A quick positioning and clamping fixture

Abstract

This utility model provides a quick positioning and clamping fixture, including a clamping body, a positioning shaft above the clamping body, a workpiece to be processed mounted above the clamping body, with the positioning shaft passing through the interior of the workpiece and protruding at its upper end; a limiting platform above the positioning shaft, with a screw at the center of the limiting platform; a positioning plate placed above the workpiece, with a positioning hole in the positioning plate, and a positioning pin installed at one end of the positioning plate; a washer above the positioning plate, and a nut connected to the screw above the washer. This utility model, through the positioning plate and the pin, can quickly position and clamp non-fully rotating parts requiring angular positioning. The positioning element is reasonably designed, the part positioning accuracy is reliable, and it can effectively guarantee the part positioning accuracy and yield.

Description

Technical Field

[0001] This utility model belongs to the field of machining fixture technology, and in particular relates to a quick positioning and clamping fixture. Background Technology

[0002] In the field of machining, the clamping and positioning of non-fully rotating parts requiring angular positioning during machining has always been a key issue affecting machining accuracy and production efficiency. The traditional clamping method is to first pre-position the workpiece using a three-jaw chuck, then manually align and pre-mark the workpiece, or use the machine tool spindle (tool holder, cutting tool, etc.) to position the workpiece, and then clamp the workpiece before machining. This method has certain shortcomings: 1. It often relies on manual adjustment or additional auxiliary positioning elements, making the positioning process cumbersome and difficult to guarantee accuracy, which can easily lead to large machining errors and low yield; 2. Traditional tooling has poor adaptability to non-fully rotating parts and cannot meet the rapid positioning needs of parts with different shapes. Especially when facing machining scenarios that require frequent part changes, the versatility and convenience of the tooling are clearly insufficient. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a quick positioning and clamping fixture, and the technical solution adopted is as follows:

[0004] A quick positioning and clamping fixture includes a clamping body, a positioning shaft provided above the clamping body, a workpiece to be processed being mounted above the clamping body, and the positioning shaft passing through the interior of the workpiece and protruding at its upper end; a limiting platform is provided above the positioning shaft, and a screw is provided at the center of the limiting platform.

[0005] A positioning plate is placed on the upper end of the part to be processed. A positioning hole is opened in the positioning plate, and a positioning pin is installed at one end of the positioning plate. A washer is placed above the positioning plate, and a nut connected to the screw is placed above the washer.

[0006] Furthermore, a pin hole for installing a positioning pin is provided at one end of the positioning plate.

[0007] Furthermore, the limiting platform has a flat oval structure, and the positioning hole has the same shape as the limiting platform. The positioning hole and the limiting platform cooperate to prevent the positioning plate from rotating.

[0008] Furthermore, the gasket has an open structure, which facilitates the removal and insertion of the gasket from above the clamping body.

[0009] Furthermore, the maximum outer diameter of the nut is smaller than the positioning hole in the positioning plate, so that the part and the positioning plate can be removed directly through the nut without completely removing the nut, thereby achieving the purpose of quick clamping.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This utility model can quickly position and clamp non-fully rotating parts with angular positioning requirements by using a positioning plate and pins. The positioning element is reasonably designed, the positioning accuracy of the parts is reliable, and it can well guarantee the positioning accuracy of the parts and the yield rate.

[0012] 2. This utility model uses an open-shaped washer and a positioning hole larger than the maximum outer diameter of the nut, which makes it easy for the washer to be pulled out directly from the screw at the top of the clamping body. Without completely unscrewing the clamping nut 4, the parts can be directly removed or installed, thereby achieving the purpose of quick loading and unloading of workpieces, shortening the auxiliary clamping time of parts and improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram showing the state of the gasket after removal in this utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the exploded decomposition structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the positioning plate of this utility model.

[0018] In the picture:

[0019] 1-Clamping body, 11-Positioning shaft, 12-Limiting platform, 13-Screw, 2-Positioning plate, 21-Positioning hole, 22-Pin hole, 3-Washer, 4-Nut, 5-Positioning pin, 6-Part to be processed. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] As attached Figure 1-5 As shown.

[0022] A quick positioning and clamping fixture includes a fixture body 1, a cylindrical positioning shaft 11 is provided above the fixture body 1, the workpiece 6 to be processed is installed above the fixture body 1, and the positioning shaft 11 passes through the interior of the workpiece 6 to be processed and protrudes at the upper end.

[0023] A limiting platform 12 is provided above the positioning shaft 11. The limiting platform 12 has a flat round structure. A screw 13 is provided at the center of the limiting platform 12. The height of the upper surface of the part to be processed 6 is between the limiting platforms 12. After the part to be processed 6 is placed above the fixture 1, a positioning plate 2 is placed on the upper end of the part to be processed 6. A positioning hole 21 with the same shape as the limiting platform 12 is opened in the positioning plate 2.

[0024] Based on the above structure, a gasket 3 is provided above the positioning plate 2, and a nut 4 connected to the screw 13 is provided above the gasket 3.

[0025] One end of the positioning plate 2 is provided with a pin hole 22 for installing the positioning pin 5. Based on the above structure, the usage of this device is as follows: 1. First, fix the fixture 1 to the worktable of the processing equipment. It can be connected to a three-jaw chuck or a flat-jaw vise and other general auxiliary tools. At the same time, align the positioning shaft and the reference surface of the fixture 1 to determine the processing reference point.

[0026] 2. Place the workpiece 6 to be processed into the positioning shaft 11 of the fixture body 1, so that the reference hole in the workpiece 6 is in contact with the positioning shaft, and the lower end face of the workpiece 6 is in contact with the reference surface of the fixture body 1. At this time, the angular displacement of the workpiece is unlimited, and it can rotate around the center.

[0027] 3. Insert the positioning plate 2 into the clamp body 1, so that the limiting platform 12 at the upper end of the clamp body 1 and the positioning hole 21 in the positioning plate 2 cooperate. At this time, the angular rotation of the positioning plate 2 is restricted and cannot be rotated.

[0028] 4. Rotate the part to be processed 6 so that the angular positioning reference surface of the part contacts the positioning pin 5 installed on the positioning plate 2. At this time, the part to be processed 6 can no longer rotate forward, thereby achieving the purpose of angular positioning.

[0029] 5. At this point, the washer 3 can be inserted into the screw 13 at the upper end of the clamp body 1. The washer 3 has an open structure and can be inserted from the side, without having to be inserted from the top of the screw 13.

[0030] 6. Finally, tighten the nut 4 in the screw 13 at the upper end of the pre-installed clamping body 1 to press the washer 3, the positioning plate 2 and the workpiece 6 to be processed, thereby completing the clamping of the workpiece.

[0031] Finally, after the part is machined, loosen the nut 4 used for clamping (it is not necessary to unscrew it completely), and the washer 3 can be pulled out. Then, the part along with the positioning plate 2 can be directly removed from the nut 4 (since the diameter of the nut 4 is smaller than the positioning hole 21). Conversely, when installing the part 6 to be machined, the nut 4 can also pass directly through the part and the positioning plate 2, so that the part and the positioning plate 2 can be directly installed into the corresponding position in the fixture 1. Then, repeat the above steps 4-6 to achieve part clamping.

[0032] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A quick positioning and clamping fixture, comprising a clamping body (1), characterized in that: A positioning shaft (11) is provided above the fixture body (1). The workpiece (6) to be processed is installed above the fixture body (1), and the positioning shaft (11) passes through the inside of the workpiece (6) to be processed and protrudes at the upper end. A limiting platform (12) is provided above the positioning shaft (11), and a screw (13) is provided at the center of the limiting platform (12). A positioning plate (2) is placed on the upper end of the part to be processed (6). A positioning hole (21) is opened in the positioning plate (2). A positioning pin (5) is installed at one end of the positioning plate (2). A washer (3) is provided above the positioning plate (2). A nut (4) connected to the screw (13) is provided above the washer (3).

2. The quick positioning and clamping fixture as described in claim 1, characterized in that: One end of the positioning plate (2) is provided with a pin hole (22) for installing the positioning pin (5).

3. The quick positioning and clamping fixture as described in claim 1, characterized in that: The limiting platform (12) has a flat round structure, and the positioning hole (21) has the same shape as the limiting platform (12).

4. The quick positioning and clamping fixture as described in claim 1, characterized in that: The gasket (3) has an open structure.

5. The quick positioning and clamping fixture as described in claim 1, characterized in that: The maximum outer diameter of the nut (4) is smaller than the positioning hole (21) in the positioning plate (2).

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