A steel pipe grooving machine and method integrating flat end function

Abstract

The application relates to a steel pipe grooving machine integrated with a flat-end function and a method, which comprises a shell, a power system arranged in the shell, a lower pressing wheel connected with the power system through a lower pressing wheel main shaft, an upper pressing wheel arranged above the lower pressing wheel and connected with a lifting hydraulic cylinder fixed to the shell, a ring-shaped positioning disc coaxially arranged on one side of the lower pressing wheel and sleeved with the outer periphery of the lower pressing wheel main shaft, a plurality of cutting tools arranged on the disc surface of the ring-shaped positioning disc close to the lower pressing wheel to cut the pipe end of the steel pipe, and a telescopic driving element connected with the ring-shaped positioning disc to realize movement along the axis direction of the lower pressing wheel. The grooving machine adopts the application, and the secondary flat-end or secondary grinding process is omitted, so that the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of steel pipe processing equipment technology, specifically to a steel pipe grooving machine and method with integrated flat end function. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Currently, steel pipe grooving machines lack end-smoothing devices. During grooving, the pipe ends become thinner and longer due to the pressure from the upper and lower rollers, with inconsistent elongation. This elongation often causes wear on the grooving machine's sizing plate, resulting in inconsistent sealing surfaces on the grooved steel pipes. Furthermore, the thinning and elongation of the pipe ends can damage the bolts securing the sizing plate, causing it to loosen. This leads to increased slope at the pipe ends, resulting in protrusions and steps that affect the grooving quality. Patent CN218253069U discloses an online end-smoothing device for steel pipe grooving machines, which includes an additional end-smoothing machine for secondary end-smoothing or secondary grinding of the grooved pipe ends. However, this method requires end-smoothing after grooving, increasing production steps and impacting efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a steel pipe grooving machine and method that integrates end-smoothing functions, performing end-smoothing simultaneously with grooving, eliminating the need for secondary end-smoothing or secondary grinding, thereby improving the production efficiency of steel pipe grooving.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] In a first aspect, embodiments of the present invention provide a steel pipe grooving machine with integrated flat-end function, including a housing, a power system inside the housing, the power system being connected to the lower pressure roller via a lower pressure roller main shaft, an upper pressure roller being provided above the lower pressure roller, the upper pressure roller being connected to a lifting hydraulic cylinder fixed to the housing, an annular positioning disc being coaxially provided on one side of the lower pressure roller and sleeved on the outer circumference of the lower pressure roller main shaft, a plurality of cutting tools being provided on the disc surface near the lower pressure roller to cut the end of the steel pipe, and the annular positioning disc being connected to a telescopic drive component to realize movement along the axis of the lower pressure roller.

[0007] Optionally, it also includes an image acquisition element, which is set on one side of the lower pressure roller and is used to acquire images of the pipe end between the upper and lower pressure rollers. The image acquisition element is connected to the data processing terminal and can transmit the acquired image information to the data processing terminal.

[0008] Optionally, the image acquisition element is an infrared camera, which is connected to a data processing terminal.

[0009] Optionally, the telescopic drive is equipped with a displacement detection element to detect the displacement of its moving part.

[0010] Optionally, the displacement detection element is a grating ruler, the reading head of the grating ruler is fixed to the fixed part of the telescopic drive component, and the main body of the grating ruler is mounted on the moving part of the telescopic drive component.

[0011] Optionally, the annular positioning disc uses a hollow hydraulic cylinder, with the main shaft of the lower pressure wheel passing through the internal cavity of the hollow hydraulic cylinder, and the piston rod of the hollow hydraulic cylinder connected to the annular positioning disc.

[0012] Optionally, the lifting hydraulic cylinder and the hollow hydraulic cylinder are connected to a servo hydraulic station via oil circuits, and their operation is controlled by the servo hydraulic station.

[0013] Optionally, the piston rod of the lifting hydraulic cylinder is connected to the wheel frame, and the wheel frame is rotatably connected to the upper pressure wheel. The wheel surface of the upper pressure wheel is provided with annular protrusions to form an annular groove at the end of the steel pipe. Correspondingly, the wheel surface of the lower pressure wheel is provided with annular grooves that match the annular protrusions.

[0014] Optionally, the cutting tool is made of high-speed steel or cemented carbide.

[0015] Secondly, embodiments of the present invention provide a method for a steel pipe grooving machine with integrated flat-end function:

[0016] Driven by the power system, the lower pressure roller rotates, which in turn drives the steel pipe surrounding it to rotate. The upper pressure roller, driven by the lifting hydraulic cylinder, applies downward pressure to the steel pipe. While rotating with the steel pipe, it grooves the end of the steel pipe. The telescopic drive unit drives the cutting tool of the annular positioning disc to always be in contact with the end face of the steel pipe. During the grooving process, the end face of the steel pipe is cut, so that the distance between the grooved position and the end face of the steel pipe is kept within a set range.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The grooving machine of the present invention integrates a flat-end function. A cutting tool is provided on the disc surface of the annular positioning disc near the lower pressure roller, and the annular positioning disc is connected to a telescopic drive component. When the upper and lower pressure rollers groove the steel pipe, the telescopic drive component can drive the annular positioning disc to move. The cutting tool is used to cut the end of the steel pipe to achieve the flat-end function, so that the distance between the groove position of the steel pipe and the end of the steel pipe is kept within a set range. The flat-end function is performed at the same time as the grooving, eliminating the need for secondary flat-end or secondary grinding of the end of the steel pipe, saving the secondary flat-end or secondary grinding process, and improving the production efficiency of steel pipe grooving.

[0019] 2. The grooving machine with integrated flat end function of the present invention is equipped with an image acquisition element, which can acquire images of the steel pipe end in real time, thereby using the image to obtain the distance between the grooving position and the pipe end in real time. The telescopic drive component is equipped with a displacement detection element, which can detect the movement distance of its moving part, thereby realizing the movement of the telescopic drive component controlled by the image, improving the automation level of the whole process and saving manpower. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0022] The components include: 1. outer shell, 2. lower pressure roller spindle, 3. lower pressure roller, 4. steel pipe, 5. upper pressure roller, 6. lifting hydraulic cylinder, 7. wheel frame, 8. servo hydraulic station, 9. control terminal, 10. annular positioning disc, 11. hollow hydraulic cylinder, 12. data processing terminal, and 13. infrared camera. Detailed Implementation

[0023] For ease of description, the words "upper" and "lower" appearing in this invention only indicate that they are consistent with the upper and lower directions of the accompanying drawings and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Example 1

[0025] This embodiment provides a steel pipe grooving machine with integrated flat end function, including a housing 1. A power system is installed inside the housing 1. The power system is connected to the lower pressure roller main shaft 2 and can drive the lower pressure roller main shaft 2 to rotate around its own axis. The other end of the lower pressure roller main shaft 2 extends out of the housing and is connected to the lower pressure roller 3, which can drive the lower pressure roller 3 to rotate. When the steel pipe 4 is grooved, the end of the steel pipe 4 is sleeved on the outer circumference of the lower pressure roller 3. The rotation of the lower pressure roller 3 can drive the steel pipe 4 to rotate around its own axis.

[0026] An upper pressure roller 5 is provided directly above the lower pressure roller 3. The upper pressure roller 5 is connected to the piston rod of the lifting hydraulic cylinder 6. The axis of the lifting hydraulic cylinder 6 is vertically arranged so as to drive the upper pressure roller 5 to perform lifting and lowering movements. The cylinder body of the lifting hydraulic cylinder 6 is fixedly connected to the outer shell 1.

[0027] The upper pressure roller 5 has an annular protrusion on its surface, which matches the pressure groove at the end of the steel pipe 4. Correspondingly, the lower pressure roller 3 has an annular groove on its surface that matches the annular protrusion.

[0028] In this embodiment, the piston rod end of the lifting hydraulic cylinder 6 is connected to a wheel frame 7, and the upper pressure wheel 5 is rotatably connected to the wheel frame 7.

[0029] During the pressing process, the rotating steel pipe 4 can drive the upper pressure roller 5 to rotate passively.

[0030] The lifting hydraulic cylinder 6 is connected to the servo hydraulic station 8 via an oil pipe. The servo hydraulic station 8 can control the operation of the lifting hydraulic cylinder 6. The servo hydraulic station 8 can be an existing device, driven by a servo motor. The servo hydraulic station 8 is connected to the control terminal 9 of the control system, and its operation is controlled by the control terminal 9.

[0031] The above structure can be achieved using the existing steel pipe grooving machine structure, and its specific details will not be described in detail here.

[0032] An annular positioning disc 10 is provided on one side of the pressure roller 3. The annular positioning disc 10 is located outside the outer shell 1. The annular positioning disc 10 can contact the end of the steel pipe 4. The annular positioning disc 10 is coaxially arranged with the pressure roller 3 and is sleeved on the outer circumference of the pressure roller main shaft 2.

[0033] The annular positioning disk 10 is equipped with multiple cutting tools on its disk surface near the lower pressure roller 3. The positions of the cutting tools correspond to the positions of the ends of the steel pipe 4, enabling the cutting of the ends of the steel pipe 4.

[0034] Preferably, the cutting tool is made of high-speed steel or cemented carbide material, and those skilled in the art can configure it according to actual needs.

[0035] The annular positioning disk 10 is connected to a telescopic drive component located inside the housing. The telescopic drive component can drive the annular positioning disk 10 to move along the axial direction of the pressure roller 3 and the pressure roller main shaft 2.

[0036] In this embodiment, the telescopic drive component adopts an existing hollow hydraulic cylinder 11. The hollow hydraulic cylinder 11 is coaxially sleeved on the outer periphery of the lower pressure wheel main shaft 2. The hollow hydraulic cylinder 11 is fixed inside the outer shell 1 by a hydraulic cylinder seat. The piston rod of the hollow hydraulic cylinder 11 extends to the outside of the outer shell 1 and is connected to the annular positioning disk 10. The piston rod is slidably connected to the outer shell 1. The outer shell 1 can guide the movement of the piston rod. The telescopic movement of the piston rod of the hollow hydraulic cylinder 11 can drive the annular positioning disk 10 to move along the axial direction of the lower pressure wheel 3 and the lower pressure wheel main shaft 2.

[0037] The hollow hydraulic cylinder 11 is connected to the servo hydraulic station 8 via an oil pipe, and its operation is controlled by the servo hydraulic station 8.

[0038] This embodiment also includes an image acquisition element, which is located on one side of the lower pressure roller. The image acquisition element can acquire images of the end of the steel pipe in real time. The image acquisition element is connected to the data processing terminal 12 of the control system and can transmit the acquired images to the data processing terminal 12. The data processing terminal 12 can obtain the distance between the pressure groove position of the steel pipe 4 and the end face of the steel pipe 4 based on the acquired images. The distance between the pressure groove position and the end face of the steel pipe 4 can be obtained by existing image analysis methods, which will not be described in detail here.

[0039] Preferably, the image acquisition element is an infrared camera 13.

[0040] The hollow hydraulic cylinder 11 is also equipped with a displacement detection element, which is used to detect the extension distance of the piston rod.

[0041] Preferably, the displacement detection element is a grating ruler, the reading head of the grating ruler is fixed to the cylinder body of the hollow hydraulic cylinder 11, and its main scale is connected to the piston rod of the hollow hydraulic cylinder.

[0042] The grating ruler is connected to the data processing terminal 12 of the control system, and can transmit the collected displacement information to the data processing terminal 12. At the same time, the control terminal 9 of the control system is connected to the servo hydraulic station 8, and the control terminal 9 can control the operation of the servo hydraulic station 8.

[0043] Example 2

[0044] This embodiment provides a method for a steel pipe grooving machine with integrated flat-end function as described in Embodiment 1:

[0045] The end of the steel pipe 4 to be grooved is fitted onto the outer circumference of the lower pressure roller 3. The power system drives the lower pressure roller 3 to rotate through the main shaft 2 of the lower pressure roller. The lower pressure roller 3 drives the steel pipe 4 to rotate. The lifting hydraulic cylinder 6 drives the upper pressure roller 5 to descend. The upper pressure roller 5 applies downward pressure to the steel pipe 4 through the annular protrusion. The annular protrusion is used to groove the end of the steel pipe 4. At the same time as grooving, the upper pressure roller 5 performs driven movement under the drive of the steel pipe 4.

[0046] While the steel pipe 4 is being grooved at its end, the infrared camera 13 captures images of the steel pipe 4 end in real time and transmits them to the data processing terminal 12. The data processing terminal 12 analyzes the images to obtain the distance between the grooved position and the end face of the steel pipe 4. When the obtained distance does not meet the requirements, the data processing terminal 12 analyzes and determines the set distance that the end of the steel pipe 4 needs to be cut. The control terminal 9 sends a signal to the servo hydraulic station 8 to control the servo hydraulic station 8 to work. The servo hydraulic station 8 controls the hollow hydraulic cylinder 11 to work. The piston rod of the hollow hydraulic cylinder 11 drives the annular positioning disk 10 to move. The cutting tool cuts the end of the steel pipe 4. When the grating ruler detects that the piston rod of the hollow hydraulic cylinder 11 has moved to the set distance, the piston rod of the hollow hydraulic cylinder 11 stops moving. In this way, the distance between the end face of the steel pipe and the groove is always kept within the set range.

[0047] The steel pipe grooving machine of this embodiment performs grooving and end-slitting simultaneously, eliminating the need for secondary end-slitting or grinding of the steel pipe ends. This eliminates the need for secondary end-slitting or grinding processes, ensuring grooving quality, dimensional accuracy, and preventing pipe end tilting. This improves the production efficiency of steel pipe grooving. Furthermore, the entire process is automated through the use of a grating ruler and an infrared camera, saving manpower.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A steel pipe grooving machine with integrated flat-end function, comprising a housing, a power system disposed within the housing, the power system being connected to the lower pressure roller via a lower pressure roller main shaft, an upper pressure roller being disposed above the lower pressure roller, the upper pressure roller being connected to a lifting hydraulic cylinder fixed to the housing, and an annular positioning disc coaxially disposed on one side of the lower pressure roller and sleeved around the outer circumference of the lower pressure roller main shaft, characterized in that, The annular positioning disc is equipped with multiple cutting tools on its disc surface near the lower pressure roller to cut the end of the steel pipe. The annular positioning disc is connected to the telescopic drive component to achieve movement along the axis of the lower pressure roller, so that the distance between the end face of the steel pipe and the groove is always kept within the set range. The groove is pressed at the same time as the end face is flattened, eliminating the need for secondary flattening or secondary grinding of the end face of the steel pipe, thus saving the secondary flattening or secondary grinding process. The telescopic drive component uses a hollow hydraulic cylinder. The main shaft of the lower pressure wheel passes through the internal cavity of the hollow hydraulic cylinder, and the piston rod of the hollow hydraulic cylinder is connected to the annular positioning plate.

2. The steel pipe grooving machine with integrated flat-end function as described in claim 1, characterized in that, It also includes an image acquisition element, which is set on one side of the lower pressure roller and is used to acquire images of the pipe end between the upper and lower pressure rollers. The image acquisition element is connected to the control system and can transmit the acquired image information to the control system.

3. A steel pipe grooving machine with integrated flat-end function as described in claim 2, characterized in that, The image acquisition element is an infrared camera, which is connected to a data processing terminal.

4. A steel pipe grooving machine with integrated flat-end function as described in claim 1, characterized in that, The telescopic drive component is equipped with a displacement detection element to detect the displacement of its moving part.

5. A steel pipe grooving machine with integrated flat-end function as described in claim 4, characterized in that, The displacement detection element is a grating ruler. The reading head of the grating ruler is fixed to the fixed part of the telescopic drive component, and the main scale of the grating ruler is installed on the moving part of the telescopic drive component.

6. A steel pipe grooving machine with integrated flat-end function as described in claim 1, characterized in that, The lifting hydraulic cylinder and the hollow hydraulic cylinder are connected to the servo hydraulic station via oil circuits, and their operation is controlled by the servo hydraulic station.

7. A steel pipe grooving machine with integrated flat-end function as described in claim 1, characterized in that, The piston rod of the lifting hydraulic cylinder is connected to the wheel frame, and the wheel frame is rotatably connected to the upper pressure wheel. The wheel surface of the upper pressure wheel is provided with annular protrusions to form annular grooves at the end of the steel pipe. Correspondingly, the wheel surface of the lower pressure wheel is provided with annular grooves that match the annular protrusions.

8. A steel pipe grooving machine with integrated flat-end function as described in claim 1, characterized in that, The cutting tool is made of high-speed steel or cemented carbide.

9. A method for a steel pipe grooving machine with integrated flat-end function as described in any one of claims 1-8, characterized in that: Driven by the power system, the lower pressure roller rotates, which in turn drives the steel pipe surrounding it to rotate. The upper pressure roller, driven by the lifting hydraulic cylinder, applies downward pressure to the steel pipe. While rotating with the steel pipe, it grooves the end of the steel pipe. The telescopic drive unit drives the cutting tool of the annular positioning disc to always be in contact with the end face of the steel pipe. During the grooving process, the end face of the steel pipe is cut, so that the distance between the grooved position and the end face of the steel pipe is kept within a set range.

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