FI73152B - ANORDNING FOER KRAGNING AV ROER. - Google Patents

Description

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SUOMI FINLAND

(Fl) (21) Patent application - Patentansökning 791685 (22) Application date - Ansöknirtgsdag 28,05.79

Patent * And the Board of Registration (23) Start date -G iltighetsdag 28.05.79

Patent- och registerstyrelsen (41) Published to the public - Biivit offentiig 29.11.80 (44) Date of publication and of publication. - 29 05 87

Ansökan utiagd och utl.skriften pubiicerad J '' (86) Kv. Application-Int. ansökan (32) (33) (31) Pyyderty priority - Begärd priority (71) Oy Wärtsilä Ab, Värtsilä, Fl; Patent Department, John Stenbergin raja 2, 00530 Helsinki, Finland-Fin 1 and (FI) (72) Elmer Peltola, Ylivieska, Raimo Poutiainen, Fabric,

Lauri Peurala, Ylivieska, Finland-Finland (Fl) (54) Equipment for pipe collar - Anordning för kragning av rör

The invention relates to a device according to the preamble of claim 1.

Devices for collaring the ends of pipes by plastic shaping are already known. However, the known devices have the disadvantage of their poor suitability for pipes of different sizes and thicknesses, since their design does not take into account, among other things, the adjustment resources required for the different wall thicknesses of the pipes. The result has been unevenness in the quality of the collar and structural defects in the collar.

The object of the invention is to provide a new universal machine for collaring pipes which is simple and reliable in construction and which is suitable for collaring pipes of different sizes and thicknesses.

The features of the invention appear from the characterizing part of claim 1. In the structure according to the invention, it is possible to select in a simple manner the radius of curvature of the fold of the collar according to the thickness of the wall of the pipe, whereby the quality of the collar remains uniformly good regardless of the thickness of the pipe.

73152

To attach the press mandrel to the guide carriage, the guide carriage may be provided with guide wires or the like on which the press mandrel is mounted. In this case, the printing mandrel. the adjustment of the position with respect to the guide carriage can advantageously be provided by means of an adjusting screw which passes transversely through the pressing mandrel.

The displacement of the guide carriage relative to its support piece can advantageously be performed by means of a power cylinder connected to the steering carriage.

The rotatable unit to which the guide carriage support piece is attached may be a bearing at one end, a substantially hollow cylinder-blade piece. The device is also provided with means for supporting and holding the collarable tube in place during plastic shaping of the tube end.

The invention will now be described in more detail with reference to the accompanying drawing, in which Figure 1 shows a general arrangement of a collar device as a principle view.

Fig. 2 shows a section II-II of Fig. 1

Figure 3 shows the attachment of the press mandrel to its guide carriage

In the drawing, reference numeral 1 denotes a rotatable cylinder body fixed to a shaft 14 driven by a suitable motor (not shown in the figures) by means of a unit 5. The press mandrel 8 is mounted on its guide carriages 7 on the guide carriage 7 and the position of the press mandrel relative to the guide carriage 7 is determined by In this way, the radius of rotation of the bending point 17 of the collar 16 can be adjusted according to the wall thickness of the pipe to be collared.

The guide carriage 7 is mounted on the support piece 2. In order to move the guide carriage relative to the support piece 2 and thus to tilt the pressing mandrel 8 relative to the tube 12, the guide carriage has guide grooves 9 »corresponding to the guide rails 13 in the support piece. The control carriage 7 is moved by means of a power cylinder 15.

The pressing mandrel 8 with its tilting means is attached to the cylinder body 1 by means of a beam 4 and support rods 3. In addition, the device has a screw rod β for moving the pressing mandrel 8 in the radial direction of the cylinder body for collaring pipes of different diameters 3 73152. Thus, the support piece 2 is movably supported relative to the support rods 5.

Figure 3 shows in broken lines the extreme position of the printing mandrel 8 at the end of the pipe collar. The tilting and adjusting movements of the press mandrel 8 are indicated by arrows. The fastening of the tube 12 can be carried out in a manner known per se, for which reason it is not illustrated in more detail in the drawing than by roughly dotted lines.

The invention is not limited to the embodiment shown, but several variations of the invention are conceivable within the scope of the appended claims.

Claims (3)

An apparatus for plastically shaping the end of a tube (12) by plastic shaping, the apparatus comprising a press mandrel (8) placed against the inner surface of the tube (12) and means for rotating the press mandrel (8) along the inner surface of the tube (12) and simultaneously tilting against the tube wall (12) outwardly, and in which the press mandrel (8) is supported on a guide carriage (7) fitted to a support body (2) provided with curved guide tracks (13) such that the guide carriage (7) is movable by the curved guide tracks (9) to effect tilting movement of the press mandrel (8). , 13) guided relative to the support piece (2) by a force member (15) connected to the guide carriage, and to effect rotation of the press mandrel (8) the support piece (2) is fixed to the rotatable unit (1), characterized in that the press mandrel (8) is radially adjustable 7). Apparatus according to claim 1, characterized in that said guide carriage (7) is provided with guide wires (10) or the like transverse to the axis of the press mandrel, along which the press mandrel (8) can be moved, and that the position of the press mandrel (8) is arranged to be provided by means of an adjusting screw (11) passing transversely through the pressing mandrel (8). Device according to any one of the preceding claims, characterized in that said unit (1) is a substantially hollow cylinder body (1) mounted at one end.