High-precision seamless steel tube outer wall polishing and paint spraying device and process

Abstract

The invention provides a high-precision seamless steel tube outer wall polishing and paint spraying device and process, and particularly relates to the technical field of mechanical automation, the device comprises a rack, a driving rotating unit, a jacking unit, a paint spraying unit and a polishing unit, the driving rotating unit and the jacking unit are arranged at the two ends of the rack correspondingly and used for clamping and driving a seamless steel tube to rotate, and the polishing unit is used for polishing the seamless steel tube; the paint spraying unit and the grinding unit share an axial lead screw module and can move in a reciprocating mode in the axial direction of a steel pipe, the grinding unit achieves lifting feeding through a vertical lead screw module, an electric grinding wheel is adopted to conduct high-precision grinding on the outer wall of the steel pipe, and the paint spraying unit completes outer wall spraying following the grinding procedure. Grinding and paint spraying integrated continuous operation is achieved, the structure is compact, positioning is accurate, the machining efficiency is high, the outer wall treatment precision and surface quality of the seamless steel pipe can be effectively improved, and the device is suitable for automatic surface treatment of the high-precision seamless steel pipe.

Description

Technical Field

[0001] This invention provides a high-precision seamless steel pipe outer wall grinding and painting device and process, specifically relating to the field of mechanical automation technology. Background Technology

[0002] Currently, for the surface treatment of the outer wall of seamless steel pipes, traditional processing methods mostly adopt independent processes such as manual grinding and segmented painting, which generally suffer from technical defects such as low automation, poor processing accuracy, low production efficiency, and difficulty in ensuring product consistency. Summary of the Invention

[0003] In view of the deficiencies of the existing technology, the present invention provides a high-precision seamless steel pipe outer wall grinding and painting device and process, which can effectively solve the related technical problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A high-precision seamless steel pipe outer wall grinding and painting device, comprising:

[0005] The frame includes a bottom support frame and an upper worktable; An active rotation unit is fixedly installed at one end of the upper worktable and is used to drive the seamless steel pipe to rotate around its own axis. A clamping unit is fixedly installed at the other end of the upper worktable and is used to cooperate with the active rotation unit to perform axial clamping and radial positioning of the seamless steel pipe. A painting unit is fixedly installed on one side of the upper workbench; A grinding unit is slidably mounted on the second lead screw module slide of the painting unit, and can reciprocate along the axial direction of the seamless steel pipe to perform grinding operations on the outer wall of the rotating seamless steel pipe.

[0006] Furthermore, the active rotation unit includes a lifting platform, a motor bracket, a rotary motor, and an internal expansion clamp. The lifting platform is fixed to the upper worktable, the bottom of the motor bracket is fixed to the platform of the lifting platform, the rotary motor is fixedly installed on the side plate of the motor bracket, one end of the internal expansion clamp is fastened to the output shaft of the rotary motor, and the other end is used to tighten the inner wall of the seamless steel pipe to drive the seamless steel pipe to rotate around its own axis.

[0007] Furthermore, the clamping unit includes a first lead screw module, a handle, a cylinder bracket, a clamping cylinder, and a clamping head. The first lead screw module is horizontally fixed on the upper worktable. The handle is fixed to one end of the lead screw of the first lead screw module for manual adjustment of the stroke. The base plate of the cylinder bracket is slidably mounted on the slide of the first lead screw module to reciprocate synchronously with the slide. The clamping cylinder is fixedly mounted on the side plate of the cylinder bracket. The clamping head is fixedly connected to the front end of the piston rod of the clamping cylinder for cooperating with the internal expansion clamp of the active rotation unit to perform axial clamping and positioning of the seamless steel pipe.

[0008] Furthermore, the first lead screw module is equipped with a protective plate.

[0009] Furthermore, the painting unit includes a lead screw module fixing base, a second lead screw module, a nozzle mounting base, a nozzle, and a quick-release connector. The lead screw module fixing base is fixedly installed on the upper worktable. One side of the second lead screw module is installed on the lead screw module fixing base. The nozzle mounting base is slidably assembled on the slide of the second lead screw module. The nozzle and the quick-release connector are both fixed to the nozzle mounting base.

[0010] Furthermore, a first proximity sensor and a second proximity sensor are fixedly mounted on the slide of the second lead screw module.

[0011] Furthermore, the grinding unit includes a third lead screw module, an electric grinding wheel mounting base, and an electric grinding wheel. The third lead screw module is vertically mounted on the slide of the second lead screw module. The electric grinding wheel mounting base is fixedly connected to the slide of the third lead screw module, and the electric grinding wheel is fixedly mounted on the electric grinding wheel mounting base.

[0012] Furthermore, the process of the high-precision seamless steel pipe outer wall grinding and painting device includes the following steps: a. Loading and positioning: The seamless steel pipe is clamped between the active rotating unit and the clamping unit. The clamping unit clamps and positions the steel pipe axially, and the active rotating unit drives the steel pipe to rotate around its own axis. b. Outer wall grinding: The second lead screw module drives the grinding element to move axially. When the first proximity sensor detects the end of the steel pipe, the electric grinding wheel is started to continuously grind the rotating outer wall. c. Automatic painting: The painting unit moves axially, and the spray head is activated when the second proximity sensor detects the end of the steel pipe to spray evenly; d. Material unloading and resetting: After the painting is completed, the clamping unit is loosened, the finished seamless steel pipe is taken out, and the device is reset.

[0013] Compared with the known prior art, the technical solution provided by this invention has the following beneficial effects: Firstly, the process integration is high, realizing continuous automated operation of grinding and painting: This invention integrates the grinding unit and the painting unit on the same axial moving module, which can complete the outer wall grinding and painting treatment sequentially after the steel pipe is clamped and positioned once, eliminating the process transfer link, effectively avoiding secondary collisions and positioning deviations of the steel pipe, and significantly improving production efficiency and finished product consistency.

[0014] Secondly, the clamping and positioning are precise, ensuring the coaxiality of the steel pipe processing: the active rotation unit, together with the adjustable clamping unit, realizes the axial clamping and radial centering of the seamless steel pipe. Combined with the internal expansion clamp and the rotation drive structure, it ensures that the steel pipe rotates stably around its own axis, fundamentally improving the positional accuracy of grinding and painting, and meeting the processing requirements of high-precision seamless steel pipes.

[0015] Thirdly, the vertical lifting feed allows for controllable grinding feed and strong adaptability: the grinding unit uses a vertical screw module to achieve lifting feed, which can accurately control the contact depth and pressure between the grinding wheel and the outer wall of the steel pipe, adapting to seamless steel pipes of different diameters and specifications, avoiding uneven grinding, over-grinding or under-grinding caused by rigid impact, and improving the surface treatment quality. Attached Figure Description

[0016] Figure 1 This is a front-view three-dimensional structural diagram of the high-precision seamless steel pipe outer wall grinding and painting device proposed in this invention; Figure 2 This is a structural diagram of the active rotating unit of the high-precision seamless steel pipe outer wall grinding and painting device proposed in this invention; Figure 3 This is a structural diagram of the clamping unit of the high-precision seamless steel pipe outer wall grinding and painting device proposed in this invention; Figure 4 This is a schematic diagram of the protective plate of the high-precision seamless steel pipe outer wall grinding and painting device proposed in this invention; Figure 5 This is a structural diagram of the painting unit of the high-precision seamless steel pipe outer wall grinding and painting device proposed in this invention; Figure 6 This is a proximity sensor installation diagram for the high-precision seamless steel pipe outer wall grinding and painting device proposed in this invention; Figure 7 This is a structural diagram of the grinding unit of the high-precision seamless steel pipe outer wall grinding and painting device proposed in this invention.

[0017] The labels in the diagram represent: 1-Frame, 11-Bottom Support Frame, 12-Upper Worktable, 2-Active Rotation Unit, 21-Lifting Platform, 22-Motor Bracket, 23-Rotary Motor, 24-Internal Expansion Clamp, 3-Tightening Unit, 31-First Screw Module, 311-Protective Plate, 32-Handle, 33-Cylinder Bracket, 34-Tightening Cylinder, 35-Tightening Head, 4-Painting Unit, 41-Screw Module Fixing Base, 42-Second Screw Module, 421-First Proximity Sensor, 422-Second Proximity Sensor, 43-Spray Nozzle Mounting Base, 44-Spray Nozzle, 45-Quick-Release Connector, 5-Grinding Unit, 51-Third Screw Module, 52-Electric Grinding Wheel Mounting Base, 53-Electric Grinding Wheel. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments.

[0019] Existing seamless steel pipe outer wall processing equipment generally suffers from problems such as low automation, scattered structural layout, insufficient processing accuracy, and poor process continuity, as specifically manifested as follows: In traditional equipment structures, the grinding and painting mechanisms are often separate and independent units, making it impossible to achieve a continuous surface treatment process for the same workpiece at the same station. This leads to secondary collisions and positioning misalignments of the steel pipe during process transfer, severely affecting the accuracy of the outer wall treatment and the adhesion of the coating. Furthermore, existing grinding devices often use pneumatic grinding heads or rigid feed structures, which are difficult to adaptively compensate for the outer diameter tolerance and rotational runout of the steel pipe. This can easily result in uneven grinding, missed grinding, or over-grinding, failing to meet the surface quality requirements of high-precision seamless steel pipes.

[0020] Furthermore, traditional equipment lacks coordinated control of grinding feed, steel pipe rotation, axial movement, and painting operations. The various motion units operate independently with poor interoperability, increasing both the complexity of the equipment structure and its footprint. Mismatched action sequences can also lead to processing defects. Moreover, existing equipment generally lacks integrated positioning and protection structures, resulting in low steel pipe clamping and positioning accuracy. Grinding dust easily spreads and contaminates the painting surface, further reducing the finished product qualification rate and production safety.

[0021] To overcome the aforementioned drawbacks, the present invention employs the following embodiments to address the current situation.

[0022] Example 1: Reference Appendix Figure 1 This is a front-view three-dimensional structural diagram of a high-precision seamless steel pipe outer wall grinding and painting device, which includes: Frame 1, the frame includes a bottom support frame 11 and an upper worktable 12; Active rotation unit 2, which is fixedly installed at one end of the upper worktable 12, is used to drive the seamless steel pipe to rotate around its own axis; The clamping unit 3 is fixedly installed at the other end of the upper worktable 12 and is used to cooperate with the active rotation unit 2 to perform axial clamping and radial positioning of the seamless steel pipe. The painting unit 4 is fixedly installed on one side of the upper workbench 12; The grinding unit 5 is slidably mounted on the slide block of the second lead screw module 42 of the painting unit 4, and can reciprocate along the axial direction of the seamless steel pipe to perform grinding operations on the outer wall of the rotating seamless steel pipe.

[0023] In this example, frame 1 provides a stable installation foundation for the entire device, ensuring structural stability during operation of each unit. The clamping and rotation drive function, with active rotation unit 2 cooperating with clamping unit 3, achieves axial clamping and radial positioning of the seamless steel pipe, and drives the pipe to rotate stably around its own axis, providing the basic motion conditions for grinding and painting. The external wall painting function, with a fixed layout, follows the grinding process, completing the painting operation on the outer wall of the ground steel pipe. The external wall grinding function, with grinding unit 5 reciprocating along the steel pipe's axis, works in conjunction with the rotating pipe to complete automated external wall grinding. The integrated continuous operation function, with grinding unit 5 relying on the screw module movement of painting unit 4, enables grinding and painting to be completed continuously in a single clamping operation, eliminating the need for transfer operations and improving processing efficiency and accuracy.

[0024] like Figure 2 As shown, in another embodiment, the active rotation unit 2 includes a lifting platform 21, a motor bracket 22, a rotary motor 23, and an internal expansion clamp 24. The lifting platform 21 is fixed to the upper worktable 12, the bottom of the motor bracket 22 is fixed to the platform of the lifting platform 21, the rotary motor 23 is fixedly installed on the side plate of the motor bracket 22, one end of the internal expansion clamp 24 is fastened to the output shaft of the rotary motor 23, and the other end is used to tighten the inner wall of the seamless steel pipe to drive the seamless steel pipe to rotate around its own axis.

[0025] The lifting platform 21 can adjust the overall height of the active rotating unit 2 to align the central axis of seamless steel pipes of different diameters; the motor bracket 22 provides a secure mounting position for the rotary motor 23, ensuring that the motor operates without shaking or deviation; the rotary motor 23 provides stable power, driving the seamless steel pipe to rotate uniformly around its own axis; the internal expansion clamp 24 is tightened and fixed from the inner wall of the steel pipe, leaving no marks from the outer wall clamping, not affecting grinding and painting, while ensuring rotational coaxiality. The high-precision transmission function of the internal expansion clamp 24 is rigidly connected to the motor output shaft, ensuring precise power transmission, preventing slippage and jumping, and guaranteeing the accuracy of grinding and painting.

[0026] like Figure 3As shown, in one embodiment, the clamping unit 3 includes a first lead screw module 31, a handle 32, a cylinder bracket 33, a clamping cylinder 34, and a clamping head 35. The first lead screw module 31 is horizontally fixed on the upper worktable 12. The handle 32 is fixed to one end of the lead screw of the first lead screw module 31 for manual adjustment of the stroke. The base plate of the cylinder bracket 33 is slidably mounted on the slide of the first lead screw module 31 so as to reciprocate synchronously with the slide. The clamping cylinder 34 is fixedly mounted on the side plate of the cylinder bracket 33. The clamping head 35 is fixedly connected to the front end of the piston rod of the clamping cylinder 34 for cooperating with the internal expansion clamp 24 of the active rotation unit 2 to perform axial clamping and positioning of the seamless steel pipe.

[0027] The first lead screw modules 31 and 32 can be coarsely adjusted to the clamping starting point according to the length of the steel pipe, adapting to seamless steel pipes of different lengths. The clamping cylinder 34 pushes the clamping head 35 to achieve automatic and flexible axial clamping, avoiding rigid impact damage to the steel pipe. The cylinder bracket 33 moves with the lead screw module slide to ensure that the clamping head 35 is always aligned with the end face of the steel pipe. The clamping unit 3, together with the centering clamping head 35, is paired with the internal expansion clamp 24 of the active rotation unit 2 to ensure that the rotation axis of the steel pipe is coaxial, improving the accuracy of grinding and painting.

[0028] like Figure 4 As shown, in one embodiment, the first lead screw module 31 is provided with a protective plate 311.

[0029] The 311 protective plate prevents grinding dust, paint mist, and impurities from entering the screw module, thus avoiding jamming and wear.

[0030] like Figure 5 As shown, in one embodiment, the painting unit 4 includes a lead screw module fixing base 41, a second lead screw module 42, a nozzle mounting base 43, a nozzle 44, and a quick-release connector 45. The lead screw module fixing base 41 is fixedly installed on the upper worktable 12. One side of the second lead screw module 42 is installed on the lead screw module fixing base 41. The nozzle mounting base 43 is slidably assembled on the slide of the second lead screw module 42. The nozzle 44 and the quick-release connector 45 are both fixed to the nozzle mounting base 43.

[0031] The lead screw module fixing base 41 provides a rigid mounting foundation for the entire painting unit 4, ensuring no deviation during operation; the second lead screw module 42 drives the nozzle 44 to move smoothly along the axial direction of the steel pipe, achieving uniform spraying throughout the process; the nozzle mounting seat 43 is used to fix the nozzle 44, ensuring stable spraying angle and position; the quick-release connector 45 enables quick disassembly and assembly of the paint tube, facilitating color change, cleaning, and maintenance. The painting unit 4, in conjunction with the rotating steel pipe, completes automated painting of the entire outer wall without any missed areas.

[0032] like Figure 6As shown, in one embodiment, a first proximity sensor 421 and a second proximity sensor 422 are fixedly disposed on the slide of the second lead screw module 42.

[0033] The first proximity sensor 421 is used to detect the steel pipe's arrival and trigger the grinding unit 5 to start operation; the second proximity sensor 422 is used to detect the steel pipe's arrival and trigger the painting unit 4 to start spraying. The two sensors work together to control the timing, allowing grinding and painting to automatically take over without manual intervention.

[0034] like Figure 7 As shown, in one embodiment, the grinding unit 5 includes a third lead screw module 51, an electric grinding wheel mounting base 52, and an electric grinding wheel 53. The third lead screw module 51 is vertically mounted on the slide of the second lead screw module 42. The electric grinding wheel mounting base 52 is fixedly connected to the slide of the third lead screw module 51, and the electric grinding wheel 53 is fixedly mounted on the electric grinding wheel mounting base 52.

[0035] The third lead screw module 51 is vertically installed and can precisely control the lifting and lowering of the electric grinding wheel 53, adjust the grinding depth and pressure, and adapt to different pipe diameters; the electric grinding wheel mounting seat 52 provides a stable mounting position for the grinding wheel, ensuring that it does not shake or shift during grinding; the electric grinding wheel 53 directly performs high-precision and uniform grinding on the outer wall of the rotating steel pipe to remove burrs and oxide layers; the grinding unit 5 moves along the slide of the second lead screw module 42 to achieve continuous grinding along the entire length of the steel pipe.

[0036] In one embodiment, the high-precision seamless steel pipe outer wall grinding and painting device process includes the following steps: a. Loading and positioning: The seamless steel pipe is clamped between the active rotating unit and the clamping unit. The clamping unit clamps and positions the steel pipe axially, and the active rotating unit drives the steel pipe to rotate around its own axis. b. Outer wall grinding: The second lead screw module drives the grinding element to move axially. When the first proximity sensor detects the end of the steel pipe, the electric grinding wheel is started to continuously grind the rotating outer wall. c. Automatic painting: The painting unit moves axially, and the spray head is activated when the second proximity sensor detects the end of the steel pipe to spray evenly; d. Material unloading and resetting: After the painting is completed, the clamping unit is loosened, the finished seamless steel pipe is taken out, and the device is reset.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision seamless steel pipe outer wall grinding and painting device, characterized in that, include: The frame (1) includes a bottom support frame (11) and an upper worktable (12). Active rotation unit (2), which is fixedly installed at one end of the upper worktable (12) and is used to drive the seamless steel pipe to rotate around its own axis; The clamping unit (3) is fixedly installed at the other end of the upper worktable (12) and is used to cooperate with the active rotation unit (2) to clamp the seamless steel pipe axially and position it radially. The painting unit (4) is fixedly installed on one side of the upper workbench (12); The grinding unit (5) is slidably mounted on the slide of the second screw module (42) of the painting unit (4), and can reciprocate along the axial direction of the seamless steel pipe to perform grinding operations on the outer wall of the rotating seamless steel pipe.

2. The high-precision seamless steel pipe outer wall grinding and painting device according to claim 1, characterized in that, The active rotation unit (2) includes a lifting platform (21), a motor bracket (22), a rotary motor (23), and an internal expansion clamp (24). The lifting platform (21) is fixed to the upper worktable (12). The bottom of the motor bracket (22) is fixed to the platform of the lifting platform (21). The rotary motor (23) is fixedly installed on the side plate of the motor bracket (22). One end of the internal expansion clamp (24) is fastened to the output shaft of the rotary motor (23), and the other end is used to tighten the inner wall of the seamless steel pipe to drive the seamless steel pipe to rotate around its own axis.

3. The high-precision seamless steel pipe outer wall grinding and painting device according to claim 1, characterized in that, The clamping unit (3) includes a first lead screw module (31), a handle (32), a cylinder bracket (33), a clamping cylinder (34), and a clamping head (35). The first lead screw module (31) is horizontally fixed on the upper worktable (12). The handle (32) is fixed to one end of the lead screw of the first lead screw module (31) for manual adjustment of the stroke. The base plate of the cylinder bracket (33) is slidably installed on the slide of the first lead screw module (31) so as to move synchronously with the slide. The clamping cylinder (34) is fixedly installed on the side plate of the cylinder bracket (33). The clamping head (35) is fixedly connected to the front end of the piston rod of the clamping cylinder (34) for cooperating with the internal expansion clamp (24) of the active rotation unit (2) to perform axial clamping and positioning of the seamless steel pipe.

4. The high-precision seamless steel pipe outer wall grinding and painting device according to claim 3, characterized in that, The first lead screw module (31) is provided with a protective plate (311).

5. The high-precision seamless steel pipe outer wall grinding and painting device according to claim 1, characterized in that, The painting unit (4) includes a lead screw module fixing base (41), a second lead screw module (42), a nozzle mounting base (43), a nozzle (44), and a quick-release connector (45). The lead screw module fixing base (41) is fixedly installed on the upper worktable (12). One side of the second lead screw module (42) is installed on the lead screw module fixing base (41). The nozzle mounting base (43) is slidably assembled on the slide of the second lead screw module (42). The nozzle (44) and the quick-release connector (45) are both fixed on the nozzle mounting base (43).

6. The high-precision seamless steel pipe outer wall grinding and painting device according to claim 5, characterized in that, The second lead screw module (42) has a first proximity sensor (421) and a second proximity sensor (422) fixedly mounted on its slide.

7. The high-precision seamless steel pipe outer wall grinding and painting device according to claim 1, characterized in that, The grinding unit (5) includes a third lead screw module (51), an electric grinding wheel mounting base (52), and an electric grinding wheel (53). The third lead screw module (51) is vertically mounted on the slide of the second lead screw module (42). The electric grinding wheel mounting base (52) is fixedly connected to the slide of the third lead screw module (51). The electric grinding wheel (53) is fixedly mounted on the electric grinding wheel mounting base (52).

8. A high-precision seamless steel pipe outer wall grinding and painting process, characterized in that... The high-precision seamless steel pipe outer wall grinding and painting device according to claim 1 includes the following steps: a. Loading and positioning: The seamless steel pipe is clamped between the active rotating unit and the clamping unit. The clamping unit clamps and positions the steel pipe axially, and the active rotating unit drives the steel pipe to rotate around its own axis. b. Outer wall grinding: The second lead screw module drives the grinding element to move axially. When the first proximity sensor detects the end of the steel pipe, the electric grinding wheel is started to continuously grind the rotating outer wall. c. Automatic painting: The painting unit moves axially, and the spray head is activated when the second proximity sensor detects the end of the steel pipe to spray evenly; d. Material unloading and resetting: After the painting is completed, the clamping unit is loosened, the finished seamless steel pipe is taken out, and the device is reset.

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