Rectangular steel pipe shaping device

Abstract

The utility model relates to the technical field of steel pipe shaping equipment, in particular to a rectangular steel pipe shaping device which comprises a machine body, a vertical shaping mechanism fixed to the machine body, a horizontal shaping mechanism fixed to the machine body and a speed reducer used for driving the vertical shaping mechanism to operate. The vertical shaping mechanism comprises an upper roller wheel and a lower roller wheel which are symmetrically arranged up and down, the horizontal shaping mechanism comprises a horizontal roller wheel which is horizontally and symmetrically arranged, V-shaped grooves are formed in the centers of the upper roller wheel, the lower roller wheel and the horizontal roller wheel, and a pipe forming space is defined by the V-shaped grooves; the multiple sets of vertical shaping mechanisms and the multiple sets of horizontal shaping mechanisms are arranged on the machine body at intervals. By means of the design of the multiple sets of symmetrical shaping mechanisms and the roller V-shaped grooves, uniform stress and accurate positioning of the steel pipe are achieved, deformation is avoided, straightness is guaranteed, forming precision is improved, and the shaping defect of a traditional device is overcome.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe shaping equipment, specifically a rectangular steel pipe shaping device. Background Technology

[0002] In modern industrial production, rectangular steel pipes are widely used in many fields such as building structures, machinery manufacturing, and transportation due to their excellent structural strength and stability. The quality and precision of rectangular steel pipes play a crucial role in the performance and safety of the final product. Therefore, during the production process, the steel pipes need to be shaped to extrude their shape into specified dimensions to meet the requirements of practical applications.

[0003] Currently, there are various types of rectangular steel tube forming devices on the market. For example, the existing technology "rectangular tube forming device" (announcement number: CN214160955U) forms a forming space by setting a first roll, two second rolls, and a third roll. The first and third rolls are staggered, as are the two second rolls. Therefore, six third drive mechanisms can be activated to control the movement of the lower, middle, and upper roller shafts, increasing or decreasing the size of the forming space. This is suitable for forming rectangular tubes of different sizes and effectively reduces production costs. However, the existing technology still has the following technical problems:

[0004] 1. In the existing technology, the rollers are all staggered in space. During the process of the tube being squeezed by the rollers, the contact points with individual rollers will be subjected to uneven stress. This will cause local stress concentration on the surface of the tube during extrusion molding, resulting in surface deformation and making it difficult to control the dimensional accuracy after molding.

[0005] 2. During long-term production, the rollers and the pipe are in contact with each other, and the forming surface of the rollers will wear. In particular, the main drive roller bears the active rolling force and is subjected to a large load, making it more likely that the forming surface will wear into an inclined surface, resulting in a large deviation in the shape of the pipe after shaping. Utility Model Content

[0006] This invention provides a rectangular steel pipe forming device, which can solve the problem that existing equipment easily leads to uneven stress at the pipe contact points during the pipe forming process, causing surface deformation and thus reducing the forming accuracy of the pipe.

[0007] This application provides the following technical solution: a rectangular steel pipe shaping device, including a body, a vertical shaping mechanism fixed on the body, a horizontal shaping mechanism fixed on the body, and a reducer for driving the vertical shaping mechanism.

[0008] The vertical forming mechanism includes an upper roller and a lower roller arranged symmetrically at the top and bottom. The horizontal forming mechanism includes a horizontal roller arranged symmetrically at the bottom and top. The upper roller, the lower roller, and the horizontal roller are provided with V-shaped grooves at their centers, and the V-shaped grooves form a tube forming space. The vertical forming mechanism and the horizontal forming mechanism are provided in multiple sets and are spaced apart on the machine body.

[0009] Beneficial effects:

[0010] 1. This solution sets up multiple sets of vertical and horizontal forming mechanisms, arranged symmetrically both vertically and horizontally. This ensures that during the forming process, the rectangular steel pipe wall is subjected to symmetrical and uniform extrusion force on all four sides as it passes through each roller. Compared to traditional single-point or localized extrusion methods, this symmetrical force application effectively ensures the uniformity of stress on the pipe, prevents pipe deformation, and improves the dimensional accuracy of the formed pipe. At the same time, the multiple sets of vertical and horizontal forming mechanisms, spaced apart on the machine body, can repeatedly and continuously extrude and form the pipe, ensuring the straightness of even ultra-long pipes and effectively improving the forming accuracy.

[0011] 2. The V-shaped grooves at the centers of the upper roller, lower roller, and horizontal roller form a forming space for the tube. This space ensures stable positioning of the tube as it passes through, preventing displacement during the forming process. It also ensures more uniform contact between the rollers and the tube, reducing localized stress concentration. The tube forming space enclosed by the V-shaped grooves allows for precise, all-around shaping of the tube, significantly improving forming accuracy and overcoming the poor forming results caused by inaccurate positioning and insufficient contact in traditional devices.

[0012] Furthermore, the horizontal shaping mechanism includes horizontal positioning seats symmetrically fixed on the machine body, a horizontal roller shaft fixed on the horizontal roller, the lower end of the horizontal roller shaft being slidably connected to the horizontal positioning seat, and a horizontal rotating shaft being threadedly connected to the lower end of the horizontal roller shaft. The two ends of the horizontal rotating shaft are rotatably connected to the horizontal positioning seat, and a horizontal locking nut is provided at one end of the horizontal rotating shaft.

[0013] Beneficial effects: Through the threaded drive between the horizontal rotating shaft and the horizontal roller shaft, the operator can rotate the horizontal rotating shaft to drive the horizontal rollers to slide along the horizontal positioning seat, achieving precise adjustment of the spacing between the horizontal rollers. This design allows the equipment to quickly adjust the shape of the tube forming space, which is beneficial for controlling the forming dimensions and improving the forming accuracy.

[0014] Furthermore, the vertical shaping mechanism also includes vertical positioning seats symmetrically fixed on the machine body, an upper slider and a lower slider slidably connected to the vertical positioning seats. The two ends of the upper roller are fixed with an upper roller shaft, which is rotatably connected inside the upper slider. One end of the upper roller shaft is connected to an upper coupling, and the end of the upper coupling away from the upper roller shaft is connected to the main shaft of the reducer. The two ends of the lower roller are fixed with a lower roller shaft, which is rotatably connected inside the lower slider. One end of the lower roller shaft is connected to a lower coupling, and the end of the lower coupling away from the lower roller shaft is connected to the main shaft of the reducer.

[0015] Beneficial effects: By using symmetrically fixed vertical positioning seats and slidingly connected upper and lower sliders, precise alignment of the upper and lower rollers is achieved. A reducer drives the upper and lower roller shafts to rotate, thereby providing conveying power for the pipe and ensuring that the pipe can travel in one direction. During the travel, shaping is achieved. Moreover, the symmetrical structure ensures that the pipe is subjected to uniform rolling force in the vertical direction, avoiding bending or warping deformation caused by unilateral force. From a mechanical structure perspective, it eliminates the problem of uneven force caused by installation deviation in traditional devices.

[0016] Furthermore, both the upper and lower couplings are universal couplings.

[0017] Beneficial effects: Universal couplings allow for a certain angular deviation between the upper and lower roller shafts and the reducer spindle, maintaining reliable power transmission even when components shift slightly during equipment installation, commissioning, or long-term operation. This characteristic avoids problems such as transmission jamming and accelerated component wear caused by the stringent coaxiality requirements of traditional rigid couplings, ensuring that the roller speeds remain synchronized throughout the forming process and eliminating the risk of uneven stress on the pipes due to poor power transmission.

[0018] Furthermore, the vertical positioning seat is provided with a spacing adjustment mechanism, which includes a bearing fixed on the upper slider and a vertical rotating shaft threadedly connected to the vertical positioning seat. The lower end of the vertical rotating shaft is fixed in the inner ring of the bearing, and the upper end of the vertical rotating shaft extends to the top of the vertical positioning seat. A vertical locking nut is provided at the upper end of the vertical rotating shaft.

[0019] Beneficial effects: By rotating the vertical shaft to drive the upper slider to slide along the vertical positioning seat, the distance between the upper and lower rollers can be precisely adjusted, allowing the equipment to quickly adjust the shape of the tube forming space without disassembling the core components. This is beneficial for controlling the forming size and improving the forming accuracy.

[0020] Furthermore, the vertical shaping mechanism also includes a shape adjustment mechanism, which includes a lower wedge block slidably connected to the vertical positioning seat, an upper wedge block slidably connected to the vertical positioning seat, a rotating rod threadedly connected to the lower wedge block, and a baffle fixed to the side wall of the vertical positioning seat. The vertical positioning seat is provided with a wedge groove, the lower wedge block is slidably connected in the wedge groove, and the two ends of the rotating rod are respectively rotatably connected to the vertical positioning seat and the baffle. The top of the upper wedge block is in contact with the lower slider.

[0021] Beneficial effects: By rotating the rotating rod, the lower wedge block slides within the wedge groove. The inclination angle of the wedge surface converts the horizontal displacement into the vertical displacement of the upper wedge block, thereby fine-tuning the position of the lower slider (and lower roller). This design can precisely compensate for asymmetric deformation (such as unilateral tilt) caused by wear on the V-groove surface of the roller after long-term use, and accurately adjust the shape of the forming space enclosed by the V-groove. It breaks through the limitation of traditional symmetrical forming mechanisms that can only adjust the whole, and significantly improves the ability to correct the forming space enclosed by the roller V-groove. Attached Figure Description

[0022] Figure 1 This is a front view of the present invention.

[0023] Figure 2 for Figure 1 A front view of the horizontal shaping mechanism after removing the vertical shaping mechanism.

[0024] Figure 3 This is a top view of the present invention.

[0025] Figure 4 for Figure 1 A magnified view of A in the middle. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method:

[0027] The markings in the accompanying drawings include: reducer 1, upper coupling 2, upper roller shaft 3, vertical positioning seat 4, vertical slide 401, vertical locking nut 5, vertical rotating shaft 6, bearing cover plate 7, bearing 8, upper roller 9, upper slider 10, lower roller shaft 11, lower slider 12, lower coupling 13, lower roller 14, machine body 15, horizontal rotating shaft 16, horizontal locking nut 17, horizontal positioning seat 18, horizontal slide 19, horizontal roller shaft 20, horizontal roller 21, wedge groove 22, rotating rod 23, upper wedge block 24, lower wedge block 25, baffle 26.

[0028] Example 1

[0029] like Figures 1 to 3As shown, a rectangular steel pipe shaping device includes a body 15, a vertical shaping mechanism fixed on the body 15, a horizontal shaping mechanism fixed on the body 15, and a reducer 1 for driving the vertical shaping mechanism.

[0030] like Figure 1 As shown, the vertical shaping mechanism includes an L-shaped vertical positioning seat 4 symmetrically fixed on the machine body 15, an upper slider 10 and a lower slider 12 slidably connected on the vertical positioning seat 4, and an upper roller 9 and a lower roller 14 located between the vertical positioning seats 4. The upper roller 9 and the lower roller 14 are symmetrically arranged vertically. The two ends of the upper roller 9 are fixed with an upper roller shaft 3, and the two ends of the lower roller 14 are fixed with a lower roller shaft 11. The upper roller shaft 3 and the lower roller shaft 11 are rotatably connected in the upper slider 10 and the lower slider 12, respectively. The vertical positioning seat 4 is provided with a vertical sliding groove 401 that runs through the left and right sides. The upper slider 10 and the lower slider 12 are both located in the vertical sliding groove 401.

[0031] Figure 1 The upper roller shaft 3 and the lower roller shaft 11 on the left side are respectively connected to the upper coupling 2 and the lower coupling 13. One end of the upper coupling 2 and the lower coupling 13 is connected to the main shaft of the reducer 1. The upper coupling 2 and the lower coupling 13 are both universal couplings. The reducer 1 can drive the upper roller shaft 3 and the lower roller shaft 11 to rotate, thereby driving the upper roller 9 and the lower roller 14 to roll against each other.

[0032] A spacing adjustment mechanism is provided on the vertical positioning seat 4. The spacing adjustment mechanism includes a bearing 8 fixed on the upper slider 10 and a vertical rotating shaft 6 threadedly connected to the vertical positioning seat 4. The outer ring of the bearing 8 is interference-fitted in the mounting groove of the upper slider 10, and the lower end of the vertical rotating shaft 6 is interference-fitted in the inner ring of the bearing 8. A bearing cover plate 7 is also screwed to the upper slider 10. The upper end of the vertical rotating shaft 6 extends to the top of the vertical positioning seat 4. A vertical locking nut 5 is provided at the upper end of the vertical rotating shaft 6. The top plate of the vertical rotating shaft 6 is hexagonal. By turning the hexagon on the vertical rotating shaft 6, the vertical rotating shaft 6 can be moved up and down, thereby driving the upper slider 10 to move up and down.

[0033] like Figure 2As shown, the horizontal shaping mechanism includes a horizontal positioning seat 18 symmetrically fixed on the machine body 15. A horizontal groove 19 is provided on the horizontal positioning seat 18. A horizontal rotating shaft 16 is provided in the horizontal groove 19. Both ends of the horizontal rotating shaft 16 are rotatably connected to the horizontal positioning seat 18. A horizontal locking nut 17 is provided at one end of the horizontal rotating shaft 16 that extends out of the horizontal positioning seat 18. The end of the horizontal rotating shaft 16 near the horizontal locking nut 17 is set as a hexagonal structure. A horizontal roller shaft 20 is threadedly connected to the rod of the horizontal rotating shaft 16. A horizontal roller is fixed on the horizontal roller shaft 20. The horizontal rollers are symmetrically arranged. The lower end of the horizontal roller shaft 20 can slide in the horizontal groove 19. By rotating the horizontal rotating shaft 16, the horizontal roller shaft 20 can be driven to move laterally, thereby driving the horizontal rollers to move laterally.

[0034] The upper roller 9, lower roller 14, and horizontal roller have V-shaped grooves at their centers, which form the tube forming space. Figure 3 As shown, there are multiple sets of vertical and horizontal shaping mechanisms, which are spaced apart on the body 15.

[0035] The usage method of this solution is as follows:

[0036] The pipe, which has been welded and formed in the previous process, is fed into the V-groove between the upper roller 9 and the lower roller 14. Driven by the reducer 1, the upper roller 9 and the lower roller 14 roll against each other, extruding the pipe and conveying it along the production line. After passing through the first set of vertical shaping mechanisms, the pipe enters the horizontal rollers of the first set of horizontal shaping mechanisms and is extruded horizontally. Then it enters the subsequent vertical and horizontal shaping mechanisms in sequence until it passes through all the shaping mechanisms and enters the next process.

[0037] To adjust the distance between the upper roller 9 and the lower roller 14, a wrench can be used to turn the hexagonal structure above the vertical rotating shaft 6 to control the vertical movement of the vertical rotating shaft 6 and drive the upper slider 10 to move, thereby controlling the distance between the upper roller 9 and the lower roller 14. Finally, the vertical locking nut 5 is used to tighten it. Similarly, the distance between the horizontal rollers can be controlled by adjusting the hexagonal structure at the end of the horizontal roller shaft 20 with a wrench; this will not be elaborated further here.

[0038] Example 2

[0039] The difference between this embodiment and Embodiment 1 is that the vertical shaping mechanism also includes a shape adjustment mechanism, such as... Figure 4As shown, the shape adjustment mechanism includes a lower wedge block 25 slidably connected to the vertical positioning seat 4, an upper wedge block 24 slidably connected to the vertical positioning seat 4, a rotating rod 23 threadedly connected to the lower wedge block 25, and a baffle 26 fixed to the side wall of the vertical positioning seat 4. The vertical positioning seat 4 is provided with a wedge groove 22, and the lower wedge block 25 is slidably connected in the wedge groove 22. The two ends of the rotating rod 23 are respectively rotatably connected to the vertical positioning seat 4 and the baffle 26. The top of the upper wedge block 24 contacts the lower slider 12. For ease of demonstration, Figure 1 Only the shape adjustment mechanism on the right side is drawn.

[0040] By rotation Figure 4 The handle at the right end of the rotating rod 23 drives the lower wedge block 25 to slide within the wedge groove 22 when the rod 23 rotates. The wedge angle of the lower wedge block 25 converts the horizontal displacement into the vertical displacement of the upper wedge block 24, thereby lifting the bottom of the lower slider 12 and fine-tuning the position of the lower slider 12 (and the lower roller 14). This design can precisely compensate for asymmetric deformation (such as unilateral tilt) caused by wear on the V-groove surface of the roller after long-term use. It allows the entire lower roller 14 to finely adjust its tilt, thus adjusting the shape of the molding space enclosed by the V-groove. Since the upper and lower rollers 14 are actively driven and bear a large load, the surface of the V-groove is more prone to uneven wear, such as a sloping surface. Fine-tuning the tilt of the lower roller 14 corrects the molding space enclosed by the V-groove, improving the ability to correct the molding space enclosed by the roller's V-groove.

[0041] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A rectangular steel pipe shaping device, characterized in that: It includes a machine body, a vertical shaping mechanism fixed on the machine body, a horizontal shaping mechanism fixed on the machine body, and a speed reducer for driving the vertical shaping mechanism. The vertical forming mechanism includes an upper roller and a lower roller arranged symmetrically at the top and bottom. The horizontal forming mechanism includes a horizontal roller arranged symmetrically at the bottom and top. The upper roller, the lower roller, and the horizontal roller are provided with V-shaped grooves at their centers, and the V-shaped grooves form a tube forming space. The vertical forming mechanism and the horizontal forming mechanism are provided in multiple sets and are spaced apart on the machine body.

2. The rectangular steel pipe shaping device according to claim 1, characterized in that: The horizontal shaping mechanism includes horizontal positioning seats symmetrically fixed on the machine body, a horizontal roller shaft fixed on the horizontal roller, the lower end of the horizontal roller shaft being slidably connected to the horizontal positioning seat, and a horizontal rotating shaft being threadedly connected to the lower end of the horizontal roller shaft. The two ends of the horizontal rotating shaft are rotatably connected to the horizontal positioning seat, and a horizontal locking nut is provided at one end of the horizontal rotating shaft.

3. The rectangular steel pipe shaping device according to claim 2, characterized in that: The vertical shaping mechanism also includes vertical positioning seats symmetrically fixed on the machine body, an upper slider and a lower slider slidably connected to the vertical positioning seats. The two ends of the upper roller are fixed with an upper roller shaft, which is rotatably connected to the upper slider. One end of the upper roller shaft is connected to an upper coupling, and the end of the upper coupling away from the upper roller shaft is connected to the main shaft of the reducer. The two ends of the lower roller are fixed with a lower roller shaft, which is rotatably connected to the lower slider. One end of the lower roller shaft is connected to a lower coupling, and the end of the lower coupling away from the lower roller shaft is connected to the main shaft of the reducer.

4. The rectangular steel pipe shaping device according to claim 3, characterized in that: Both the upper and lower couplings are universal couplings.

5. A rectangular steel pipe shaping device according to claim 4, characterized in that: The vertical positioning seat is provided with a spacing adjustment mechanism, which includes a bearing fixed on the upper slider and a vertical rotating shaft threadedly connected to the vertical positioning seat. The lower end of the vertical rotating shaft is fixed in the inner ring of the bearing, and the upper end of the vertical rotating shaft extends to the top of the vertical positioning seat. A vertical locking nut is provided at the upper end of the vertical rotating shaft.

6. The rectangular steel pipe shaping device according to claim 3, characterized in that: The vertical shaping mechanism also includes a shape adjustment mechanism, which includes a lower wedge block slidably connected to the vertical positioning seat, an upper wedge block slidably connected to the vertical positioning seat, a rotating rod threadedly connected to the lower wedge block, and a baffle fixed to the side wall of the vertical positioning seat. The vertical positioning seat is provided with a wedge groove, the lower wedge block is slidably connected in the wedge groove, and the two ends of the rotating rod are respectively rotatably connected to the vertical positioning seat and the baffle. The top of the upper wedge block is in contact with the lower sliding block.

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