A punching and drawing integrated device for steel pipes

Abstract

This utility model relates to the field of steel pipe processing technology, specifically to an integrated punching and drawing device for steel pipes. It includes a worktable with a clamping assembly fixedly installed in the middle. The clamping assembly includes a first cylinder, which is fixedly installed at the lower end of the middle position of the worktable. A base plate is fixedly connected to the first cylinder, and a fixing plate is fixedly connected to the upper end of the first cylinder. Fixing rods are fixedly connected to both the front and rear sides of the upper end of the base plate, and first connecting rods are sleeved on both the left and right ends of the fixing rods. A second connecting rod is connected to the middle position of the first connecting rod. During punching, a third cylinder drives the puncher downwards, while the second cylinder drives a robotic arm to apply axial tension to the steel pipe, balancing the punching force and preventing the thin-walled steel pipe from collapsing or the hole edge from deforming. The drawing action reduces material elastic rebound and burr generation, ensuring smooth hole walls and precise hole shapes.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe processing technology, specifically to an integrated punching and drawing device for steel pipes. Background Technology

[0002] With the rapid development of industries such as construction, automobiles, and energy, the volume of steel pipe processing has surged. Traditional processes cannot meet the demands of large-scale, fast-paced production. Guardrails, scaffolding, and other components require a large number of perforated steel pipes. Traditional processes are inefficient and have high labor costs. Components such as exhaust pipes and seat supports require high-precision through holes. Traditional sequential processing can easily lead to dimensional deviations. In the field of steel pipe processing, punching and drawing are usually carried out as two independent processes in traditional processes, resulting in low efficiency, high costs, and difficulty in guaranteeing processing quality.

[0003] However, traditional steel pipe processing requires punching with a punch press or hydraulic press first, followed by straightening the pipe deformation with a stretching machine or manually. This process is fragmented, time-consuming, and inefficient. Thin-walled steel pipes are prone to collapse, cracks, or burrs on the hole edge due to excessive local pressure during punching. High-strength steel, on the other hand, suffers from hole position displacement due to elastic rebound. During sequential processing, the cumulative error from multiple clamping and positioning makes it difficult to meet high standards for hole position accuracy (such as concentricity and perpendicularity) (e.g., automotive piping, precision instrument components). To address these issues, we propose an integrated punching and stretching device for steel pipes. Utility Model Content

[0004] The purpose of this invention is to provide an integrated punching and drawing device for steel pipes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A punching and drawing integrated device for steel pipes, comprising a workbench, a clamping assembly fixedly installed at the middle position of the workbench, the clamping assembly including a first cylinder, the first cylinder fixedly installed at the lower end of the middle position of the workbench, and a base plate fixedly connected to the first cylinder, a fixing plate fixedly connected to the upper end of the first cylinder, fixing rods fixedly connected to the front and rear sides of the upper end of the base plate, and first connecting rods sleeved at both ends of the fixing rods, a second connecting rod connected at the middle position of the first connecting rod, and a third connecting rod connected at the middle position of the second connecting rod, a clamping plate connected to the upper end of the third connecting rod, a second cylinder fixedly installed at both the left and right ends of the upper end of the workbench, and a robotic arm connected to the second cylinder, a connecting frame fixedly connected to the back side of the upper end of the workbench, and a third cylinder fixedly installed at the upper end of the connecting frame, and a punch fixedly installed at the lower end of the third cylinder.

[0006] Preferably, there are four sets of the first connecting rods, and all four sets of the first connecting rods are movably sleeved on the fixed rod.

[0007] Preferably, a second connecting rod is hinged to the middle position of the two sets of first connecting rods on their adjacent sides.

[0008] Preferably, both ends of the third connecting rod are hinged to the second connecting rod.

[0009] Preferably, there are four sets of clamping plates, and the four sets of clamping plates are distributed facing each other.

[0010] Preferably, the sides of the four sets of clamping plates that are close to each other are all provided with an arc-shaped structure, and the sides of the four sets of clamping plates that are close to each other are all fixedly connected with rubber anti-slip pads.

[0011] Preferably, the robotic arms are fixedly installed at the left and right ends of the clamping assembly, and the two sets of robotic arms are distributed facing each other.

[0012] This utility model provides an integrated punching and drawing device for steel pipes, which has the following advantages:

[0013] During punching, the puncher is driven downward by the third cylinder, while the second cylinder drives the robotic arm to apply axial tension to the steel pipe, balancing the punching force and preventing the thin-walled steel pipe from collapsing or the hole edge from deforming. The pulling action reduces the elastic rebound of the material and the generation of burrs, ensuring that the hole wall is smooth and the hole shape is accurate (such as no ellipticity error). The first cylinder drives the base plate and the fixing plate, and the clamping plate is opened and closed synchronously through multi-stage connecting rods (first, second and third connecting rods) to adapt to different pipe diameters.

[0014] The rigid structure of the fixed rod and connecting rod ensures clamping stability and prevents steel pipe deviation. The combination of the base plate and clamping plate can automatically correct the steel pipe axis, reduce manual adjustment time, and improve hole position accuracy. The robotic arm driven by the second cylinder can move laterally along the worktable, supporting continuous punching of multiple holes (such as straight holes, arc holes, or multi-station alternating processing). The punch can be replaced with different specifications of molds (such as round and oblong holes) to adapt to diverse processing needs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2This is an exploded structural diagram of the base and fixing plate of this utility model;

[0018] Figure 3 This is an exploded structural diagram of the clamping plate and the third connecting rod of this utility model;

[0019] Figure 4 This is an exploded view of the robotic arm and the second cylinder of this utility model.

[0020] In the diagram: 1. Workbench; 2. First cylinder; 3. Base plate; 4. Fixing plate; 5. Fixing rod; 6. First connecting rod; 7. Second connecting rod; 8. Third connecting rod; 9. Clamping plate; 10. Second cylinder; 11. Robotic arm; 12. Connecting frame; 13. Third cylinder; 14. Punching tool. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: an integrated punching and drawing device for steel pipes, including a workbench 1. A clamping assembly is fixedly installed in the middle of the workbench 1. The clamping assembly includes a first cylinder 2. The first cylinder 2 is fixedly installed at the lower end of the middle position of the workbench 1, and a base plate 3 is fixedly connected to the first cylinder 2. A fixing plate 4 is fixedly connected to the upper end of the first cylinder 2. Fixing rods 5 are fixedly connected to both the front and rear sides of the upper end of the base plate 3, and first connecting rods 5 are sleeved on both the left and right ends of the fixing rods 5. A first connecting rod 6 is connected to a second connecting rod 7 at its middle position, and a third connecting rod 8 is connected to the middle position of the second connecting rod 7. A clamping plate 9 is connected to the upper end of the third connecting rod 8. A second cylinder 10 is fixedly installed on both the left and right ends of the upper end of the worktable 1, and a robotic arm 11 is connected to the second cylinder 10. A connecting frame 12 is fixedly connected to the back side of the upper end of the worktable 1, and a third cylinder 13 is fixedly installed on the upper end of the connecting frame 12. A punch 14 is fixedly installed on the lower end of the third cylinder 13.

[0023] There are four sets of first connecting rods 6, all of which are movably sleeved on the fixed rod 5. A second connecting rod 7 is hinged to the middle of the side closest to each other of two sets of first connecting rods 6. The front and rear ends of the third connecting rod 8 are hinged to the second connecting rod 7. There are four sets of clamping plates 9, arranged opposite each other. The side of each set of clamping plates 9 that is close to each other has an arc-shaped structure, and a rubber anti-slip pad is fixedly connected to the side of each set of clamping plates that is close to each other. The four sets of first connecting rods 6 movably sleeved on the fixed rod 5 form a symmetrical structure, ensuring that the steel pipe is subjected to uniform force during clamping and avoiding excessive pressure on one side that could lead to deformation or displacement. The triangular hinged design of the multiple sets of connecting rods forms a stable spatial truss structure, resisting the rotation of the steel pipe. The second connecting rod 7 and the third connecting rod 8 are hinged to improve clamping stability. Through the relative movement of the hinge point, the connecting rods can adapt to steel pipes of different diameters (such as DN15~DN300), eliminating the need for frequent clamp changes. When the first cylinder 2 drives the base plate 3, the four sets of clamping plates 9 open and close synchronously through the connecting rods, achieving rapid clamping and reducing manual adjustment time. The inner side of the clamping plate 9 has an arc-shaped structure that fits against the outer wall of the steel pipe, avoiding material damage caused by excessive local pressure (such as collapse of thin-walled pipes). The rubber anti-slip pad increases friction and prevents the steel pipe from sliding during punching or pulling; it also acts as a buffer, reducing the impact of clamping stress on the pipe. The rubber pad can be replaced periodically to avoid wear caused by direct metal-to-metal contact, reducing maintenance costs.

[0024] The robotic arms 11 are fixedly installed at the left and right ends of the clamping assembly. The two sets of robotic arms 11 are distributed in opposite directions. The two sets of robotic arms 11 provide symmetrical driving force during punching or pulling, preventing the steel pipe from tilting or rotating due to unilateral force, ensuring processing stability. The symmetrical structure forms a torque balance, resisting the torsional deformation of the steel pipe during punching. It is especially suitable for thin-walled pipes or high-toughness materials (such as aluminum alloys and stainless steel).

[0025] Working principle: The first cylinder 2 drives the base plate 3 to rise, and the four sets of clamping plates 9 open outward through the connecting rod mechanism, placing the steel pipe horizontally in the arc-shaped groove of the clamping plate 9. The first cylinder 2 descends, and the clamping plate 9 closes inward, securing the steel pipe with rubber anti-slip pads. The symmetry of the clamping components and the hinge design of the connecting rod ensure that the axis of the steel pipe is aligned with the punch 14. The third cylinder 13 drives the punch 14 to press down vertically, contacting the surface of the steel pipe. The second cylinder 10 drives two sets of robotic arms 11 to apply axial tension (to the left / right) to the steel pipe, balancing the downward pressure of the punch 14. During punching, the tension of the robotic arms 11 counteracts local high pressure, preventing the thin-walled pipe from collapsing or the hole edge from deforming. The pulling action reduces the elastic rebound of the material, ensuring the accuracy of the hole dimensions.

[0026] After punching is completed, the third cylinder 13 lifts the puncher 14, the second cylinder 10 retracts the robotic arm 11 to release the axial tension, the first cylinder 2 drives the base plate 3 to descend, the clamping plate 9 is released, and the processed steel pipe is taken out.

[0027] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0028] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0029] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A punching and drawing integrated device for steel pipes, comprising a workbench (1), characterized in that: A clamping assembly is fixedly installed at the middle position of the workbench (1). The clamping assembly includes a first cylinder (2). The first cylinder (2) is fixedly installed at the lower end of the middle position of the workbench (1), and a base plate (3) is fixedly connected to the first cylinder (2). A fixing plate (4) is fixedly connected to the upper end of the first cylinder (2). Fixing rods (5) are fixedly connected to the front and rear sides of the upper end of the base plate (3), and first connecting rods (6) are sleeved on both the left and right ends of the fixing rods (5). A second connecting rod (6) is connected to the middle position of the first connecting rod (6). A connecting rod (7) is connected to a third connecting rod (8) at the middle position of the second connecting rod (7). A clamping plate (9) is connected to the upper end of the third connecting rod (8). A second cylinder (10) is fixedly installed on both the left and right ends of the upper end of the workbench (1). A mechanical arm (11) is connected to the second cylinder (10). A connecting frame (12) is fixedly connected to the back side of the upper end of the workbench (1). A third cylinder (13) is fixedly installed on the upper end of the connecting frame (12). A punch (14) is fixedly installed on the lower end of the third cylinder (13).

2. The punching and drawing integrated equipment for steel pipes according to claim 1, characterized in that: The first connecting rod (6) is provided in four sets, and all four sets of the first connecting rod (6) are movably sleeved on the fixed rod (5).

3. The punching and drawing integrated equipment for steel pipes according to claim 1, characterized in that: A second connecting rod (7) is hinged to the middle position of the two sets of first connecting rods (6) on their adjacent sides.

4. The punching and drawing integrated equipment for steel pipes according to claim 1, characterized in that: The front and rear ends of the third connecting rod (8) are both hinged to the second connecting rod (7).

5. The punching and drawing integrated equipment for steel pipes according to claim 1, characterized in that: The clamping plates (9) are provided in four sets, and the four sets of clamping plates (9) are distributed in opposite directions.

6. The punching and drawing integrated equipment for steel pipes according to claim 1, characterized in that: The four sets of clamping plates (9) are all provided with an arc-shaped structure on the side that is close to each other, and the four sets of clamping plates (9) are all fixedly connected with rubber anti-slip pads on the side that is close to each other.

7. The punching and drawing integrated equipment for steel pipes according to claim 1, characterized in that: The robotic arms (11) are fixedly installed at the left and right ends of the clamping assembly, and the two sets of robotic arms (11) are distributed facing each other.

Images