Automatic rotary polishing equipment for high-precision stainless steel pipe surface treatment

Abstract

The application relates to the technical field of steel pipe grinding, and discloses automatic rotary polishing equipment for high-precision stainless steel pipe surface treatment, which comprises a polisher main body and a clamping mechanism arranged on the top of the polisher main body. The clamping mechanism comprises a supporting plate arranged on the top of the polisher main body, a circular groove arranged on the top of the supporting plate, a rotating drum arranged on one side of the supporting plate close to the circular groove, one side of the rotating drum close to the supporting plate being rotationally connected with the circular groove, an annular groove arranged on one side of the rotating drum close to the circular groove, a driving ring arranged in the annular groove, a worm arranged on the rotating drum close to the driving ring, three annular arrayed special-shaped holes arranged on one side of the rotating drum away from the circular groove, a sleeve arranged on the inner wall of one side of the special-shaped hole away from the circular groove, and a driving groove arranged on the inner wall of the sleeve. The clamping mechanism can meet the clamping requirements of the inner wall and the outer wall of the stainless steel pipe, and the contact points between the clamping mechanism and the stainless steel pipe are increased to enhance the clamping stability.

Description

Automatic rotary grinding equipment for high-precision stainless steel pipe surface treatment Technical Field

[0001] This invention relates to the field of steel pipe grinding technology, and in particular to an automatic rotary grinding device for high-precision stainless steel pipe surface treatment. Background Technology

[0002] Automatic rotary grinding equipment is a core component for improving the surface quality of high-precision stainless steel pipes. It uses a high-speed rotating grinding wheel to perform uniform and continuous automated processing on the pipe material. The equipment employs a multi-axis linkage structure and a precision control system, allowing for flexible adjustment of the grinding wheel's rotation speed, feed rate, and pressure to ensure a stable and controllable processing flow. In the rough grinding stage, the equipment effectively removes the oxide layer, burrs, and other minor imperfections from the pipe surface. In the fine polishing stage, the synergistic effect of the fine grinding wheel and polishing media gradually improves the surface microstructure, achieving integrated processing from rough grinding to fine polishing. The entire process not only significantly improves the surface smoothness and flatness of the pipe but also optimizes its overall appearance. Simultaneously, the treated pipe surface is denser, significantly enhancing its corrosion resistance and extending its service life. With its high efficiency, precision, and stability, this equipment is widely used in industries with stringent surface quality requirements, such as aerospace, medical devices, and food processing, becoming an indispensable piece of equipment in modern high-end manufacturing.

[0003] Traditional grinding machines are widely used in stainless steel pipe processing, but due to limitations in their structure and working principle, they often present some significant problems. Traditional equipment has obvious defects when processing steel pipes, mainly in two aspects. First, it cannot guarantee concentricity. These machines typically use rollers to support the steel pipe, relying on friction to drive its rotation. This loose support method makes it difficult to achieve precise axial positioning and effective constraint of the steel pipe. Under the action of high-speed rotation and grinding force, the steel pipe is prone to radial runout and axial movement, resulting in uneven distribution of grinding material, damaging the original roundness and concentricity of the steel pipe, and consequently causing deviations in pipe wall thickness, seriously affecting subsequent assembly accuracy and performance. Second, due to the lack of effective fixation, when grinding the inner wall of the steel pipe, the grinding tool must be inserted into the pipe. If the steel pipe is not securely clamped, the reaction force generated when the tool contacts the pipe wall will immediately cause the steel pipe to shift, rotate, or even be thrown away. This not only makes the grinding operation impossible but also poses serious safety hazards. This limits the application of the equipment in the field of high-precision steel pipe processing. These shortcomings mean that traditional equipment can no longer meet the requirements of modern industry for high-precision, high-efficiency, and high-safety processing. Summary of the Invention

[0004] Given the existing technical problems of grinding machines lacking effective fixation of workpieces, which affects the concentricity of workpieces, an automatic rotary grinding device for high-precision stainless steel pipe surface treatment is proposed.

[0005] Its purpose is to enable the grinding machine to fix the workpiece and ensure the concentricity of the workpiece after grinding.

[0006] The technical solution of the present invention is an automatic rotary grinding device for high-precision stainless steel pipe surface treatment, including a grinding machine body and a clamping mechanism disposed on the top of the grinding machine body;

[0007] The clamping mechanism includes a support plate on the top of the grinding machine body, a circular groove on the top of the support plate, a rotating cylinder on the side of the support plate near the circular groove, the side of the rotating cylinder near the support plate being rotatably connected to the circular groove, an annular groove on the side of the rotating cylinder near the circular groove, a drive ring inside the annular groove, a worm gear on the rotating cylinder near the drive ring, three annular arrays of irregular holes on the side of the rotating cylinder away from the circular groove, a sleeve on the inner wall of the irregular holes away from the circular groove, a drive groove on the inner wall of the sleeve, three annular arrays of drive pins on the side of the drive ring near the circular groove, a main rotating arm on the outside of the rotating cylinder, a secondary rotating arm on the inner wall of the irregular holes away from the main rotating arm, a connecting rod on the side of the main rotating arm and the secondary rotating arm away from the irregular holes, and a reinforcing unit on the side of the connecting rod away from the secondary rotating arm.

[0008] The support plate restricts the rotational freedom of the circular groove. The drive ring can only rotate along the groove. The worm gear drives the drive ring to rotate. The irregular hole forms a channel to accommodate the reinforcement unit. The drive ring drives the sleeve to rotate through the drive pin and drive groove. The sleeve drives the main rotating arm to rotate. The main rotating arm drives the secondary rotating arm to rotate through the connecting rod. The connecting rod remains horizontal as it rotates with the main rotating arm and the secondary rotating arm.

[0009] Furthermore, the drive ring is provided with several drive teeth near the worm, and the drive teeth are engaged with the worm.

[0010] Furthermore, an arc-shaped rod is provided at one end of the connecting rod near the reinforcement unit, and the arc-shaped rod is fixedly connected to the reinforcement unit.

[0011] Furthermore, a square hole is provided near the secondary rotating arm of the irregular hole, and the width of the square hole is greater than the width of the reinforcing unit.

[0012] Furthermore, the reinforcement unit includes a housing disposed at the end of the connecting rod away from the secondary rotating arm, a telescopic rod disposed inside the housing, a cross plate disposed on the side of the telescopic rod near the connecting rod, springs symmetrically disposed at the top and bottom of the cross plate, with the two ends of the springs fixedly connected to the inner walls of the cross plate and the housing respectively, a pressure rod disposed at the middle of the side of the telescopic rod away from the cross rod, side holes symmetrically opened on both sides of the housing, a support shaft disposed at the middle of the side holes, a swing arm disposed on the outside of the support shaft, an elongated hole opened at the end of the swing arm near the telescopic rod, with the inner wall of the elongated hole slidably connected to the pressure rod, and clamping blocks symmetrically disposed on the side of the swing arm away from the pressure rod.

[0013] Furthermore, a limiting hole is provided in the middle of the swing arm, and the inner wall of the limiting hole is rotatably connected to the support shaft.

[0014] Furthermore, a sliding hole is provided on the side of the outer casing away from the connecting rod, and the inner wall of the sliding hole is slidably connected to the pressure rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up a clamping mechanism, it can adapt to the clamping requirements of the inner and outer walls of stainless steel pipes. During operation, the clamping mechanism expands from the inside or clamps the pipe from the outside, forming a fixed constraint on the workpiece. This fixing method counteracts the rotational force and vibration during the grinding process, prevents the workpiece from shifting or deflecting, and keeps the central axis of the workpiece and the rotation axis of the grinding wheel coincide. During rotational grinding, the material is removed evenly. The inner wall clamping is suitable for workpieces with pipe diameters that allow the tool to enter, while the outer wall clamping is suitable for various pipe diameter specifications. The stable clamping state allows the grinding wheel to travel along a fixed path, ensuring the consistency of grinding the entire circumference of the pipe. This mechanism improves the positioning accuracy of the workpiece, so that the concentricity of the ground pipe meets the processing requirements.

[0017] 2. By setting up reinforcement units, the number of contact points between the clamping mechanism and the stainless steel tube is increased to enhance clamping stability. Multiple contact points are distributed along the surface of the tube to form a balanced constraint force, reducing the displacement or vibration of the workpiece during the grinding process. The increase in contact points expands the clamping coverage area, allowing the tube to maintain a constant position when subjected to rotational force, thereby improving the stability of the grinding operation.

[0018] 3. By setting clamping blocks and swing arms, the system can adapt to the clamping needs of stainless steel pipes of different diameters. The clamping blocks contact the outer surface of the pipe, and their swing angle changes with the force angle between them and the pipe, so that the clamping force is evenly applied to the pipe wall and the contact surface matches the curvature of the pipe. This design allows the clamping mechanism to fix various specifications of pipes without changing parts. The close contact between the clamping blocks and the pipe wall reduces local stress and avoids workpiece deformation. The flexibility of the swing arms allows the clamping mechanism to quickly adapt to diameter differences and ensures clamping stability. During the grinding process, the center position of the pipe remains consistent, which helps to maintain processing accuracy and improve the versatility of the equipment. Attached Figure Description

[0019] Figure 1 is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 is a schematic diagram of the overall structure of the clamping mechanism of the present invention;

[0021] Figure 3 is an exploded view of the clamping mechanism of the present invention;

[0022] Figure 4 is a schematic diagram of the connection between the drive ring and the rotating drum of the present invention;

[0023] Figure 5 is a schematic diagram of the connection between the drive ring and the worm gear of the present invention;

[0024] Figure 6 is a schematic diagram of the connection between the drive pin and the drive ring of the present invention;

[0025] Figure 7 is a schematic diagram of the internal structure of the sleeve of the present invention;

[0026] Figure 8 is a schematic diagram of the connection between the main rotating arm and the connecting rod of the present invention;

[0027] Figure 9 is a schematic diagram of the overall structure of the reinforcement unit of the present invention;

[0028] Figure 10 is a schematic diagram of the internal structure of the outer shell of the present invention;

[0029] Figure 11 is a schematic diagram of the connection between the pressure rod and the swing arm of the present invention;

[0030] Figure 12 is a schematic diagram of the swing arm structure of the present invention.

[0031] In the picture:

[0032] 1. Grinding machine body; 2. Clamping mechanism; 21. Support plate; 22. Circular groove; 23. Rotary drum; 24. Annular groove; 25. Drive ring; 26. Worm gear; 27. Irregular hole; 28. Sleeve; 29. ​​Drive groove; 210. Drive pin; 211. Main rotating arm; 212. Secondary rotating arm; 213. Connecting rod; 214. Outer shell; 215. Telescopic rod; 216. Horizontal plate; 217. Spring; 218. Pressure rod; 219. Side hole; 220. Support shaft; 221. Swing arm; 222. Long hole; 223. Clamping block. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Example 1

[0035] Referring to Figures 1-12, the first embodiment of the present invention provides an automatic rotary grinding device for high-precision stainless steel pipe surface treatment, including a grinding machine body 1 and a clamping mechanism 2 installed on the top of the grinding machine body 1. The clamping mechanism 2 includes a support plate 21 fixedly connected to the top of the grinding machine body 1, a circular groove 22 formed on the top of the support plate 21, a rotating cylinder 23 rotatably connected to the side of the support plate 21 near the circular groove 22, the side of the rotating cylinder 23 near the support plate 21 being rotatably connected to the circular groove 22, an annular groove 24 formed on the side of the rotating cylinder 23 near the circular groove 22, a drive ring 25 rotatably connected inside the annular groove 24, a worm gear 26 rotatably connected to the rotating cylinder 23 near the drive ring 25, three annular arrays of irregular holes 27 formed on the side of the rotating cylinder 23 away from the circular groove 22, a sleeve 28 rotatably connected to the inner wall of the irregular hole 27 away from the circular groove 22, and a drive groove 29 formed on the inner wall of the sleeve 28. A drive pin 210 is fixedly connected to the drive ring 25 near the circular groove 22; a main rotating arm 211 is fixedly connected to the outside of the rotating drum 23; a secondary rotating arm 212 is rotatably connected to the inner wall of the irregular hole 27 away from the main rotating arm 211; a connecting rod 213 is rotatably connected to the main rotating arm 211 and the secondary rotating arm 212 at the end away from the irregular hole 27; and a reinforcing unit is assembled at the end of the connecting rod 213 away from the secondary rotating arm 212; the support plate 21 is constrained to rotate by the circular groove 22. With a degree of freedom of motion, the drive ring 25 can only rotate along the ring groove 24. The worm gear 26 drives the drive ring 25 to rotate. The irregular hole 27 forms a channel to accommodate the passage of the reinforcement unit. The drive ring 25 drives the sleeve 28 to rotate through the drive pin 210 and the drive groove 29. The sleeve 28 drives the main rotating arm 211 to rotate. The main rotating arm 211 drives the secondary rotating arm 212 to rotate through the connecting rod 213. The connecting rod 213 always remains horizontal when rotating with the main rotating arm 211 and the secondary rotating arm 212.

[0036] Specifically, the support plate 21 cooperates with the rotating cylinder 23 through the circular groove 22 to limit the rotating cylinder 23, so that the rotating cylinder 23 can only rotate in place. By rotating the worm gear 26, the drive ring 25 can be rotated. When the drive ring 25 rotates, it drives the drive pin 210 to rotate synchronously. After the drive pin 210 rotates, it presses the drive groove 29 that it cooperates with, so that the corresponding sleeve 28 rotates. When the sleeve 28 rotates, it drives the main rotating arm 211 to rotate together. The main rotating arm 211 transmits the force to the secondary rotating arm 212 through the connecting rod 213, so that the secondary rotating arm 212 rotates synchronously. Since the main rotating arm 211 and the secondary rotating arm 212 have the same length, the connecting rod 213 is kept horizontal when it rotates. When the connecting rod 213 rotates, it will drive the reinforcement unit to pass through the irregular hole 27.

[0037] Referring to Figures 4 and 5, the drive ring 25 is provided with several drive teeth near the worm 26, and the drive teeth are meshed with the worm 26.

[0038] Specifically, the worm 26 meshes with the drive teeth. When the worm 26 rotates, it drives the drive ring 25 to rotate through the drive teeth. The drive ring 25 is constrained by the ring groove 24, so it can only rotate in place.

[0039] Referring to Figures 4 and 8, an arc-shaped rod is provided at one end of the connecting rod 213 near the reinforcement unit, and the arc-shaped rod is fixedly connected to the reinforcement unit.

[0040] Specifically, the connecting rod 213 transmits the force to the outer shell 214 through the arc-shaped rod, causing the entire reinforcement unit to rotate together with the connecting rod 213.

[0041] Referring to Figures 4 and 8, the irregular hole 27 has a square hole near the secondary rotating arm 212, and the width of the square hole is greater than the width of the reinforcing unit.

[0042] Specifically, the reinforcement unit will pass through the square hole position along the path of the connecting rod 213. The size of the square hole is large enough to allow the reinforcement unit to pass through, so as to avoid interfering with the movement of the reinforcement unit.

[0043] Example 2

[0044] Referring to Figures 1-12, this is the second embodiment of the present invention. This embodiment differs from the first embodiment in that the reinforcing unit includes a housing 214 fixedly connected to the end of the connecting rod 213 away from the secondary rotating arm 212, a telescopic rod 215 slidably connected inside the housing 214, a horizontal plate 216 fixedly connected to the telescopic rod 215 near the connecting rod 213, and springs 217 symmetrically fixedly connected to the top and bottom of the horizontal plate 216. The two ends of the springs 217 are respectively connected to the horizontal plate 216 and the housing 214. The inner wall is fixedly connected to a pressure rod 218 fixedly connected to the middle of the side of the telescopic rod 215 away from the crossbar, side holes 219 symmetrically opened on both sides of the outer shell 214, a support shaft 220 fixedly connected to the middle of the side holes 219, a swing arm 221 rotatably connected to the outside of the support shaft 220, an elongated hole 222 opened at the end of the swing arm 221 near the telescopic rod 215, the inner wall of the elongated hole 222 is slidably connected to the pressure rod 218, and a clamping block 223 symmetrically rotatably connected to the side of the swing arm 221 away from the pressure rod 218.

[0045] Specifically, when the outer casing 214 rotates towards the workpiece with the rotating arm, the telescopic rod 215 is slightly longer than the swing arm 221. Therefore, the end of the telescopic rod 215 will first contact the surface of the workpiece. After being stressed, the spring 217 stores force, and the telescopic rod 215 drives the pressure rod 218 to move synchronously. The pressure rod 218 squeezes the swing arm 221 through the elongated hole 222, causing the swing arm 221 to drive the clamping block 223 to rotate towards the workpiece. Since the swing arm 221 is constrained by the support shaft 220, it will rotate around the support shaft 220 after being stressed. The connection between the clamping block 223 and the swing arm 221 can rotate. Therefore, after the clamping block 223 contacts the workpiece, it will rotate relative to the swing arm 221 to accommodate stainless steel pipes of different diameters. After the telescopic rod 215 releases contact with the workpiece, the spring 217 resets the telescopic rod 215 and the swing arm 221.

[0046] Referring to Figures 10-12, a limiting hole is provided in the middle of the swing arm 221, and the inner wall of the limiting hole is rotatably connected to the support shaft 220.

[0047] Specifically, the swing arm 221 is connected to the support shaft 220 through the limiting hole, and the swing arm 221 will rotate around the support shaft 220 after being subjected to force.

[0048] Referring to Figures 9 and 10, a sliding hole is provided on the side of the housing 214 away from the connecting rod 213, and the inner wall of the sliding hole is slidably connected to the pressure rod 218.

[0049] Specifically, the outer shell 214 constrains the telescopic rod 215 through a sliding hole, so that the telescopic rod 215 can only move along the axis and does not have the freedom of rotation. The rest of the structure is the same as that of Embodiment 1.

[0050] Based on embodiments 1-2, the working principle of this invention is as follows: The workpiece is placed on the worktable of the grinding machine. When grinding the outer wall of the workpiece, the inner wall needs to be clamped. The worm gear 26 drives the drive ring 25 to rotate, causing the three sleeves 28 and the corresponding main rotating arms 211 to rotate, bringing the three reinforcing units closer together. Then, the workpiece is brought close to the reinforcing units, placing them within the workpiece's inner cavity. At this time, the three main rotating arms 211 move away from each other. Simultaneously, the main rotating arms 211 move, driving the outer shell 214 to move. The outer shell 214 then drives the swing arm 221 and the telescopic rod 215 to move. When the telescopic rod 215 contacts the workpiece, the drive rod, through the pressure rod 218, presses the swing arm 221, causing the swing arm 221 to drive the clamping block 223 to clamp the workpiece. The clamping block 223 is subjected to… After the workpiece is squeezed, it rotates, causing the side away from the swing arm 221 to face the axis of the workpiece. This increases the clamping stability and allows the workpiece to be adapted to different diameters by utilizing its own rotation amplitude. While the workpiece is being ground, the rotating cylinder 23 rotates with the workpiece, while also constraining the workpiece's degree of freedom, ensuring that it always rotates around its own axis. After the workpiece is released from clamping, the telescopic rod 215 no longer contacts the workpiece, and the spring 217 resets the telescopic rod 215 and the swing arm 221. When grinding the inner wall of the workpiece, it is necessary to clamp the outer wall of the workpiece. The main rotating arm 211 is reversed in the same way. The main rotating arm 211 drives the reinforcement unit through the irregular hole 27 via the connecting rod 213 to the outside of the workpiece. The outer wall of the workpiece is clamped using the same principle as above.

[0051] It should be noted that 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic rotary grinding device for high-precision stainless steel pipe surface treatment, comprising a grinding machine body (1), characterized in that: It also includes a clamping mechanism (2) disposed on the top of the grinding machine body (1); the clamping mechanism (2) includes a support plate (21) disposed on the top of the grinding machine body (1), a circular groove (22) opened on the top of the support plate (21), a rotating cylinder (23) disposed on the side of the support plate (21) near the circular groove (22), the side of the rotating cylinder (23) near the support plate (21) being rotatably connected to the circular groove (22), and an annular groove (24) opened on the side of the rotating cylinder (23) near the circular groove (22). (24) An internal drive ring (25), a worm gear (26) located on the rotating cylinder (23) near the drive ring (25), three annular arrays of irregular holes (27) on the side of the rotating cylinder (23) away from the circular groove (22), a sleeve (28) located on the inner wall of the irregular hole (27) away from the circular groove (22), a drive groove (29) located on the inner wall of the sleeve (28), three annular arrays of drive pins (210) located on the side of the drive ring (25) near the circular groove (22), and a drive pin located on the side of the rotating cylinder (23) near the circular groove (22). The main rotating arm (211) on the outside of the rotating drum (23), the secondary rotating arm (212) set on the inner wall of the irregular hole (27) away from the main rotating arm (211), the connecting rod (213) set on the end of the main rotating arm (211) and the secondary rotating arm (212) away from the irregular hole (27), and the reinforcing unit set on the end of the connecting rod (213) away from the secondary rotating arm (212); the support plate (21) constrains the degree of freedom of rotation through the circular groove (22), and the driving ring (25) can only move along the annular groove (211). 4) Rotation: The worm gear (26) drives the drive ring (25) to rotate. The irregular hole (27) forms a channel to accommodate the reinforcement unit. The drive ring (25) drives the sleeve (28) to rotate through the drive pin (210) and drive groove (29). The sleeve (28) drives the main rotating arm (211) to rotate. The main rotating arm (211) drives the secondary rotating arm (212) to rotate through the connecting rod (213). The connecting rod (213) remains horizontal as the main rotating arm (211) and the secondary rotating arm (212) rotate.

2. The automatic rotary grinding equipment for high-precision stainless steel pipe surface treatment according to claim 1, characterized in that: The drive ring (25) has several drive teeth near the worm (26), and the drive teeth mesh with the worm (26).

3. The automatic rotary grinding equipment for high-precision stainless steel pipe surface treatment according to claim 1, characterized in that: The connecting rod (213) has an arc-shaped rod at one end near the reinforcement unit, and the arc-shaped rod is fixedly connected to the reinforcement unit.

4. The automatic rotary grinding equipment for high-precision stainless steel pipe surface treatment according to claim 1, characterized in that: The irregular hole (27) has a square hole near the secondary spiral arm (212), and the width of the square hole is greater than the width of the reinforcement unit.

5. The automatic rotary grinding equipment for high-precision stainless steel pipe surface treatment according to claim 1, characterized in that: The reinforcement unit includes a housing (214) disposed at the end of the connecting rod (213) away from the secondary rotating arm (212), a telescopic rod (215) disposed inside the housing (214), a horizontal plate (216) disposed on the side of the telescopic rod (215) near the connecting rod (213), and springs (217) symmetrically disposed at the top and bottom of the horizontal plate (216). The two ends of the springs (217) are fixedly connected to the inner walls of the horizontal plate (216) and the housing (214) respectively. The crossbar has a pressure bar (218) in the middle of one side, side holes (219) symmetrically opened on both sides of the outer shell (214), a support shaft (220) in the middle of the side hole (219), a swing arm (221) on the outside of the support shaft (220), an elongated hole (222) opened on the swing arm (221) near the telescopic rod (215), the inner wall of the elongated hole (222) is slidably connected to the pressure bar (218), and a clamping block (223) symmetrically arranged on the side of the swing arm (221) away from the pressure bar (218).

6. The automatic rotary grinding equipment for high-precision stainless steel pipe surface treatment according to claim 5, characterized in that: A limiting hole is provided in the middle of the swing arm (221), and the inner wall of the limiting hole is rotatably connected to the support shaft (220).

7. The automatic rotary grinding equipment for high-precision stainless steel pipe surface treatment according to claim 5, characterized in that: The outer casing (214) has a sliding hole on the side away from the connecting rod (213), and the inner wall of the sliding hole is slidably connected to the pressure rod (218).

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