A seamless square tube pressing and forming device and method

Abstract

The present invention provides a seamless square tube pressing and forming equipment and method in the field of steel tube processing technology, including a reducing assembly, which is used to gradually reduce the diameter of a seamless round tube into a plurality of groups of square tubes with rounded edges, and the reducing assemblies are arranged in sequence along the conveying direction; a profiling assembly, which presses the rounded square tube into a side corrugated square tube, and the profiling assembly is arranged at the conveying end of the steel tube by the reducing assembly; it is characterized in that it also includes: a supporting top portion, which is respectively arranged on both sides of the profiling assembly for extending into the tube when pressing the ends of the rounded square tube, pulling the square tube to both sides along the length and width direction, and intermittently supporting the end position of the rounding; a flattening portion, which is installed on one side of the profiling assembly for cutting the end faces of the square tube after pressing after the minimum cutting amount is positioned. The present invention has the advantages of good end forming effect during the square tube pressing and forming process, and less end surface flattening and cutting waste.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe processing, and in particular to a seamless square pipe pressing and forming device and method. Background Art

[0002] During the processing and production of seamless square tubes, cylindrical steel tubes can be pressed into square shapes by cold drawing, extrusion, cold pressing, etc. In the cold pressing process, the circular steel tube is gradually reduced in diameter by two or four rounds of cold pressing to obtain a square tube with rounded (arc-shaped) edges. Then, it is subjected to a final four-round cold compression process to obtain a four-cornered square tube. Subsequently, due to the unstable load-bearing at the end of the pressed square tube, the end wall of the square tube is bent, and a cutting tool is required to cut off the bent part of the end of the square tube for flattening.

[0003] Chinese patent CN202122730772.9 discloses an aluminum alloy special-shaped seamless square tube extrusion die, comprising: an extrusion barrel having an accommodating cavity therein, an extrusion die which is detachably fixedly connected to the bottom of the extrusion barrel, and a die body is embedded and fixedly disposed inside the extrusion die.

[0004] However, although this technical solution can realize the forming process of seamless square tubes by extrusion, during the forming process, due to the lack of support in the end area of ​​the steel tube, the tube walls of the two ends of the pressed square tube are prone to collapse during the forming process, thereby forming curved side walls. At the same time, when the pressed square tube is cut and leveled, due to the large bending length, the cutting amount during the leveling of the square tube ends is also relatively large, resulting in a large amount of consumables during the leveling of the square tube ends. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and provide a seamless square tube pressing and forming device and method, which gradually reduces the diameter of a cylindrical steel tube through a reducing component to obtain a rounded square tube, reciprocates through an ejector to drive a corrugated support top member toward the middle of the rounding, and pulls the support top from the middle to both sides of the side support top member on the side wall of the square tube, and then completes cold pressing on the outside of the square tube through a profiling component, and drives the corrugated support top member and the side support top member to adaptively adjust the intermittent support top movement of the square tube through a follow-up adjustment component, and after the head and tail of the square tube are pressed, the positioning component is used to position the end portion to the maximum depression amount in the axial direction of the square tube, and then the cutting component controls the cutting residue according to the maximum depression amount to complete the flattening of the square tube end face, so as to solve the technical problems described in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A seamless square tube pressing and forming equipment comprises a reducing assembly, which is used to gradually reduce the diameter of a seamless round tube into a plurality of groups of square tubes with rounded edges, and the reducing assemblies are arranged in sequence along the conveying direction; a profiling assembly is used to press the rounded square tube into a side-corrugated square tube, and the profiling assembly is arranged at the conveying end of the steel tube by the reducing assembly; it is characterized in that it also comprises: a supporting top portion, which is respectively arranged on both sides of the profiling assembly for extending into the tube when pressing the ends of the rounded square tube, pulling the square tube to both sides along the length and width direction, and intermittently supporting the end position of the rounding; a flattening portion, which is installed on one side of the profiling assembly for positioning and cutting the end faces of the square tube after pressing with the minimum cutting amount; a holding assembly, which is arranged at the output end of the profiling assembly so that the moving center of the square tube output by the profiling assembly remains unchanged.

[0008] Furthermore, the supporting top portion includes: a supporting top component that is intermittent, pulled toward both sides of the length and width direction of the square tube, and supports the top toward the middle of the rounded square tube; a follow-up adjustment component that enables the supporting top component to move with the square tube and enables the supporting top component that leaves the square tube to return to its original position, and is installed on one side of the supporting top component; and an adjusting component that connects the power end of the adjusting component that withdraws the supporting top component and the follow-up adjustment component to the follow-up adjustment component.

[0009] Furthermore, the top support assembly includes: a machine base; a rib support top piece that is slidably inserted, elastically connected to the machine base and corresponds to the movement of the end point of the square tube rounding; a plurality of groups of side support top pieces that are slidably inserted, elastically connected to the machine base and located between adjacent rib support top pieces; and an ejection piece installed on the machine base to eject the rib support top piece and the side support top piece synchronously.

[0010] Furthermore, the side support top members on the same plane are symmetrically inserted on the machine base, and the inclination angle increases gradually from the middle to one side.

[0011] Furthermore, the ejector member includes: a guide seat slidably inserted on the machine base; and an ejector power member driving the guide seat to move back and forth; the guide seat is provided with a first guide channel corresponding to the rib support ejector member; the guide seat is provided with a second guide channel corresponding to the side support ejector member.

[0012] Furthermore, the follow-up adjustment component includes: an adjustment seat slidably connected to the machine base; a power roller arranged on the adjustment seat, and a guide track symmetrically connected to the power roller; and a guide member with one end connected to the machine base and the other end inserted into the guide track.

[0013] Furthermore, the leveling part includes: a positioning and cutting component for positioning and pressing the maximum depth of the end face of the square tube and performing cutting after corresponding adjustment of the cutting position; and a steering component, which adjusts the positioning and cutting component and connects the power end of the steering component arranged corresponding to the head and tail end faces of the square tube to the positioning and cutting component.

[0014] Furthermore, the positioning and cutting assembly includes: a frame; an abutment seat arranged on one side of the frame and elastically connected to the steering assembly; a positioning assembly, which feeds back the shape of the end face of the square tube to the abutment seat and positions the abutment seat to the deepest position of the end face of the square tube, and the positioning assembly is slidably arranged on the frame; and a cutting assembly installed on the abutment seat and used for cutting the end face excess material of the square tube.

[0015] Furthermore, the positioning assembly includes: a first resistance member arranged circumferentially along the end face of the square tube and slidably inserted on the frame; a second resistance member slidably inserted and elastically connected to the frame, with the end face corresponding to the resistance seat; and a transmission connection between the first resistance member and the second resistance member for reverse movement.

[0016] The present invention also provides a method for producing a seamless square tube by using a seamless square tube pressing and forming device, which is characterized by comprising the following steps:

[0017] Step 1: reducing the diameter. The steel pipe is successively reduced through each reducing assembly to become a square pipe with rounded edges.

[0018] Step 2: Press the head. The adjusting component adjusts the support top component to insert into the inner end surface of the square tube head. The ejector moves back and forth to eject the corrugated support top component to the middle of the rounded part. At the same time, the side support top component is pulled from the middle of the side wall of the square tube to both sides. The press component is pressed along the axial diameter of the square tube.

[0019] Step 3: intermittent action. The top supporting assembly on the square tube moves with the square tube under the drive of the follow-up adjustment assembly. When the rib top supporting member and the side top supporting member are withdrawn from the square tube, the follow-up adjustment assembly brings the top supporting assembly back to the original position. This reciprocating action is performed until the square tube head is supported to a predetermined depth of the square tube and the pressing is completed. The adjustment assembly withdraws from the top supporting assembly.

[0020] Step 4: Flatten the head, press the square tube head end face into a side ridge shape to abut against the first abutment, the first abutment drives the second abutment to extend, rotate the assembly to make the abutment seat elastically pressed against the second abutment, and cut the remaining material of the square tube by following the movement of the abutment seat;

[0021] Step 5: Tail pressing: When the tail of the square tube is about to reach the press forming assembly under the guidance of the holding assembly, the supporting top of the other group starts to move and gradually extends into the square tube to a predetermined depth, and then gradually leaves the tail of the square tube through the same processing process as the above steps 2 and 3, completing the pressing and forming of the tail of the square tube;

[0022] Step 6: Tail leveling: After the tail of the square tube is pressed and formed, it continues to move to one side of the leveling part. The steering assembly adjusts the positioning and cutting assembly and rotates it to correspond to the tail of the square tube to perform the leveling action.

[0023] The beneficial effects of the present invention are:

[0024] (1) The present invention supports the ends of the square tube during the pressing process by the cooperation between the supporting part and the flattening part. The flattening part completes the cutting of the ends of the square tube while ensuring the regularity of the ends of the square tube. This solves the problem of large excess cutting amount due to the irregular ends of the square tube, which leads to waste of cutting excess material of the square tube steel.

[0025] (2) The present invention achieves the mutual cooperation between the supporting assembly and the follow-up adjustment assembly. When the supporting assembly contacts and supports the square tube, the follow-up adjustment assembly drives the supporting assembly to move. When the supporting assembly leaves the square tube, the follow-up adjustment assembly drives the supporting assembly to return to its original position. This process is repeated, thereby solving the problem of performing intermittent and synchronous supporting actions while continuously pressing the square tube.

[0026] (3) The present invention uses the mutual cooperation between the corrugated support top piece and the ejector piece to enable the square tube with rounded edges after the previous process to be moved toward the support top in the middle of the guide by the corrugated support top piece, thereby solving the technical problem that when the rounded square tube is further pressed into a side corrugated square tube, the side surface of the square tube near the head and tail ends undergoes irregular bending deformation, thereby causing the end of the square tube to be irregularly formed;

[0027] (4) The present invention can effectively reduce the bending allowance of the side wall of the square tube during the supporting process by the mutual cooperation between the corrugated support top piece and the side support top piece, and by pulling the support from the middle of the side wall of the square tube toward the two sides through the side support top piece, so that the side wall allowance is pulled and guided to the two sides to ensure the maximum supporting amount of the corrugated support top piece;

[0028] (5) The present invention uses the mutual cooperation between the positioning component and the abutment seat. When the end of the pressed square tube abuts against the positioning component, the positioning component will feedback the maximum amount of depression along the axial direction of the square tube, and then the movement of the abutment seat is limited by the feedback of the positioning component, thereby controlling the cutting amount of the cutting component on the end of the square tube, thereby solving the problem of material waste caused by excessive cutting residues;

[0029] In summary, the present invention has the advantages of good end forming effect during the square tube pressing process, less end surface leveling and cutting waste, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the supporting top portion and the leveling portion of the present invention;

[0032] Figure 3 It is a structural schematic diagram of the profiled assembly of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the support top of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the follow-up adjustment component of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the roof support assembly of the present invention;

[0036] Figure 7 This is a schematic diagram of the state of the top supporting assembly of the present invention when supporting a square tube;

[0037] Figure 8 For the present invention Figure 6 Sectional view of AA in the middle;

[0038] Fig. 9 For the present invention Figure 6 Cross-sectional view of the middle BB;

[0039] Fig.10 It is a structural schematic diagram of the leveling part of the present invention;

[0040] Fig.11 For the present invention Fig.10 Another side structural schematic diagram of;

[0041] Fig.12 For the present invention Fig.11 Enlarged view of point C in the middle;

[0042] Fig.13 For the present invention Fig.10 Another lateral structural schematic diagram of ;

[0043] Fig.14 It is a schematic diagram of the state before and after the square tube of the present invention is supported;

[0044] Fig.15 Flow chart of the molding method of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0047] Embodiment 1

[0048] like Figure 1 and 2 As shown, a seamless square tube pressing and forming equipment comprises a reducing component 1, which is used to gradually reduce the diameter of a seamless round tube into a plurality of groups of square tubes with rounded edges, and the reducing components 1 are arranged in sequence along the conveying direction; a profiling component 2 is used to press the rounded square tube into a side-corrugated square tube, and the profiling component 2 is arranged at the conveying end of the steel tube of the reducing component 1; it also comprises: a supporting top part 3, which is respectively arranged on both sides of the profiling component 2 for extending into the tube when the ends of the rounded square tube are pressed, pulling the square tube to both sides along the length and width direction, and intermittently supporting the end position of the rounding; a flattening part 4, which is installed on one side of the profiling component 2 for positioning and cutting the end faces of the square tube after pressing with the minimum cutting amount; a holding component 5, which is arranged at the output end of the profiling component 2 so that the moving center of the square tube output through the profiling component 2 remains unchanged.

[0049] Through the above content, it is not difficult to find that in the process of pressing the seamless square tube, the reducing component 1 is used to continuously reduce the diameter of the circular steel tube and cold-press it into a square tube with rounded corners. Specifically, it is first flattened and reduced in diameter by two wheels, and then cold-pressed into a rounded square tube by four wheels. This part is the existing technology and will not be repeated here. In the process of pressing the square tube that has been reduced in diameter into a rounded shape through the profiling component to form a square tube (molded square tube) with a corrugated side, the support top 3 is first extended to the edge of the head to be pressed, while the side of the square tube is pulled from the middle to the rounded parts on both sides, and the top is supported toward the middle position of the rounding, so that the square shape is accurately formed after being stretched, so as to solve the problem that there is no internal support when the square tube is pressed, resulting in the collapse of the side wall of the square tube and the inaccurate end size. Technical problems, at the same time, in the process of gradually moving out the head end, the flattening part 4 will query the minimum depression depth of the end of the precisely pressed square tube, and cut and flatten the head end of the square tube according to the minimum depression depth, so as to minimize the material waste caused by the cutting amount during the trimming of the square tube. When supporting the tail of the square tube, when the square tube passes through the corrugation component 2 and moves to the tail end, the supporting part 3 on the other side of the corrugation component 2 is inserted into the predetermined depth of the tail end of the square tube. As the square tube moves, the inner wall of the square tube is intermittently supported, so that the corrugation component 2 presses the steel tube into a corrugated square tube. Subsequently, the end of the square tube is cut by the flattening part 4. After forming, the end is cut by the flattening part 4, which can effectively reduce the waste of steel caused by excessive cutting residue.

[0050] It is worth noting that when supporting the head of the square tube, as the supporting portion 3 gradually penetrates from the head to the inside, when the supporting portion 3 supports to a predetermined depth, it will quickly withdraw from the inside of the square tube, thereby achieving the support treatment of the predetermined lengths at both ends of the square tube by using the supporting portion 3.

[0051] It is also worth noting that during the entire process of supporting and cutting, after the square tube passes through the profiling component 2, the supporting and cutting actions at the tail end will be completed while the center of the square tube is always kept in place by the holding component 5.

[0052] It should be added that Figure 3 As shown, the profiling assembly 2 includes a longitudinal pressing wheel 21, a transverse pressing wheel 22 and a transmission bracket 23 for installing and transmitting power to the longitudinal pressing wheel 21 and the transverse pressing wheel 22; the profiling assembly 2 in this embodiment is the same as the four-wheel cold pressing mechanism for pressing a corrugated square tube in the prior art, and will not be described in detail here, while maintaining the component 5 as a four-wheel transmission structure with the same structural setting as the profiling assembly 2.

[0053] like Figure 4As shown, the supporting top portion 3 includes: a supporting top component 31 that is intermittent, pulled toward both sides of the length and width direction of the square tube, and supports the top toward the middle of the rounded square tube; a follow-up adjustment component 32, which enables the supporting top component 31 to move with the square tube and enables the supporting top component 31 that leaves the square tube to return to its original position. The follow-up adjustment component 32 is installed on one side of the supporting top component 31; and an adjusting component 33, which enables the power end of the adjusting component 33 that withdraws the supporting top component 31 and the follow-up adjustment component 32 to be connected to the follow-up adjustment component 32.

[0054] In the present embodiment, when the top supporting component 31 is performing the top supporting processing on the rounding of the square tube and the side wall when the profiling component 2 is pressing, when the top supporting component 31 contacts the moving square tube, the top supporting component 31 will move a short distance with the square tube under the drive of the follow-up adjustment component 32, and then when the top supporting component 31 intermittently detaches from the square tube, the follow-up adjustment component 32 carries the top supporting component 31 back to the original position to continue supporting the length of the partial area that has not been supported, thereby realizing continuous top supporting processing on the moving square tube, and at the end of the top supporting, the adjustment component 33 will adjust the top supporting component 31 located at the head and tail of the square tube to withdraw from the moving area of ​​the square tube as needed.

[0055] It is worth noting that the adjusting component 33 includes a first adjusting member 331 arranged along the conveying direction of the steel pipe and with a power end connected to the follow-up adjusting component 32, a second adjusting member 332 with a power end installed on the first adjusting member 331 and used to lift the first adjusting member 331, and an adjusting bracket 333 for installing the second adjusting member 332. The first adjusting member 331 and the second adjusting member 332 are preferably cylinders.

[0056] like Figure 6 As shown, the top support assembly 31 includes: a machine base 311; a ribbed top member 312 that is slidably inserted and elastically connected to the machine base 311 and corresponds to the movement of the end point of the square tube rounding; a plurality of groups of side top members 313 that are slidably inserted and elastically connected to the machine base 311 and located between adjacent ribbed top members 312; and an ejection member 314 installed on the machine base 311 to eject the ribbed top member 312 and the side top member 313 synchronously.

[0057] In this embodiment, when the top supporting assembly 31 is performing the top supporting action, the ejection piece 314 will move back and forth, causing the rib top supporting piece 312 and the side top supporting piece 313 to be reciprocatingly ejected outward to form a rib-shaped square tube, and then the square tube is withdrawn to ensure the continuous output of the steel tube and the continuous top supporting processing.

[0058] like Figure 7 As shown, the side support top members 313 on the same plane are symmetrically inserted on the machine base 311, and the inclination angle increases gradually from the middle to one side.

[0059] In this embodiment, when the side support top piece 313 is pushed out to support and straighten the side wall of the other pipe, the side support top piece 313 is arranged obliquely toward both sides and is pushed out by the power of the ejection piece 314, so that when it contacts the inner wall of the pipe, it will be gradually pulled toward both sides.

[0060] In order to return the ribbed top member 312 and the side-supporting top member 313 when the ejection member 314 is powered off, the ribbed top member 312 is connected to the base 311 via a first spring, and the side-supporting top member 313 is connected to the base 311 via a second spring.

[0061] like Figure 8 and 9 As shown, the ejector 314 includes: a guide seat 3141 slidably inserted on the machine base 311; and an ejector power member 3142 driving the guide seat 3141 to move back and forth; the guide seat 3141 is provided with a first guide channel 31411 corresponding to the rib support ejector 312; the guide seat 3141 is provided with a second guide channel 31412 corresponding to the side support ejector 313.

[0062] In this embodiment, the guide seat 3141 is driven to move back and forth along the axial direction of the square tube by the ejection power member 3142, which is preferably a cylinder, so that the corrugated support top member 312 and the side support top member 313 move back and forth in the first guide channel 31411 and the second guide channel 31412, so that the corrugated support top member 312 and the side support top member 313 are pushed outward to the surface of the square tube and then withdrawn under the guidance of the first guide channel 31411 and the second guide channel 31412, and the reciprocating action is repeated.

[0063] like Figure 5 As shown, the follow-up adjustment component 32 includes: an adjustment seat 321 slidably connected to the machine base 311; a power roller 322 arranged on the adjustment seat 321, and a guide track 3221 symmetrically connected to the power roller 322; and a guide member 323 with one end connected to the machine base 311 and the other end inserted into the guide track 3221.

[0064] In this embodiment, the power roller 322 is driven to rotate by the power of a servo motor 324 which is preferably installed on the adjustment seat 321, so that the guide track 3221 is also continuously rotated. During the rotation, the guide member 323 is moved along the guide track 3221, so that the rib support top member 312 and the side support top member 313 that are in contact with the square tube move along with the square tube, and when the rib support top member 312 and the side support top member 313 are withdrawn from the surface of the square tube, the guide member 323 moves back in the guide track 3221, so that the rib support top member 312 and the side support top member 313 return to their original positions.

[0065] Embodiment 2

[0066] like Fig.10 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0067] The leveling part 4 includes: a positioning and cutting component 41 for positioning and pressing the maximum depth of the end face of the square tube and cutting after corresponding adjustment of the cutting position; and a steering component 42, the power end of the steering component 42 arranged corresponding to the first and tail end faces of the square tube respectively after adjusting the positioning and cutting component 41 is connected to the positioning and cutting component 41.

[0068] In this embodiment, when the flattening part 4 processes the surface of the square tube end after pressing, when processing the head of the square tube, that is, after the head area of ​​the square tube is pressed, as the square tube gradually moves to the positioning and cutting component 41, the positioning and cutting component 41 locates and finds the deepest position of the end surface concave toward the head side along the axial direction of the square tube, and then confirms the axial length of the excess material to be cut according to the deepest position, thereby ensuring the accuracy of the excess material cutting and reducing material waste.

[0069] like Fig.10 and 13 As shown, the steering assembly 42 includes a steering seat 421 for installing the positioning and cutting assembly 41, a lifting and adjusting member 422 arranged on the top of the steering seat 421 and used to drive the steering seat 421 to rise and fall, a rotating motor 423 whose power end is connected to the lifting and adjusting member 422 and used to drive the steering seat 421 to rotate, and a conveying member 424 installed on one side of the top of the adjusting bracket 333 and used to drive the steering seat 421 to contact the end of the square tube. The conveying member 424 and the lifting and adjusting member 422 are preferably cylinders, and the rotating motor 423 is preferably a servo motor.

[0070] In order to ensure that the positioning and cutting assembly 41 can be adaptively set on the end surface of the square tube for locking, such as Fig.13 As shown, a sliding groove 4211 for the positioning and cutting assembly 41 to move back and forth is provided at the bottom of the steering seat 421, and a third spring 4145 is provided in the sliding groove 4211 for elastically connecting the positioning and cutting assembly 41 to the inner wall of the sliding groove 4211, and a locking power member 425 for pressing and locking the positioning and cutting assembly 41 is installed on one side of the steering seat 421. The locking power member 425 is preferably a cylinder, that is, when the positioning and cutting assembly 41 adaptively moves to the corresponding position in the sliding groove 4211, the locking power member 425 is actuated to press on the positioning and cutting assembly 41 to achieve position locking of the positioning and cutting assembly 41.

[0071] like Fig.10 As shown, the positioning and cutting assembly 41 includes: a frame 411; an abutment seat 412 disposed on one side of the frame 411 and elastically connected to the steering assembly 42; a positioning assembly 413, which feeds back the shape of the end face of the square tube to the abutment seat 412 and positions the abutment seat 412 to the deepest recessed position of the end face of the square tube, and is slidably disposed on the frame 411; and a cutting assembly 414 installed on the abutment seat 412 and used for cutting the end face excess material of the square tube.

[0072] In this embodiment, when the end face of the square tube contacts the positioning assembly 413, the deepest depression will be returned to the abutment seat 412, thereby adjusting the cutting position of the cutting assembly 414, and then the cutting assembly 414 moves to the square tube to cut it.

[0073] like Fig.13 As shown, the cutting assembly 414 includes a cutting disk 4141, a cutting power motor 4142 for driving the cutting disk 4141 to rotate, a lifting power member 4143 whose power end is installed on the cutting power motor 4142 and is used to drive the cutting disk 4141 to rise and fall for cutting, and a cutting conveying member 4144 which is slidably arranged in the sliding groove 4211 and is connected to the abutment seat 412 and is used to drive the cutting disk 4141 to move toward the direction of the square tube. The cutting conveying member 4144 and the lifting power member 4143 are preferably cylinders, and the cutting power motor 4142 is preferably a servo motor.

[0074] like Fig.12 As shown, the positioning assembly 413 includes: a first resistance member 4131 which is circumferentially arranged along the end face of the square tube and slidably inserted on the frame 411; a second resistance member 4132 which is slidably inserted and elastically connected to the frame 411 and whose end face corresponds to the resistance seat 412; and a transmission connection between the first resistance member 4131 and the second resistance member 4132 for reverse movement.

[0075] In this embodiment, through the mutual transmission between the first resistance member 4131 and the second resistance member 4132, the depth of the first resistance member 4131 contacting the end of the square tube can be transmitted to the second resistance member 4132 to the maximum extent, so that when the resistance seat 412 contacts the second resistance member 4132, it can be limited by the extended second resistance member 4132, thereby determining the stop position of the resistance seat 412 and completing the cutting action through the cutting assembly 414.

[0076] It is worth noting that when the resistance seat 412 moves toward the second resistance member 4132, the power of the conveying member 424 will cause the resistance member 412 to approach and contact the second resistance member 4132, and under the elastic action of the third spring 4145, the resistance member 412 adaptively rests on the second resistance member 4132 that extends the farthest, thereby achieving the positioning of the cutting assembly 414.

[0077] It is also worth noting that in order to ensure transmission return between the first resistance member 4131 and the second resistance member 4132, the first resistance member 4131 and the second resistance member 4132 are preferably racks, and the first resistance member 4131 and the second resistance member 4132 are meshed and transmitted through the gear 4133.

[0078] Furthermore, in order to ensure that the first resistance member 4131 can elastically extend out of the frame 411 in the initial state, the second resistance member 4132 is installed with an insertion rod 41321 passing through the frame 411 and a fourth spring 41322 elastically connecting the second resistance member 4132 to the frame 411.

[0079] Working steps

[0080] like Fig.15 As shown, a method for producing a seamless square tube by a seamless square tube pressing and forming device comprises the following steps:

[0081] Step 1: reducing the diameter. The steel pipe is successively reduced through each reducing assembly 1 to become a square pipe with rounded edges.

[0082] Step 2: Press the head. The adjusting component 33 adjusts the supporting top component 31 to insert into the inner end surface of the square tube head. The ejecting member 314 reciprocates to eject the corrugated supporting top component 312 to the middle of the rounded part. At the same time, the side supporting top component 313 is pulled from the middle of the side wall of the square tube to both sides. The pressing component 2 is pressed along the axial diameter of the square tube.

[0083] Step 3: intermittent action. The supporting assembly 31 on the square tube moves with the square tube under the drive of the follow-up adjustment assembly 32. When the rib supporting member 312 and the side supporting member 313 are withdrawn from the square tube, the follow-up adjustment assembly 32 brings the supporting assembly 31 back to the original position. The reciprocating action is repeated until the square tube head is supported to a predetermined depth of the square tube and the pressing is completed. The adjustment assembly 33 withdraws from the supporting assembly 31.

[0084] Step 4: The head is flattened, and the end face of the square tube head pressed into a side rib shape abuts against the first abutment 4131. The first abutment 4131 drives the second abutment 4132 to extend. The rotating assembly 42 makes the abutment seat 412 elastically press against the second abutment 4132. The cutting assembly 414 moves with the abutment seat 412 to cut the remaining material of the square tube.

[0085] Step 5: Tail pressing: When the tail of the square tube is about to reach the pressing component 2 under the guidance of the holding component 5, the supporting top portion 3 of another group starts to move and gradually extends into the square tube to a predetermined depth, and then gradually leaves the tail of the square tube through the same processing process as the above steps 2 and 3, completing the pressing and forming of the tail of the square tube;

[0086] Step 6: Tail leveling: After the tail of the square tube is pressed and formed, it continues to move to one side of the leveling part 4. The steering component 42 adjusts the positioning and cutting component 41 to rotate to correspond to the tail of the square tube to perform the leveling action.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seamless square tube pressing and forming device, comprising: A diameter reducing assembly, used for gradually reducing the diameter of a seamless round tube into a square tube with rounded edges. Several groups of the diameter reducing assemblies are arranged in sequence along the conveying direction; as well as A profiling component, which presses the rounded square tube into a side corrugated square tube, and is arranged at the conveying end of the steel tube by the diameter reducing component; It is characterized by further comprising: The supporting top parts are arranged on both sides of the profiling assembly respectively, and are used to extend into the tube when pressing the ends of the rounded square tube, pull the square tube to both sides along the length and width direction, and intermittently support the end position of the rounding; A flattening part, which is installed on one side of the profiling component to perform minimum cutting on the front and rear end surfaces of the pressed tube and then position and cut. A holding component, which keeps the moving center of the square tube output through the profiling component unchanged, and is arranged at the output end of the profiling component; The supporting top portion comprises: A top supporting component that is intermittent, pulls toward both sides of the length and width direction of the square tube, and supports the top toward the middle of the rounded square tube; A follow-up adjustment component is installed on one side of the top supporting component, which enables the top supporting component to follow the square tube to move and enables the top supporting component to return to its original position after leaving the square tube; and An adjusting component, wherein the power end of the adjusting component that enables the top supporting component and the follow-up adjusting component to be evacuated is connected to the follow-up adjusting component; The top support assembly comprises: Machine base; A rib support top member which is slidably inserted and elastically connected to the machine base and corresponds to the movement of the rounding end point of the square tube; A plurality of groups of side support top members are slidably inserted, elastically connected to the machine base and located between adjacent rib support top members; and An ejector installed on the machine base to eject the rib support top piece and the side support top piece synchronously; The side support top members on the same plane are symmetrically inserted on the machine base, and the inclination angle increases gradually from the middle to one side.

2. A seamless square tube pressing and forming device according to claim 1, characterized in that: The ejector comprises: A guide seat slidably inserted on the machine base; and An ejection power member driving the guide seat to move back and forth; The guide seat is provided with a first guide channel corresponding to the rib support top member; The guide seat is provided with a second guide channel corresponding to the side support top piece.

3. The seamless square tube pressing and forming equipment according to claim 1, characterized in that: The follow-up adjustment component comprises: An adjustment seat slidably connected to the machine base; A power roller is arranged on the adjustment seat, and the power roller is symmetrically connected with a guide track; and A guide member having one end connected to the machine base and the other end inserted into the guide track.

4. A seamless square tube pressing and forming device according to any one of claims 1 to 3, characterized in that: The flattening section comprises: A positioning and cutting component for positioning and pressing the maximum depth of the concave end surface of the rear tube, and adjusting the cutting position accordingly before cutting; and The steering assembly adjusts the positioning and cutting assembly, and the power end of the steering assembly arranged corresponding to the first and tail end surfaces of the square tube is connected to the positioning and cutting assembly.

5. A seamless square tube pressing and forming device according to claim 4, characterized in that: The positioning and removal assembly comprises: frame; An abutment seat provided on one side of the frame and elastically connected to the steering assembly; A positioning component, which feeds back the shape of the square tube end surface to the abutment seat and positions the abutment seat to the deepest recessed position of the square tube end surface, and is slidably disposed on the frame; and A cutting assembly is installed on the abutment seat and is used for cutting the end face excess material of the opposite tube.

6. A seamless square tube pressing and forming device according to claim 5, characterized in that: The positioning component comprises: A first abutment member is arranged along the circumferential direction of the end surface of the square tube and is slidably inserted on the frame; A second abutment member which is slidably inserted and elastically connected to the frame and has an end surface corresponding to the abutment seat; The first abutment member and the second abutment member are in transmission connection for reverse movement.

7. The method for producing seamless square tubes by using a seamless square tube pressing and forming device according to claim 6, characterized in that: The following steps are involved: Step 1: reducing the diameter. The steel pipe is successively reduced through each reducing assembly to become a square pipe with rounded edges. Step 2: Press the head. The adjusting component adjusts the support top component to insert into the inner end surface of the square tube head. The ejector moves back and forth to eject the corrugated support top component to the middle of the rounded part. At the same time, the side support top component is pulled from the middle of the side wall of the square tube to both sides. The press component is pressed along the axial diameter of the square tube. Step 3: intermittent action. The top supporting assembly on the square tube moves with the square tube under the drive of the follow-up adjustment assembly. When the rib top supporting member and the side top supporting member are withdrawn from the square tube, the follow-up adjustment assembly brings the top supporting assembly back to the original position. This reciprocating action is performed until the square tube head is supported to a predetermined depth of the square tube and the pressing is completed. The adjustment assembly withdraws from the top supporting assembly. Step 4: Flatten the head, press the square tube head end face into a side ridge shape to abut against the first abutment, the first abutment drives the second abutment to extend, rotate the assembly to make the abutment seat elastically pressed against the second abutment, and cut the remaining material of the square tube by following the movement of the abutment seat; Step 5: Tail pressing: When the tail of the square tube is about to reach the press forming assembly under the guidance of the holding assembly, the supporting top of the other group starts to move and gradually extends into the square tube to a predetermined depth, and then gradually leaves the tail of the square tube through the same processing process as the above steps 2 and 3, completing the pressing and forming of the tail of the square tube; Step 6: Tail leveling: After the tail of the square tube is pressed and formed, it continues to move to one side of the leveling part. The steering assembly adjusts the positioning and cutting assembly and rotates it to correspond to the tail of the square tube to perform the leveling action.

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