Positioning tool for cutting curved workpieces

Abstract

The application relates to a positioning tool for cutting a curved workpiece, and belongs to the technical field of positioning tools. The positioning tool comprises a supporting plate, a limiting assembly, a positioning assembly and a fixing assembly. The limiting assembly, the positioning assembly and the fixing assembly are connected to the supporting plate. The limiting assembly is used for limiting the movement of the workpiece on the supporting plate. The positioning assembly is used for positioning the workpiece on the supporting plate. The fixing assembly is used for pressing the workpiece on the supporting plate. The positioning assembly can adjust its length according to the width of the workpiece, so as to ensure that the workpiece is accurately aligned and positioned in the width direction. The limiting assembly can adjust its length according to the length of the workpiece, so as to firmly clamp workpieces with different lengths. The fixing assembly has two adjustment functions of stretching and rotating, so that it can be flexibly moved to a suitable position, thereby effectively avoiding the area needing cutting processing on the workpiece, avoiding interference with the tool path, and guaranteeing processing safety.

Description

Technical Field

[0001] This application relates to the technical field of positioning fixtures, and in particular to a positioning fixture for cutting curved workpieces. Background Technology

[0002] In the field of machining, the machining of curved workpieces has always been one of the technical challenges, especially the cutting of high-precision curved workpieces, such as engine hoods. Engine hoods made by casting sometimes need to be machined before they can be put into use.

[0003] Due to the complexity of curved surface shapes, traditional positioning fixtures are difficult to clamp curved workpieces. Although there are special fixtures on the market for clamping curved workpieces, these fixtures are not suitable for workpieces with various curved surface shapes. Therefore, when processing curved workpieces of different shapes, different special fixtures for curved surfaces are required, which not only increases labor intensity but also affects work efficiency. Utility Model Content

[0004] In order to reduce labor intensity and improve work efficiency, this application provides a positioning fixture for cutting curved workpieces.

[0005] The positioning fixture for cutting curved workpieces provided in this application adopts the following technical solution: A positioning fixture for cutting curved workpieces includes a support plate, a positioning assembly, and a fixing assembly. Both the positioning and fixing assemblies are connected to the support plate. The positioning assembly positions the workpiece on the support plate, and the fixing assembly presses the workpiece firmly onto the support plate. The positioning assembly includes a positioning frame and a sliding rod. The sliding rod is slidably connected to the support plate, and the positioning frame is connected to the end of the sliding rod. The positioning frame is used to position the edge of the workpiece. The fixing assembly includes a support rod, a connecting frame, a second screw, and an abutment block. The support rod is connected to the support plate, the connecting frame is slidably connected to the support rod, the second screw is threadedly connected to the connecting frame, and the abutment block is connected to the end of the second screw. The second screw presses the workpiece firmly onto the support plate via the abutment block.

[0006] By adopting the above technical solution, the workpiece is positioned on the support plate by the positioning component, the workpiece is restricted on the support plate by the limiting component, and the workpiece is pressed on the support plate by the fixing component. The positioning component can adjust its own length according to the width of the workpiece to ensure that the workpiece is accurately aligned and positioned in the width direction. The fixing component has two adjustment functions: extension and rotation, so that it can be flexibly moved to a suitable position, thereby effectively avoiding the area on the workpiece that needs to be cut, avoiding interference with the tool path, and ensuring machining safety.

[0007] Preferably, the positioning component further includes a pushing member, which is sleeved on the sliding rod, with one end of the pushing member pushing against the sliding rod and the other end of the pushing member pushing against the support plate.

[0008] By adopting the above technical solution, the pushing member is used to reset the sliding rod and the positioning frame connected to the sliding rod. After the workpiece is placed on the positioning frame, the positioning frame is pressed against the workpiece under the action of the pushing member, thereby squeezing the workpiece onto the support plate.

[0009] Preferably, the positioning frame is provided with a placement slot.

[0010] By adopting the above technical solution, the placement slot opened on the positioning frame facilitates the placement of workpieces.

[0011] Preferably, the fixing component further includes a tensioning member, one end of which is connected to the support rod and the other end of which is connected to the connecting frame.

[0012] By adopting the above technical solution, after the workpiece is processed and removed from the support plate, the connecting frame is reset to its original position by the tensioning component. When processing the next workpiece, the connecting frame needs to be pulled to the required position again, and then the second screw is adjusted to press the workpiece.

[0013] Preferably, a first connecting block is connected to the support rod, a second connecting block is connected to the connecting frame, and a tensioning member connects the first connecting block and the second connecting block.

[0014] By adopting the above technical solution, the first connecting block is fixed on the support rod, and the second connecting block is fixed on the connecting frame. These two connecting blocks become precise positioning reference points. The tensioning member connects these two points and applies tension, forcibly tensioning the connecting frame relative to the support rod and fixing it in a preset relative position.

[0015] Preferably, the fixing component further includes a support shaft connected to a support plate, a support rod connected to the support shaft, and a connecting disc connected to the support shaft for limiting the support rod.

[0016] By adopting the above technical solution, the support shaft is the connecting hub of the support rod; the support shaft provides the installation foundation and rotation center for the support rod.

[0017] Preferably, a positioning fixture for cutting curved workpieces further includes a limiting component, which is used to restrict the movement of the workpiece on a support plate. The limiting component includes a first screw and a limiting member. The limiting member is slidably connected to the support plate. One end of the first screw is rotatably connected to the support plate. The first screw is also connected to the limiting member. The first screw is used to drive the limiting member to slide on the support plate.

[0018] By adopting the above technical solution, the workpiece is restricted to the support plate by the limiting component. The limiting component can adjust its own length according to the length of the workpiece so as to firmly clamp workpieces of different lengths.

[0019] Preferably, the limiting component includes a sliding plate, a threaded connecting block, and a limiting plate. The sliding plate is slidably connected to the support plate, the limiting plate is connected to the sliding plate, the threaded connecting block is connected to the sliding plate, and the first screw is threadedly connected to the threaded connecting block.

[0020] By adopting the above technical solution, the first screw is rotated to drive the sliding plate to move on the support plate, and the limiting plate moves with the sliding plate, thereby limiting the workpiece on the support plate.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The workpiece is positioned on the support plate by the positioning component, restricted on the support plate by the limiting component, and pressed on the support plate by the fixing component. The positioning component can adjust its length according to the width of the workpiece to ensure that the workpiece is accurately aligned and positioned in the width direction. The limiting component can adjust its length according to the length of the workpiece to firmly clamp workpieces of different lengths. The fixing component has both telescopic and rotation adjustment functions, allowing it to move flexibly to a suitable position, thereby effectively avoiding the area on the workpiece that needs to be cut, avoiding interference with the tool path, and ensuring machining safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the overall structure in the embodiments of this application.

[0023] Figure 2 This is a structural schematic diagram illustrating the positioning component in the embodiments of this application.

[0024] Figure 3 This is a schematic diagram illustrating the structure of the limiting component in the embodiments of this application.

[0025] Figure 4 This is a schematic diagram illustrating the installation positions of the fixing component and the support plate in the embodiments of this application.

[0026] Figure 5 This is a structural schematic diagram used to illustrate the fixed component in the embodiments of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Support plate; 11. Mounting groove; 2. Limiting component; 21. Second support block; 211. Support groove; 212. Rotating connecting block; 22. First screw; 221. First limiting block; 222. Second limiting block; 23. Limiting element; 231. Sliding plate; 2311. Threaded connecting block; 232. Limiting plate; 3. Positioning component; 31. First support block; 32. Positioning frame; 321. Placement groove; 33. Sliding rod; 34. Connecting rod; 35. Pushing element; 4. Fixing component; 41. Support shaft; 411. Connecting plate; 42. Support rod; 421. First connecting block; 43. Connecting frame; 431. Second connecting block; 44. Tensioning element; 45. Second screw; 46. Abutting block. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0029] This application discloses a positioning fixture for cutting curved workpieces, referring to... Figure 1 It includes a support plate 1, a limiting component 2, a positioning component 3, and a fixing component 4. The limiting component 2, the positioning component 3, and the fixing component 4 are all connected to the support plate 1. The limiting component 2 is used to restrict the movement of the workpiece on the support plate 1, the positioning component 3 is used to position the workpiece on the support plate 1, and the fixing component 4 is used to press the workpiece tightly on the support plate 1.

[0030] Reference Figures 1-2 In this embodiment, four sets of positioning components 3 are provided, and the four sets of positioning components 3 are symmetrically arranged in pairs on the two long axes of the support plate 1. This embodiment takes one set of positioning components 3 as an example for description. The support plate 1 has an installation groove 11, which is an open groove. The opening direction of the installation groove 11 is away from the center of the support plate 1. The positioning component 3 includes a first support block 31, a positioning frame 32, a sliding rod 33, a connecting rod 34, and a pushing member 35. The first support block 31 is fixedly connected to the support plate 1 and located at the opening of the installation groove 11. Two sliding rods 33 are provided, and both sliding rods 33 are slidably connected to the first support block 31 along the short axis direction of the support plate 1. The connecting rod 34 is fixedly connected to the same end of the two sliding rods 33 and is located inside the installation groove 11. The positioning frame 32 is fixedly connected to the other end of the sliding rod 33 and is located outside the installation groove 11. The positioning frame 32 has a placement groove 321, which is used to place the edge of the workpiece. Two pushers 35 are provided, and the two pushers 35 are respectively sleeved on the two sliding rods 33. In this embodiment, the pusher 35 is a pusher spring, and the two ends of the pusher spring push against the connecting rod 34 and the first support block 31 respectively.

[0031] Reference Figures 1-2The positioning frame 32 is moved away from the support plate 1, compressing the push spring. If the positioning frame 32 is released at this time, the push spring releases its compression force, pulling the positioning frame 32 back to its original position. The workpiece is placed on the support plate 1, and then the positioning frames 32 of the four positioning components 3 are pulled sequentially according to the actual contour shape of the workpiece, so that the placement slots 321 on the positioning frames 32 are tightly attached to and locked against the corresponding outer edge of the workpiece. When all four positioning frames 32 are pulled into place, the entire outer contour of the workpiece is stably positioned in the four placement slots 321.

[0032] Reference Figure 1 and Figure 3 In this embodiment, the support plate 1 is a rectangular plate, and two sets of limiting components 2 are provided. The two sets of limiting components 2 are respectively connected to the two short axes of the support plate 1. The limiting components 2 are used to restrict the movement of the workpiece along the long axis of the support plate 1. This embodiment takes one set of limiting components 2 as an example for description. The limiting component 2 includes a second support block 21, a rotating connecting block 212, a first screw 22, and a limiting member 23. The upper end of the second support block 21 is fixedly connected to the bottom wall of the end of the support plate 1 in the length direction. A support groove 211 is opened on the second support block 21. The rotating connecting block 212 is fixedly connected to the bottom wall of the second support block 21. The limiting member 23 includes a sliding plate 231, a threaded connecting block 2311, and a limiting plate 232. The sliding plate 231 is slidably connected to the support groove 211, and the limiting plate 232 is vertically fixedly connected to the top wall of the end of the sliding plate 231. The threaded connecting block 2311 is fixedly connected to the top wall of the end of the sliding plate 231. The first screw 22 is fixedly connected to the bottom wall of the sliding plate 231. One end of the first screw 22 near the center of the support plate 1 is rotatably connected to the rotating connecting block 212. The first screw 22 is also fixedly connected to the first limiting block 221 and the second limiting block 222. The first limiting block 221 and the second limiting block 222 are used to limit the movement of the first screw 22 on the rotating connecting block 212. The threaded connecting block 2311 has a threaded hole, and the rotating connecting block 212 has a support hole. The threaded hole on the threaded connecting block 2311 is coaxial with the support hole on the rotating connecting block 212 for supporting the rotation of the first screw 22. The first screw 22 is threadedly connected to the threaded connecting block 2311.

[0033] Reference Figures 1-3 After the workpiece is positioned on the support plate 1 by the positioning component 3, the first screw 22 is rotated, and the sliding plate 231 and the limiting plate 232 connected to the sliding plate 231 are driven by the threaded connecting block 2311 to move towards the center of the support plate 1, so that the side of the limiting plate 232 facing the support plate 1 is pressed against the workpiece, thereby restricting the workpiece from moving along the long axis of the support plate 1.

[0034] Reference Figure 1 , Figure 4 and Figure 5In this embodiment, four sets of fixing components 4 are provided, and the four sets of fixing components 4 are respectively arranged at the four corners of the support plate 1. This embodiment takes one set of fixing components 4 as an example for description. The fixing component 4 includes a support shaft 41, a support rod 42, a connecting frame 43, a tensioning member 44, a second screw 45, and a contact block 46. The support shaft 41 is vertically fixedly connected to the bottom wall of the support plate 1 and is located at one corner of the rectangular support plate 1. The end of the support rod 42 near the support plate 1 is rotatably connected to the support shaft 41. The lower end of the support shaft 41 is fixedly connected to a connecting plate 411, which is used to restrict the downward movement of the support rod 42. The end of the support rod 42 away from the support plate 1 has a telescopic groove. In this embodiment, the connecting frame 43 is a C-shaped frame, and the lower end of the connecting frame 43 slides. A first connecting block 421 is fixedly connected to the side wall of the support rod 42 within the telescopic groove, and a second connecting block 431 is provided on the side wall of the connecting frame 43. A tensioning member 44 is provided between the first connecting block 421 and the second connecting block 431. In this embodiment, the tensioning member 44 is a tension spring. A second threaded hole for connecting the second screw 45 is opened at the upper end of the connecting frame 43. The second screw 45 is connected in the second threaded hole and is vertically arranged on the connecting frame 43. An abutment block 46 is rotatably connected to the lower end of the second screw 45. By rotating the second screw 45, the second screw 45 moves downward and the workpiece is fixed on the support plate 1 by the abutment block 46.

[0035] Reference Figure 1 , Figure 4 and Figure 5 By sliding the connecting bracket 43 on the support rod 42, the radial position of the second screw 45 relative to the support plate 1 can be adjusted. By rotating the support rod 42, the circumferential position of the second screw 45 relative to the support plate 1 can be adjusted. By combining these two adjustment methods, the second screw 45 can be precisely positioned and stopped at any point in the target area above the workpiece, thereby effectively preventing the second screw 45 and the abutment block 46 connected to the second screw 45 from the cutting position on the workpiece. The function of the tension spring is that after the workpiece is processed and removed from the support plate 1, the connecting bracket 43 is reset to its original position by the tension spring. When processing the next workpiece, the connecting bracket 43 needs to be pulled to the required position again, and then the second screw 45 is adjusted to clamp the workpiece.

[0036] Reference Figure 1 , Figure 4 and Figure 5 After the workpiece is positioned on the support plate 1 by the positioning component 3, the workpiece is fixed on the support plate 1 by the four sets of fixing components 4. Specifically, the connecting frame 43 is pulled and moved away from the support plate 1, and then the second screw 45 is rotated so that the abutment block 46 abuts against the workpiece, thereby fixing the workpiece on the support plate 1.

[0037] The implementation principle of a positioning fixture for cutting curved workpieces according to an embodiment of this application is as follows: the workpiece is placed on the support plate 1, and the limiting member 23 is moved closer to the support plate 1 by rotating the first screw 22, thereby limiting the workpiece on the support plate 1. Then, according to the contour shape of the workpiece, the positioning frame 32 of the four positioning components 3 is pulled in sequence to position the workpiece on the support plate 1. Finally, the workpiece is fixed on the support plate 1 by the fixing component 4.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A positioning fixture for cutting curved workpieces, characterized in that: It includes a support plate (1), a positioning component (3) and a fixing component (4). The positioning component (3) and the fixing component (4) are both connected to the support plate (1). The positioning component (3) is used to position the workpiece on the support plate (1), and the fixing component (4) is used to press the workpiece on the support plate (1). The positioning component (3) includes a positioning frame (32) and a sliding rod (33). The sliding rod (33) is slidably connected to the support plate (1). The positioning frame (32) is connected to the end of the sliding rod (33). The positioning frame (32) is used to position the edge of the workpiece. The fixing component (4) includes a support rod (42), a connecting frame (43), a second screw (45), and an abutment block (46). The support rod (42) is connected to the support plate (1), the connecting frame (43) is slidably connected to the support rod (42), the second screw (45) is threadedly connected to the connecting frame (43), and the abutment block (46) is connected to the end of the second screw (45). The second screw (45) presses the workpiece onto the support plate (1) through the abutment block (46).

2. The positioning fixture for cutting curved workpieces according to claim 1, characterized in that: The positioning component (3) further includes a pusher (35), which is sleeved on the sliding rod (33). One end of the pusher (35) pushes against the sliding rod (33), and the other end of the pusher (35) pushes against the support plate (1).

3. The positioning fixture for cutting curved workpieces according to claim 1, characterized in that: The positioning frame (32) is provided with a placement slot (321).

4. A positioning fixture for cutting curved workpieces according to claim 1, characterized in that: The fixing component (4) also includes a tensioning member (44), one end of which is connected to the support rod (42) and the other end of which is connected to the connecting frame (43).

5. A positioning fixture for cutting curved workpieces according to claim 4, characterized in that: The support rod (42) is connected to a first connecting block (421), the connecting frame (43) is connected to a second connecting block (431), and the tensioning member (44) connects the first connecting block (421) and the second connecting block (431).

6. A positioning fixture for cutting curved workpieces according to claim 1, characterized in that: The fixing component (4) also includes a support shaft (41) connected to the support plate (1), and a support rod (42) connected to the support shaft (41). A connecting plate (411) is also connected to the support shaft (41) and is used to limit the support rod (42).

7. A positioning fixture for cutting curved workpieces according to claim 1, characterized in that: It also includes a limiting component (2), which is used to restrict the movement of the workpiece on the support plate (1). The limiting component (2) includes a first screw (22) and a limiting member (23). The limiting member (23) is slidably connected to the support plate (1). One end of the first screw (22) is rotatably connected to the support plate (1). The first screw (22) is also connected to the limiting member (23). The first screw (22) is used to drive the limiting member (23) to slide on the support plate (1).

8. A positioning fixture for cutting curved workpieces according to claim 7, characterized in that: The limiting component (23) includes a sliding plate (231), a threaded connecting block (2311), and a limiting plate (232). The sliding plate (231) is slidably connected to the support plate (1), the limiting plate (232) is connected to the sliding plate (231), the threaded connecting block (2311) is connected to the sliding plate (231), and the first screw (22) is threadedly connected to the threaded connecting block (2311).

Images