Positioning fixture for machining

Abstract

The utility model relates to mechanical processing equipment technical field, concretely is a kind of positioning fixture for machining, the positioning fixture for machining includes: base, the upper surface of base is equipped with several stand, the top of stand is equipped with placing plate, the surface of placing plate is fixed to the top of stand by several first screw, the center of base is equipped with support assembly, the top outer surface of support assembly is equipped with rotating plate;Beneficial effects are: the positioning fixture for machining proposed in the utility model, support assembly, movable plate, lifting assembly and clamping block are used mutually, so that support assembly supports rotating plate, and it is convenient for clamping block to be positioned and stably clamped according to the workpiece of different height size under the action of lifting assembly and placed in the center of placing plate, avoid the influence of clamping gravity center deviation on the clamping stability of workpiece, and reduce the cost input brought by replacement clamp simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment, specifically a positioning fixture for machining. Background Technology

[0002] In mechanical manufacturing, a fixture is a device used to fix a workpiece for operation or inspection. In a broader sense, any device used to quickly, conveniently, and safely install a workpiece in any step of the process can be called a fixture. When processing a workpiece, it is necessary to place the workpiece in a specific position to make the operation and processing data more accurate. Therefore, it is necessary to position the workpiece in multiple ways.

[0003] Existing positioning fixtures, in order to avoid clamping wear on the workpiece surface, use clamping and fixing of the workpiece sidewalls while facilitating surface processing. When clamping workpieces of different shapes, sizes and heights, different chucks are required to avoid instability when clamping taller workpieces. This necessitates changing different chucks, resulting in poor stability of the positioning fixture and increased costs and reduced profits due to the use of multiple chucks.

[0004] Therefore, this utility model proposes a positioning fixture for machining to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a positioning fixture for machining to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for machining, the positioning fixture for machining comprising: a base, a plurality of columns mounted on the upper surface of the base, a placement plate mounted on the top of the columns, and the surface of the placement plate being fixed to the top of the columns by a plurality of first screws;

[0007] A support component is installed at the center of the base. A rotating plate is fitted on the top outer surface of the support component. Several evenly distributed arc grooves are opened on the surface of the rotating plate. The arc grooves penetrate the interior of the rotating plate. A sliding rod is installed through the interior of the arc groove. Several movable plates are installed at the bottom of the sliding rod. The movable plates are L-shaped plates. A lifting component is installed on the top of the movable plates. A clamping block is installed on the top of the lifting component.

[0008] Preferably, the lifting assembly includes a fixed sleeve, a spring fixed to the bottom of the inner wall of the fixed sleeve, a movable rod fixed to the top of the spring, the movable rod being slidably connected inside the fixed sleeve, the top of the movable rod being fixed to the bottom of the clamping block, a threaded hole being provided on the side wall of the fixed sleeve, a third screw being screwed onto the side wall of the threaded hole, and the third screw being tightened to the side wall of the movable rod.

[0009] Preferably, a fastening screw is installed through the top of the slide bar, the fastening screw penetrates the interior of the movable plate, and a right-angle groove is opened in the center of the side wall of the clamping block.

[0010] Preferably, a number of limiting blocks are fixed to the top of the base, and the limiting blocks are located on both sides of the movable plate.

[0011] Preferably, the support assembly includes a support cylinder, one end of which passes through the center of the rotating plate, and the other end of which is fitted with a bearing fixed inside the base. The support cylinder and the top center of the rotating plate are fixed together by a second screw.

[0012] Preferably, a cylinder is fixedly installed on the side wall of the base, and a telescopic rod is installed at the output end of the cylinder.

[0013] Preferably, a slider is installed at the outer end of the telescopic rod, and the top of the slider is fixed to the bottom of the rod by fastening screws.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The positioning fixture for machining proposed in this utility model utilizes a support assembly, a movable plate, a lifting assembly, and a clamping block in cooperation. The support assembly supports the rotating plate, and the clamping block, under the action of the lifting assembly, is positioned and stably clamped in the center of the placement plate according to the workpieces of different heights and sizes. This avoids the impact of the clamping center of gravity shift on the clamping stability of the workpieces and reduces the cost of replacing fixtures. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the positioning fixture for machining according to this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the positioning clamp of this utility model;

[0018] Figure 3 This is a three-dimensional disassembled structural diagram of the lifting component of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the base and the placement plate of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the drive plate of this utility model, which rotates to move the clamping assembly.

[0021] In the diagram: 1. Base; 2. Column; 3. Placement plate; 4. Support assembly; 5. Rotating plate; 6. Arc groove; 7. Slide rod; 8. Movable plate; 9. Lifting assembly; 10. Fastening screw; 11. Clamping block; 12. Right angle groove; 13. Limiting block; 14. Support cylinder; 15. Bearing; 16. Cylinder; 17. Telescopic rod; 18. Slider; 19. First screw; 20. Second screw; 21. Fixing sleeve; 22. Spring; 23. Moving rod; 24. Threaded hole; 25. Third screw. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Example 1: Please refer to Figures 1-5 This utility model provides a technical solution: a positioning fixture for machining, comprising: a base 1, a plurality of columns 2 mounted on the upper surface of the base 1, a placement plate 3 mounted on the top of the columns 2, the surface of the placement plate 3 being fixed to the top of the columns 2 by a plurality of first screws 19, a support assembly 4 mounted at the center of the base 1, a rotating plate 5 sleeved on the top outer surface of the support assembly 4, a plurality of evenly distributed annular arc grooves 6 formed on the surface of the rotating plate 5, the arc grooves 6 penetrating the interior of the rotating plate 5, a sliding rod 7 being installed through the interior of the arc grooves 6, a plurality of movable plates 8 mounted at the bottom end of the sliding rods 7, the movable plates 8 being L-shaped plates, and a lifting assembly 9 mounted on the top of the movable plates 8. A clamping block 11 is installed on the top of the lifting assembly 9, which includes a fixed sleeve 21. A spring 22 is fixed to the bottom of the inner wall of the fixed sleeve 21, and a moving rod 23 is fixed to the top of the spring 22. The moving rod 23 is slidably connected inside the fixed sleeve 21, and the top of the moving rod 23 is fixed to the bottom of the clamping block 11. A threaded hole 24 is opened on the side wall of the fixed sleeve 21, and a third screw 25 is screwed onto the side wall of the threaded hole 24. The third screw 25 is tightened with the side wall of the moving rod 23. A fastening screw 10 is installed through the top of the sliding rod 7 and penetrates into the interior of the movable plate 8. A right-angle groove 12 is opened in the center of the side wall of the clamping block 11.

[0024] In use, the placement plate 3 is fastened to the top of the column 2 by the first screw 19, facilitating the placement of mechanical workpieces. The rotating plate 5 rotates, causing the slide rod 7 to rotate inside the arc groove 6. The movable plate 8 is fixed to the slide rod 7 by the fastening screw 10. The fastening screw 10 facilitates the installation and disassembly of the movable plate 8, slide rod 7, and rotating plate 5, making it convenient for subsequent use with workpieces of different sizes. The slide rod 7 moves within the arc groove 6, simultaneously moving the movable plate 8 and the clamping block 11. The right-angle groove 12 on the side wall of the clamping block 11 facilitates the positioning and clamping of workpieces with right angles, while also allowing for the clamping of workpieces with... The curved workpiece is clamped from multiple sides, which facilitates clamping workpieces of different shapes. The lifting assembly 9 is used to lift the moving rod 23, thereby adjusting the height of the clamping block 11. This allows the clamping block 11 to be moved to the center of the height of the workpiece to be processed at different heights for clamping. The moving rod 23 and the clamping block 11 are clamped and stabilized by tightening the third screw 25. The spring 22 provides a constant downward pulling force to the moving rod 23, so that when disassembling, the moving rod 23 is subjected to the force provided by the spring 22, which allows the clamping block 11 to move spontaneously to the initial position.

[0025] Example 2: Based on Example 1, a structure is provided to limit the movable plate 8 and support the rotating plate 5. Several sets of limiting blocks 13 are fixed on the top of the base 1. The limiting blocks 13 are located on both sides of the movable plate 8. The support assembly 4 includes a support cylinder 14. One end of the support cylinder 14 passes through the center of the rotating plate 5. The other end of the support cylinder 14 is equipped with a bearing 15. The bearing 15 can rotate freely when the rotating plate 5 is in use to reduce the limiting effect of friction. The bearing 15 is fixed inside the base 1. The top center of the support cylinder 14 and the rotating plate 5 are fixed together by a second screw 20.

[0026] In use, the limiting block 13 on the base 1 limits the two sides of the movable plate 8 to prevent the rotating plate 5 from rotating and causing the movable plate 8 to rotate. The support assembly 4 connects and fixes the rotating plate 5 to the bearing 15 through the support cylinder 14. The bearing 15 is embedded in the inside of the base 1. The support cylinder 14 and the rotating plate 5 are fixed by the second screw 20. At the same time, the second screw 20 facilitates the installation and disassembly of the rotating plate 5, making it easy to replace and repair the rotating plate 5, and to use rotating plates 5 with different diameters. The size of the inner arc groove 6 of the rotating plates 5 with different diameters is different, which makes it convenient to replace different rotating plates 5 according to the size of the workpiece to be positioned.

[0027] Example 3: Based on Example 2, a structure is provided to drive the rotating plate 5 to rotate. A cylinder 16 is fixedly installed on the side wall of the base 1. A telescopic rod 17 is installed at the output end of the cylinder 16. A slider 18 is installed at the outer end of the telescopic rod 17. The top of the slider 18 is fixed to the bottom of the slider 7 by fastening screws 10.

[0028] In use, the cylinder 16, under the control of the power system, pushes the telescopic rod 17 to extend and retract, which in turn drives the slider 18 to extend and retract, thereby driving the slide rod 7 to move inside the arc groove 6, which in turn drives the rotating plate 5 to rotate, and further causes the slide rod 7 on the surface of the rotating plate 5 to slide synchronously inside the arc groove 6. Under the limit of the arc groove 6, it can drive the movable plate 8 at the bottom of other slide rods 7 to move smoothly.

[0029] In actual use, the placement plate 3 is fastened to the top of the column 2 by the first screw 19, facilitating the placement of mechanical workpieces. The rotating plate 5 is connected and fixed to the bearing 15 by the support cylinder 14. The bearing 15 is embedded inside the base 1. The support cylinder 14 and the rotating plate 5 are fixed by the second screw 20. Under the control of the power system, the cylinder 16 pushes the telescopic rod 17 to extend and retract, thereby driving the slider 18 to extend and retract, thus driving the slide rod 7 to move inside the arc groove 6, which in turn drives the rotating plate 5 to rotate. This further allows the slide rod 7 on the surface of the rotating plate 5 to slide synchronously inside the arc groove 6. Under the limit of the arc groove 6, the movable plate 8 at the bottom of other slide rods 7 can move smoothly. The lifting assembly 9's moving rod 23 is pulled up to adjust the height of the clamping block 11, allowing the clamping block 11 to move to the center of the workpiece at different heights for clamping. The moving rod 23 and the clamping block 11 are clamped securely by tightening the third screw 25. The spring 22 provides a constant downward pulling force to the moving rod 23, so that when disassembling, the moving rod 23, under the force provided by the spring 22, allows the clamping block 11 to move spontaneously to the initial position. The right-angle groove 12 on the side wall of the clamping block 11 facilitates the positioning and clamping of workpieces with right angles, and also allows for multi-faceted clamping of workpieces with arc shapes, thus facilitating the clamping of workpieces of different shapes and sizes.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for machining, characterized in that: The positioning fixture for machining includes: a base (1), a plurality of columns (2) are mounted on the upper surface of the base (1), a placement plate (3) is mounted on the top of the columns (2), and the surface of the placement plate (3) is fixed to the top of the columns (2) by a plurality of first screws (19); A support component (4) is installed at the center of the base (1). A rotating plate (5) is fitted on the top outer surface of the support component (4). Several arc grooves (6) are evenly distributed in a ring array on the surface of the rotating plate (5). The arc grooves (6) penetrate the interior of the rotating plate (5). A sliding rod (7) is installed through the interior of the arc grooves (6). Several movable plates (8) are installed at the bottom of the sliding rod (7). The movable plates (8) are L-shaped plates. A lifting component (9) is installed on the top of the movable plates (8). A clamping block (11) is installed on the top of the lifting component (9).

2. The positioning fixture for machining according to claim 1, characterized in that: The lifting assembly (9) includes a fixed sleeve (21), a spring (22) is fixed at the bottom of the inner wall of the fixed sleeve (21), a moving rod (23) is fixed at the top of the spring (22), the moving rod (23) is slidably connected inside the fixed sleeve (21), the top of the moving rod (23) is fixed at the bottom of the clamping block (11), a threaded hole (24) is opened on the side wall of the fixed sleeve (21), a third screw (25) is screwed onto the side wall of the threaded hole (24), and the third screw (25) is tightened with the side wall of the moving rod (23).

3. A positioning fixture for machining according to claim 1, characterized in that: A fastening screw (10) is installed through the top of the slide bar (7), and the fastening screw (10) is inserted into the interior of the movable plate (8). A right-angle groove (12) is provided in the center of the side wall of the clamping block (11).

4. A positioning fixture for machining according to claim 1, characterized in that: The top of the base (1) is fixed with several sets of limiting blocks (13), which are located on both sides of the movable plate (8).

5. A positioning fixture for machining according to claim 1, characterized in that: The support assembly (4) includes a support cylinder (14), one end of which passes through the center of the rotating plate (5), and the other end of which is fitted with a bearing (15). The bearing (15) is fixed inside the base (1), and the top center of the support cylinder (14) and the rotating plate (5) are fixed together by a second screw (20).

6. A positioning fixture for machining according to claim 1, characterized in that: A cylinder (16) is fixedly installed on the side wall of the base (1), and a telescopic rod (17) is installed at the output end of the cylinder (16).

7. A positioning fixture for machining according to claim 6, characterized in that: The outer end of the telescopic rod (17) is equipped with a slider (18), and the top of the slider (18) is fixed to the bottom of the slide rod (7) by a fastening screw (10).

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