustable compression pressure.

The inlet and outlet port is one and the same port for each cylinder. The control takes place in a known manner by a piston valve &, which is operated by a hand or Foot lever suddenly in its lowest

Claims (2)

Positioned and automatically reversed when the hammer goes down. The hammer works as follows: With the bear in the position shown in the drawing, the steam can flow through the annular constriction of the piston valve k and through the lower channel I into the cylinder b, which pushes the piston α downwards. The downward movement of the piston α also pulls the piston c connected to it downwards, as a result of which a vacuum is generated above the piston c. During the decline of the piston, the piston slide is automatically reversed, so that the outflow of the cylinder d is closed at half the stroke. The steam that is still under piston c undergoes strong compression as it descends, the height of which can be regulated by the adjustable pressure relief valve i. When the bear has reached its lowest position, the outflow channel of the cylinder b is released and the vapor above the piston α can pass through the piston slide into the exhaust. At the same time, the inflow for cylinder d is slightly open and the bear slowly returns to its maximum position. The sudden opening of the lower inflow gives the percussion piston a very high initial speed, which in connection with its great weight easily overcomes the compression under the piston c and the vacuum above it and is expressed in a very strong, sharp blow. Again, the compression under and through the vacuum over the piston c prevents the thin connecting rod from being compressed or bent and the bear is also immediately lifted off, even with slightly sticky workpieces. Godfather ν τ-Α ν Proverbs: 1. Steam hammer with two cylinders lying one above the other, of which the lower one is used to exert the impact effect, while the upper one causes the hammer to lift, characterized in that there is an adjustable check valve (s) at the upper end of the upper cylinder (d) , in order to generate and maintain a vacuum above the piston (c) when it descends. 2. Steam hammer according to claim 1, characterized in that at the lower end of the upper cylinder (d) an adjustable pressure relief valve (0) connected to the cylinder interior is attached to regulate the vapor compression. 1 sheet of drawings.