Continuous forming device for special-shaped pipe

Abstract

The invention relates to a special-shaped pipe continuous forming device which is used for continuous forming of a special-shaped pipe fitting, the special-shaped pipe fitting comprises an overlapping section, an upper bending section, a right bending section, a lower bending section and a left bending section, and the overlapping section, the upper bending section, the right bending section, the lower bending section and the left bending section are sequentially perpendicular to one another in pairs. The overlapping section and the left bending section are attached and welded to form a welding position. The rolling forming device comprises a rolling forming frame, a forming roller, a welding device and a straightening device, and further comprises the forming roller arranged on the rolling forming frame. The forming rollers at least comprise lower forming rollers; the forming device further comprises at least one of an upper forming roller, a side forming roller and an inclined forming roller. The metal plates can be continuously manufactured into the special-shaped pipe fittings, and the production efficiency is high.

Description

Technical Field

[0001] The present invention relates to a highly versatile roll forming frame, a special-shaped tube continuous welding device, a special-shaped tube continuous forming device, and a special-shaped tube continuous forming method. Background Art

[0002] Special-shaped pipe fittings with an overall "6"-shaped cross-section are often used as structural parts for electric vehicles and other applications, and are in high demand.

[0003] The traditional method of making special-shaped pipe fittings with an overall "6"-shaped cross-section is to bend long strips of metal plates (i.e., rectangles with longer long sides) along their long sides one by one to make special-shaped pipe fittings with an overall "6"-shaped cross-section, which has low production efficiency.

[0004] In order to continuously produce special-shaped pipe fittings with an overall "6"-shaped cross-section, a large number of roll-forming stands need to be set up, but traditional roll-forming stands have low versatility.

[0005] In order to continuously produce special-shaped pipe fittings with an overall "6"-shaped cross-section, it is necessary to continuously weld the overlapping parts at the top of the special-shaped pipe fittings. However, traditional welding devices cannot ensure the welding quality of special-shaped pipe fittings with an overall "6"-shaped cross-section. Summary of the Invention

[0006] One object of the present invention is to solve or alleviate the above technical problems.

[0007] The means adopted by the present invention is a continuous forming device for special-shaped pipes, which is used for the continuous forming of special-shaped pipe fittings. The special-shaped pipe fittings include an overlapping section, an upper bending section, a right bending section, a lower bending section and a left bending section. The overlapping section, the upper bending section, the right bending section, the lower bending section and the left bending section are arranged in sequence and perpendicular to each other. The overlapping section and the left bending section are fitted and welded to form a weld; it includes a roller forming frame, a forming roller, a welding device and a straightening device, and also includes a forming roller arranged on the roller forming frame; the forming roller includes at least a lower forming roller; it also includes at least one of an upper forming roller, a side forming roller and an inclined forming roller.

[0008] The present invention has the effect of being able to continuously manufacture special-shaped pipe fittings from metal plates, with high production efficiency.

[0009] A further technical solution is that the roll forming frame includes a side frame and a lower roller shaft, the side frame includes a side frame column and a vertical side frame groove located between the side frames; lower roller shaft seats are provided at both ends of the lower roller shaft; the lower roller shaft seats are fixed in the side frame groove; the top of the side frame is threadedly connected to the lifting shaft; it also includes an upper roller shaft, upper roller shaft seats are provided at both ends of the upper roller shaft, the top of the upper roller shaft seat is hinged to the bottom end of the lifting shaft, and the upper roller shaft seats are respectively provided in the side frame grooves and can move along the side frame grooves.

[0010] A further technical solution also includes a side roller shaft and a side roller shaft seat, the side roller shaft is arranged on the side roller shaft seat, and the side roller shaft seat is directly or indirectly arranged in the side frame groove.

[0011] The side forming rollers can be conveniently arranged on the side roller shafts.

[0012] A further technical solution is that the roll forming frame also includes a side roller shaft support frame, a side roller adjustment seat and a side roller adjustment shaft; the side roller shaft seat is connected to the top end of the side roller shaft support frame in a transverse linear sliding manner, the side roller adjustment seat is arranged in the side frame groove and can move along the side frame groove, one end of the side roller adjustment shaft is hinged to the side roller adjustment seat, and the other end is threadedly connected to the side roller adjustment seat.

[0013] The lateral position of the side forming rollers can be easily adjusted and locked, making it easy to adjust the roller forming process.

[0014] A further technical solution also includes an inclined roller shaft, which is arranged on an inclined roller shaft seat. The two ends of the inclined roller shaft adjustment seat are respectively arranged in the side frame groove and can move along the side frame groove, and the tops of the two ends of the inclined roller shaft adjustment seat are respectively hinged to the bottom end of the lifting shaft.

[0015] The forming rollers can be arranged accordingly according to the needs of the roller forming process steps, the versatility is high, and the cost of the roller forming equipment can be reduced.

[0016] A further technical solution is that the welding device includes a welding part, a welding frame, a front holding structure and a rear holding structure; the front holding structure and the rear holding structure both include a holding structure, and the holding structure includes an upper inclined wheel, a lower support wheel, a left wheel and a right wheel; the upper inclined wheel, the lower support wheel, the left wheel and the right wheel form a gap and the gaps are aligned with each other, and the special-shaped pipe fittings are offset against the upper inclined wheel, the lower support wheel, the left wheel and the right wheel when passing through the gap formed by the upper inclined wheel, the lower support wheel, the left wheel and the right wheel; the welding part is arranged between the front holding structure and the rear holding structure.

[0017] It can ensure that the overlapping section and the left-bending section are kept in a fitted state when the weldment is welded to the special-shaped pipe fitting, thereby ensuring the welding quality of the special-shaped pipe fitting.

[0018] A further technical solution is that the front holding structure and the rear holding structure both include an upper inclined wheel adjustment structure, and the upper inclined wheel adjustment structure includes an upper inclined wheel axle frame, an upper inclined wheel lateral adjustment plate, an upper inclined wheel lateral adjustment bolt, an upper inclined wheel height adjustment plate and an upper inclined wheel height adjustment bolt; the upper inclined wheels are respectively arranged on the upper inclined wheel axle frame; the upper inclined wheel axle frame is fixed on the upper inclined wheel lateral adjustment plate; the upper inclined wheel lateral adjustment plate is connected to the upper inclined wheel height adjustment plate in a horizontal linear sliding manner, and the upper inclined wheel lateral adjustment bolt is hinged to the upper inclined wheel height adjustment plate and threadedly connected to the upper inclined wheel lateral adjustment plate; the upper inclined wheel height adjustment plate is connected to the welding frame in a vertical linear sliding manner, and the upper inclined wheel height adjustment bolt is hinged to the welding frame and threadedly connected to the upper inclined wheel height adjustment plate.

[0019] The position of the upper inclined wheel can be easily adjusted, and the upper inclined wheel can be accurately made to respectively abut the overlapping section and the upper bending section of the special-shaped pipe fitting, thereby ensuring stable welding quality.

[0020] A further technical solution also includes a side wheel adjustment structure, which includes two side wheel adjustment screws and two side wheel axle seats. The left wheel and the right wheel are respectively hinged on the side wheel axle seats, and the welding frame is provided with a transverse side wheel axle seat slide groove; the two side wheel axle seats are respectively arranged in the side wheel axle seat slide grooves and can respectively move along the side wheel axle seat slide grooves, and the two side wheel adjustment screws are respectively hinged to the side wheel axle seats and are respectively threadedly connected to the welding frame.

[0021] It is convenient to adjust the lateral positions of the left wheel and the right wheel, and can also ensure that the left wheel and the right wheel are aligned in the lateral direction.

[0022] A further technical solution is that the straightening device includes a straightening frame and a rotating disk hinged to the straightening frame; the rotating disk is evenly arranged with four straightening wheel axle seats around its axis, and the straightening wheel axles are hinged on the straightening wheel axles, and the four straightening wheel axles are respectively provided with an upper straightening wheel, a lower straightening wheel, a left straightening wheel, and a right straightening wheel, and when viewed along the axis of the rotating disk, the gap formed by the upper straightening wheel, the lower straightening wheel, the left straightening wheel, and the right straightening wheel is completely located in the center hole of the rotating disk.

[0023] It can straighten special-shaped pipe fittings after welding, eliminating bending and twisting deformation of special-shaped pipe fittings caused by high temperature of welding.

[0024] A further technical solution is that an upper straightening wheel protrusion is provided on the upper straightening wheel; the end face of the upper straightening wheel protrusion is fitted with one of the right straightening wheels; a lower straightening wheel protrusion is provided on the upper straightening wheel protrusion; the two end faces of the lower straightening wheel protrusion are respectively fitted with the left straightening wheel and the right straightening wheel.

[0025] It can ensure that all surfaces of the special-shaped pipe fittings are in contact with the straightening wheel when straightening the special-shaped pipe fittings, and the contact area is maximized, thereby ensuring the bending and straightening effect of the special-shaped pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of a device for continuously forming special-shaped tubes.

[0027] Figure 2 1 is a perspective view of the roll forming frame 1 of the first embodiment.

[0028] Figure 3 FIG. 1 is a schematic side view of the roll forming frame 1 of the first embodiment.

[0029] Figure 4 1 is a perspective view of a roll forming frame 1 according to a second embodiment.

[0030] Figure 5 1 is a schematic cross-sectional view of the roll forming frame 1 of the second embodiment; the cross section is a plane passing through the axis of the upper roller 12 and the axis of the lower roller 13.

[0031] Figure 6 1 is a perspective view of a roll forming frame 1 according to a third embodiment.

[0032] Figure 7 1 is a schematic cross-sectional view of a roll-forming frame 1 according to a third embodiment; the cross section is a plane passing through the axis of the upper roller 12 and the axis of the lower roller 13.

[0033] Figure 8 It is a perspective schematic diagram of the welding device 4.

[0034] Figure 9 It is a cross-sectional schematic diagram of the welding device 4; the cross section is a vertical plane perpendicular to the axis of the lower support wheel 452; the arrow ARR1 indicates the running direction of the special-shaped pipe fitting 9.

[0035] Figure 10 It is a cross-sectional schematic diagram of the welding device 4; the cross section is a vertical plane passing through the axis of the side wheel adjusting screw 473.

[0036] Figure 11 It is a three-dimensional schematic diagram of the straightening device 5.

[0037] Figure 12 3 is a side view of the straightening device 5.

[0038] Figure 13 It is a schematic cross-sectional view of the straightening device 5; the cross section is a vertical plane passing through the axis of the worm 532.

[0039] Figure 14 It is a side view schematic diagram of the special-shaped pipe fitting 9.

[0040] Figure 15 It is a schematic diagram of steps S00 to S12.

[0041] Figure 16 It is a schematic diagram of steps S13 to S15.

[0042] Figure 17 It is a schematic diagram of steps S21 to S23.

[0043] Figure 18 It is a schematic diagram of steps S24 to S26.

[0044] Figure 19 It is a schematic diagram of steps S27 to S29.

[0045] Figure 20 It is a schematic diagram of steps S291 to S32.

[0046] Figure 21 It is a schematic diagram of steps S33 to S35.

[0047] Figure 22 It is a schematic diagram of steps S36 to S38.

[0048] Figure 23 It is a schematic diagram of step S39.

[0049] Figure 24 It is a schematic diagram of steps S41 to S51.

[0050] exist Figures 15 to 24 In the figure, the structures other than the forming roller 2, the retaining structure 45 and the straightening wheel 52 are not drawn; the viewing angles are perpendicular to the special-shaped pipe 9; the dot-dash line represents the axis;

[0051] The accompanying drawings that best illustrate the technical features of the present invention are Figure 1 .

[0052] Arrow ARR1; roll forming frame 1; side frame 11; side frame column 111; side frame slot 112; height adjustment shaft 113; lifting shaft 114; linkage shaft 115; upper roller 12; upper roller seat 121; lower roller 13; lower roller seat 131; side roller 14; side roller seat 141; side roller support frame 142; side roller adjustment seat 143; side roller adjustment shaft 144; inclined roller 15; inclined roller seat 151; inclined roller adjustment seat 153; inclined roller adjustment shaft 154; slide rail structure 18; power connection 19; forming Forming roller 2; upper forming roller 21; overlapping section bending protrusion 211; overlapping section retaining protrusion 212; upward bending inclined surface 213; upper bending section pressing protrusion 214; left bending section inner bending protrusion 215; lower forming roller 22; upper bending section bending protrusion 221; left inner bending section bending protrusion 222; upward bending protrusion 223; side forming roller 23; oblique forming roller 24; end positioning protrusion 25; welding device 4; welding part 41; welding frame 42; side wheel axle seat slide 427; front retaining structure 43; rear retaining structure 44; retaining structure 45 ; Upper inclined wheel 451; Lower support wheel 452; Left side wheel 453; Right side wheel 454; Upper inclined wheel adjustment structure 46; Upper inclined wheel shaft frame 461; Upper inclined wheel lateral adjustment plate 462; Upper inclined wheel lateral adjustment bolt 463; Upper inclined wheel height adjustment plate 464; Upper inclined wheel height adjustment bolt 465; Side wheel adjustment structure 47; Side wheel axle seat 471; Side wheel axle 472; Side wheel adjustment screw 473; Straightening device 5; Straightening wheel axle 51; Straightening wheel axle seat 511; Straightening wheel frame 512; Radial adjustment bolt 513; Straightening wheel 52; Upper straightening wheel 521; lower straightening wheel 522; left straightening wheel 523; right straightening wheel 524; upper straightening wheel protrusion 525; lower straightening wheel protrusion 526; rotating disk 53; worm gear 531; worm 532; straightening frame 54; straightening frame base 541; straightening transverse frame 542; straightening transverse screw 543; straightening lifting frame 544; straightening lifting screw 545; special-shaped pipe fitting 9; overlapping section 91; upper bending section 92; right bending section 93; lower bending section 94; left bending section 95; left inner bending section 959; welding point 99. DETAILED DESCRIPTION

[0053] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0054] It should be noted that “left” and “right” in this application are relative concepts of orientation, so “left” and “right” may be interchanged in different drawings due to different viewing angles.

[0055] As a specific example, Figure 14As shown, the special-shaped tube continuous forming device of the embodiment of the present invention is used for the continuous forming of special-shaped tube fittings 9. The special-shaped tube fittings 9 include an overlapping section 91, an upper bending section 92, a right bending section 93, a lower bending section 94 and a left bending section 95. The overlapping section 91, the upper bending section 92, the right bending section 93, the lower bending section 94 and the left bending section 95 are perpendicular to each other in sequence (i.e., the overlapping section 91 and the upper bending section 92 are perpendicular to each other, the upper bending section 92 and the right bending section 93 are perpendicular to each other, and so on to the lower bending section 94 and the left bending section 95). The overlapping section 91 and the left bending section 95 are fitted and welded to form a weld 99, so that the cross section of the special-shaped tube fitting 9 is in the shape of "6". It should be noted that as Figure 14 The special-shaped pipe 9 shown is continuous in the direction perpendicular to the paper surface. In other words, Figure 14 The special-shaped pipe 9 shown has a long length in a direction perpendicular to the paper surface, and its length is theoretically equal to the length of a roll of steel plate. Figure 14 The special-shaped pipe 9 shown is cut after passing through the straightening device 5 described later, so that the length of the special-shaped pipe 9 perpendicular to the paper surface is the required length.

[0056] like Figure 1 As shown, the device for continuously forming a special-shaped tube according to an embodiment of the present invention comprises a roll forming frame 1 , a forming roller 2 , a welding device 4 and a straightening device 5 .

[0057] Figures 2 to 7 Three embodiments of the roll forming frame 1 are shown, wherein the roll forming frame 1 of the first embodiment includes a side frame 11 and a lower roller shaft 13 , and the side frame 11 includes a side frame column 111 and a vertical side frame groove 112 located between the side frames 11 .

[0058] Both ends of the lower roller shaft 13 are provided with lower roller shaft seats 131 ; the lower roller shaft seats 131 are fixed in the side frame groove 112 .

[0059] The top ends of the side frames 11 are each threadedly connected to a lifting shaft 114 .

[0060] The roll-forming frame 1 of the first embodiment further includes an upper roller shaft 12. Upper roller shaft seats 121 are provided at both ends of the upper roller shaft 12. The top ends of the upper roller shaft seats 121 are hingedly connected to the bottom ends of the lifting shafts 114. The upper roller shaft seats 121 are respectively disposed within the side frame grooves 112 and are movable along the side frame grooves 112. The upper roller shaft 12 is used to mount an upper forming roller 21, which will be described later. Both ends of the upper roller shaft 12 are typically connected to the upper roller shaft seats 121 via bearings (not shown in the drawings) to enable rotation.

[0061] As one specific embodiment, a linkage shaft 115 is provided between the two lifting shafts 114 along the upper roller seat 121. The linkage shaft 115 is connected to the two lifting shafts 114 via a worm gear. Rotating the linkage shaft 115 allows the two lifting shafts 114 along the upper roller seat 121 to rise and fall synchronously, ensuring that the upper roller 12 remains level when adjusting its height.

[0062] The roll-forming frame 1 of the second embodiment differs from that of the first embodiment in that it further includes a side roller shaft 14 and a side roller shaft seat 141. The side roller shaft 14 is mounted on the side roller shaft seat 141. For example, the side roller shaft 14 is mounted on the side roller shaft seat 141 via a bearing (not shown in the drawings) so as to be rotatable about the side roller shaft seat 141. The side roller shaft seat 141 is directly or indirectly mounted within the side frame groove 112. The side forming roller 23, described below, can be conveniently mounted on the side roller shaft 14.

[0063] As one specific embodiment, the roll-forming frame 1 further includes a side roller support frame 142, a side roller adjustment seat 143, and a side roller adjustment shaft 144. The side roller seat 141 is connected to the top end of the side roller support frame 142 in a transverse linear sliding manner, for example, via a slide rail structure 18. The side roller adjustment seat 143 is disposed within the side frame groove 112 and is movable along the side frame groove 112. The side roller adjustment shaft 144 is hingedly connected to the side roller adjustment seat 143 at one end and threadedly connected to the side roller adjustment seat 143 at the other end. Rotating the side roller adjustment shaft 144 facilitates adjusting and locking the transverse position of the side forming rollers 23, described later, to facilitate adjustment of the roll-forming process.

[0064] The roll-forming stand 1 of the third embodiment differs from the first embodiment in that it further includes an inclined roller 15, which is mounted on an inclined roller seat 151. The ends of the inclined roller adjustment seat 153 are disposed within the side frame slots 112 and are movable along the side frame slots 112. The top ends of the inclined roller adjustment seat 153 are hingedly connected to the bottom ends of the lifting shafts 114. As can be seen from the roll-forming stand 1 of the three embodiments described above, the roll-forming stand 1 can be configured with forming rollers 2 according to the needs of the roll-forming process steps, resulting in high versatility and reduced roll-forming equipment costs.

[0065] As one specific embodiment, the skew roller adjustment seat 153 is hingedly connected to a transverse skew roller adjustment shaft 154; the skew roller adjustment shaft 154 is threadedly connected to the skew roller seat 151, and the skew roller seat 151 is linearly slidably connected to the skew roller adjustment seat 153. Rotating the skew roller adjustment shaft 154 can move the skew roller 15 laterally and then lock it, facilitating adjustment of the lateral position of the skew forming roller 24 described later.

[0066] like Figures 8 to 10 As shown, the welding device 4 includes a welding part 41 , a welding frame 42 , a front holding structure 43 and a rear holding structure 44 .

[0067] The front retaining structure 43 and the rear retaining structure 44 both include a retaining structure 45, and the retaining structure 45 includes an upper inclined wheel 451, a lower supporting wheel 452, a left side wheel 453 and a right side wheel 454; the upper inclined wheel 451, the lower supporting wheel 452, the left side wheel 453 and the right side wheel 454 together form a gap and the gaps are aligned with each other (that is, the gap of the front retaining structure 43 and the gap of the rear retaining structure 44 are aligned with each other), and the special-shaped pipe fitting 9 is offset against the upper inclined wheel 451, the lower supporting wheel 452, the left side wheel 453 and the right side wheel 454 when passing through the gap.

[0068] The welding part 41 is arranged between the front holding structure 43 and the rear holding structure 44. The welding part 41 is a welding device of the prior art, such as a laser welding device of the prior art. When the continuous special-shaped pipe 9 formed by the roller forming process passes through the front holding structure 43 and the rear holding structure 44, the side walls of the special-shaped pipe 9 are respectively supported by the upper inclined wheel 451, the lower support wheel 452, the left wheel 453 and the right wheel 454 in the front holding structure 43 and the rear holding structure 44. Even if stress exists in the special-shaped pipe 9 due to factors such as the material difference of the special-shaped pipe 9 and the position of the forming roller 2, it can ensure that the overlapping section 91 and the left bend section 95 remain in contact with each other when the welding part 41 welds the special-shaped pipe 9, thereby ensuring the welding quality of the special-shaped pipe 9.

[0069] As one of the specific embodiments, the welding device 4, the front holding structure 43 and the rear holding structure 44 both include an upper inclined wheel adjustment structure 46, and the upper inclined wheel adjustment structure 46 includes an upper inclined wheel shaft frame 461, an upper inclined wheel lateral adjustment plate 462, an upper inclined wheel lateral adjustment bolt 463, an upper inclined wheel height adjustment plate 464 and an upper inclined wheel height adjustment bolt 465; the upper inclined wheel 451 is respectively arranged on the upper inclined wheel shaft frame 461; the upper inclined wheel shaft frame 461 is fixed on the upper inclined wheel lateral adjustment plate 462; the upper inclined wheel lateral adjustment plate 462 is horizontally and linearly slidably connected to the upper inclined wheel height adjustment plate 464, the upper inclined wheel lateral adjustment bolt 463 is hinged to the upper inclined wheel height adjustment plate 464 and is threadedly connected to the upper inclined wheel lateral adjustment plate 462; the upper inclined wheel height adjustment plate 464 is vertically and linearly slidably connected to the welding frame 42, and the upper inclined wheel height adjustment bolt 465 is hinged to the welding frame 42 and is threadedly connected to the upper inclined wheel height adjustment plate 464. The position of the upper inclined wheel 451 can be easily adjusted, and the upper inclined wheel 451 can be accurately made to respectively abut the overlapping section 91 and the upper bending section 92 of the special-shaped pipe fitting 9, thereby ensuring stable welding quality.

[0070] As one of the specific embodiments, the welding device 4 further includes a side wheel adjustment structure 47, which includes two side wheel adjustment screws 473 and two side wheel axle seats 471. The left side wheel 453 and the right side wheel 454 are respectively hinged on the side wheel axle seats 471, and the welding frame 42 is provided with a transverse side wheel axle seat slot 427; the two side wheel axle seats 471 are respectively disposed in the side wheel axle seat slot 427 and can respectively move along the side wheel axle seat slot 427, and the two side wheel adjustment screws 473 are respectively hinged to the side wheel axle seats 471 and are respectively threadedly connected to the welding frame 42. Rotating the side wheel adjustment screws 473 can respectively cause the left side wheel 453 and the right side wheel 454 to move laterally, thereby facilitating adjustment of the lateral positions of the left side wheel 453 and the right side wheel 454, and can also ensure that the left side wheel 453 and the right side wheel 454 are aligned laterally.

[0071] like Figures 11 to 13 As shown, the welding device 4 also includes a straightening device 5 disposed at its output end; the straightening device 5 includes a straightening frame 54 and a rotating disk 53 hingedly connected to the straightening frame 54; the rotating disk 53 is evenly arranged with four straightening wheel axle seats 511 around its axis, each of which is hingedly connected to a straightening wheel axle 51. It is easy to understand that there are four straightening wheel axle seats 511 and straightening wheel axles 51, and the angle between two adjacent straightening wheel axle seats 511 and the axis of the rotating disk 53 is 90 degrees. The four straightening wheel axles 51 are respectively provided with an upper straightening wheel 521, a lower straightening wheel 522, a left straightening wheel 523, and a right straightening wheel 524. When viewed along the axis of the rotating disk 53, the gap formed by the upper straightening wheel 521, the lower straightening wheel 522, the left straightening wheel 523, and the right straightening wheel 524 is completely located within the center hole of the rotating disk 53 (not shown in the drawings). The special-shaped pipe fitting 9 passing through the center hole of the rotating disk 53 and the gap formed by the upper straightening wheel 521, the lower straightening wheel 522, the left straightening wheel 523 and the right straightening wheel 524 is respectively supported by the upper straightening wheel 521, the lower straightening wheel 522, the left straightening wheel 523 and the right straightening wheel 524, so that the special-shaped pipe fitting 9 can be straightened after welding, eliminating the bending deformation (bending deformation of the special-shaped pipe fitting 9 along its length direction, which makes the special-shaped pipe fitting 9 not in a straight line along its length direction) and twisting deformation (rotational deformation of the special-shaped pipe fitting 9 around its length direction) of the special-shaped pipe fitting 9 due to the high temperature of welding.

[0072] As one specific embodiment, the upper straightening wheel 521 is provided with an upper straightening wheel protrusion 525; the end surface of the upper straightening wheel protrusion 525 is in contact with one of the right straightening wheels 524; the upper straightening wheel protrusion 525 is provided with a lower straightening wheel protrusion 526; the two end surfaces of the lower straightening wheel protrusion 526 are respectively in contact with the left straightening wheel 523 and the right straightening wheel 524. This ensures that when straightening the special-shaped pipe 9, all surfaces of the special-shaped pipe 9 are in contact with the straightening wheel 52, and the contact area is maximized, thereby ensuring the bending straightening effect of the special-shaped pipe 9.

[0073] As one specific embodiment, a worm 532 is directly or indirectly hinged to the straightening frame 54, and the outer periphery of the rotating disk 53 is a worm wheel 531 that meshes with the worm 532. Rotating the worm 532 can rotate the rotating disk 53 about its axis, conveniently performing twisting and straightening on the special-shaped pipe 9. In addition, due to the meshing action of the worm 532 and the worm wheel 531, the reaction force exerted on the rotating disk 53 during twisting and straightening of the special-shaped pipe 9 cannot cause the rotating disk 53 to rotate, thereby ensuring a stable twisting and straightening effect on the special-shaped pipe 9.

[0074] As one specific embodiment, the straightening device 5 also includes a straightening frame base 541, a straightening transverse frame 542, and a straightening lifting frame 544. The straightening transverse frame 542 is laterally linearly slidably connected to the straightening frame base 541, and the straightening lifting frame 544 is vertically linearly slidably connected to the straightening frame 542. A horizontal straightening transverse screw 543 is hingedly connected to the straightening frame base 541, and the straightening transverse screw 543 is threadedly connected to the straightening transverse frame 542. A vertical straightening lifting screw 545 is hingedly connected to the straightening transverse frame 542, and the straightening lifting screw 545 is threadedly connected to the straightening lifting frame 544. The lateral position and height of the rotating disk 53 can be easily adjusted and then locked to ensure a stable straightening process.

[0075] like Figures 15 to 24 As shown, the method for continuously forming a different-shaped tube utilizes the apparatus described above. The apparatus further includes forming rollers 2 disposed on a roll-forming frame 1. The forming rollers 2 include at least a lower forming roller 22 and at least one of an upper forming roller 21, a side forming roller 23, and an oblique forming roller 24. The lower forming roller 22 can be conveniently installed, and with only minor modifications, the upper forming roller 21, side forming roller 23, and oblique forming roller 24 can be installed as needed for the continuous roll-forming process, resulting in high versatility.

[0076] The method for continuously forming a special-shaped tube comprises the following steps:

[0077] Step S00: unwinding the coiled metal sheet and conveying it to the roll forming stand 1 and the forming roller 2. Typically, the coiled metal sheet is unwound and conveyed to the forming roller 2 by an unwinding device (not shown) of the prior art.

[0078] Steps S11 to S39 are roll forming steps, in which the metal sheet is continuously rolled by the roll forming frame 1 and the forming roller 2 to form an overlapping section 91, an upper bending section 92, a right bending section 93, a lower bending section 94, and a left bending section 95 in sequence and perpendicular to each other, and the overlapping section 91 and the left bending section 95 are fitted together.

[0079] Step S41 to step S42, the welding step, through the front holding structure 43 and the rear holding structure 44 of the welding device 4, bend and hold the overlapping section 91, the upper bending section 92, the right bending section 93, the lower bending section 94, and the left bending section 95 in sequence and perpendicular to each other, and in a state where the overlapping section 91 and the left bending section 95 are in contact with each other, the overlapping section 91 and the left bending section 95 are welded to form a welding point 99 to form a special-shaped pipe fitting 9.

[0080] like Figures 15 to 23 As shown, wherein the roll forming step includes the following steps,

[0081] In step S11, the upper forming roller 21 is provided with an overlapping section curved protrusion 211. End positioning protrusions 25 are provided at each end of the upper forming roller 21, respectively, to mate with the ends of the lower forming roller 22, ensuring accurate axial alignment between the upper and lower forming rollers 21, 22. The overlapping section curved protrusions 211 cooperate with the lower forming roller 22 to bend the metal sheet downward to form the overlapping section 91. It will be readily understood that the lower forming roller 22 is provided with an inclined surface that aligns with the overlapping section curved protrusions 211.

[0082] In step S12, the angle of the downward bend of the overlapping section bending protrusion 211 (relative to the horizontal plane) is increased compared to step S11. The overlapping section bending protrusion 211 cooperates with the lower forming roller 22 to further bend the overlapping section 91 downward, increasing the bending angle of the overlapping section 91, so that the bending angle of the overlapping section 91 approaches 90 degrees.

[0083] From steps S13 to S15, the downward bend angle (relative to the horizontal plane) of the overlapping section bending projection 211 gradually increases compared to step S12. The overlapping section bending projection 211 cooperates with the lower forming roller 22 to gradually bend the overlapping section 91 downward further, gradually increasing the bending angle of the overlapping section 91 until the bending angle of the overlapping section 91 approaches 90 degrees. Step S15 is the final step in bending the overlapping section 91. The bending angle of the overlapping section 91 approaches 90 degrees but remains less than 90 degrees, for example, 80 degrees. The gradual bending process forms the overlapping section 91, ensuring the quality of the bent overlapping section 91.

[0084] In step S21, the lower forming roller 22 is provided with an upper bending section bending protrusion 221. The upper bending section bending protrusion 221 cooperates with the upper forming roller 21 to bend the metal sheet upward to form the upper bending section 92. The upper forming roller 21 is provided with an overlapping section retaining protrusion 212. The overlapping section retaining protrusion 212 is in contact with the overlapping section 91, ensuring that the overlapping section 91 does not bend upward and return to its original position due to the stress generated by the upward bending of the upper bending section 92. It is easy to understand that the upper forming roller 21 is provided with an inclined surface that cooperates with the upper bending section bending protrusion 221.

[0085] In steps S22 to S26, the angle at which the upper bending section protrusion 221 bends upward gradually increases. The upper bending section protrusion 221 cooperates with the upper forming roller 21 to further bend the upper bending section protrusion 221 upward, gradually increasing the bending angle of the upper bending section protrusion 221 until the bending angle of the upper bending section protrusion 221 approaches 90 degrees. Simultaneously, the overlapping section retaining protrusion 212 cooperates with the lower forming roller 22 to further bend the overlapping section 91 downward, gradually increasing the bending angle of the overlapping section 91 until the bending angle of the overlapping section 91 approaches 90 degrees.

[0086] From step S27 to step S28, the lower forming roller 22 is provided with a left inner bending section bending protrusion 222. The left inner bending section bending protrusion 222 cooperates with the upper forming roller 21 to bend the metal sheet upward to form the left inner bending section 959. Simultaneously, the upward bending angle of the upper bending section bending protrusion 221 gradually increases. The upper bending section bending protrusion 221 cooperates with the upper forming roller 21 to further bend the upper bending section bending protrusion 221 upward, gradually increasing the bending angle of the upper bending section bending protrusion 221, bringing the bending angle of the upper bending section bending protrusion 221 closer to 90 degrees. Simultaneously, the overlapping section retaining protrusion 212 cooperates with the lower forming roller 22 to further bend the overlapping section 91 downward, gradually increasing the bending angle of the overlapping section 91, bringing the bending angle of the overlapping section 91 closer to 90 degrees.

[0087] In step S29, the left inner-bend section bending projection 222 bends the left inner-bend section 959 to the desired angle. Simultaneously, the overlapping section retaining projection 212 cooperates with the lower forming roller 22 to further bend the overlapping section 91 downward, bringing the bending angle of the overlapping section 91 to 90 degrees. Simultaneously, the upper bending section bending projection 221 further increases its upward bending angle.

[0088] In step S291, the side forming roller 23 is set by the side roller shaft 14 of the roll forming frame 1. The end faces of the side forming roller 23 and the upper forming roller 21 clamp the upper bending section 92 so that the bending angle of the upper forming roller 21 reaches ninety degrees.

[0089] By the end of step S291, the left inner bending section 959, the overlapping section 91, and the upper bending section 92 have all reached the required angles.

[0090] In step S31, both end surfaces of the upper forming roller 21 are provided with upward bending inclined surfaces 213, and the lower forming roller 22 is provided with upward bending protrusions 223 respectively cooperating with the upward bending inclined surfaces 213. The upper forming roller 21 and the lower forming roller 22 clamp the lower bending section 94, and the upward bending inclined surfaces 213 cooperate with the lower forming roller 22 to bend the metal plate to form a right bending section 93 and a left bending section 95.

[0091] From steps S32 to S34, the upward bend angles of the upwardly curved surface 213 and the upwardly curved protrusion 223 gradually increase. The upper forming roller 21 and the lower forming roller 22 clamp the lower bend section 94, and the upwardly curved surface 213 cooperates with the upwardly curved protrusion 223 to further bend the right bend section 93 and the left bend section 95 upward until the intersection of the overlapping section 91 and the upper bend section 92 is aligned with or close to the end surface of the upper forming roller 21. It is easy to understand that in step S34, interference exists between the intersection of the overlapping section 91 and the upper bend section 92 and the end surface of the upper forming roller 21. The upper forming roller 21 alone cannot further increase the bending angles of the lower bend section 94 and the left bend section 95. Therefore, the inclined forming roller 24 in the subsequent step is required to further increase the bending angles of the right bend section 93 and the left bend section 95. This allows the right bend section 93 and the left bend section 95 to be bent simultaneously, resulting in higher efficiency.

[0092] In steps S35 and S36, the inclined forming rollers 24 are positioned via the inclined roller shafts 15 of the roll-forming frame 1. These rollers cooperate with the upwardly curved protrusions 223 to further increase the bending angles of the right and left bending sections 93 and 95. Simultaneously, the inclined forming rollers 24 avoid the intersection of the overlapping section 91 and the upper bending section 92. Compared to the inclined forming rollers 24 in step S35, the inclined forming rollers 24 in step S36 are thinner, providing more clearance.

[0093] In step S37, the side forming rollers 23 are positioned via the side roller shafts 14 of the roll-forming frame 1. The upper forming roller 21 is provided with an upper bending section downward pressing protrusion 214 and a left bending section inward bending protrusion 215. The upper bending section downward pressing protrusion 214 abuts the upper bending section 92, and the right bending section 93 engages the side forming roller 23, further increasing the bending angle of the right bending section 93. The left bending section inward bending protrusion 215 cooperates with the side forming roller 23 to further increase the bending angle of the left bending section 95. It will be readily understood that in this step, the side surfaces of the side forming rollers 23 are all inclined, giving the side forming rollers 23 an overall truncated cone shape.

[0094] In step S38, the oblique forming roller 24 is set via the oblique roller shaft 15 of the roll-forming frame 1; and the side forming roller 23 is set via the side roller shaft 14 of the roll-forming frame 1. The oblique forming roller 24 abuts against the intersection of the right bending section 93 and the lower bending section 94, and the side forming roller 23 is respectively in contact with the right bending section 93 and the left bending section 95 and abuts against the intersection of the right bending section 93 and the left bending section 95, thereby further increasing the bending angle of the right bending section 93 and the bending angle of the left bending section 95. While forming the bending angle of the right bending section 93 and the bending angle of the left bending section 95, the outer surfaces of the right bending section 93 and the left bending section 95 are not abutted, ensuring that the outer surfaces of the right bending section 93 and the left bending section 95 are smooth.

[0095] In step S39, the side forming rollers 23 are positioned via the side roller shafts 14 of the roll-forming frame 1. The upper forming roller 21 is provided with an upper bending section downward pressing protrusion 214 and a left bending section inward bending protrusion 215. The upper bending section downward pressing protrusion 214 abuts against the upper bending section 92, and the right bending section 93 engages with the side forming roller 23, further increasing the bending angle of the right bending section 93. The left bending section inward bending protrusion 215 cooperates with the side forming roller 23 to further increase the bending angle of the left bending section 95.

[0096] As of step S39, the angle between the overlapping section 91 and the upper bending section 92, and the angle between the upper bending section 92 and the right bending section 93 are both ninety degrees, and the angle between the right bending section 93 and the lower bending section 94, and the angle between the lower bending section 94 and the left bending section 95 are both close to ninety degrees.

[0097] As mentioned above, S39 is followed by steps S41 to S42, in which the front retaining structure 43 and the rear retaining structure 44 of the welding device 4 are used to bend and hold the overlapping section 91, the upper bending section 92, the right bending section 93, the lower bending section 94, and the left bending section 95 in sequence and perpendicular to each other, and the overlapping section 91 and the left bending section 95 are in a state of being in contact with each other, and then the overlapping section 91 and the left bending section 95 are welded to form a welding point 99 to form a special-shaped pipe fitting 9.

[0098] Step S42 is followed by step S51 , in which the special-shaped pipe fitting 9 is straightened by the straightening device 5 to eliminate bending deformation and / or twisting deformation of the special-shaped pipe fitting 9 caused by high temperature of welding.

[0099] After step S51 , the continuous special-shaped pipe fittings 9 are cut (the equipment used for cutting is prior art and will not be described in detail here) to form individual special-shaped pipe fittings 9 .

[0100] It can be seen from the above that the method for continuously forming special-shaped tubes of the present invention can produce special-shaped tubes 9 from metal plates with high production efficiency.

Claims

1. A device for continuously forming a special-shaped tube, which is used for continuously forming a special-shaped tube (9), wherein the special-shaped tube (9) comprises an overlapping section (91), an upper bending section (92), a right bending section (93), a lower bending section (94) and a left bending section (95), wherein the overlapping section (91), the upper bending section (92), the right bending section (93), the lower bending section (94) and the left bending section (95) are arranged in sequence and perpendicular to each other, and the overlapping section (91) and the left bending section (95) are fitted and welded to form a weld (99); the device comprises a roll forming frame (1), a forming roller (2), a welding device (4) and a straightening device (5). Its characteristics are: It also includes a forming roller (2) arranged on a roll forming frame (1); the forming roller (2) includes at least a lower forming roller (22); and it also includes at least one of an upper forming roller (21), a side forming roller (23), and an oblique forming roller (24).

2. The device for continuously forming special-shaped tubes according to claim 1, characterized in that: The roll forming frame (1) includes a side frame (11) and a lower roller shaft (13), wherein the side frame (11) includes a side frame column (111) and a side frame groove (112) located between the side frames (11) and vertically extending therebetween; lower roller shaft seats (131) are provided at both ends of the lower roller shaft (13); the lower roller shaft seats (131) are fixed in the side frame groove (112); the top end of the side frame (11) is threadedly connected to a lifting shaft (114); and the roll forming frame (12) also includes an upper roller shaft (12), wherein both ends of the upper roller shaft (12) are provided with an upper roller shaft seat (121), the top end of the upper roller shaft seat (121) is hinged to the bottom end of the lifting shaft (114), and the upper roller shaft seats (121) are respectively provided in the side frame groove (112) and can move along the side frame groove (112).

3. The device for continuously forming special-shaped tubes according to claim 1, wherein: It also includes a side roller shaft (14) and a side roller shaft seat (141), wherein the side roller shaft (14) is arranged on the side roller shaft seat (141), and the side roller shaft seat (141) is directly or indirectly arranged in the side frame groove (112).

4. The device for continuously forming special-shaped tubes according to claim 1, wherein: The roll forming frame (1) further comprises a side roller shaft support frame (142), a side roller adjustment seat (143) and a side roller adjustment shaft (144); the side roller shaft seat (141) is connected to the top end of the side roller shaft support frame (142) in a transverse linear sliding manner, the side roller adjustment seat (143) is arranged in the side frame groove (112) and can move along the side frame groove (112), and one end of the side roller adjustment shaft (144) is hinged to the side roller adjustment seat (143) and the other end is threadedly connected to the side roller adjustment seat (143).

5. The device for continuously forming special-shaped tubes according to claim 1, wherein: The device further comprises an inclined roller shaft (15), wherein the inclined roller shaft (15) is arranged on an inclined roller shaft seat (151), and both ends of an inclined roller shaft adjustment seat (153) are respectively arranged in a side frame groove (112) and can move along the side frame groove (112), and the tops of both ends of the inclined roller shaft adjustment seat (153) are respectively hinged to the bottom end of the lifting shaft (114).

6. The device for continuously forming special-shaped tubes according to claim 1, wherein: The welding device (4) comprises a welding part (41), a welding frame (42), a front holding structure (43) and a rear holding structure (44); the front holding structure (43) and the rear holding structure (44) both comprise a holding structure (45), and the holding structure (45) comprises an upper inclined wheel (451), a lower supporting wheel (452), a left wheel (453) and a right wheel (454); the upper inclined wheel (451), the lower supporting wheel (452), the left wheel (453) and the right wheel (454) enclose a gap formed by the upper inclined wheel (451), the lower supporting wheel (452), the left wheel (453) and the right wheel (454), and the gaps are aligned with each other; when the special-shaped pipe (9) passes through the gap enclosed by the upper inclined wheel (451), the lower supporting wheel (452), the left wheel (453) and the right wheel (454), the special-shaped pipe (9) abuts against the upper inclined wheel (451), the lower supporting wheel (452), the left wheel (453) and the right wheel (454); the welding part (41) is arranged between the front holding structure (43) and the rear holding structure (44).

7. The device for continuously forming special-shaped tubes according to claim 1, wherein: The front holding structure (43) and the rear holding structure (44) both include an upper inclined wheel adjustment structure (46), and the upper inclined wheel adjustment structure (46) includes an upper inclined wheel shaft frame (461), an upper inclined wheel transverse adjustment plate (462), an upper inclined wheel transverse adjustment bolt (463), an upper inclined wheel height adjustment plate (464) and an upper inclined wheel height adjustment bolt (465); the upper inclined wheels (451) are respectively arranged on the upper inclined wheel shaft frame (461); the upper inclined wheel shaft frame (461) is fixed to the upper inclined wheel transverse adjustment plate (462); the upper inclined wheel transverse adjustment bolt (463 ...3); the upper inclined wheel transverse adjustment bolt (463) is fixed to the upper inclined wheel transverse adjustment plate (463); the upper inclined wheel transverse adjustment bolt ( 2) upper; the upper inclined wheel transverse adjustment plate (462) is connected to the upper inclined wheel height adjustment plate (464) in a transverse linear sliding manner, the upper inclined wheel transverse adjustment bolt (463) is hinged to the upper inclined wheel height adjustment plate (464) and is threadedly connected to the upper inclined wheel transverse adjustment plate (462); the upper inclined wheel height adjustment plate (464) is connected to the welding frame (42) in a vertical linear sliding manner, the upper inclined wheel height adjustment bolt (465) is hinged to the welding frame (42) and is threadedly connected to the upper inclined wheel height adjustment plate (464).

8. The device for continuously forming special-shaped tubes according to claim 1, wherein: The side wheel adjusting structure (47) further comprises two side wheel adjusting screws (473) and two side wheel axle seats (471). The left side wheel (453) and the right side wheel (454) are respectively hinged on the side wheel axle seats (471). The welding frame (42) is provided with a transverse side wheel axle seat sliding groove (427). The two side wheel axle seats (471) are respectively arranged in the side wheel axle seat sliding groove (427) and can respectively move along the side wheel axle seat sliding groove (427). The two side wheel adjusting screws (473) are respectively hinged to the side wheel axle seats (471) and are respectively threadedly connected to the welding frame (42).

9. The device for continuously forming special-shaped tubes according to claim 1, wherein: The straightening device (5) comprises a straightening frame (54) and a rotating disk (53) hinged to the straightening frame (54); the rotating disk (53) is evenly provided with four straightening wheel shaft seats (511) around its axis, and the straightening wheel shaft seats (511) are hinged with a straightening wheel shaft (51); the four straightening wheel shafts (51) are respectively provided with an upper straightening wheel (521), a lower straightening wheel (522), a left straightening wheel (523), and a right straightening wheel (524); and when viewed along the axis of the rotating disk (53), a gap formed by the upper straightening wheel (521), the lower straightening wheel (522), the left straightening wheel (523), and the right straightening wheel (524) is completely located in the center hole of the rotating disk (53).

10. The device for continuously forming special-shaped tubes according to claim 1, wherein: An upper straightening wheel protrusion (525) is provided on the upper straightening wheel (521); an end surface of the upper straightening wheel protrusion (525) is fitted with one of the right straightening wheels (524); a lower straightening wheel protrusion (526) is provided on the upper straightening wheel protrusion (525); two end surfaces of the lower straightening wheel protrusion (526) are fitted with the left straightening wheel (523) and the right straightening wheel (524) respectively.

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