CS253448B1 - Plasma cutter for cutting a bar of rusty materials - Google Patents

Abstract

A plasma cutter for cutting difficult-to-cut materials, such as high-alloy steels, copper, brass and the like, consists of a cutter body (2), in which an electrode (8) is held by a collet (7), water inlets (4), water outlet (5) and gas inlet (6) are soldered to the torch body. A current inlet (14) for the auxiliary arc is pushed onto the cutter body (2).

Description

233448

BACKGROUND OF THE INVENTION The present invention relates to a plasma cutter for cutting hard-to-cut materials, particularly high alloyed steels, media, brass and the like.

The design of the prior art plasma cutters is relatively expensive and complex. The cutter body is provided with a plurality of shells for supplying and supplying water and for supplying gases which are brazed together with the inlet pipes. The soldered body of the incisor is coated with an insulating material. A cutter nozzle composed of several components which are laboriously made in a press jig and are processed together are soldered together. The nozzle is screwed into the nozzle and is not directly cooled by water. The insulating intermediate piece is composed of two pieces relatively demanding in manufacturing technology. Another construction of a plasma cutter has a cutter body of two components, between which the insulating intermediate piece is screwed together, which is a difficult assembly, but also for sealing, since it requires atypical seals. The cooling water and the gas are guided by ducts which are milled into the body of the incisor to which the outer shell is soldered. The disadvantages of a more sophisticated solution are that the manufacture of sawdust demanding in the production of individual components, both in terms of production and technology. In soldering, high demands are required and a deformation of the blast can occur. In most operating slashes there are sealing problems. If the cutter is damaged by short-circuiting, burning or needing certain parts, it is necessary to send the cutter to repair or order spare parts, since some parts cannot be manufactured in normal production.

These shortcomings are largely eliminated by the solution of the invention. The essence is that the cutter consists of an insulating cover, into which the body of the cutter, which is sealed by a sealing ring, is screwed into, the gas, water and water outlet are connected to the cutter body, a screwed-on tongs holding the electrode and an insulating intermediate piece in the face of the collet, in which the sealing rings are located, the sealing body of the cutter and the nozzle through which the insulating cover nozzle is screwed and which are sealed to each other sealed. The advantage of the solution according to the invention is the constructional simplicity and simplicity of production technology. This plasma cutter can be manufactured and assembled without the need for complex machine equipment. The soldering of the parts is only in a very small extent, which avoids heat deformation and reduces the accuracy of the cutter produced. Also, the number of sealing lips at the incisor according to the invention is limited, which increases operational reliability. The entire assembly of the incisor and eventual replacement in the event of a defect or damage is simple and does not require special preparations. The incisor nozzle is directly cooled, making it possible to increase the productivity of the work. From the point of view of operation, the overall compactness and small size of the plasma cutter are preferred.

The plasma cutter according to the invention can be used for cutting hard-to-cut materials such as high-alloyed steels, copper, brass and the like. An example of an embodiment of a plasma cutter according to the invention is shown in the drawing, where a cross-sectional view of the incisor in the axis - FIG. 1, FIG. 2 is section A-A.

The 3-sealed cutter body 2, to which the inlet 4 and the water outlet S and the gas supply S are connected, is screwed and sealed to the plasma cutting insulating cover 1. At the same time, a negative pole is also supplied through the water outlet 5, which passes through the clamp 7 to electrode 8. The water inlet and outlet of the body 2 of the incisor is solved by means of two grooves 15, so that the cooling water is forced to rotate at the bottom of the incisor and directly cools the nozzle 9 and the insulating cover 1. The gas inlet is screwed on by a tongs 7 which firmly holds the electrode 8 and, by means of grooves along the circumference, directs the supplied plasma gas into the nozzle 9. The protruding part of the collet 7 from the cutter body 2 centers the intermediate insulating intermediate piece 10, which is provided with sealing means. the rings 11, sealing and electrically insulating the cutter body 2 from the nozzle 9, the insulating intermediate piece 10 having a pre-planting shoulder 9, thereby achieving centricity Since the plasma gas flows from the inner side of the insulating intermediate 10 and the cooling water flows directly from the outer side of the nozzle, it is sufficiently cooled. A nozzle 13 is screwed onto the insulating cover 1, on which the sealing ring 12 is positioned, which moves against the sealing ring 12 when it is tightened. The seal between the nozzle 13 and the nozzle 9 is secured by a bevel. Tightening the nozzle 13 onto the insulating cover of the tube 13 presses the nozzle 9 against the insulating matrix 10 and the cutter body 2, thereby ensuring that the nozzle 9 and nozzle 13 are sealed against water and gas. The auxiliary arc current supply 14 is formed by a ring on which the solder is soldered into the opening in the insulating cover 1. The other end of the current supply 14 is adapted to insert the connector. on nozzle 13, thereby providing sufficient contact.

Claims (1)

SUBJECT Plasma cutter for cutting difficult-to-cut materials, characterized in that it consists of an insulating cover (1) into which the incisor body (2j), which is sealed against each other by a sealing ring (3), is connected to the incisor body (2). gas (6), water (4) and water drain (5), into which a collet (7) is screwed, which holds BACKGROUND OF THE INVENTION An electrode (8j) on which an insulating spacer (10) is inserted, in which faces the sealing rings (11), the incisor sealing body (2) and the nozzle (9) through which the nozzle (13) is screwed onto the insulating cover. (11) which are sealed with the sealing ring (12).