Machining system and method for machining a tubular product

Abstract

The present invention relates to a machining system (1000) arranged to machine a tubular product (100). The machining system (1000) comprises a machining set (200) and a clamping unit (300). The machining set (200) is arranged to be removably connectable with the clamping unit (300). The clamping unit (300) is arranged to be removably connectable with the tubular product (100). The present invention further relates to a method for machining a tubular product (100).

Description

[0001] Machining system and method for machining a tubular product

[0002] FIELD OF THE INVENTION

[0003] The present invention generally relates to a machining system arranged to machine a tubular product. The present invention further relates to a method for machining a tubular product.

[0004] BACKGROUND OF THE INVENTION

[0005] A variety of tools are known from the prior art for machining, such as for cutting a tubular or round-bar type piece. One exemplary tool of the prior art is an apparatus comprising a clamping mechanism adapted to be fastened to the workpiece rotatably there around. The clamping mechanism has attached thereto a tool unit, which is provided with adjustment means for displacing said tool unit relative to the clamping mechanism towards or away from the workpiece. The clamping mechanism included a frame element and first and second arms extending therefrom, the arms being articulated at one end to the frame element of the clamping mechanism and each arm has its free end fitted with a bearing axle, which is provided with at least one bearing wheel. The clamping mechanism has its frame element provided in a rotatable and axially immobile fashion with a threaded shaft, whose first end has a right-handed thread provided with a first nut and whose second end has a left-handed thread provided with a second nut. The threaded shaft is provided with a member for rotating the threaded shaft, and the first arm and the first nut are articulated to each other by means of a first suspension arm and the second arm and the second nut are articulated to each other by means of a second suspension arm.

[0006] This apparatus has functioned excellently. However, there might be situations, where there is need for cutting tubular which has a large diameter so that the arms become very long and the device become heavy to handle.

[0007] Furthermore, products made of some material such as steel, may be machined only with blades made of compatible material. Especially, there is needed to improve ways to cut and bevel tubular products made of steel.

[0008] BRIEF DESCRIPTION OF THE PRESENT INVENTION

[0009] An object of the present invention is to provide a machining system arranged to machine a tubular product and a method for machining a tubular product to alleviate the disadvantages discussed above.

[0010] The object of the invention can be achieved by the features of independent claims.

[0011] The invention relates to a system according to claim 1. In addition, the invention relates to a method according to claim 12. The invention relates to an apparatus for machining workpieces, especially cutting and bevelling tubular products. According to an embodiment of the invention the system comprises a clamping unit, which is adapted to be fastened and secured on the product to be machined. Furthermore, the system comprises a machining set. The machining set is arranged to be removably connectable with the clamping unit and the clamping unit is arranged to be removably connectable with the tubular product.

[0012] Preferably, the machining set comprises separate a cutting device and a bevelling device.

[0013] In other words, the cutting device and the bevelling device are arranged to be separately connected with the clamping unit.

[0014] This enables first cutting the tubular product with the cutting device and then bevelling the end of the tubular product with the bevelling device.

[0015] The end of the tubular product may be bevelled for instance for welding.

[0016] In some embodiments, the clamping unit comprises a clamping chain. The clamping chain is arranged to be positioned around the tubular product to be machined. The clamping chain is arranged to be positioned via the first chain tightening arrangement and via the second chain tightening arrangement, the cutting device is arranged to be connected to the first chain tightening arrangement and to the second chain tightening arrangement.

[0017] In some embodiments, the machining system comprises a machining set and a clamping unit, the machining set is arranged to be removably connectable with the clamping unit comprising a chain clamping device comprising:

[0018] - a clamping chain arranged to be positioned on a tubular product to surround the tubular product;

[0019] - a first chain tightening arrangement and a second chain tightening arrangement arranged to receive the clamping chain and arranged to move the clamping chain away from the tubular product and towards the tubular product, the first chain tightening arrangement and a second chain tightening arrangement are arranged to be positioned on the tubular product; and

[0020] - a moving arrangement provided to the first chain tightening arrangement, the moving arrangement is arranged to move the first chain tightening arrangement along the clamping chain, and second chain tightening arrangement and the machining set are arranged to move together with the first chain tightening arrangement, and

[0021] - the clamping unit is arranged to be removably connectable with the tubular product .

[0022] In some embodiments, the clamping chain is arranged to be tightened around the tubular product to be machined with the first chain tightening arrangement and the second tightening arrangement.

[0023] In some embodiments, the clamping chain tightened around the tubular product with the first chain tightening arrangement and the second tightening arrangement is secured so that it remains in its position during machining the tubular product with the cutting device and with the bevelling devise. In some embodiments, the clamping chain tightened around the tubular product with the first chain tightening arrangement and the second tightening arrangement is arranged to be remained in its position during machining the tubular product with the cutting device and with the bevelling devise.

[0024] Furthermore, the clamping chain, the first chain tightening arrangement and the second tightening arrangement may be remained in their positions when the cutting device is replaced by the bevelling device. This makes the cutting and bevelling faster as the positioning of the clamping chain requires measurement and tightening of the chain, and that task is avoided.

[0025] In some embodiments, the machining system arranged to machine a tubular product made of any of the following material cast iron, ductile iron, steel and stainless steel.

[0026] In some embodiments, the method is for machining a tubular product so that the tubular product made of steel or stainless steel.

[0027] It should be noted that, the machining devices used for machining steel and stainless steel must have blades made of suitable material for machining steel and stainless steel for instance blades comprising diamonds are used for machining steel and stainless steel.

[0028] In some embodiments, the tubular product is a pipe or a tube.

[0029] In some embodiments, the tubular product having a wall of the tubular product, and the thickness of the wall of the tubular product being in the range of 15 - 30 mm.

[0030] In some embodiments, the tubular product having a wall of the tubular product, and the thickness of the wall of the tubular product being 15 mm or more.

[0031] In some embodiments, the tubular product having a wall of the tubular product, and the thickness of the wall of the tubular product being 20 mm or more.

[0032] In some embodiments, the tubular product having a diameter of the tubular product, and the diameter of the wall of the tubular product being 350 mm or more. In some embodiments, the tubular product having a diameter of the tubular product, and the diameter of the wall of the tubular product being in the range of 350 mm - 10 000 mm.

[0033] In some embodiments, the tubular product having a diameter of the tubular product, and the diameter of the wall of the tubular product being in the range of 350 mm - 5000 mm.

[0034] In some embodiments, the cutting device comprises circular cutting blade which is a rotating cutting blade arranged to be rotated around a first blade axis, the first blade axis is parallel to longitudinal direction of the tubular product. The bevelling device comprises a rotating bevelling blade arranged to be rotated around a second blade axis, the second blade axis is perpendicular to longitudinal direction of the tubular product.

[0035] In some embodiments, the rotating bevelling blade being a mill grinder.

[0036] In some embodiments, the rotating bevelling blade comprises a portion having a conical shape.

[0037] In some embodiments, the rotating bevelling blade comprises a portion having a conical shape with a flat end. In some embodiments, the rotating bevelling blade comprises a portion having a conical shape with a flat end, the bevelling blate is arranged to taper in a direction towards the centreline of the cross-section of the tubular product.

[0038] In other words, the rotating bevelling blade having a shape of a truncated cone. In some embodiments, the rotating bevelling blade is arranged to provide an edge of the tubular product with a bevel.

[0039] In some embodiments, the rotating bevelling blade is arranged to provide an edge of the tubular product with a bevel for welding.

[0040] In some embodiments, the cutting device and / or the bevelling device comprise a hydraulic motor or pneumatic motor. This enables operating in wet conditions and under water.

[0041] In some embodiments, the cutting device and the bevelling device comprise a hydraulic motor or pneumatic motor. This enables operating in wet conditions and under water.

[0042] In some embodiments, the cutting device and / or the bevelling device comprise a hydraulic motor. The hydraulic motor operates with more compact power unit than the pneumatic motor and the hydraulic motor provides more torque than the pneumatic motor

[0043] The present invention further relates to a method for machining a tubular product. The method is carried out with the machining system comprising a machining set and a clamping unit, the machining set is arranged to be removably connectable with the clamping unit, the clamping unit is arranged to be removably connectable with the tubular product. The method comprises: a step of positioning and supporting the clamping unit on the tubular product; a step of cutting the tubular product with the cutting device, the machining set comprises a cutting device, and the cutting device is connected with the clamping unit; a step of removing the cutting device from the clamping unit after the step of cutting the tubular product; the machining set comprises a bevelling device, and the method comprises a step of connecting the bevelling device with the clamping unit after the step of removing the cutting device; and a step of bevelling an end of the tubular product with the bevelling device connected with the clamping unit.

[0044] In other words, the clamping unit is arranged to remain in its position on the tubular product when cutting and bevelling are carried out with separate devices

[0045] The present invention offers advantages over the known prior art, such as it simplifies the machining procedure. In addition, the apparatus is light to use. In addition, the present invention enables secure and easy cutting and bevelling of large diameter tubular products. Furthermore, embodiments of the invention allow machining various materials such as steel and stainless steel.

[0046] BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Next the invention will be described in greater detail with reference to exemplary embodiments in accordance with the accompanying drawings, in which: Figure 1 illustrates 3d view of one embodiment of the machining system according to the present invention,

[0048] Figure 2 illustrates a top view of the embodiment shown in figure 1,

[0049] Figure 3 illustrates a front view of one embodiment of the machining system according to the present invention,

[0050] Figure 4 illustrates a cross section of one embodiment of the machining system according to the present invention,

[0051] Figure 5 illustrates a front view a second chain tightening arrangement and a first chain tightening arrangement connected with a clamping chain of the machining system according to the present invention,

[0052] Figure 6 illustrates a side cross section of the machining system according to the present invention wherein the machining set comprises a cutting device,

[0053] Figure 7 illustrates a side cross section of the machining system according to the present invention wherein the machining set comprises a bevelling device,

[0054] Figure 8 illustrates 3d view of one embodiment of the machining system according to the present invention,

[0055] Figure 9 illustrates one embodiment of the tubular product according to the present invention,

[0056] Figure 10 illustrates one embodiment of the first chain tightening arrangement according to the present invention, and

[0057] Figure 11 illustrates some embodiments of method according to the present invention.

[0058] DETAILED DESCRIPTION

[0059] Figures 1 - 8 and 10 illustrate examples of a machining system 1000 according to different embodiments of the invention.

[0060] The invention relates to a machining system 1000 arranged to machine a tubular product 100, the machining system 1000 comprises a machining set 200 and a clamping unit 300, the machining set 200 is arranged to be removably connectable with the clamping unit 300, and the clamping unit 300 is arranged to be removably connectable with the tubular product 100.

[0061] In other words, the clamping unit 300 is arranged to be secured on the tubular product during machining the tubular product with the machining set 200.

[0062] In other words, the clamping unit 300 is arranged to be supported on the tubular product during machining the tubular product with the machining set 200. In other words, the two or more separate machining devices 201,202 are arranged to be removably connectable with the clamping unit 300. Thus, the clamping unit 300 is arranged to be connected with only one of the two or more separate machining devices 201,202 at the same time.

[0063] In other words, separate machining devices 201,202 are arranged to be individually connected with the clamping unit 300.

[0064] In some embodiments, the machining system 1000 comprises a machining set 200 and a clamping unit 300, the machining set 200 comprises two or more separate machining devices 201,202, the two or more separate machining devices 201,202 of the machining set 200 are arranged to be separately and removably connectable with the clamping unit 300.

[0065] In some embodiments, the clamping unit 300 is arranged receive one separate machining device of the machining set 200.

[0066] In some embodiments, the machining set 200 comprises a cutting device 202 and a bevelling device 201, the cutting device 202 and the bevelling device 201 are arranged to be separately connected with the clamping unit 300.

[0067] In some embodiments, the two or more separate machining devices 201,202 include a cutting device 202 and a bevelling device 201, the cutting device 202 and the bevelling device 201 are arranged to be separately connectable with the clamping unit 300.

[0068] In some embodiments, the two or more separate machining devices 201,202 comprise a cutting device 202 and a bevelling device 201, the cutting device 202 and the bevelling device 201 are arranged to be separately connectable with the clamping unit 300.

[0069] In other words, the cutting device 202 may be connected with the clamping unit 300, or the bevelling device 201 may be connected with the clamping unit 300, or the cutting device 202 and the bevelling device 201 are separately to be connected with the clamping unit 300. Thus, the clamping unit 300 may be without the two or more separate machining devices 201,202 as shown in figure 5.

[0070] Figures 1,2 and 7 show the bevelling device 201 connected with the clamping unit 300. Figures 3,6 and 7 show the cutting device 202 connected with the clamping unit 300.

[0071] The tubular product 100 is illustrated in figure 9. The tubular product 100 having a first end LI and a second end L2 as shown in figure 9. The tubular product 100 having a longitudinal direction L extending in the direction between the first end LI and the second end L2. In other words, the wall 101 of tubular product 100 extending between the first end LI and the second end L2.

[0072] In some embodiments, the tubular product 100 having a longitudinal direction L, the two or more separate machining devices 201,202 include a cutting device 202 and a bevelling device 201, the cutting device 202 and the bevelling device 201 are arranged to be separately connectable with the clamping unit 300, the cutting device 202 comprises a rotating cutting blade 2020 arranged to be rotated around a first blade axis F, the first blade axis F is parallel to longitudinal direction L of the tubular product 100, and the bevelling device 201 comprises a rotating bevelling blade 2010 arranged to be rotated around a second blade axis S, the second blade axis S is perpendicular to longitudinal direction L of the tubular product 100.

[0073] In some embodiments, the rotating cutting blade 2020 is a cutting disc.

[0074] In some embodiments, the rotating cutting blade 2020 is a cutting disc saw.

[0075] In some embodiments, the rotating cutting blade 2020 is a cutting disc comprising diamonds.

[0076] In some embodiments, the second blade axis S is transversal to the first blade axis F.

[0077] In other words, the second blade axis S extending in a transversal direction to the first blade axis F.

[0078] In some embodiments, the cutting device 202 is arranged to cut the tubular product 100.

[0079] In some embodiments, the cutting device 202 is arranged to cut the tubular product 100 perpendicular to the longitudinal direction L of the tubular product 100.

[0080] In some embodiments, the cutting device 202 is arranged to cut tubular product 100 so that the tubular product 100 is perpendicular to the longitudinal direction L of the tubular product 100.

[0081] In some embodiments, the bevelling device 201 is arranged to bevel a first end LI of the tubular product 100.

[0082] In some embodiments, the first end LI of the tubular product 100 is perpendicular to the longitudinal direction L of the tubular product 100, and the bevelling device 201 is arranged to bevel the first end LI of the tubular product 100. In other words, the bevelling device is arranged to provide a bevel to the end of the tubular product 100.

[0083] In some embodiments, the clamping unit 300 comprises a chain clamping device 301 as shown in Figure 1.

[0084] In some embodiments, the chain clamping device 301 comprises a clamping chain 400 arranged to be positioned on a tubular product 100 to surround the tubular product 100; a first chain tightening arrangement 31 and a second chain tightening arrangement 32 arranged to receive the clamping chain 400 and arranged to move the clamping chain 400 away from the tubular product 100 and towards the tubular product 100, the first chain tightening arrangement 31 and a second chain tightening arrangement 32 are arranged to be positioned on the tubular product 100; and a moving arrangement 33 provided to the first chain tightening arrangement 31, the moving arrangement 33 is arranged to move the first chain tightening arrangement 31 along the clamping chain 400, and second chain tightening arrangement 31 and the machining set 200 are arranged to move together with the first chain tightening arrangement 31, and the clamping unit 300 is arranged to be removably connectable with the tubular product 100.

[0085] In some embodiments, the chain clamping device 301 comprises a clamping chain 400 arranged to be positioned on a tubular product 100 to surround the tubular product 100; a first chain tightening arrangement 31 and a second chain tightening arrangement 32 arranged to receive the clamping chain 400 and arranged to move the clamping chain 400 away from the tubular product 100 and towards the tubular product 100, the first chain tightening arrangement 31 and a second chain tightening arrangement 32 are arranged to be positioned on the tubular product 100.

[0086] In other words, the first chain tightening arrangement 31 and the second chain tightening arrangement 32 are arranged to tight and loose the clamping chain 400 on the tubular product 100.

[0087] In some embodiments, each of the separate machining devices 201,202 is provided with a machining device connecting arrangement 2001, the chain clamping device 301 is provided with a clamping device connecting arrangement 3001, and the machining device connecting arrangement 2001 and the clamping device connecting arrangement 3001 are arranged to be removably connected. In other words, the separate machining devices 201,202 are connected to the chain clamping device 301 with the machining device connecting arrangement 2001 and the clamping device connecting arrangement 3001.

[0088] In some embodiments, the chain clamping device 301 comprises: a clamping chain 400 arranged to be positioned on a tubular product 100 to surround the tubular product 100; a first chain tightening arrangement 31 and a second chain tightening arrangement 32 arranged to receive the clamping chain 400 and arranged to move the clamping chain 400 away from the tubular product 100 and towards the tubular product 100, the first chain tightening arrangement 31 and a second chain tightening arrangement 32 are arranged to be positioned on the tubular product 100; and a moving arrangement 33 provided to the first chain tightening arrangement 31, the moving arrangement 33 is arranged to move the first chain tightening arrangement 31 along the clamping chain 400, and second chain tightening arrangement 31 and the machining set 200 are arranged to move together with the first chain tightening arrangement 31.

[0089] In some embodiments, the moving arrangement 33 comprises a moving arrangement connector, the moving arrangement connector is arranged to be connected with a handheld electric operated drill.

[0090] This enables moving the first chain tightening arrangement 31 along the clamping chain 400 with the handheld electric operated drill.

[0091] In some embodiments, the moving arrangement 33 comprises a moving chain arranged to transfer power from the moving arrangement connector to the first axis chain wheel 314.

[0092] In some embodiments, the moving arrangement 33 comprises a moving chain and a crank, and the moving chain is arranged to transfer power from the crank to the first axis chain wheel 314.

[0093] This enables moving the cutting device and the bevelling device by using the crank with hand.

[0094] In some embodiments, the clamping chain 400 is a roller chain. In other words, the clamping chain 400 comprises rollers provided between inner link plates. The inner link plates are connected with outer link plates. In some embodiments, the clamping chain 400 is double-strand or triple-strand roller chain.

[0095] In some embodiments, the clamping chain 400 comprises one uniform clamping chain portion.

[0096] In some embodiments, the clamping chain 400 comprises two or more clamping chain portions 401,402, and the method comprises connecting the two or more clamping chain portions 401,402 together.

[0097] In some embodiments, the clamping chain 400 comprises one or more clamping chain portions.

[0098] In some embodiments, the clamping chain 400 comprises two or more clamping chain portions 401,402, and the method comprises connecting the two or more clamping chain portions 401,402 together.

[0099] In some embodiments, the clamping chain 400 comprises two or more clamping chain portions 401,402 and a chain connecting element (not shown in figures). The chain connecting element may be slip fit comprising a cotter pin or connecting link plate with spring clip.

[0100] ' In other words, a part of the clamping chain 400 is arranged to be in contact with the tubular product 100 and a part of the clamping chain 400 is arranged to be in contact with the first chain tightening arrangement 31 and the second chain tightening arrangement 32.

[0101] In some embodiments, the first chain tightening arrangement 31 comprises a first adjusting chain wheel 3311, the first adjusting chain wheel 3311 is arranged to be positioned in contact with the clamping chain 400, and the first adjusting chain wheel 3311 is arranged to move the clamping chain 400 away and towards the tubular product 100, at least a part of the first adjusting chain wheel 3311 is arranged to be positioned between the clamping chain 400 and the tubular product 100; and the second chain tightening arrangement 32 comprises a second adjusting chain wheel 3321, the second adjusting chain wheel 3321 is arranged to be positioned in contact with the clamping chain 400, and the second adjusting chain wheel 3321 is arranged to move the clamping chain 400 away and towards the tubular product 100, at least a part of the second adjusting chain wheel 3321 is arranged to be positioned between the clamping chain 400 and the tubular product 100.

[0102] In other words, the clamping chain 400 is arranged to be tightened with a movement of the first adjusting chain wheel 3311 away from tubular product 100 in a transverse direction to the longitudinal direction L of the tubular product 100, and a movement of the second adjusting chain wheel 3321 away from the tubular product 100 in a transverse direction to the longitudinal direction L of the tubular product 100.

[0103] In some embodiments, the first adjusting chain wheel 3311 is provided to a first adjusting chain wheel axis 3331, the first adjusting chain wheel axis 3331 is rotatably connected to a first adjusting body 3410, and the first adjusting body 3410 is arranged to be moveably connected to the first tightening arrangement body 312 with a first adjusting screw 3411, and the first adjusting screw 3411 is arranged to move the first adjusting body 3410 relative to the first tightening arrangement body 312.

[0104] In some embodiments, the first adjusting body 3410 is arranged to be moveably connected to the first tightening arrangement body 312 with and a first adjusting spring 3412 and with a first adjusting screw 3411. The first adjusting spring 3412 is arranged to enable spring effect between the tubular product 100 and the first chain tightening arrangement 31. This is shown in figure 10.

[0105] In some embodiments, the second adjusting body 3420 is arranged to be moveably connected to the second tightening arrangement body 322 with a second adjusting spring 3422 and a second adjusting screw 3421 arranged to move the second adjusting body 3420 relative to the second tightening arrangement body 322. The second adjusting spring 3422 is arranged to enable spring effect between the tubular product 100 and the second chain tightening arrangement 32. This is shown in figure 8.

[0106] In some embodiments, the clamping chain 400 is arranged to be positioned between the first axis 311 and the tubular product 100, the clamping chain 400 is arranged to be positioned between the second axis 313 and the tubular product 100, and the first adjusting chain wheel axis 3331 is arranged to be positioned between the clamping chain 400 and the tubular product 100 as shown in figure 4.

[0107] In some embodiments, the first chain tightening arrangement 31 comprises a first axis 311 provided with a first axis chain wheel 314 and the first chain tightening arrangement 31 comprises a second axis 313 provided with a second axis chain wheel 315, and the first chain tightening arrangement 31 is supported to the tubular product 100 with the clamping chain 400, the first axis chain wheel 314 is connected with the clamping chain 400, the second axis chain wheel 315 is connected with the clamping chain 400, and the first adjusting chain wheel 3311 is connected with the clamping chain 400.

[0108] In some embodiments, the first adjusting chain wheel 3311 is provided between the first axis chain wheel 314 and the second axis chain wheel 315.

[0109] In some embodiments, the second adjusting chain wheel 3322 is provided to a second adjusting chain wheel axis 3332, the second adjusting chain wheel axis 3332 is rotatably connected to a second adjusting body, and the second adjusting body is arranged to be moveably connected to the second tightening arrangement body 322 with a second adjusting screw arranged to move the second adjusting body relative to the second tightening arrangement body 3122.

[0110] In some embodiments, the clamping chain 400 is arranged to be positioned between the third axis 321 and the tubular product 100, the clamping chain 400 is arranged to be positioned between the fourth axis 323 and the tubular product 100, and the second adjusting chain wheel axis 3332 is arranged to be positioned between the clamping chain 400 and the tubular product 100 as shown in figure 4.

[0111] In some embodiments, the second chain tightening arrangement 32 comprises a third axis 321 provided with a third axis chain wheel 324 and the second chain tightening arrangement 32 comprises a fourth axis 323 provided with a fourth axis chain wheel 325, and the second chain tightening arrangement 32 is supported onto the tubular product 100 with the clamping chain 400, the third axis chain wheel 324 is connected with the clamping chain 400, the fourth axis chain wheel 325 is connected with the clamping chain 400, and the second adjusting chain wheel 3322 is connected with the clamping chain 400.

[0112] In other words, the clamping chain 400 is arranged to movably support the first chain tightening arrangement 31 and the second chain tightening arrangement 32 onto the tubular product 100, and the clamping chain 400 is arranged to guide movement of the first chain tightening arrangement 31 and the second chain tightening arrangement 32 on the tubular product 100.

[0113] In some embodiments, the second adjusting chain wheel 3322 is provided between the third axis chain wheel 324 and the fourth axis chain wheel 325 the third axis 321 is provided with a third axis chain wheel 324 and the fourth axis 323 is provided with a fourth axis chain wheel 325.

[0114] In some embodiments, the first chain tightening arrangement 31 comprises a first tightening arrangement body 312, a first axis 311, a second axis 313, a first supporting roll 3111 and a second supporting roll 3112, a third supporting roll 3113 and a fourth supporting roll 3114.

[0115] In some embodiments, the first axis 311 is provided with a first axis chain wheel 314 and the second axis 313 is provided with a second axis chain wheel 315; the first axis 311 extending from the first supporting roll 3111 to the second supporting roll 3112, the first axis 311 is rotatably connected to the first tightening arrangement body 312, the second axis 313 extending from the third supporting roll 3113 to the fourth supporting roll 3114, the second axis 313 is rotatably connected to the first tightening arrangement body 312.

[0116] In some embodiments, the first, second, third and fourth supporting rolls 3111, 3112, 3113,3114 are arranged to be rolled around the tubular product 100, the first axis chain wheel 314 and the second axis chain wheel 315 are compatible with the clamping chain 400, the first axis chain wheel 314 is provided between the first supporting roll 3111 and the second supporting roll 3112, the second axis 313 is provided with a second axis chain wheel 315, the second axis chain wheel 315 is provided between the third supporting roll 3113 and the fourth supporting roll 3114, and the first axis chain wheel 314 and the second axis chain wheel 315 are arranged to be rolled along the clamping chain 400.

[0117] The first, second, third and fourth supporting rolls 3111, 3112, 3113,3114 provide a stable support to the first chain tightening arrangement 31, so that the first adjusting chain wheel 3311 may be moved in a direction away from the tubular product 100.

[0118] In some embodiments, a moving arrangement 33 is provided to the first chain tightening arrangement 31, the moving arrangement 33 comprises a rotating mechanism 3200 arranged to rotate the first axis chain wheel 314.

[0119] In some embodiments, the first axis chain wheel 314 comprises teeth arranged to enter between the rollers of the clamping chain 400. In other words, the teeth of the first axis chain wheel 314 are arranged to provide the movement of the first chain tightening arrangement 31.

[0120] In other words, the clamping chain 400 is arranged to be secured on the tubular product 100 with a friction force, the first chain tightening arrangement 31 and the second chain tightening arrangement 32 are arranged to move to a part of the clamping chain 400 away from the tubular product 100 to provide the friction force between the tubular product 100 and a part of the clamping chain 400 which is in contact with the tubular product 100. This means that, the clamping chain 400 is arranged to be supported on the tubular product 100 with the friction force.

[0121] In some embodiments, the second chain tightening arrangement 32 comprises a second tightening arrangement body 322, a third axis 321, a fourth axis 323, a fifth supporting roll 3211, a sixth supporting roll 3212, a seventh supporting roll 3213 and an eight supporting roll 3214.

[0122] In some embodiments, the second adjusting chain wheel 3322 is rotatably connected to a second adjusting body, and the second adjusting body is arranged to be moveably connected to the second tightening arrangement body 322 with a second adjusting screw arranged to move the second adjusting body relative to the second tightening arrangement body 322.

[0123] In some embodiments, the third axis 321 is provided with a third axis chain wheel 324 and the fourth axis 323 is provided with a fourth axis chain wheel 325.

[0124] In some embodiments, the third axis 321 extending from the fifth supporting roll 3211 to the sixth supporting roll 3212, the third axis 321 is rotatably connected to the second tightening arrangement body 322.

[0125] In some embodiments, the fourth axis 323 extending from the seventh supporting roll 3213 to the eighth supporting roll, the fourth axis 323 is rotatably connected to the second tightening arrangement body 322.

[0126] In some embodiments, the fifth, sixth, seventh and eighth supporting rolls 3211, 3212, 3213, 3214 are arranged to be rolled around the tubular product 100.

[0127] In some embodiments, the third axis chain wheel 324 and the fourth axis chain wheel 325 are compatible with the clamping chain 400.

[0128] In some embodiments, the third axis chain wheel 324 is provided between the fifth supporting roll 3211 and the sixth supporting roll 3212.

[0129] - the fourth axis 323 is provided with a fourth axis chain wheel 325, the fourth axis chain wheel 325 between the seventh supporting roll 3213 and the eighth supporting roll 3214.

[0130] In some embodiments, the third axis chain wheel 324 and the fourth axis chain wheel 325 are arranged to be rolled along the clamping chain 400.

[0131] The fifth, sixth, seventh and eighth supporting rolls 3211, 3212, 3213, 3214 provide a stable support to the second chain tightening arrangement 312, so that the second adjusting chain wheel 3321 may be moved in a direction away from the tubular product 100. In some embodiments, at least a part of the two or more separate machining devices 201,202 is arranged to be positioned between the first chain tightening arrangement 31 and the second chain tightening arrangement 32.

[0132] In some embodiments, at least a part of the machining set 200 is arranged to be positioned between the first chain tightening arrangement 31 and the second chain tightening arrangement 32.

[0133] In some embodiments, the two or more separate machining devices 201,202 are arranged to extend between the first chain tightening arrangement 31 and the second chain tightening arrangement 32.

[0134] In some embodiments, the machining set 200 is arranged to extend between the first chain tightening arrangement 31 and the second chain tightening arrangement 32.

[0135] The first chain tightening arrangement 31 and the second chain tightening arrangement 32 provide a stable support to the two or more separate machining devices 201,202 so that the first chain tightening arrangement 31 and the second chain tightening arrangement 32 are arranged to be moved along the clamping chain 400.

[0136] It should be noted that the first chain tightening arrangement 31 and the second chain tightening arrangement 32 are arranged to move the clamping chain 400 in a direction away from the tubular product 100.

[0137] In some embodiments, the machining device connecting arrangement 2001 comprises a first connecting element 251 and a second connecting element 252.

[0138] In some embodiments, the clamping device connecting arrangement 3001 comprises a third connecting element 351 provided to the first chain tightening arrangement 31.

[0139] In some embodiments, the clamping device connecting arrangement 3001 comprises a fourth connecting element 352 provided to the second chain tightening arrangement 32.

[0140] In some embodiments, the first connecting element 251 and the third connecting element 351 are compatible, and the two or more separate machining devices 201,202 are arranged to be connected to the first chain tightening arrangement 31 with the first connecting element 251 and the third connecting element 351.

[0141] In some embodiments, the second connecting element 252 and the fourth connecting element 352 are compatible, and the two or more separate machining devices 201,202 are arranged to be connected to the second chain tightening arrangement 32 with the second connecting element 252 and the fourth connecting element 352.

[0142] In some embodiments, the machining system 1000 comprises a first securing part 1051 arranged to secure first connecting element 251 and the third connecting element 351 together.

[0143] In some embodiments, the machining system 1000 comprises a second securing part 1052 arranged to secure the second connecting element 252 and the fourth connecting element 352 together. In some embodiments, the first securing part 1051 comprises a cotter pin and a metal rod.

[0144] In some embodiments, the first securing part 1051 comprises a cotter pin and a metal rod, the metal rod comprises an opening in vicinity of one end of the metal rod and an extended diameter in the vicinity of another end.

[0145] In some embodiments, the second securing part 1052 comprises a cotter pin and a metal rod.

[0146] In some embodiments, the second securing part 1052 comprises a cotter pin and a metal rod, the metal rod comprises a cotter pin opening in vicinity of one end of the metal rod and an extended diameter in the vicinity of another end, the cotter pin opening is arranged to receive the cotter pin.

[0147] In some embodiments, the first connecting element 251 comprises a first securing opening arranged to receive the first securing part 1051 and the third connecting element 351 comprises a third securing opening arranged to receive the first securing part 1051, and the first securing part 1051 is arranged to secure the first connecting element 251 and the third connecting element 351 together.

[0148] In some embodiments, the second connecting element 252 comprises a second securing opening arranged to receive the second securing part 1052 and the fourth connecting element 352 comprises a fourth securing opening arranged to receive the second securing part 1052, and the second securing part 1052 is arranged to secure the second connecting element 252 and the fourth connecting element 352 together.

[0149] In other words, the second connecting element 252 and the fourth connecting element 352 are connected together with the second securing part 1052.

[0150] In some embodiments, the first securing part 1051 having a circular cross section and the second securing part 1052 having a circular cross section.

[0151] The circular cross section enables rotation between the first connecting element 251 and the third connecting element 351 and between the second connecting element 252 and the fourth connecting element 352.

[0152] In some embodiments, the machining set 200 comprises a machining device 201,202 comprising a hydraulic motor or pneumatic motor.

[0153] In some embodiments, at least one of the two or more separate machining devices 201,202 comprises a hydraulic motor.

[0154] In some embodiments, the two or more separate machining devices 201,202 comprises a hydraulic motor or a pneumatic motor.

[0155] A hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into torque and angular displacement (rotation).

[0156] A pneumatic motor is a mechanical actuator that converts pneumatic pressure and flow into torque and angular displacement (rotation).

[0157] A hydraulic motor and a pneumatic motor operate in wet conditions and under water.

[0158] The hydraulic motor operates with more compact power unit than the pneumatic motor and the hydraulic motor provides more torque than the pneumatic motor. In some embodiments, the cutting device 202 having a weight in the range of 5-20 kg or 5-15 kg or 8-12kg.

[0159] In some embodiments, the bevelling device 202 having a weight in the range of 5-20 kg or 5-15 kg or 8-12kg.

[0160] The light wight enables assembling and operating the cutting device 201 and the bevelling device 202.

[0161] The first chain tightening arrangement 31 having a weight in the range of 3-5 kg.

[0162] The second chain tightening arrangement 32 having a weight in the range of 3-5 kg.

[0163] The clamping chain 400 having a weight in the range of 1,5-3 kg / m.

[0164] The present invention further relates to a method for machining a tubular product 100 as shown in figure 11.

[0165] The method is carried out with the machining system 1000 comprising a machining set 200 and a clamping unit 300, the machining set 200 is arranged to be removably connectable with the clamping unit 300, the clamping unit 300 is arranged to be removably connectable with the tubular product 100:

[0166] - the method comprises:

[0167] - a step of positioning and supporting the clamping unit 300 on the tubular product 100;

[0168] - a step of cutting the tubular product 100 with the cutting device 202, the machining set 200 comprises a cutting device 202, and the cutting device 202 is connected with the clamping unit 300;

[0169] - a step of removing the cutting device 202 from the clamping unit 300 after the step of cutting the tubular product 100;

[0170] - the machining set 200 comprises a bevelling device 201, and the method comprises a step of connecting the bevelling device 201 with the clamping unit 300 after the step of removing the cutting device 202; and

[0171] - a step of bevelling an end of the tubular product 100 with the bevelling device 201 connected with the clamping unit 300.

[0172] In some embodiments, the step of positioning and supporting the clamping unit 300 on the tubular product 100 comprises positioning the clamping chain 400 around the tubular product 100 via the first chain tightening arrangement 31 and via the second chain tightening arrangement 32.

[0173] In some embodiments, the machining set 200 comprises a cutting device 202, the cutting device 202 being connected to the first chain tightening arrangement 31 and to the second chain tightening arrangement 32.

[0174] In some embodiments, the machining set 200 comprises a cutting device 202, the method comprises a step of connecting cutting device 202 to the first chain tightening arrangement 31 and to the second chain tightening arrangement 32.

[0175] In some embodiments, a step of cutting the tubular product 100 comprises cutting the tubular product 100 with the cutting device 202 by moving the cutting device 202, the first chain tightening arrangement 31 and the second chain tightening arrangement 32 the along the clamping chain 400.

[0176] In some embodiments, a step of removing the cutting device 202 from the clamping unit 300 comprises removing the cutting device 202 from the first chain tightening arrangement 31 and from the second chain tightening arrangement 32 after the step of cutting the tubular product 100.

[0177] In some embodiments, step of connecting the bevelling device 201 the machining set 200 comprises a bevelling device 201, and the method comprises a step of securing the bevelling device 201 to the first chain tightening arrangement 31 and to the second chain tightening arrangement 32 after the step of removing the cutting device 202.

[0178] In some embodiments, a step of bevelling an end of the tubular product 100 a step of bevelling the end of the tubular product 100 with the secured bevelling device 201 by moving the moving the bevelling device 201, the first tightening arrangement and the second chain tightening arrangement 32 along the clamping chain 400.

[0179] In some embodiments, the method comprises supporting the clamping chain 400 onto the tubular product 100 by tightening the clamping chain 400 with the first chain tightening arrangement 31 and the second chain tightening arrangement 32.

[0180] In some embodiments, the method comprises supporting the clamping chain 400 onto the tubular product 100 by moving a part of the clamping chain 400 in a direction away from the centre of the cross section of the tubular product 100 with the first chain tightening arrangement 31 and moving a part of the clamping chain 400 in a direction away from the centre of the cross section of the tubular product 100 with the second chain tightening arrangement 32.

[0181] In some embodiments, the method comprises supporting the clamping chain 400 onto the tubular product 100 by moving a part of the clamping chain 400 in a direction away from the centre of the cross section of the tubular product 100 with the first chain tightening arrangement 31 and moving another part of the clamping chain 400 in a direction away from the centre of the cross section of the tubular product 100 with the second chain tightening arrangement 32.

[0182] In some embodiments, the method comprises securing the cutting device 202 to the first chain tightening arrangement 31 and to the second chain tightening arrangement 32.

[0183] In some embodiments, the method comprises securing the bevelling device 201 to the first chain tightening arrangement 31 and to the second chain tightening arrangement 32.

[0184] In some embodiments, the clamping chain 40 having a first end of the clamping chain 400 and a second end of the clamping chain 400, and the method comprises connecting the first end of the clamping chain 400 and a second end of the clamping chain 400 together after the step of positioning the clamping chain 400 via the first chain tightening arrangement 31 and via the second chain tightening arrangement 32. In some embodiments, the clamping chain 400 comprises two or more clamping chain portions 401,402, and the method comprises connecting the two or more clamping chain portions 401,402 together.

[0185] That enables positioning the clamping chain 400 separately via the first chain tightening arrangement 31 and via the second chain tightening arrangement 32.

[0186] In some embodiments, the clamping chain 400 comprises two or more clamping chain portions 401,402, and the method comprises connecting the two or more clamping chain portions 401,402 together, and tightening the connected clamping chain 400 with the first chain tightening arrangement 31 and the second tightening arrangement 32.

[0187] That enables providing the clamping chain 400 around various sizes of tubular products 100.

[0188] In some embodiments, the method comprises a step of tightening the connected clamping chain 400 with the first chain tightening arrangement 31 and the second tightening arrangement 32.

[0189] In some embodiments, the cutting device 202 is secured and supported to the first chain tightening arrangement 31 and to the second chain tightening arrangement 32.

[0190] In some embodiments, the bevelling device 201 is secured and supported to the first chain tightening arrangement 31 and to the second chain tightening arrangement 32.

[0191] In some embodiments, the clamping chain 400 comprises one or more clamping chain portions.

[0192] In some embodiments, the clamping chain 400 comprises two or more clamping chain portions 401,402, and the method comprises connecting the two or more clamping chain portions 401,402 together.

[0193] In some embodiments, the clamping chain 400 comprises two or more clamping chain portions 401,402, and the method comprises connecting the two or more clamping chain portions 401,402 together, and tightening the connected clamping chain 400with the first chain tightening arrangement 31 and the second tightening arrangement 32.

[0194] In some embodiments, the method comprises a step of tightening the connected clamping chain 400 with the first chain tightening arrangement 31 and the second tightening arrangement 32.

[0195] In some embodiments, during the step of removing the cutting device 202, the first chain tightening arrangement 31, the second chain tightening arrangement 32 and the clamping chain 400 remaining on the tubular product 100.

[0196] In some embodiments, the clamping unit 300 remaining on the tubular product 100 during the step of removing the cutting device 202.

[0197] In some embodiments, the clamping unit 300 remaining on the tubular product 100 during the step of removing the cutting device 202, the clamping unit 300 comprises a first chain tightening arrangement 31, a second chain tightening arrangement 32 and a clamping chain 400. In some embodiments, the method being carried out with any above disclosed embodiment of a machining system 1000.

[0198] The invention has been explained above with reference to the aforementioned embodiments, and several advantages of the invention have been demonstrated. It is clear that the invention is not only restricted to these embodiments but comprises all possible embodiments within the spirit and scope of the inventive thought and the following patent claims. Especially it is to be noted that the apparatus is suitable for manipulating, such as especially machining, cutting, bevelling, grooving, welding or otherwise manipulating the tubular type pieces.

Claims

1. Claims1. A machining system (1000) arranged to machine a tubular product (100), characterized in that:- the machining system (1000) comprises a machining set (200) and a clamping unit (300),- the machining set (200) is arranged to be removably connectable with the clamping unit (300), and- the clamping unit (300) is arranged to be removably connectable with the tubular product (100).

2. A machining system (1000) according to claim 1, characterized in that:- the machining set (200) comprises two or more separate machining devices (201,202).

3. A machining system (1000) according to claim 1 or 2, characterized in that:- the machining set (200) comprises a cutting device (202) and a bevelling device (201), the cutting device (202) and the bevelling device (201) are arranged to be separately connected with the clamping unit (300); or- the two or more separate machining devices (201,202) include a cutting device (202) and a bevelling device (201), the cutting device (202) and the bevelling device (201) are arranged to be separately connectable with the clamping unit (300); or- the tubular product (100) having a longitudinal direction (L), the two or more separate machining devices (201,202) include a cutting device (202) and a bevelling device (201), the cutting device (202) and the bevelling device (201) are arranged to be separately connectable with the clamping unit (300), the cutting device (202) comprises a rotating cutting blade (2020) arranged to be rotated around a first blade axis (F), the first blade axis (F) is parallel to longitudinal direction (L) of the tubular product (100), and the bevelling device (201) comprises a rotating bevelling blade (2010) arranged to be rotated around a second blade axis (S), the second blade axis (S) is perpendicular to longitudinal direction (L) of the tubular product (100).

4. A machining system (1000) according to any of preceding claims, characterized in that:- at least one of the two or more separate machining devices (201,202) comprises a hydraulic motor or pneumatic motor.

5. A machining system (1000) according to any of preceding claims, characterized in that:- Each of the separate machining devices (201,202) is provided with a machining device connecting arrangement (2001), the chain clamping device (301) is provided with a clamping device connecting arrangement (3001), and themachining device connecting arrangement (2001) and the clamping device connecting arrangement (3001) are arranged to be removably connected.

6. A machining system (1000) according to any of preceding claims, characterized in that the chain clamping device (301) comprises:- a clamping chain (400) arranged to be positioned on a tubular product (100) to surround the tubular product (100);- a first chain tightening arrangement (31) and a second chain tightening arrangement (32) arranged to receive the clamping chain (400) and arranged to move the clamping chain (400) away from the tubular product (100) and towards the tubular product (100), the first chain tightening arrangement (31) and a second chain tightening arrangement (32) are arranged to be positioned on the tubular product (100); and- a moving arrangement (33) provided to the first chain tightening arrangement (31), the moving arrangement (33) is arranged to move the first chain tightening arrangement (31) along the clamping chain (400), and second chain tightening arrangement (31) and the machining set (200) are arranged to move together with the first chain tightening arrangement (31).

7. A machining system (1000) according to any of preceding claims, characterized in that:- the first chain tightening arrangement (31) comprises a first adjusting chain wheel (3311), the first adjusting chain wheel (3311) is arranged to be positioned in contact with the clamping chain (400), and the first adjusting chain wheel (3311) is arranged to move the clamping chain (400) away and towards the tubular product (100), at least a part of the first adjusting chain wheel (3311) is arranged to be positioned between the clamping chain (400) and the tubular product (100); and- the second chain tightening arrangement (32) comprises a second adjusting chain wheel (3321), the second adjusting chain wheel (3321) is arranged to be positioned in contact with the clamping chain (400), and the second adjusting chain wheel (3321) is arranged to move the clamping chain (400) away and towards the tubular product (100), at least a part of the second adjusting chain wheel (3321) is arranged to be positioned between the clamping chain (400) and the tubular product (100).

8. A machining system (1000) according to any of preceding claims, characterized in that:- the first chain tightening arrangement (31) comprises a first tightening arrangement body (312), a first axis (311), a second axis (313), a first supporting roll (3111) and a second supporting roll (3112), a third supporting roll (3113) and a fourth supporting roll (3114);- the first axis (311) is provided with a first axis chain wheel (314) and the second axis (313) is provided with a second axis chain wheel (315);- the first axis (311) extending from the first supporting roll (3111) to the second supporting roll (3112), the first axis (311) is rotatably connected to the first tightening arrangement body (312),- the second axis (313) extending from the third supporting roll (3113) to the fourth supporting roll (3114), the second axis (313) is rotatably connected to the first tightening arrangement body (312);- the first, second, third and fourth supporting rolls (3111, 3112, 3113,3114) are arranged to be rolled around the tubular product (100),- the first axis chain wheel (314) and the second axis chain wheel (315) are compatible with the clamping chain (400),- the first axis chain wheel (314) is provided between the first supporting roll (3111) and the second supporting roll (3112),- the second axis (313) is provided with a second axis chain wheel (315), the second axis chain wheel (315) is provided between the third supporting roll (3113) and the fourth supporting roll (3114), and- the first axis chain wheel (314) and the second axis chain wheel (315) are arranged to be rolled along the clamping chain (400); and- a moving arrangement (33) is provided to the first chain tightening arrangement (31), the moving arrangement (33) comprises a rotating mechanism (3200) arranged to rotate the first axis chain wheel (314).

9. A machining system (1000) according to any of preceding claims, characterized in that:- the second chain tightening arrangement (32) comprises a second tightening arrangement body (322), a third axis (321), a fourth axis (323), a fifth supporting roll (3211), a sixth supporting roll (3212), a seventh supporting roll (3213) and an eighth supporting roll (3214);- the third axis (321) is provided with a third axis (321) chain wheel and the fourth axis (323) is provided with a fourth axis (323) chain wheel;- the third axis (321) extending from the fifth supporting roll (3211) to the sixth supporting roll (3212), the third axis (321) is rotatably connected to the second tightening arrangement body (322),- the fourth axis (323) extending from the seventh supporting roll (3213) to the eighth supporting roll, the fourth axis (323) is rotatably connected to the second tightening arrangement body (322);- the fifth, sixth, seventh and eighth supporting rolls (3211, 3212, 3213, 3214) are arranged to be rolled around the tubular product (100),- the third axis chain wheel (324) and the fourth axis chain wheel (325) are compatible with the clamping chain (400),- the third axis chain wheel (324) is provided between the fifth supporting roll (3211) and the sixth supporting roll (3212),- the fourth axis (323) is provided with a fourth axis chain wheel (325), the fourth axis chain wheel (325) between the seventh supporting roll (3213) and the eighth supporting roll (3214), and- the third axis chain wheel (324) and the fourth axis chain wheel (325) are arranged to be rolled along the clamping chain (400).

10. A machining system (1000) according to any of preceding claims, characterized in that:- at least a part of the two or more separate machining devices (201,202) is arranged to be positioned between the first chain tightening arrangement (31) and the second chain tightening arrangement (32),- the machining device connecting arrangement (2001) comprises a first connecting element (251) and a second connecting element (252),- the clamping device connecting arrangement (3001) comprises a third connecting element (351) provided to the first chain tightening arrangement (31),- the clamping device connecting arrangement (3001) comprises a fourth connecting element (352) provided to the second chain tightening arrangement (32),- the first connecting element (251) and the third connecting element (351) are compatible, and the two or more separate machining devices (201,202) are arranged to be connected to the first chain tightening arrangement (31) with the first connecting element (251) and the third connecting element (351); and- the second connecting element (252) and the fourth connecting element (352) are compatible, and the two or more separate machining devices (201,202) are arranged to be connected to the second chain tightening arrangement (32) with the second connecting element (252) and the fourth connecting element (352).

11. A machining system (1000) according to any of preceding claims, characterized in that:- the machining system (1000) comprises a first securing part (1051) arranged to secure first connecting element (251) and the third connecting element (351) together; and- the machining system (1000) comprises a second securing part (1052) arranged to secure second connecting element (252) and the fourth connecting element (352) together.

12. Method for machining a tubular product (100), characterized in that:- the method is carried out with the machining system (1000) comprising a machining set (200) and a clamping unit (300), the machining set (200) is arranged to be removably connectable with the clamping unit (300), the clamping unit (300) is arranged to be removably connectable with the tubular product (100):- the method comprises:- a step of positioning and supporting the clamping unit (300) on the tubular product (100);- a step of cutting the tubular product (100) with the cutting device (202), the machining set (200) comprises a cutting device (202), and the cutting device (202) is connected with the clamping unit (300);- a step of removing the cutting device (202) from the clamping unit (300) after the step of cutting the tubular product (100);- the machining set (200) comprises a bevelling device (201), and the method comprises a step of connecting the bevelling device (201) with the clamping unit (300) after the step of removing the cutting device (202); and- a step of bevelling an end of the tubular product (100) with the bevelling device (201) connected with the clamping unit (300).

13. Method according to claim 12, characterized in that:- the clamping chain (400) having a first end of the clamping chain (400) and a second end of the clamping chain (400), and the method comprises connecting the first end of the clamping chain (400) and a second end of the clamping chain (400) together after the step of positioning the clamping chain (400) via the first chain tightening arrangement (31) and via the second chain tightening arrangement (32); or- the clamping chain (400) comprises two or more clamping chain portions (401,402), and the method comprises connecting the two or more clamping chain portions (401,402) together; or- the clamping chain (400) comprises two or more clamping chain portions (401,402), and the method comprises connecting the two or more clamping chain portions (401,402) together, and tightening the connected clamping chain (400) with the first chain tightening arrangement (31) and the second tightening arrangement (32); or- the method comprises a step of tightening the connected clamping chain (400) with the first chain tightening arrangement (31) and the second tightening arrangement (32).

14. Method according to claim 12 or 13, characterized in that:- the clamping unit (300) remaining on the tubular product (100) during the step of removing the cutting device (202); or- the clamping unit (300) remaining on the tubular product (100) during the step of removing the cutting device (202), the clamping unit (300) comprises a first chain tightening arrangement (31), a second chain tightening arrangement (32) and a clamping chain (400).

15. Method according to any one of claims 12 to 14, characterized in that:- the method being carried out with a machining system (1000) according to any one of claims 1 to 11.

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