Active force control radial floating polishing device
By detecting offset through guide bars and spring assemblies and controlling the adjustment of the robotic arm using pressure sensors, radial floating of the grinding tool is achieved, solving the fitting problem when grinding complex curved surfaces and improving grinding accuracy and efficiency.
Patent Information
- Application Number
- CN202520051874.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-09
AI Technical Summary
Existing grinding tools cannot float radially when machining complex curved surfaces, resulting in the grinding tool not being able to fully adhere to the workpiece surface, causing scratches or damage, and affecting grinding accuracy and efficiency.
An active force-controlled radial floating grinding device was designed. The device detects the offset through guide bars and spring assemblies, and uses a pressure sensor to control the robotic arm to make radial adjustments, ensuring that the grinding tool is in complete contact with the workpiece surface.
It improves grinding precision, avoids damage to the workpiece surface by grinding tools, and increases processing efficiency.
Smart Images
Figure CN223834264U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of active force-controlled radial floating grinding device, specifically an active force-controlled radial floating grinding device. Background Technology
[0002] In the machining process, in order to make the workpiece more aesthetically pleasing and to ensure the workpiece accuracy, the workpiece surface needs to be ground. As the shape of the workpiece becomes more and more complex, the grinding method is also different. When grinding the complex workpiece surface, more and more problems will be encountered, and the processing efficiency and processing accuracy cannot be guaranteed. Therefore, the grinding tool needs to be able to accurately fit the workpiece surface.
[0003] Currently, machine tools or grinding machines are mainly used for grinding workpieces. Both rely on the ability of the grinding tool to float axially during grinding, and apply a certain force during axial floating to ensure the contact between the grinding tool and the workpiece surface. However, when grinding complex curved surfaces, the grinding tool cannot float radially, resulting in incomplete contact between the grinding tool and the grinding surface. This can easily cause scratches on the workpiece by the edge of the grinding tool or damage to the grinding tool, affecting grinding accuracy and processing efficiency. Therefore, an active force-controlled radial floating grinding device is proposed to address the above problems. Utility Model Content
[0004] To overcome the shortcomings of existing technologies and address the problems existing in existing technologies, this utility model proposes an active force-controlled radial floating grinding device.
[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The active force-controlled radial floating grinding device of this utility model includes a fixed shell; a drive shaft is driven to the upper part of the fixed shell, a transmission assembly is driven to the end of the drive shaft located inside the fixed shell, a grinding shaft is driven to the bottom of the fixed shell, the end of the grinding shaft located inside the fixed shell is driven to the lower part of the transmission assembly, and a floating assembly is provided on the outer side of the end of the grinding shaft located inside the fixed shell.
[0006] The floating component includes a hollow shaft, and the grinding shaft is rotatably disposed inside the hollow shaft. Eight guide bars are arranged in a grid pattern on the outside of the hollow shaft, and two groups of four guide bars are arranged symmetrically on the top and bottom. The inner side of each guide bar is slidably connected to the hollow shaft through a guide block. A sliding shaft is fixedly connected between two adjacent ends of the two groups of guide bars that are located on the same horizontal plane. An arc-shaped shell is slidably disposed on the outside of each sliding shaft, and the arc-shaped shell is horizontally fixed to the side wall of the fixed outer shell. Springs are disposed at both ends of the sliding shaft inside the arc-shaped shell.
[0007] The fixed outer shell has a through groove on its side wall that communicates with the end of the arc-shaped shell, and a pressure sensor is fixedly connected in each through groove.
[0008] Preferably, the actuating end of the spring is aligned with the detection end of the pressure sensor, a sealing assembly for closing is installed at the bottom opening of the fixed housing, and a mounting assembly for connecting to a robotic arm or machine tool is installed at the top of the fixed housing.
[0009] Preferably, the transmission assembly includes a connecting shaft and a connecting column. A first spherical spline head is fixedly connected to the connecting column. A first spline ball shell is provided on the first spherical spline head and slidably fitted therewith. The drive shaft is fixedly connected to the first spline ball shell. A second spline ball shell is fixedly connected to the bottom end of the connecting shaft. A second spherical spline head is provided inside the second spline ball shell and slidably fitted therewith. The grinding shaft is fixedly connected below the second spherical spline head.
[0010] Preferably, the connecting shaft has a spline groove, the connecting post has a spline shaft fixedly connected to it, and the spline shaft is slidably inserted into the spline groove.
[0011] Preferably, the enclosed assembly includes two sliding plates and four fitting plates. The two sliding plates are fixed to the hollow shaft and are parallel to each other. The four fitting plates are symmetrically fixed to the inner wall of the fixed housing in pairs, and the two sets of fitting plates are perpendicular to each other. The perpendicular sides of the two sliding plates are respectively slidably fitted into the two sets of fitting plates.
[0012] Preferably, the mounting assembly includes a bushing fixed to the fixed housing and located outside the drive shaft. A mounting plate is fixed to the bushing, and screws are evenly distributed and fixed to the mounting plate.
[0013] Preferably, a grinding tool for grinding is fixedly connected to the bottom end of the grinding shaft, and the center line of the drive shaft coincides with that of the grinding shaft.
[0014] The advantages of this utility model are:
[0015] This invention addresses the issue of a hollow shaft moving in the offset direction when the grinding tool deviates. A guide bar perpendicular to the offset direction moves a sliding shaft at its end in the same direction. As the sliding shaft slides, it compresses a spring in the same direction as the offset. A pressure sensor detects the force exerted on the spring when the grinding shaft deviates, and the resulting data is used to control a robotic arm to move in the same direction as the grinding shaft's offset. This process corrects the radial offset of the grinding shaft and prevents the grinding tool from damaging the workpiece surface. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the first three-dimensional structure in this embodiment;
[0018] Figure 2 This is an enlarged cross-sectional view of the fixed outer shell main structure in this embodiment;
[0019] Figure 3 This is an enlarged schematic diagram of the main structure of the transmission component in this embodiment;
[0020] Figure 4 This is an enlarged schematic diagram of the main structure of the floating component in this embodiment;
[0021] Figure 5 This is an enlarged schematic diagram of the main installation structure of the hollow shaft and guide bar in this embodiment;
[0022] Figure 6 This is an enlarged schematic diagram of the main structure of the enclosed component in this embodiment.
[0023] In the diagram: 1. Fixed outer casing;
[0024] 2. Mounting components; 21. Bushing; 22. Mounting plate; 23. Screw;
[0025] 3. Drive shaft;
[0026] 4. Grind the shaft;
[0027] 5. Enclosed component; 51. Sliding plate; 52. Cladding plate;
[0028] 6. Polishing tools;
[0029] 7. Floating component; 71. Hollow shaft; 72. Guide block; 73. Guide bar; 74. Sliding shaft; 75. Arc-shaped shell; 76. Spring; 77. Pressure sensor;
[0030] 8. Transmission assembly; 81. Connecting shaft; 82. Spline groove; 83. Connecting column; 84. Spline shaft; 85. No. 1 spherical spline head; 86. No. 1 spline ball housing; 87. No. 2 spline ball housing; 88. No. 2 spherical spline head. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0032] Please see Figure 1-6 As shown, an active force-controlled radial floating grinding device includes a fixed housing 1; a drive shaft 3 is driven to the upper part of the fixed housing 1, a transmission assembly 8 is driven to the end of the drive shaft 3 located inside the fixed housing 1, a grinding shaft 4 is driven to the bottom of the fixed housing 1, the end of the grinding shaft 4 located inside the fixed housing 1 is driven to the lower part of the transmission assembly 8, and a floating assembly 7 is provided on the outer side of the end of the grinding shaft 4 located inside the fixed housing 1.
[0033] The floating component 7 includes a hollow shaft 71, and the grinding shaft 4 is rotatably disposed inside the hollow shaft 71. Eight guide bars 73 are arranged in a grid pattern on the outside of the hollow shaft 71, and two groups of four guide bars 73 are arranged symmetrically on the top and bottom. The inner side of each guide bar 73 is slidably connected to the hollow shaft 71 through a guide block 72. A sliding shaft 74 is fixedly connected between two adjacent ends of the two groups of guide bars 73 that are located on the same horizontal plane. An arc-shaped shell 75 is slidably disposed on the outside of each sliding shaft 74, and the arc-shaped shell 75 is horizontally fixed to the side wall of the fixed outer shell 1. Springs 76 are disposed at both ends of the sliding shaft 74 inside the arc-shaped shell 75.
[0034] The fixed outer casing 1 has a through groove on its side wall that communicates with the end of the arc-shaped casing 75, and a pressure sensor 77 is fixedly connected in each through groove.
[0035] The actuating end of the spring 76 is directly opposite the detection end of the pressure sensor 77. A sealing component 5 for sealing is installed at the bottom opening of the fixed housing 1, and a mounting component 2 for connecting with a robotic arm or machine tool is installed at the top of the fixed housing 1.
[0036] The transmission assembly 8 includes a connecting shaft 81 and a connecting column 83. A first spherical spline head 85 is fixedly connected to the connecting column 83. A first spline ball shell 86 is provided on the first spherical spline head 85 and slidably fitted therewith. The drive shaft 3 is fixedly connected to the first spline ball shell 86. A second spline ball shell 87 is fixedly connected to the bottom end of the connecting shaft 81. A second spherical spline head 88 is provided inside the second spline ball shell 87 and slidably fitted therewith. The grinding shaft 4 is fixedly connected below the second spherical spline head 88.
[0037] The connecting shaft 81 has a spline groove 82, and the connecting post 83 has a spline shaft 84 fixedly connected to it, and the spline shaft 84 is slidably inserted into the spline groove 82.
[0038] The enclosed assembly 5 includes two sliding plates 51 and four fitting plates 52. The two sliding plates 51 are fixed to the hollow shaft 71 and are parallel to each other. The four fitting plates 52 are symmetrically fixed to the inner wall of the fixed outer shell 1 in pairs. The two sets of fitting plates 52 are perpendicular to each other. The perpendicular sides of the two sliding plates 51 are respectively slidably fitted into the two sets of fitting plates 52.
[0039] The mounting assembly 2 includes a bushing 21, which is fixed to the fixed housing 1 and located outside the drive shaft 3. A mounting plate 22 is fixed to the bushing 21, and screws 23 are evenly distributed and fixed to the mounting plate 22.
[0040] A grinding tool 6 for grinding is fixedly connected to the bottom end of the grinding shaft 4, and the center line of the drive shaft 3 coincides with that of the grinding shaft 4.
[0041] Currently, when grinding workpieces, machine tools or grinding machines are mainly used. Both rely on the grinding tool floating axially during grinding, applying a certain force to ensure the grinding tool adheres to the workpiece surface. However, when grinding complex curved surfaces, the grinding tool cannot float radially, resulting in incomplete contact between the grinding tool and the grinding surface. This can easily cause scratches on the workpiece or damage to the grinding tool, affecting grinding accuracy and processing efficiency. In this solution, in the initial state, the springs 76 at both ends of the sliding shaft 74 will always push the sliding shaft 74 inward, keeping the sliding shaft 74 in the middle position of the arc-shaped shell 75. The reaction force of the springs 76 will be transmitted to the detection end of the pressure sensor 77. During use, the device is installed on the drive end of the robotic arm or machine tool using the mounting assembly 2. When the drive shaft 3 rotates, it drives the grinding shaft 4 to rotate through the transmission assembly 8, thereby achieving the effect of the grinding shaft 4 driving the grinding tool 6 to rotate, so that the grinding tool 6 can be used for grinding operations.
[0042] When grinding complex workpiece surfaces, the grinding tool 6 may shift when it comes into contact with the workpiece surface. When the grinding tool 6 shifts, it will drive the hollow shaft 71 to move in the offset direction and slide between the guide bars 73 in the same offset direction. The guide bars 73, which are perpendicular to the offset direction, will drive the sliding shaft 74 at its end to move in the offset direction and slide in the arc-shaped shell 75 in the offset direction. At this time, when the sliding shaft 74 slides, it will squeeze the spring 76 on the same side as the offset direction. When the spring 76 is squeezed, the pressure sensor 77 will receive the squeeze signal. Then, the pressure sensor 77 will detect the magnitude of the squeezing force on the spring 76 when the grinding shaft 4 shifts. The control terminal will process the data obtained by the pressure sensor 77 on the squeezed side and control the robotic arm to move in the same direction as the grinding shaft 4 shifts, thereby repairing the radial offset of the grinding shaft 4 and preventing the grinding tool 6 from damaging the workpiece surface.
[0043] Furthermore, when the grinding shaft 4 shifts, it will drive the second spherical spline head 88. When the second spherical spline head 88 moves, it will drive the second spline ball shell 87 to rotate around the first spherical spline head 85. When the second spline ball shell 87 moves, it will drive the spline shaft 84 to slide and extend within the spline groove 82. When the second spline ball shell 87 shifts, the connecting shaft 81 and the connecting post 83 will swing accordingly, and drive the first spherical spline head 85 to slide and twist within the first spline ball shell 86, so as to ensure the driving effect of the drive shaft 3 on the grinding shaft 4.
[0044] When the hollow shaft 71 moves, it will cause the sliding plate 51 below it to slide and extend within the mating plate 52, thus preventing dust and debris generated during the polishing process from entering the fixed housing 1.
[0045] The combination achieves radial floating control, resulting in higher grinding precision compared to traditional floating grinding devices. It also effectively avoids damage to the workpiece caused by the grinding tool's inability to float radially, thus improving the grinding effect.
[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. An active force-controlled radial floating grinding device, characterized in that: It includes a fixed housing (1); the upper part of the fixed housing (1) is connected to a drive shaft (3), the end of the drive shaft (3) located inside the fixed housing (1) is connected to a transmission assembly (8), the bottom of the fixed housing (1) is connected to a grinding shaft (4), the end of the grinding shaft (4) located inside the fixed housing (1) is connected to the transmission assembly (8), and a floating assembly (7) is provided on the outer side of the end of the grinding shaft (4) located inside the fixed housing (1); The floating component (7) includes a hollow shaft (71), and the grinding shaft (4) is rotatably disposed inside the hollow shaft (71). Eight guide bars (73) are arranged in a grid pattern on the outside of the hollow shaft (71), and the eight guide bars (73) are arranged in two groups of four, symmetrically arranged vertically. The inner side of each guide bar (73) is slidably connected to the hollow shaft (71) through a guide block (72). A sliding shaft (74) is fixedly connected between the two adjacent ends of the two groups of guide bars (73) located on the same horizontal plane. An arc-shaped shell (75) is slidably disposed on the outside of each sliding shaft (74), and the arc-shaped shell (75) is horizontally fixed to the side wall of the fixed outer shell (1). Springs (76) are disposed at both ends of the sliding shaft (74) inside the arc-shaped shell (75). The fixed outer shell (1) has a through groove on its side wall that communicates with the end of the arc-shaped shell (75), and a pressure sensor (77) is fixedly connected in the through groove.
2. The active force-controlled radial floating grinding device according to claim 1, characterized in that: The working end of the spring (76) is directly opposite the detection end of the pressure sensor (77). A sealing component (5) for sealing is installed at the bottom opening of the fixed housing (1). A mounting component (2) for connecting with a robotic arm or machine tool is installed at the top of the fixed housing (1).
3. The active force-controlled radial floating grinding device according to claim 1, characterized in that: The transmission assembly (8) includes a connecting shaft (81) and a connecting column (83). A first spherical spline head (85) is fixedly connected to the connecting column (83). A first spline ball shell (86) is provided on the first spherical spline head (85) and slides with it. The drive shaft (3) is fixedly connected to the first spline ball shell (86). A second spline ball shell (87) is fixedly connected to the bottom end of the connecting shaft (81). A second spherical spline head (88) is provided inside the second spline ball shell (87) and slides with it. The grinding shaft (4) is fixedly connected below the second spherical spline head (88).
4. The active force-controlled radial floating grinding device according to claim 3, characterized in that: A spline groove (82) is provided on the connecting shaft (81), and a spline shaft (84) is fixedly connected to the bottom of the connecting column (83), and the spline shaft (84) is slidably inserted into the spline groove (82).
5. The active force-controlled radial floating grinding device according to claim 2, characterized in that: The enclosed assembly (5) includes two sliding plates (51) and four fitting plates (52). The two sliding plates (51) are fixed to the hollow shaft (71) and are parallel to each other. The four fitting plates (52) are symmetrically fixed to the inner wall of the fixed outer shell (1) in pairs, and the two sets of fitting plates (52) are perpendicular to each other. The perpendicular sides of the two sliding plates (51) are respectively slidably fitted into the two sets of fitting plates (52).
6. The active force-controlled radial floating grinding device according to claim 2, characterized in that: The mounting assembly (2) includes a bushing (21) which is fixed to the fixed housing (1) and located outside the drive shaft (3). A mounting plate (22) is fixed to the bushing (21), and screws (23) are evenly distributed and fixed to the mounting plate (22).
7. The active force-controlled radial floating grinding device according to claim 1, characterized in that: The grinding shaft (4) has a grinding tool (6) fixedly connected to its bottom end, and the drive shaft (3) coincides with the center line of the grinding shaft (4).