Positioning tool for machining parts

Abstract

The utility model discloses a positioning frock for part processing relates to part processing device technical field, the utility model discloses a work table is provided with locking mechanism and centering clamping mechanism on, locking mechanism includes two U shape support plate fixedly connected in the work table bottom, two the U shape support plate between rotatoryly connected with pivot no.

Description

Technical Field

[0001] This utility model belongs to the technical field of parts processing equipment, and in particular relates to a positioning fixture for parts processing. Background Technology

[0002] Positioning fixtures are required for parts machining because they ensure that the parts have an accurate and stable position relative to the machine tool and cutting tool during the machining process. This ensures machining accuracy and prevents parts from being scrapped due to positioning deviations. At the same time, fixtures can significantly shorten the clamping time of parts, improve the efficiency of mass production, and meet the needs of automated production lines. With the continuous improvement of the precision requirements of modern manufacturing, positioning fixture technology in parts machining has also been rapidly developed and widely used.

[0003] However, existing positioning fixtures for parts processing are difficult to keep the clamping plate in a clamping state during use. As the processing time increases, the clamping plate will loosen, which will lead to the positioning of the parts being offset, resulting in problems such as dimensional deviation and non-compliance of form and position tolerances, thus affecting the part qualification rate. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning fixture for parts processing. By setting a locking mechanism, it solves the problem that existing positioning fixtures for parts processing are difficult to keep the clamping plate in a clamping state during use. As the processing time increases, the clamping plate will loosen, which will lead to the positioning of the parts being offset, resulting in problems such as dimensional deviation and non-compliance of form and position tolerances, thus affecting the part qualification rate.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a positioning fixture for parts processing, including a worktable, on which a locking mechanism and a centering clamping mechanism are provided; The locking mechanism includes two U-shaped support plates fixedly connected to the bottom of the workbench, and a rotating shaft is rotatably connected between the two U-shaped support plates. The front side of the rotating shaft passes through the U-shaped support plate located on the front side, and a handle is fixedly connected to the front extension of the rotating shaft. The centering clamping mechanism includes a rotating shaft rotatably connected to the bottom of the workbench.

[0006] Furthermore, a locking ring is fitted on the outer wall of the first rotating shaft, the rear side of the locking ring is fixedly connected to the U-shaped support plate located on the front side, and a second locking ring is fitted on the outer wall of the first rotating shaft.

[0007] Furthermore, the front side of the locking ring one is provided with several limiting grooves, and the rear side of the locking ring two is fixedly connected with several limiting rods, the rear sides of the several limiting rods being adapted to the several limiting grooves.

[0008] Furthermore, a spring is fitted on the outer wall of the first rotating shaft, the front side of the spring is fixedly connected to the handle, and the rear side of the spring is fixedly connected to the second locking ring.

[0009] Furthermore, bevel gears are fixedly connected to the outer walls of both the second and first rotating shafts, and the two bevel gears mesh with each other. A connecting rod is fixedly connected to the outer wall of the second rotating shaft.

[0010] Furthermore, two connecting rods are hinged at the bottom of the first connecting rod, and two sliding grooves are provided on the worktable, both of which penetrate the worktable.

[0011] Furthermore, the tops of the two connecting rods are rotatably connected to the shafts, the tops of the two shafts pass through the two sliding grooves respectively, the two shafts are slidably connected to the two sliding grooves respectively, and clamps are fixedly connected to the outer walls of the two shafts.

[0012] Furthermore, the top of the workbench has two trapezoidal grooves, the bottom of each of the two clamping plates is fixedly connected to two trapezoidal sliders, the bottom of several trapezoidal sliders extends into the two trapezoidal grooves, and several trapezoidal sliders are slidably connected to the two trapezoidal grooves.

[0013] This utility model has the following beneficial effects: 1. By setting a locking mechanism, before turning the handle, the second locking ring needs to be pulled to move it forward until the limit rod disengages from the limit groove. During this process, the spring is compressed, undergoes elastic deformation, and generates elastic force. When turning the handle, the second locking ring needs to rotate synchronously. After clamping is completed, the second locking ring is released. At this time, the spring releases its elastic force and pushes the limit rod into the limit groove, completing the locking of the first rotating shaft. This effectively avoids the problem of part positioning shift caused by the loosening of the clamping plate as the processing time increases. During the clamping process, the locking of the limit rod and the elasticity of the spring can ensure that the clamping plate remains stable during the processing, thereby reducing the risk of dimensional deviation and non-compliance of form and position tolerances, and improving the accuracy and pass rate of part processing. 2. By setting up a centering clamping mechanism, when it is necessary to clamp the part, the handle can be turned to drive the first rotating shaft to rotate. At this time, the second rotating shaft will rotate with the first rotating shaft under the connection of the bevel gear, which in turn drives the first connecting rod to rotate. During this process, the clamping plate on the third rotating shaft will move with the connection of the second connecting rod. The clamping plate is also linearly constrained by the trapezoidal groove and the trapezoidal slider. The two clamping plates will move closer to each other with the rotation of the first rotating shaft until the part is clamped. This allows the two clamping plates to approach synchronously, which not only achieves a stable and adjustable clamping force, but also ensures that the part is automatically centered during the clamping process, eliminating positioning errors caused by eccentricity, ensuring accurate clamping position and uniform force. The cooperation of the trapezoidal groove and the trapezoidal slider provides rigid guidance, ensuring the stable movement of the two clamping plates.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a bottom view of the structure of this utility model; Figure 3 This is a partial cross-sectional view of the locking mechanism of this utility model; Figure 4 This is a partial structural schematic diagram of the centering and clamping mechanism of this utility model; Figure 5 This utility model Figure 1 A magnified structural diagram of A in the diagram.

[0017] The attached diagram lists the components represented by each number as follows: 1. Workbench; 2. Locking mechanism; 211. U-shaped support plate; 212. Rotating shaft one; 213. Handle; 214. Locking ring one; 215. Locking ring two; 216. Limiting groove; 217. Limiting rod; 218. Spring; 3. Centering clamping mechanism; 311. Rotating shaft two; 312. Bevel gear; 313. Connecting rod one; 314. Connecting rod two; 315. Slide groove; 316. Rotating shaft three; 317. Clamping plate; 318. Trapezoidal slide groove; 319. Trapezoidal slider. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-5 As shown, this utility model is a positioning fixture for parts processing, including a worktable 1, on which a locking mechanism 2 and a centering clamping mechanism 3 are provided; The locking mechanism 2 includes two U-shaped support plates 211 fixedly connected to the bottom of the workbench 1. A rotating shaft 212 is rotatably connected between the two U-shaped support plates 211. The front side of the rotating shaft 212 passes through the U-shaped support plate 211 located on the front side. A handle 213 is fixedly connected to the front extension of the rotating shaft 212. The centering clamping mechanism 3 includes a rotating shaft 311 rotatably connected to the bottom of the workbench 1.

[0020] A locking ring 214 is fitted onto the outer wall of the first rotating shaft 212. The rear side of the locking ring 214 is fixedly connected to the U-shaped support plate 211 located on the front side. A second locking ring 215 is fitted onto the outer wall of the first rotating shaft 212. Several limiting grooves 216 are opened on the front side of the first locking ring 214. Several limiting rods 217 are fixedly connected to the rear side of the second locking ring 215. The rear sides of the limiting rods 217 are adapted to the limiting grooves 216. A spring 218 is fitted onto the outer wall of the first rotating shaft 212. The front side of spring 218 is fixedly connected to handle 213, and the rear side of spring 218 is fixedly connected to locking ring 215. By setting locking mechanism 2, the problem of part positioning displacement caused by loosening of clamping plate 317 as processing time increases is effectively avoided. During the clamping process, the locking of limit rod 217 and the elasticity of spring 218 can ensure that clamping plate 317 remains stable during processing, thereby reducing the risk of dimensional deviation and non-compliance of form and position tolerance, and improving the accuracy and pass rate of part processing.

[0021] Both the second rotating shaft 311 and the first rotating shaft 212 are fixedly connected to the outer walls of bevel gears 312, which mesh with each other. A connecting rod 313 is fixedly connected to the outer wall of the second rotating shaft 311. Two connecting rods 314 are hinged to the bottom of the first connecting rod 313. Two sliding grooves 315 are provided on the worktable 1, both of which penetrate the worktable 1. The tops of the two connecting rods 314 are rotatably connected to a third rotating shaft 316, the tops of which respectively penetrate the two sliding grooves 315. The two rotating shafts 316 are slidably connected to the two sliding grooves 315. Clamping plates 317 are fixedly connected to the outer walls of both rotating shafts 316. The top of the worktable 1... The part has two trapezoidal grooves 318. The bottom of each of the two clamping plates 317 is fixedly connected to two trapezoidal sliders 319. The bottom of several trapezoidal sliders 319 extends into the two trapezoidal grooves 318. Several trapezoidal sliders 319 are slidably connected to the two trapezoidal grooves 318. By setting a centering clamping mechanism 3, the two clamping plates 317 can approach each other synchronously. This not only achieves a stable and adjustable clamping force, but also ensures that the parts are automatically centered during the clamping process, eliminating positioning errors caused by eccentricity, and ensuring accurate clamping position and uniform force. The cooperation between the trapezoidal grooves 318 and the trapezoidal sliders 319 provides rigid guidance, ensuring the stable movement of the two clamping plates 317.

[0022] A specific application of this embodiment is as follows: In use, the part to be processed is first placed on the top of the workbench 1. When it is necessary to clamp the part, the handle 213 can be turned to drive the rotating shaft 212 to rotate. At this time, the rotating shaft 311 will rotate with the rotating shaft 212 under the connection of the bevel gear 312, which in turn drives the connecting rod 313 to rotate. During this process, the clamping plate 317 on the rotating shaft 316 will move with the connection of the connecting rod 314. The clamping plate 317 is also linearly constrained by the trapezoidal groove 318 and the trapezoidal slider 319. The two clamping plates 317 will move closer to each other as the rotating shaft 212 rotates until the part is clamped. Before turning the handle 213, the locking ring 215 needs to be pulled to move it forward until the limiting rod 217 is disengaged from the limiting groove 216. During this process, the spring 218 will be compressed, undergo elastic deformation and generate elastic force. When turning the handle 213, the locking ring 215 needs to rotate synchronously. After clamping is completed, the locking ring 215 is released. At this time, the spring 218 releases its elastic force and pushes the limiting rod 217 into the limiting groove 216, thus completing the locking of the rotating shaft 212.

[0023] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning fixture for machining parts, characterized in that: It includes a workbench (1), on which a locking mechanism (2) and a centering clamping mechanism (3) are provided. The locking mechanism (2) includes two U-shaped support plates (211) fixedly connected to the bottom of the workbench (1), and a rotating shaft (212) is rotatably connected between the two U-shaped support plates (211). The front side of the rotating shaft (212) passes through the U-shaped support plate (211) located on the front side, and a handle (213) is fixedly connected to the front extension of the rotating shaft (212). The centering clamping mechanism (3) includes a rotating shaft (311) rotatably connected to the bottom of the workbench (1).

2. The positioning fixture for machining parts according to claim 1, characterized in that, A locking ring 1 (214) is fitted on the outer wall of the first rotating shaft (212). The rear side of the locking ring 1 (214) is fixedly connected to the U-shaped support plate (211) located on the front side. A locking ring 2 (215) is fitted on the outer wall of the first rotating shaft (212).

3. A positioning fixture for machining parts according to claim 2, characterized in that, The front side of the first locking ring (214) is provided with several limiting grooves (216), and the rear side of the second locking ring (215) is fixedly connected with several limiting rods (217), and the rear side of the several limiting rods (217) is adapted to the several limiting grooves (216).

4. A positioning fixture for machining parts according to claim 3, characterized in that, A spring (218) is fitted on the outer wall of the first rotating shaft (212). The front side of the spring (218) is fixedly connected to the handle (213), and the rear side of the spring (218) is fixedly connected to the second locking ring (215).

5. A positioning fixture for machining parts according to claim 4, characterized in that, Both the second rotating shaft (311) and the first rotating shaft (212) are fixedly connected to bevel gears (312), and the two bevel gears (312) mesh with each other. The second rotating shaft (311) is fixedly connected to the outer wall of the first rotating shaft (313).

6. A positioning fixture for machining parts according to claim 5, characterized in that, The bottom of the first connecting rod (313) is hinged with two second connecting rods (314), and two slide grooves (315) are opened on the workbench (1), both of which penetrate the workbench (1).

7. A positioning fixture for machining parts according to claim 6, characterized in that, The top of each of the two connecting rods (314) is rotatably connected to a pivot (316), the top of each of the two pivots (316) passes through two slide grooves (315), the two pivots (316) are slidably connected to the two slide grooves (315), and a clamp (317) is fixedly connected to the outer wall of each of the two pivots (316).

8. A positioning fixture for machining parts according to claim 7, characterized in that, The top of the workbench (1) has two trapezoidal slides (318), and the bottom of the two clamps (317) is fixedly connected to two trapezoidal sliders (319). The bottom of several trapezoidal sliders (319) extends into the two trapezoidal slides (318), and several trapezoidal sliders (319) are slidably connected to the two trapezoidal slides (318).

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