Conveyor Machine

Abstract

The invention relates to a conveying machine (1) for cold plastic deformation and / or chip removal of at least one tubular profile. The conveying machine comprises a base (11), a mounting table (12), a turntable (13) and a plurality of electromechanical working units (2; 3; 4; 5). The electromechanical working units (2; 3; 4; 5) are mounted on the mounting table (12). Each electromechanical working unit (2; 3; 4; 5) comprises a first propulsion group (21; 31; 41; 51), which in turn comprises a first propulsion motor (22; 32; 42; 52), a first propulsion recirculation ball screw (23; 33; 43; 53), a first propulsion nut (24; 34; 44; 54) and a first tubular rod (25; 35; 45; 55). The recirculation ball screw (23; 33; 43; 53) is moved by the first propulsion motor. The first advancing nut (24; 34; 44; 54) is engaged with the first advancing recirculating ball screw. The first tubular rod is engaged with the first advancing nut and is integral therewith and defines the advancement and / or positioning of the first tool holder element (36; 46; 56).

Description

Technical Field

[0001] The present invention relates to the field of conveying machines; in particular, the present invention relates to a conveying machine for cold plastic deformation and / or chip removal of at least one tubular profile. Such processed tubular profiles are subsequently intended for use in the technical automotive field or in the thermohydraulic field. Background Art

[0002] Transfer machines for cold forming tubular profiles using pneumatic or fluid-powered working units are known in the prior art. In fact, prior art transfer machines obtain the thrust required for cold plastic deformation of tubular profiles with variable diameter and thickness by using pneumatic or fluid-powered actuators.

[0003] Transfer machines using hybrid actuation working units (i.e. partly electromechanical and partly pneumatic / fluidic) are also known. Such transfer machines require replacing the electromechanical actuator with at least one pneumatic and / or fluidic actuator capable of generating sufficient thrust to deform the tubular profile during the deformation process.

[0004] Regardless of whether the conveying machine is actuated entirely by actuators supplied with pressurized fluid or has a hybrid actuation integrating electromechanical and pneumatic / fluid-powered actuators, in both cases a supply circuit for the pressurized fluid still needs to exist.

[0005] It is known that the presence of conduits or supply circuits for supplying pressurized fluid complicates the design and assembly of the transfer machine. An example of a transfer machine for machining according to the prior art is described in WO 2018 / 172952 A1.

[0006] Disadvantageously, the conveying machine including the circuit for the pressurized fluid is not only complex but also dangerous. In fact, the mechanical parts conveying the pressurized fluid require high safety standards, constant monitoring and frequent maintenance. Compliance with these safety standards will lead to high costs to ensure the correct and safe operation of the conveying machine. Summary of the invention

[0007] The object of the present invention is to propose a transfer machine for cold plastic deformation and / or chip removal processes which is able to at least partially avoid the above-mentioned disadvantages associated with transfer machines according to the prior art.

[0008] The object is achieved by the transfer machine according to the invention for cold plastic deformation and / or chip removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The characteristics and advantages of the conveying machine according to the invention will become apparent from the following description which shows a preferred embodiment by way of indicative, non-limiting example, with reference to the accompanying drawings in which:

[0010] - Figure 1 shows a perspective view of a conveying machine according to the present invention;

[0011] - Figure 2 Shows Figure 1 Another perspective view of the conveyor machine;

[0012] - Figure 3 An electromechanical working unit according to another embodiment is shown;

[0013] - Figure 4 An electromechanical working unit according to another embodiment is shown;

[0014] - Figure 5 shows an electromechanical working unit according to yet another embodiment, and

[0015] - Figure 6 An electromechanical working unit according to another embodiment is shown. DETAILED DESCRIPTION

[0016] In said figures, a conveying machine according to the invention is indicated as a whole by the reference numeral 1 .

[0017] In the overall embodiment, a conveying machine 1 for cold plastic deformation and / or chip removal of at least one tubular profile is proposed. This conveying machine comprises a base 11, a mounting table 12, a turntable 13 and a plurality of electromechanical working units 2; 3; 4; 5. The base 11 allows resting on a base surface B. The mounting table 12 is fixed and arranged orthogonal to the base surface B. The turntable 13 faces the mounting table. The electromechanical working units 2; 3; 4; 5 are mounted on the mounting table 12.

[0018] The turntable 13 comprises a plurality of workstations 131 , wherein each of the plurality of workstations comprises a vise 132 for clamping a tubular profile.

[0019] According to one embodiment, the vise 132 includes a pair of half jaws, wherein a first jaw half of the pair is fixed and a second jaw half is movable.

[0020] Advantageously, the movable half-jaws are adapted to possible variations in the diameter of the tubular profile to be processed, making the transfer machine flexible with respect to various types of tubular profiles.

[0021] According to one aspect of the present invention, a plurality of housing seats 121 are formed in the mounting table 12, and each housing seat in such a plurality of housing seats 121 faces a respective workstation. Each housing seat is further adapted to accommodate one of the plurality of electromechanical working units.

[0022] Each electromechanical working unit 2;3;4;5 comprises a first propulsion group 21;31;41;51. Such a first propulsion group in turn comprises a first propulsion motor 22;32;42;52, a first propulsion recirculation ball screw 23;33;43;53, a first propulsion nut 24;34;44;54 and a first tubular rod 25;35;45;55.

[0023] According to one embodiment, the first propulsion motor 22; 32; 42; 52 is electric.

[0024] According to one aspect of the invention, the first advancement recirculation ball screw 23; 33; 43; 53 is moved by a first advancement motor and extends along a first advancement screw axis V' that is substantially orthogonal to the mounting table 12. The first advancement nut 24; 34; 44; 54 is engaged with the first advancement recirculation ball screw and can be translated along the first advancement screw axis V'. The first tubular rod 25; 35; 45; 55 extends between a first rod proximal end 25'; 35'; 45'; 55' and a first rod distal end 25"; 35"; 45"; 55". The first rod proximal end is engaged to and integral with the first advancement nut, while the first rod distal end is suitable for limiting the advancement and / or positioning of the first tool holder element 36; 46; 56.

[0025] In this discussion, the term "proximal" refers to an element that is close to or extends toward the universal motor member. In contrast, the term "distal" refers to an element that is away from or at a distance from the universal motor member.

[0026] According to one embodiment, at least one tubular profile is made of a material belonging to the family of steel or aluminium alloys.

[0027] According to the attached Figure 3 , Attachment Figure 4 and attached Figure 6 In the illustrated embodiment, the first propulsion motor 22;32;52, the first propulsion recirculation ball screw 23;33;53, the first propulsion nut 24;34;54 and the first tubular rod 25;35;55 are coaxial.

[0028] according to Figure 3 In the embodiment shown, the electromechanical working unit 2 has a maximum linear travel of 150 mm.

[0029] According to the attached Figure 4 and attached Figure 5In the illustrated embodiment, at least one electromechanical working unit 3; 4 further comprises a rotating group 311; 411. The rotating group 311; 411 comprises a rotating motor 321; 421, a first tool holder element 36; 46 and a rotating motion transmission system 323; 423. The rotating motor 321; 421 further comprises a rotating motor shaft 322; 422, which extends along a rotating motor axis M" parallel to the first advancement screw axis V'. The first tool holder element 36; 46 is provided with a tool holder element hub 327; 427. The rotating motion transmission system 323; 423 comprises a transmission device suitable for connecting the rotating motor 321; 421 to the tool holder element hub 327; 427. In particular, the tool holder element hub 327; 427 limits the rotation of the first tool holder element 36; 46 around a tool holder element rotation axis R, which is parallel or coaxial with the first advancement screw axis V'.

[0030] According to the attached Figure 4 and attached Figure 5 , the transmission device includes a rotary drive pulley 324; 424, a rotary driven pulley 325; 425 and a rotary transmission belt 326; 426. The rotary drive pulley 324; 424 is engaged to the rotary drive shaft 322; 422. The rotary transmission belt 326; 426 allows the rotary motion to be transmitted from the rotary drive pulley 324; 424 to the rotary driven pulley 325; 425. In detail, the tool holder element hub 327; 427 is engaged to the rotary driven pulley 325; 425 and is integral with the rotary driven pulley.

[0031] according to Figure 4 In the embodiment shown, the electromechanical working unit 3 is adapted to generate a rotational translational movement. In particular, the first thrust motor 32 generates an axial thrust movement with a maximum stroke of 150 mm, while the rotary motor 321 limits the rotation of the first tool holder element 36. The tool holder element hub 327 is further keyed to the first tool holder element 36 to limit the rotation of the first tool holder element 36 around the tool holder element rotation axis R.

[0032] According to one embodiment, the first tubular rod 35 includes a first rod first portion and a first rod second portion. The first rod first portion extends from the first rod proximal end 35' and the first rod second portion terminates at the first rod distal end 35". The cross-sectional dimensions of the first rod first portion are different from the cross-sectional dimensions of the second rod second portion. In addition, the first rod first portion is connected to the first rod second portion via a rod connecting flange.

[0033] according to Figure 5In the embodiment shown, the electromechanical working unit 4 is adapted to generate a rotational-translational movement. In particular, the first advancing motor 42 generates an axial position movement with a maximum stroke of 100 mm, while the rotary motor 421 limits the rotation of the first tool holder element 46. The tool holder element hub 427 is further keyed to the first tool holder element 46 to limit the rotation of the first tool holder element 46 around the tool holder element rotation axis R.

[0034] according to Figure 6 In the illustrated embodiment, at least one electromechanical working unit 5 further comprises a second propulsion group 511 , which comprises a second propulsion motor 521 , a second propulsion recirculation ball screw 531 , a second propulsion nut 541 , a second propulsion flange 542 and a second tubular rod 551 .

[0035] The second propulsion recirculation ball screw 531 extends along a second propulsion screw axis V" parallel to the first propulsion screw axis V'. In addition, such a second propulsion recirculation ball screw is moved by a second propulsion motor 521. The second propulsion nut 541 is engaged with the second propulsion recirculation ball screw 531 and can translate along the second propulsion screw axis V". The second propulsion flange 542 is engaged to the second propulsion nut 541 and is integral with the second propulsion nut. The second tubular rod 551 extends between the second rod proximal end 551' and the second rod distal end 551". The proximal end of the second rod is engaged to the second propulsion flange 542 and is integral with the second propulsion flange, while the distal end of the second rod is suitable for limiting the propulsion and / or positioning of the second tool holder element. In particular, the second tubular rod 551 is coaxial with the first tubular rod 55.

[0036] Figure 6 The electromechanical working unit 5 shown is suitable for generating two independent axial movements. In detail, the first axial thrust movement is generated by means of the first tubular rod 55, and the second axial thrust movement is generated by means of the second tubular rod 551. It is worth noting that the execution order of the two axial movements is reversible, that is, the thrust of the first tubular rod 55 can precede the thrust of the second tubular rod 551, and vice versa.

[0037] according to Figure 6 In the embodiment shown, the electromechanical working unit 5 is adapted to generate two independent axial movements to perform two different deformation processes on the tubular profile, for example, external deformation and internal deformation of the tubular profile. In detail, the stroke of the first tubular rod 55 and / or the second tubular rod 551 varies from a minimum of 49 mm to a maximum of 160 mm.

[0038] According to one embodiment, the first push nut 24; 34; 44; 54 is basically a hollow cylinder extending between the proximal end 24'; 34'; 44'; 54' of the push nut and the distal end 24"; 34"; 44"; 54" of the first push nut. The first push nut 24; 34; 44; 54 is further provided with a first bushing 240; 340; 440; 540, which protrudes radially outward and is formed at the proximal end ( Figure 3 and Figure 5 ) or the distal end of the first push nut ( Figure 4 and Figure 6 In other words, when the first bushing protrudes from the distal end of the first push nut, the first push nut is basically installed in reverse.

[0039] Advantageously, when the first driving nut is mounted upside down, the axial dimension of the electromechanical working unit can be reduced.

[0040] In addition, the first bushing 240;340;440;540 defines an engagement surface for the first rod proximal end 25' or for the first advancement flange 350;450;550, which is engaged to and integral with both the first advancement nut 24;34;44;54 and the first rod proximal end 35';45';55'.

[0041] according to Figure 4 and Figure 6 In the illustrated embodiment, the first thrust flange 350; 550 is axially symmetrical. In particular, the first flange hole 3500; 5500 is engaged with the first thrust recirculation ball screw 33; 53 and is formed centrally in the first thrust flange 350; 550. The first flange hole 3500; 5500 includes a stepped chamfer 3501; 5501, which is suitable for engaging the first thrust flange 350; 550 to the first thrust nut 34; 54 and integrating the first thrust flange with the first thrust nut. The first thrust flange 350; 550 is further defined by a first flange peripheral area 3502; 5502, which is suitable for engaging the first thrust flange 350; 550 to the first rod proximal end 35'; 55' and integrating the first thrust flange with the first rod proximal end.

[0042] According to one embodiment, a first tool holder seat 25 ″; 35 ″; 45 ″ is present at the first rod distal end 260 ; 360 ; 460 .

[0043] According to the attached Figure 3 The first tool holder seat 260 is suitable for accommodating a plastic deformation unit or a chip removal unit. For example, the plastic deformation unit is a rolling unit, or a pressing head, rounding or facing unit.

[0044] According to the attached Figure 4 and attached Figure 5 , the first tool holder seat 360; 460 is adapted to accommodate a first tool holder element 36; 46. Such a first tool holder element 36; 46 is suitable for being removably equipped with at least one tool for cold plastic deformation of a tubular profile or for chip removal.

[0045] according to Figure 4 and Figure 5 In the embodiment shown, the first tool holder element 36; 46 is a shaft in which a tool seat 361; 461 is centrally formed, suitable for accommodating a shaping unit or a chip removal unit.

[0046] according to Figure 6 In an embodiment of the invention, the first tool holder element 56 forms a releasable coupling device 561, such as a form coupling, by means of an interference or screw connection deformation unit.

[0047] according to Figure 6 In the illustrated embodiment, the first rod distal end 55″ is joined to the push-on flange tool holder element 543 and is integral with the push-on flange tool holder element. A blind tool holder element 5430 that accommodates the first tool holder element 56 is present in the push-on flange of the tool holder element 543.

[0048] Advantageously, the tool element seat 5430 facilitates centering of the first tool element 56 relative to the tool holder element advancement flange 543 .

[0049] The tool holder element advancement flange 543 is further integral with the first tool holder element 56 and is provided with a centering tang 5431 which protrudes proximally along the first advancement screw axis V' towards the first advancement motor 52. Said centering tang 5431 is at least partially accommodated in a recess 530 present in the first advancement recirculation ball screw 53. Said recess 530 is circumferentially bounded by a recess wall and the centering tang 5431 never contacts said recess wall. In other words, the recess 530 is only a notch for accommodating the centering tang 5431 and there is no contact between the centering tang 5431 and the recess wall.

[0050] according to Figure 6 In the illustrated embodiment, the second propel motor 521 is coupled to the second propel recirculation ball screw 531 via a bellows coupling 571 .

[0051] Advantageously, the bellows joint allows correction of possible misalignments between the second propulsion motor and the second propulsion recirculation ball screw.Thus, the bellows joint facilitates assembly of the electromechanical working unit.

[0052] According to a further advantageous aspect, the bellows joint improves the torsion resistance at the interface between the second propulsion motor and the second propulsion recirculation ball screw.

[0053] According to the attached Figure 6 The second advancement nut 541 is provided with a second bushing 5410 , which is suitable for engaging the second advancement nut 541 and making the second advancement nut and the second advancement flange 542 integral.

[0054] according to Figure 6 In the embodiment shown, a second tool holder seat 560 suitable for receiving a second tool holder element is present at the distal end 551 ″ of the second rod. Such a second tool holder element is removably equipped with at least one tool for plastic deformation or chip removal of the tubular profile.

[0055] according to Figure 5 In the embodiment shown, the conveying machine further includes a first rotary motion transmission system 413. Such a first rotary motion transmission system 413 includes a first rotary drive pulley 414, a first rotary driven pulley 415 and a first rotary transmission belt 416. The first rotary drive pulley 414 is engaged with the first rotary drive shaft 411 of the first propulsion motor 42. The first rotary transmission belt 416 transmits motion from the first rotary drive pulley 414 to the first rotary driven pulley 415. In addition, the first rotary driven pulley 415 is engaged with the first propulsion recirculation ball screw 43 and is integrally formed with the first propulsion recirculation ball screw. The first rotary drive shaft 411 extends along the first propulsion motor axis M' parallel to or coincident with the first propulsion screw axis V'.

[0056] According to the attached Figure 4 In the illustrated embodiment, the first tool holder element 36 is provided with a first centering handle 3431 which protrudes proximally along the first advancement screw axis V' toward the first advancement motor 32. The first centering handle 3431 is at least partially accommodated in a first recess 330 present in the first advancement recirculation ball screw 33. The first recess 330 is circumferentially bounded by a first recess wall and the first centering handle 3431 never contacts the first recess wall. In other words, the first recess 330 is only a notch for accommodating the first centering handle 3431 and there is no contact between the first centering handle 3431 and the first recess wall.

[0057] According to one embodiment, each electromechanical working unit 2; 3; 4; 5 comprises an outer covering frame 200; 300; 400; 500 made of anodized aluminum (e.g., 7000 series aluminum). In particular, the outer covering frame is made of hard anodized aluminum. The hard anodizing process makes it possible to obtain a hardened surface layer with a depth between 20 and 35 microns.

[0058] Advantageously, the outer covering frame made of aluminium allows obtaining an electromechanical working unit which is light enough to be mounted cantilevered in the housing of the mounting table.

[0059] According to a further advantageous aspect, the outer covering frame made of anodised aluminium allows a good compromise to be obtained between surface hardness and lightness.

[0060] According to the attached Figure 3 , Attachment Figure 4 and attached Figure 6 In the illustrated embodiment, the first propulsion motor 22; 32; 52 is a hollow shaft motor.

[0061] According to one embodiment, each electromechanical working unit 2; 3; 4; 5 includes an external covering frame 200; 300; 400; 500 extending between a proximal frame portion 200'; 300'; 400'; 500' and a distal frame portion 200"; 300"; 400"; 500". The distal frame portion 200"; 300"; 400"; 500" includes an external cylindrical surface 201; 301; 401; 501, which is defined at the proximal end by a shoulder 210; 310; 410; 510 or a spacer and at the distal end by a locking ring nut 220; 320; 420; 520. The spatial area extending between the shoulder 210; 310; 410; 510 or the spacer and the locking ring nut 220; 320; 420; 520 is adapted to be received in one of the plurality of receiving seats 121 of the mounting table 12. In particular, the locking ring nut 220; 320; 420; 520 is screwed onto the outer cylindrical surface 201; 301; 401; 501 until it comes into contact with the surface of the mounting table 12 that faces the turntable 13. Conversely, the shoulder 210; 310; 410; 510 abuts against the surface of the mounting table 12 that is opposite to the surface that faces the turntable 13. In this way, each electromechanical working unit is mounted and locked in one of the plurality of housing seats 121.

[0062] Innovatively, the conveying machine according to the invention meets the intended purpose; in fact, it comprises completely electromechanical working units that are not adversely affected by the presence of the above-mentioned pneumatic or fluid-dynamic actuators. In other words, the conveying machine according to the invention is suitable for plastically deforming tubular profiles by electromechanically actuated working units, without the need for pneumatic or fluid-dynamically actuated actuators. The forces generated by the electromechanical working units are sufficient to eliminate the presence of pressurized fluids and corresponding control units.

[0063] Furthermore, the transfer machine is safe since it comprises only an electromechanical working unit capable of generating sufficient thrust to deform the tubular profile. In other words, the electromechanical working unit does not require the additional presence of pneumatic / fluidic actuators or, in any case, components subjected to the action of pressurized fluids.

[0064] The second advantage is that the transfer machine allows a reduction in costs, since the working unit is completely electromechanical. The structure of the transfer machine is simplified, since the electromechanical working unit is not equipped with an oil or fluid pressure tank, a control unit or an oil / fluid recovery system. A further reduction in costs can be attributed to the fact that by using an electromechanical working unit, there is no need to deal with the waste oil generated, and the transfer machine requires less monitoring and maintenance than a fully pneumatically or fluid-powered transfer machine.

[0065] In a further advantageous aspect, the electromechanical working unit is adapted to generate a deformation thrust of up to 7000 kg.

[0066] A person skilled in the art may make changes and adjustments to the embodiments of the conveying machine according to the invention without departing from the scope of protection of the appended claims, or may replace elements with other functionally equivalent elements to meet possible needs. All the features described above belonging to one possible embodiment may be implemented independently of the other described embodiments.

Claims

1. A transfer machine (1) for cold plastic deformation and / or chip removal of at least one tubular profile, comprising: - a base (11) for resting on a base surface (B); - a mounting table (12), fixed and arranged orthogonally to the base surface (B); - a turntable (13), facing the mounting table, and - a plurality of electromechanical working units (2; 3; 4; 5), mounted on the mounting table (12), The turntable (13) comprises a plurality of workstations (131), wherein each of the plurality of workstations comprises a vise (132) for clamping the tubular profile, a plurality of housing seats (121) are formed in the mounting table (12), wherein each of the plurality of housing seats (121) faces a corresponding workstation and is suitable for accommodating one of the plurality of electromechanical working units, each of the electromechanical working units (2; 3; 4; 5) comprises a first propulsion group (21; 31; 41; 51), wherein the first propulsion group comprises: - a first propulsion motor (22; 32; 42; 52), wherein the first propulsion motor (22; 32; 42; 52) is electric; - a first advance recirculation ball screw (23; 33; 43; 53), moved by said first advance motor and extending along a first advance screw axis (V') substantially orthogonal to said mounting table (12); - a first advancement nut (24; 34; 44; 54) engaged with said first advancement recirculation ball screw and capable of translation along said first advancement screw axis (V'), and - a first tubular rod (25; 35; 45; 55), at a first rod proximal end (25'; 35'; 45'; 55') and a first rod distal end (25"; 35"; 45"); 55”), the proximal end of the first rod being engaged to and integral with the first advancement nut, the distal end of the first rod being adapted to define advancement and / or positioning of a first tool holder element (36; 46; 56), Characterized in that the first propulsion motor (22; 32; 52) is a hollow shaft motor, and Each of the electromechanical working units (2; 3; 4; 5) comprises an external covering frame (200; 300; 400; 500) made of anodized aluminum, which allows obtaining an electromechanical working unit that is light enough to be cantilevered in the housing seat (121) of the mounting table.

2. The conveying machine (1) according to claim 1, wherein: The first propulsion motor (22; 32; 52), the first advancing recirculating ball screw (23; 33; 53), the first advancing nut (24; 34; 54) and the first tubular rod (25; 35; 55) are coaxial.

3. A conveying machine (1) according to claim 1 or 2, wherein: At least one of the electromechanical working units (3; 4) further comprises a rotating group (311; 411), the rotating group comprising: - a rotary motor (321; 421) comprising a rotary motor shaft (322; 422) extending along a rotary motor axis (M") parallel to the first advancement screw axis (V'); - a first tool holder element (36; 46) provided with a tool holder element hub (327; 427), and - A rotational motion transmission system (323; 423), comprising a transmission device, suitable for connecting the rotary motor (321; 421) to the tool holder element hub (327; 427), wherein the tool holder element hub (327; 427) limits the rotation of the first tool holder element (36; 46) around a tool holder element rotation axis (R) parallel to or coaxial with the first advance screw axis (V').

4. The conveying machine according to claim 3, wherein: The transmission device comprises a rotating driving pulley (324; 424), a rotating driven pulley (325; 425) and a rotating transmission belt (326; 426), the rotary drive pulley is coupled to the rotary motor shaft (322; 422), the rotary transmission belt is used to transmit the rotary motion from the rotary drive pulley (324; 424) to the rotary driven pulley (325; 425), The tool holder element hub (327; 427) is connected to the rotation driven pulley (325; 425) is engaged with and integral with the rotating driven pulley.

5. The conveying machine (1) according to claim 1, wherein: At least one of the electromechanical working units (5) further comprises a second propulsion group (511), the second propulsion group comprising: - a second propulsion motor (521); - a second thrust recirculation ball screw (531) extending along a second thrust screw axis (V") parallel to the first thrust screw axis (V'), the second thrust recirculation ball screw being further moved by the second thrust motor (521); - a second advancement nut (541) engaged with the second advancement recirculation ball screw (531) and capable of translation along the axis (V") of the second advancement screw; - a second driving flange (542) engaged with said second driving nut (541) and integral therewith, and - A second tubular rod (551), extending between a second rod proximal end (551') and a second rod distal end (551"), the second rod proximal end being joined to and integral with the second thrust flange (542), the second rod distal end being suitable for limiting the thrust and / or positioning of the second tool holder element, the second tubular rod (551) being further coaxial with the first tubular rod (55).

6. The conveying machine (1) according to claim 1, wherein: The first advancing nut (24; 34; 44; 54) is substantially at the proximal end of the first push nut (24'; 34'; 44'; 54') and a first push nut distal end (24"; 34"; 44"; 54"), the first push nut (24; 34; 44; 54) is further provided with a first bushing (240; 340; 340) protruding radially outward and existing at the proximal end of the first push nut or at the distal end of the distal end of the first push nut. 440; 540), the first bushing (240; 340; 440; 540) defines an engagement surface for the proximal end (25') of the first rod member or for a first thrust flange (350; 450; 550), the engagement surface being engaged to and integral with both the first thrust nut (24; 34; 44; 54) and the proximal end (35'; 45'; 55') of the first rod member.

7. The conveying machine (1) according to claim 6, wherein: The first thrust flange (350; 550) is axially symmetrical and a first flange hole (3500; 5500) centrally located in the first thrust flange (350; 550) engages the first thrust recirculation ball screw (33; 53), the first flange hole (3500; 5500) including a stepped chamfer (3501; 5501) for engaging the first thrust flange (350; 550) to the first thrust nut (34; 54) and making the first thrust flange and the first thrust nut integral, the first thrust flange (350; 550) being further defined by a first flange peripheral area (3502; 5502) to engage the first thrust flange (350; 550) and make the first thrust flange and the proximal end (35'; 55') of the first rod member integral.

8. The conveying machine (1) according to claim 1, wherein: First tool holder seat (260; 360; 460) is present at the distal end (25"; 35"; 45") of the first rod, The first tool holder seat (260) is adapted to accommodate a plastic deformation unit or a chip removal unit, or The first tool holder seat (360; 460) is adapted to receive the first tool holder element (36; 46).

9. The conveying machine (1) according to claim 1, wherein: The first tool holder element (36; 46) is a shaft in which a tool seat (361; 461) is centrally located to accommodate a deformation unit or a chip removal unit, or the first tool holder element (56) forms a releasable coupling device (561) by interfering or bolting the deformation unit.

10. The conveying machine (1) according to claim 1, wherein: The distal end (55") of the first rod is engaged to the tool holder element advancing flange (543) and is integrated with the tool holder element advancing flange, and a blind tool holder element (5430) for accommodating the first tool holder element (56) is present in the tool holder element advancing flange, and the tool holder element advancing flange (543) is integrated with the first tool holder element (56) and is provided with a centering handle (5431), which protrudes proximally along the first advance screw axis (V') toward the first advance motor (52), and the centering handle (5431) is at least partially accommodated in a recess (530) present in the first advance recirculation ball screw (53).

11. The conveying machine (1) according to claim 5, wherein: The second propel motor (521) is coupled to the second propel recirculation ball screw (531) via a bellows coupling (571).

12. The conveying machine (1) according to claim 5, wherein: The second advancement nut (541) is provided with a second bushing (5410) to engage the second advancement nut (541) and make the second advancement nut integral with the second advancement flange (542).

13. The conveying machine (1) according to claim 5, wherein: A second tool holder seat (560) is present at the distal end (551") of the second rod, the second tool holder seat being adapted to accommodate the second tool holder element which is removably provided with at least one tool for plastically deforming or chip removal of the tubular profile.

14. The conveying machine (1) according to claim 1 further includes a first rotational motion transmission system (413), the first rotational motion transmission system includes a first rotational drive pulley (414), a first rotational driven pulley (415) and a first rotational transmission belt (416), the first rotational drive pulley is coupled to the first rotational drive shaft of the first propulsion motor (42), the first rotational transmission belt is used to transfer motion from the first rotational drive pulley (414) to the first rotational driven pulley (415), the first rotational driven pulley (415) is coupled to the first propulsion recirculation ball screw (43) and is integrated with the first propulsion recirculation ball screw, and the first rotational drive shaft extends along the first propulsion motor axis (M') parallel to or coincident with the first propulsion screw axis (V').

15. The conveying machine (1) according to claim 3, wherein: The first tool holder element (36) is provided with a first centering handle (3431), which protrudes proximally along the first advancement screw axis (V') toward the first advancement motor (32), and the first centering handle (3431) is at least partially accommodated in a first recess (330) present in the first advancement recirculation ball screw (33).

16. The conveying machine (1) according to claim 1, wherein: The outer covering frame (200; 300; 400; 500) at the proximal frame portion (200'; 300'; 400'; 500') and a distal framework portion (200"; 300"; 400"; 500"), the distal framework portion (200"; 300"; 400"; 500") comprising an outer cylindrical surface (201; 301; 401； 501), the outer cylindrical surface is defined at the proximal end by a shoulder (210; 310; 410; 510) or a spacer, and at the distal end by a locking ring nut (220; 320; 420; 520), and the spatial area extending between the shoulder (210; 310; 410; 510) or the spacer and the locking ring nut (220; 320; 420; 520) is suitable for being accommodated in one of the multiple shell seats (121) of the mounting table (12).

17. The conveying machine (1) according to claim 9, wherein: The coupling device is a positive coupling.

Images