A grinding positioning fixture for large workpieces
By designing a grinding positioning fixture with a detachable chuck and spring connection, the problem of poor adaptability of existing fixtures is solved, and stable positioning and efficient machining of workpieces are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MAANSHAN YASHIDA INTELLIGENT TECH CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-29
AI Technical Summary
Existing fixtures cannot adapt to the processing requirements of various workpieces, resulting in poor production flexibility and an inability to ensure stable positioning of workpieces during grinding, which affects processing accuracy and surface quality.
A positioning fixture for grinding large workpieces was designed. The detachable chuck device and spring connection structure allow for the free selection of different chuck specifications according to the workpiece shape and task. Combined with dovetail groove snap-fit and limit plate restraint, a stable connection is ensured.
It enables flexible selection of chucks according to workpiece requirements, avoiding multiple clamping and machining step adjustments, improving production efficiency and machining accuracy, and reducing workpiece displacement and vibration.
Smart Images
Figure CN224295585U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fixture technology, and in particular to a positioning fixture for grinding large workpieces. Background Technology
[0002] A fixture is a device used in mechanical manufacturing, processing, and assembly processes to clamp workpieces (or guide cutting tools). It enables the workpiece to obtain the correct position relative to the machine tool or cutting tool and maintain this position during processing, thereby ensuring processing accuracy, improving production efficiency, and reducing labor intensity. Among them, the positioning fixture for grinding of large workpieces is used in the grinding process to determine the correct position of large and heavy workpieces on the machine tool and ensure that their position remains stable during processing, so as to ensure the accuracy and quality of grinding.
[0003] Because the existing fixtures are equipped with a single and fixed type of chuck, it is difficult for a single machine to adapt to the processing requirements of a variety of workpieces, thus greatly reducing production flexibility. At the same time, this single fixed chuck cannot ensure stable and accurate clamping and positioning of all workpieces. During the processing, the workpiece is very prone to displacement or deformation, which will have an adverse effect on processing accuracy and surface quality. Utility Model Content
[0004] The technical problem to be solved by this utility model is that the existing technology has the disadvantage that users cannot freely select different specifications of chuck devices according to the shape of the workpiece and the task. To this end, we propose a positioning fixture for grinding of large workpieces.
[0005] To achieve the above objectives, this application adopts the following technical solution: a positioning fixture for grinding large workpieces. It includes an operating table, with two movable supports slidably connected to both ends of the operating table. The top of each movable support has a mounting groove, and a mounting block is installed inside the mounting groove. A chuck is fixedly connected to one end of each mounting block. Circular grooves are formed on both sides of each mounting block, and a first spring is fixedly connected inside each groove. A connecting block is fixedly connected to the other end of each first spring. Circular through holes are formed on both sides of each movable support. The surface of the connecting block is slidably connected to the inside of the circular through hole, and a push rod is slidably connected inside the circular through hole.
[0006] Preferably, dovetail grooves are provided on both sides of the mounting block, and dovetail blocks are fixedly connected to both sides of the mounting grooves, with the surface of the dovetail blocks engaging with the interior of the dovetail grooves.
[0007] Preferably, a limiting plate is fixedly connected to the surface of the connecting block, and the surface of the limiting plate is slidably connected to the inside of the circular groove.
[0008] Preferably, the top and bottom of the push rod surface are provided with sliding grooves, and the top and bottom of the circular perforation side are fixedly connected with sliding blocks, and the surface of the sliding blocks is slidably connected to the inside of the sliding grooves.
[0009] Preferably, a second spring is slidably connected to the surface of the push rod, one end of the second spring is fixedly connected to one side of the push rod, and the other end of the second spring is fixedly connected to one side of the inside of the circular through hole.
[0010] Preferably, the movable bracket has a through groove inside, a support frame is slidably connected inside the through groove, a square plate is fixedly connected to one end of the movable bracket, a threaded support rod is threadedly connected inside the square plate, the top of the threaded support rod is rotatably connected to the inside of the support frame, and a support plate is fixedly connected to the top of one end of the support frame.
[0011] Preferably, a rubber pad is installed at the top of the support plate.
[0012] The technical effects and advantages of this utility model are as follows:
[0013] In this invention, pressing the push rod pushes the connecting block, moving it out of the circular perforation. This disconnects the moving bracket from the mounting block, allowing the mounting block and the chuck connected to it to be removed from the device. The appropriate chuck is then installed according to the workpiece's requirements. During reinstallation, pressing the connecting block pushes it into the circular groove, then placing the mounting block inside the groove. Releasing the press on the connecting block allows the first spring to push it into the circular perforation, repositioning the mounting block and connecting it to the moving bracket. This design allows users to freely select different chuck specifications based on the workpiece's shape and processing task, avoiding adjustments to processing steps or multiple clamping attempts due to mismatched chucks, thus simplifying the processing flow and improving production efficiency. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the main structure of the clamp of this utility model;
[0015] Figure 2 This is a schematic diagram of the mounting groove structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the circular groove structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the internal disassembled structure of the circular perforation of this utility model;
[0018] Figure 5 This is a schematic diagram of the support frame structure of this utility model.
[0019] Legend: 1. Operating table; 2. Movable bracket; 3. Mounting slot; 4. Mounting block; 5. Clamping device; 6. Circular groove; 7. First spring; 8. Connecting block; 9. Circular through hole; 10. Push rod; 11. Dovetail groove; 12. Dovetail block; 13. Limiting plate; 14. Sliding groove; 15. Sliding block; 16. Second spring; 17. Through groove; 18. Support frame; 19. Square plate; 20. Threaded strut; 21. Support plate; 22. Rubber pad. Detailed Implementation
[0020] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0021] Reference Figures 1-4 As shown, this utility model provides a technical solution: a positioning fixture for grinding large workpieces, including an operating table 1. Two movable supports 2 are slidably connected to both ends of the operating table 1. A mounting groove 3 is provided on the top of each movable support 2, and a mounting block 4 is installed inside the mounting groove 3. A chuck device 5 is fixedly connected to one end of each mounting block 4. Circular grooves 6 are provided on both sides of each mounting block 4, and a first spring 7 is fixedly connected inside each circular groove 6. A connecting block 8 is fixedly connected to the other end of each first spring 7. Circular through holes 9 are provided on both sides of each movable support 2. The surface of the connecting block 8 is slidably connected to the inside of the circular through hole 9. A push rod 10 is slidably connected inside the circular through hole 9. By pressing the push rod 10, the push rod 10 pushes the connecting block 8, moving the connecting block 8 out of the circular through hole 9. The connection between bracket 2 and mounting block 4 is released. At this time, mounting block 4 and the chuck device 5 connected to mounting block 4 can be removed from the device. Install the required chuck device 5 according to the needs of the workpiece. When reinstalling, press the connecting block 8 to press it into the inside of the circular groove 6. Then place the mounting block 4 into the inside of the mounting groove 3. Then release the press on the connecting block 8, so that the first spring 7 pushes the connecting block 8 and allows the connecting block 8 to enter the inside of the circular through hole 9, so that the mounting block 4 is repositioned and connected with the movable bracket 2. This setting allows users to freely select different specifications of chuck devices 5 according to the shape of the workpiece and the processing task. It can avoid the need to adjust the processing steps or perform multiple clamping due to the mismatch of chuck devices 5, thereby simplifying the processing process and improving production efficiency.
[0022] Reference Figure 3 and Figure 4As shown in this embodiment: dovetail grooves 11 are provided on both sides of the mounting block 4, and dovetail blocks 12 are fixedly connected to both sides of the mounting groove 3. The surface of the dovetail block 12 and the inside of the dovetail groove 11 are interlocked. By interlocking the dovetail block 12 with the dovetail groove 11, the mounting block 4 can be more stable inside the mounting groove 3, avoiding vibration caused by equipment processing.
[0023] Reference Figure 3 As shown in this embodiment: the surface of the connecting block 8 is fixedly connected to the limiting plate 13, and the surface of the limiting plate 13 is slidably connected to the inside of the circular groove 6. By setting the limiting plate 13, the movement position of the connecting block 8 can be effectively restricted, preventing one end of the connecting block 8 from coming out of the inside of the circular groove 6, and ensuring the stability of the connection between the mounting block 4 and the movable bracket 2.
[0024] Reference Figure 4 As shown in this embodiment: sliding grooves 14 are provided at the top and bottom of the surface of the push rod 10, and sliding blocks 15 are fixedly connected to the top and bottom of the side of the circular through hole 9. The surface of the sliding block 15 is slidably connected to the inside of the sliding groove 14. By making the sliding block 15 slide inside the sliding groove 14, the movement of the push rod 10 can be made more stable, and unnecessary displacement of the push rod 10 during movement can be avoided.
[0025] Reference Figure 4 As shown in this embodiment: a second spring 16 is slidably connected to the surface of the push rod 10. One end of the second spring 16 is fixedly connected to one side of the push rod 10, and the other end of the second spring 16 is fixedly connected to one side inside the circular through hole 9. By setting the second spring 16, the elasticity of the second spring 16 can limit the movement of the push rod 10. At the same time, when the user releases the push rod 10, it will drive the push rod 10 to automatically reset.
[0026] Reference Figure 2 and Figure 5 As shown in this embodiment: the movable support 2 has a through groove 17 inside, and a support frame 18 is slidably connected inside the through groove 17. A square plate 19 is fixedly connected to one end of the movable support 2. A threaded support rod 20 is threadedly connected inside the square plate 19. The top of the threaded support rod 20 is rotatably connected to the inside of the support frame 18. A support plate 21 is fixedly connected to the top of one end of the support frame 18. By turning the threaded support rod 20, the threaded support rod 20 pushes the support frame 18, causing the support frame 18 to move the support plate 21. The position of the support frame 18 can be adjusted according to the size of the workpiece. By setting the support frame 18 and the support plate 21, the support plate 21 can support the workpiece at the bottom, eliminate local suspension, suppress vibration, and make the workpiece more stable during processing.
[0027] Reference Figure 5As shown in this embodiment, a rubber pad 22 is installed at the top of the support plate 21. By setting the rubber pad 22, the coefficient of friction between the workpiece and the rubber pad 22 can be increased, thereby enhancing its stability.
[0028] Working principle: By pressing the push rod 10, the connecting block 8 is pushed out of the circular through hole 9. At this time, the connection between the moving bracket 2 and the mounting block 4 is released. The mounting block 4 and the chuck device 5 connected to the mounting block 4 can then be removed from the device. The required chuck device 5 can be installed according to the needs of the workpiece. During reinstallation, the connecting block 8 is pressed into the circular groove 6. Then, the mounting block 4 is placed in the mounting groove 3. Then, the pressing of the connecting block 8 is released, and the first spring 7 pushes the connecting block 8, allowing the connecting block 8 to enter the circular through hole 9. The mounting block 4 is then repositioned and connected to the moving bracket 2. This setting allows users to freely select different specifications of chuck devices 5 according to the shape of the workpiece and the processing task. It can avoid the need for processing step adjustments or multiple clamping due to mismatch of chuck devices 5, thereby simplifying the processing flow and improving production efficiency. By engaging the dovetail block 12 with the dovetail groove 11, the mounting block 4 can be more stable inside the mounting groove 3, avoiding the need for equipment processing. Vibration is generated. The limiting plate 13 can effectively limit the movement of the connecting block 8, preventing one end of the connecting block 8 from coming out of the inside of the circular groove 6, and ensuring the stability of the connection between the mounting block 4 and the moving bracket 2. By allowing the sliding block 15 to slide inside the sliding groove 14, the movement of the push rod 10 can be made more stable, avoiding unnecessary displacement of the push rod 10 during movement. By setting the second spring 16, the elasticity of the second spring 16 can limit the movement of the push rod 10. At the same time, when the user releases the push rod 10, it will drive the push rod 10 to automatically reset. By turning the threaded support rod 20, the threaded support rod 20 pushes the support frame 18, causing the support frame 18 to drive the support plate 21 to move. The position of the support frame 18 can be adjusted according to the size of the processed plate. By setting the support frame 18 and the support plate 21, the support plate 21 can support the processed workpiece at the bottom, eliminate local suspension, suppress vibration, and make the workpiece more stable during processing. By setting the rubber pad 22, the friction coefficient between the workpiece and the rubber pad 22 can be increased, enhancing its stability.
[0029] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.
Claims
1. A positioning fixture for grinding large workpieces, comprising an operating table (1), characterized in that: The operating table (1) has two movable supports (2) slidably connected at both ends. The top of the movable support (2) is provided with an installation groove (3). An installation block (4) is installed inside the installation groove (3). A clamping device (5) is fixedly connected to one end of the installation block (4). Circular grooves (6) are provided on both sides of the installation block (4). A first spring (7) is fixedly connected inside the circular groove (6). A connecting block (8) is fixedly connected to the other end of the first spring (7). Circular through holes (9) are provided on both sides of the movable support (2). The surface of the connecting block (8) is slidably connected to the inside of the circular through hole (9). A push rod (10) is slidably connected inside the circular through hole (9).
2. The positioning fixture for grinding large workpieces according to claim 1, characterized in that: The mounting block (4) has dovetail grooves (11) on both sides, and dovetail blocks (12) are fixedly connected to both sides of the mounting groove (3). The surface of the dovetail block (12) is engaged with the inside of the dovetail groove (11).
3. A positioning fixture for grinding large workpieces according to claim 1, characterized in that: The surface of the connecting block (8) is fixedly connected to a limiting plate (13), and the surface of the limiting plate (13) is slidably connected to the inside of the circular groove (6).
4. A positioning fixture for grinding large workpieces according to claim 1, characterized in that: The push rod (10) has sliding grooves (14) at the top and bottom. The circular through hole (9) has sliding blocks (15) fixedly connected to the top and bottom. The surface of the sliding block (15) is slidably connected to the inside of the sliding groove (14).
5. A positioning fixture for grinding large workpieces according to claim 1, characterized in that: The surface of the push rod (10) is slidably connected to a second spring (16). One end of the second spring (16) is fixedly connected to one side of the push rod (10), and the other end of the second spring (16) is fixedly connected to one side of the inside of the circular through hole (9).
6. A positioning fixture for grinding large workpieces according to claim 1, characterized in that: The movable support (2) has a through groove (17) inside, and a support frame (18) is slidably connected inside the through groove (17). A square plate (19) is fixedly connected to one end of the movable support (2). A threaded support rod (20) is threadedly connected inside the square plate (19). The top of the threaded support rod (20) is rotatably connected to the inside of the support frame (18). A support plate (21) is fixedly connected to the top of one end of the support frame (18).
7. A positioning fixture for grinding large workpieces according to claim 6, characterized in that: A rubber pad (22) is installed at the top of the support plate (21).