Establishment of a connection between a pipe and a block, and block having a pipe

Abstract

The invention relates to a method for establishing a new connection between a block (4) and a pipe (77), wherein the previous pipe (7) is cut off such that a stub (13) remains on the block, around which a supporting connection (16) is then created so that the new pipe (77) can be connected to the supporting connection (16) by welding.

Description

[0001] Making a connection between a pipe and a block and block with pipe

[0002] The invention relates to the production of a connection between a pipe and a block with a pipe.

[0003] Pipes are used to transport media. This can be any fluid, such as gas or oil, that needs to be supplied to a block in general, such as an engine block, a bearing block, or a combustion part, etc.

[0004] The pipe can be connected to the block by a screw connection, a metallurgical connection (i.e. soldering or welding), although the latter cannot be easily replaced when the pipe is renewed.

[0005] It is therefore an object of the invention to solve the above-mentioned problem.

[0006] The object is achieved by a method according to claim 1 and an arrangement according to claim 6.

[0007] The subclaims list further advantageous measures which can be combined as desired to achieve further advantages.

[0008] It shows :

[0009] Figure 1 a block with pipe in the initial state, Figure 2 , 3 process steps and

[0010] Figure 4 a revised block with new pipe.

[0011] The description and the figures represent only exemplary embodiments of the invention.

[0012] Figure 1 shows a device 1 comprising a block 4 and a pipe 7 connected to the block 4.

[0013] The block 4 is preferably part of an oil supply or distribution system.

[0014] The block 4 can preferably have further supply lines or discharge lines.

[0015] The block 4 is metallic and preferably comprises a steel. This is preferably an austenite.

[0016] The tube 7 is also metallic and preferably comprises a steel. This is preferably an austenite.

[0017] Preferably, the tube 7 comprises the same material as the block 4.

[0018] Pipe 7 and block 4 were preferably connected to each other by a soldered connection 10 or other metallurgical connection at least within the block 4 or with the block 4.

[0019] This is achieved during production, for example, through a brazing process in a furnace with block 4 and tube 7 together, or, for example, with several blocks / tubes together. This involves not only the brazing process itself, but also, if necessary, a brazing heat treatment of the metal.

[0020] A solder joint always means a heat treatment of the entire assembly to create the solder joint, which can be done locally in a furnace or only with a block, but only at a higher cost.

[0021] The pipe 7 is to be replaced. Simple removal is not possible with a soldered or welded joint. Therefore, the pipe 7 is severed, but a portion of the pipe 7 is deliberately retained above the block 4 as a stump 13 (Figure 2).

[0022] To create a new connection between a new pipe 77 (Fig. 4) and the existing block 4 with the stump 13, a support structure 16 is therefore created around and / or on the stump 13 (Fig. 3).

[0023] The support structure 16 can be produced by known additive forming processes such as LMD or WAAM, i.e. a welding application of material in the form of powder or by means of a wire.

[0024] Other additive techniques are also possible.

[0025] The new tube 77 preferably has the same material as the tube 7 or preferably as the block 4.

[0026] The support structure 16 is or will be created in such a way that the new pipe 77 can or will be inserted there.

[0027] The new pipe 77 is then or is welded there to the support structure 16 and / or stump 13.

[0028] The welding of the new tube 77 to the support structure 16 and / or stub 13, or possibly also to block 4, can be carried out by pure remelting or with welding filler material. In this case, the same material is preferably used as the welding filler material as for the support structure 16.

[0029] A brazing joint always requires heat treatment to create the brazing joint, which can be done locally on-site in a furnace that isn't available, or even with a single block, but this is more complex. This manufacturing process can then be used.

[0030] Preferably, the new metallurgical weld between the new pipe 77 and the support structure 16 and / or block 4 / stump 13 does not require heat treatment. This can preferably be achieved through a targeted selection of materials.

[0031] This then preferably also applies to the material of the block 4 and / or the new pipe 77 as well as to the material of the support structure 16 and the welding filler.

[0032] For the material of the support structure 16, a steel containing manganese (Mn), silicon (Si), chromium (Cr) and nickel (Ni) is preferably used.

[0033] The material for block 4 should also preferably be a steel containing chromium (Cr) and nickel (Ni), but preferably without manganese (Mn) and with silicon (Si). As is well known, the proportions of phosphorus (P), nitrogen (N2), and sulfur (S) in both steels should be kept low.

Claims

Claims 1. Method for producing an assembly (11) with a new connection between an existing block (4) and a new pipe (77), wherein a previous pipe (7) is separated from the block (4) in such a way that a stump (13) remains on the block (4), then a support connection (16) is created around and / or on the stump (13), and that the new pipe (77) is connected to the support connection (16) and / or the stump (13) by welding.

2. Method according to claim 1, wherein the previous tube (7) was connected to the block (4) by a soldered joint (10).

3. Method according to one or both of claims 1 or 2, wherein the support connection (16) is produced by an additive process, in particular by welding processes.

4. Method according to one or more of the preceding claims, in which the welded connection between the new pipe (77) and the support connection (16) does not require any post-heat treatment.

5. Method according to one or more of the preceding claims, in which a steel with manganese (Mn), silicon (Si), chromium (Cr) and nickel (Ni) is used for the material of the support structure (16) and / or a steel with chromium (Cr), nickel (Ni), silicon (Si) but preferably without Manganese (Mn) is used.

6. Arrangement (11) comprising a block (4) which has a stump (13) as part of a severed tube (7) which protrudes from the block (4) and is connected in the block (4) by soldering (10), a support structure (16) surrounding the stump (13), wherein the support structure (16) is metallurgically connected to the stump (13) and to a new tube (77) which (77) is metallurgically connected, in particular welded, to the support structure (16).

7. Arrangement according to claim 6, wherein a steel with manganese (Mn), silicon (Si), chromium (Cr) and nickel (Ni) is used for the material of the support structure (16) and / or a steel with chromium (Cr), nickel (Ni), silicon (Si) but preferably without manganese (Mn) is used for the material of the block (4).

8. Arrangement according to one or both of the preceding claims 6 or 7, wherein at least the block (4) comprises an austenitic steel.

9. Arrangement according to one or more of claims 6, 7 or 8, wherein the material for the block (4) is the same as for the new pipe (77).

10. Arrangement according to one or more of claims 6, 7, 8 or 9, wherein the material for the support structure (16) is is the same as the material for the welded connection between the support structure (16) and the new pipe (77).

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