Positioning fixture for CNC (computer numerical control) machine tool
By designing a positioning fixture for CNC machine tools, the precise positioning of the workpiece is achieved by using a motor-driven gear and rotating rod. Equipped with a cooling component, the problem of unstable workpiece fixation on CNC machine tools is solved, ensuring machining accuracy and reducing tool wear.
Patent Information
- Application Number
- CN202422966912.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing CNC machine tools have difficulty fixing the workpiece during the machining process, resulting in discrepancies in machining dimensions and errors. If the workpiece is not firmly fixed, it may shift or fall off, affecting machining accuracy.
A positioning fixture for CNC machine tools was designed. The fixture uses a motor to drive gears and a rotating rod to move a spiral block and a clamping plate, thereby achieving precise positioning of the workpiece. It is also equipped with a cooling component to cool down and remove dust, ensuring that the workpiece remains stable during processing.
It achieves precise workpiece positioning, avoids machining errors, ensures the accuracy of machining dimensions, and reduces tool wear and dust diffusion through cooling components.
Smart Images
Figure CN223848640U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CNC machine tool technology, and in particular to a positioning fixture for CNC machine tools. Background Technology
[0002] A CNC machine tool is an automated machine tool equipped with a program control system. It can move and machine parts according to a pre-programmed sequence. For complex parts requiring machining of multiple surfaces and angles, such as automotive engine blocks and aerospace components, positioning fixtures ensure the positional and dimensional accuracy of each machined surface. For example, when machining the various mounting surfaces and holes of an engine block, the positioning fixture precisely fixes the block, preventing displacement or deformation during machining, thus guaranteeing the positional accuracy of each hole and the flatness of each surface of the block.
[0003] CNC machine tools can precisely control the movement trajectory of the cutting tool in three-dimensional space according to a pre-programmed program, thereby machining parts with various complex shapes. For example, parts with complex curved surfaces and internal structures, such as impellers in aircraft engines and cylinder blocks in automobile engines, can be machined with high precision using CNC machine tools.
[0004] In existing technologies, some CNC machine tools have difficulty fixing the workpiece during use. If the workpiece is not firmly fixed, it will undergo slight displacement during processing, resulting in the machined dimensions not matching the design dimensions. For example, when milling a plane, the movement of the workpiece will cause inconsistent milling depth, resulting in flatness errors and dimensional deviations. If the workpiece is not firmly fixed, it may suddenly shift or fall off during processing, which will cause processing interruption, requiring machine stoppage to re-fix the workpiece and adjust processing parameters, wasting a lot of time. Therefore, to address the above shortcomings, a positioning fixture for CNC machine tools is proposed. Utility Model Content
[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a positioning fixture for CNC machine tools, which aims to improve the problem of difficulty in fixing workpieces during use of some CNC machine tools.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A positioning fixture for a CNC machine tool includes a housing. A base is fixedly connected to the bottom inner wall of the housing. A moving assembly for moving a workpiece is fixedly connected to the top of the base. A support plate is fixedly connected to the top of the moving assembly. A moving plate is fixedly connected to the top of the support plate. A positioning box is fixedly connected to the top left side of the moving plate. A fixing box is fixedly connected to the top right side of the moving plate. A motor is fixedly connected to the right side of the fixing box. A rotating rod is fixedly connected to the drive end of the motor. A gear is fixedly connected to the outside of the rotating rod. A rotating rod two is rotatably connected to the front interior of the fixed box. A gear two is fixedly connected to the outside of the rotating rod two. One rotating column is fixedly connected to the outside of the rotating rod one. Another rotating column is fixedly connected to the outside of the rotating rod two. A spiral groove is opened on the outside of the rotating column. A spiral block is slidably connected to the inner wall of the spiral groove. A support frame is fixedly connected to the adjacent side of the two spiral blocks. A sliding column is fixedly connected to the left side of the support frame. A clamping plate is fixedly connected to the left side of the sliding column. A cooling component for cooling the workpiece is fixedly connected inside the moving plate.
[0008] As a further description of the above technical solution:
[0009] The moving component includes two guide rails, the bottoms of which are fixedly connected to the top left and right sides of the base. Sliding blocks are slidably connected to the outside of the guide rails. A fixing plate is fixedly connected to the top of multiple sliding blocks. Guide rails are fixedly connected to the front and rear sides of the top of the fixing plate. Sliding blocks are slidably connected to the outside left and right sides of the guide rails. The tops of multiple sliding blocks are fixedly connected to the bottom of the support plate.
[0010] As a further description of the above technical solution:
[0011] The cooling component includes a water inlet pipe, the outside of which is fixedly connected to the inside of the movable plate. A collection box is fixedly connected to the bottom of the water inlet pipe. A filter box is detachably connected to the inside of the collection box. Pipe 1 is fixedly connected to the right side of the collection box. A water pump is fixedly connected to the right side of pipe 1. Pipe 2 is fixedly connected to the output end of the water pump.
[0012] As a further description of the above technical solution:
[0013] The top of the water pump is fixedly connected to the bottom right side of the movable plate, and the top of the collection box is fixedly connected to the bottom of the support plate.
[0014] As a further description of the above technical solution:
[0015] The water inlet pipe is externally fixedly connected to the inside of the support plate. Water baffles are fixedly connected to the front and rear sides of the top of the movable plate. The left sides of the two water baffles are fixedly connected to the front and rear sides of the right side of the positioning box, and the right sides of the two water baffles are fixedly connected to the front and rear sides of the left side of the fixed box.
[0016] As a further description of the above technical solution:
[0017] The upper and lower sides of the inside of the fixed box are fixed with limit posts, and the upper and lower sides of the inside of the support frame are slidably connected to the outside of the limit posts.
[0018] As a further description of the above technical solution:
[0019] The external teeth of the second gear are meshed with the external teeth of the first gear, and the external rotating rod is rotatably connected to the inside of the right side of the fixed box.
[0020] As a further description of the above technical solution:
[0021] A limiting plate is fixedly connected to the right side of the positioning box, and the right side of the limiting plate is fixedly connected to the left side of the fixed box. The outside of the clamping plate is slidably connected to the outside of the limiting plate. A control panel is fixedly connected to the front side of the housing, and a door is rotatably connected to the front side of the housing.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, by starting the motor, the motor drives the first rotating rod to rotate, the first rotating rod drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the second rotating rod to rotate, the second rotating rod drives the rotating column to rotate, the first rotating rod drives the rotating column to rotate, the rotating column drives the spiral block to move, the spiral block drives the support frame to move, the support frame drives the sliding column to slide, and the sliding column drives the clamping plate to move, thereby fixing the workpiece and accurately fixing the workpiece so that it always stays in the correct position during the processing, thereby avoiding processing errors caused by workpiece movement and ensuring the accuracy of processing dimensions.
[0024] 2. In this utility model, after the water pump is started, the water in the collection tank enters the water pump through pipe one, and the water in the water pump enters the nozzle through pipe two. The water sprayed out by pipe two carries iron filings and enters the filter box through the water inlet pipe. Under the action of the filter box, the workpiece is cooled and dust is removed during cutting, which can reduce the wear and thermal deformation of the tool and collect the dust to prevent it from spreading into the air. Attached Figure Description
[0025] Figure 1 This is a perspective view of a positioning fixture for a CNC machine tool proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the door structure of a positioning fixture for a CNC machine tool proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the moving plate structure of a positioning fixture for a CNC machine tool proposed in this utility model;
[0028] Figure 4 This is a schematic diagram of the internal structure of the fixing box of a positioning fixture for a CNC machine tool proposed in this utility model;
[0029] Figure 5 This is a schematic diagram of the rotating column structure of a positioning fixture for a CNC machine tool proposed in this utility model;
[0030] Figure 6 This is a schematic diagram of the internal structure of the collection box of a positioning fixture for CNC machine tools proposed in this utility model.
[0031] Legend:
[0032] 1. Shell; 2. Base; 3. Guide rail one; 4. Sliding block one; 5. Fixing plate; 6. Guide rail two; 7. Sliding block two; 8. Support plate; 9. Moving plate; 10. Positioning box; 11. Fixing box; 12. Motor; 13. Rotating rod one; 14. Gear one; 15. Rotating rod two; 16. Gear two; 17. Rotating column; 18. Spiral groove; 19. Spiral block; 20. Support frame; 21. Sliding column; 22. Clamping plate; 23. Water inlet pipe; 24. Collection box; 25. Filter box; 26. Pipe one; 27. Water pump; 28. Pipe two; 29. Water baffle; 30. Limiting plate; 31. Limiting column; 32. Control panel; 33. Box door. Detailed Implementation
[0033] 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 protection scope of the present utility model.
[0034] Reference Figures 3 to 5This utility model provides an embodiment of a positioning fixture for a CNC machine tool, comprising a housing 1, which provides overall protection and support. A base 2, fixedly connected to the inner wall of the housing 1, provides a stable foundation for the entire device. Two guide rails 3 in the moving assembly are fixed to the top left and right sides of the base 2. Guide rails 3 cooperate with sliding blocks 4, allowing sliding blocks 4 to slide on guide rails 3, thereby driving the top fixed plate 5 to move left and right. Guide rails 6 on the front and rear sides of the top of the fixed plate 5 cooperate with sliding blocks 7, allowing sliding blocks 7 to slide on guide rails 6, driving a support plate 8 to move back and forth, thus achieving multi-directional movement and adjustment of the workpiece. The moving plate 9 on the top of the support plate 8 provides an installation platform for other components. The positioning box 10 on the top left of the moving plate 9 is used to assist in determining the position of the workpiece, and the fixed box 11 on the top right of the moving plate 9 houses the motor 1. The second component provides installation space. After the motor 12 starts, it drives the rotating rod 13 to rotate, and the gear 14 on the rotating rod 13 rotates accordingly. The gear 14 meshes with the gear 2 16, driving the gear 2 16 to rotate. The gear 2 16 is mounted on the rotating rod 2 15, causing the rotating rod 2 15 to rotate. The rotating rod 13 and the rotating rod 2 15 respectively drive the rotating column 17 on their respective external surfaces to rotate. The spiral groove 18 on the outside of the rotating column 17 cooperates with the spiral block 19. When the rotating column 17 rotates, the spiral block 19 moves along the spiral groove 18. The two spiral blocks 19 drive the support frame 20 to move, and the sliding column 21 on the left side of the support frame 20 moves accordingly. The clamping plate 22 on the left side of the sliding column 21 is used to clamp the workpiece, thereby fixing the workpiece and ensuring that the workpiece always stays in the correct position during processing, avoiding processing errors caused by workpiece movement, and ensuring the accuracy of processing dimensions.
[0035] Reference Figure 1 , Figure 2 and Figure 6 In the cooling assembly, the water inlet pipe 23 is fixed inside the moving plate 9 and the support plate 8. The collection box 24 connected to its bottom is used to collect water and iron filings. The filter box 25 inside the collection box 24 can filter impurities such as iron filings. The pipe 26 on the right side of the collection box 24 is connected to the water pump 27. The output end of the water pump 27 is connected to the pipe 28. After the water pump 27 is started, the water in the collection box 24 enters the water pump 27 through the pipe 26 and is then output by the water pump 27 through the pipe 28 to cool and remove dust from the workpiece. The baffle plates 29 on the front and rear sides of the top of the moving plate 9 prevent water from splashing out. The positioning box 10 is connected to the left side and the fixed box 11 is connected to the right side. The limiting posts 31 on the upper and lower sides inside the fixed box 11 guide the movement of the support frame 20. The limiting plate 30 on the right side of the positioning box 10 restricts the movement direction of the clamping plate 22. The control panel 32 on the front side of the housing 1 is used to control the operation of the entire device. The door 33 facilitates the operation and maintenance of the device.
[0036] Working principle: When it is necessary to fix the workpiece, the motor 12 is started, which drives the rotating rod 13 to rotate. The rotating rod 13 drives the gear 14 to rotate, which in turn drives the gear 16 to rotate. The gear 16 drives the rotating rod 15 to rotate, which in turn drives the rotating column 17 to rotate. The rotating rod 13 drives the rotating column 17 to rotate, which in turn drives the spiral block 19 to move. The spiral block 19 drives the support frame 20 to move, which in turn drives the sliding column 21 to slide. The sliding column 21 then drives the clamping plate 22 to move, thus fixing the workpiece. This allows the workpiece to be precisely fixed and kept in the correct position during processing, avoiding processing errors caused by workpiece movement and ensuring the accuracy of the processing dimensions.
[0037] When it is necessary to cool down and remove dust from the workpiece, the water pump 27 is started. Water in the collection box 24 enters the water pump 27 through pipe 1 26, and water in the water pump 27 enters the nozzle through pipe 28. The water sprayed from pipe 28 carries iron filings and enters the filter box 25 through the water inlet pipe 23. Under the action of the filter box 25, the workpiece is cooled down and dust is removed during cutting. This reduces the wear and thermal deformation of the cutting tool and collects the dust to prevent it from spreading into the air.
[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is 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 CNC machine tools, comprising a housing (1), characterized in that: The bottom inner wall of the shell (1) is fixedly connected with a base (2), the top of the base (2) is fixedly connected with a moving assembly for moving the workpiece, the top of the moving assembly is fixedly connected with a support plate (8), the top of the support plate (8) is fixedly connected with a moving plate (9), the top left side of the moving plate (9) is fixedly connected with a positioning box (10), the top right side of the moving plate (9) is fixedly connected with a fixed box (11), the right side of the fixed box (11) is fixedly connected with a motor (12), the driving end of the motor (12) is fixedly connected with a rotating rod one (13), the outside of the rotating rod one (13) is fixedly connected with a gear one (14), the front inner side of the fixed box (11) is rotatably connected with a rotating rod two (15), the outside of the rotating rod two (15) is fixedly connected with a gear two (16), the outside of the rotating rod one (13) is fixedly connected with one of the rotating columns (17), the outside of the rotating rod two (15) is fixedly connected with the other rotating column (17), the outside of the rotating column (17) is provided with a spiral groove (18), the inner wall of the spiral groove (18) is slidably connected with a spiral block (19), the proximal side of the two spiral blocks (19) is fixedly connected with a support frame (20), the left side of the support frame (20) is fixedly connected with a sliding column (21), the left side of the sliding column (21) is fixedly connected with a clamping plate (22), and the inside of the moving plate (9) is fixedly connected with a cooling assembly for cooling the workpiece.
2. A positioning fixture for CNC machine tools according to claim 1, characterized in that: The moving assembly comprises two guide rails one (3), the bottoms of the two guide rails one (3) are fixedly connected to the top left and right sides of the base (2), the outside of the guide rail one (3) is slidably connected with a sliding block one (4), the top of the plurality of sliding block one (4) is fixedly connected with a fixed plate (5), the top of the fixed plate (5) is fixedly connected with a guide rail two (6) on the front and back sides, the outside of the guide rail two (6) is slidably connected with a sliding block two (7) on the left and right sides, and the top of the plurality of sliding block two (7) is fixedly connected to the bottom of the support plate (8).
3. A positioning fixture for CNC machine tools according to claim 2, characterized in that: The cooling assembly comprises a water inlet pipe (23), the outside of the water inlet pipe (23) is fixedly connected to the inside of the moving plate (9), the bottom of the water inlet pipe (23) is fixedly connected with a collection box (24), the inside of the collection box (24) is detachably connected with a filter box (25), the right side of the collection box (24) is fixedly connected with a pipeline one (26), the right side of the pipeline one (26) is fixedly connected with a water pump (27), and the output end of the water pump (27) is fixedly connected with a pipeline two (28).
4. A positioning fixture for CNC machine tools according to claim 3, characterized in that: The top of the water pump (27) is fixedly connected to the bottom right side of the moving plate (9), and the top of the collection box (24) is fixedly connected to the bottom of the support plate (8).
5. The positioning fixture for CNC machine tools according to claim 3, characterized in that: The outer part of the water inlet pipe (23) is fixedly connected to the inner part of the support plate (8), the top of the moving plate (9) is fixedly connected with two water baffle plates (29), the left sides of the two water baffle plates (29) are fixedly connected to the right sides of the positioning box (10), and the right sides of the two water baffle plates (29) are fixedly connected to the left sides of the fixed box (11).
6. A positioning fixture for CNC machine tools according to claim 1, characterized in that: The inner part of the fixed box (11) is fixedly connected with two limiting columns (31) on the upper and lower sides, and the inner part of the support frame (20) is slidingly connected to the outer part of the limiting columns (31).
7. The positioning fixture for CNC machine tools according to claim 1, characterized in that: The outer teeth of the gear two (16) are in meshing connection with the outer teeth of the gear one (14), and the outer part of the rotating rod one (13) is rotatably connected to the right inner part of the fixed box (11).
8. The positioning fixture for CNC machine tools according to claim 1, characterized in that: The right side of the positioning box (10) is fixedly connected with a limiting plate (30), the right side of the limiting plate (30) is fixedly connected to the left side of the fixed box (11), the outer part of the clamping plate (22) is slidingly connected to the outer part of the limiting plate (30), the front side of the shell (1) is fixedly connected with a control panel (32), and the front side of the shell (1) is rotatably connected with a box door (33).