Grinding and polishing all-in-one machine for metal pipe machining

Abstract

The invention discloses a grinding and polishing all-in-one machine for metal pipe machining, and relates to the technical field of metal material machining equipment.The grinding and polishing all-in-one machine comprises a base, and a grinding mounting cylinder is arranged in the middle of the table top of the base; the base is fixedly connected with mounting frames which are symmetrically distributed along the polishing mounting cylinder, and the inner side of the polishing mounting cylinder is rotationally connected with a rotating frame; a first motor is installed in the base, and an output shaft of the first motor is connected with the rotating frame through a belt transmission mechanism. According to the equipment, rapid centering is achieved through the arc-shaped positioning groove, and the equipment can be automatically attached to different pipe diameters in combination with a self-adaptive mechanism of the splayed guide frame and the torsional spring; the pressure is finely adjusted through the second screw, the parameters are locked through the first screw and the clamping frame structure, setting can be completed without manual measurement and experience simulation, the debugging time is greatly shortened, the operation threshold is lowered, and the switching efficiency of multi-specification pipe diameters and the equipment adaptability are improved.

Description

Technical Field

[0001] This invention relates to the field of metal material processing equipment technology, and in particular to an integrated grinding and polishing machine for metal pipe processing. Background Technology

[0002] Metal pipe processing grinding and polishing integrated machines are specialized equipment that combine grinding and polishing functions. They are widely used for surface treatment of various metal pipes such as stainless steel, copper, and aluminum alloys. This type of equipment can simultaneously complete processes such as rust removal, mirror polishing, and wire drawing, significantly reducing process changeover time and improving processing efficiency. It has significant application value in industries such as pipe fittings manufacturing, furniture, and construction.

[0003] Currently, common metal tube polishing equipment (such as planetary disc polishing machines) still has significant shortcomings in practical use. Taking existing technology as an example, when processing metal tubes of different diameters, planetary disc polishing machines require operators to manually measure the diameter and thickness parameters of key components (such as the planetary disc) and empirically simulate whether the workpiece can accurately pass through the center of the rotating disc. This process is not only tedious and time-consuming, but also requires a high level of professional experience from the operators. Each time the processing tube diameter is changed, the positioning and clamping mechanisms need to be readjusted, which seriously restricts the production adaptability and efficiency of the equipment. In addition, because manual adjustment makes it difficult to ensure path consistency, the workpiece is prone to positional deviation during polishing, resulting in uneven distribution of grinding pressure. This problem often leads to unstable surface treatment results, and even local over-polishing, under-polishing, or tube deformation due to friction overheating, seriously affecting the quality of finished products and processing consistency.

[0004] Based on the above situation, there is an urgent need for a new type of integrated grinding and polishing machine that can effectively overcome the above technical defects, achieve fast and accurate pipe diameter matching and stable processing, and improve the efficiency and quality of metal pipe surface treatment. Summary of the Invention

[0005] In order to overcome the shortcomings of existing planetary disc polishing machines, such as cumbersome adjustment when changing pipe diameter, reliance on manual experience, and easy occurrence of uneven polishing and workpiece deformation, this invention provides an integrated grinding and polishing machine for metal pipe processing.

[0006] A grinding and polishing integrated machine for processing metal tubes includes a base with a grinding mounting cylinder in the center of the base's table surface; mounting frames symmetrically distributed along the grinding mounting cylinder are fixed to the base, and their tops have arc-shaped positioning grooves for positioning metal tubes; a rotating frame is rotatably connected to the inner side of the grinding mounting cylinder; a first motor is installed inside the base, and the output shaft of the first motor is connected to the rotating frame via a belt drive mechanism; symmetrically distributed support frames are fixed to the inner side of the rotating frame, and each support frame is rotatably connected to symmetrically distributed guide frames arranged in a figure-eight shape; a torsion spring for providing a restoring force is connected between each guide frame and an adjacent support frame; a guide post is rotatably connected to the end of each guide frame, and a rotating rod is rotatably connected inside each support frame; a grinding belt for processing the metal tube is wound between two adjacent guide posts and rotating rods.

[0007] Optionally, the two grinding belts have different grit counts, used for rough grinding and fine polishing respectively.

[0008] Optionally, each support frame is slidably connected to a mounting base, and each mounting base is equipped with a second motor, the output shaft of which is connected to an adjacent rotating rod.

[0009] Optionally, each support frame is fixedly connected to a mounting plate, each mounting plate is rotatably connected to a first screw, each first screw is threadedly connected to a clip, and each clip engages with a slot opened on the adjacent guide frame.

[0010] Optionally, each guide rail has a toothed groove surface in its slot, and each bracket has a protruding tooth on its end face that engages with the groove surface.

[0011] Optionally, each support frame has a sliding support arc plate for supporting the rotating rod, and the bottom wall of the support frame is threaded with a second screw, the top of the second screw being rotatably connected to the support arc plate.

[0012] Optionally, symmetrically distributed arc-shaped telescopic rods are fixed to the inner wall of the rotating frame. A spring connects the telescopic part of the arc-shaped telescopic rod to the fixed part, and the telescopic part of the arc-shaped telescopic rod is fixed to the adjacent guide frame.

[0013] Optionally, the belt drive mechanism includes a pulley fixed to the output shaft of the first motor and a flat belt wound between the pulley and the frame.

[0014] Compared with existing technologies, this invention has the following advantages: Addressing the pain points of existing equipment requiring manual measurement, experience-based simulation, and repeated adjustments when changing pipe diameters, the equipment achieves rapid alignment of metal pipes through an arc-shaped positioning groove. The adaptive mechanism composed of a figure-eight guide and a torsion spring allows for initial fitting of different pipe diameters without manual adjustment. The second screw adjusts the height of the support arc plate to achieve precise pressure control. Combined with the locking structure of the first screw and the clamp, parameter settings can be completed without relying on experience, significantly shortening debugging time, lowering the operational threshold, adapting to rapid switching of multiple pipe diameter specifications, and improving the equipment's production adaptability.

[0015] To address the issues of path deviation and uneven grinding pressure caused by manual adjustments, the equipment employs a combined "revolution + rotation" grinding action to achieve seamless processing of the outer circumference of the pipe. The triangular grinding band envelops the area, increasing the contact area. The buffer mechanism, consisting of an arc-shaped telescopic rod and a spring, can adapt to pipe diameter fluctuations in real time, maintaining constant grinding pressure and preventing local over- or under-polishing. The low-pressure setting and elastic tracking during the fine polishing stage effectively prevent pipe deformation caused by friction overheating, ensuring the surface roughness of the finished product and improving the stability of processing quality. Attached Figure Description

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

[0017] Figure 2 This is a three-dimensional structural cross-sectional view of the first motor, grinding mounting cylinder, and mounting bracket of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the support frame, guide frame, and torsion spring of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, such as the torsion spring, rotating rod, and grinding belt.

[0020] Figure 5 This is a three-dimensional structural cross-sectional view of the rotating rod, mounting base, and second motor of the present invention.

[0021] Figure 6 This is a three-dimensional structural cross-sectional view of the mounting plate, card holder, and first screw of the present invention.

[0022] Figure 7 This is a three-dimensional structural cross-sectional view of the guide frame of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the components of the present invention, including the rotating rod, the supporting arc plate, and the second screw.

[0024] Figure 9 This is a three-dimensional structural diagram of the supporting arc plate and the second screw of the present invention.

[0025] Figure 10This is a three-dimensional structural diagram of the rotating frame, support frame, guide frame, and arc-shaped telescopic rod of the present invention.

[0026] In the diagram: 1. Base, 101. Metal tube, 2. Grinding mounting cylinder, 3. Mounting bracket, 4. Rotating frame, 5. First motor, 6. Flat belt, 601. Pulley, 7. Support frame, 8. Guide frame, 801. Guide column, 9. Torsion spring, 10. Rotating rod, 11. Grinding belt, 12. Mounting seat, 13. Second motor, 14. Mounting plate, 15. Clip, 151. Slot surface, 16. First screw, 17. Support arc plate, 18. Second screw, 19. Arc-shaped telescopic rod, 191. Spring. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings.

[0028] Example 1: A grinding and polishing integrated machine for processing metal tube 101, such as Figures 1-3 As shown, the system includes a base 1 as the main support, a grinding mounting cylinder 2 in the center of the base 1's surface, which provides mounting support and protective space for the grinding components to ensure operational safety; a mounting frame 3 symmetrically distributed along the grinding mounting cylinder 2 is fixed to the base 1, and an arc-shaped positioning groove is provided on its top to stably support and quickly center the metal tube 101 to be processed, ensuring that the position of the pipe is fixed during processing and preventing displacement; a rotating frame 4 is rotatably connected to the inner side of the grinding mounting cylinder 2, which drives the grinding components to rotate synchronously, realizing all-round, no-dead-angle grinding of the outer circumference of the metal tube 101; a first motor 5 is installed inside the base 1 as the power source for the rotation of the rotating frame 4, and its output shaft is fixed to a pulley 601 through a coupling. A flat belt 6 is wound between the pulley 601 and the rotating frame 4 to smoothly transmit the power of the first motor 5 to the rotating frame 4, realizing the stable rotation of the rotating frame 4.

[0029] Symmetrically distributed support frames 7 are fixedly connected to the inner side of the rotating frame 4. Each support frame 7 is rotatably connected to symmetrically distributed guide frames 8 via a rotating shaft. They are arranged in a figure-eight shape to form an adaptive tensioning mechanism, which is used to optimize the force distribution of the grinding part and improve the grinding stability. Symmetrically distributed torsion springs 9 are connected between each guide frame 8 and the adjacent support frame 7. They are wound around the adjacent guide frame 8 to provide elastic restoring force, so that the grinding part has an adaptive clamping function and always keeps it in close contact with the surface of the metal tube 101. Each guide frame 8 is rotatably connected to a guide post 801 at the end away from the support frame 7. Each support frame 7 is rotatably connected to a rotating rod 10 via a bearing. A grinding strip 11 is wound between two adjacent guide posts 801 and rotating rods 10. They are arranged in a triangle. This triangular layout makes the grinding strip 11 form a wrap-around contact with the metal tube 101, increasing the effective contact area.

[0030] When in use, place the metal tube 101 on the mounting bracket 3. The triangular arrangement ensures that the bottom edge of the polishing belt 11 is in close contact with the metal tube 101, achieving continuous and efficient polishing.

[0031] The two grinding belts 11 have different "grit counts" and correspond to the two processes of rough grinding and fine polishing respectively: the grinding belt 11 on the left should be a coarse grinding belt 11 with a grit count of 80-120, which is used for preliminary rust removal and rough grinding; the grinding belt 11 on the right should be a fine grinding belt 11 with a grit count of 320-400 or a polishing belt, which is used to achieve fine polishing and mirror finish.

[0032] like Figure 4 and Figure 5 As shown, specifically, each support frame 7 is slidably connected to a mounting base 12 via a sliding groove. Each mounting base 12 is equipped with a second motor 13, the output shaft of which is connected to the adjacent rotating rod 10 via a coupling, forming an independent grinding belt 11 drive unit. When the second motor 13 starts and controls the rotating rod 10 to rotate, the grinding belt 11 rotates at high speed through the tension and transmission cooperation between the grinding belt 11 and the guide column 801. This ensures that all the grinding discs of the grinding belt 11 can make full and uniform contact with the outer wall of the metal tube 101 for grinding, effectively improving grinding efficiency and uniformity.

[0033] like Figure 6 and Figure 7 As shown, specifically, each of the support frames 7 has a mounting plate 14 fixed to one of its opposite sides, serving as the mounting base for the locking mechanism; each mounting plate 14 is rotatably connected to a first screw 16, and each first screw 16 is threadedly connected to a clip 15, forming a screw-nut transmission pair; each clip 15 passes through the adjacent mounting plate 14 and engages with the slot of the guide frame 8 to achieve mechanical locking of the swing angle of the guide frame 8.

[0034] Each guide rail 8 has a slot with a toothed groove surface 151 in its slot, and each bracket 15 has a protruding tooth on its end face that matches the tooth pattern of the groove surface 151. Through the meshing of the protruding tooth and the groove surface 151, the bracket 15 can be effectively prevented from loosening under vibration, thereby achieving precise and reliable locking of the swing angle of the guide rail 8.

[0035] like Figure 8 and Figure 9As shown, specifically, each support frame 7 has a support arc plate 17 vertically slidably connected to it via a guide rail to support the rotating rod 10; each rotating rod 10 contacts the inner arc surface of the support arc plate 17, which matches the outer circle of the rotating rod 10 to ensure support stability; each support frame 7 has a second screw 18 threadedly connected to its bottom wall, and the top of the second screw 18 is rotatably connected to the bottom of the adjacent support arc plate 17 via a thrust bearing. By turning the second screw 18, the height of the support arc plate 17 can be finely adjusted, thereby achieving precise adjustment of the position of the rotating rod 10 and ensuring the tension of the grinding belt 11.

[0036] Working principle: Grinding and polishing of standard diameter metal pipe 101 This embodiment is applicable to the batch grinding and polishing of conventional metal pipes 101 such as stainless steel pipes and carbon steel pipes with uniform diameter and no obvious bends. The specific process is as follows: Before operation, the metal tube 101 to be processed is fed into the equipment from the left end and placed in the arc-shaped positioning groove of the left mounting bracket 3. The centering function of the arc-shaped groove is used to achieve precise alignment between the axis of the metal tube 101 and the center of the equipment, so as to prevent the tube from shifting during processing.

[0037] Manually move the symmetrically distributed guide frame 8 on the left side, causing it to rotate outward around the pivot axis connected to the support frame 7. The included angle of the guide frame 8 increases, driving the end guide post 801 and the surrounding coarse-grit grinding belt 11 (80-120 grit) to move upward as a whole. At this time, the torsion spring 9 between the guide frame 8 and the support frame 7 undergoes elastic deformation. Push the metal tube 101 to the right, moving the section to be processed directly below the triangular envelope area formed by the coarse-grit grinding belt 11. Release the guide frame 8, and under the restoring force of the torsion spring 9, the guide frame 8 rotates inward, and the bottom edge of the grinding belt 11 tightly adheres to the outer wall of the metal tube 101.

[0038] Tighten the second screw 18 on the bottom wall of the left support frame 7 to push the support arc plate 17 to move vertically along the guide rail via the thrust bearing. To reduce the grinding pressure, tighten the second screw 18 to move the support arc plate 17 and rotating rod 10 upwards, lifting the grinding belt 11 and forcing the guide frame 8 to retract. To increase the pressure, tighten the second screw 18 to move the rotating rod 10 downwards, causing the guide frame 8 to expand outwards under the action of the torsion spring 9, increasing the envelope angle of the grinding belt 11. After the pressure is adjusted, tighten the first screw 16 on the mounting plate 14 to drive the clamp 15 into the slot of the guide frame 8 via the lead screw nut transmission until the protruding teeth of the clamp 15 are fully engaged with the groove surface 151, thereby locking the angle of the guide frame 8 and ensuring constant grinding pressure.

[0039] The first motor 5 and the second motor 13 are started. The first motor 5 drives the rotating frame 4 to rotate through the pulley 601 and the flat belt 6, which drives the entire grinding mechanism to revolve around the metal tube 101, so as to achieve grinding without dead angles on the outer periphery of the tube. The second motor 13 drives the rotating rod 10 to rotate at high speed, and through the transmission of the guide column 801, the grinding belt 11 rotates itself, forming a composite grinding action of "revolution + rotation", which efficiently removes oxide scale and burrs from the surface of the tube.

[0040] Push the metal tube 101 to the right at a uniform speed of 50-100 mm / min. When the tube processing section enters the working area of ​​the fine-grit grinding belt 11 (320-400 grit) on the right, repeat the pressure adjustment and locking operations described above to achieve fine polishing of the tube surface using the fine-grit grinding belt 11. After the metal tube 101 has been completely sent out from the right end of the equipment, turn off the first motor 5 and the second motor 13 to complete a single operation.

[0041] Example 2: Figure 1 and Figure 10 As shown, specifically, symmetrically distributed arc-shaped telescopic rods 19 are fixed to the inner wall of the rotating frame 4. Springs 191 are connected between the telescopic part and the fixed part of each rod, forming an elastic buffer mechanism. The telescopic part of each arc-shaped telescopic rod 19 is fixed to the adjacent guide frame 8. This mechanism enables the guide frame 8 and the grinding belt 11 on it to generate adaptive elastic displacement when encountering sudden changes in pipe diameter or slight bending, maintaining constant grinding pressure and avoiding overload or damage to the workpiece.

[0042] Polishing of metal tube 101 with slight diameter fluctuations This embodiment is applicable to metal pipes 101 with diameter fluctuations of ±0.5-1mm or slight bends. It focuses on utilizing the equipment's elastic buffer mechanism to adapt to changes in pipe diameter. The specific process is as follows: The tube installation process is the same as in Example 1. After the coarse grinding belt adheres to the tube body, the guide frame 8 is not locked immediately. Instead, the initial clamping force provided by the torsion spring 9 and the elasticity of the arc-shaped telescopic rod 19 mechanism are used to adapt to changes in tube shape. When encountering a section with a larger tube diameter, the tube body pushes the grinding belt 11 outward, forcing the guide frame 8 to expand outward, the telescopic part of the arc-shaped telescopic rod 19 retracts, and the spring 191 is compressed, playing a buffering role. When the tube diameter is smaller, the spring 191 releases energy, pushing the guide frame 8 inward, maintaining a basically constant contact pressure between the grinding belt 11 and the tube body.

[0043] Based on this, a reference pressure (e.g., 0.3-0.5 MPa for rough grinding) can be preset via the second screw 18. During processing, the elastic buffer system can automatically compensate for pressure fluctuations within ±10%, eliminating the need for frequent manual adjustments. For the fine polishing process, the reference pressure can be appropriately reduced (e.g., 0.1-0.2 MPa). Relying on the following property of the elastic mechanism, it ensures that the fine grinding belt 11 effectively contacts the raised parts without over-grinding the recessed areas, thereby achieving a uniform surface roughness (Ra≤0.8μm) along the entire tube length. After processing, the material is discharged from the right end and the machine is stopped.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A grinding and polishing integrated machine for metal pipe processing, characterized in that, The base (1) includes a base (1) with a grinding mounting cylinder (2) in the center of the table surface; mounting brackets (3) symmetrically distributed along the grinding mounting cylinder (2) are fixedly connected to the base (1), and the top of the brackets has an arc-shaped positioning groove for positioning the metal tube (101); a rotating frame (4) is rotatably connected to the inner side of the grinding mounting cylinder (2); a first motor (5) is installed inside the base (1), and the output shaft of the first motor (5) is connected to the rotating frame (4) through a belt drive mechanism; symmetrically distributed supports are fixedly connected to the inner side of the rotating frame (4). Each support frame (7) is rotatably connected to a symmetrically distributed guide frame (8) arranged in a figure-eight shape; each guide frame (8) is connected to a torsion spring (9) for providing a restoring force between it and the adjacent support frame (7); each guide frame (8) is rotatably connected to a guide post (801) at its end; each support frame (7) is rotatably connected to a rotating rod (10); and a grinding belt (11) for processing the metal tube (101) is wound between two adjacent guide posts (801) and rotating rods (10).

2. A grinding and polishing integrated machine for metal pipe processing according to claim 1, characterized in that, The two grinding belts (11) have different mesh counts and are used for rough grinding and fine polishing, respectively.

3. A grinding and polishing integrated machine for metal pipe processing according to claim 2, characterized in that, Each support frame (7) has a sliding mounting base (12) inside, and each mounting base (12) is equipped with a second motor (13). The output shaft of the second motor (13) is connected to the adjacent rotating rod (10).

4. A grinding and polishing integrated machine for metal pipe processing according to claim 3, characterized in that, Each support frame (7) is fixed with a mounting plate (14), each mounting plate (14) is rotatably connected with a first screw (16), each first screw (16) is threadedly connected with a clip (15), and each clip (15) engages with a slot opened on the adjacent guide frame (8).

5. A grinding and polishing integrated machine for metal pipe processing according to claim 4, characterized in that, Each guide frame (8) has a toothed groove surface (151) in its slot, and each card holder (15) has a protruding tooth on its end face that meshes with the groove surface (151).

6. A grinding and polishing integrated machine for metal pipe processing according to claim 5, characterized in that, Each support frame (7) has a sliding connection to a support arc plate (17) for supporting the rotating rod (10). The bottom wall of the support frame (7) is threaded with a second screw (18), and the top of the second screw (18) is rotatably connected to the support arc plate (17).

7. A grinding and polishing integrated machine for metal pipe processing according to claim 6, characterized in that, The inner wall of the rotating frame (4) is fixed with symmetrically distributed arc-shaped telescopic rods (19). A spring (191) connects the telescopic part and the fixed part of the arc-shaped telescopic rod (19). The telescopic part of the arc-shaped telescopic rod (19) is fixed to the adjacent guide frame (8).

8. A grinding and polishing integrated machine for metal pipe processing according to claim 7, characterized in that, The belt drive mechanism includes a pulley (601) fixed to the output shaft of the first motor (5) and a flat belt (6) wound between the pulley (601) and the frame (4).

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