Pipe straightening machine and its pressure roller mechanism

Abstract

The utility model belongs to pipe drawing equipment technical field, concretely relates to pipe straight -draw machine and its compression roller mechanism. Pipe straight -draw machine is used compression roller mechanism for setting above the conveying mechanism of conveying pipe, including frame, linear drive part and compression roller, linear drive part is fixed on the frame, and the drive end of linear drive part is connected with mounting bracket to drive mounting bracket to lift relative to the frame, compression roller rotates assembly is in mounting bracket with, and the upper and lower correspondence of the conveying roller of setting position in conveying mechanism, is equipped with the arc compression groove of matching with the outer surface of pipe on compression roller, and is contacted with pipe pressure downward through arc compression groove. Pipe straight -draw machine includes the conveying mechanism for conveying pipe, and the above compression roller mechanism is arranged on the top of conveying mechanism. The utility model can realize the stable conveying of pipe, reduce the probability of skidding, guarantee the quality of pipe drawing.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipe drawing equipment, specifically relating to a pipe straight drawing machine and its pressure roller mechanism. Background Technology

[0002] Copper tubes, as important industrial tubing, are widely used in refrigeration, construction, and machinery industries. In their forming process, the straight drawing machine / drawing machine is the core equipment for achieving continuous stretching and precise dimensional control of the tube. The working principle of a traditional copper tube straight drawing machine is that the friction of the conveying rollers drives the copper tube forward, while a mandrel is inserted from inside the tube to form a specific diameter and wall thickness. This process requires the copper tube to maintain stable linear motion during conveying and precise alignment with the mandrel to ensure the quality of the finished product.

[0003] Whether using copper or other materials, traditional equipment primarily relies on the friction between the conveyor rollers and the surface of the copper tube for propulsion during operation. However, due to the smooth surface of the copper tube, the presence of lubricating media during the drawing process, and the wear and tear on the conveyor rollers after long-term use, insufficient friction occurs. When relative sliding occurs between the conveyor rollers and the copper tube, slippage occurs, which directly affects the stability of the drawing process. Utility Model Content

[0004] The purpose of this utility model is to provide a pressure roller mechanism for a tube straight drawing machine to solve the technical problem that copper tubes are prone to slippage during transportation, thus affecting the drawing stability. The purpose of this utility model is also to provide a tube straight drawing machine to ensure the drawing quality of copper tubes.

[0005] To solve the above problems, the pressure roller mechanism for the pipe straight drawing machine provided by this utility model adopts the following technical solution: A pressure roller mechanism for a pipe straight drawing machine is used to be installed above the conveying mechanism for conveying pipes. It includes a frame, a linear drive, and a pressure roller. The linear drive is fixed on the frame, and the drive end of the linear drive is connected to a mounting frame to drive the mounting frame to rise and fall relative to the frame. The pressure roller is rotatably mounted on the mounting frame and corresponds vertically to the conveying roller at a set position in the conveying mechanism. The pressure roller is provided with an arc-shaped pressure groove that matches the outer surface of the pipe and presses downwards into contact with the pipe through the arc-shaped pressure groove. The beneficial effects are: while the conveying roller is conveying the pipe, the pressure roller is driven to fall by the linear drive component, so that the pressure roller presses against the pipe through the arc-shaped pressure groove on it, which increases the friction between the conveying roller and the pipe, making the pipe less likely to slip during the conveying process, thereby improving the drawing stability and ensuring the drawing quality of the pipe.

[0006] Furthermore, the mounting frame includes a top plate and side plates connected to both sides of the top plate. The pressure roller is disposed between the two side plates, and a first bearing is disposed between each side plate. The inner rings of the two first bearings are connected to the roller shaft of the pressure roller. A first protective cover is provided on the outer side of each side plate located on the first bearing.

[0007] Furthermore, a centering adjustment roller is mounted on the frame in an adjustable position along the vertical direction. The axis of the centering adjustment roller is parallel to the axis of the pressure roller. The centering adjustment roller and the pressure roller are staggered in the conveying direction of the pipe, and the centering adjustment roller is always located below the pressure roller. The centering adjustment roller is provided with a support ring groove for supporting the pipe. The centering adjustment roller is used to adjust the vertical position of the pipe so that the pipe is aligned with the mandrel.

[0008] Beneficial effects: The centering adjustment roller can support the tube. When the centering adjustment roller is adjusted up and down, it drives the tube to be adjusted together in the up and down direction, which facilitates the centering of the tube and the mandrel.

[0009] Furthermore, a connecting frame is fixed to the bottom of the mounting frame, and the centering adjustment roller is rotatably mounted on the connecting frame.

[0010] Beneficial effects: The lifting and lowering of the pressure roller and the centering adjustment roller can be achieved simultaneously through a single linear drive, saving costs.

[0011] Furthermore, the cross-section of the support ring groove is V-shaped.

[0012] Beneficial effects: The two inclined surfaces of the V-groove are symmetrical and form an angle. When supporting cylindrical parts such as tubes, the tubes will naturally fit the two inclined surfaces, and the symmetry of the V-shape will be used to achieve automatic radial centering.

[0013] Furthermore, a second bearing is provided on each of the two axial sides inside the centering adjusting roller, and the inner rings of the two second bearings are connected to the centering roller shaft. A second protective cover is provided at each of the two axial ends of the centering adjusting roller, covering the second bearings. The connecting frame includes two parallel and spaced connecting plates located on the two axial sides of the centering adjusting roller. A positioning plate is fixed on the side of each connecting plate facing away from the centering adjusting roller. The two ends of the centering roller shaft pass through the corresponding positioning plates and are connected to round nuts that stop and cooperate with the positioning plates on the side of the positioning plates facing away from the connecting plates. A bushing is sleeved on the part of the centering roller shaft located between the connecting plate and the second protective cover.

[0014] Furthermore, the linear drive component is a cylinder.

[0015] Beneficial effects: The cylinder has a fast response time, making it suitable for automated production lines that require quick start and stop.

[0016] Furthermore, the frame includes four rectangularly distributed columns and four rectangularly distributed crossbeams. Both ends of any crossbeam are vertically connected to the tops of the two adjacent columns. Cylinder mounting seats are fixed on the two oppositely arranged crossbeams. The linear drive component is fixed on the cylinder mounting seats. Both the columns and crossbeams are made of channel steel.

[0017] Beneficial effects: Simple structure, readily available materials, and low production cost.

[0018] The technical solution for the pipe straight drawing machine provided by this utility model is: The pipe straight drawing machine includes a conveying mechanism for conveying pipes, and a pressure roller mechanism is provided above the conveying mechanism. The pressure roller mechanism includes a frame, a linear drive component, and a pressure roller. The linear drive component is fixed on the frame, and the drive end of the linear drive component is connected to a mounting frame to drive the mounting frame to rise and fall relative to the frame. The pressure roller is rotatably mounted on the mounting frame and corresponds vertically to the conveying roller at a set position in the conveying mechanism. The pressure roller is provided with an arc-shaped pressure groove that matches the outer surface of the pipe, and presses downwards into contact with the pipe through the arc-shaped pressure groove. The beneficial effects are: the pressure roller mechanism set on the pipeline straight drawing machine works in conjunction with the conveying mechanism to increase the friction between the conveying roller and the pipe, thereby stabilizing the conveying of the pipe, reducing the probability of pipe slippage, improving drawing stability, and ensuring the drawing quality of the pipe.

[0019] Furthermore, the mounting frame includes a top plate and side plates connected to both sides of the top plate. The pressure roller is disposed between the two side plates, and a first bearing is disposed between each side plate. The inner rings of the two first bearings are connected to the roller shaft of the pressure roller. A first protective cover is provided on the outer side of each side plate located on the first bearing.

[0020] Furthermore, a centering adjustment roller is mounted on the frame in an adjustable position along the vertical direction. The axis of the centering adjustment roller is parallel to the axis of the pressure roller. The centering adjustment roller and the pressure roller are staggered in the conveying direction of the pipe, and the centering adjustment roller is always located below the pressure roller. The centering adjustment roller is provided with a support ring groove for supporting the pipe. The centering adjustment roller is used to adjust the vertical position of the pipe so that the pipe is aligned with the mandrel.

[0021] Beneficial effects: The centering adjustment roller can support the tube. When the centering adjustment roller is adjusted up and down, it drives the tube to be adjusted together in the up and down direction, which facilitates the centering of the tube and the mandrel.

[0022] Furthermore, a connecting frame is fixed to the bottom of the mounting frame, and the centering adjustment roller is rotatably mounted on the connecting frame.

[0023] Beneficial effects: The lifting and lowering of the pressure roller and the centering adjustment roller can be achieved simultaneously through a single linear drive, saving costs.

[0024] Furthermore, the cross-section of the support ring groove is V-shaped.

[0025] Beneficial effects: The two inclined surfaces of the V-groove are symmetrical and form an angle. When supporting cylindrical parts such as tubes, the tubes will naturally fit the two inclined surfaces, and the symmetry of the V-shape will be used to achieve automatic radial centering.

[0026] Furthermore, a second bearing is provided on each of the two axial sides inside the centering adjusting roller, and the inner rings of the two second bearings are connected to the centering roller shaft. A second protective cover is provided at each of the two axial ends of the centering adjusting roller, covering the second bearings. The connecting frame includes two parallel and spaced connecting plates located on the two axial sides of the centering adjusting roller. A positioning plate is fixed on the side of each connecting plate facing away from the centering adjusting roller. The two ends of the centering roller shaft pass through the corresponding positioning plates and are connected to round nuts that stop and cooperate with the positioning plates on the side of the positioning plates facing away from the connecting plates. A bushing is sleeved on the part of the centering roller shaft located between the connecting plate and the second protective cover.

[0027] Furthermore, the linear drive component is a cylinder.

[0028] Beneficial effects: The cylinder has a fast response time, making it suitable for automated production lines that require quick start and stop.

[0029] Furthermore, the frame includes four rectangularly distributed columns and four rectangularly distributed crossbeams. Both ends of any crossbeam are vertically connected to the tops of the two adjacent columns. Cylinder mounting seats are fixed on the two oppositely arranged crossbeams. The linear drive component is fixed on the cylinder mounting seats. Both the columns and crossbeams are made of channel steel.

[0030] Beneficial effects: Simple structure, readily available materials, and low production cost. Attached Figure Description

[0031] Figure 1 This is a front view of the pressure roller mechanism for the pipe straight drawing machine of this utility model; Figure 2 for Figure 1 AA section view; Figure 3 This is a top view of the pressure roller mechanism for the pipe straight drawing machine of this utility model.

[0032] Explanation of reference numerals in the attached figures: 1. Frame; 2. Linear drive component; 3. Pressure roller; 4. Mounting frame; 5. Top plate; 6. Side plate; 7. First bearing; 8. First protective cover; 9. Centering adjustment roller; 10. Connecting plate; 11. Positioning plate; 12. Bushing; 13. Centering roller shaft; 14. Round nut; 15. Second bearing; 16. Second protective cover; 17. Conveyor roller; 18. Column; 19. Crossbeam; 20. Cylinder mounting seat; 21. Arc-shaped pressure groove; 22. Support ring groove. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] An embodiment of the pressure roller mechanism for a tube straight drawing machine provided by this utility model: like Figure 1 , Figure 2 and Figure 3 As shown, the pressure roller 3 mechanism of the pipe drawing machine is installed above the pipe conveying mechanism and includes a frame 1, a linear drive 2, and a pressure roller 3. In practical use, it is used in the drawing operation of copper pipes. Of course, it can also be used in other situations where other pipes need to be drawn.

[0035] Among them, such as Figure 3 As shown, the frame 1 comprises four rectangularly arranged uprights 18 and four rectangularly arranged crossbeams 19. Both the uprights 18 and crossbeams 19 are made of common channel steel. Both ends of any crossbeam 19 are vertically welded to the tops of the corresponding two adjacent uprights 18. In this embodiment, the linear drive component 2 is a cylinder. A cylinder mounting base 20 is fixed to one of the crossbeams 19, and the cylinder is fixed to the cylinder mounting base 20 with its drive end facing downwards. Of course, the uprights 18 and crossbeams 19 are not limited to channel steel; rectangular tubes can also be used in actual use.

[0036] The cylinder's drive end is connected to a mounting bracket 4 via a flange to drive the mounting bracket 4 to rise and fall relative to the frame 1. The mounting bracket 4 includes a top plate 5 and side plates 6 connected to both sides of the top plate 5. The pressure roller 3 is positioned between the two side plates 6, and a first bearing 7 is provided between each side plate 6. The inner rings of the two first bearings 7 are connected to the roller shaft of the pressure roller 3. A first protective cover 8 is provided on the outer side of each side plate 6, thereby enabling the rotational assembly of the pressure roller 3 and the mounting bracket 4. The installation position of the pressure roller 3 corresponds vertically to the conveying roller 17 at a set position in the conveying mechanism, and the shape and size of the pressure roller 3 are also the same as those of the conveying roller 17 in the conveying mechanism. Both are provided with arc-shaped pressure grooves 21 that match the outer surface of the pipe, and the pressure roller 3 presses downward against the pipe through the arc-shaped pressure grooves 21.

[0037] A connecting frame is fixed to the top plate 5 of the mounting frame 4 next to the pressure roller 3. The connecting frame includes two parallel and spaced connecting plates 10, and a centering adjusting roller 9 is assembled between the two connecting plates 10. The axis of the centering adjusting roller 9 is parallel to the axis of the pressure roller 3, such as... Figure 1As shown, the centering adjusting roller 9 and the pressure roller 3 are staggered in the conveying direction of the pipe, and the centering adjusting roller 9 is always located below the pressure roller 3. When the cylinder extends or retracts, the centering adjusting roller 9 can rise and fall synchronously with the pressure roller 3 to achieve position adjustment relative to the frame 1 in the vertical direction. Second bearings 15 are fixed to both axial sides inside the centering adjusting roller 9, and the inner rings of the two second bearings 15 are connected to the centering roller shaft 13. Second protective covers 16 covering the second bearings 15 are provided at both axial ends of the centering adjusting roller 9. A positioning plate 11 is fixed to the side of each connecting plate 10 facing away from the centering adjusting roller 9. Both ends of the centering roller shaft 13 pass through the corresponding positioning plates 11, and round nuts 14 that stop and cooperate with the positioning plates 11 are connected to the portion of the positioning plates 11 facing away from the connecting plates 10. A bushing 12 is fitted onto the portion of the centering roller shaft 13 located between the connecting plate 10 and the second protective cover 16 to fix the centering roller shaft 13. The centering adjustment roller 9 can rotate relative to the centering roller shaft 13 via the second bearing 15.

[0038] like Figure 2 As shown, the centering adjustment roller 9 is provided with a support ring groove 22 for supporting the tube. The cross-section of the support ring groove 22 is V-shaped. When the copper tube is placed in the support ring groove 22, it can be kept in the center. The centering adjustment roller 9 can adjust the vertical position of the copper tube under the drive of the cylinder so that the copper tube is aligned with the mandrel.

[0039] The specific working process of the pressure roller 3 mechanism for the pipe straight drawing machine of this utility model is as follows: Before threading the copper tube, the cylinder extends downwards, lowering the centering roller 9 to a position slightly below the conveyor roller 17. The copper tube to be drawn is then inserted between the pressure roller 3 and the conveyor roller 17, at which point the pressure roller 3 is not in contact with the copper tube. Next, the cylinder extends upwards, allowing the centering roller 9 to support the copper tube. The position of the copper tube is finely adjusted up and down by extending and retracting the cylinder until it is aligned with the mandrel. Finally, the cylinder extends downwards, bringing both the pressure roller 3 and the conveyor roller 17 into contact with the copper tube. Since the centering roller 9 is located below the pressure roller 3, it is now also below the conveyor roller 17 and separated from the copper tube. The pressure roller 3, being a passive roller, contacts the copper tube to increase the friction between the conveyor roller 17 and the copper tube, reducing the chance of slippage and ensuring a smoother drawing process.

[0040] In other embodiments, the linear drive may also include components such as hydraulic cylinders, linear modules, and electric actuators.

[0041] In other embodiments, the centering adjustment roller and the pressure roller can also be raised and lowered by separate linear drive components. For example, the pressure roller can be raised and lowered by a cylinder at the top of the frame. A cylinder is also fixed inside the frame, and the output end of the cylinder is fixed to a connecting frame to realize the raising and lowering of the centering adjustment roller.

[0042] An embodiment of the pipe straight drawing machine provided by this utility model: The pipe drawing machine includes a conveying mechanism for conveying pipes, and a pressure roller mechanism is provided above the conveying mechanism. The structure of the pressure roller mechanism is the same as that of the pressure roller mechanism for the pipe drawing machine in the above embodiments, and will not be described in detail here.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pressure roller mechanism for a pipe straight drawing machine, characterized in that, It is used to be installed above the conveying mechanism for conveying pipes, and includes a frame, a linear drive and a pressure roller; The linear drive is fixed on the frame, and the drive end of the linear drive is connected to the mounting frame to drive the mounting frame to rise and fall relative to the frame. The pressure roller is rotated and assembled on the mounting frame and corresponds vertically to the conveying roller at a set position in the conveying mechanism. The pressure roller is provided with an arc-shaped pressure groove that matches the outer surface of the pipe and presses downward against the pipe through the arc-shaped pressure groove. The linear drive component is a cylinder. A centering adjustment roller is adjustablely mounted on the frame along the vertical direction. The axis of the centering adjustment roller is parallel to the axis of the pressure roller. The centering adjustment roller and the pressure roller are staggered in the conveying direction of the pipe, and the centering adjustment roller is always located below the pressure roller. The centering adjustment roller is provided with a support ring groove for supporting the pipe. The centering adjustment roller is used to adjust the vertical position of the pipe so that the pipe is aligned with the mandrel. A connecting frame is fixed at the bottom of the mounting frame, and the centering adjustment roller is rotatably mounted on the connecting frame. Before inserting the copper tube, the cylinder extends downwards, lowering the centering roller to a position below the conveying roller. Then, the copper tube to be drawn is inserted between the pressure roller and the conveying roller, with the pressure roller not in contact with the copper tube. Next, the cylinder extends upwards, allowing the centering roller to support the copper tube. The position of the copper tube is adjusted up and down by extending and retracting the cylinder until the copper tube is aligned with the mandrel. Finally, the cylinder extends downwards, bringing both the pressure roller and the conveying roller into contact with the copper tube, and the centering roller separates from the copper tube.

2. The pressure roller mechanism for a pipe straight drawing machine according to claim 1, characterized in that, The mounting frame includes a top plate and side plates connected to both sides of the top plate. The pressure roller is disposed between the two side plates. A first bearing is disposed between each side plate. The inner rings of the two first bearings are connected to the roller shaft of the pressure roller. A first protective cover is provided on the outer side of each side plate located on the first bearing.

3. The pressure roller mechanism for a pipe straight drawing machine according to claim 1, characterized in that, The cross-section of the support ring groove is V-shaped.

4. The pressure roller mechanism for a pipe straight drawing machine according to claim 1, characterized in that, The centering adjusting roller has two second bearings installed on its axial sides. The inner rings of the two second bearings are connected to the centering roller shaft. The two ends of the centering adjusting roller are provided with second protective covers covering the second bearings. The connecting frame includes two parallel and spaced connecting plates located on the two axial sides of the centering adjusting roller. A positioning plate is fixed on the side of each connecting plate facing away from the centering adjusting roller. The two ends of the centering roller shaft pass through the corresponding positioning plates and are connected to the portion of the positioning plates facing away from the connecting plates with round nuts that stop with the positioning plates. The portion of the centering roller shaft located between the connecting plates and the second protective covers is fitted with a bushing.

5. The pressure roller mechanism for a pipe straight drawing machine according to any one of claims 1-4, characterized in that, The frame includes four rectangular columns and four rectangular beams. Both ends of any beam are vertically connected to the tops of the two adjacent columns. Cylinder mounting seats are fixed on the two opposing beams. The linear drive component is fixed on the cylinder mounting seats. Both the columns and beams are made of channel steel.

6. A pipe straight drawing machine, comprising a conveying mechanism for conveying pipes, characterized in that, A pressure roller mechanism is provided above the conveying mechanism, and the pressure roller mechanism is the pressure roller mechanism for the pipe straight drawing machine as described in any one of claims 1-5.

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